/* ===== CSS VARIABLES ===== */
:root {
    --h-blue: 217;
    --h-cyan: 176;
    --h-dark: 220;
    
    --bg-dark: hsl(var(--h-dark), 24%, 7%);
    --bg-card-dark: hsl(var(--h-dark), 20%, 12%);
    --bg-light: #F8FAFC;
    --surface: #FFFFFF;
    --blue: hsl(var(--h-blue), 91%, 60%);
    --blue-hover: hsl(var(--h-blue), 91%, 52%);
    --cyan: hsl(var(--h-cyan), 90%, 50%);
    --white: #FFFFFF;
    --text-dark: #0F172A;
    --text-gray: #64748B;
    --text-light: #E2E8F0;
    --border: #E2E8F0;
    --border-dark: hsl(var(--h-dark), 15%, 20%);
    --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.08);
    --shadow-premium: 0 20px 40px -15px rgba(79, 142, 247, 0.15);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-w: 1200px;
    --header-h: 76px;
    
    /* Glassmorphism */
    --glass-bg: rgba(13, 17, 23, 0.75);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: 16px;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--white);
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button, input, textarea, select { font-family: inherit; }

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

/* ===== TYPOGRAPHY ===== */
h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; line-height: 1.15; }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 700; line-height: 1.25; }
h3 { font-size: 1.2rem; font-weight: 600; line-height: 1.3; }
h4 { font-size: 1rem; font-weight: 600; }
p { line-height: 1.7; }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 28px; border-radius: var(--radius-sm);
    font-size: 15px; font-weight: 600; cursor: pointer; border: none;
    transition: var(--transition); white-space: nowrap; text-decoration: none;
}
.btn-primary { background: var(--blue); color: var(--white); }
.btn-primary:hover { background: var(--blue-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79,142,247,0.35); color: white; }
.btn-outline { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.35); }
.btn-outline:hover { border-color: var(--white); background: rgba(255,255,255,0.1); color: white; }
.btn-dark { background: var(--bg-dark); color: var(--white); }
.btn-dark:hover { background: #1c2a3a; transform: translateY(-2px); color: white; }
.btn-ghost { background: rgba(79,142,247,0.1); color: var(--blue); border: 1px solid rgba(79,142,247,0.25); }
.btn-ghost:hover { background: var(--blue); color: white; }

/* ===== BADGE ===== */
.badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 14px; border-radius: 100px; font-size: 13px; font-weight: 600;
    background: rgba(79,142,247,0.12); color: var(--blue);
    border: 1px solid rgba(79,142,247,0.25); margin-bottom: 20px;
}
.badge-type {
    display: inline-block; font-size: 11px; font-weight: 700;
    padding: 2px 8px; border-radius: 100px;
}
.badge-chinh-chu { background: #dcfce7; color: #166534; }
.badge-cap-rieng { background: #dbeafe; color: #1e40af; }
.badge-cap-acc   { background: #fef9c3; color: #854d0e; }

/* ===== SECTION ===== */
.section { padding: 80px 0; }
.section-dark { background: var(--bg-dark); color: var(--white); }
.section-gray { background: var(--bg-light); }
.section-header { text-align: center; margin-bottom: 56px; }
.section-header h2 { margin-bottom: 16px; }
.section-header p { color: var(--text-gray); max-width: 560px; margin: 0 auto; font-size: 17px; }
.section-dark .section-header p { color: var(--text-light); }
.section-cta { text-align: center; margin-top: 48px; }

/* ===== HEADER ===== */
#site-header {
    position: sticky; top: 0; z-index: 1000; 
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--glass-border); 
    height: var(--header-h);
    transition: var(--transition);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 24px; }
.site-logo { display: flex; align-items: center; gap: 10px; color: var(--white); font-size: 18px; font-weight: 800; letter-spacing: -0.5px; flex-shrink: 0; }
.logo-icon { width: 36px; height: 36px; background: linear-gradient(135deg, var(--blue), var(--cyan)); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 18px; }
#site-nav ul { display: flex; align-items: center; gap: 2px; }
#site-nav a { 
    color: var(--text-light); font-size: 14px; font-weight: 500; 
    padding: 8px 16px; border-radius: var(--radius-sm); 
    transition: var(--transition); white-space: nowrap; 
    position: relative;
}
#site-nav a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 16px;
    right: 16px;
    height: 2px;
    background: linear-gradient(90deg, var(--blue), var(--cyan));
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
#site-nav a:hover::after, #site-nav .current a::after {
    transform: scaleX(1);
    transform-origin: left;
}
#site-nav a:hover, #site-nav .current a { color: var(--white); background: rgba(255,255,255,0.05); }
.header-cta { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.header-cta .btn { padding: 9px 18px; font-size: 14px; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; color: var(--white); font-size: 22px; line-height: 1; }

