:root {
    --color-background: #ffffff;
    --color-foreground: #0f172a;
    --color-muted: #f1f5f9;
    --color-muted-foreground: #64748b;
    --color-card: #ffffff;
    --color-border: #e2e8f0;
    --color-primary: #0ea5e9;
    --color-primary-foreground: #ffffff;
    --color-primary-light: rgba(14, 165, 233, 0.1);
    --color-primary-border: rgba(14, 165, 233, 0.2);
    --color-secondary: #10b981;
    --color-secondary-foreground: #ffffff;
    --color-secondary-light: rgba(16, 185, 129, 0.1);
    --color-secondary-border: rgba(16, 185, 129, 0.2);
    --color-accent: #8b5cf6;
    --color-accent-foreground: #ffffff;
    --color-accent-light: rgba(139, 92, 246, 0.1);
    --color-accent-border: rgba(139, 92, 246, 0.2);
    --color-success: #10b981;
    --color-success-bg: #ecfdf5;
    --color-success-border: #a7f3d0;
    --color-error: #ef4444;
    --color-error-bg: #fef2f2;
    --color-error-border: #fecaca;
    --color-slate-50: #f8fafc;
    --color-slate-100: #f1f5f9;
    --color-slate-200: #e2e8f0;
    --color-slate-400: #94a3b8;
    --color-slate-600: #475569;
    --color-slate-700: #334155;
    --color-slate-800: #1e293b;
    --color-slate-900: #0f172a;
    --color-cyan-50: #ecfeff;
    --color-emerald-50: #ecfdf5;
    --color-purple-50: #faf5ff;
    --font-sans:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
        Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 1.85rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 1.75rem;
    --font-weight-normal: 400;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.25rem;
    --spacing-4: 0.2rem;
    --spacing-5: 1.25rem;
    --spacing-6: 0.5rem;
    --spacing-8: 2rem;
    --spacing-10: 0.5rem;
    --spacing-12: 3rem;
    --spacing-14: 3.5rem;
    --spacing-16: 4rem;
    --spacing-20: 1rem;
    --spacing-24: 2rem;
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md:
        0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg:
        0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl:
        0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal: 300;
    --z-tooltip: 400;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-foreground);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img,
svg,
video {
    display: block;
    max-width: 100%;
}

button {
    font: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: 100%;
    max-width: 72rem;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-8);
    }
}

.breadcrumb-nav {
    background-color: var(--color-muted);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-xs);
}

.breadcrumb-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--color-muted-foreground);
}

.breadcrumb-link {
    color: var(--color-muted-foreground);
    transition: color var(--transition-fast);
}

.breadcrumb-link:hover {
    color: var(--color-foreground);
}

.breadcrumb-separator {
    color: var(--color-primary);
}

.breadcrumb-current {
    color: var(--color-foreground);
    font-weight: var(--font-weight-semibold);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.logo-icon {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: var(--radius-xl);
    background-color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-normal);
}

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

.logo-icon .lucide-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: var(--color-primary-foreground);
}

.logo-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-foreground);
    letter-spacing: -0.025em;
}

.nav-desktop {
    display: none;
    align-items: center;
    gap: var(--spacing-8);
}

@media (min-width: 768px) {
    .nav-desktop {
        display: flex;
    }
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-muted-foreground);
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-primary);
}

.mobile-menu-btn {
    display: flex;
    padding: var(--spacing-2);
    color: var(--color-muted-foreground);
    transition: color var(--transition-fast);
}

.mobile-menu-btn:hover {
    color: var(--color-foreground);
}

@media (min-width: 768px) {
    .mobile-menu-btn {
        display: none;
    }
}

.mobile-menu-btn svg {
    width: 1.5rem;
    height: 1.5rem;
}

.mobile-menu {
    display: none;
    border-top: 1px solid var(--color-border);
    background-color: var(--color-card);
    padding: var(--spacing-4);
    position: absolute;
    width: 100%;
    box-shadow: var(--shadow-lg);
}

.mobile-menu.active {
    display: block;
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.mobile-nav-link {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-foreground);
    transition: color var(--transition-fast);
}

.mobile-nav-link:hover {
    color: var(--color-primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn:focus-visible {
    outline: none;
    box-shadow:
        0 0 0 2px var(--color-background),
        0 0 0 4px var(--color-primary);
}

.btn:disabled {
    pointer-events: none;
    opacity: 0.5;
}

.btn svg {
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
}

.btn-sm {
    height: 2.25rem;
    padding: 0 var(--spacing-4);
    font-size: var(--font-size-sm);
}

