/* ============================================
   Space4All Education - Main Stylesheet
   ============================================ */

/* CSS Variables for Easy Customization */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --secondary-dark: #059669;
    --secondary-light: #34d399;
    --teacher-color: #f59e0b;
    --teacher-dark: #d97706;
    --teacher-light: #fbbf24;
    --student-color: #8b5cf6;
    --student-dark: #7c3aed;
    --student-light: #a78bfa;
    --free-color: #ef4444;
    --free-dark: #dc2626;
    --free-light: #f87171;
    --dark-bg: #1e293b;
    --light-bg: #f8fafc;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --white: #ffffff;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-colored: 0 10px 30px -5px rgba(37, 99, 235, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 30px;
    --font-size-4xl: 36px;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-teacher: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --gradient-student: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
}

/* Dark Mode Variables */
.dark-mode {
    --dark-bg: #0f172a;
    --light-bg: #1e293b;
    --text-dark: #f1f5f9;
    --text-light: #cbd5e1;
    --white: #1e293b;
    --border-color: #334155;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

.dark-mode .header,
.dark-mode .content-card,
.dark-mode .quick-card,
.dark-mode .resource-card,
.dark-mode .feature-card {
    background: var(--white);
}

/* High Contrast Mode */
.high-contrast {
    --primary-color: #0000ff;
    --secondary-color: #008000;
    --text-dark: #000000;
    --text-light: #000000;
    --light-bg: #ffffff;
    --border-color: #000000;
}

/* Readable Font Mode */
.readable-font {
    font-family: 'Comic Sans MS', 'Arial', sans-serif;
}

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: #0a0e27;
    background: linear-gradient(180deg, #0a0e27 0%, #1a1f3a 50%, #0f172a 100%);
    background-attachment: fixed;
    transition: var(--transition);
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(37, 99, 235, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
        url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="20" cy="20" r="1" fill="white" opacity="0.3"/><circle cx="80" cy="40" r="1" fill="white" opacity="0.3"/><circle cx="50" cy="70" r="1" fill="white" opacity="0.3"/><circle cx="30" cy="90" r="1" fill="white" opacity="0.3"/><circle cx="70" cy="10" r="1" fill="white" opacity="0.3"/></svg>');
    background-size: 200px 200px;
    pointer-events: none;
    z-index: -1;
    opacity: 0.5;
}

/* Accessibility Toolbar */
.accessibility-toolbar {
    position: fixed;
    top: 0;
    right: 0;
    background: var(--dark-bg);
    padding: 10px;
    z-index: 1000;
    display: flex;
    gap: 5px;
    border-bottom-left-radius: 8px;
    box-shadow: var(--shadow-lg);
    flex-wrap: wrap;
    max-width: 300px;
}

.accessibility-toolbar button {
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

.accessibility-toolbar button:hover {
    background: var(--secondary-color);
    transform: scale(1.05);
}

.accessibility-toolbar button:focus {
    outline: 3px solid var(--white);
    outline-offset: 2px;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
.header {
    background: rgba(10, 14, 39, 0.8);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    position: sticky;
    top: 0;
    z-index: 999;
    padding-top: 50px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.header:hover {
    background: rgba(10, 14, 39, 0.95);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--white);
    font-size: var(--font-size-xl);
    font-weight: bold;
    text-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
    transition: var(--transition);
}

.logo a:hover {
    color: var(--student-color);
    text-shadow: 0 0 30px rgba(139, 92, 246, 0.8);
    transform: scale(1.05);
}

.logo i {
    font-size: var(--font-size-2xl);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    transition: var(--transition);
    font-size: var(--font-size-lg);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--white);
    text-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    box-shadow: var(--shadow-lg);
    border-radius: 8px;
    list-style: none;
    min-width: 200px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    margin-top: 10px;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    display: block;
    padding: 10px 20px;
    color: var(--text-dark);
}

.dropdown-menu a:hover {
    background: var(--light-bg);
    color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--text-dark);
}

/* Hero Section - Space Theme */
.hero {
    background: #000428;
    background: linear-gradient(135deg, #000428 0%, #004e92 100%);
    color: var(--white);
    padding: 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Video Background */
.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    z-index: 0;
    object-fit: cover;
}

