:root {
    --primary: #005f73;
    --primary-dark: #004654;
    --primary-light: #006d77;
    --secondary: #006d77;
    --secondary-light: #00838f;
    --accent: #e67e22;
    --bg: #f8faf9;
    --bg-card: #ffffff;
    --text: #1a2a1f;
    --text-light: #5a6b5f;
    --text-lighter: #8a9b8f;
    --border: #dce5e0;
    --shadow: 0 4px 24px rgba(26, 107, 76, 0.08);
    --shadow-hover: 0 8px 40px rgba(26, 107, 76, 0.15);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --success: #27ae60;
    --danger: #e74c3c;
    --warning: #f39c12;
}

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

html { scroll-behavior: smooth; }

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

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

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0 20px;
    height: 72px;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.navbar .container {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--primary);
    font-size: 22px;
    font-weight: 800;
}

.logo i {
    font-size: 28px;
    color: var(--secondary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-weight: 500;
    font-size: 15px;
}

.nav-links a:hover,
.nav-links a.active {
    background: var(--primary);
    color: white;
}

.auth-buttons { display: flex; gap: 10px; }

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text);
    cursor: pointer;
}

.mobile-dropdown { display: none; }

.user-menu {
    display: flex;
    align-items: center;
    gap: 15px;
    font-weight: 600;
    color: var(--primary);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-family: 'Cairo', sans-serif;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(26, 107, 76, 0.3);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.btn-lg { padding: 16px 36px; font-size: 17px; }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-block { width: 100%; }

.btn-social {
    width: 100%;
    padding: 14px;
    border: 1px solid var(--border);
    background: white;
}

.btn-social:hover {
    background: #f5f5f5;
}

/* ===== Spinner ===== */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.hidden { display: none !important; }

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

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 100px 0 60px;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 30%, var(--primary-light) 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(0, 109, 119, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    max-width: 800px;
    margin: 0 auto;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.3;
}

.hero-content .highlight {
    color: var(--secondary);
    position: relative;
}

.hero-content p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 35px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 50px;
}

.hero-buttons .btn-outline {
    color: white;
    border-color: rgba(255,255,255,0.5);
}

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

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
}

.stat { text-align: center; }

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 800;
    color: var(--secondary);
}

.stat-label {
    font-size: 14px;
    opacity: 0.8;
}

/* ===== Sections ===== */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary-dark);
    margin-bottom: 12px;
}

.section-header p {
    font-size: 17px;
    color: var(--text-light);
}

section { padding: 80px 0; }

/* ===== Grades ===== */
.grades-section { background: white; }

.grades-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.grade-card {
    background: var(--bg);
    border-radius: var(--radius);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    text-decoration: none;
    display: block;
    color: var(--text);
}

.grade-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
}

.grade-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 30px;
    color: white;
}

.grade-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.grade-card p {
    font-size: 14px;
    color: var(--text-light);
}

.grade-card .grade-lessons {
    margin-top: 12px;
    font-size: 13px;
    color: var(--primary);
    font-weight: 600;
}

/* ===== Features ===== */
.features-section { background: var(--bg); }

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 28px;
}

.feature-card {
    background: white;
    border-radius: var(--radius);
    padding: 35px 30px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
    font-size: 26px;
    color: white;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
}

/* ===== Teacher ===== */
.teacher-section { background: white; }

.teacher-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: center;
}

.teacher-placeholder {
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 100px;
    color: rgba(255,255,255,0.3);
    position: relative;
    overflow: hidden;
}

.teacher-placeholder::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 30%, rgba(0, 109, 119, 0.2), transparent);
}

.teacher-info h2 {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary-dark);
    margin-bottom: 8px;
}

.teacher-title {
    font-size: 16px;
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: 16px;
}

.teacher-info p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.9;
    margin-bottom: 24px;
}

.teacher-achievements {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.achievement {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
}

.achievement i {
    color: var(--secondary);
    font-size: 18px;
}

/* ===== Contact ===== */
.contact-section { background: var(--bg); }

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    background: white;
    padding: 18px 24px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
}