.btn-lg {
    height: 3rem;
    padding: 0 var(--spacing-8);
    font-size: var(--font-size-base);
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-primary-foreground);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background-color: #0284c7;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(14, 165, 233, 0.4);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--color-primary-border);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
    background-color: var(--color-primary-light);
}

.hero-section {
    position: relative;
    overflow: hidden;
    background-color: var(--color-background);
    padding: 10;
}

@media (min-width: 768px) {
    .hero-section {
        padding: var(--spacing-20) var(--spacing-8) var(--spacing-10);
    }
}

.hero-bg {
    position: absolute;
    inset: 0;
    opacity: 0.2;
    pointer-events: none;
    background-image: url("https://images.unsplash.com/photo-1576091160399-112ba8d25d1d?w=1200&h=800&fit=crop");
    background-size: cover;
    background-position: center center;
    background-attachment: fixed;
}

.hero-glow {
    position: absolute;
    border-radius: var(--radius-full);
    filter: blur(3rem);
    pointer-events: none;
    opacity: 0.05;
}

.hero-glow-left {
    top: 0;
    left: 0;
    width: 18rem;
    height: 18rem;
    background-color: var(--color-primary);
    transform: translate(-50%, -50%);
}

.hero-glow-right {
    top: 0;
    right: 0;
    width: 24rem;
    height: 24rem;
    background-color: var(--color-accent);
    transform: translate(33%, -33%);
}

.hero-content {
    position: relative;
    z-index: 10;
}

.hero-text {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-1) var(--spacing-4);
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-primary-border);
    margin-bottom: var(--spacing-5);
}

.hero-badge .lucide-icon-small {
    width: 0.875rem;
    height: 0.875rem;
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
    line-height: var(--line-height-tight);
    letter-spacing: -0.025em;
    margin-bottom: var(--spacing-4);
}

@media (min-width: 768px) {
    .hero-title {
        font-size: var(--font-size-6xl);
    }
}

.text-primary {
    color: var(--color-primary);
}

.hero-description {
    font-size: var(--font-size-base);
    color: var(--color-muted-foreground);
    max-width: 36rem;
    margin: 0 auto var(--spacing-6);
    line-height: var(--line-height-relaxed);
}

@media (min-width: 768px) {
    .hero-description {
        font-size: var(--font-size-lg);
    }
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-2);
}

.hero-mockups {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-8);
}

@media (min-width: 768px) {
    .hero-mockups {
        flex-direction: row;
        gap: var(--spacing-12);
    }
}

.mockup-mobile {
    position: relative;
    z-index: 10;
}

.mockup-phone {
    position: relative;
    width: 210px;
}

.mockup-phone::before {
    content: "";
    position: absolute;
    inset: -10px;
    background-color: rgba(14, 165, 233, 0.15);
    border-radius: 3.5rem;
    filter: blur(1.5rem);
    transform: scale(0.9);
    z-index: -1;
}

.phone-frame {
    position: relative;
    background-color: var(--color-slate-800);
    border-radius: 2.5rem;
    padding: 12px;
    box-shadow:
        0 25px 50px -12px rgba(0, 0, 0, 0.25),
        inset 0 0 0 2px var(--color-slate-700);
    z-index: 10;
}

.phone-notch {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 50%;
    height: 1.5rem;
    background-color: var(--color-slate-800);
    border-bottom-left-radius: 1rem;
    border-bottom-right-radius: 1rem;
    z-index: 20;
}

.phone-screen {
    background-color: var(--color-slate-50);
    border-radius: 1.8rem;
    overflow: hidden;
    height: 400px;
    position: relative;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.05);
}

.quiz-interface {
    padding: var(--spacing-3) var(--spacing-3) var(--spacing-3);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.quiz-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-2);
}

.quiz-progress {
    font-size: 8px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-slate-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.quiz-tag {
    font-size: 8px;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    background-color: var(--color-primary-light);
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

.progress-bar {
    width: 100%;
    background-color: var(--color-slate-100);
    border-radius: var(--radius-full);
    height: 4px;
    margin-bottom: var(--spacing-3);
}

.progress-fill {
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    height: 100%;
}

.quiz-question {
    font-size: 10px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-slate-700);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-2);
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.quiz-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    font-size: 9px;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
}

.quiz-option.incorrect {
    border-color: var(--color-error-border);
    background-color: var(--color-error-bg);
    color: var(--color-error);
}