/* Video Overlay */
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(180deg, rgba(0, 4, 40, 0.7) 0%, rgba(0, 78, 146, 0.6) 100%),
        radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 0.3) 0%, transparent 70%);
    z-index: 1;
    pointer-events: none;
}

/* Space Particles */
.space-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
    overflow: hidden;
}

.space-particles::before,
.space-particles::after {
    content: '';
    position: absolute;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    box-shadow: 
        10% 20% 0 0 white,
        30% 10% 0 0 white,
        50% 40% 0 0 white,
        70% 30% 0 0 white,
        90% 50% 0 0 white,
        20% 60% 0 0 white,
        40% 70% 0 0 white,
        60% 80% 0 0 white,
        80% 90% 0 0 white,
        15% 25% 0 0 rgba(255, 255, 255, 0.8),
        35% 45% 0 0 rgba(255, 255, 255, 0.8),
        55% 65% 0 0 rgba(255, 255, 255, 0.8),
        75% 85% 0 0 rgba(255, 255, 255, 0.8),
        95% 15% 0 0 rgba(255, 255, 255, 0.8);
    animation: twinkle 3s ease-in-out infinite;
}

.space-particles::before {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.space-particles::after {
    top: 60%;
    left: 80%;
    animation-delay: 1.5s;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.5); }
}

/* Floating Planets */
.floating-planet {
    position: absolute;
    border-radius: 50%;
    z-index: 2;
    pointer-events: none;
    filter: blur(1px);
}

.planet-1 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle at 30% 30%, rgba(139, 92, 246, 0.4), rgba(99, 102, 241, 0.2));
    top: 10%;
    right: 10%;
    animation: floatPlanet 20s ease-in-out infinite;
    box-shadow: 0 0 100px rgba(139, 92, 246, 0.5);
}

.planet-2 {
    width: 200px;
    height: 200px;
    background: radial-gradient(circle at 30% 30%, rgba(16, 185, 129, 0.4), rgba(5, 150, 105, 0.2));
    bottom: 15%;
    left: 15%;
    animation: floatPlanet 25s ease-in-out infinite reverse;
    box-shadow: 0 0 80px rgba(16, 185, 129, 0.5);
}

.planet-3 {
    width: 150px;
    height: 150px;
    background: radial-gradient(circle at 30% 30%, rgba(245, 158, 11, 0.4), rgba(217, 119, 6, 0.2));
    top: 50%;
    left: 5%;
    animation: floatPlanet 18s ease-in-out infinite;
    box-shadow: 0 0 60px rgba(245, 158, 11, 0.5);
}

@keyframes floatPlanet {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -30px) scale(1.1);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.9);
    }
    75% {
        transform: translate(20px, 30px) scale(1.05);
    }
}

/* Hero Content */
.hero-content {
    position: relative;
    z-index: 3;
    width: 100%;
    max-width: 1200px;
    padding: 0 20px;
}

.hero-inner {
    position: relative;
    z-index: 1;
    padding: 120px 0 80px;
}

/* Rocket Animation */
.rocket-container {
    position: relative;
    margin: 0 auto 3rem;
    width: 120px;
    height: 120px;
    animation: rocketFloat 3s ease-in-out infinite;
}

.rocket-icon {
    font-size: 80px;
    color: var(--white);
    position: relative;
    z-index: 2;
    filter: drop-shadow(0 0 20px rgba(255, 255, 255, 0.8));
    animation: rocketPulse 2s ease-in-out infinite;
    display: block;
}

.rocket-trail {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 60px;
    background: linear-gradient(180deg, 
        rgba(255, 255, 255, 0.8) 0%,
        rgba(37, 99, 235, 0.6) 50%,
        transparent 100%);
    border-radius: 2px;
    animation: trailFlicker 1s ease-in-out infinite;
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.8);
}

@keyframes rocketFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

@keyframes rocketPulse {
    0%, 100% { transform: scale(1); filter: drop-shadow(0 0 20px rgba(255, 255, 255, 0.8)); }
    50% { transform: scale(1.1); filter: drop-shadow(0 0 30px rgba(37, 99, 235, 1)); }
}

