/* ============================================
   Quantum Learning Platform - Main Stylesheet
   Design System: Green & Amber with Dark Mode
   ============================================ */

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
    /* Colors - Green Primary (Earthy Medium Green) */
    --color-green-50: #f0fdf4;
    --color-green-100: #dcfce7;
    --color-green-500: #16a34a;
    --color-green-600: #16a34a;
    --color-green-700: #15803d;
    --color-green-800: #166534;
    --color-green-900: #14532d;

    /* Colors - Amber Secondary */
    --color-amber-50: #fffbeb;
    --color-amber-100: #fef3c7;
    --color-amber-200: #fde68a;
    --color-amber-300: #fcd34d;
    --color-amber-400: #fbbf24;

    /* Colors - Earthy Neutrals (Warm Beiges & Browns) */
    --color-white: #fdfcfb;
    --color-gray-50: #f7f5f2;
    --color-gray-100: #f0ebe4;
    --color-gray-200: #e3ddd3;
    --color-gray-300: #d4c5a9;
    --color-gray-400: #9a8d7a;
    --color-gray-500: #8a7d6f;
    --color-gray-600: #6b5e4f;
    --color-gray-700: #3d3730;
    --color-gray-800: #3d3730;
    --color-gray-900: #2b281f;

    /* Semantic Colors - Light Mode */
    --bg-primary: var(--color-white);
    --bg-secondary: var(--color-gray-50);
    --bg-accent: var(--color-amber-50);
    --text-primary: var(--color-gray-900);
    --text-secondary: var(--color-gray-600);
    --text-accent: var(--color-green-700);
    --border-color: var(--color-amber-200);
    --border-hover: var(--color-green-300);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
}

/* Dark Mode - Warm Earthy Dark Backgrounds */
[data-theme="dark"] {
    /* Warm earthy dark backgrounds */
    --bg-primary: #1c1a16;
    --bg-secondary: #2b281f;
    --bg-accent: #0f1a12;

    /* Warm text with better contrast */
    --text-primary: #f5f1e8;
    --text-secondary: #c9b898;
    --text-accent: #16a34a;

    /* Subtle earthy borders */
    --border-color: rgba(212, 197, 169, 0.15);
    --border-hover: rgba(22, 163, 74, 0.4);

    /* Dark mode specific color overrides */
    --color-green-50: #064e3b;
    --color-green-100: #065f46;
    --color-amber-50: #422006;
    --color-amber-100: #78350f;
}

/* Dark mode hero gradient */
[data-theme="dark"] .hero {
    background: linear-gradient(to bottom, #1a1f28 0%, #0f1419 50%, #0a0e14 100%);
}

/* Dark mode badge adjustments */
[data-theme="dark"] .hero-badge {
    background-color: rgba(52, 211, 153, 0.1);
    color: #6ee7b7;
    border-color: rgba(52, 211, 153, 0.2);
}

/* Dark mode badge colors */
[data-theme="dark"] .badge-green {
    background-color: rgba(52, 211, 153, 0.15);
    color: #6ee7b7;
    border-color: rgba(52, 211, 153, 0.3);
}

[data-theme="dark"] .badge-amber {
    background-color: rgba(251, 191, 36, 0.15);
    color: #fcd34d;
    border-color: rgba(251, 191, 36, 0.3);
}

[data-theme="dark"] .badge-gray {
    background-color: rgba(156, 163, 175, 0.15);
    color: #d1d5db;
    border-color: rgba(156, 163, 175, 0.3);
}

/* Dark mode button hover improvements */
[data-theme="dark"] .btn-outline:hover {
    background-color: rgba(52, 211, 153, 0.1);
}

[data-theme="dark"] .btn-secondary:hover {
    background-color: rgba(52, 211, 153, 0.05);
}

/* Dark mode card improvements */
[data-theme="dark"] .card {
    background-color: rgba(31, 41, 55, 0.5);
    backdrop-filter: blur(10px);
}

[data-theme="dark"] .card:hover {
    background-color: rgba(31, 41, 55, 0.7);
    border-color: #10b981;
}

/* Dark mode link hover */
[data-theme="dark"] a:hover {
    color: #6ee7b7;
}

/* ============================================
   High Contrast Mode (Accessibility)
   ============================================ */
[data-theme="high-contrast"] {
    /* Maximum contrast colors */
    --bg-primary: #000000;
    --bg-secondary: #1a1a1a;
    --bg-accent: #0a0a0a;
    --text-primary: #ffffff;
    --text-secondary: #ffff00;
    /* Yellow for secondary text */
    --text-accent: #ffff00;
    --border-color: #ffffff;