.quiz-option.correct {
    border-color: var(--color-primary-border);
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.quiz-option.selected {
    border-width: 2px;
}

.option-letter {
    width: 1rem;
    height: 1rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8px;
    font-weight: var(--font-weight-bold);
    flex-shrink: 0;
}

.quiz-option.incorrect .option-letter {
    background-color: var(--color-error-bg);
    color: var(--color-error);
}

.quiz-option.correct .option-letter {
    background-color: var(--color-primary);
    color: var(--color-primary-foreground);
}

.quiz-option:not(.correct):not(.incorrect) .option-letter {
    background-color: var(--color-slate-100);
    color: var(--color-slate-400);
}

.quiz-feedback {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    margin-top: var(--spacing-2);
    padding: var(--spacing-1);
    background-color: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
    border-radius: var(--radius-lg);
}

.quiz-feedback .lucide-icon-tiny {
    width: 12px;
    height: 12px;
    color: var(--color-success);
    flex-shrink: 0;
}

.quiz-feedback span {
    font-size: 8px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-success);
}

.quiz-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-2);
}

.quiz-score {
    font-size: 8px;
    color: var(--color-slate-400);
}

.btn-next {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    background-color: var(--color-primary);
    color: white;
    font-size: 8px;
    font-weight: var(--font-weight-bold);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-lg);
}

.btn-next .lucide-icon-tiny {
    width: 8px;
    height: 8px;
}

.mockup-desktop {
    position: relative;
    z-index: 10;
    display: none;
}

@media (min-width: 768px) {
    .mockup-desktop {
        display: block;
        margin-bottom: -0.5rem;
    }
}

.mockup-desktop .mockup-laptop {
    position: relative;
    width: 480px;
}

.mockup-desktop .mockup-laptop::before {
    content: "";
    position: absolute;
    inset: 0;
    background-color: rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-2xl);
    filter: blur(1.5rem);
    transform: scale(0.9);
    z-index: -1;
}

.laptop-screen {
    background-color: var(--color-slate-800);
    border-radius: var(--radius-xl) var(--radius-xl) var(--radius-sm)
        var(--radius-sm);
    border: 2px solid var(--color-slate-600);
    border-bottom: none;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    height: 400px;
}

.browser-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    background-color: var(--color-slate-100);
    border-bottom: 1px solid var(--color-slate-200);
    padding: var(--spacing-1) var(--spacing-2);
}

.browser-dots {
    display: flex;
    gap: var(--spacing-1);
}

.browser-dots .dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
}

.browser-dots .red {
    background-color: #f87171;
}
.browser-dots .yellow {
    background-color: #fbbf24;
}
.browser-dots .green {
    background-color: #4ade80;
}

.browser-url {
    flex: 1;
    margin: 0 var(--spacing-2);
    background-color: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-0) var(--spacing-2);
    font-size: 7px;
    color: var(--color-slate-400);
    font-weight: var(--font-weight-medium);
    text-align: center;
}

.laptop-content {
    margin: 4px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--color-slate-50);
    height: calc(100% - 18px);
    position: relative;
}

.laptop-content-inner {
    padding: var(--spacing-3) var(--spacing-3) var(--spacing-4);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
    animation: scrollContent 15s linear infinite;
}

@keyframes scrollContent {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-260px);
    }
}

.quiz-card {
    background-color: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-slate-100);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-2);
    flex-shrink: 0;
}

.subject-tag {
    font-size: 7px;
    font-weight: var(--font-weight-bold);
    padding: 2px 6px;
    border-radius: var(--radius-full);
}

.subject-tag.science {
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}
.subject-tag.english {
    color: var(--color-accent);
    background-color: var(--color-accent-light);
}
.subject-tag.math {
    color: var(--color-secondary);
    background-color: var(--color-secondary-light);
}
.subject-tag.biology {
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}
.subject-tag.vocabulary {
    color: var(--color-accent);
    background-color: var(--color-accent-light);
}
.subject-tag.anatomy {
    color: var(--color-secondary);
    background-color: var(--color-secondary-light);
}

.quiz-card p {
    font-size: 8px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-slate-700);
    margin-bottom: var(--spacing-1);
}

.answer-correct {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px;
    border-radius: var(--radius-md);
    background-color: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
}

.answer-correct .lucide-icon-tiny {
    width: 8px;
    height: 8px;
    color: var(--color-success);
}

.answer-correct span {
    font-size: 7px;
    font-weight: var(--font-weight-medium);
    color: var(--color-success);
}