@keyframes trailFlicker {
    0%, 100% { opacity: 0.8; height: 60px; }
    50% { opacity: 1; height: 80px; }
}

/* Hero Title */
.hero-title {
    font-size: clamp(2.5rem, 6vw, 5rem);
    margin-bottom: 1.5rem;
    font-weight: 900;
    letter-spacing: -0.02em;
    text-shadow: 
        0 0 20px rgba(255, 255, 255, 0.5),
        0 4px 20px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 0.8s ease-out;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.title-line {
    font-size: 0.5em;
    font-weight: 400;
    opacity: 0.9;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.title-main {
    background: linear-gradient(135deg, #ffffff 0%, #a78bfa 50%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradientShift 5s ease infinite, fadeInUp 0.8s ease-out 0.2s both;
    filter: drop-shadow(0 0 30px rgba(139, 92, 246, 0.5));
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    margin-bottom: 3rem;
    opacity: 0.95;
    font-weight: 300;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 0.8s ease-out 0.4s both;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

/* Space Buttons */
.btn-space {
    position: relative;
    overflow: visible;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-space::before {
    display: none;
}

.btn-space:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-5px) scale(1.05);
    box-shadow: 
        0 15px 40px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        0 0 30px rgba(255, 255, 255, 0.3);
}

.btn-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.4), transparent);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
    pointer-events: none;
    z-index: -1;
}

.btn-space:hover .btn-glow {
    width: 200px;
    height: 200px;
}

.btn-teacher.btn-space {
    background: rgba(245, 158, 11, 0.2);
    border-color: rgba(245, 158, 11, 0.5);
}

.btn-teacher.btn-space:hover {
    background: rgba(245, 158, 11, 0.3);
    box-shadow: 
        0 15px 40px rgba(245, 158, 11, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        0 0 30px rgba(245, 158, 11, 0.6);
}

.btn-student.btn-space {
    background: rgba(139, 92, 246, 0.2);
    border-color: rgba(139, 92, 246, 0.5);
}

.btn-student.btn-space:hover {
    background: rgba(139, 92, 246, 0.3);
    box-shadow: 
        0 15px 40px rgba(139, 92, 246, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        0 0 30px rgba(139, 92, 246, 0.6);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 20px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 10px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 2px;
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollWheel 2s ease-in-out infinite;
}

@keyframes scrollWheel {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(20px); }
}

.arrow {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.arrow span {
    width: 8px;
    height: 8px;
    border-right: 2px solid rgba(255, 255, 255, 0.8);
    border-bottom: 2px solid rgba(255, 255, 255, 0.8);
    transform: rotate(45deg);
    animation: arrowBounce 2s ease-in-out infinite;
}

.arrow span:nth-child(2) {
    animation-delay: 0.2s;
}

.arrow span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes arrowBounce {
    0%, 100% { opacity: 0.3; transform: rotate(45deg) translateY(0); }
    50% { opacity: 1; transform: rotate(45deg) translateY(5px); }
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    margin-bottom: 3rem;
    opacity: 0.95;
    font-weight: 400;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-lg);
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    min-height: 48px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn:focus {
    outline: 3px solid var(--white);
    outline-offset: 3px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    box-shadow: 0 10px 30px -5px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 40px -5px rgba(37, 99, 235, 0.5);
}

.btn-teacher {
    background: linear-gradient(135deg, var(--teacher-color) 0%, var(--teacher-dark) 100%);
    color: var(--white);
    font-size: var(--font-size-xl);
    padding: 20px 40px;
    box-shadow: 0 10px 30px -5px rgba(245, 158, 11, 0.4);
}

.btn-teacher:hover {
    background: linear-gradient(135deg, var(--teacher-dark) 0%, var(--teacher-color) 100%);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 40px -5px rgba(245, 158, 11, 0.5);
}

.btn-student {
    background: linear-gradient(135deg, var(--student-color) 0%, var(--student-dark) 100%);
    color: var(--white);
    font-size: var(--font-size-xl);
    padding: 20px 40px;
    box-shadow: 0 10px 30px -5px rgba(139, 92, 246, 0.4);
}

