/* ========================================
   DESIGN SYSTEM & CSS VARIABLES
   ======================================== */
:root {
    /* Colors */
    --primary-h: 160;
    --primary-s: 84%;
    --primary-l: 39%;
    --primary: hsl(var(--primary-h), var(--primary-s), var(--primary-l));
    --primary-light: hsl(var(--primary-h), var(--primary-s), 92%);
    --primary-dark: hsl(var(--primary-h), var(--primary-s), 28%);

    --accent-h: 210;
    --accent-s: 78%;
    --accent-l: 56%;
    --accent: hsl(var(--accent-h), var(--accent-s), var(--accent-l));
    --accent-light: hsl(var(--accent-h), var(--accent-s), 90%);

    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-tertiary: #1a2332;
    --bg-card: rgba(17, 24, 39, 0.7);
    --bg-card-hover: rgba(26, 35, 50, 0.9);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border-color: rgba(148, 163, 184, 0.1);
    --border-glow: rgba(45, 212, 140, 0.3);

    --gradient-1: linear-gradient(135deg, #2dd48c 0%, #1e9bff 100%);
    --gradient-2: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);
    --gradient-3: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --gradient-text: linear-gradient(135deg, #2dd48c 0%, #38bdf8 50%, #818cf8 100%);

    --danger: #ef4444;
    --warning: #f59e0b;
    --success: #22c55e;

    /* Spacing */
    --section-padding: 120px;
    --container-max: 1200px;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(45, 212, 140, 0.15);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* ========================================
   RESET & BASE
   ======================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Cairo', 'Tajawal', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

::selection {
    background: rgba(45, 212, 140, 0.3);
    color: var(--text-primary);
}

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

ul { list-style: none; }

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

/* ========================================
   CONTAINER
   ======================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   PARTICLES
   ======================================== */
.particles {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat linear infinite;
}

@keyframes particleFloat {
    0% {
        opacity: 0;
        transform: translateY(100vh) scale(0);
    }
    10% { opacity: 0.6; }
    90% { opacity: 0.2; }
    100% {
        opacity: 0;
        transform: translateY(-10vh) scale(1);
    }
}

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition-medium);
    backdrop-filter: blur(0px);
}

.navbar.scrolled {
    padding: 10px 0;
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.1rem;
}

.logo-icon {
    width: 36px;
    height: 36px;
    color: var(--primary);
}

.logo-icon.small {
    width: 28px;
    height: 28px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links a {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
    background: rgba(45, 212, 140, 0.08);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 120px 24px 80px;
}

.hero-bg-shapes {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.12;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: var(--primary);
    top: -200px;
    right: -200px;
    animation: shapeFloat 20s ease-in-out infinite;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--accent);
    bottom: -100px;
    left: -100px;
    animation: shapeFloat 15s ease-in-out infinite reverse;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: #818cf8;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: shapeFloat 25s ease-in-out infinite;
}

@keyframes shapeFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(10px, 10px) scale(1.02); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    border-radius: 50px;
    background: rgba(45, 212, 140, 0.1);
    border: 1px solid rgba(45, 212, 140, 0.2);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 60px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition-medium);
}

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

.btn-primary {
    background: var(--gradient-1);
    color: #fff;
    box-shadow: 0 4px 20px rgba(45, 212, 140, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(45, 212, 140, 0.4);
}

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

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary);
    color: var(--primary);
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-line {
    width: 2px;
    height: 40px;
    background: var(--border-color);
    border-radius: 2px;
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 50%;
    background: var(--primary);
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { top: -50%; }
    100% { top: 150%; }
}

/* ========================================
   ANIMATIONS
   ======================================== */
.animate-fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

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

/* ========================================
   SECTION STYLES
   ======================================== */
.section {
    padding: var(--section-padding) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 18px;
    border-radius: 50px;
    background: rgba(45, 212, 140, 0.1);
    border: 1px solid rgba(45, 212, 140, 0.15);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   LOGO IMAGE
   ======================================== */
.logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    border-radius: 6px;
    filter: drop-shadow(0 0 8px rgba(45, 212, 140, 0.2));
    transition: var(--transition-fast);
}