.laptop-content::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2.5rem;
    background: linear-gradient(to top, var(--color-slate-50), transparent);
    pointer-events: none;
}

.laptop-base {
    background-color: var(--color-slate-700);
    height: 6px;
    border: 2px solid var(--color-slate-600);
    border-top: none;
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.laptop-feet {
    display: flex;
    justify-content: space-between;
    padding: 0 var(--spacing-4);
    margin-top: -2px;
}

.laptop-feet .foot {
    width: 2rem;
    height: 4px;
    background-color: var(--color-slate-600);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.hero-stats {
    position: absolute;
    left: 0;
    right: 0;
    z-index: 5;
    width: 120%;
    max-width: 72rem;
    margin: 0 auto;
    top: 80%;
    transform: translateY(-50%);
    pointer-events: none;
}

.hero-stats .stats-container {
    pointer-events: auto;
    background-color: var(--color-slate-900);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-5) var(--spacing-8);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-4);
    box-shadow: var(--shadow-xl);
}

@media (min-width: 768px) {
    .hero-stats .stats-container {
        padding: var(--spacing-3) var(--spacing-8);
    }
}

.stats-grid {
    display: flex;
    align-items: center;
    gap: var(--spacing-8);
    flex: 1;
    flex-wrap: wrap;
}

@media (min-width: 768px) {
    .stats-grid {
        gap: var(--spacing-12);
    }
    .stat-item:nth-child(3) {
        margin-left: auto;
    }
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.stat-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-xl);
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon .lucide-icon-small {
    width: 1.25rem;
    height: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
}

.stat-value {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: rgba(255, 255, 255, 0.9);
    white-space: nowrap;
}

.stat-label {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.75);
}

.stats-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-6);
    background-color: var(--color-primary);
    color: white;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    border-radius: var(--radius-full);
    transition: background-color var(--transition-fast);
    flex-shrink: 0;
    height: 2.5rem;
}

.stats-cta:hover {
    background-color: #0284c7;
}

.stats-cta .lucide-icon-small {
    width: 1rem;
    height: 1rem;
    margin-left: var(--spacing-1);
}

.section {
    padding: var(--spacing-20) var(--spacing-4);
}

@media (min-width: 768px) {
    .section {
        padding: var(--spacing-24) var(--spacing-8);
    }
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-12);
}

.section-label {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-3);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-foreground);
    margin-bottom: var(--spacing-3);
}

@media (min-width: 768px) {
    .section-title {
        font-size: var(--font-size-4xl);
    }
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-muted-foreground);
    max-width: 48rem;
    margin: 0 auto;
}

.exams-section {
    background-color: var(--color-primary-light);
}

.exam-grid {
    display: grid;
    gap: var(--spacing-6);
}

@media (min-width: 768px) {
    .exam-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.exam-card {
    background-color: white;
    border-radius: var(--radius-2xl);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: box-shadow var(--transition-normal);
}

.exam-card:hover {
    box-shadow: var(--shadow-md);
}

.exam-teas {
    background-color: var(--color-cyan-50);
}

.exam-hesi {
    background-color: var(--color-emerald-50);
}

.exam-nex {
    background-color: var(--color-purple-50);
}

.exam-card-header {
    padding: var(--spacing-6) var(--spacing-6) var(--spacing-4);
}

.exam-icon {
    width: 2.75rem;
    height: 2.75rem;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-4);
}

.exam-teas .exam-icon {
    background-color: var(--color-primary);
}
.exam-hesi .exam-icon {
    background-color: var(--color-secondary);
}
.exam-nex .exam-icon {
    background-color: var(--color-accent);
}

.exam-icon .lucide-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: white;
}

.exam-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-foreground);
    margin-bottom: var(--spacing-1);
}

.exam-description {
    font-size: var(--font-size-sm);
    color: var(--color-muted-foreground);
    line-height: var(--line-height-relaxed);
}

.exam-subjects {
    padding: 0 var(--spacing-4) var(--spacing-5);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.subject-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
    text-align: left;
    background-color: white;
    position: relative;
    z-index: 2;
}

.subject-btn:hover {
    background-color: var(--color-muted);
    border-color: var(--color-primary);
}

.subject-btn span:first-child {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-foreground);
}

.subject-btn-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.subject-count {
    font-size: var(--font-size-xs);
    color: var(--color-muted-foreground);
}

.chevron {
    width: 1rem;
    height: 1rem;
    color: var(--color-muted-foreground);
    transition: transform var(--transition-normal);
}

