@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    overflow-x: hidden;
    scroll-behavior: smooth;
}

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --dark: #0f172a;
    --gray: #1e293b;
    --light: #f1f5f9;
    --accent: #a78bfa;
    --text: #0f172a;
    --text-light: #64748b;
    --purple: #8b5cf6;
    --pink: #ec4899;
    --blue: #3b82f6;
    --green: #10b981;
    --cyan: #06b6d4;
    --red: #ef4444;
    --orange: #f59e0b;
    --yellow: #fbbf24;
    --nav-button-width: 170px;
    --nav-button-height: 48px;

    /* Animation Timing */
    --timing-fast: 200ms;
    --timing-base: 300ms;
    --timing-slow: 400ms;
    --timing-slower: 600ms;

    /* Easing Functions - More refined */
    --ease-out-smooth: cubic-bezier(0.23, 1, 0.32, 1);
    --ease-in-smooth: cubic-bezier(0.55, 0.055, 0.675, 0.19);
    --ease-bounce: cubic-bezier(0.68, -0.3, 0.265, 1.3);
    --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.175);
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

body {
    font-family: 'Inter', sans-serif;
    background: #ffffff;
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.nav-hidden {
    display: none !important;
}

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: #ffffff;
    border-bottom: 4px solid var(--dark);
    box-shadow: 8px 0 0 var(--dark);
    overflow: visible;
}

.nav.nav--overlay {
    background: rgba(0, 0, 0, 0.8);
    border-bottom: none;
    backdrop-filter: blur(10px);
    box-shadow: none;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    gap: 1rem;
}

.nav-tab-bar {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-left: auto;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.nav-tab-bar::-webkit-scrollbar {
    display: none;
}

.courses-tab {
    background: white;
    border: 3px solid var(--dark);
    color: var(--dark);
    font-weight: 700;
    font-size: 0.9rem;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    transition: all var(--timing-base) var(--ease-out-smooth);
    text-decoration: none;
    box-shadow: 4px 4px 0 var(--dark);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    min-width: 140px;
    text-align: center;
    display: inline-flex;
    align-items: center;
}

.courses-tab::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.05);
    transform: scale(0);
    transition: transform var(--timing-slow) var(--ease-out-smooth);
    border-radius: 50%;
}

.courses-tab:active::before {
    transform: scale(2.5);
}

.courses-tab:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--dark);
}

.courses-tab:active {
    transform: translate(4px, 4px) scale(0.98);
    box-shadow: 0 0 0 var(--dark);
}

.courses-tab.nav-link--current {
    background: var(--dark);
    color: white;
}

@media (max-width: 768px) {
    .nav-tab-bar {
        gap: 0.25rem;
        flex-wrap: wrap;
    }
    
    .nav-tab {
        font-size: 0.8rem;
        padding: 0.5rem 0.8rem;
    }
    
    .nav-tab-streak {
        font-size: 0.8rem;
        padding: 0.5rem 0.8rem;
    }
}

.nav-tab {
    background: white;
    border: 3px solid var(--dark);
    color: var(--dark);
    font-weight: 700;
    font-size: 0.9rem;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    transition: all var(--timing-base) var(--ease-out-smooth);
    text-decoration: none;
    box-shadow: 4px 4px 0 var(--dark);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    min-width: 140px;
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    position: relative;
    overflow: hidden;
}

.nav-tab::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.05);
    transform: scale(0);
    transition: transform var(--timing-slow) var(--ease-out-smooth);
    border-radius: 50%;
}

.nav-tab:active::before {
    transform: scale(2.5);
}

.nav-tab:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--dark);
}

.nav-tab:active {
    transform: translate(4px, 4px) scale(0.98);
    box-shadow: 0 0 0 var(--dark);
}

.nav-tab.nav-link--current {
    background: var(--dark);
    color: white;
}

.nav-tab-streak {
    background: white;
    border: 3px solid var(--dark);
    padding: 0.75rem 1rem;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--dark);
    cursor: default;
    box-shadow: 4px 4px 0 var(--dark);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    display: inline-flex;
    align-items: center;
    min-width: 140px;
    height: 48px;
}

.nav-tab-streak::before {
    content: '';
    width: 10px;
    height: 10px;
    background: var(--yellow);
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 12px var(--yellow);
    margin-right: 0.5rem;
}

.nav-tab-streak:hover {
    transform: none;
    box-shadow: 4px 4px 0 var(--dark);
}

.nav-logo {
    height: 40px;
    width: 40px;
    border-radius: 50%;
    border: 2px solid #000000;
    padding: 4px;
    box-sizing: border-box;
    transition: transform 0.2s;
    object-fit: contain;
}

.nav-logo:hover {
    transform: scale(1.05);
}

.nav-actions {
    position: absolute;
    top: calc(100% + 0.75rem);
    right: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
    background: #ffffff;
    border: 0 solid var(--dark);
    box-shadow: none;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    transition:
        max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1),
        opacity 0.25s ease,
        padding 0.25s ease,
        box-shadow 0.25s ease;
    width: min(320px, calc(100vw - 2.5rem));
    border-radius: 0;
    background-clip: padding-box;
    z-index: 200;
}

.nav-link, .mindwarp-button {
    color: var(--text);
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
    padding: 0.6rem 1rem;
    background: #ffffff;
    border: 3px solid var(--dark);
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 4px 4px 0 var(--dark);
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    min-height: var(--nav-button-height);
    height: var(--nav-button-height);
    width: var(--nav-button-width);
    flex: 0 0 var(--nav-button-width);
    line-height: 1;
}

.nav-profile-link {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.6rem 1.1rem;
    text-transform: none;
    letter-spacing: 0.02em;
}

.nav-link--current {
    background: var(--dark);
    color: #ffffff;
    box-shadow: 4px 4px 0 rgba(15, 23, 42, 0.6);
}

.nav-link--current .beta-badge {
    background: #ffffff;
    color: var(--dark);
}

.nav-actions.active {
    padding: 0.75rem;
    gap: 0.25rem;
    max-height: 1000px;
    opacity: 1;
    pointer-events: auto;
    border-width: 3px;
    box-shadow: 6px 6px 0 var(--dark);
}

.nav-divider {
    width: 100%;
    height: 1px;
    background: rgba(15, 23, 42, 0.1);
    margin: 0.75rem 0;
    border: none;
}

.nav-section-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-light);
    padding: 0.5rem 0.75rem 0.25rem;
    margin-top: 0.25rem;
}

.nav-secondary {
    opacity: 0.85;
    font-size: 0.95rem;
}

.nav-secondary:hover {
    opacity: 1;
}

.nav-link-secondary {
    background: transparent;
    border: none;
    box-shadow: none;
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 700;
    padding: 0.65rem 1rem;
    width: auto;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all var(--timing-base) var(--ease-out-smooth);
    position: relative;
}

.nav-link-secondary::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--timing-base) var(--ease-out-smooth);
}

.nav-link-secondary:hover {
    background: rgba(99, 102, 241, 0.08);
    color: var(--primary);
    transform: translateX(4px);
}

.nav-link-secondary:hover::before {
    width: 3px;
}

.nav-link-secondary:active {
    transform: translateX(2px);
    background: rgba(99, 102, 241, 0.12);
}

.nav-link-primary {
    background: var(--primary);
    color: #ffffff;
    font-weight: 800;
    margin-top: 0.5rem;
}

.nav-link-primary:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--dark);
    background: var(--primary-dark);
}

.nav-link-primary:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--dark);
}

.nav-link-logout {
    background: #ef4444 !important;
}

.nav-link-logout:hover {
    background: #dc2626 !important;
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 #b91c1c !important;
}

.nav-actions .nav-link,
.nav-actions .mindwarp-button,
.nav-actions button.nav-link {
    width: 100%;
    flex: 0 0 auto;
    max-width: none;
}

.nav.nav--overlay .nav-actions {
    background: rgba(15, 23, 42, 0.95);
    border-color: rgba(255, 255, 255, 0.45);
}

.nav.nav--overlay .nav-actions.active {
    box-shadow: 6px 6px 0 rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(8px);
}

.nav.nav--overlay .nav-actions .nav-link,
.nav.nav--overlay .nav-actions button.nav-link {
    background: transparent;
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.55);
    box-shadow: 3px 3px 0 rgba(255, 255, 255, 0.35);
}

.nav.nav--overlay .nav-actions .nav-link.nav-link--current,
.nav.nav--overlay .nav-actions button.nav-link.nav-link--current {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.7);
    box-shadow: 3px 3px 0 rgba(255, 255, 255, 0.45);
}

.nav-profile-avatar {
    width: 26px;
    height: 26px;
    border-radius: 0;
    overflow: hidden;
    border: 2px solid var(--dark);
    background: #ffd93d;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 3px 3px 0 var(--dark);
}

.nav-profile-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0;
}

.nav-profile-name {
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.nav-link--ghost {
    background: transparent;
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.3);
}

.nav-link--ghost:hover,
.nav-link--ghost:focus {
    color: #ffffff;
}

.beta-badge {
    font-size: 0.7rem;
    background: #ffd93d;
    color: var(--dark);
    padding: 0.1rem 0.4rem;
    border-radius: 0;
    font-weight: 700;
    line-height: 1;
    display: inline-flex;
    align-items: center;
}

.burger-menu {
    display: none; /* Hide by default */
    flex-direction: column;
    gap: 3px;
    background: white;
    border: 2px solid var(--dark);
    padding: 4px;
    cursor: pointer;
    transition: all 0.2s;
    border-radius: 0;
    width: 36px;
    height: 36px;
    justify-content: center;
    align-items: center;
    box-shadow: 3px 3px 0 var(--dark);
    z-index: 101;
    position: relative;
}

.is-authenticated .burger-menu {
    display: inline-flex; /* Show when authenticated */
}

.burger-menu:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--dark);
}

.burger-menu span {
    width: 16px;
    height: 2px;
    background: var(--dark);
    transition: all 0.3s;
    flex-shrink: 0;
    align-self: center;
}

.burger-menu.active,
.burger-menu:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--dark);
}

.nav.nav--overlay .burger-menu span {
    background: #ffffff;
}

.burger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.burger-menu.active span:nth-child(2) {
    opacity: 0;
}

.burger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

@media (max-width: 1024px) {
    .nav {
        box-shadow: none;
        position: relative;
    }

    .nav-container {
        padding: 1rem;
        position: relative;
    }

    .burger-menu {
        display: inline-flex;
        position: absolute;
        top: 50%;
        right: 1rem;
        transform: translateY(-50%);
        z-index: 1000;
        width: 28px;
        height: 28px;
    }

    .nav-actions {
        position: fixed;
        top: 80px;
        right: 1rem;
        left: 1rem;
        width: auto;
        max-width: calc(100vw - 2rem);
        border-radius: 8px;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(8px);
        flex-direction: column;
        gap: 0.25rem;
        padding: 0;
        max-height: 0;
        opacity: 0;
        overflow: hidden;
        pointer-events: none;
    }

    .nav-actions.active {
        max-height: calc(100vh - 120px);
        overflow-y: auto;
        overflow-x: hidden;
        padding: 1.25rem 1rem;
        opacity: 1;
        pointer-events: auto;
    }

    .nav-actions .nav-link,
    .nav-actions .mindwarp-button,
    .nav-actions button.nav-link {
        width: 100%;
        margin: 0;
        box-shadow: 3px 3px 0 var(--dark);
        font-size: 14px;
        padding: 0.75rem 1rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .nav-actions .nav-section-title {
        color: var(--text);
        font-size: 12px;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.05em;
        opacity: 0.7;
        margin-bottom: 0.5rem;
    }

    .nav-actions::before {
        display: none;
    }
}

.nav-link:hover, .mindwarp-button:hover {
    transform: translate(-2px, -2px);
    box-shadow: 8px 8px 0 var(--dark);
    background-color: var(--light);
}

.nav-link:active, .mindwarp-button:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--dark);
}

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0;
    text-align: center;
    background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 50%, #dbeafe 100%);
    color: var(--text);
    position: relative;
    overflow: hidden;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.floating-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    animation: float 20s infinite ease-in-out;
    will-change: transform, filter;
    backface-visibility: hidden;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #3b82f6 0%, #10b981 100%);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    top: 50%;
    right: -150px;
    animation-delay: 5s;
}