/* ===== ANIMATIONS ===== */
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}
@keyframes pulseGlow {
    0% { opacity: 0.5; }
    50% { opacity: 0.8; }
    100% { opacity: 0.5; }
}

/* ===== HERO ===== */
.hero {
    background: var(--bg-dark);
    background-image: radial-gradient(ellipse at 20% 50%, rgba(79,142,247,0.15) 0%, transparent 55%), radial-gradient(ellipse at 80% 20%, rgba(0,212,200,0.12) 0%, transparent 50%);
    padding: 110px 0 90px; color: var(--white); overflow: hidden;
    position: relative;
}
.hero::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(79,142,247,0.15) 0%, transparent 70%);
    z-index: 1;
    pointer-events: none;
    animation: pulseGlow 8s ease-in-out infinite;
}
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; position: relative; z-index: 2; }
.hero-tag { display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; border-radius: 100px; background: rgba(79,142,247,0.12); border: 1px solid rgba(79,142,247,0.3); color: var(--blue); font-size: 13px; font-weight: 600; margin-bottom: 24px; }
.hero h1 { color: var(--white); margin-bottom: 20px; }
.hero h1 span { background: linear-gradient(135deg, var(--blue), var(--cyan)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-subtitle { font-size: 18px; color: var(--text-light); margin-bottom: 36px; max-width: 480px; }
.hero-buttons { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-visual { display: flex; justify-content: center; }
.hero-card { 
    background: var(--bg-card-dark); 
    border: 1px solid var(--border-dark); 
    border-radius: var(--radius-lg); 
    padding: 32px; 
    max-width: 360px; 
    width: 100%;
    animation: float 6s ease-in-out infinite;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.4);
}
.hero-card-header { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.hero-card-icon { width: 44px; height: 44px; background: linear-gradient(135deg, var(--blue), var(--cyan)); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 22px; flex-shrink: 0; }
.hero-card-title { color: var(--white); font-size: 15px; font-weight: 600; }
.hero-card-sub { color: var(--text-light); font-size: 12px; }
.hero-stat-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 20px; }
.hero-stat { background: rgba(255,255,255,0.05); border-radius: 10px; padding: 14px; text-align: center; }
.hero-stat-num { font-size: 22px; font-weight: 800; color: var(--blue); }
.hero-stat-label { font-size: 11px; color: var(--text-light); margin-top: 2px; }
.progress-row { margin-bottom: 10px; }
.progress-label { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-light); margin-bottom: 5px; }
.progress-bar { height: 6px; background: rgba(255,255,255,0.1); border-radius: 100px; overflow: hidden; }
.progress-fill { height: 100%; border-radius: 100px; background: linear-gradient(90deg, var(--blue), var(--cyan)); }

/* ===== STATS BAR ===== */
.stats-bar { background: white; border-bottom: 1px solid var(--border); padding: 28px 0; box-shadow: 0 2px 12px rgba(0,0,0,0.04); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat-item { text-align: center; padding: 16px 24px; border-right: 1px solid var(--border); }
.stat-item:last-child { border-right: none; }
.stat-num { font-size: 2.25rem; font-weight: 800; color: var(--blue); line-height: 1; margin-bottom: 4px; }
.stat-label { font-size: 14px; color: var(--text-gray); font-weight: 500; }

