/* Great Cadet Tutor - Modern Design System */
:root {
    --primary: #1a365d;
    --primary-light: #2c5282;
    --primary-dark: #0f2440;
    --accent: #d4a853;
    --accent-light: #e8c97a;
    --accent-dark: #b8922f;
    --success: #38a169;
    --error: #e53e3e;
    --warning: #dd6b20;
    --gray-50: #f7fafc;
    --gray-100: #edf2f7;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e0;
    --gray-400: #a0aec0;
    --gray-500: #718096;
    --gray-600: #4a5568;
    --gray-700: #2d3748;
    --gray-800: #1a202c;
    --gray-900: #171923;
    --white: #ffffff;
    --font-sans: 'IBM Plex Sans Thai', -apple-system, sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -1px rgba(0,0,0,.06);
    --shadow-md: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -2px rgba(0,0,0,.05);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,.1), 0 10px 10px -5px rgba(0,0,0,.04);
    --shadow-xl: 0 25px 50px -12px rgba(0,0,0,.25);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    color: var(--gray-700);
    line-height: 1.7;
    background: var(--white);
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 800px; }

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    color: var(--gray-900);
    line-height: 1.3;
    font-weight: 700;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 50px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.95rem;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: var(--primary-dark);
    box-shadow: 0 4px 14px rgba(212, 168, 83, 0.4);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(212, 168, 83, 0.5);
}

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

.btn-white {
    background: var(--white);
    color: var(--primary);
}
.btn-white:hover { background: var(--gray-100); }

.btn-outline-white {
    border-color: rgba(255,255,255,.5);
    color: var(--white);
    background: transparent;
}
.btn-outline-white:hover {
    background: rgba(255,255,255,.1);
    border-color: var(--white);
}

.btn-sm { padding: 8px 18px; font-size: 0.875rem; }
.btn-lg { padding: 16px 32px; font-size: 1.05rem; }
.btn-block { width: 100%; }

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 12px 0;
    transition: var(--transition);
    background: #fff;
    box-shadow: 0 1px 0 rgba(15, 23, 42, .08), 0 4px 16px rgba(15, 23, 42, .06);
}

.navbar.scrolled {
    background: #fff;
    box-shadow: var(--shadow);
    padding: 10px 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
}

.logo-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--accent);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--gray-900);
}

.logo-img {
    height: 44px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    display: block;
}

.footer .logo-img { height: 40px; }

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

.nav-menu a {
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--gray-600);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    transition: var(--transition);
}

/* Hero */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
    overflow: hidden;
    padding: 120px 0 80px;
}

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

.hero-shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    background: var(--accent);
}
.hero-shape-1 { width: 600px; height: 600px; top: -200px; right: -100px; }
.hero-shape-2 { width: 400px; height: 400px; bottom: -100px; left: -100px; }
.hero-shape-3 { width: 200px; height: 200px; top: 50%; left: 30%; }

.hero-content {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    background: rgba(212, 168, 83, 0.2);
    color: var(--accent-light);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 20px;
    border: 1px solid rgba(212, 168, 83, 0.3);
}

.hero-text h1 {
    color: var(--white);
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--accent-light);
    font-weight: 500;
    margin-bottom: 12px;
}

.hero-desc {
    color: rgba(255,255,255,.8);
    font-size: 1.05rem;
    margin-bottom: 32px;
    max-width: 520px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(255,255,255,.7);
}

.hero-visual {
    position: relative;
    height: 400px;
}

.hero-card {
    position: absolute;
    background: rgba(255,255,255,.95);
    backdrop-filter: blur(10px);
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 260px;
    animation: float 6s ease-in-out infinite;
}

.hero-card-1 { top: 0; right: 0; animation-delay: 0s; }
.hero-card-2 { top: 50%; left: 0; transform: translateY(-50%); animation-delay: 2s; }
.hero-card-3 { bottom: 0; right: 20%; animation-delay: 4s; }