.nav-logo:hover .logo-img {
    filter: drop-shadow(0 0 12px rgba(45, 212, 140, 0.4));
    transform: scale(1.05);
}

.footer-logo-img {
    width: 44px;
    height: 44px;
    object-fit: contain;
    border-radius: 6px;
    filter: drop-shadow(0 0 6px rgba(45, 212, 140, 0.15));
}

/* ========================================
   VIDEO SECTION
   ======================================== */
.video-section {
    background: var(--bg-secondary);
}

.video-wrapper {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 32px;
    align-items: start;
    opacity: 0;
    transform: translateY(30px);
}

.video-wrapper.visible {
    opacity: 1;
    transform: translateY(0);
}

.video-container {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: #000;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.video-glow {
    position: absolute;
    inset: -2px;
    border-radius: var(--radius-xl);
    background: var(--gradient-1);
    opacity: 0;
    z-index: -1;
    transition: var(--transition-medium);
    filter: blur(20px);
}

.video-container:hover .video-glow {
    opacity: 0.3;
}

.video-container video {
    width: 100%;
    display: block;
    border-radius: var(--radius-xl);
    background: #000;
    aspect-ratio: 16 / 9;
    object-fit: contain;
}

/* Custom video poster styling */
.video-container video[poster] {
    object-fit: cover;
    object-position: center;
}

.video-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.video-info-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition-medium);
}

.video-info-item:hover {
    border-color: var(--border-glow);
    background: var(--bg-card-hover);
    transform: translateX(-4px);
}

.video-info-icon {
    width: 42px;
    height: 42px;
    min-width: 42px;
    border-radius: var(--radius-sm);
    background: rgba(45, 212, 140, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-info-icon svg {
    width: 20px;
    height: 20px;
}

.video-info-item h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.video-info-item p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ========================================
   CHALLENGE SECTION
   ======================================== */
.challenge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.challenge-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition-medium);
    opacity: 0;
    transform: translateY(30px);
}

.challenge-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.challenge-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(148, 163, 184, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.card-icon svg {
    width: 24px;
    height: 24px;
}

.card-icon.danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.card-icon.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.challenge-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.challenge-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========================================
   SOLUTION SECTION
   ======================================== */
.solution-section {
    background: var(--bg-secondary);
}

.solution-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 800px;
    margin: 0 auto;
}

.feature-card {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 28px 32px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateX(30px);
}

.feature-card.visible {
    opacity: 1;
    transform: translateX(0);
}

.feature-card:nth-child(even) {
    transform: translateX(-30px);
}

.feature-card:nth-child(even).visible {
    transform: translateX(0);
}

.feature-card:hover {
    border-color: var(--border-glow);
    box-shadow: var(--shadow-glow);
}

.feature-glow {
    position: absolute;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: var(--primary);
    filter: blur(80px);
    opacity: 0;
    transition: var(--transition-slow);
    top: 50%;
    right: -50px;
    transform: translateY(-50%);
}

.feature-card:hover .feature-glow {
    opacity: 0.06;
}

.feature-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary);
    opacity: 0.3;
    line-height: 1;
    min-width: 60px;
}

.feature-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.feature-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ========================================
   LAYERS SECTION
   ======================================== */
.layers-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

.layer-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition-medium);
    position: relative;
    opacity: 0;
    transform: translateY(30px);
}

.layer-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.layer-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.layer-card.featured {
    border-color: rgba(45, 212, 140, 0.3);
    box-shadow: var(--shadow-glow);
}

.layer-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 4px 14px;
    border-radius: 50px;
    background: var(--gradient-1);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    z-index: 2;
}

.layer-header {
    padding: 32px 24px;
    text-align: center;
    position: relative;
}