/* ===== SERVICES GRID ===== */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.service-card {
    background: var(--white); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 36px 28px;
    transition: var(--transition); position: relative; overflow: hidden;
}
.service-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--blue), var(--cyan)); opacity: 0; transition: var(--transition); }
.service-card:hover { transform: translateY(-6px); box-shadow: 0 20px 40px rgba(0,0,0,0.1); }
.service-card:hover::before { opacity: 1; }
.service-icon { width: 56px; height: 56px; background: rgba(79,142,247,0.1); border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 26px; margin-bottom: 20px; }
.service-card h3 { margin-bottom: 12px; }
.service-card p { color: var(--text-gray); font-size: 15px; margin-bottom: 20px; }
.service-link { color: var(--blue); font-size: 14px; font-weight: 600; display: inline-flex; align-items: center; gap: 4px; transition: var(--transition); }
.service-link:hover { gap: 8px; }

/* ===== WHY US ===== */
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px 64px; }
.why-item { display: flex; gap: 20px; }
.why-num { font-size: 3rem; font-weight: 800; color: rgba(79,142,247,0.2); line-height: 1; flex-shrink: 0; width: 72px; text-align: right; }
.why-content h3 { color: var(--white); margin-bottom: 10px; }
.why-content p { color: var(--text-light); font-size: 15px; }

/* ===== HORIZONTAL SCROLL ===== */
.hscroll-wrap { position: relative; }
.hscroll-track {
    display: flex; gap: 20px; overflow-x: auto; scroll-snap-type: x mandatory;
    padding: 4px 2px 16px; -webkit-overflow-scrolling: touch;
    scrollbar-width: thin; scrollbar-color: #cbd5e1 transparent;
}
.hscroll-track::-webkit-scrollbar { height: 8px; }
.hscroll-track::-webkit-scrollbar-track { background: transparent; }
.hscroll-track::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }
.hscroll-track::-webkit-scrollbar-thumb:hover { background: var(--blue); }
.hscroll-track > * { scroll-snap-align: start; flex: 0 0 auto; }

/* ===== MODULE CARD ===== */
.module-card {
    width: 300px; background: #fff; border: 1px solid var(--border);
    border-radius: 14px; padding: 24px; position: relative;
    transition: transform .25s, box-shadow .25s, border-color .25s;
}
.module-card:hover { border-color: var(--blue); transform: translateY(-4px); box-shadow: 0 12px 28px rgba(79,142,247,0.12); }
.module-card-num { position: absolute; top: 14px; right: 16px; font-size: 12px; font-weight: 700; letter-spacing: 1px; color: var(--blue); opacity: .55; }
.module-card-icon { font-size: 40px; line-height: 1; margin-bottom: 16px; }
.module-card h3 { font-size: 17px; margin-bottom: 8px; color: var(--text-dark); }
.module-card p { font-size: 13.5px; color: var(--text-gray); line-height: 1.6; margin: 0; }

/* ===== COURSE PRICE SUMMARY ===== */
.course-price-summary {
    display: flex; justify-content: space-between; align-items: center; gap: 24px;
    max-width: 720px; margin: 40px auto 0; padding: 24px 32px;
    background: #fff; border: 1px solid var(--border);
    border-radius: 16px; box-shadow: 0 8px 24px rgba(0,0,0,0.06); flex-wrap: wrap;
}
.course-price-old { font-size: 14px; color: var(--text-gray); text-decoration: line-through; margin-bottom: 2px; }
.course-price-new { font-size: 28px; font-weight: 800; color: var(--blue); display: flex; align-items: center; gap: 10px; }
.course-price-sale { font-size: 12px; font-weight: 700; color: #e85d04; background: #fff3e0; padding: 3px 10px; border-radius: 100px; }
.course-price-note { font-size: 12.5px; color: var(--text-gray); margin-top: 6px; }
.course-price-cta { padding: 12px 22px; white-space: nowrap; }