.card-icon { font-size: 2rem; margin-bottom: 12px; }
.hero-card h4 { font-size: 1rem; margin-bottom: 8px; font-family: var(--font-sans); }
.hero-card p { font-size: 0.875rem; color: var(--gray-500); }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.hero-card-2 { animation-name: float2; }
@keyframes float2 {
    0%, 100% { transform: translateY(-50%); }
    50% { transform: translateY(calc(-50% - 10px)); }
}

/* Sections */
.section { padding: 100px 0; }
.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 60px;
}
.section-header h2 {
    margin-top: 8px;
    background: linear-gradient(135deg, var(--gray-900), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.section-tag {
    display: inline-block;
    color: var(--accent-dark);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
}
.section-desc {
    color: var(--gray-500);
    max-width: 600px;
    margin: 16px auto 0;
}
.section-cta { text-align: center; margin-top: 48px; }

/* Features */
.features { background: var(--gray-50); }

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--white);
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--gray-100);
}
.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.feature-icon { font-size: 2.5rem; margin-bottom: 16px; }
.feature-card h3 { font-family: var(--font-sans); font-size: 1.1rem; margin-bottom: 8px; }
.feature-card p { font-size: 0.9rem; color: var(--gray-500); }

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--gray-100);
    color: var(--gray-600);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}
.badge-level { background: rgba(26, 54, 93, 0.1); color: var(--primary); }

/* Portfolio */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.portfolio-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
}
.portfolio-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}
.portfolio-card.featured { border: 2px solid var(--accent); }

.featured-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--accent);
    color: var(--primary-dark);
    padding: 6px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    z-index: 1;
}

.portfolio-image {
    height: 200px;
    background-size: cover;
    background-position: center;
}
.portfolio-image-placeholder {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.portfolio-body { padding: 24px; }
.portfolio-body h3 { font-family: var(--font-sans); font-size: 1.1rem; margin: 8px 0; }
.student-name { color: var(--accent-dark); font-weight: 600; font-size: 0.9rem; margin-bottom: 8px; }
.portfolio-body p:last-child { font-size: 0.9rem; color: var(--gray-500); }

/* Courses */
.courses-preview { background: var(--gray-50); }

.courses-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.course-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.course-image {
    height: 180px;
    background-size: cover;
    background-position: center;
}
.course-image-placeholder {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.course-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.course-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.course-duration { font-size: 0.85rem; color: var(--gray-500); }
.course-body h3 { font-family: var(--font-sans); margin-bottom: 8px; }
.course-body > p { font-size: 0.9rem; color: var(--gray-500); flex: 1; }

.course-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--gray-100);
}

.course-price {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.course-card-full { flex-direction: row; }
.course-card-full .course-image { width: 280px; height: auto; min-height: 220px; flex-shrink: 0; }
.course-desc-full { margin: 12px 0 16px; }
.course-details {
    display: flex;
    gap: 24px;
    margin-bottom: 20px;
    padding: 16px;
    background: var(--gray-50);
    border-radius: var(--radius);
}
.detail-item strong { display: block; font-size: 0.75rem; color: var(--gray-500); margin-bottom: 4px; }

.courses-grid-full { grid-template-columns: 1fr; }

/* Knowledge */
.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.knowledge-card {
    background: var(--white);
    padding: 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-100);
    transition: var(--transition);
    display: block;
}
.knowledge-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.knowledge-card h3 { font-family: var(--font-sans); font-size: 1.1rem; margin: 12px 0 8px; }
.knowledge-card p { font-size: 0.9rem; color: var(--gray-500); margin-bottom: 16px; }
.read-more { color: var(--accent-dark); font-weight: 600; font-size: 0.9rem; }

