:root {
    --black: #0a0a0a;
    --dark: #111111;
    --gray-900: #1a1a1a;
    --gray-800: #2a2a2a;
    --gray-700: #3a3a3a;
    --gray-600: #555555;
    --gray-500: #777777;
    --gray-400: #999999;
    --gray-300: #bbbbbb;
    --gray-200: #dddddd;
    --gray-100: #eeeeee;
    --white: #ffffff;
    --accent: #111111;
    --radius: 6px;
    --shadow: 0 4px 20px rgba(0,0,0,0.15);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.25);
    --transition: all .25s ease;
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
    font-family:'Inter',system-ui,-apple-system,sans-serif;
    background:var(--white);
    color:var(--dark);
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
}
img { max-width:100%; display:block; }
a { text-decoration:none; color:inherit; }
ul { list-style:none; }

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

/* Buttons */
.btn {
    display:inline-flex; align-items:center; justify-content:center;
    padding:10px 24px; border-radius:var(--radius); font-weight:500;
    font-size:.95rem; cursor:pointer; border:1px solid transparent;
    transition:var(--transition); gap:8px;
}
.btn-primary { background:var(--black); color:var(--white); }
.btn-primary:hover { background:var(--gray-800); transform:translateY(-1px); }
.btn-outline { background:transparent; color:var(--dark); border-color:var(--gray-700); }
.btn-outline:hover { background:var(--dark); color:var(--white); }
.btn-lg { padding:14px 32px; font-size:1.05rem; }
.btn-sm { padding:6px 14px; font-size:.85rem; }
.btn-danger { background:#b91c1c; color:#fff; }
.btn-danger:hover { background:#991b1b; }
.btn-success { background:#15803d; color:#fff; }
.btn-success:hover { background:#166534; }

/* Header */
.header {
    position:sticky; top:0; z-index:1000;
    background:rgba(255,255,255,.92); backdrop-filter:blur(12px);
    border-bottom:1px solid var(--gray-200);
}
.header-inner { display:flex; align-items:center; justify-content:space-between; height:64px; }
.logo { font-weight:800; font-size:1.3rem; letter-spacing:.5px; color:var(--black); }
.logo span { font-weight:300; color:var(--gray-600); }
.nav { display:flex; align-items:center; gap:28px; }
.nav a { font-size:.9rem; font-weight:500; color:var(--gray-700); transition:var(--transition); }
.nav a:hover { color:var(--black); }
.menu-toggle { display:none; background:none; border:none; cursor:pointer; flex-direction:column; gap:5px; }
.menu-toggle span { display:block; width:24px; height:2px; background:var(--black); transition:.3s; }

/* Hero */
.hero { position:relative; min-height:80vh; display:flex; align-items:center; overflow:hidden; }
.hero-bg {
    position:absolute; inset:0; z-index:0;
    background:linear-gradient(135deg,#0a0a0a 0%,#1a1a1a 50%,#2a2a2a 100%);
}
.hero-bg::after {
    content:''; position:absolute; inset:0;
    background:url('https://images.unsplash.com/photo-1582560475093-ba66accbc424?w=1600&q=80') center/cover;
    opacity:.25; mix-blend-mode:luminosity;
}
.hero-content { position:relative; z-index:1; color:var(--white); max-width:700px; }
.hero-content h1 { font-size:clamp(2.2rem,5vw,3.8rem); font-weight:800; line-height:1.1; margin-bottom:20px; }
.hero-sub { font-size:clamp(1rem,2vw,1.25rem); color:var(--gray-300); margin-bottom:32px; max-width:560px; }
.hero-btns { display:flex; gap:16px; flex-wrap:wrap; }

/* Stats */
.stats { padding:80px 0; background:var(--gray-100); }
.stats-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:32px; text-align:center; }
.stat-number { font-size:2.8rem; font-weight:800; color:var(--black); line-height:1; }
.stat-label { margin-top:8px; font-size:.9rem; color:var(--gray-600); text-transform:uppercase; letter-spacing:1px; }

/* Story */
.story { padding:100px 0; }
.story-grid { display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center; }
.story-img img { border-radius:var(--radius); width:100%; height:auto; object-fit:cover; }
.story-text h2 { font-size:2rem; font-weight:700; margin-bottom:20px; }
.story-text p { color:var(--gray-600); margin-bottom:16px; }

/* Section head */
.section-head { text-align:center; margin-bottom:48px; }
.section-head h2 { font-size:1.8rem; font-weight:700; margin-bottom:10px; }
.section-head p { color:var(--gray-600); max-width:500px; margin:0 auto; }