.contact-item:hover {
    transform: translateX(-6px);
    box-shadow: var(--shadow);
}

.contact-item i {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

.contact-form {
    background: white;
    padding: 35px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: 'Cairo', sans-serif;
    font-size: 15px;
    transition: var(--transition);
    background: var(--bg);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 107, 76, 0.1);
}

/* ===== Footer ===== */
.footer {
    background: var(--primary-dark);
    color: white;
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 50px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-section h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--secondary);
}

.footer-section p {
    font-size: 14px;
    opacity: 0.8;
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-section a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-section a:hover { color: var(--secondary); }

.footer-bottom {
    text-align: center;
    padding: 24px 0;
    font-size: 14px;
    opacity: 0.6;
}

/* ===== Auth Pages ===== */
.auth-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 20px 40px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
}

.auth-container {
    width: 100%;
    max-width: 480px;
}

.auth-card {
    background: white;
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow-hover);
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-header i {
    font-size: 48px;
    color: var(--primary);
    margin-bottom: 12px;
}

.auth-header h2 {
    font-size: 26px;
    font-weight: 800;
    color: var(--primary-dark);
}

.auth-header p {
    font-size: 14px;
    color: var(--text-light);
}

/* ===== Form ===== */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 6px;
    color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: 'Cairo', sans-serif;
    font-size: 15px;
    transition: var(--transition);
    background: var(--bg);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 107, 76, 0.1);
}

.form-group small {
    display: block;
    font-size: 12px;
    color: var(--text-lighter);
    margin-top: 4px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    margin-bottom: 20px;
}

.form-options a {
    color: var(--primary);
    text-decoration: none;
}

.terms-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 400;
}

.terms-group label a { color: var(--primary); }

.auth-divider {
    text-align: center;
    margin: 24px 0;
    position: relative;
}

.auth-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border);
}

.auth-divider span {
    background: white;
    padding: 0 16px;
    position: relative;
    color: var(--text-light);
    font-size: 14px;
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

/* ===== Page Header ===== */
.page-header {
    padding: 120px 0 50px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    text-align: center;
    color: white;
}

.page-header h1 {
    font-size: 38px;
    font-weight: 800;
    margin-bottom: 8px;
}

.page-header p {
    font-size: 17px;
    opacity: 0.8;
}

/* ===== Courses ===== */
.courses-section { background: white; }

.courses-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    border-radius: 50px;
    border: 1px solid var(--border);
    background: white;
    font-family: 'Cairo', sans-serif;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.course-card {
    background: var(--bg);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border);
    text-decoration: none;
    display: block;
    color: var(--text);
}

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

.course-thumbnail {
    height: 180px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.course-thumbnail i {
    font-size: 48px;
    color: rgba(255,255,255,0.3);
}

.course-thumbnail .play-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    position: absolute;
}

.course-thumbnail .play-btn i {
    font-size: 22px;
    color: white;
}

.course-body {
    padding: 20px;
}

.course-body h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}

.course-body p {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-lighter);
}

.course-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ===== Payment Plans ===== */
.payment-plans { background: var(--bg); }

.plans-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    max-width: 1000px;
    margin: 0 auto;
}

.plan-card {
    background: white;
    border-radius: var(--radius);
    padding: 35px 28px;
    text-align: center;
    border: 2px solid var(--border);
    transition: var(--transition);
    position: relative;
}

.plan-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }

.plan-card.featured {
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(212, 168, 67, 0.1);
}

.plan-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--secondary);
    color: var(--text);
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 700;
}

.plan-header h3 {
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 16px;
}

.plan-price { margin-bottom: 24px; }

.plan-price .price {
    font-size: 42px;
    font-weight: 800;
    color: var(--primary);
}

.plan-price .currency {
    display: block;
    font-size: 14px;
    color: var(--text-light);
}

.plan-features {
    list-style: none;
    text-align: right;
    margin-bottom: 28px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.plan-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

.plan-features .fa-check { color: var(--success); }
.plan-features .fa-times { color: var(--danger); }

/* ===== Video Page ===== */
.video-section {
    padding: 100px 0 60px;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #0a0a0a 100%);
    min-height: 100vh;
}