.knowledge-card-full {
    display: flex;
    gap: 0;
    padding: 0;
    overflow: hidden;
}
.knowledge-image {
    width: 240px;
    min-height: 180px;
    background-size: cover;
    background-position: center;
    flex-shrink: 0;
}
.knowledge-body { padding: 24px; flex: 1; }
.knowledge-meta {
    display: flex;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--gray-400);
    margin: 8px 0 12px;
}
.knowledge-grid-full { grid-template-columns: 1fr; }

/* CTA */
.cta-section { padding: 80px 0; }

.cta-box {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    padding: 60px;
    border-radius: var(--radius-lg);
    text-align: center;
    color: var(--white);
}
.cta-box h2 { color: var(--white); margin-bottom: 12px; }
.cta-box p { opacity: 0.9; margin-bottom: 32px; font-size: 1.1rem; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-list { margin-top: 32px; }
.contact-list li {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}
.contact-icon { font-size: 1.5rem; }
.contact-list strong { display: block; color: var(--gray-900); margin-bottom: 4px; }

.map-placeholder {
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    height: 350px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 3rem;
}
.map-placeholder p { font-size: 1.1rem; font-weight: 600; margin-top: 12px; color: var(--gray-700); }
.map-placeholder small { color: var(--gray-500); margin-top: 4px; }

/* Page Hero */
.page-hero {
    position: relative;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 55%, var(--primary-light) 100%);
    padding: 140px 0 80px;
    text-align: center;
    color: var(--white);
    overflow: hidden;
}
.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(212,168,83,.15), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(255,255,255,.08), transparent 35%);
    pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { color: var(--white); margin: 12px 0; }
.page-hero p { color: rgba(255,255,255,.8); max-width: 600px; margin: 0 auto; }
.page-hero-sm { padding: 120px 0 60px; text-align: left; }
.page-hero-sm h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }

.back-link {
    display: inline-block;
    color: rgba(255,255,255,.7);
    margin-bottom: 16px;
    font-size: 0.9rem;
}
.back-link:hover { color: var(--accent-light); }

.article-meta { color: rgba(255,255,255,.6); font-size: 0.9rem; margin-top: 12px; }

/* Filter Tabs */
.filter-tabs {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.filter-tab {
    padding: 10px 24px;
    border-radius: 50px;
    font-weight: 500;
    background: var(--gray-100);
    color: var(--gray-600);
    transition: var(--transition);
}
.filter-tab:hover, .filter-tab.active {
    background: var(--primary);
    color: var(--white);
}

/* Register Form */
.register-section {
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

.register-box {
    max-width: 700px;
    margin: 0 auto;
    background: rgba(255,255,255,.95);
    backdrop-filter: blur(12px);
    padding: 48px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255,255,255,.8);
}

.register-header { text-align: center; margin-bottom: 32px; }
.register-header h2 { margin-bottom: 8px; }
.register-header p { color: var(--gray-500); }

.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--gray-700);
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}

.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, 54, 93, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* Alerts */
.alert {
    display: flex;
    gap: 16px;
    padding: 20px;
    border-radius: var(--radius);
    margin-bottom: 24px;
    align-items: flex-start;
}
.alert-success { background: #f0fff4; border: 1px solid #9ae6b4; color: #276749; }
.alert-error { background: #fff5f5; border: 1px solid #feb2b2; color: #c53030; }
.alert span { font-size: 1.5rem; }

/* Article */
.article-section { padding-top: 40px; }
.article-image {
    width: 100%;
    border-radius: var(--radius-lg);
    margin-bottom: 32px;
    max-height: 400px;
    object-fit: cover;
}

.article-content h2 {
    font-family: var(--font-sans);
    font-size: 1.35rem;
    margin: 32px 0 12px;
}
.article-content p { margin-bottom: 16px; }

.article-tags { margin-top: 32px; display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
    padding: 6px 14px;
    background: var(--gray-100);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--gray-600);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 20px;
}
.empty-state span { font-size: 4rem; display: block; margin-bottom: 16px; }
.empty-state h3 { margin-bottom: 8px; }
.empty-state p { color: var(--gray-500); margin-bottom: 24px; }