.shape-3 {
    width: 350px;
    height: 350px;
    background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
    bottom: -100px;
    left: 50%;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
        filter: blur(80px);
    }
    25% {
        transform: translate(30px, -30px) rotate(5deg);
        filter: blur(85px);
    }
    50% {
        transform: translate(-20px, 20px) rotate(-5deg);
        filter: blur(90px);
    }
    75% {
        transform: translate(20px, 30px) rotate(3deg);
        filter: blur(85px);
    }
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(15, 23, 42, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 23, 42, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 8rem 2rem 4rem;
    max-width: 1200px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.95);
    border: 3px solid var(--dark);
    box-shadow: 4px 4px 0 var(--dark);
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 2rem;
    animation: fadeInDown 1s var(--ease-spring);
}

.badge-icon {
    display: inline-flex;
    align-items: center;
    animation: pulse 2s infinite;
}

.badge-icon svg {
    width: 20px;
    height: 20px;
    color: var(--primary);
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.1); }
}

.hero-animation {
    margin-bottom: 2rem;
    animation: fadeInDown 1.2s var(--ease-spring) 0.15s both;
}

.animation-wrapper {
    position: relative;
    display: inline-block;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

#atlasAnimation {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    border: 5px solid var(--dark);
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.3);
    position: relative;
    z-index: 2;
    animation: logoFloat 4s infinite ease-in-out;
}

@keyframes logoFloat {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-15px);
    }
}

.animation-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.4) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 1;
    animation: glow 3s infinite ease-in-out;
}

@keyframes glow {
    0%, 100% {
        opacity: 0.5;
        transform: translate(-50%, -50%) scale(1);
        filter: blur(20px);
    }
    50% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.1);
        filter: blur(25px);
    }
}

.hero-heading {
    font-size: clamp(2.5rem, 8vw, 6rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    margin-bottom: 1.5rem;
    color: var(--text);
    line-height: 1.1;
    text-transform: uppercase;
    animation: fadeInUp 1.2s var(--ease-spring) 0.3s both;
}

.typewriter-text {
    display: inline-block;
    border-right: 4px solid #000000;
    padding-right: 0.1em;
    animation: blink 1s step-end infinite;
    color: #000000;
}

@keyframes blink {
    50% { border-color: transparent; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.gradient-text {
    background: linear-gradient(135deg, #3b82f6 0%, #10b981 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 750px;
    margin: 0 auto 3rem;
    line-height: 1.8;
    font-weight: 400;
    animation: fadeInUp 1.2s var(--ease-spring) 0.5s both;
}

.hero-text strong {
    color: var(--text);
    font-weight: 700;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 4rem;
    animation: fadeInUp 1.2s var(--ease-spring) 0.7s both;
}

.hero-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.25rem 2.5rem;
    font-size: 1rem;
    font-weight: 800;
    text-decoration: none;
    transition: all var(--timing-base) var(--ease-out-smooth);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    border: 4px solid var(--dark);
    overflow: hidden;
    will-change: transform, box-shadow;
    backface-visibility: hidden;
    -webkit-font-smoothing: antialiased;
}

.hero-button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.15);
    transform: scale(0);
    transition: transform var(--timing-slow) var(--ease-spring);
    border-radius: 50%;
    transform-origin: center;
}

.hero-button:active::before {
    transform: scale(2.5);
    transition-duration: 0ms;
}

.hero-button-primary {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 8px 8px 0 var(--dark);
}

.hero-button-primary:hover {
    transform: translate(-2px, -2px);
    box-shadow: 10px 10px 0 var(--dark);
}

.hero-button-primary:active {
    transform: translate(3px, 3px) scale(0.98);
    box-shadow: 5px 5px 0 var(--dark);
}

.hero-button-secondary {
    background: white;
    color: var(--dark);
    box-shadow: 8px 8px 0 var(--dark);
}

.hero-button-secondary::before {
    background: rgba(0, 0, 0, 0.04);
}

.hero-button-secondary:hover {
    transform: translate(-2px, -2px);
    box-shadow: 10px 10px 0 var(--dark);
    background: var(--light);
}

.hero-button-secondary:active {
    transform: translate(3px, 3px) scale(0.98);
    box-shadow: 5px 5px 0 var(--dark);
}

.hero-button-large {
    padding: 1.5rem 3rem;
    font-size: 1.15rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border: 4px solid var(--dark);
    box-shadow: 8px 8px 0 var(--dark);
    max-width: 700px;
    margin: 0 auto;
    animation: fadeInUp 1s ease-out 1s both;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 2px;
    height: 40px;
    background: var(--dark);
}

.hero-quote {
    margin: 5rem 0 3rem;
    max-width: 700px;
    padding: 2.5rem 3rem;
    background: var(--light);
    border: 4px solid var(--dark);
    box-shadow: 8px 8px 0 var(--dark);
    animation: fadeInUp 1s ease-out 1s both;
    position: relative;
}

.hero-quote .quote-text {
    font-size: 1.35rem;
    font-style: normal;
    color: var(--text);
    line-height: 1.7;
    margin-bottom: 1rem;
    font-weight: 500;
}

.hero-quote .quote-author {
    font-size: 1rem;
    color: var(--text-light);
    font-weight: 400;
    font-style: normal;
}

.hero-features {
    position: relative;
    z-index: 1;
    padding: 6rem 2rem;
    background: white;
    border-top: 4px solid var(--dark);
}

.features-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem;
}

.features-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    color: var(--text);
}

.features-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    font-weight: 400;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    padding: 2rem;
    background: #ffffff;
    text-align: left;
    transition: all var(--timing-slow) var(--ease-out-smooth);
    border: 4px solid var(--dark);
    box-shadow: 6px 6px 0 var(--dark);
    position: relative;
    display: flex;
    flex-direction: column;
    opacity: 0;
    transform: translateY(30px) scale(0.97);
    will-change: transform, opacity, box-shadow;
    backface-visibility: hidden;
    perspective: 1000px;
}

.feature-card.animate-in {
    animation: cardSlideIn 0.7s var(--ease-spring) forwards;
}

@keyframes cardSlideIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.97) rotateX(5deg);
    }
    50% {
        opacity: 0.5;
        transform: translateY(15px) scale(0.985) rotateX(2.5deg);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1) rotateX(0deg);
    }
}

.feature-card:nth-child(1) { animation-delay: 0s; }
.feature-card:nth-child(2) { animation-delay: 0.1s; }
.feature-card:nth-child(3) { animation-delay: 0.2s; }
.feature-card:nth-child(4) { animation-delay: 0.3s; }
.feature-card:nth-child(5) { animation-delay: 0.4s; }
.feature-card:nth-child(6) { animation-delay: 0.5s; }

.feature-card:hover {
    transform: translate(-3px, -3px);
    box-shadow: 9px 9px 0 var(--dark);
}

.feature-card:active {
    transform: translate(-1px, -1px);
    box-shadow: 7px 7px 0 var(--dark);
}

.feature-icon-wrapper {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light);
    border: 3px solid var(--dark);
    box-shadow: 4px 4px 0 var(--dark);
    margin-bottom: 1.5rem;
}

.feature-icon {
    line-height: 1;
}

.feature-icon-wrapper svg {
    width: 40px;
    height: 40px;
    color: var(--dark);
}

.feature-card-1 .feature-icon-wrapper {
    background: linear-gradient(135deg, #dbeafe 0%, #ede9fe 100%);
}

.feature-card-2 .feature-icon-wrapper {
    background: linear-gradient(135deg, #fce7f3 0%, #fee2e2 100%);
}

.feature-card-3 .feature-icon-wrapper {
    background: linear-gradient(135deg, #dcfce7 0%, #dbeafe 100%);
}

.feature-card-4 .feature-icon-wrapper {
    background: linear-gradient(135deg, #fef3c7 0%, #fed7aa 100%);
}

.feature-card-5 .feature-icon-wrapper {
    background: linear-gradient(135deg, #dbeafe 0%, #ede9fe 100%);
}

.feature-card-6 .feature-icon-wrapper {
    background: linear-gradient(135deg, #ffedd5 0%, #fef3c7 100%);
}

.feature-title {
    font-size: 1.35rem;
    font-weight: 800;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    color: var(--text);
}

.feature-description {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    flex: 1;
}

.feature-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag {
    padding: 0.4rem 0.8rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--light);
    border: 2px solid var(--dark);
    color: var(--dark);
}

.feature-title-1 {
    color: var(--primary);
}

.feature-title-2 {
    color: var(--orange);
}

.hero-cta-final {
    position: relative;
    z-index: 1;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    border-top: 4px solid var(--dark);
    padding: 6rem 2rem;
    text-align: center;
    color: white;
}

.cta-final-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-final-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.cta-final-text {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    font-weight: 400;
}

.hero-cta-final .hero-button-large {
    background: white;
    color: var(--primary);
    font-size: 1.2rem;
    padding: 1.75rem 3.5rem;
}

.hero-cta-final .hero-button-large:hover {
    background: var(--light);
}

.feature-title-3 {
    color: #10b981;
}

.feature-card p {
    color: var(--text);
    line-height: 1.7;
    font-size: 1.05rem;
}

.learning-page {
    background: linear-gradient(135deg, #f5f7fa 0%, #e8eef5 100%);
    min-height: 100vh;
}

.lesson-feedback-section {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 3px solid var(--dark);
}

.feedback-card {
    background: #ffffff;
    border: 4px solid var(--dark);
    padding: 2.5rem;
    box-shadow: 8px 8px 0 var(--dark);
}

.feedback-title {
    font-size: 1.75rem;
    font-weight: 900;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.feedback-subtitle {
    color: var(--text-light);
    margin-bottom: 2rem;
    font-size: 1rem;
}

.feedback-rating,
.feedback-difficulty,
.feedback-customization,
.feedback-pace {
    margin-bottom: 2rem;
}

.feedback-rating label,
.feedback-difficulty label,
.feedback-customization label,
.feedback-pace label {
    display: block;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
    color: var(--text);
}

.rating-stars {
    display: flex;
    gap: 0.5rem;
}

.star-btn {
    background: none;
    border: none;
    font-size: 2rem;
    color: #e5e7eb;
    cursor: pointer;
    transition: all 0.2s;
    padding: 0.25rem;
}

.star-btn:hover {
    transform: scale(1.2);
}

.star-btn.active {
    color: #fbbf24;
}

.difficulty-options,
.pace-options {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.difficulty-btn,
.pace-btn {
    padding: 0.75rem 1.5rem;
    background: #ffffff;
    border: 3px solid var(--dark);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.2s;
}

.difficulty-btn:hover,
.pace-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 4px 4px 0 var(--light);
}

.difficulty-btn.active,
.pace-btn.active {
    background: var(--primary);
    color: #ffffff;
    transform: translate(-2px, -2px);
    box-shadow: 4px 4px 0 var(--dark);
}

.feedback-customization textarea {
    width: 100%;
    padding: 1rem;
    border: 3px solid var(--dark);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    resize: vertical;
    transition: all 0.2s;
}

.feedback-customization textarea:focus {
    outline: none;
    box-shadow: 4px 4px 0 var(--light);
    transform: translate(-2px, -2px);
}

.feedback-submit-btn,
.feedback-skip-btn {
    padding: 1rem 2.5rem;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    border: 3px solid var(--dark);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-right: 1rem;
}

.feedback-submit-btn {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 4px 4px 0 var(--dark);
}

.feedback-submit-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--dark);
}

.feedback-skip-btn {
    background: #ffffff;
    color: var(--text);
    box-shadow: 4px 4px 0 var(--light);
}

.feedback-skip-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--light);
}

.helper-feedback-btn {
    padding: 0.75rem 1.5rem;
    background: #ffffff;
    border: 3px solid var(--dark);
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 3px 3px 0 rgba(15, 23, 42, 0.1);
}

.helper-feedback-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
    background: var(--primary);
    color: white;
}

.learning-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem 4rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 8rem 2rem 4rem;
}

.auth-section {
    max-width: 500px;
    margin: 0 auto 4rem;
}

.logout-btn {
    background: #dc2626;
    color: white;
    border: 3px solid #dc2626;
    box-shadow: 4px 4px 0 var(--dark);
    transition: all var(--timing-base) var(--ease-out-smooth);
}

.learning-heading {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

.learning-subheading {
    font-size: 1.15rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
}

.auth-card {
    background: #ffffff;
    padding: 3rem;
    border-radius: 0;
    box-shadow: 12px 12px 0 rgba(0, 0, 0, 0.2);
    border: 4px solid var(--dark);
    position: relative;
}

.auth-card::before {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    z-index: -1;
    opacity: 0.1;
}

.auth-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 2rem;
    background: transparent;
}

.auth-tab {
    flex: 1;
    padding: 1rem;
    border: 2px solid var(--dark);
    background: #f3f4f6;
    color: var(--text-light);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.auth-tab:first-child {
    border-right: none;
}