.layer-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 24px;
    right: 24px;
    height: 1px;
    background: var(--border-color);
}

.layer-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.layer-icon svg {
    width: 28px;
    height: 28px;
}

.layer-header.public .layer-icon {
    background: rgba(56, 189, 248, 0.1);
    color: #38bdf8;
}

.layer-header.student .layer-icon {
    background: rgba(45, 212, 140, 0.1);
    color: var(--primary);
}

.layer-header.dashboard .layer-icon {
    background: rgba(129, 140, 248, 0.1);
    color: #818cf8;
}

.layer-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.layer-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    direction: ltr;
}

.layer-body {
    padding: 24px;
}

.layer-features li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.layer-features li:last-child {
    border-bottom: none;
}

.layer-features li::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
}

/* Scoping Section */
.scoping-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 48px;
    opacity: 0;
    transform: translateY(30px);
}

.scoping-section.visible {
    opacity: 1;
    transform: translateY(0);
}

.scoping-header {
    text-align: center;
    margin-bottom: 40px;
}

.scoping-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.scoping-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.scoping-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.scoping-card {
    padding: 24px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition-medium);
}

.scoping-card:hover {
    border-color: var(--border-glow);
    background: rgba(45, 212, 140, 0.03);
}

.scoping-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: rgba(45, 212, 140, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.scoping-icon svg {
    width: 22px;
    height: 22px;
}

.scoping-card h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.scoping-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}
/* ========================================
   COURSES SECTION
   ======================================== */
.courses-section {
    background: var(--bg-primary);
}

.course-showcase {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.course-demo-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
}

.course-demo-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.course-demo-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px 28px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
}

.course-demo-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: var(--radius-md);
    background: var(--gradient-1);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.course-demo-icon svg {
    width: 24px;
    height: 24px;
}

.course-demo-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
}

.course-demo-header p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* Course Tabs */
.course-tabs {
    display: flex;
    gap: 4px;
    padding: 12px 28px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.15);
    overflow-x: auto;
}

.course-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition-fast);
}

.course-tab svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.course-tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.course-tab.active {
    color: var(--primary);
    background: rgba(45, 212, 140, 0.1);
    border-color: rgba(45, 212, 140, 0.2);
}

/* Course Panels */
.course-tab-panels {
    padding: 32px 28px;
    min-height: 220px;
}

.course-panel {
    display: none;
    animation: panelFadeIn 0.35s ease;
}

.course-panel.active {
    display: block;
}

@keyframes panelFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.panel-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
}

.panel-icon-large {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: rgba(45, 212, 140, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.panel-icon-large svg {
    width: 28px;
    height: 28px;
}

.panel-content h4 {
    font-size: 1.2rem;
    font-weight: 700;
}

.panel-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
}

.panel-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 10px 16px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.panel-list li:hover {
    background: rgba(45, 212, 140, 0.04);
    border-color: rgba(45, 212, 140, 0.15);
    color: var(--text-primary);
}

.panel-list li::before {
    content: '';
    width: 8px;
    height: 8px;
    min-width: 8px;
    border-radius: 50%;
    background: var(--primary);
    opacity: 0.6;
}

/* Course Features Grid */
.course-features-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.course-feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    text-align: center;
    transition: var(--transition-medium);
    opacity: 0;
    transform: translateY(20px);
    position: relative;
    overflow: hidden;
}

.course-feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.course-feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-1);
    opacity: 0;
    transition: var(--transition-medium);
}

.course-feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(148, 163, 184, 0.2);
    box-shadow: var(--shadow-lg);
}

.course-feature-card:hover::before {
    opacity: 1;
}

.cf-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    transition: var(--transition-medium);
}

.cf-icon svg {
    width: 26px;
    height: 26px;
}

.cf-icon.exams {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
}

.cf-icon.books {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}

.cf-icon.reports {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
}

.cf-icon.homework {
    background: rgba(139, 92, 246, 0.1);
    color: #8b5cf6;
}