.video-layout {
    max-width: 960px;
    margin: 0 auto;
}

.video-player {
    background: #000;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 40px rgba(0,0,0,0.6), 0 0 80px rgba(39,174,96,0.08);
    position: relative;
}

.video-player::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    padding: 2px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light), var(--primary));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    z-index: 1;
}

.video-player #youtubePlayer {
    width: 100%;
    aspect-ratio: 16/9;
    display: block;
    border-radius: 16px;
    position: relative;
    overflow: hidden;
}

.video-player #ytplayer {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 16px;
}

.video-player-overlay {
    border-radius: 16px;
}

.video-player-overlay {
    border-radius: 16px;
}

.video-info {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    padding: 28px 32px;
    border-radius: 16px;
    color: white;
    margin-top: 24px;
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.video-info h2 {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #fff 60%, #27ae60);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.video-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: #888;
    margin-bottom: 16px;
}

.video-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 14px;
    background: rgba(255,255,255,0.05);
    border-radius: 20px;
    font-size: 13px;
}

.video-info p {
    font-size: 15px;
    color: #bbb;
    margin-bottom: 0;
    line-height: 1.8;
    padding: 20px 0 0;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.video-actions {
    display: flex;
    gap: 12px;
}

.video-actions .btn-primary { background: var(--primary); border-color: var(--primary); }

.video-sidebar {
    background: #1a1a1a;
    border-radius: var(--radius);
    padding: 24px;
    color: white;
}

.video-sidebar h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid #333;
}

/* ===== Payment Page ===== */
.payment-section {
    min-height: 100vh;
    padding: 100px 0 40px;
    background: var(--bg);
}

.payment-container {
    max-width: 560px;
    margin: 0 auto;
}

.payment-card {
    background: white;
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
}

.payment-header {
    text-align: center;
    margin-bottom: 30px;
}

.payment-header i {
    font-size: 48px;
    color: var(--primary);
}

.payment-header h2 {
    font-size: 24px;
    font-weight: 800;
    margin-top: 8px;
}

.payment-summary {
    background: var(--bg);
    padding: 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 30px;
}

.payment-summary h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 16px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 15px;
}

.summary-row:last-child {
    border-top: 1px solid var(--border);
    margin-top: 8px;
    padding-top: 12px;
    font-weight: 700;
    font-size: 18px;
    color: var(--primary);
}

.payment-form { margin-bottom: 20px; }

.payment-methods {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.payment-method {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.payment-method:hover { border-color: var(--primary); }

.payment-method input:checked + i + span,
.payment-method input:checked ~ span { color: var(--primary); }

.payment-method input:checked ~ i { color: var(--primary); }

.payment-method input:checked {
    border-color: var(--primary);
}

.payment-method input { display: none; }

.payment-method:has(input:checked) {
    border-color: var(--primary);
    background: rgba(26, 107, 76, 0.03);
}

.payment-method i {
    font-size: 24px;
    color: var(--text-light);
}

.payment-method span {
    font-size: 13px;
    font-weight: 600;
}

#cardDetails { margin-top: 20px; }

.payment-footer {
    text-align: center;
    font-size: 13px;
    color: var(--text-lighter);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* ===== Notification ===== */
.notification {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text);
    color: white;
    padding: 16px 32px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    z-index: 9999;
    opacity: 0;
    transition: var(--transition);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    max-width: 90vw;
    text-align: center;
}

.notification.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.notification.success { background: var(--success); }
.notification.error { background: var(--danger); }
.notification.warning { background: var(--warning); color: var(--text); }

/* ===== Admin ===== */
.admin-body { padding-top: 0; }

.admin-layout {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 260px;
    background: var(--primary-dark);
    color: white;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h2 {
    font-size: 20px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-nav {
    flex: 1;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
}

.sidebar-nav .nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.sidebar-nav .nav-item:hover,
.sidebar-nav .nav-item.active {
    background: rgba(255,255,255,0.1);
    color: white;
}