/* ===== SERVICE HORIZONTAL CARD ===== */
.svc-hcard {
    width: 320px; background: #fff; border: 1px solid var(--border);
    border-radius: 16px; padding: 24px; display: flex; flex-direction: column;
    position: relative; transition: transform .25s, box-shadow .25s, border-color .25s;
}
.svc-hcard:hover { border-color: var(--blue); transform: translateY(-4px); box-shadow: 0 12px 28px rgba(79,142,247,0.12); }
.svc-hcard-featured { border: 2px solid var(--blue); background: linear-gradient(135deg, rgba(79,142,247,0.05), rgba(0,212,200,0.05)); }
.svc-hcard-ribbon { position: absolute; top: -12px; left: 20px; background: var(--blue); color: #fff; font-size: 11px; font-weight: 700; padding: 4px 12px; border-radius: 100px; letter-spacing: .3px; }
.svc-hcard-icon { font-size: 36px; margin-bottom: 14px; line-height: 1; }
.svc-hcard h3 { font-size: 17px; margin-bottom: 8px; color: var(--text-dark); }
.svc-hcard p { font-size: 13.5px; color: var(--text-gray); line-height: 1.6; margin: 0 0 20px; flex: 1; }
.svc-hcard-foot { display: flex; justify-content: space-between; align-items: flex-end; gap: 12px; padding-top: 16px; border-top: 1px solid var(--border); }
.svc-hcard-price { font-size: 20px; font-weight: 800; color: var(--blue); }
.svc-hcard-unit { font-size: 11.5px; color: var(--text-gray); margin-top: 2px; }

/* ===== SERVICE ROW CARD ===== */
.service-row-card {
    display: flex; gap: 24px; align-items: flex-start;
    padding: 28px; background: white; border: 1px solid var(--border);
    border-radius: 16px; transition: box-shadow 0.3s, border-color 0.3s;
}
.service-row-card:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.08); border-color: var(--blue); }
.service-row-icon { font-size: 32px; width: 64px; height: 64px; background: var(--surface); border-radius: 16px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.service-row-body { flex: 1; }
.service-row-body h3 { font-size: 19px; margin-bottom: 8px; }
.service-row-body p  { font-size: 14px; color: var(--text-gray); line-height: 1.6; }
.svc-tag { display: inline-block; font-size: 12px; padding: 4px 10px; background: var(--surface); border: 1px solid var(--border); border-radius: 100px; color: var(--text-gray); }

/* ===== TESTIMONIAL ===== */
.testimonial {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #091428 100%);
    padding: 80px 0; text-align: center; color: var(--white);
}
.testimonial-quote { font-size: clamp(1.1rem, 2.5vw, 1.4rem); font-style: italic; color: var(--text-light); max-width: 720px; margin: 0 auto 28px; line-height: 1.7; }
.testimonial-quote strong { color: var(--white); font-style: normal; }
.testimonial-author { font-size: 14px; color: var(--blue); font-weight: 600; }

/* ===== BLOG / POST CARDS ===== */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.post-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: var(--transition); }
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.post-thumb { height: 160px; background: var(--bg-light); display: flex; align-items: center; justify-content: center; font-size: 48px; }
.post-body { padding: 20px; }
.post-cat { font-size: 11px; font-weight: 700; color: var(--blue); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.post-body h3 { font-size: 16px; margin-bottom: 8px; }
.post-body h3 a { color: var(--text-dark); transition: var(--transition); }
.post-body h3 a:hover { color: var(--blue); }
.post-body p { color: var(--text-gray); font-size: 14px; margin-bottom: 16px; }
.post-meta { font-size: 13px; color: var(--text-gray); }

/* ===== NEWSLETTER ===== */
.newsletter {
    background: linear-gradient(135deg, rgba(79,142,247,0.07), rgba(0,212,200,0.07));
    border: 1px solid rgba(79,142,247,0.2); border-radius: var(--radius-lg);
    padding: 56px 48px; text-align: center;
}
.newsletter h2 { margin-bottom: 12px; }
.newsletter p { color: var(--text-gray); margin-bottom: 28px; font-size: 17px; }
.newsletter-form { display: flex; gap: 12px; max-width: 480px; margin: 0 auto; }
.newsletter-form input { flex: 1; padding: 14px 20px; border: 1.5px solid var(--border); border-radius: var(--radius-sm); font-size: 15px; outline: none; transition: var(--transition); }
.newsletter-form input:focus { border-color: var(--blue); }