.auth-tab.active {
    color: #ffffff;
    background: var(--dark);
}

.auth-form, .form {
    display: grid;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.form-field {
    text-align: left;
}

.form-field label {
    display: block;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-field input, .form-field select, .form-field textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 2px solid var(--dark);
    border-radius: 0;
    font-size: 1rem;
    transition: all var(--timing-base) var(--ease-out-smooth);
    background: #ffffff;
    font-family: inherit;
    color: var(--text);
}

.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 4px 4px 0 rgba(99, 102, 241, 0.2);
    transform: translateY(-1px);
}

.form-field input:hover, .form-field select:hover, .form-field textarea:hover {
    border-color: rgba(99, 102, 241, 0.4);
}

.form-button, .action-btn.primary {
    width: 100%;
    padding: 1.25rem 2rem;
    font-size: 1rem;
    font-weight: 900;
    color: #ffffff;
    background: var(--primary);
    border: 4px solid var(--dark);
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    box-shadow: 8px 8px 0 var(--dark);
}

.form-button:hover, .action-btn.primary:hover {
    transform: translate(-3px, -3px);
    box-shadow: 11px 11px 0 var(--dark);
}

.form-button:active {
    transform: translate(4px, 4px);
    box-shadow: 4px 4px 0 var(--dark);
}

.form-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.auth-guest {
    width: 100%;
    padding: 1rem 1.5rem;
    margin-top: 1rem;
    background: #ffffff;
    border: 3px solid var(--dark);
    color: var(--text);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.9rem;
    box-shadow: 4px 4px 0 var(--dark);
}

.auth-guest:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--dark);
}

.auth-guest:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--dark);
}

.auth-feedback {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

.learning-intro {
    max-width: 600px;
    margin: 0 auto;
}

.topics-view {
    max-width: 1200px;
    margin: 0 auto;
}

.topics-heading {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 2.5rem;
    color: #8b5cf6;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

.topics-status, .content-status {
    font-size: 0.9rem;
    margin-top: 1rem;
    color: var(--text-light);
}

.topics-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 2rem;
}

.topic-item {
    display: block;
    width: 100%;
    background: #ffffff;
    border: 4px solid var(--dark);
    padding: 2rem;
    text-align: left;
    position: relative;
    cursor: pointer;
    font: inherit;
    appearance: none;
    -webkit-appearance: none;
    transition: all var(--timing-base) var(--ease-out-smooth);
    box-shadow: 6px 6px 0 var(--dark);
    overflow: hidden;
}

.topic-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.04), rgba(139, 92, 246, 0.04));
    opacity: 0;
    transition: opacity var(--timing-slow) var(--ease-out-smooth);
    pointer-events: none;
}

.topic-item:hover::before,
.topic-item:focus-visible::before {
    opacity: 1;
}

.topic-item:hover,
.topic-item:focus-visible {
    transform: translate(-3px, -3px);
    box-shadow: 9px 9px 0 var(--dark);
}

.topic-item:focus-visible {
    outline: none;
}

.topic-item:active {
    transform: translate(2px, 2px);
    box-shadow: 4px 4px 0 var(--dark);
}

.topic-item-title {
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--dark);
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.topic-item-preview {
    font-size: 0.95rem;
    line-height: 1.65;
    color: #555555;
    font-weight: 500;
    margin-top: 1.25rem;
}

.topic-item-preview ul {
    margin: 0;
    padding-left: 0;
    list-style: none;
}

.topic-item-preview li {
    margin-bottom: 0.9rem;
    position: relative;
    padding-left: 1.5rem;
}

.topic-item-preview li:last-child {
    margin-bottom: 0;
}

.topic-item-preview li::before {
    content: '▸';
    position: absolute;
    left: 0;
    font-weight: 900;
    color: #8b5cf6;
    font-size: 1.15rem;
}

.topic-item-learn-more {
    font-size: 0.85rem;
    font-weight: 600;
    color: #8b5cf6;
    margin-top: 1rem;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.topic-item:hover .topic-item-learn-more {
    opacity: 1;
}

.topic-item-number {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 3.6rem;
    font-weight: 900;
    color: rgba(0, 0, 0, 0.05);
    pointer-events: none;
}

.content-view {
    max-width: 1000px;
    margin: 0 auto;
    overflow: visible;
    position: relative;
}

.content {
    background: #ffffff;
    padding: 3rem;
    border: 3px solid var(--dark);
    border-radius: 0;
    line-height: 2;
    font-size: 1.1rem;
    box-shadow: 8px 8px 0 var(--light);
}

.content h1 {
    font-size: 2.75rem;
    font-weight: 900;
    margin-bottom: 2rem;
    color: #8b5cf6;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

.content h2 {
    font-size: 1.9rem;
    font-weight: 700;
    margin-top: 3.5rem;
    margin-bottom: 1.5rem;
    color: var(--text);
    text-transform: uppercase;
    border-bottom: 4px solid var(--primary);
    padding-bottom: 0.75rem;
    padding-left: 1rem;
    border-left: 6px solid var(--primary);
}

.content h3 {
    font-size: 1.45rem;
    font-weight: 700;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: #8b5cf6;
}

.content h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: #10b981;
}

.content p {
    margin-bottom: 1.5rem;
}

.content ul, .content ol {
    margin: 1.5rem 0 2rem 2rem;
    padding-left: 1.5rem;
}

.content li {
    margin-bottom: 1rem;
    line-height: 2;
}

.content strong {
    font-weight: 700;
    color: var(--primary);
}

.content em {
    font-style: italic;
    color: var(--text);
}

.content code {
    background: #f0f9ff;
    padding: 0.25rem 0.6rem;
    border: 2px solid #3b82f6;
    font-family: monospace;
    font-size: 0.95em;
    color: #1e40af;
}

.content pre {
    background: #1a1a2e;
    padding: 2rem;
    border: 3px solid var(--dark);
    overflow-x: auto;
    margin: 2rem 0;
    box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.1);
}

.content pre code {
    background: transparent;
    border: none;
    color: #10b981;
    padding: 0;
}

.content pre code {
    background: none;
    border: none;
    padding: 0;
}

.content-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.action-btn {
    padding: 1.5rem;
    border: 4px solid var(--dark);
    background: #f8fafc;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    transition: all var(--timing-base) var(--ease-out-smooth);
    font-weight: 700;
    box-shadow: 6px 6px 0 var(--dark);
    color: var(--dark);
    font-size: 1rem;
    justify-content: center;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    overflow: hidden;
    will-change: transform, box-shadow;
}

.action-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.03);
    transform: translateX(-100%);
    transition: transform var(--timing-slow) var(--ease-out-smooth);
}

.action-btn:hover::before {
    transform: translateX(0);
}

.action-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 8px 8px 0 var(--dark);
}

.action-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 4px 4px 0 var(--dark);
}

.action-btn svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.action-btn span {
    font-size: 1rem;
    font-weight: 700;
}

.action-btn--outline {
    background: #ffffff;
    color: var(--dark);
}

.action-btn--outline:hover {
    background: #f1f5f9;
}

.action-btn--danger {
    background: var(--red);
    border-color: var(--red);
    color: #ffffff;
}

.action-btn--danger:hover {
    background: #dc2626;
}

.action-btn--danger:active {
    background: #b91c1c;
}

.action-save {
    background: var(--green);
    border-color: var(--green);
}

.action-save:hover {
    background: #059669;
}

.action-quiz {
    background: var(--blue);
    border-color: var(--blue);
}

.action-quiz:hover {
    background: #2563eb;
}

.action-flashcard {
    background: #8b5cf6;
    border-color: #8b5cf6;
}

.action-flashcard:hover {
    background: #2563eb;
}

.action-export {
    background: var(--cyan);
    border-color: var(--cyan);
}

.action-export:hover {
    background: #0891b2;
}

.back-link {
    display: inline-block;
    margin-bottom: 2rem;
    padding: 0.85rem 1.75rem;
    color: var(--text);
    font-weight: 700;
    text-decoration: none;
    background: #ffffff;
    border: 3px solid var(--dark);
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.85rem;
    box-shadow: 4px 4px 0 var(--dark);
}

.back-link:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--dark);
}

.back-link:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--dark);
}

.community-view {
    max-width: 1400px;
    margin: 0 auto;
}

.community-heading {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    color: #10b981;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

.community-subtitle {
    font-size: 1.15rem;
    color: var(--text-light);
    margin-bottom: 3rem;
}

.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 1.5rem;
    margin-top: 0;
}

.group-card {
    background: #ffffff;
    border: 3px solid var(--dark);
    border-radius: 0;
    padding: 2rem;
    cursor: pointer;
    transition: all var(--timing-base) var(--ease-out-smooth);
    box-shadow: 6px 6px 0 var(--light);
    position: relative;
    overflow: hidden;
}

.group-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.03), rgba(6, 182, 212, 0.03));
    opacity: 0;
    transition: opacity var(--timing-slow) var(--ease-out-smooth);
    pointer-events: none;
}

.group-card:hover::before {
    opacity: 1;
}

.group-card:hover {
    transform: translate(-3px, -3px);
    box-shadow: 9px 9px 0 var(--light);
}

.group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.group-badges {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.group-topic-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: #ffffff;
    border-radius: 0;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.group-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text);
}

.group-membership {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.8rem;
    background: #bbf7d0;
    color: var(--dark);
    border: 2px solid var(--dark);
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    box-shadow: 3px 3px 0 var(--light);
}

.group-description {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 1.25rem;
    font-size: 1rem;
}

.group-meta {
    display: flex;
    gap: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

.group-date {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 0.65rem;
}

.group-detail-header {
    background: #ffffff;
    border: 3px solid var(--dark);
    border-radius: 0;
    padding: 2.5rem;
    margin-bottom: 2rem;
    box-shadow: 8px 8px 0 var(--light);
}

body:not(.is-authenticated) .pricing-page .nav {
    display: none;
}

body:not(.is-authenticated) .roadmap-page .nav {
    display: none;
}

.group-detail-description {
    margin: 1rem 0;
    color: #636366;
    line-height: 1.6;
}

.group-detail-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.discussion-card {
    background: #ffffff;
    border: 2px solid var(--dark);
    border-radius: 0;
    padding: 1.75rem;
    margin-bottom: 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 4px 4px 0 var(--light);
}

.discussion-card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--light);
}

.discussion-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 0.85rem;
}

.discussion-header h4 {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text);
}

.discussion-meta {
    font-size: 0.85rem;
    color: var(--text-light);
}

.discussion-preview {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.discussion-stats {
    font-size: 0.875rem;
    color: var(--text-light);
}

.discussion-toolbar {
    margin: 2.5rem 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.discussion-count {
    font-size: 0.85rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--dark);
}

.discussion-toolbar-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.discussion-toolbar-right label {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-light);
}

.discussion-toolbar-right select {
    border: 2px solid var(--dark);
    background: #ffffff;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0.45rem 1.1rem;
    cursor: pointer;
    outline: none;
    box-shadow: 4px 4px 0 var(--light);
    appearance: none;
}

.discussion-toolbar-right select:focus {
    box-shadow: 6px 6px 0 var(--light);
}

.back-to-discussions {
    margin-bottom: 1.5rem;
}

.discussion-detail {
    background: #ffffff;
    border: 3px solid var(--dark);
    padding: 2.5rem;
    box-shadow: 8px 8px 0 var(--light);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.discussion-detail h3 {
    font-size: 1.75rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -0.01em;
    color: var(--dark);
}

.discussion-detail-meta {
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.discussion-detail-body {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--text);
    letter-spacing: 0.01em;
}

.discussion-detail-body p {
    margin-bottom: 1rem;
}

.discussion-replies {
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.discussion-replies-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.discussion-replies-header h4 {
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--dark);
}

.reply-count-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: #ffd93d;
    color: var(--dark);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0.35rem 0.75rem;
    border: 2px solid var(--dark);
    box-shadow: 4px 4px 0 var(--light);
}

.reply-card {
    background: #ffffff;
    border: 2px solid var(--dark);
    padding: 1.5rem;
    box-shadow: 6px 6px 0 var(--light);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.reply-meta {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.reply-body {
    font-size: 0.95rem;
    color: var(--text);
    line-height: 1.6;
}

.reply-notice {
    background: #fef3c7;
    border: 2px solid var(--dark);
    padding: 1rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--dark);
    box-shadow: 6px 6px 0 var(--light);
}

.reply-composer {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: #ffffff;
    border: 3px solid var(--dark);
    padding: 1.75rem;
    box-shadow: 8px 8px 0 var(--light);
}

.reply-composer label {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text);
}