.subject-btn[aria-expanded="true"] .chevron {
    transform: rotate(180deg);
}
.subject-content {
    overflow: hidden;
    transition: all var(--transition-normal);
    border-radius: var(--radius-xl);
    margin-top: var(--spacing-2);
    position: relative;
    z-index: 1;
}

.subject-content[hidden] {
    display: none;
}

.subject-btn[aria-expanded="true"] {
    border-bottom: none;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.subject-btn[aria-expanded="true"] + .subject-content {
    margin-top: 0;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}

.exam-teas .subject-btn[aria-expanded="true"] {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary-border);
}

.exam-teas .subject-btn[aria-expanded="true"] + .subject-content {
    background-color: var(--color-primary-light);
    border: 1px solid var(--color-primary-border);
    border-top: none;
}

.exam-hesi .subject-btn[aria-expanded="true"] {
    background-color: var(--color-secondary-light);
    border-color: var(--color-secondary-border);
}

.exam-hesi .subject-btn[aria-expanded="true"] + .subject-content {
    background-color: var(--color-secondary-light);
    border: 1px solid var(--color-secondary-border);
    border-top: none;
}

.exam-nex .subject-btn[aria-expanded="true"] {
    background-color: var(--color-accent-light);
    border-color: var(--color-accent-border);
}

.exam-nex .subject-btn[aria-expanded="true"] + .subject-content {
    background-color: var(--color-accent-light);
    border: 1px solid var(--color-accent-border);
    border-top: none;
}

.subject-content:not([hidden]) .test-list {
    border: none;
    background-color: transparent;
    padding: var(--spacing-4);
    margin-top: 0;
}

.test-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    background-color: white;
    margin-bottom: var(--spacing-2);
}

.test-item:last-child {
    margin-bottom: 0;
}

.test-item:hover {
    background-color: var(--color-muted);
    border-color: var(--color-border);
    transform: translateX(2px);
}

.exam-teas .subject-content:not([hidden]) .test-item:hover {
    background-color: rgba(255, 255, 255, 0.8);
    border-color: var(--color-primary-border);
}

.exam-hesi .subject-content:not([hidden]) .test-item:hover {
    background-color: rgba(255, 255, 255, 0.8);
    border-color: var(--color-secondary-border);
}

.exam-nex .subject-content:not([hidden]) .test-item:hover {
    background-color: rgba(255, 255, 255, 0.8);
    border-color: var(--color-accent-border);
}

.test-icon {
    width: 1.25rem;
    height: 1.25rem;
    color: var(--color-muted-foreground);
    flex-shrink: 0;
}

.exam-teas .subject-content:not([hidden]) .test-icon {
    color: var(--color-primary);
}

.exam-hesi .subject-content:not([hidden]) .test-icon {
    color: var(--color-secondary);
}

.exam-nex .subject-content:not([hidden]) .test-icon {
    color: var(--color-accent);
}

.test-item div {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-1);
}

.test-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-foreground);
}

.test-questions {
    font-size: var(--font-size-xs);
    color: var(--color-muted-foreground);
}

.features-section {
    background-color: var(--color-muted);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-12);
    position: relative;
    padding: 0 var(--spacing-4);
}

.features-grid::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-foreground);
    transform: translateX(-50%);
    z-index: 1;
}

@media (min-width: 1024px) {
    .features-grid {
        gap: var(--spacing-16);
        padding: 0 var(--spacing-8);
    }
}

.features-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
    position: relative;
    z-index: 2;
}

.feature-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
}

@media (min-width: 640px) {
    .feature-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-6);
    }
}

.feature-card {
    background-color: var(--color-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    padding: var(--spacing-5);
    transition: all var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.feature-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.feature-card.primary {
    border-color: var(--color-primary-border);
}
.feature-card.secondary {
    border-color: var(--color-secondary-border);
}
.feature-card.accent {
    border-color: var(--color-accent-border);
}

.feature-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-3);
    flex-shrink: 0;
}

.feature-icon.primary {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}
.feature-icon.secondary {
    background-color: var(--color-secondary-light);
    color: var(--color-secondary);
}
.feature-icon.accent {
    background-color: var(--color-accent-light);
    color: var(--color-accent);
}

.feature-icon .lucide-icon {
    width: 1.25rem;
    height: 1.25rem;
}

.feature-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    color: var(--color-foreground);
    margin-bottom: var(--spacing-1);
}