.btn-student:hover {
    background: linear-gradient(135deg, var(--student-dark) 0%, var(--student-color) 100%);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 40px -5px rgba(139, 92, 246, 0.5);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    position: relative;
    overflow: hidden;
}

.btn-outline::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    transition: left 0.3s ease;
    z-index: -1;
}

.btn-outline:hover {
    color: var(--white);
    border-color: var(--primary-color);
}

.btn-outline:hover::after {
    left: 0;
}

/* Quick Access Section */
.quick-access {
    padding: 80px 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
    position: relative;
}

.quick-access::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.section-title {
    text-align: center;
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 3rem;
    color: var(--white);
    font-weight: 800;
    letter-spacing: -0.02em;
    position: relative;
    display: inline-block;
    width: 100%;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.5);
}

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

.quick-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.quick-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.quick-card:hover::before {
    transform: scaleX(1);
}

.quick-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: rgba(37, 99, 235, 0.2);
}

.quick-icon {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    font-size: var(--font-size-4xl);
    color: var(--white);
    position: relative;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.quick-icon::before {
    content: '';
    position: absolute;
    inset: -5px;
    border-radius: 50%;
    padding: 5px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.1));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: var(--transition);
}

.quick-card:hover .quick-icon {
    transform: scale(1.1) rotate(5deg);
}

.quick-card:hover .quick-icon::before {
    opacity: 1;
    animation: rotate 3s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.teacher-icon {
    background: var(--teacher-color);
}

.student-icon {
    background: var(--student-color);
}

.free-icon {
    background: var(--free-color);
}

.quick-card h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: 1rem;
    color: var(--white);
    font-weight: 700;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.quick-card p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1.5rem;
    font-size: var(--font-size-lg);
    line-height: 1.8;
}

.highlight-card {
    border: 3px solid var(--free-color);
    position: relative;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.05), rgba(239, 68, 68, 0.02));
}

.highlight-card::before {
    content: "FREE";
    position: absolute;
    top: -15px;
    right: 20px;
    background: linear-gradient(135deg, var(--free-color), var(--free-dark));
    color: var(--white);
    padding: 8px 20px;
    border-radius: 25px;
    font-weight: bold;
    font-size: 14px;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
    text-transform: uppercase;
    letter-spacing: 1px;
    animation: pulse 2s ease-in-out infinite;
    z-index: 10;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02) 0%, rgba(255, 255, 255, 0.05) 100%);
    position: relative;
}

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

.feature-card {
    text-align: center;
    padding: 2.5rem 2rem;
    border-radius: 20px;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.feature-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover::after {
    opacity: 1;
}

.feature-card:hover {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(16, 185, 129, 0.05));
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.feature-card i {
    font-size: var(--font-size-4xl);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
    display: inline-block;
    transition: var(--transition);
    filter: drop-shadow(0 4px 8px rgba(37, 99, 235, 0.2));
}

.feature-card:hover i {
    transform: scale(1.2) rotate(5deg);
    filter: drop-shadow(0 6px 12px rgba(37, 99, 235, 0.4));
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: 0.5rem;
    color: var(--white);
    font-weight: 700;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.feature-card p {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-lg);
    line-height: 1.8;
}

/* Popular Resources */
.popular-resources {
    padding: 60px 0;
    background: var(--light-bg);
}

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

.resource-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
}

.resource-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(16, 185, 129, 0.05));
    opacity: 0;
    transition: var(--transition);
    z-index: 0;
}

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

.resource-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.resource-card > * {
    position: relative;
    z-index: 1;
}

.resource-image {
    width: 100%;
    height: 220px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--primary-color) 100%);
    background-size: 200% 200%;
    animation: gradientShift 8s ease infinite;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-4xl);
    position: relative;
    overflow: hidden;
}

.resource-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.resource-image i {
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
    transition: var(--transition);
}

.resource-card:hover .resource-image i {
    transform: scale(1.2) rotate(5deg);
}