.reply-composer textarea {
    resize: vertical;
    min-height: 140px;
    border: 2px solid var(--dark);
    background: #ffffff;
    font-size: 1rem;
    line-height: 1.6;
    padding: 0.85rem 1rem;
    font-family: inherit;
}

.reply-composer button {
    width: max-content;
    padding: 0.85rem 1.75rem;
}

.reply-composer button[disabled] {
    cursor: not-allowed;
    opacity: 0.5;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 26, 46, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
    animation: fadeInBackdrop 0.3s ease;
}

@keyframes fadeInBackdrop {
    from {
        opacity: 0;
        backdrop-filter: blur(0px);
    }
    to {
        opacity: 1;
        backdrop-filter: blur(4px);
    }
}

.modal-content {
    background: #ffffff;
    border-radius: 0;
    padding: 3rem;
    max-width: 560px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    border: 3px solid var(--dark);
    box-shadow: 12px 12px 0 rgba(0, 0, 0, 0.3);
    /* Animation disabled - interferes with dynamic content loading in lessons modal */
    transform-origin: center;
}

.modal-content h2 {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 2rem;
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

.spinner {
    border: 4px solid var(--light);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 0.8s linear infinite;
    margin: 2rem auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-light);
}

.empty-state h3 {
    font-size: 1.5rem;
    color: var(--text);
    margin-bottom: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.close-btn {
    position: sticky;
    top: 1rem;
    background: var(--primary);
    color: #ffffff;
    border: none;
    width: 40px;
    height: 40px;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 700;
    z-index: 10;
    box-shadow: 4px 4px 0 var(--dark);
}

.close-btn:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--dark);
}

.quiz-header, .flashcard-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 3px solid var(--dark);
}

.quiz-meta, .flashcards-meta {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

.quiz-question {
    background: #ffffff;
    padding: 2rem;
    margin-bottom: 2rem;
    border: 3px solid var(--dark);
    box-shadow: 4px 4px 0 var(--light);
}

.quiz-question .question-text {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text);
    line-height: 1.6;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.quiz-option {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--light);
    border: 2px solid var(--dark);
    cursor: pointer;
    transition: all 0.2s;
}

.quiz-option:hover {
    background: #ffffff;
    transform: translateX(4px);
}

.quiz-option input[type="radio"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.quiz-option span {
    flex: 1;
    font-size: 1rem;
    line-height: 1.5;
}

.quiz-explanation {
    margin-top: 1rem;
    padding: 1rem;
    background: #e0f2fe;
    border-left: 4px solid #0284c7;
    font-size: 0.95rem;
    line-height: 1.6;
}

.quiz-question.correct {
    border-color: #10b981;
}

.quiz-question.incorrect {
    border-color: var(--red);
}

.flashcard-deck {
    max-width: 700px;
    margin: 0 auto;
}

.flashcard-card {
    width: 100%;
    height: 450px;
    cursor: pointer;
    margin-bottom: 1.5rem;
    position: relative;
}

.flashcard-inner {
    width: 100%;
    height: 100%;
    position: relative;
}

.flashcard-inner.flipped .flashcard-front {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
}

.flashcard-inner.flipped .flashcard-back {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.flashcard-face {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 3rem;
    background: #ffffff;
    border: 5px solid var(--dark);
    box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.15);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.flashcard-front {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    z-index: 2;
}

.flashcard-back {
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 1;
    background: #F5F5F7;
}

.flashcard-label {
    position: absolute;
    top: 2rem;
    left: 2rem;
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--text-light);
    letter-spacing: 0.15em;
    padding: 0.5rem 1rem;
    background: var(--dark);
    color: #fff;
}

.flashcard-content {
    font-size: 1.35rem;
    line-height: 1.8;
    text-align: center;
    color: var(--text);
    font-weight: 500;
}

.flashcard-hint {
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--primary);
    opacity: 0.8;
}

.flashcard-hint-text {
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

.flashcard-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
}

.flashcard-controls .action-btn {
    padding: 1rem 2rem;
    background: #8b5cf6;
    color: #ffffff;
    border: 3px solid var(--dark);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 5px 5px 0 var(--dark);
    font-size: 0.95rem;
}

.flashcard-controls .action-btn:hover:not(:disabled) {
    transform: translate(-2px, -2px);
    box-shadow: 7px 7px 0 var(--dark);
}

.flashcard-controls .action-btn:active:not(:disabled) {
    transform: translate(2px, 2px);
    box-shadow: 3px 3px 0 var(--dark);
}

.flashcard-controls .action-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    background: var(--light);
    color: var(--text-light);
}

.flashcard-counter {
    font-size: 1.1rem;
    font-weight: 900;
    color: var(--text);
    padding: 0.5rem 1.5rem;
    background: var(--light);
    border: 3px solid var(--dark);
}

.dashboard-view {
    max-width: 1200px;
    margin: 0 auto;
}

.dashboard-heading {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 2.5rem;
    color: var(--orange);
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.dashboard-card {
    background: #ffffff;
    padding: 2rem;
    border-radius: 0;
    border: 3px solid var(--dark);
    box-shadow: 6px 6px 0 var(--light);
    transition: all 0.3s;
}

.dashboard-card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 8px 8px 0 var(--light);
}

.dashboard-card:nth-child(1) {
    border-left: 6px solid var(--blue);
}

.dashboard-card:nth-child(1) .dashboard-number {
    color: var(--blue);
}

.dashboard-card:nth-child(1) .dashboard-bar-fill {
    background: var(--blue);
}

.dashboard-card:nth-child(2) {
    border-left: 6px solid var(--green);
}

.dashboard-card:nth-child(2) .dashboard-number {
    color: var(--green);
}

.dashboard-card:nth-child(2) .dashboard-bar-fill {
    background: var(--green);
}

.dashboard-card:nth-child(3) {
    border-left: 6px solid var(--purple);
}

.dashboard-card:nth-child(3) .dashboard-number {
    color: #8b5cf6;
}

.dashboard-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.dashboard-card h3 {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.dashboard-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
}

.dashboard-bar {
    height: 12px;
    background: var(--light);
    border: 2px solid var(--dark);
    border-radius: 0;
    overflow: hidden;
}

.dashboard-bar-fill {
    height: 100%;
    background: var(--primary);
    transition: width 0.6s;
}

.dashboard-recent {
    margin-top: 2.5rem;
}

.dashboard-recent h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text);
    text-transform: uppercase;
}

.dashboard-mastery,
.dashboard-struggling,
.dashboard-insights,
.dashboard-cognitive {
    background: white;
    border: 4px solid var(--dark);
    box-shadow: 6px 6px 0 var(--dark);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.dashboard-mastery h3,
.dashboard-struggling h3,
.dashboard-insights h3,
.dashboard-cognitive h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--dark);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.activity-list {
    display: grid;
    gap: 1rem;
}

.activity-item {
    display: flex;
    justify-content: space-between;
    padding: 1.5rem;
    background: var(--light);
    border: 2px solid var(--dark);
    border-radius: 0;
}

.activity-topic {
    font-weight: 700;
    color: var(--text);
}

.activity-time {
    font-size: 0.875rem;
    color: var(--text-light);
}

.reminder-card {
    background: #ffffff;
    padding: 2rem;
    border: 3px solid var(--dark);
    border-radius: 0;
    margin-bottom: 2.5rem;
    box-shadow: 6px 6px 0 var(--light);
}

.reminder-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text);
    text-transform: uppercase;
}

.reminder-card p {
    color: var(--text-light);
    margin-bottom: 1.25rem;
    font-size: 1rem;
}

.reminder-settings {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.reminder-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.reminder-time {
    padding: 0.65rem 1rem;
    background: #ffffff;
    border: 2px solid var(--dark);
    border-radius: 0;
    font-size: 0.95rem;
}

.mindwarp {
    position: fixed;
    top: 0;
    right: -480px;
    width: 480px;
    height: 100vh;
    background: var(--dark);
    border-left: 4px solid var(--primary);
    transition: right 0.3s ease;
    z-index: 200;
    padding: 2.5rem;
    overflow-y: auto;
}

.mindwarp.active {
    right: 0;
}

.mindwarp-close {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #ffffff;
}

.mindwarp-heading {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    color: #06b6d4;
    text-transform: uppercase;
}

.mindwarp-subtitle {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 2.5rem;
}

.mindwarp-chat {
    min-height: 300px;
    margin-bottom: 2rem;
}

.chat-empty {
    text-align: center;
    padding: 3rem 1rem;
    color: rgba(255, 255, 255, 0.6);
}

.mindwarp-input {
    display: flex;
    gap: 0.75rem;
}

.mindwarp-input input {
    flex: 1;
    padding: 0.85rem 1rem;
    border: 2px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
    border-radius: 0;
    color: #ffffff;
}

.mindwarp-input button {
    padding: 0.85rem 1.75rem;
    background: var(--primary);
    color: #ffffff;
    border: none;
    border-radius: 0;
    cursor: pointer;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.roadmap {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem;
}

.roadmap-heading {
    font-size: 3.5rem;
    font-weight: 900;
    text-align: center;
    margin-bottom: 0.75rem;
    color: #ff6b35;
    text-transform: uppercase;
    letter-spacing: -0.03em;
}

.roadmap-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 4rem;
}

.roadmap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.roadmap-item {
    background: #ffffff;
    border: 3px solid var(--dark);
    border-radius: 0;
    padding: 2rem;
    transition: all 0.3s;
    box-shadow: 6px 6px 0 var(--light);
}

.roadmap-item:hover {
    transform: translate(-3px, -3px);
    box-shadow: 9px 9px 0 var(--light);
}

.roadmap-item h3 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 0.85rem;
    color: var(--text);
}

.roadmap-item p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: 1rem;
}

.roadmap-status {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 0;
    font-size: 0.7rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: 2px solid var(--dark);
}

.roadmap-item.live .roadmap-status {
    background: #10b981;
    color: #ffffff;
    border-color: #10b981;
}

.roadmap-item.live .roadmap-status::before {
    content: "✓ Live";
}

.roadmap-item.in-progress .roadmap-status {
    background: #8b5cf6;
    color: #ffffff;
    border-color: #8b5cf6;
}

.roadmap-item.in-progress .roadmap-status::before {
    content: "⚡ In Progress";
}

.roadmap-item.planned .roadmap-status {
    background: transparent;
    color: var(--text-light);
}

.roadmap-item.planned .roadmap-status::before {
    content: "📋 Planned";
}

.roadmap-item.quiz-flashcard .roadmap-status {
    background: #ffd93d;
    color: var(--dark);
    border-color: #ffd93d;
}

.roadmap-item.quiz-flashcard .roadmap-status::before {
    content: "🎯 Beta";
}

.roadmap-item.scrapped .roadmap-status {
    background: #ef4444;
    color: #ffffff;
    border-color: #ef4444;
}

.roadmap-item.scrapped .roadmap-status::before {
    content: "❌ Scrapped";
}

.roadmap-legend {
    display: flex;
    gap: 2.5rem;
    justify-content: center;
    padding: 2rem;
    background: var(--light);
    border: 3px solid var(--dark);
    border-radius: 0;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
}

.legend-dot {
    width: 16px;
    height: 16px;
    border-radius: 0;
    border: 2px solid var(--dark);
}

.legend-dot.live {
    background: #10b981;
}

.legend-dot.in-progress {
    background: #8b5cf6;
}

.legend-dot.beta {
    background: #ffd93d;
}

.legend-dot.planned {
    background: #9ca3af;
}

.legend-dot.scrapped {
    background: #ef4444;
}

.subscription-tier {
    position: relative;
    padding: 2.5rem;
}

.subscription-tier .tier-badge {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: var(--dark);
    color: #ffffff;
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.tier-kickstarter .tier-badge {
    background: #10b981;
}

.tier-boost .tier-badge {
    background: #ff6b35;
}

.tier-max .tier-badge {
    background: var(--primary);
}

.tier-ultra .tier-badge {
    background: #8b5cf6;
}

.tier-description {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.tier-perks {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tier-perks li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--light);
    font-size: 0.95rem;
    line-height: 1.5;
}

.tier-perks li:last-child {
    border-bottom: none;
}

.pricing {
    max-width: 1400px;
    margin: 0 auto;
    padding: 6rem 2rem;
}

.pricing-heading {
    font-size: 3.5rem;
    font-weight: 900;
    text-align: center;
    margin-bottom: 0.75rem;
    color: #ff6b35;
    text-transform: uppercase;
    letter-spacing: -0.03em;
}

.pricing-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 4rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 5rem;
}