/* Courses */
.courses-section { padding:80px 0; }
.courses-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(320px,1fr)); gap:28px; }
.course-card { background:var(--white); border:1px solid var(--gray-200); border-radius:var(--radius); overflow:hidden; transition:var(--transition); }
.course-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-lg); }
.course-img { height:200px; overflow:hidden; }
.course-img img { width:100%; height:100%; object-fit:cover; transition:transform .4s; }
.course-card:hover .course-img img { transform:scale(1.05); }
.course-body { padding:24px; }
.course-body h3 { font-size:1.15rem; font-weight:600; margin-bottom:8px; }
.course-body p { color:var(--gray-600); font-size:.9rem; margin-bottom:16px; }
.course-meta { display:flex; align-items:center; justify-content:space-between; }
.course-price { font-size:1.1rem; font-weight:700; color:var(--black); }

/* CTA */
.cta { padding:100px 0; text-align:center; background:var(--black); color:var(--white); }
.cta h2 { font-size:2rem; margin-bottom:12px; }
.cta p { color:var(--gray-400); margin-bottom:28px; }

/* Footer */
.footer { background:var(--gray-900); color:var(--gray-300); padding:64px 0 0; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; margin-bottom:48px; }
.footer h4 { color:var(--white); font-size:.9rem; margin-bottom:16px; text-transform:uppercase; letter-spacing:1px; }
.footer a { display:block; color:var(--gray-400); font-size:.9rem; margin-bottom:8px; transition:var(--transition); }
.footer a:hover { color:var(--white); }
.footer-bottom { border-top:1px solid var(--gray-800); padding:24px 0; text-align:center; font-size:.85rem; color:var(--gray-500); }

/* Page header */
.page-header { padding:80px 0 40px; background:var(--gray-100); text-align:center; }
.page-header h1 { font-size:2rem; font-weight:700; }
.page-header p { color:var(--gray-600); margin-top:8px; }

/* Forms */
.form-group { margin-bottom:20px; }
.form-group label { display:block; font-size:.85rem; font-weight:500; margin-bottom:6px; color:var(--gray-700); }
.form-control {
    width:100%; padding:12px 14px; border:1px solid var(--gray-300);
    border-radius:var(--radius); font-size:.95rem; background:var(--white);
    transition:var(--transition); font-family:inherit;
}
.form-control:focus { outline:none; border-color:var(--black); box-shadow:0 0 0 3px rgba(0,0,0,.06); }
textarea.form-control { min-height:120px; resize:vertical; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:16px; }

/* Auth */
.auth-box { max-width:420px; margin:60px auto; padding:40px; border:1px solid var(--gray-200); border-radius:var(--radius); background:var(--white); }
.auth-box h2 { text-align:center; margin-bottom:24px; }
.auth-links { text-align:center; margin-top:20px; font-size:.9rem; color:var(--gray-600); }
.auth-links a { color:var(--black); font-weight:500; text-decoration:underline; }

/* Alerts */
.alert { padding:14px 18px; border-radius:var(--radius); margin-bottom:20px; font-size:.9rem; }
.alert-success { background:#dcfce7; color:#166534; border:1px solid #86efac; }
.alert-error { background:#fee2e2; color:#991b1b; border:1px solid #fca5a5; }
.alert-info { background:#e0f2fe; color:#075985; border:1px solid #7dd3fc; }

/* Cards grid */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:20px; }
.card { background:var(--white); border:1px solid var(--gray-200); border-radius:var(--radius); padding:24px; transition:var(--transition); }
.card:hover { box-shadow:var(--shadow); }
.card h3 { font-size:1rem; font-weight:600; margin-bottom:6px; }
.card p { font-size:.85rem; color:var(--gray-600); }

/* Tables */
.table-wrap { overflow-x:auto; border:1px solid var(--gray-200); border-radius:var(--radius); }
table { width:100%; border-collapse:collapse; font-size:.9rem; }
th, td { padding:12px 16px; text-align:left; border-bottom:1px solid var(--gray-200); }
th { background:var(--gray-100); font-weight:600; font-size:.8rem; text-transform:uppercase; letter-spacing:.5px; color:var(--gray-600); }
tr:hover td { background:var(--gray-50); }

/* Tabs */
.tabs { display:flex; gap:4px; border-bottom:1px solid var(--gray-200); margin-bottom:24px; }
.tab { padding:10px 20px; font-size:.9rem; font-weight:500; color:var(--gray-600); cursor:pointer; border-bottom:2px solid transparent; transition:var(--transition); background:none; border-top:none; border-left:none; border-right:none; }
.tab.active { color:var(--black); border-bottom-color:var(--black); }
.tab:hover { color:var(--black); }

/* Admin */
.admin-layout { display:grid; grid-template-columns:240px 1fr; min-height:100vh; }
.admin-sidebar { background:var(--black); color:var(--white); padding:24px; }
.admin-sidebar .logo { color:var(--white); margin-bottom:32px; display:block; }
.admin-sidebar nav { display:flex; flex-direction:column; gap:4px; }
.admin-sidebar a { padding:10px 14px; border-radius:var(--radius); font-size:.9rem; color:var(--gray-400); transition:var(--transition); }
.admin-sidebar a:hover, .admin-sidebar a.active { background:var(--gray-800); color:var(--white); }
.admin-main { padding:32px; background:var(--gray-100); }
.admin-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:32px; }
.admin-header h1 { font-size:1.4rem; }