.resource-content {
    padding: 1.5rem;
}

.resource-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--free-color), var(--free-dark));
    color: var(--white);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: bold;
    margin-bottom: 0.5rem;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    animation: pulse 2s ease-in-out infinite;
}

.resource-content h3 {
    font-size: var(--font-size-xl);
    margin-bottom: 0.5rem;
    color: var(--white);
    font-weight: 700;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.resource-content p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1rem;
    font-size: var(--font-size-base);
    line-height: 1.8;
}

.resource-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.resource-meta i {
    margin-right: 5px;
    color: rgba(255, 255, 255, 0.5);
}

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

/* Footer */
.footer {
    background: linear-gradient(180deg, rgba(10, 14, 39, 0.95) 0%, #000428 100%);
    color: var(--white);
    padding: 40px 0 20px;
    position: relative;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

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

.footer-col h3,
.footer-col h4 {
    margin-bottom: 1rem;
    font-size: var(--font-size-xl);
}

.footer-col p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 0.5rem;
}

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
    font-size: var(--font-size-lg);
}

.footer-col ul li a:hover {
    color: var(--white);
    padding-left: 5px;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
    font-size: var(--font-size-lg);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* Page Specific Styles */
.page-header {
    background: var(--gradient-hero);
    background-size: 200% 200%;
    animation: gradientShift 15s ease infinite;
    color: var(--white);
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.page-header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 1;
}

.page-header p {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    opacity: 0.95;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.page-content {
    padding: 60px 0;
}

.content-section {
    margin-bottom: 4rem;
}

.content-section h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    padding-bottom: 1rem;
    border-bottom: 3px solid var(--primary-color);
}

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

.content-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.content-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.content-card:hover::before {
    transform: scaleY(1);
}

.content-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.content-card h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.content-card ul {
    list-style: none;
    padding-left: 0;
}

.content-card ul li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    font-size: var(--font-size-lg);
}

.content-card ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

/* Filter Section */
.filter-section {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.filter-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}

.filter-group label {
    font-weight: 600;
    color: var(--text-dark);
    font-size: var(--font-size-lg);
}

.filter-group select,
.filter-group input {
    padding: 10px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: var(--font-size-base);
    min-height: 48px;
}

.filter-group select:focus,
.filter-group input:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
    border-color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --font-size-4xl: 28px;
        --font-size-3xl: 24px;
        --font-size-2xl: 20px;
        --font-size-xl: 18px;
    }

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

    .nav-menu {
        position: fixed;
        top: 100px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 100px);
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        left: 0;
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        margin-top: 0;
        padding-left: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn-teacher,
    .btn-student {
        width: 100%;
        justify-content: center;
    }

    .quick-access-grid,
    .features-grid,
    .resources-grid,
    .content-grid {
        grid-template-columns: 1fr;
    }

    .accessibility-toolbar {
        flex-wrap: wrap;
        max-width: 200px;
    }

    .accessibility-toolbar button {
        font-size: 12px;
        padding: 6px 10px;
    }
}

/* Print Styles */
@media print {
    .accessibility-toolbar,
    .header,
    .footer {
        display: none;
    }
}

/* ============================================
   ADVANCED FEATURES
   ============================================ */

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-20px) scale(1.1);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
    }
    50% { 
        transform: scale(1.05);
        box-shadow: 0 6px 20px rgba(239, 68, 68, 0.6);
    }
}

@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-slide-in {
    animation: slideInRight 0.6s ease-out;
}

/* Scroll Animations */
.fade-in-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* User Account Section */
.user-account {
    position: relative;
}

.user-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow-lg);
    border-radius: 8px;
    min-width: 200px;
    padding: 10px 0;
    margin-top: 10px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
}

.user-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-menu a {
    display: block;
    padding: 10px 20px;
    color: var(--text-dark);
    text-decoration: none;
    transition: var(--transition);
}

.user-menu a:hover {
    background: var(--light-bg);
    color: var(--primary-color);
}

.login-modal,
.signup-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.login-modal.active,
.signup-modal.active {
    display: flex;
}

.modal-content {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    max-width: 450px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: fadeInUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    position: relative;
}