.pricing-card {
    background: #ffffff;
    border: 3px solid var(--dark);
    border-radius: 0;
    padding: 2.5rem;
    position: relative;
    transition: all 0.3s;
    box-shadow: 6px 6px 0 var(--light);
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    transform: translate(-3px, -3px);
    box-shadow: 9px 9px 0 var(--light);
}

.pricing-card.featured {
    border-color: #ff6b35;
    border-width: 4px;
    box-shadow: 8px 8px 0 rgba(255, 107, 53, 0.2);
}

.pricing-card.featured:hover {
    box-shadow: 12px 12px 0 rgba(255, 107, 53, 0.3);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    right: 2rem;
    background: var(--dark);
    color: #ffffff;
    padding: 0.5rem 1rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: 2px solid var(--dark);
}

.tier-kickstarter .pricing-badge {
    background: #10b981;
    border-color: #10b981;
}

.tier-boost .pricing-badge {
    background: #ff6b35;
    border-color: #ff6b35;
}

.tier-max .pricing-badge {
    background: #8b5cf6;
    border-color: #8b5cf6;
}

.tier-ultra .pricing-badge {
    background: var(--dark);
    border-color: var(--dark);
}

.pricing-tier-name {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
    margin-top: 0.5rem;
    color: var(--text);
    text-transform: uppercase;
}

.pricing-price {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--light);
}

.price-amount {
    font-size: 3.5rem;
    font-weight: 900;
    color: #ff6b35;
    line-height: 1;
}

.price-period {
    font-size: 1rem;
    color: var(--text-light);
    font-weight: 500;
}

.pricing-description {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 0 0 2rem 0;
    flex-grow: 1;
}

.pricing-features li {
    padding: 0.75rem 0;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text);
}

.pricing-button {
    width: 100%;
    padding: 1.25rem 2rem;
    font-size: 1rem;
    font-weight: 700;
    text-align: center;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 3px solid var(--dark);
    transition: all 0.2s;
    display: block;
    margin-top: auto;
}

.pricing-button.primary {
    background: #ff6b35;
    color: #ffffff;
    box-shadow: 6px 6px 0 var(--dark);
}

.pricing-button.primary:hover {
    transform: translate(3px, 3px);
    box-shadow: 3px 3px 0 var(--dark);
}

.pricing-button.secondary {
    background: #ffffff;
    color: var(--text);
}

.pricing-button.secondary:hover {
    background: var(--light);
}

.pricing-faq {
    margin-bottom: 5rem;
}

.pricing-faq h3 {
    font-size: 2.5rem;
    font-weight: 900;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text);
    text-transform: uppercase;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.faq-item {
    background: var(--light);
    padding: 2rem;
    border: 2px solid var(--dark);
}

.faq-item h4 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text);
}

.faq-item p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-light);
    margin: 0;
}

.pricing-cta {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--light);
    border: 3px solid var(--dark);
    box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.1);
}

.pricing-cta h3 {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 1rem;
    color: var(--text);
    text-transform: uppercase;
}

.pricing-cta p {
    font-size: 1.15rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.features-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem;
}

.features-heading {
    font-size: 3.5rem;
    font-weight: 900;
    text-align: center;
    margin-bottom: 0.75rem;
    color: #ff6b35;
    text-transform: uppercase;
    letter-spacing: -0.03em;
}

.features-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 4rem;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    margin-bottom: 5rem;
}

.feature-detail {
    background: #ffffff;
    border: 3px solid var(--dark);
    padding: 2.5rem;
    box-shadow: 6px 6px 0 var(--light);
    transition: all 0.3s;
}

.feature-detail:hover {
    transform: translate(-2px, -2px);
    box-shadow: 8px 8px 0 var(--light);
}

.feature-detail-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-detail h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text);
    text-transform: uppercase;
}

.feature-detail-desc {
    font-size: 1.15rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-style: italic;
}

.feature-detail-content p {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text);
    margin-bottom: 1rem;
}

.feature-detail-content ul {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0;
}

.feature-detail-content li {
    padding: 0.75rem 0;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text);
    border-bottom: 1px solid var(--light);
}

.feature-detail-content li:last-child {
    border-bottom: none;
}

.feature-detail-content strong {
    color: var(--primary);
    font-weight: 700;
}

.feature-availability {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--light);
    font-size: 0.9rem;
    color: var(--text-light);
}

.tier-badge-small {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 2px solid;
    margin-left: 0.5rem;
}

.tier-badge-small.free {
    background: #10b981;
    color: #ffffff;
    border-color: #10b981;
}

.tier-badge-small.boost {
    background: #ff6b35;
    color: #ffffff;
    border-color: #ff6b35;
}

.tier-badge-small.max {
    background: #8b5cf6;
    color: #ffffff;
    border-color: #8b5cf6;
}

.tier-badge-small.ultra {
    background: var(--dark);
    color: #ffffff;
    border-color: var(--dark);
}

.features-cta {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--light);
    border: 3px solid var(--dark);
    box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.1);
}

.features-cta h3 {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 1rem;
    color: var(--text);
    text-transform: uppercase;
}

.features-cta p {
    font-size: 1.15rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.mindwarp-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.mindwarp-hero {
    text-align: center;
    margin-bottom: 4rem;
}

.mindwarp-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.mindwarp-heading {
    font-size: 3.5rem;
    font-weight: 900;
    color: #8b5cf6;
    text-transform: uppercase;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.mindwarp-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.mindwarp-intro {
    background: var(--light);
    padding: 2.5rem;
    border: 3px solid var(--dark);
    margin-bottom: 3rem;
}

.mindwarp-intro h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text);
    text-transform: uppercase;
}

.mindwarp-intro p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text);
}

.mindwarp-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.mindwarp-feature-card {
    background: #ffffff;
    border: 3px solid var(--dark);
    padding: 2rem;
    transition: all 0.3s;
    box-shadow: 4px 4px 0 var(--light);
}

.mindwarp-feature-card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--light);
}

.mindwarp-feature-card .feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.mindwarp-feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text);
}

.mindwarp-feature-card p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-light);
}

.mindwarp-tools {
    margin-bottom: 4rem;
}

.mindwarp-tools > h2 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 2rem;
    color: var(--text);
    text-transform: uppercase;
}

.tool-section {
    background: #ffffff;
    border: 3px solid var(--dark);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 4px 4px 0 var(--light);
}

.tool-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text);
}

.tool-description {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.mindwarp-textarea {
    width: 100%;
    min-height: 200px;
    padding: 1rem;
    border: 2px solid var(--dark);
    font-size: 1rem;
    font-family: inherit;
    line-height: 1.6;
    resize: vertical;
    margin-bottom: 1rem;
}

.mindwarp-textarea:focus {
    outline: none;
    border-color: #8b5cf6;
}

.mindwarp-save-btn {
    padding: 0.85rem 2rem;
    background: #8b5cf6;
    color: #ffffff;
    border: none;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 4px 4px 0 var(--dark);
}

.mindwarp-save-btn:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--dark);
}

.save-status {
    margin-top: 0.75rem;
    font-size: 0.9rem;
    font-weight: 600;
}

.save-status.success {
    color: #10b981;
}

.save-status.error {
    color: #ef4444;
}

.mood-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
}

.mood-btn {
    padding: 1.5rem 1rem;
    background: var(--light);
    border: 2px solid var(--dark);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.mood-btn:hover {
    background: #ffffff;
    transform: translateY(-2px);
}

.mood-btn.selected {
    background: #8b5cf6;
    border-color: #8b5cf6;
}

.mood-btn.selected .mood-emoji,
.mood-btn.selected .mood-label {
    filter: brightness(0) invert(1);
}

.mood-emoji {
    font-size: 2rem;
}

.mood-label {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.prompts-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.prompt-btn {
    padding: 1rem 1.5rem;
    background: var(--light);
    border: 2px solid var(--dark);
    text-align: left;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
}

.prompt-btn:hover {
    background: #ffffff;
    transform: translateX(4px);
}

.goal-input-group {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.goal-input {
    flex: 1;
    padding: 0.85rem 1rem;
    border: 2px solid var(--dark);
    font-size: 1rem;
}

.goal-input:focus {
    outline: none;
    border-color: #8b5cf6;
}

.add-goal-btn {
    padding: 0.85rem 1.5rem;
    background: #8b5cf6;
    color: #ffffff;
    border: none;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.add-goal-btn:hover {
    background: #7c3aed;
}

.goals-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.goal-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--light);
    border: 2px solid var(--dark);
}

.goal-item.completed {
    opacity: 0.6;
}

.goal-item.completed .goal-text {
    text-decoration: line-through;
}

.goal-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.goal-text {
    flex: 1;
    font-size: 1rem;
}

.delete-goal-btn {
    background: transparent;
    border: none;
    color: #ef4444;
    font-size: 1.25rem;
    font-weight: 700;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    transition: all 0.2s;
}

.delete-goal-btn:hover {
    background: #ef4444;
    color: #ffffff;
}

.empty-goals {
    text-align: center;
    color: var(--text-light);
    font-style: italic;
    padding: 2rem;
}

.mindwarp-resources {
    background: #fff7ed;
    border: 3px solid var(--dark);
    padding: 2.5rem;
}

.mindwarp-resources h2 {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 1rem;
    color: var(--text);
    text-transform: uppercase;
}

.mindwarp-resources > p {
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 2rem;
    color: var(--text);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.resource-card {
    background: #ffffff;
    padding: 1.5rem;
    border: 2px solid var(--dark);
}

.resource-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.resource-card p {
    font-size: 1.05rem;
    font-weight: 600;
    color: #ef4444;
    margin-bottom: 0.25rem;
}

.resource-note {
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--text-light);
    margin-top: 0.5rem;
}

.lessons-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.lessons-header h1 {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: -0.02em;
    margin: 0;
}

.lessons-filters {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.search-input {
    padding: 0.75rem 1rem;
    border: 2px solid var(--dark);
    background: #ffffff;
    font-size: 0.95rem;
    min-width: 200px;
}

.filter-select {
    padding: 0.75rem 1rem;
    border: 2px solid var(--dark);
    background: #ffffff;
    font-size: 0.95rem;
    cursor: pointer;
}

.lessons-grid {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.subject-section {
    width: 100%;
}

.subject-header {
    font-size: 1.75rem;
    font-weight: 900;
    color: var(--primary);
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 3px solid var(--dark);
}

.subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.lesson-card {
    background: #ffffff;
    border: 4px solid var(--dark);
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 6px 6px 0 var(--dark);
    position: relative;
}

.lesson-card:hover {
    transform: translate(-3px, -3px);
    box-shadow: 9px 9px 0 var(--dark);
}

.lesson-card:active {
    transform: translate(2px, 2px);
    box-shadow: 4px 4px 0 var(--dark);
}

.lesson-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text);
}

.lesson-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.meta-tag {
    font-weight: 600;
}

.meta-date {
    opacity: 0.7;
}

.lesson-preview {
    color: var(--text);
    line-height: 1.6;
    font-size: 0.95rem;
}

.completed-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: #10b981;
    color: #ffffff;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 700;
}


.modal-content {
    background: #ffffff;
    max-width: 900px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    border: 4px solid var(--dark);
    box-shadow: 12px 12px 0 rgba(0, 0, 0, 0.3);
    margin: 2rem auto;
}

.lesson-modal {
    padding: 2.5rem;
}

@media (max-width: 768px) {
    .lesson-modal {
        padding: 1.5rem;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 3px solid var(--dark);
    gap: 1.5rem;
    flex-wrap: wrap;
}

.modal-header h2 {
    font-size: 1.75rem;
    font-weight: 900;
    color: var(--primary);
    text-transform: uppercase;
    margin: 0;
    flex: 1;
    min-width: 200px;
    word-break: break-word;
}

.modal-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.icon-btn {
    min-width: 44px;
    height: 44px;
    border: 3px solid var(--dark);
    background: #ffffff;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 14px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dark);
    padding: 10px;
    box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.1);
}

.icon-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.15);
}

.icon-btn svg {
    width: 18px;
    height: 18px;
}

#generateQuizBtn {
    background: var(--blue);
    border-color: var(--blue);
    color: #ffffff;
}

#generateQuizBtn:hover {
    background: #2563eb;
}

#generateFlashcardsBtn {
    background: #8b5cf6;
    border-color: #8b5cf6;
    color: #ffffff;
}

#generateFlashcardsBtn:hover {
    background: #7c3aed;
}

#exportPdfBtn {
    background: var(--cyan);
    border-color: var(--cyan);
    color: #ffffff;
}