.cf-icon.labs {
    background: rgba(20, 184, 166, 0.1);
    color: #14b8a6;
}

.course-feature-card:hover .cf-icon {
    transform: scale(1.1);
}

.course-feature-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.course-feature-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 14px;
}

.cf-stat {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    font-size: 0.78rem;
    color: var(--text-muted);
}

.cf-stat-icon {
    font-size: 0.9rem;
}

/* ========================================
   ROLES SECTION
   ======================================== */
.roles-section {
    background: var(--bg-secondary);
}

.roles-timeline {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
}

.timeline-line {
    position: absolute;
    right: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, transparent, var(--primary), transparent);
    transform: translateX(50%);
}

.role-item {
    display: flex;
    align-items: center;
    margin-bottom: 32px;
    position: relative;
    opacity: 0;
    transform: translateX(30px);
}

.role-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.role-item:nth-child(odd) {
    flex-direction: row-reverse;
    transform: translateX(-30px);
}

.role-item:nth-child(odd).visible {
    transform: translateX(0);
}

.role-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 3px solid var(--bg-secondary);
    position: absolute;
    right: calc(50% - 8px);
    z-index: 2;
    box-shadow: 0 0 0 3px var(--primary);
}

.role-dot.super { background: #ef4444; box-shadow: 0 0 0 3px #ef4444; }
.role-dot.dean { background: #f59e0b; box-shadow: 0 0 0 3px #f59e0b; }
.role-dot.faculty { background: #22c55e; box-shadow: 0 0 0 3px #22c55e; }
.role-dot.head { background: #3b82f6; box-shadow: 0 0 0 3px #3b82f6; }
.role-dot.staff { background: #8b5cf6; box-shadow: 0 0 0 3px #8b5cf6; }
.role-dot.employee { background: #ec4899; box-shadow: 0 0 0 3px #ec4899; }

.role-card {
    width: calc(50% - 40px);
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition-medium);
}

.role-card:hover {
    border-color: rgba(148, 163, 184, 0.2);
    box-shadow: var(--shadow-md);
}

.role-level {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 4px;
    font-weight: 500;
}

.role-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.role-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.role-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.role-badge.super { background: rgba(239, 68, 68, 0.1); color: #ef4444; }
.role-badge.dean { background: rgba(245, 158, 11, 0.1); color: #f59e0b; }
.role-badge.faculty { background: rgba(34, 197, 94, 0.1); color: #22c55e; }
.role-badge.head { background: rgba(59, 130, 246, 0.1); color: #3b82f6; }
.role-badge.staff { background: rgba(139, 92, 246, 0.1); color: #8b5cf6; }
.role-badge.employee { background: rgba(236, 72, 153, 0.1); color: #ec4899; }

/* ========================================
   TECH SECTION
   ======================================== */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.tech-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    transition: var(--transition-medium);
    opacity: 0;
    transform: scale(0.9);
}

.tech-card.visible {
    opacity: 1;
    transform: scale(1);
}

.tech-card:hover {
    transform: translateY(-6px) scale(1);
    border-color: rgba(148, 163, 184, 0.2);
    box-shadow: var(--shadow-lg);
}

.tech-logo {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.tech-logo svg {
    width: 32px;
    height: 32px;
}

.tech-logo.laravel {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.tech-logo.nextjs {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

.tech-logo.spatie {
    background: rgba(45, 212, 140, 0.1);
    color: var(--primary);
}

.tech-logo.paymob {
    background: rgba(56, 189, 248, 0.1);
    color: #38bdf8;
}

.tech-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 4px;
    font-family: 'Inter', 'Cairo', sans-serif;
}

.tech-card p {
    font-size: 0.85rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 10px;
}

.tech-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   MIND MAP SECTION
   ======================================== */
.mindmap-section {
    background: var(--bg-secondary);
    overflow: hidden;
}