.sidebar-toggle { display: none; }

.admin-main {
    flex: 1;
    margin-right: 260px;
    padding: 24px 32px;
    min-height: 100vh;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.admin-header h1 {
    font-size: 22px;
    font-weight: 700;
}

.menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text);
}

.admin-content { }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ===== Stats ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 18px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

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

.stat-card i {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: white;
}

.stat-value {
    display: block;
    font-size: 28px;
    font-weight: 800;
    color: var(--primary-dark);
}

.stat-label {
    font-size: 13px;
    color: var(--text-light);
}

/* ===== Admin Card ===== */
.admin-card {
    background: white;
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--border);
    margin-bottom: 24px;
}

.admin-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.card-header h3 { margin-bottom: 0; }

/* ===== Tables ===== */
.table-responsive { overflow-x: auto; }

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.admin-table th {
    text-align: right;
    padding: 12px 16px;
    background: var(--bg);
    font-weight: 700;
    color: var(--text);
    white-space: nowrap;
    border-bottom: 2px solid var(--border);
}

.admin-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text-light);
}

.admin-table tr:hover td { background: var(--bg); }

.admin-table .badge {
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success { background: rgba(39,174,96,0.15); color: var(--success); }
.badge-warning { background: rgba(243,156,18,0.15); color: var(--warning); }
.badge-danger { background: rgba(231,76,60,0.15); color: var(--danger); }
.badge-info { background: rgba(52,152,219,0.15); color: #2980b9; }

.table-actions {
    display: flex;
    gap: 8px;
}

.table-actions button {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.table-actions .edit-btn { background: rgba(26,107,76,0.1); color: var(--primary); }
.table-actions .delete-btn { background: rgba(231,76,60,0.1); color: var(--danger); }
.table-actions .view-btn { background: rgba(212,168,67,0.15); color: var(--secondary); }
.table-actions .free-gift-btn { background: rgba(212,168,67,0.15); color: var(--secondary); }

.table-actions button:hover { transform: scale(1.1); }

/* ===== Admin Form ===== */
.admin-form { max-width: 600px; }

.admin-form .form-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

/* ===== Grades Manager ===== */
.grades-manager {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.grade-item {
    background: var(--bg);
    padding: 20px;
    border-radius: var(--radius-sm);
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.grade-item:hover { border-color: var(--primary); }

.grade-item h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 4px;
}

.grade-item .count {
    font-size: 13px;
    color: var(--text-light);
}

.toggle-switch input { display: none; }

.toggle-slider {
    width: 40px;
    height: 22px;
    background: #ccc;
    border-radius: 50px;
    position: relative;
    transition: var(--transition);
}

.toggle-slider::after {
    content: '';
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    position: absolute;
    top: 2px;
    right: 2px;
    transition: var(--transition);
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--primary);
}

.toggle-switch input:checked + .toggle-slider::after {
    right: 20px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .video-player {
        border-radius: 12px;
    }
    .video-player::before {
        border-radius: 12px;
    }
    .plans-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 0 16px;
    }
    .nav-links, .auth-buttons, .user-menu {
        display: none !important;
    }
    .mobile-dropdown {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        background: white;
        padding: 24px 20px 40px;
        box-shadow: var(--shadow);
        z-index: 999;
        flex-direction: column;
        gap: 16px;
        overflow-y: auto;
    }
    .mobile-dropdown.show {
        display: flex;
    }
    .mobile-nav-link {
        padding: 16px 24px !important;
        border-radius: 14px !important;
        color: var(--text) !important;
        text-decoration: none !important;
        font-weight: 700 !important;
        font-size: 18px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 10px !important;
        min-height: 60px !important;
        background: var(--bg) !important;
        border: 1px solid var(--border) !important;
        transition: 0.2s !important;
    }
    .mobile-nav-link:hover,
    .mobile-nav-link.active {
        background: var(--primary) !important;
        color: white !important;
        border-color: var(--primary) !important;
    }
    .mobile-toggle {
        display: block;
    }
    .hero-content h1 {
        font-size: 32px;
    }
    .hero-stats {
        gap: 30px;
        flex-wrap: wrap;
    }
    .teacher-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .teacher-placeholder {
        max-width: 280px;
        margin: 0 auto;
    }
    .contact-content {
        grid-template-columns: 1fr;
    }
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .plans-grid {
        grid-template-columns: 1fr;
    }
    .payment-methods {
        grid-template-columns: 1fr;
    }
    .admin-sidebar {
        right: -280px;
    }
    .admin-sidebar.show {
        right: 0;
    }
    .admin-main {
        margin-right: 0;
        padding: 16px;
    }
    .menu-btn { display: block; }
    .sidebar-toggle {
        display: block;
        position: absolute;
        top: 16px;
        left: 16px;
        background: none;
        border: none;
        color: white;
        font-size: 24px;
        cursor: pointer;
    }
    .admin-header h1 {
        font-size: 18px;
    }
    .page-header h1 {
        font-size: 28px;
    }
    .page-header {
        padding: 100px 0 30px;
    }
    .section-header h2 {
        font-size: 26px;
    }
    .courses-filter {
        gap: 8px;
        margin-bottom: 24px;
    }
    .filter-btn {
        padding: 8px 16px;
        font-size: 13px;
    }
}