#exportPdfBtn:hover {
    background: #0891b2;
}

#markCompleteBtn {
    background: var(--green);
    border-color: var(--green);
    color: #ffffff;
}

#markCompleteBtn:hover {
    background: #059669;
}

#closeModalBtn {
    background: var(--red);
    border-color: var(--red);
    color: #ffffff;
}

#closeModalBtn:hover {
    background: #dc2626;
}

.modal-meta {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    flex-wrap: wrap;
    color: var(--text-light);
}

.lesson-content {
    line-height: 2;
    font-size: 1.1rem;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.lesson-content h1 {
    font-size: 2.75rem;
    font-weight: 900;
    margin-bottom: 2rem;
    color: #8b5cf6;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

.lesson-content h2 {
    font-size: 1.9rem;
    font-weight: 700;
    margin-top: 3.5rem;
    margin-bottom: 1.5rem;
    color: var(--text);
    text-transform: uppercase;
    border-bottom: 4px solid var(--primary);
    padding-bottom: 0.75rem;
    padding-left: 1rem;
    border-left: 6px solid var(--primary);
}

.lesson-content h3 {
    font-size: 1.45rem;
    font-weight: 700;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: #8b5cf6;
}

.lesson-content h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: #10b981;
}

.lesson-content p {
    margin-bottom: 1.5rem;
}

.lesson-content ul, .lesson-content ol {
    margin: 1.5rem 0 2rem 2rem;
    padding-left: 1.5rem;
}

.lesson-content li {
    margin-bottom: 1rem;
    line-height: 2;
}

.lesson-content strong {
    font-weight: 700;
    color: var(--primary);
}

.lesson-content em {
    font-style: italic;
    color: var(--text);
}

.lesson-content code {
    background: #f0f9ff;
    padding: 0.25rem 0.6rem;
    border: 2px solid #3b82f6;
    font-family: monospace;
    font-size: 0.95em;
    color: #1e40af;
}

.lesson-content pre {
    background: #1a1a2e;
    padding: 2rem;
    border: 3px solid var(--dark);
    overflow-x: auto;
    margin: 2rem 0;
    box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.1);
}

.lesson-content pre code {
    background: transparent;
    border: none;
    color: #10b981;
    padding: 0;
}

.lesson-content img {
    max-width: 100%;
    height: auto;
}

.lesson-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.lesson-content table td,
.lesson-content table th {
    border: 2px solid var(--dark);
    padding: 0.75rem;
}

.loading-state {
    text-align: center;
    padding: 4rem 2rem;
}

.primary-btn, .secondary-btn {
    padding: 1rem 2rem;
    border: 3px solid var(--dark);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 700;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 5px 5px 0 var(--dark);
}

.primary-btn {
    background: var(--primary);
    color: #ffffff;
}

.primary-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 7px 7px 0 var(--dark);
}

.primary-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 3px 3px 0 var(--dark);
}

.secondary-btn {
    background: #ffffff;
    color: var(--text);
}

.secondary-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 7px 7px 0 var(--dark);
}

.secondary-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 3px 3px 0 var(--dark);
}

.quiz-section, .flashcards-section {
    margin-top: 3rem;
    padding-top: 2.5rem;
    border-top: 3px solid var(--dark);
}

.quiz-section h3, .flashcards-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text);
    text-transform: uppercase;
}

.helper-header {
    text-align: center;
    margin-bottom: 4rem;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(16, 185, 129, 0.05) 100%);
    border: 3px solid var(--dark);
    box-shadow: 8px 8px 0 var(--light);
}

.helper-header h1 {
    font-size: 3.5rem;
    font-weight: 900;
    color: #10b981;
    text-transform: uppercase;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.helper-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.helper-info-notice {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 2rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border: 3px solid var(--primary);
    box-shadow: 4px 4px 0 rgba(99, 102, 241, 0.2);
    transition: all 0.2s;
}

.helper-info-notice:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 rgba(99, 102, 241, 0.3);
}

.helper-info-notice p {
    margin: 0;
    font-size: 1rem;
    color: var(--text);
    font-weight: 600;
}

.beta-notice {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 2rem;
    background: #ffd93d;
    border: 3px solid var(--dark);
    box-shadow: 4px 4px 0 var(--dark);
    transition: all 0.2s;
}

.beta-notice:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--dark);
}

.beta-notice .beta-badge {
    background: var(--dark);
    color: #ffd93d;
    padding: 0.4rem 0.8rem;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    border-radius: 3px;
}

.beta-notice p {
    margin: 0;
    font-size: 1rem;
    color: var(--dark);
    font-weight: 600;
}

.helper-container {
    max-width: 1000px;
    margin: 0 auto 4rem;
    display: grid;
    gap: 2.5rem;
}

.helper-input-section,
.helper-output-section {
    background: #ffffff;
    padding: 2.5rem;
    border: 4px solid var(--dark);
    box-shadow: 10px 10px 0 rgba(15, 23, 42, 0.08);
    transition: all 0.3s;
}

.helper-input-section:hover,
.helper-output-section:hover {
    box-shadow: 12px 12px 0 rgba(15, 23, 42, 0.12);
    transform: translate(-2px, -2px);
}

.helper-input-section h2,
.helper-output-section h2 {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 1.75rem;
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: -0.01em;
    border-bottom: 3px solid var(--primary);
    padding-bottom: 0.75rem;
}

.helper-textarea {
    width: 100%;
    min-height: 220px;
    padding: 1.25rem;
    border: 3px solid var(--dark);
    font-size: 1.05rem;
    font-family: inherit;
    line-height: 1.7;
    resize: vertical;
    margin-bottom: 1.5rem;
    background: #fafafa;
    transition: all 0.2s;
}

.helper-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 6px 6px 0 rgba(99, 102, 241, 0.15);
    background: #ffffff;
    transform: translate(-2px, -2px);
}

.helper-solve-btn {
    width: 100%;
    padding: 1.25rem 2rem;
    background: var(--primary);
    color: #ffffff;
    border: none;
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 6px 6px 0 var(--dark);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.helper-solve-btn:hover:not(:disabled) {
    transform: translate(3px, 3px);
    box-shadow: 3px 3px 0 var(--dark);
}

.helper-solve-btn:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-beta {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.15rem 0.5rem;
    border-radius: 3px;
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.1em;
}

.helper-clear-btn {
    width: 100%;
    padding: 1rem 1.5rem;
    background: var(--light);
    color: var(--text);
    border: 2px solid var(--dark);
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.helper-clear-btn:hover {
    background: var(--dark);
    color: #ffffff;
}

.helper-clear-btn .btn-beta {
    background: rgba(15, 23, 42, 0.1);
    color: var(--text);
}

.helper-clear-btn:hover .btn-beta {
    background: rgba(255, 255, 255, 0.2);
    color: #ffffff;
}

.helper-solution {
    line-height: 1.9;
    font-size: 1.1rem;
    background: #fafafa;
    padding: 2rem;
    border: 2px solid var(--light);
    border-radius: 8px;
}

.helper-solution h1,
.helper-solution h2,
.helper-solution h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.helper-solution h1 {
    font-size: 1.75rem;
    color: var(--primary);
}

.helper-solution h2 {
    font-size: 1.4rem;
    color: var(--blue);
}

.helper-solution h3 {
    font-size: 1.15rem;
    color: var(--green);
}

.helper-solution strong {
    color: #ff6b35;
    font-weight: 700;
}

.helper-solution code {
    background: #f0f9ff;
    padding: 0.2rem 0.5rem;
    border: 2px solid #3b82f6;
    font-family: monospace;
    font-size: 0.95em;
    color: #1e40af;
}

.helper-loading {
    text-align: center;
    padding: 4rem;
    background: #ffffff;
    border: 4px solid var(--dark);
    box-shadow: 10px 10px 0 rgba(15, 23, 42, 0.08);
}

.helper-loading p {
    margin-top: 1.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
}

.helper-examples {
    max-width: 1000px;
    margin: 0 auto;
    padding: 3rem 0;
}

.helper-examples h3 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 2rem;
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: -0.01em;
    text-align: center;
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
}

.example-card {
    background: #ffffff;
    padding: 2rem;
    border: 3px solid var(--dark);
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 6px 6px 0 rgba(15, 23, 42, 0.08);
}

.example-card:hover {
    transform: translate(-3px, -3px);
    box-shadow: 9px 9px 0 rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
}

.example-card h4 {
    font-size: 0.95rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 0.75rem;
    letter-spacing: 0.05em;
}

.example-card p {
    font-size: 1rem;
    color: var(--text);
    margin: 0;
    line-height: 1.5;
    font-weight: 500;
}

.profile-page {
    background: var(--light);
}

.profile-main {
    max-width: 1100px;
    margin: 120px auto 80px auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 2.5rem;
}

.profile-summary {
    background: #ffffff;
    border: 3px solid var(--dark);
    box-shadow: 10px 10px 0 rgba(15, 23, 42, 0.15);
    padding: 2.5rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.profile-preview {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.profile-avatar {
    --accent-color: #ffd93d;
    width: 96px;
    height: 96px;
    border-radius: 0;
    border: 4px solid var(--dark);
    box-shadow: 8px 8px 0 rgba(15, 23, 42, 0.15);
    background: #ffffff;
    position: relative;
    display: grid;
    place-items: center;
    padding: 0.5rem;
    overflow: visible;
}

.profile-avatar::after {
    content: '';
    position: absolute;
    left: 8px;
    right: 8px;
    bottom: -14px;
    height: 14px;
    background: var(--accent-color);
    border: 3px solid var(--dark);
    pointer-events: none;
    z-index: -1;
    box-shadow: 6px 6px 0 rgba(15, 23, 42, 0.2);
}

.profile-avatar img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 0;
}

.profile-text {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.profile-display {
    font-size: 1.75rem;
    font-weight: 900;
    color: var(--dark);
}

.profile-username {
    font-family: 'Inter', sans-serif;
    text-transform: lowercase;
    letter-spacing: 0.05em;
    color: var(--text-light);
    font-weight: 600;
}

.profile-hint {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-light);
}

.profile-form-wrapper {
    background: #ffffff;
    border: 3px solid var(--dark);
    box-shadow: 10px 10px 0 rgba(15, 23, 42, 0.15);
    padding: 2.5rem 2rem;
}

.profile-form {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.form-grid.two-column {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
}

.form-grid.two-column .form-field input {
    font-size: 1.05rem;
    font-weight: 600;
}

.field-help {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 0.35rem;
}

.form-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-section > h2 {
    font-size: 1.25rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--dark);
}

.avatar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
    gap: 1.25rem;
}

.avatar-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.75rem;
    border: 3px solid var(--dark);
    background: #ffffff;
    border-radius: 0;
    box-shadow: 6px 6px 0 rgba(15, 23, 42, 0.1);
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
}

.avatar-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.avatar-option img {
    width: 72px;
    height: 72px;
    object-fit: contain;
}

.avatar-option.selected {
    transform: translate(-3px, -3px);
    box-shadow: 10px 10px 0 rgba(15, 23, 42, 0.15);
    border-color: #8b5cf6;
    border-width: 4px;
}

.avatar-option:hover {
    transform: translate(-3px, -3px);
    box-shadow: 10px 10px 0 rgba(15, 23, 42, 0.15);
}

.accent-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(72px, 1fr));
    gap: 1rem;
}

.accent-option {
    width: 100%;
    padding: 1.1rem 0;
    border: 3px solid var(--dark);
    border-radius: 0;
    background: var(--accent-color, #2563eb);
    color: #ffffff;
    font-weight: 700;
    letter-spacing: 0.05em;
    cursor: pointer;
    box-shadow: 6px 6px 0 rgba(15, 23, 42, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.accent-option.selected,
.accent-option:hover {
    transform: translate(-3px, -3px);
    box-shadow: 10px 10px 0 rgba(15, 23, 42, 0.15);
}

.profile-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.profile-status {
    font-size: 0.95rem;
    min-height: 1.4rem;
}

.profile-status.success {
    color: var(--green);
}

.profile-status.error {
    color: var(--red);
}

.profile-form .primary-btn[disabled] {
    opacity: 0.6;
    cursor: wait;
}

@media (max-width: 1200px) {
    .profile-main {
        grid-template-columns: 1fr;
    }

    .profile-summary {
        order: 2;
    }

    .profile-form-wrapper {
        order: 1;
    }

    .topics-list {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    }
    
    .subject-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    body {
        font-size: 15px;
    }
    
    .hero-content {
        padding: 6rem 1.5rem 3rem;
    }

    .hero-badge {
        font-size: 0.75rem;
        padding: 0.6rem 1.2rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
        padding: 1.5rem;
    }