    /* High visibility colors */
    --color-green-700: #ffff00;
    --color-green-500: #ffff00;
    --color-green-300: #ffff00;
    --color-amber-700: #ffff00;

    /* Remove gradients and use solid colors */
    --bg-gradient: #000000;
}

[data-theme="high-contrast"] .btn-primary {
    background-color: #ffff00;
    color: #000000;
    border: 2px solid #ffffff;
}

[data-theme="high-contrast"] .btn-primary:hover {
    background-color: #ffffff;
    color: #000000;
}

[data-theme="high-contrast"] .btn-outline {
    background-color: transparent;
    color: #ffff00;
    border: 2px solid #ffff00;
}

[data-theme="high-contrast"] .btn-outline:hover {
    background-color: #ffff00;
    color: #000000;
}

[data-theme="high-contrast"] .card {
    background-color: #000000;
    border: 2px solid #ffffff;
    box-shadow: none;
}

[data-theme="high-contrast"] .navbar {
    background-color: #000000;
    border-bottom: 2px solid #ffffff;
}

[data-theme="high-contrast"] a {
    color: #ffff00;
    text-decoration: underline;
}

[data-theme="high-contrast"] a:hover {
    color: #ffffff;
}

[data-theme="high-contrast"] .badge {
    background-color: #000000;
    color: #ffff00;
    border: 2px solid #ffff00;
}

[data-theme="high-contrast"] *:focus {
    outline: 3px solid #ffff00;
    outline-offset: 3px;
}

/* Remove all gradients and backgrounds */
[data-theme="high-contrast"] .hero {
    background: #000000 !important;
    background-image: none !important;
}

[data-theme="high-contrast"] .section {
    background: #000000 !important;
    background-image: none !important;
}

/* Force remove all gradient backgrounds from cards */
[data-theme="high-contrast"] [style*="gradient"] {
    background: #000000 !important;
    background-image: none !important;
}

[data-theme="high-contrast"] [style*="background"] {
    background-color: #000000 !important;
}

[data-theme="high-contrast"] div[style*="background: linear-gradient"],
[data-theme="high-contrast"] div[style*="background-color"] {
    background: #000000 !important;
    background-image: none !important;
}

[data-theme="high-contrast"] .footer {
    background-color: #000000;
    border-top: 2px solid #ffffff;
}

/* Ensure high contrast for all interactive elements */
[data-theme="high-contrast"] button {
    border: 2px solid #ffffff;
}

[data-theme="high-contrast"] input,
[data-theme="high-contrast"] select,
[data-theme="high-contrast"] textarea {
    background-color: #000000;
    color: #ffffff;
    border: 2px solid #ffffff;
}

[data-theme="high-contrast"] .theme-toggle {
    background-color: transparent;
    border: 2px solid #ffff00;
}

[data-theme="high-contrast"] .mobile-menu {
    background-color: #000000;
    border: 2px solid #ffffff;
}

/* High contrast for specific components */
[data-theme="high-contrast"] .stat-card,
[data-theme="high-contrast"] .feature-card {
    background-color: #000000;
    border: 2px solid #ffffff;
}

[data-theme="high-contrast"] h1,
[data-theme="high-contrast"] h2,
[data-theme="high-contrast"] h3 {
    color: #ffffff;
}

[data-theme="high-contrast"] .accent {
    color: #ffff00 !important;
}

[data-theme="high-contrast"] code,
[data-theme="high-contrast"] pre {
    background-color: #1a1a1a;
    border: 1px solid #ffffff;
    color: #ffff00;
}

/* ============================================
   Base Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* Font Size Control Classes */
html.font-small {
    font-size: 14px;
}

html.font-normal {
    font-size: 16px;
}

html.font-large {
    font-size: 18px;
}

html.font-xlarge {
    font-size: 20px;
}

/* Font Size Adjustments for Navigation */
html.font-large .navbar-container,
html.font-xlarge .navbar-container {
    height: auto;
    min-height: 4rem;
    padding: 0.75rem var(--spacing-4);
}

html.font-large .navbar-menu,
html.font-xlarge .navbar-menu {
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

html.font-large .navbar-logo,
html.font-xlarge .navbar-logo {
    font-size: var(--font-size-lg);
}

html.font-large .btn-primary,
html.font-xlarge .btn-primary {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