.feature-description {
    font-size: var(--font-size-xs);
    color: var(--color-muted-foreground);
    line-height: var(--line-height-relaxed);
    flex-grow: 1;
}
.steps-section {
    background-color: var(--color-background);
}

.steps-grid {
    display: grid;
    gap: var(--spacing-6);
}

@media (min-width: 768px) {
    .steps-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.step-card {
    background-color: var(--color-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    padding: var(--spacing-1);
    transition: box-shadow var(--transition-normal);
}

.step-card:hover {
    box-shadow: var(--shadow-md);
}

.step-card-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-4);
}

.step-number {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
}

.step-number.primary {
    color: var(--color-primary);
}
.step-number.accent {
    color: var(--color-accent);
}
.step-number.secondary {
    color: var(--color-secondary);
}

.step-icon {
    margin-top: var(--spacing-1);
}

.step-icon.primary {
    color: var(--color-primary);
}
.step-icon.accent {
    color: var(--color-accent);
}
.step-icon.secondary {
    color: var(--color-secondary);
}

.step-icon .lucide-icon {
    width: 1.5rem;
    height: 1.5rem;
}

.step-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-foreground);
    margin-bottom: var(--spacing-2);
}

.step-description {
    font-size: var(--font-size-sm);
    color: var(--color-muted-foreground);
    line-height: var(--line-height-relaxed);
}

.cta-section {
    background-color: var(--color-primary-light);
}

.cta-content {
    max-width: 48rem;
    margin: 0 auto;
    text-align: center;
}

.cta-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-foreground);
    margin-bottom: var(--spacing-4);
}

@media (min-width: 768px) {
    .cta-title {
        font-size: var(--font-size-4xl);
    }
}

.cta-description {
    font-size: var(--font-size-lg);
    color: var(--color-muted-foreground);
    margin-bottom: var(--spacing-8);
    max-width: 36rem;
    margin-left: auto;
    margin-right: auto;
}

.site-footer {
    background-color: var(--color-card);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-10) var(--spacing-4);
}

.footer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-4);
}

@media (min-width: 768px) {
    .footer-container {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.footer-logo .logo-icon {
    width: 2rem;
    height: 2rem;
}

.footer-logo .logo-icon .lucide-icon {
    width: 1rem;
    height: 1rem;
}

.footer-logo .logo-text {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
}

.footer-nav {
    display: flex;
    gap: var(--spacing-6);
}

.footer-link {
    font-size: var(--font-size-xs);
    color: var(--color-muted-foreground);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-foreground);
}

.footer-copyright {
    font-size: var(--font-size-xs);
    color: var(--color-muted-foreground);
}

.text-primary {
    color: var(--color-primary);
}
.text-secondary {
    color: var(--color-secondary);
}
.text-accent {
    color: var(--color-accent);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.lucide-icon {
    width: 1.5rem;
    height: 1.5rem;
}

.lucide-icon-small {
    width: 1rem;
    height: 1rem;
}

.lucide-icon-tiny {
    width: 0.75rem;
    height: 0.75rem;
}

@media (max-width: 767px) {
    .hero-stats {
        z-index: 15;
        top: 92%;
        transform: translateY(-50%);
        width: 100%;
        padding: 0 var(--spacing-4);
        pointer-events: none;
    }

    .hero-stats .stats-container {
        pointer-events: auto;
        padding: var(--spacing-4) var(--spacing-4);
        margin-top: var(--spacing-4);
        box-shadow: var(--shadow-lg);
    }

    .stats-grid {
        gap: var(--spacing-4);
        justify-content: center;
    }

    .stat-item {
        gap: var(--spacing-2);
    }

    .stat-value {
        font-size: var(--font-size-xs);
    }

    .stat-label {
        font-size: 0.65rem;
    }
}

/* Legal Pages Typography & Spacing */
.legal-content {
    max-width: 60rem;
    margin: 0 auto;
    color: var(--color-slate-700);
    line-height: var(--line-height-relaxed);
}

.legal-content h2 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-foreground);
    margin-top: var(--spacing-8);
    margin-bottom: var(--spacing-4);
}

.legal-content h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-foreground);
    margin-top: var(--spacing-6);
    margin-bottom: var(--spacing-2);
}

.legal-content p {
    margin-bottom: var(--spacing-4);
}

.legal-content ul {
    margin-bottom: var(--spacing-4);
    padding-left: var(--spacing-6);
}

.legal-content li {
    margin-bottom: var(--spacing-2);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-2);
}

.legal-content li::before {
    content: "✔";
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
}