    .stat-divider {
        width: 60%;
        height: 2px;
    }

    .hero-cta {
        flex-direction: column;
        gap: 0.75rem;
    }

    .hero-button {
        width: 100%;
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .feature-card {
        padding: 1.75rem;
    }

    .hero-cta-final {
        padding: 4rem 1.5rem;
    }
    
    .profile-main {
        margin: 110px auto 60px auto;
        padding: 0 1.25rem;
        gap: 2rem;
    }

    .profile-preview {
        flex-direction: row;
        align-items: center;
    }

    .profile-avatar {
        width: 84px;
        height: 84px;
    }

    .form-grid.two-column {
        grid-template-columns: 1fr;
    }

    .nav-container {
        padding: 1rem;
    }

    .auth-tabs {
        justify-content: center;
        max-width: 100%;
    }

    .auth-tab {
        padding: 0.85rem 1rem;
        font-size: 0.9rem;
    }
    
    .nav-actions .nav-link,
    .nav-actions .mindwarp-button {
        font-size: 14px;
        padding: 0.6rem 1rem;
    }

    .nav-profile-link {
        justify-content: center;
    }

    .discussion-toolbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .discussion-toolbar-right {
        width: 100%;
        justify-content: space-between;
    }

    .discussion-detail {
        padding: 1.75rem;
    }

    .reply-composer {
        padding: 1.25rem;
    }

    .group-detail-actions {
        justify-content: flex-start;
    }

    .hero {
        padding: 5rem 1rem 3rem;
        min-height: auto;
    }
    
    .hero-heading {
        font-size: 2.25rem;
        margin-bottom: 1rem;
    }
    
    .hero-text {
        font-size: 1rem;
        margin-bottom: 2rem;
    }
    
    .hero-button {
        padding: 1rem 2rem;
        font-size: 0.95rem;
    }
    
    .hero-quote {
        padding: 1.5rem;
        margin: 3rem 0 2rem;
    }
    
    .hero-quote .quote-text {
        font-size: 1rem;
    }
    
    .hero-features {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-top: 3rem;
    }
    
    .feature-card {
        padding: 1.75rem;
    }
    
    .feature-card h3 {
        font-size: 1.25rem;
    }
    
    .feature-card p {
        font-size: 0.95rem;
    }
    
    .container, .learning-main {
        padding: 5rem 1rem 3rem;
    }
    
    .learning-heading {
        font-size: 2rem;
    }
    
    .auth-card {
        padding: 1.75rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .groups-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .topics-list {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .topic-item {
        min-height: 160px;
        border-width: 3px;
    }
    
    .topic-item-title {
        font-size: 1.2rem;
        padding: 1.5rem 1.75rem 0.75rem;
    }
    
    .topic-item-preview {
        font-size: 0.9rem;
        padding: 0 1.75rem 1.5rem;
    }
    
    .topic-item-number {
        font-size: 2.6rem;
        right: 1.25rem;
        top: 1.15rem;
    }
    
    .content {
        padding: 1.75rem;
    }
    
    .content h1 {
        font-size: 1.75rem;
    }
    
    .content h2 {
        font-size: 1.35rem;
    }
    
    .content h3 {
        font-size: 1.15rem;
    }
    
    .content-actions {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .mindwarp {
        width: 100%;
        right: -100%;
        padding: 2rem 1.25rem;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .roadmap, .pricing, .features-page {
        padding: 4rem 1rem;
    }
    
    .roadmap-heading, .pricing-heading, .features-heading {
        font-size: 2.25rem;
    }
    
    .roadmap-subtitle, .pricing-subtitle, .features-subtitle {
        font-size: 1rem;
    }
    
    .roadmap-grid, .pricing-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .roadmap-item {
        padding: 1.75rem;
    }
    
    .roadmap-item h3 {
        font-size: 1.15rem;
    }
    
    .roadmap-legend {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 1.5rem;
        padding: 1.5rem;
    }
    
    .lessons-header {
        gap: 1.5rem;
    }
    
    .lessons-header h1 {
        font-size: 2rem;
    }
    
    .lessons-filters {
        flex-wrap: wrap;
        gap: 0.75rem;
    }
    
    .search-input, .filter-select {
        min-width: 180px;
        flex: 1;
    }
    
    .subject-grid, .lessons-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .lesson-card {
        padding: 1.5rem;
    }
    
    .modal-content {
        padding: 1.5rem;
        margin: 1rem;
        max-width: 95%;
    }
    
    .modal-header h2 {
        font-size: 1.35rem;
    }
    
    .modal-actions {
        gap: 0.5rem;
        flex-wrap: wrap;
    }
    
    .icon-btn {
        min-width: 40px;
        height: 40px;
    }
    
    .quiz-header h3, .flashcard-header h3 {
        font-size: 1.25rem;
    }
    
    .flashcard-card {
        height: 320px;
    }
    
    .flashcard-face {
        padding: 1.75rem;
    }
    
    .flashcard-content {
        font-size: 1rem;
    }
    
    .flashcard-label {
        font-size: 0.7rem;
        padding: 0.4rem 0.75rem;
    }
    
    .helper-container {
        padding: 0;
    }
    
    .helper-header h1 {
        font-size: 2.25rem;
    }
    
    .helper-input-section, .helper-output-section {
        padding: 1.5rem;
    }
    
    .examples-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .mindwarp-features {
        grid-template-columns: 1fr;
    }
    
    .resources-grid {
        grid-template-columns: 1fr;
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
    }
    
    .features-list {
        gap: 2rem;
    }
    
    .feature-detail {
        padding: 1.75rem;
    }
    
    .pricing-card {
        padding: 2rem;
    }
    
    .pricing-tier-name {
        font-size: 1.5rem;
    }
    
    .price-amount {
        font-size: 3rem;
    }
}

/* Portrait orientation optimizations for mobile */
@media (max-width: 480px) and (orientation: portrait) {
    /* Optimize for vertical scrolling */
    html {
        scroll-padding-top: 80px;
    }

    /* Hero section - portrait optimized */
    .hero-content {
        padding: 5rem 1rem 2rem;
        min-height: auto;
    }

    .hero-heading {
        font-size: clamp(1.75rem, 8vw, 2.25rem);
        line-height: 1.1;
        margin-bottom: 1.25rem;
    }

    .hero-text {
        font-size: 1rem;
        line-height: 1.6;
        margin-bottom: 2rem;
    }

    /* Buttons optimized for portrait thumb reach */
    .hero-cta {
        position: sticky;
        bottom: 0;
        background: linear-gradient(to top, rgba(255,255,255,0.98) 85%, transparent);
        padding: 1.5rem 1rem;
        margin: 0 -1rem;
        z-index: 50;
    }

    .hero-button {
        width: 100%;
        padding: 1.25rem 2rem;
        font-size: 1rem;
        min-height: 56px;
    }

    /* Feature cards - single column for portrait */
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 0 0.5rem;
    }

    .feature-card {
        padding: 2rem 1.5rem;
        margin-bottom: 0.5rem;
    }

    /* Navigation - portrait optimized */
    .nav-actions {
        max-height: 70vh;
        border-radius: 0 0 12px 12px;
    }

    .nav-tab-bar {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .nav-tab-bar::-webkit-scrollbar {
        display: none;
    }

    /* Modal - portrait optimized */
    .modal-content {
        max-height: 85vh;
        width: 96%;
        margin: 1rem auto;
        border-radius: 12px 12px 0 0;
    }

    .modal-header {
        position: sticky;
        top: 0;
        background: white;
        z-index: 10;
        padding-bottom: 1rem;
        border-bottom: 2px solid var(--border);
    }

    /* Forms - portrait thumb-friendly */
    .form-field input,
    .form-field select,
    .form-field textarea {
        font-size: 16px;
        padding: 1rem;
        min-height: 52px;
    }

    /* Action buttons - bottom sticky for easy reach */
    .content-actions {
        position: sticky;
        bottom: 0;
        background: linear-gradient(to top, rgba(255,255,255,0.98) 85%, transparent);
        padding: 1.5rem 1rem;
        margin: 0 -1rem;
        z-index: 50;
    }

    .action-btn {
        min-height: 56px;
        font-size: 1rem;
    }

    /* Lesson cards - portrait optimized spacing */
    .lesson-card,
    .topic-item {
        margin-bottom: 1rem;
        padding: 1.75rem 1.25rem;
    }

    /* Quiz/Flashcard controls - thumb-friendly positioning */
    .flashcard-controls {
        position: sticky;
        bottom: 1rem;
        background: white;
        padding: 1.5rem;
        border-radius: 12px;
        box-shadow: 0 -4px 12px rgba(0,0,0,0.1);
    }

    .quiz-header,
    .flashcard-header {
        position: sticky;
        top: 60px;
        background: white;
        z-index: 20;
        padding-bottom: 1rem;
        border-bottom: 2px solid var(--border);
    }

    /* Profile page - portrait layout */
    .profile-preview {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 1.5rem 1rem;
    }

    /* Admin panel - portrait navigation */
    .admin-sidebar {
        position: sticky;
        top: 0;
        z-index: 100;
        max-height: 60px;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .admin-sidebar.expanded {
        max-height: 80vh;
    }

    /* Blog page - portrait reading experience */
    .blog-article {
        padding: 1.5rem 1rem;
        margin-bottom: 1.5rem;
    }

    .blog-markdown h1,
    .blog-markdown h2 {
        font-size: clamp(1.5rem, 6vw, 2rem);
        line-height: 1.2;
    }

    /* Helper page - portrait optimized */
    .helper-textarea {
        min-height: 180px;
        font-size: 16px;
    }

    .helper-solve-btn {
        position: sticky;
        bottom: 1rem;
        width: calc(100% - 2rem);
        margin: 1rem;
    }

    /* Community/Groups - portrait card layout */
    .group-card,
    .discussion-card {
        padding: 1.5rem 1rem;
        margin-bottom: 1rem;
    }

    /* Toast notifications - portrait positioning */
    .toast {
        bottom: auto;
        top: 70px;
        left: 1rem;
        right: 1rem;
        max-width: none;
    }

    /* Pricing cards - portrait stack */
    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 0 0.5rem;
    }

    /* Roadmap - portrait timeline */
    .roadmap-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-heading {
        font-size: 1.85rem;
    }

    .profile-main {
        margin: 96px auto 48px auto;
        padding: 0 1rem;
        gap: 1.5rem;
    }

    .profile-summary,
    .profile-form-wrapper {
        padding: 2rem 1.25rem;
    }

    .profile-preview {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .profile-avatar {
        width: 76px;
        height: 76px;
    }

    .avatar-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .accent-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .nav-actions {
        flex-direction: column;
        width: 100%;
        gap: 0.5rem;
    }
    
    .nav-link, .mindwarp-button {
        width: 100%;
        max-width: none;
        flex: 1 1 auto;
        text-align: center;
    }
    
    .content-actions {
        grid-template-columns: 1fr;
    }
    
    .roadmap-legend {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .examples-grid {
        grid-template-columns: 1fr;
    }
    
    .lessons-filters {
        flex-direction: column;
    }
    
    .search-input, .filter-select {
        width: 100%;
    }
}

.toast {
    position: fixed;
    bottom: 20px;
    left: 20px;
    padding: 0.75rem 1rem;
    background: var(--dark);
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 0;
    border: 2px solid var(--dark);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 10000;
    max-width: 400px;
}

.toast-show {
    opacity: 1;
    transform: translateY(0);
}

.toast-success {
    background: #10b981;
    border-color: #10b981;
    color: #ffffff;
}

.toast-error {
    background: #ef4444;
    border-color: #ef4444;
    color: #ffffff;
}

.toast-info {
    background: var(--dark);
    border-color: var(--dark);
    color: #ffffff;
}

@media (max-width: 768px) {
    .learning-intro {
        padding: 2rem 1rem;
    }
    
    .learning-heading {
        font-size: 2rem;
    }
    
    .learning-subheading {
        font-size: 1rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .topics-list {
        grid-template-columns: 1fr;
    }
    
    .topic-item {
        padding: 1.25rem;
    }
    
    .content-actions {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
    
    .action-btn {
        padding: 0.875rem 1rem;
        font-size: 0.85rem;
    }
    
    .action-btn svg {
        width: 16px;
        height: 16px;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-card {
        padding: 1.5rem;
    }
    
    .quiz-container,
    .flashcards-container {
        padding: 1.5rem;
        margin: 1rem 0;
    }
    
    .quiz-question {
        padding: 1.25rem;
    }
    
    .flashcard-card {
        min-height: 300px;
    }
    
    .modal-content {
        width: 95%;
        max-width: 95%;
        margin: 1rem;
        padding: 1.5rem;
    }
    
