/* ===================================
   AI Course Hong Kong — Main Stylesheet
   =================================== */

/* --- CSS Variables --- */
:root {
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #818CF8;
    --primary-bg: #EEF2FF;
    --secondary: #0EA5E9;
    --secondary-dark: #0284C7;
    --accent: #F59E0B;
    --accent-light: #FDE68A;
    --dark: #0F172A;
    --dark-700: #1E293B;
    --dark-600: #334155;
    --gray-500: #64748B;
    --gray-400: #94A3B8;
    --gray-300: #CBD5E1;
    --gray-200: #E2E8F0;
    --gray-100: #F1F5F9;
    --gray-50: #F8FAFC;
    --white: #FFFFFF;
    --success: #10B981;
    --danger: #EF4444;
    --gradient-primary: linear-gradient(135deg, #4F46E5, #0EA5E9);
    --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #312E81 100%);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --font-sans: 'Noto Sans TC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--dark);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

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

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    line-height: 1.3;
    font-weight: 700;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-sans);
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(79, 70, 229, 0.35);
    color: var(--white);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: rgba(255,255,255,0.4);
}

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

.btn-lg {
    padding: 16px 36px;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    transition: all var(--transition);
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--white);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 800;
    color: var(--white);
    letter-spacing: -0.5px;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--white);
}

.logo-hk {
    color: var(--secondary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-links a {
    color: rgba(255,255,255,0.75);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.925rem;
    font-weight: 500;
    transition: all var(--transition);
}

.nav-links a:hover {
    color: var(--white);
    background: rgba(255,255,255,0.08);
}

.nav-cta {
    background: var(--gradient-primary) !important;
    color: var(--white) !important;
    padding: 8px 20px !important;
    border-radius: var(--radius-md) !important;
    margin-left: 8px;
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

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

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero-bg-shapes {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.08;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: var(--primary);
    top: -200px;
    right: -100px;
    animation: float 20s ease-in-out infinite;
}

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

.shape-3 {
    width: 250px;
    height: 250px;
    background: var(--accent);
    top: 40%;
    right: 20%;
    animation: float 18s ease-in-out infinite;
}

@keyframes float {
    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 {
    text-align: center;
    position: relative;
    z-index: 2;
    max-width: 820px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 6px 18px;
    background: rgba(79, 70, 229, 0.2);
    border: 1px solid rgba(79, 70, 229, 0.3);
    border-radius: 50px;
    color: var(--primary-light);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.hero h1 {
    font-size: clamp(2.2rem, 5.5vw, 3.8rem);
    font-weight: 900;
    color: var(--white);
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, #818CF8, #38BDF8, #818CF8);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 4s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { background-position: 0% center; }
    50% { background-position: 200% center; }
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: rgba(255,255,255,0.7);
    margin-bottom: 40px;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.hero-subtitle strong {
    color: var(--white);
}

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

.hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

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

.stat-suffix {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-light);
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: rgba(255,255,255,0.5);
    margin-top: 6px;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.3);
    font-size: 0.75rem;
    animation: bounce 2s ease-in-out infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid rgba(255,255,255,0.3);
    border-bottom: 2px solid rgba(255,255,255,0.3);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* --- Section Styling --- */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 660px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    color: var(--dark);
    margin-bottom: 16px;
}

.section-header p {
    font-size: 1.05rem;
    color: var(--gray-500);
    line-height: 1.8;
}

/* --- Course Filter Tabs --- */
.course-filters {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.filter-btn {
    padding: 10px 24px;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-500);
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font-sans);
}

.filter-btn:hover {
    background: var(--primary-bg);
    color: var(--primary);
    border-color: var(--primary-light);
}

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

/* --- Course Cards --- */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}

.course-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    flex-direction: column;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition);
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

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

.course-card.hidden {
    display: none;
}

.card-icon {
    width: 52px;
    height: 52px;
    color: var(--primary);
    margin-bottom: 20px;
}