/* Dyslexia-Friendly Font */
body.dyslexia-friendly {
    font-family: 'OpenDyslexic', Arial, sans-serif !important;
}

body.dyslexia-friendly * {
    font-family: 'OpenDyslexic', Arial, sans-serif !important;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* ============================================
   Accessibility Features  
   ============================================ */

/* Skip Navigation Link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background-color: var(--color-green-700);
    color: var(--color-white);
    padding: var(--spacing-3) var(--spacing-6);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    border-radius: 0 0 var(--radius-lg) 0;
    z-index: 9999;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* Enhanced Focus Indicators for Keyboard Navigation */
*:focus {
    outline: 3px solid var(--color-green-500);
    outline-offset: 2px;
}

[data-theme="dark"] *:focus {
    outline-color: var(--color-green-300);
}

/* Button and link focus styles */
.btn:focus,
a:focus {
    outline: 3px solid var(--color-green-500);
    outline-offset: 2px;
}

[data-theme="dark"] .btn:focus,
[data-theme="dark"] a:focus {
    outline-color: var(--color-green-300);
}


/* ============================================
   Typography
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: var(--spacing-4);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
}

h5 {
    font-size: var(--font-size-lg);
}

h6 {
    font-size: var(--font-size-base);
}

p {
    margin-bottom: var(--spacing-4);
    color: var(--text-secondary);
}

a {
    color: var(--text-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-green-800);
}

/* ============================================
   Layout Utilities
   ============================================ */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.section {
    padding: var(--spacing-20) 0;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-6);
}

.grid-cols-1 {
    grid-template-columns: repeat(1, 1fr);
}

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

.grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Flexbox Utilities */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

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

.gap-4 {
    gap: var(--spacing-4);
}

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

.gap-8 {
    gap: var(--spacing-8);
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.navbar-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

.navbar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    text-decoration: none;
}

.navbar-logo svg {
    width: 2rem;
    height: 2rem;
    color: var(--text-accent);
}

.navbar-menu {
    display: none;
    gap: var(--spacing-8);
    list-style: none;
}

.navbar-menu a {
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
}

.navbar-menu a:hover,
.navbar-menu a.active {
    color: var(--text-accent);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.theme-toggle {
    background: none;
    border: none;
    padding: var(--spacing-2);
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast);
}

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

.mobile-menu-btn {
    display: flex;
    background: none;
    border: none;
    padding: var(--spacing-2);
    cursor: pointer;
    color: var(--text-secondary);
}

.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-4);
}

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

.mobile-menu-list {
    list-style: none;
}

.mobile-menu-list a {
    display: block;
    padding: var(--spacing-3) var(--spacing-4);
    color: var(--text-secondary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.mobile-menu-list a:hover,
.mobile-menu-list a.active {
    background-color: var(--bg-accent);
    color: var(--text-accent);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--color-green-700);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: var(--color-green-800);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-accent);
    border-color: var(--border-hover);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-accent);
    border: 1px solid var(--text-accent);
}

.btn-outline:hover {
    background-color: var(--color-green-50);
}

/* ============================================
   Cards
   ============================================ */
.card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.card-header {
    margin-bottom: var(--spacing-4);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-2);
}

.card-description {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    background: linear-gradient(to bottom, var(--color-amber-50), var(--color-green-50), var(--color-white));
    padding: var(--spacing-20) 0;
    text-align: center;
}



.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    background-color: var(--color-green-50);
    color: var(--color-green-800);
    border: 1px solid var(--color-green-200);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-6);
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-6);
    line-height: 1.1;
}

.hero-title .accent {
    color: var(--text-accent);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 42rem;
    margin: 0 auto var(--spacing-8);
}

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

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
    margin-top: var(--spacing-16);
    padding-top: var(--spacing-16);
    border-top: 1px solid var(--border-color);
}

.hero-stat-number {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-1);
}

.hero-stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ============================================
   Badge
   ============================================ */
.badge {
    display: inline-block;
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    border: 1px solid;
}

.badge-green {
    background-color: var(--color-green-100);
    color: var(--color-green-800);
    border-color: var(--color-green-200);
}

.badge-amber {
    background-color: var(--color-amber-100);
    color: var(--color-amber-800);
    border-color: var(--color-amber-200);
}

.badge-gray {
    background-color: var(--color-gray-100);
    color: var(--color-gray-800);
    border-color: var(--color-gray-200);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-12) 0 var(--spacing-6);
    margin-top: var(--spacing-20);
}

.footer-content {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-8);
}

.footer-section h4 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-4);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-2);
}