/* ===== Touch-friendly improvements للجوال ===== */
@media (max-width: 768px) {
    .btn, .filter-btn, .nav-links a, .auth-buttons .btn, .grade-card, .plan-card .btn {
        min-height: 48px;
        font-size: 16px;
    }
    .btn-sm { min-height: 44px; font-size: 14px; padding: 12px 20px; }
    .nav-links a { padding: 14px 24px; min-height: 48px; }
    .form-group input, .form-group select, .form-group textarea {
        min-height: 50px;
        font-size: 16px;
    }
    .filter-btn { padding: 12px 20px; }
    .table-actions button { width: 44px; height: 44px; font-size: 18px; border-radius: 12px; }
    .courses-grid { gap: 16px; }
}

@media (max-width: 480px) {
    .container { padding: 0 12px; }
    .hero-content h1 { font-size: 24px; }
    .hero-content p { font-size: 14px; }
    .hero-buttons { flex-direction: column; gap: 10px; }
    .hero-buttons .btn { width: 100%; text-align: center; justify-content: center; }
    .hero { padding: 80px 0 40px; }
    .feature-card { padding: 20px; }
    .grade-card { padding: 20px; }
    .section-header h2 { font-size: 22px; }
    .section-header p { font-size: 14px; }
    .btn { padding: 14px 24px; font-size: 16px; min-height: 48px; }
    .btn-sm { min-height: 44px; padding: 12px 20px; font-size: 15px; }
    .footer { padding: 40px 0 70px; }
    .stat-number { font-size: 28px; }
    .admin-main { padding: 12px; }
    .modal-content { padding: 20px; width: 95%; }
    .auth-container { padding: 0 12px; }
    .auth-card { padding: 24px 16px; margin: 0; }
    .auth-card h2 { font-size: 20px; }
    .auth-card .logo-text { font-size: 18px; }
    .admin-stats { grid-template-columns: 1fr 1fr; gap: 10px; }
    .admin-table { font-size: 12px; }
    .admin-table th, .admin-table td { padding: 6px 4px; }
    .admin-table { display: block; overflow-x: auto; }
    .grades-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
    .courses-grid { grid-template-columns: 1fr; gap: 12px; }
    .video-container { border-radius: 8px; }
    .chat-container { flex-direction: column; }
    .exam-question { padding: 14px; }
    .exam-question h3 { font-size: 15px; }
    .plans-grid { gap: 12px; }
    .plan-card { padding: 20px; }
    .plan-card .btn { min-height: 48px; font-size: 16px; }
    .form-group input, .form-group select, .form-group textarea { min-height: 50px; padding: 12px 14px; font-size: 16px; }
    .teacher-placeholder { max-width: 200px; }
    .teacher-info h2 { font-size: 22px; }
    .features-grid { grid-template-columns: 1fr; gap: 12px; }
    .filter-btn { min-height: 48px; padding: 12px 20px; }
    .table-actions button { width: 44px; height: 44px; font-size: 18px; border-radius: 12px; }
}