.card-icon svg {
    width: 100%;
    height: 100%;
}

.card-content {
    flex: 1;
}

.card-tag {
    display: inline-block;
    padding: 3px 10px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.card-content h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--dark);
}

.card-content p {
    color: var(--gray-500);
    font-size: 0.95rem;
    margin-bottom: 16px;
    line-height: 1.7;
}

.card-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.card-topics li {
    padding: 4px 12px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--gray-500);
}

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

.card-level {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--gray-500);
}

.level-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.level-dot.beginner { background: var(--success); }
.level-dot.intermediate { background: var(--accent); }
.level-dot.advanced { background: var(--danger); }

.card-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
}

.card-link:hover {
    color: var(--primary-dark);
}

/* --- Why Us / Features --- */
.why-us {
    background: var(--gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: all var(--transition);
    position: relative;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary-bg);
    line-height: 1;
    margin-bottom: 16px;
    transition: color var(--transition);
}

.feature-card:hover .feature-number {
    color: var(--primary-light);
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--dark);
}

.feature-card p {
    color: var(--gray-500);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* --- Trainer Section --- */
.trainer {
    background: var(--white);
}

.trainer-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.trainer-image {
    position: relative;
}

.trainer-image-photo {
    width: 100%;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-bg), var(--gray-100));
}

.trainer-image-photo img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-xl);
    object-fit: cover;
}

.trainer-badges {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 20px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--dark);
    transition: all var(--transition);
}

.badge:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}

.trainer-info .section-tag {
    margin-bottom: 12px;
}

.trainer-info h2 {
    font-size: 2.5rem;
    color: var(--dark);
    margin-bottom: 4px;
}

.trainer-info h3 {
    font-size: 1.1rem;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 24px;
}

.trainer-info p {
    color: var(--gray-500);
    line-height: 1.8;
    margin-bottom: 16px;
}

.trainer-info strong {
    color: var(--dark);
}

.trainer-highlights {
    display: flex;
    gap: 32px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--gray-200);
}

.highlight {
    text-align: center;
}

.highlight-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.highlight-text {
    display: block;
    font-size: 0.8rem;
    color: var(--gray-500);
    margin-top: 6px;
}

/* --- Tool Explorer --- */
.tool-explorer {
    background: var(--gray-50);
}

.tool-carousel {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.tool-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px 24px;
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition);
    min-width: 110px;
}

.tool-item:hover {
    border-color: var(--primary-light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.tool-item.active {
    border-color: var(--primary);
    background: var(--primary-bg);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.tool-icon-wrap {
    font-size: 2rem;
    line-height: 1;
}

.tool-item span:last-child {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--dark);
}

.tool-detail {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 32px;
    min-height: 120px;
    transition: all var(--transition);
}

.tool-detail-placeholder {
    text-align: center;
    color: var(--gray-400);
    font-size: 1rem;
}

.tool-detail h4 {
    font-size: 1.2rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.tool-detail p {
    color: var(--gray-500);
    line-height: 1.7;
}

.tool-detail .tool-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.tool-detail .tool-tag {
    padding: 4px 12px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* --- FAQ Section --- */
.faq {
    background: var(--white);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    overflow: hidden;
    transition: all var(--transition);
}

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

.faq-item[open] {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-sm);
}

.faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    cursor: pointer;
    list-style: none;
    font-weight: 600;
    color: var(--dark);
    transition: all var(--transition);
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary:hover {
    color: var(--primary);
}

.faq-question {
    flex: 1;
    font-size: 1rem;
}

.faq-toggle {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--gray-100);
    color: var(--gray-500);
    font-size: 1.2rem;
    flex-shrink: 0;
    margin-left: 16px;
    transition: all var(--transition);
}

.faq-item[open] .faq-toggle {
    background: var(--primary);
    color: var(--white);
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 24px 20px;
}

.faq-answer p {
    color: var(--gray-500);
    line-height: 1.8;
}

.faq-answer strong {
    color: var(--dark);
}

/* --- Contact Section --- */
.contact {
    background: var(--gray-50);
}

.contact-center {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.contact-center .section-tag {
    margin-bottom: 12px;
}