/* ===== FOOTER ===== */
#site-footer { background: var(--bg-dark); color: var(--text-light); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 48px; border-bottom: 1px solid var(--border-dark); }
.footer-brand .site-logo { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--text-light); max-width: 260px; margin-bottom: 20px; line-height: 1.7; }
.social-links { display: flex; gap: 10px; }
.social-link { width: 36px; height: 36px; border-radius: 8px; background: rgba(255,255,255,0.07); display: flex; align-items: center; justify-content: center; font-size: 15px; transition: var(--transition); color: var(--text-light); font-weight: 700; }
.social-link:hover { background: var(--blue); color: white; }
.footer-col h4 { color: var(--white); font-size: 14px; margin-bottom: 16px; font-weight: 600; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 14px; color: var(--text-light); transition: var(--transition); }
.footer-col a:hover { color: var(--white); }
.footer-contact p { font-size: 14px; color: var(--text-light); margin-bottom: 10px; display: flex; align-items: flex-start; gap: 8px; }
.footer-bottom { padding: 20px 0; display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: var(--text-gray); }

/* ===== PAGE HERO (inner pages) ===== */
.page-hero {
    background: var(--bg-dark);
    background-image: radial-gradient(ellipse at 30% 50%, rgba(79,142,247,0.1) 0%, transparent 60%);
    padding: 64px 0; color: var(--white); text-align: center;
}
.page-hero .badge { margin-bottom: 16px; }
.page-hero h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); margin-bottom: 14px; }
.page-hero p { color: var(--text-light); max-width: 560px; margin: 0 auto; font-size: 17px; }

/* ===== PRODUCTS GRID ===== */
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.product-card {
    background: var(--white); border: 1.5px solid var(--border);
    border-radius: var(--radius); padding: 28px; transition: var(--transition);
    display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: var(--blue); }
.product-icon { font-size: 40px; margin-bottom: 16px; }
.product-card h3 { font-size: 17px; margin-bottom: 10px; }
.product-card p { color: var(--text-gray); font-size: 14px; margin-bottom: 20px; flex: 1; line-height: 1.6; }
.product-price { font-size: 24px; font-weight: 800; color: var(--blue); margin-bottom: 16px; }
.product-price span { font-size: 14px; font-weight: 400; color: var(--text-gray); }
.product-features { margin-bottom: 20px; display: flex; flex-direction: column; gap: 7px; }
.product-features li { font-size: 13px; color: var(--text-gray); display: flex; align-items: flex-start; gap: 7px; }
.product-features li::before { content: '✓'; color: var(--blue); font-weight: 700; flex-shrink: 0; margin-top: 1px; }
.product-card .btn { width: 100%; justify-content: center; }

/* ===== COURSE PAGE ===== */
.course-main-layout { display: grid; grid-template-columns: 1fr 340px; gap: 40px; align-items: start; }
.course-description { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 32px; margin-bottom: 32px; }
.course-meta-bar { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--border); font-size: 14px; color: var(--text-gray); }
.course-curriculum h2, .course-description h2, .course-for-who h2 { font-size: 22px; margin-bottom: 16px; }
.module-list { display: flex; flex-direction: column; gap: 12px; }
.module-item { display: flex; gap: 16px; align-items: flex-start; padding: 20px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; transition: border-color 0.3s, box-shadow 0.3s; }
.module-item:hover { border-color: var(--blue); box-shadow: 0 4px 16px rgba(79,142,247,0.1); }
.module-icon { font-size: 28px; flex-shrink: 0; line-height: 1; margin-top: 2px; }
.module-title { font-weight: 700; font-size: 16px; margin-bottom: 6px; color: var(--text-dark); }
.module-desc { font-size: 14px; color: var(--text-gray); line-height: 1.6; }
.course-sidebar { position: sticky; top: 90px; }
.course-price-card { background: white; border: 2px solid var(--border); border-radius: 16px; padding: 28px; box-shadow: 0 8px 32px rgba(0,0,0,0.08); }