.footer-links a {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.footer-links a:hover {
    color: var(--text-accent);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (min-width: 640px) {
    .hero-title {
        font-size: var(--font-size-6xl);
    }

    .hero-actions {
        flex-direction: row;
    }
}

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

    .mobile-menu-btn {
        display: none;
    }

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

    .grid-md-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-lg-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .grid-lg-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center {
    text-align: center;
}

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

.text-right {
    text-align: right;
}

.mb-2 {
    margin-bottom: var(--spacing-2);
}

.mb-4 {
    margin-bottom: var(--spacing-4);
}

.mb-6 {
    margin-bottom: var(--spacing-6);
}

.mb-8 {
    margin-bottom: var(--spacing-8);
}

.mb-12 {
    margin-bottom: var(--spacing-12);
}

.mt-8 {
    margin-top: var(--spacing-8);
}

.mt-12 {
    margin-top: var(--spacing-12);
}

.mt-16 {
    margin-top: var(--spacing-16);
}

.hidden {
    display: none;
}

/* ============================================
   Accessibility Toolbar
   ============================================ */
.a11y-toolbar {
    position: fixed;
    bottom: var(--spacing-6);
    right: var(--spacing-6);
    z-index: 1000;
}

.a11y-toggle {
    width: 3.5rem;
    height: 3.5rem;
    border-radius: var(--radius-full);
    background-color: var(--color-green-700);
    color: var(--color-white);
    border: none;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.a11y-toggle:hover {
    background-color: var(--color-green-800);
    transform: scale(1.1);
}

.a11y-toggle:focus {
    outline: 3px solid var(--color-white);
    outline-offset: 2px;
}

.a11y-panel {
    position: absolute;
    bottom: 4.5rem;
    right: 0;
    min-width: 16rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-4);
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.2s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.a11y-panel h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
}

.a11y-option {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-2);
}

.a11y-option:hover:not(:disabled) {
    background-color: var(--bg-accent);
    border-color: var(--color-green-700);
}

.a11y-option:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.a11y-option svg {
    flex-shrink: 0;
    color: var(--color-green-700);
}

/* Accessibility panel sections */
.a11y-section {
    margin-bottom: var(--spacing-4);
    padding-bottom: var(--spacing-4);
    border-bottom: 1px solid var(--border-color);
}

.a11y-section:last-child {
    border-bottom: none;
}

.a11y-section h4 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Font size buttons */
.a11y-btn {
    flex: 1;
    padding: var(--spacing-2) var(--spacing-3);
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.a11y-btn:hover {
    background-color: var(--bg-accent);
    border-color: var(--color-green-700);
    color: var(--color-green-700);
}

.a11y-btn:active {
    transform: scale(0.95);
}

/* Dark mode adjustments */
[data-theme="dark"] .a11y-panel {
    background-color: var(--bg-secondary);
}
/* ============================================
   Enhanced Mobile Responsiveness
   Multiple Breakpoints: 320px, 480px, 768px, 1024px, 1440px
   ============================================ */

/* Extra Small Devices (320px - 479px) - Small phones */
@media (max-width: 479px) {
    :root {
        --font-size-3xl: 1.5rem;
        --font-size-4xl: 1.75rem;
        --font-size-5xl: 2rem;
        --spacing-12: 2rem;
        --spacing-16: 2.5rem;
        --spacing-20: 3rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .hero-title {
        font-size: 2rem !important;
    }
    
    .navbar-menu {
        display: none;
    }
}

/* Small Devices (480px - 767px) - Large phones */
@media (min-width: 480px) and (max-width: 767px) {
    .hero-title {
        font-size: 2.5rem !important;
    }
}

/* Medium Devices (768px - 1023px) - Tablets */
@media (min-width: 768px) and (max-width: 1023px) {
    .grid-md-2 {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    .navbar-menu {
        gap: 1.5rem;
    }
}

/* Large Devices (1024px - 1439px) - Laptops */
@media (min-width: 1024px) and (max-width: 1439px) {
    .container {
        max-width: 960px;
    }
    
    .grid-lg-3 {
        grid-template-columns: repeat(3, 1fr) !important;
    }
}

/* Extra Large Devices (1440px+) - Desktops */
@media (min-width: 1440px) {
    .container {
        max-width: 1280px;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .card,
    .navbar-menu a {
        min-height: 44px; /* iOS touch target */
        padding: 0.75rem 1.25rem;
    }
}

/* Orientation-specific */
@media (orientation: landscape) and (max-height: 500px) {
    .hero {
        padding: 2rem 0;
    }
}