.mindmap-wrapper {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
}

.mindmap-wrapper.visible {
    opacity: 1;
    transform: translateY(0);
}

.mindmap-controls {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 10;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mm-ctrl {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.mm-ctrl:hover {
    background: var(--bg-card-hover);
    color: var(--primary);
    border-color: var(--border-glow);
}

.mm-ctrl svg {
    width: 18px;
    height: 18px;
}

.mindmap-canvas {
    width: 100%;
    height: 700px;
    position: relative;
    overflow: hidden;
    cursor: grab;
}

.mindmap-canvas:active {
    cursor: grabbing;
}

.mindmap-svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.mindmap-nodes {
    position: absolute;
    inset: 0;
    transform-origin: center center;
}

.mm-node {
    position: absolute;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    cursor: pointer;
    transition: var(--transition-fast);
    transform: translate(-50%, -50%);
    z-index: 2;
    text-align: center;
}

.mm-node:hover {
    z-index: 10;
    transform: translate(-50%, -50%) scale(1.08);
}

.mm-node.root {
    font-size: 1rem;
    font-weight: 800;
    padding: 16px 28px;
    background: var(--gradient-1);
    color: #fff;
    border-radius: var(--radius-lg);
    box-shadow: 0 0 40px rgba(45, 212, 140, 0.3);
}

.mm-node.branch {
    background: var(--bg-tertiary);
    border: 2px solid;
    font-size: 0.9rem;
}

.mm-node.branch.challenge { border-color: #ef4444; color: #fca5a5; }
.mm-node.branch.solution { border-color: #22c55e; color: #86efac; }
.mm-node.branch.layers { border-color: #3b82f6; color: #93c5fd; }
.mm-node.branch.architecture { border-color: #8b5cf6; color: #c4b5fd; }
.mm-node.branch.roles { border-color: #f59e0b; color: #fcd34d; }
.mm-node.branch.tech { border-color: #ec4899; color: #f9a8d4; }
.mm-node.branch.courses { border-color: #06b6d4; color: #67e8f9; }

.mm-node.leaf {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    font-weight: 500;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.mm-node.leaf:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.footer-brand h3 {
    font-size: 1rem;
    font-weight: 700;
}

.footer-brand p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

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

.footer-meta p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-year {
    margin-top: 4px;
    font-weight: 600;
    color: var(--text-secondary) !important;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 14, 23, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .stat-divider {
        width: 40px;
        height: 1px;
    }

    .layers-container {
        grid-template-columns: 1fr;
    }

    .roles-timeline {
        padding-right: 30px;
    }

    .timeline-line {
        right: 0;
        transform: none;
    }

    .role-item,
    .role-item:nth-child(odd) {
        flex-direction: row;
        justify-content: flex-start;
    }

    .role-dot {
        right: -8px;
        left: auto;
    }

    .role-card {
        width: 100%;
    }

    .scoping-section {
        padding: 32px 20px;
    }

    .feature-card {
        flex-direction: column;
        text-align: center;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

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

    .mindmap-canvas {
        height: 500px;
    }

    .video-wrapper {
        grid-template-columns: 1fr;
    }

    .video-info {
        flex-direction: row;
        overflow-x: auto;
        gap: 12px;
        padding-bottom: 8px;
    }

    .video-info-item {
        min-width: 220px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .challenge-grid {
        grid-template-columns: 1fr;
    }

    .tech-grid {
        grid-template-columns: 1fr;
    }

    .course-features-grid {
        grid-template-columns: 1fr;
    }

    .course-tabs {
        gap: 4px;
        padding: 10px 16px;
    }

    .course-tab {
        padding: 8px 14px;
        font-size: 0.8rem;
    }

    .course-tab-panels {
        padding: 24px 16px;
    }

    .course-demo-header {
        padding: 16px;
    }
}

@media (min-width: 481px) and (max-width: 768px) {
    .course-features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}