/* ===== ABOUT PAGE ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about-visual {
    background: var(--bg-card-dark); border-radius: var(--radius-lg);
    padding: 48px 36px; text-align: center; color: white; border: 1px solid var(--border-dark);
}
.about-visual-icon { font-size: 72px; margin-bottom: 20px; }
.about-visual h3 { color: white; margin-bottom: 10px; font-size: 1.3rem; }
.about-visual p { color: var(--text-light); font-size: 14px; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 28px; }
.about-stat { background: rgba(255,255,255,0.06); border-radius: 10px; padding: 16px; text-align: center; }
.about-stat-num { font-size: 24px; font-weight: 800; color: var(--blue); }
.about-stat-label { font-size: 12px; color: var(--text-light); margin-top: 2px; }
.about-content h2 { margin-bottom: 16px; }
.about-content p { color: var(--text-gray); margin-bottom: 16px; font-size: 16px; }
.values-list { margin-top: 28px; display: flex; flex-direction: column; gap: 18px; }
.value-item { display: flex; gap: 14px; align-items: flex-start; }
.value-icon { font-size: 22px; flex-shrink: 0; width: 44px; height: 44px; background: rgba(79,142,247,0.1); border-radius: 10px; display: flex; align-items: center; justify-content: center; }
.value-item h4 { margin-bottom: 4px; }
.value-item p { color: var(--text-gray); font-size: 14px; margin: 0; }

/* ===== CONTACT PAGE ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 64px; align-items: start; }
.contact-info h2 { margin-bottom: 14px; }
.contact-info > p { color: var(--text-gray); margin-bottom: 36px; font-size: 16px; }
.contact-items { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; gap: 14px; align-items: flex-start; }
.contact-item-icon { width: 44px; height: 44px; background: rgba(79,142,247,0.1); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 18px; flex-shrink: 0; }
.contact-item h4 { margin-bottom: 3px; font-size: 13px; color: var(--text-gray); font-weight: 500; }
.contact-item p { font-size: 15px; font-weight: 600; color: var(--text-dark); margin: 0; }
.contact-form { background: var(--white); border: 1.5px solid var(--border); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow); }
.contact-form h3 { margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 6px; color: var(--text-dark); }
.form-group input, .form-group textarea, .form-group select {
    width: 100%; padding: 12px 16px; border: 1.5px solid var(--border);
    border-radius: var(--radius-sm); font-size: 15px; outline: none;
    transition: var(--transition); background: white; color: var(--text-dark); appearance: none;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(79,142,247,0.1); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit { width: 100%; justify-content: center; margin-top: 4px; font-size: 16px; padding: 14px; }

/* ===== FAQ ===== */
details > summary { cursor: pointer; padding: 20px 24px; font-weight: 600; font-size: 15px; list-style: none; display: flex; justify-content: space-between; align-items: center; }
details > summary::-webkit-details-marker { display: none; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .hero-subtitle { margin: 0 auto 36px; }
    .hero-buttons { justify-content: center; }
    .hero-visual { display: none; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
    .course-main-layout { grid-template-columns: 1fr; }
    .course-sidebar { position: static; order: -1; }
}
@media (max-width: 768px) {
    .section { padding: 56px 0; }
    #site-nav { display: none; }
    #site-nav.open { display: block; position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0; background: var(--bg-dark); padding: 20px; z-index: 999; overflow-y: auto; }
    #site-nav.open ul { flex-direction: column; gap: 4px; }
    #site-nav.open a { display: block; padding: 13px 16px; font-size: 16px; }
    .nav-toggle { display: block; }
    .header-cta .btn-ghost { display: none; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat-item:nth-child(2) { border-right: none; }
    .stat-item:nth-child(3) { border-top: 1px solid var(--border); border-right: 1px solid var(--border); }
    .stat-item:nth-child(4) { border-top: 1px solid var(--border); border-right: none; }
    .services-grid { grid-template-columns: 1fr; }
    .why-grid { grid-template-columns: 1fr; gap: 28px; }
    .blog-grid { grid-template-columns: 1fr; }
    .products-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
    .newsletter { padding: 36px 20px; }
    .newsletter-form { flex-direction: column; }
    .contact-form { padding: 28px 20px; }
    .form-row { grid-template-columns: 1fr; }
    .module-card, .svc-hcard { width: 270px; }
    .course-price-summary { padding: 20px; text-align: center; justify-content: center; }
    .course-price-summary > * { width: 100%; }
    .course-price-new { justify-content: center; }
    .course-price-cta { justify-content: center; }
    .service-row-card { flex-direction: column; }
    .service-row-icon { width: 48px; height: 48px; font-size: 24px; }
}
@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .hero-buttons { flex-direction: column; }
    .hero-buttons .btn { width: 100%; justify-content: center; }
}