.modal-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px 20px 0 0;
}

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

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-dark);
}

/* Statistics Dashboard */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    background-size: 200% 200%;
    animation: gradientShift 5s ease infinite;
    color: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-xl), 0 0 40px rgba(37, 99, 235, 0.2);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    transition: var(--transition);
}

.stat-card:hover::before {
    top: -30%;
    right: -30%;
}

.stat-card:hover {
    transform: translateY(-8px) scale(1.03);
    box-shadow: var(--shadow-xl), 0 0 60px rgba(37, 99, 235, 0.3);
}

.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: var(--font-size-lg);
    opacity: 0.9;
}

/* Testimonials */
.testimonials-section {
    padding: 60px 0;
    background: var(--light-bg);
}

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

.testimonial-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    position: relative;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.testimonial-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.testimonial-card:hover::after {
    transform: scaleX(1);
}

.testimonial-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: 20px;
    font-size: 80px;
    color: var(--primary-color);
    opacity: 0.2;
    font-family: Georgia, serif;
}

.testimonial-text {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: bold;
    font-size: var(--font-size-xl);
    box-shadow: var(--shadow-md);
    border: 3px solid var(--white);
    transition: var(--transition);
}

.testimonial-card:hover .author-avatar {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.author-info h4 {
    margin-bottom: 0.25rem;
    color: var(--text-dark);
}

.author-info p {
    color: var(--text-light);
    font-size: var(--font-size-base);
}

/* Newsletter Section */
.newsletter-section {
    background: var(--gradient-hero);
    background-size: 200% 200%;
    animation: gradientShift 15s ease infinite;
    color: var(--white);
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.newsletter-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.newsletter-form {
    max-width: 500px;
    margin: 2rem auto 0;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.newsletter-form input {
    flex: 1;
    min-width: 250px;
    padding: 14px 20px;
    border: none;
    border-radius: 8px;
    font-size: var(--font-size-base);
    min-height: 48px;
}

.newsletter-form input:focus {
    outline: 3px solid var(--white);
    outline-offset: 2px;
}

/* Resource Actions */
.resource-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.resource-actions button {
    flex: 1;
    min-width: 100px;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: var(--font-size-base);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-favorite {
    background: var(--light-bg);
    color: var(--text-dark);
}

.btn-favorite:hover,
.btn-favorite.active {
    background: var(--free-color);
    color: var(--white);
}

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

.btn-download:hover {
    background: #1d4ed8;
}

.btn-preview {
    background: var(--secondary-color);
    color: var(--white);
}

.btn-preview:hover {
    background: #059669;
}

/* Progress Tracking */
.progress-section {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.progress-item {
    margin-bottom: 1.5rem;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: var(--border-color);
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    transition: width 0.6s ease-out;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 10px;
    color: var(--white);
    font-size: 12px;
    font-weight: bold;
}

/* Favorites Section */
.favorites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: var(--border-color);
}

/* Loading States */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--white);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.skeleton {
    background: linear-gradient(90deg, var(--light-bg) 25%, var(--border-color) 50%, var(--light-bg) 75%);
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--white);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 300px;
    animation: slideInRight 0.3s ease-out;
    border-left: 4px solid var(--primary-color);
}

.toast.success {
    border-left-color: var(--secondary-color);
}

.toast.error {
    border-left-color: var(--free-color);
}

.toast-icon {
    font-size: var(--font-size-xl);
}

/* Advanced Filter */
.advanced-filter {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.filter-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 6px 12px;
    background: var(--light-bg);
    border-radius: 20px;
    font-size: var(--font-size-base);
}

.filter-tag button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-light);
    font-size: var(--font-size-lg);
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.filter-tag button:hover {
    color: var(--text-dark);
}

/* Dark Mode Toggle */
.dark-mode-toggle {
    background: var(--dark-bg);
    color: var(--white);
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

.dark-mode-toggle:hover {
    background: var(--primary-color);
}

/* Smooth Scroll */
html {
    scroll-behavior: smooth;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    box-shadow: var(--shadow-lg);
    z-index: 999;
    transition: var(--transition);
}

.back-to-top.visible {
    display: flex;
}

.back-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-5px);
}