.contact-center h2 {
    font-size: 2rem;
    color: var(--dark);
    margin-bottom: 16px;
}

.contact-desc {
    color: var(--gray-500);
    margin-bottom: 40px;
    line-height: 1.8;
}

.contact-details-center {
    display: flex;
    gap: 40px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.contact-email-btn {
    margin-top: 8px;
}

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

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-icon {
    font-size: 1.5rem;
    line-height: 1;
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-item strong {
    display: block;
    font-size: 0.95rem;
    color: var(--dark);
    margin-bottom: 2px;
}

.contact-item p {
    font-size: 0.9rem;
    color: var(--gray-500);
}


/* --- SEO Content Section --- */
.seo-content {
    background: var(--white);
    border-top: 1px solid var(--gray-200);
}

.seo-content-inner {
    max-width: 900px;
    margin: 0 auto;
}

.seo-content h2 {
    font-size: 1.6rem;
    color: var(--dark);
    margin-bottom: 32px;
    text-align: center;
}

.seo-text p {
    color: var(--gray-500);
    line-height: 2;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.seo-text strong {
    color: var(--dark-600);
}

.seo-text h3 {
    font-size: 1.1rem;
    color: var(--dark);
    margin-top: 32px;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--gray-200);
}

.seo-text ul {
    padding-left: 20px;
    margin-bottom: 20px;
}

.seo-text li {
    color: var(--gray-500);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 6px;
}

.seo-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0 24px;
    font-size: 0.88rem;
}

.seo-table th,
.seo-table td {
    border: 1px solid var(--gray-200);
    padding: 10px 14px;
    text-align: left;
    color: var(--gray-600);
}

.seo-table th {
    background: var(--gray-50);
    color: var(--dark);
    font-weight: 700;
    font-size: 0.85rem;
}

.seo-table tr:nth-child(even) {
    background: var(--gray-50);
}

.seo-table td:first-child {
    font-weight: 600;
    color: var(--dark);
    white-space: nowrap;
}

@media (max-width: 768px) {
    .seo-table {
        font-size: 0.8rem;
    }
    .seo-table th,
    .seo-table td {
        padding: 8px 10px;
    }
}

/* --- Footer --- */
.footer {
    background: var(--dark);
    color: rgba(255,255,255,0.6);
    padding: 60px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: rgba(255,255,255,0.5);
}

.footer-links h4 {
    font-size: 0.95rem;
    color: var(--white);
    margin-bottom: 16px;
    font-weight: 600;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-links a {
    color: rgba(255,255,255,0.5);
    font-size: 0.875rem;
    transition: color var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
}

.footer-seo {
    margin-top: 8px;
    font-size: 0.75rem !important;
    color: rgba(255,255,255,0.2) !important;
}

/* --- Animations --- */
[data-aos] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

[data-aos="fade-right"].aos-animate {
    transform: translateX(0);
}

[data-aos="fade-left"] {
    transform: translateX(30px);
}

[data-aos="fade-left"].aos-animate {
    transform: translateX(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .trainer-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-details-center {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(15, 23, 42, 0.98);
        flex-direction: column;
        padding: 24px;
        gap: 4px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition);
        backdrop-filter: blur(16px);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-links a {
        padding: 12px 16px;
        width: 100%;
        display: block;
    }

    .nav-cta {
        margin-left: 0 !important;
        text-align: center;
        margin-top: 8px;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .hero-scroll-indicator {
        display: none;
    }

    section {
        padding: 64px 0;
    }

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

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

    .course-filters {
        gap: 6px;
    }

    .filter-btn {
        padding: 8px 16px;
        font-size: 0.8rem;
    }

    .trainer-highlights {
        gap: 20px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .tool-item {
        min-width: 90px;
        padding: 14px 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .btn-lg {
        padding: 14px 28px;
        font-size: 1rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

}