/* Progress bar */
.progress-bar { height:6px; background:var(--gray-200); border-radius:3px; overflow:hidden; }
.progress-fill { height:100%; background:var(--black); transition:width .4s; }

/* Step list */
.step-list { display:flex; flex-direction:column; gap:12px; }
.step-item { display:flex; align-items:center; gap:16px; padding:16px; border:1px solid var(--gray-200); border-radius:var(--radius); background:var(--white); cursor:pointer; transition:var(--transition); }
.step-item:hover { border-color:var(--gray-400); }
.step-item.active { border-color:var(--black); background:var(--gray-100); }
.step-check { width:28px; height:28px; border-radius:50%; border:2px solid var(--gray-300); display:flex; align-items:center; justify-content:center; font-size:.8rem; color:transparent; flex-shrink:0; }
.step-check.done { background:var(--black); border-color:var(--black); color:var(--white); }
.step-title { font-weight:500; }
.step-meta { font-size:.8rem; color:var(--gray-500); margin-top:2px; }

/* Video wrapper */
.video-wrapper { position:relative; background:var(--black); border-radius:var(--radius); overflow:hidden; aspect-ratio:16/9; }
.video-wrapper iframe, .video-wrapper video { width:100%; height:100%; border:none; }
.video-overlay {
    position:absolute; inset:0; z-index:2; cursor:pointer;
    background:rgba(0,0,0,.6); display:flex; align-items:center; justify-content:center;
}
.video-overlay .play-btn { width:72px; height:72px; border-radius:50%; background:var(--white); display:flex; align-items:center; justify-content:center; transition:transform .2s; }
.video-overlay .play-btn:hover { transform:scale(1.1); }
.video-overlay .play-btn::after { content:''; width:0; height:0; border-left:20px solid var(--black); border-top:12px solid transparent; border-bottom:12px solid transparent; margin-left:4px; }

/* Gallery */
.gallery-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:16px; }
.gallery-item { position:relative; border-radius:var(--radius); overflow:hidden; aspect-ratio:1; cursor:pointer; }
.gallery-item img { width:100%; height:100%; object-fit:cover; transition:transform .4s; }
.gallery-item:hover img { transform:scale(1.08); }
.gallery-overlay { position:absolute; inset:0; background:rgba(0,0,0,.5); opacity:0; transition:opacity .3s; display:flex; align-items:flex-end; padding:16px; }
.gallery-item:hover .gallery-overlay { opacity:1; }
.gallery-overlay span { color:var(--white); font-weight:500; font-size:.9rem; }

/* Forum / Chat */
.forum-post { display:flex; gap:16px; padding:20px; border-bottom:1px solid var(--gray-200); }
.forum-avatar { width:44px; height:44px; border-radius:50%; background:var(--gray-800); color:var(--white); display:flex; align-items:center; justify-content:center; font-weight:600; font-size:.9rem; flex-shrink:0; }
.forum-body { flex:1; }
.forum-head { display:flex; align-items:center; gap:10px; margin-bottom:6px; }
.forum-name { font-weight:600; font-size:.9rem; }
.forum-time { font-size:.8rem; color:var(--gray-500); }
.forum-text { color:var(--gray-700); font-size:.9rem; line-height:1.5; }
.forum-img { margin-top:10px; border-radius:var(--radius); max-width:320px; }

/* Messages */
.msg-list a { display:block; padding:16px; border-bottom:1px solid var(--gray-200); transition:var(--transition); }
.msg-list a:hover { background:var(--gray-100); }
.msg-list a.unread { border-left:3px solid var(--black); }
.msg-subject { font-weight:600; margin-bottom:4px; }
.msg-preview { font-size:.85rem; color:var(--gray-600); }

/* Responsive */
@media (max-width:900px) {
    .stats-grid { grid-template-columns:repeat(2,1fr); }
    .story-grid { grid-template-columns:1fr; }
    .footer-grid { grid-template-columns:1fr 1fr; }
    .admin-layout { grid-template-columns:1fr; }
    .admin-sidebar { display:none; }
    .form-row { grid-template-columns:1fr; }
}
@media (max-width:640px) {
    .nav { display:none; position:absolute; top:64px; left:0; right:0; background:var(--white); flex-direction:column; padding:20px; border-bottom:1px solid var(--gray-200); gap:12px; z-index:999; }
    .nav.open { display:flex; }
    .menu-toggle { display:flex; }
    .stats-grid { grid-template-columns:1fr 1fr; }
    .footer-grid { grid-template-columns:1fr; }
    .hero-btns { flex-direction:column; }
    .hero-btns .btn { width:100%; }
}