    .lesson-content h1 {
        font-size: 1.75rem;
    }
    
    .lesson-content h2 {
        font-size: 1.4rem;
    }
    
    .lesson-content h3 {
        font-size: 1.2rem;
    }
    
    .groups-grid {
        grid-template-columns: 1fr;
    }
    
    .group-card {
        padding: 1.5rem;
    }
    
    .toast {
        left: 10px;
        right: 10px;
        bottom: 10px;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0.75rem 1rem;
    }
    
    .nav-logo {
        height: 32px;
    }
    
    .learning-heading {
        font-size: 1.75rem;
    }
    
    .form-button {
        padding: 1rem;
        font-size: 0.95rem;
    }
    
    .content-actions {
        grid-template-columns: 1fr;
    }
    
    .action-btn {
        width: 100%;
        justify-content: center;
    }
    
    .dashboard-heading {
        font-size: 1.5rem;
    }
    
    .quiz-header h3,
    .flashcard-header h3 {
        font-size: 1.25rem;
    }
    
    .quiz-options {
        gap: 0.75rem;
    }
    
    .quiz-option {
        padding: 0.875rem;
        font-size: 0.9rem;
    }
    
    .modal-header h2 {
        font-size: 1.25rem;
    }
    
    .icon-btn {
        min-width: 40px;
        height: 40px;
    }
    
    .lesson-content {
        font-size: 1rem;
        line-height: 1.7;
    }
    
    .lesson-content h1 {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }
    
    .lesson-content h2 {
        font-size: 1.25rem;
        margin-top: 2rem;
        margin-bottom: 1rem;
    }
    
    .lesson-content h3 {
        font-size: 1.1rem;
    }

    /* Enhanced mobile responsiveness */
    .modal-content {
        width: 95%;
        max-width: 95%;
        margin: 0.5rem;
        padding: 1rem;
        border-width: 2px;
        box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.3);
        max-height: 90vh;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        border-radius: 0;
    }

    .modal-header {
        flex-direction: column;
        gap: 1rem;
        margin-bottom: 1.5rem;
        padding-bottom: 1rem;
    }

    .modal-actions {
        gap: 0.75rem;
        flex-wrap: wrap;
        margin-top: 1rem;
    }

    .icon-btn {
        min-width: 44px;
        height: 44px;
        font-size: 1.1rem;
    }

    .flashcard-card {
        min-height: 280px;
        padding: 1rem;
    }

    .flashcard-face {
        padding: 1.5rem;
    }

    /* Better touch targets */
    button, .nav-link, .action-btn, .form-button {
        min-height: 48px;
        min-width: 48px;
        touch-action: manipulation;
        padding: 0.75rem 1rem;
        margin: 0.25rem;
        border-radius: 0;
    }

    /* Specific button improvements */
    .hero-button, .topic-item, .lesson-card {
        min-height: 52px;
        margin-bottom: 0.75rem;
    }

    .action-btn {
        width: 100%;
        justify-content: center;
        min-height: 56px;
        padding: 1rem;
        margin-bottom: 1rem;
    }

    /* Navigation improvements */
    .nav-actions {
        width: calc(100vw - 2rem);
        max-height: 75vh;
        border-radius: 0;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .nav-link-secondary {
        padding: 1rem;
        font-size: 0.85rem;
        min-height: 48px;
        display: flex;
        align-items: center;
        justify-content: flex-start;
        margin-bottom: 0.25rem;
    }

    /* Form improvements */
    .form-field input, .form-field select, .form-field textarea {
        padding: 1rem;
        font-size: 16px; /* Prevents zoom on iOS */
        min-height: 48px;
        border-radius: 0;
        margin-bottom: 1rem;
    }

    .form-field label {
        margin-bottom: 0.5rem;
        font-weight: 700;
        display: block;
    }

    /* Topic and lesson cards */
    .topic-item, .lesson-card {
        padding: 1.5rem;
        border-width: 3px;
    }

    .topic-item-title {
        font-size: 1.2rem;
    }

    /* Feature cards */
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .feature-card {
        padding: 1.5rem;
    }

    .feature-icon-wrapper {
        width: 60px;
        height: 60px;
    }

    /* Hero section */
    .hero-content {
        padding: 4rem 1rem 2rem;
    }

    .hero-button {
        padding: 1rem 1.5rem;
        font-size: 0.9rem;
        border-width: 3px;
    }

    /* Admin panel improvements */
    .admin-body {
        padding: 0;
    }

    .admin-sidebar {
        width: 100%;
        max-width: 100%;
        border-right: none;
        border-bottom: 3px solid var(--dark);
    }

    .admin-main {
        margin-left: 0;
        padding: 1rem;
    }

    /* Toast notifications */
    .toast {
        left: 1rem;
        right: 1rem;
        bottom: 1rem;
        max-width: none;
        font-size: 0.9rem;
    }

    /* Table of contents and other content */
    .groups-grid, .community-grid {
        grid-template-columns: 1fr;
    }

    .group-card, .community-card {
        padding: 1.25rem;
    }

    /* PDF export dialog improvements */
    #pdfExportDialog .modal-content {
        padding: 1rem;
        max-height: 95vh;
    }

    #pdfExportDialog .modal-content h2 {
        font-size: 1.25rem;
        margin-bottom: 1rem;
    }

    #pdfExportDialog .modal-content h3 {
        font-size: 0.9rem;
        margin-bottom: 0.75rem;
    }

    #pdfExportDialog .modal-content label {
        font-size: 0.85rem;
    }

    #pdfExportDialog .modal-content select,
    #pdfExportDialog .modal-content input {
        padding: 0.5rem;
        font-size: 0.9rem;
    }

    #pdfExportDialog .modal-content button {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }

    /* PDF export dialog mobile-specific styles */
    #pdfExportDialog .modal-content {
        border-radius: 0;
    }

    #pdfExportDialog .modal-content .grid {
        grid-template-columns: 1fr !important;
        gap: 0.75rem !important;
    }

    #pdfExportDialog .modal-content .flex {
        flex-direction: column !important;
        gap: 0.5rem !important;
    }

    #pdfExportDialog .modal-content .flex button {
        width: 100% !important;
    }

    /* Ensure dialog doesn't exceed viewport */
    #pdfExportDialog {
        padding: 0.5rem !important;
    }

    /* Better scrolling on mobile */
    #pdfExportDialog .modal-content {
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: contain;
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
    }
    50% {
        transform: scale(1.02);
        box-shadow: 0 0 0 8px rgba(239, 68, 68, 0);
    }
}

/* Blog Page */
.blog-page {
    background:
        radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.15), transparent 55%),
        radial-gradient(circle at 85% 15%, rgba(236, 72, 153, 0.14), transparent 55%),
        radial-gradient(circle at 45% 100%, rgba(14, 165, 233, 0.12), transparent 55%),
        linear-gradient(130deg, #f8faff 0%, #fef3f9 55%, #e0f2fe 100%);
    color: var(--dark);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

.blog-page::before {
    content: '';
    position: fixed;
    inset: 0;
    background: repeating-linear-gradient(45deg, rgba(15, 23, 42, 0.04) 0, rgba(15, 23, 42, 0.04) 2px, transparent 2px, transparent 12px);
    mix-blend-mode: multiply;
    opacity: 0.5;
    pointer-events: none;
    z-index: -1;
}

.blog-main {
    max-width: min(960px, 90vw);
    margin: 0 auto;
    padding: clamp(3rem, 7vw, 5rem) 0 clamp(3.5rem, 8vw, 5.5rem);
    display: flex;
    flex-direction: column;
    gap: clamp(2.2rem, 5vw, 3rem);
}

.blog-hero {
    text-align: center;
    border: 3px solid var(--dark);
    border-radius: 36px;
    padding: clamp(2.4rem, 6vw, 3rem);
    background: rgba(255, 255, 255, 0.82);
    box-shadow:
        12px 12px 0 var(--dark),
        0 35px 60px rgba(15, 23, 42, 0.18);
}

.blog-hero h1 {
    font-size: clamp(2.6rem, 4.5vw, 3.3rem);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.blog-subtitle {
    max-width: 620px;
    margin: 0.85rem auto 0;
    color: rgba(15, 23, 42, 0.7);
    font-weight: 600;
    line-height: 1.7;
}

.blog-article {
    border: 3px solid var(--dark);
    border-radius: 36px;
    padding: clamp(2.2rem, 5vw, 3.2rem);
    background: rgba(255, 255, 255, 0.86);
    box-shadow:
        12px 12px 0 var(--dark),
        0 35px 60px rgba(15, 23, 42, 0.16);
}

.blog-hero-image {
    border: 3px solid var(--dark);
    background-size: cover;
    background-position: center;
    height: clamp(220px, 38vw, 360px);
    margin-bottom: 1.5rem;
    border-radius: 24px;
    box-shadow: 8px 8px 0 var(--dark);
}

.blog-header h2 {
    font-size: clamp(2rem, 3.5vw, 2.7rem);
    margin: 0;
}

.blog-excerpt {
    font-size: 1.05rem;
    color: rgba(15, 23, 42, 0.78);
    margin: 0.9rem 0 1.6rem;
    font-weight: 600;
}

.blog-tags {
    list-style: none;
    margin: 0 0 1.8rem;
    padding: 0;
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.blog-tags li {
    border: 3px solid var(--dark);
    background: rgba(241, 245, 249, 0.9);
    padding: 0.4rem 0.85rem;
    font-weight: 700;
    box-shadow: 5px 5px 0 var(--dark);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
}

.blog-markdown h1,
.blog-markdown h2,
.blog-markdown h3 {
    margin-top: 2.2rem;
    text-transform: uppercase;
}

.blog-markdown p {
    line-height: 1.85;
    margin: 1.4rem 0;
    color: rgba(15, 23, 42, 0.85);
}

.blog-markdown pre {
    background: #0f172a;
    color: #e2e8f0;
    border: 3px solid var(--dark);
    box-shadow: 7px 7px 0 var(--dark);
    padding: 1.2rem;
    overflow-x: auto;
    border-radius: 18px;
}

.blog-empty,
.blog-loading {
    text-align: center;
    color: rgba(15, 23, 42, 0.7);
    font-weight: 600;
}

.blog-footer {
    text-align: center;
    padding: 3.2rem 1rem 4.2rem;
    color: rgba(15, 23, 42, 0.65);
    font-weight: 600;
}

@supports (backdrop-filter: blur(6px)) {
    .blog-hero,
    .blog-article {
        backdrop-filter: blur(16px);
        background: rgba(255, 255, 255, 0.75);
    }
}

/* ============================================
   Interactive Mindmap Styles for Main Learning
   ============================================ */

.mindmap-container {
    background: #ffffff;
    border: 4px solid #000;
    padding: 1rem;
    margin: 1rem 0;
    box-shadow: 8px 8px 0 #000;
    border-radius: 12px;
    overflow: hidden;
    cursor: grab;
    position: relative;
    min-height: 500px;
}

.mindmap-container:active {
    cursor: grabbing;
}

.mindmap-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #e5e7eb;
}

.mindmap-header h3 {
    font-size: 1.5rem;
    font-weight: 800;
    color: #000;
    margin: 0;
}

.mindmap-meta {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.mindmap-meta span {
    background: #f3f4f6;
    color: #374151;
    padding: 0.25rem 0.75rem;
    border: 2px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.mindmap-controls {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.mindmap-btn {
    background: #000;
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 6px;
    box-shadow: 2px 2px 0 #000;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mindmap-btn:hover {
    transform: translate(-1px, -1px);
    box-shadow: 3px 3px 0 #000;
    background: #333;
}

.mindmap-btn:active {
    transform: translate(0, 0);
    box-shadow: 1px 1px 0 #000;
}

.mindmap-display {
    background: #f8fafc;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    overflow: hidden;
    cursor: grab;
    min-height: 400px;
}

.mindmap-display:active {
    cursor: grabbing;
}

.mindmap-svg {
    width: 100%;
    height: 600px;
    transition: transform 0.3s ease;
    transform-origin: center center;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #6b7280;
    padding: 0.25rem;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.close-btn:hover {
    background: #f3f4f6;
    color: #000;
}

.error-container {
    background: #fee2e2;
    border: 3px solid #ef4444;
    padding: 2rem;
    text-align: center;
    border-radius: 8px;
    margin: 1rem 0;
}

.error-container h3 {
    color: #991b1b;
    margin-bottom: 1rem;
}

.error-container p {
    color: #991b1b;
    margin-bottom: 1.5rem;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}