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: 80px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid var(--gray-700);
}

.footer .logo-text { color: var(--white); }
.footer-brand p { margin-top: 16px; font-size: 0.9rem; line-height: 1.8; }

.footer-links h4, .footer-contact h4 {
    color: var(--white);
    font-family: var(--font-sans);
    font-size: 1rem;
    margin-bottom: 20px;
}

.footer-links li, .footer-contact li { margin-bottom: 12px; }
.footer-links a:hover { color: var(--accent); }

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.875rem;
}

/* Popup */
.popup-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.6);
    backdrop-filter: blur(4px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}
.popup-overlay.active {
    opacity: 1;
    visibility: visible;
}

.popup-modal {
    background: var(--white);
    border-radius: var(--radius-lg);
    max-width: 480px;
    width: 100%;
    overflow: hidden;
    position: relative;
    transform: scale(0.9);
    transition: var(--transition);
    box-shadow: var(--shadow-xl);
}
.popup-overlay.active .popup-modal { transform: scale(1); }

.popup-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(0,0,0,.1);
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    z-index: 1;
    transition: var(--transition);
}
.popup-close:hover { background: rgba(0,0,0,.2); }

.popup-image { width: 100%; max-height: 200px; object-fit: cover; }
.popup-body { padding: 32px; text-align: center; }
.popup-body h3 { margin-bottom: 12px; }
.popup-body p { color: var(--gray-500); margin-bottom: 20px; }

/* Visitor counter */
.top-bar-counter {
    background: var(--primary);
    color: var(--white);
    text-align: center;
    font-size: .85rem;
    padding: 6px 16px;
}
.visitor-counter { display: inline-flex; align-items: center; gap: 6px; }

/* Banner slider */
.banner-slider {
    position: relative;
    width: 100%;
    height: clamp(220px, 42vw, 520px);
    overflow: hidden;
    background: #eef2f7;
}
.banner-track {
    position: relative;
    width: 100%;
    height: 100%;
}
.banner-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity .6s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    box-sizing: border-box;
}
.banner-slide-img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    object-position: center;
    display: block;
}
.banner-slide.active { opacity: 1; z-index: 1; }
.banner-dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 3;
}
.banner-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid var(--primary);
    background: rgba(255, 255, 255, .6);
    cursor: pointer;
    padding: 0;
}
.banner-dot.active { background: var(--primary); }

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
    flex-wrap: wrap;
}
.page-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    color: var(--gray-700);
    font-weight: 500;
    transition: var(--transition);
}
.page-link:hover, .page-link.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--white);
}

/* Blog & Video */
.badge-video { background: #dc2626; color: #fff; }
.filter-tabs-sub { margin-top: -16px; margin-bottom: 32px; }
.filter-tab-sm { font-size: .85rem; padding: 6px 14px; }
.blog-card-media { position: relative; }
.blog-play-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(0,0,0,.75);
    color: #fff;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: .75rem;
    font-weight: 600;
}
.knowledge-image-video {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 180px;
}
.knowledge-image-video span {
    font-size: 3rem;
    color: rgba(255,255,255,.9);
}
.video-embed {
    margin-bottom: 32px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #000;
    box-shadow: var(--shadow-lg);
}
.video-embed video {
    width: 100%;
    max-height: 520px;
    display: block;
    background: #000;
}
.video-embed-iframe {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
}
.video-embed-iframe iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}
.video-embed-link {
    padding: 48px;
    text-align: center;
    background: var(--gray-100);
}
.article-excerpt {
    font-size: 1.15rem;
    color: var(--gray-600);
    margin-bottom: 24px;
    line-height: 1.7;
}

.feature-card,
.portfolio-card,
.course-card,
.knowledge-card {
    transition: transform .35s cubic-bezier(.4,0,.2,1), box-shadow .35s cubic-bezier(.4,0,.2,1);
}

.feature-card:hover,
.portfolio-card:hover,
.course-card:hover,
.knowledge-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.btn-disabled {
    opacity: .65;
    cursor: not-allowed;
    pointer-events: none;
}

/* Status panels */
.status-panel {
    text-align: center;
    padding: 56px 40px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
}
.status-panel-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}
.status-panel h3 {
    margin-bottom: 12px;
    color: var(--primary);
}
.status-panel p {
    color: var(--gray-500);
    max-width: 520px;
    margin: 0 auto 24px;
}
.status-panel-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    align-items: center;
}
.status-contact {
    color: var(--gray-600);
    font-weight: 500;
}

/* Maintenance page */
.maintenance-body {
    min-height: 100vh;
    overflow: hidden;
}
.maintenance-bg {
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, #0a1628 0%, var(--primary-dark) 40%, var(--primary) 100%);
    z-index: 0;
}
.maintenance-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: .35;
}
.maintenance-shape-1 { width: 400px; height: 400px; background: var(--accent); top: -100px; right: -80px; }
.maintenance-shape-2 { width: 300px; height: 300px; background: #4299e1; bottom: 10%; left: -60px; }
.maintenance-shape-3 { width: 250px; height: 250px; background: var(--accent-light); bottom: -60px; right: 20%; }
.maintenance-page {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 24px;
}
.maintenance-card {
    width: 100%;
    max-width: 560px;
    background: rgba(255,255,255,.96);
    backdrop-filter: blur(16px);
    border-radius: 24px;
    padding: 48px 40px;
    text-align: center;
    box-shadow: 0 30px 60px rgba(0,0,0,.25);
    border: 1px solid rgba(255,255,255,.5);
}
.maintenance-brand {
    justify-content: center;
    margin-bottom: 24px;
}
.maintenance-brand .logo-text { color: var(--primary); }
.maintenance-icon {
    font-size: 3.5rem;
    margin-bottom: 16px;
}
.maintenance-card h1 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    color: var(--primary-dark);
    margin-bottom: 16px;
}
.maintenance-message {
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 24px;
}
.maintenance-eta {
    background: var(--gray-50);
    border: 1px dashed var(--accent);
    border-radius: var(--radius);
    padding: 16px 20px;
    margin-bottom: 24px;
}
.maintenance-eta-label {
    display: block;
    font-size: .85rem;
    color: var(--gray-500);
    margin-bottom: 4px;
}
.maintenance-eta strong { color: var(--primary); font-size: 1.05rem; }
.maintenance-contact {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}
.maintenance-contact span { color: var(--gray-500); font-size: .9rem; }
.maintenance-contact a {
    color: var(--primary);
    font-weight: 600;
}
.maintenance-footer-note {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-200);
    color: var(--gray-400);
}

.video-drive-note {
    text-align: center;
    font-size: .85rem;
    color: var(--gray-500);
    margin-top: 12px;
}
.video-embed-drive iframe {
    background: #111;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-content { grid-template-columns: 1fr; }
    .hero-visual { display: none; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
    .knowledge-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        padding: 80px 24px 24px;
        box-shadow: var(--shadow-xl);
        transition: var(--transition);
        align-items: stretch;
    }
    .nav-menu.open { right: 0; }
    .nav-menu a { color: var(--gray-700) !important; padding: 12px 16px; }

    .hero-stats { gap: 24px; }
    .stat-number { font-size: 1.5rem; }

    .features-grid,
    .portfolio-grid,
    .courses-grid,
    .knowledge-grid { grid-template-columns: 1fr; }

    .course-card-full { flex-direction: column; }
    .course-card-full .course-image { width: 100%; height: 200px; }

    .knowledge-card-full { flex-direction: column; }
    .knowledge-image { width: 100%; height: 180px; }

    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }

    .form-row { grid-template-columns: 1fr; }
    .register-box { padding: 32px 24px; }
    .cta-box { padding: 40px 24px; }

    .section { padding: 60px 0; }
}