:root {
    --bg: #090907;
    --bg2: #17130a;
    --card: rgba(255,255,255,.065);
    --card2: rgba(255,255,255,.035);
    --border: rgba(255,255,255,.12);
    --text: #f8fafc;
    --muted: #a1a1aa;
    --gold: #d4af37;
    --gold2: #f7d774;
    --shadow: 0 28px 80px rgba(0,0,0,.36);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Tahoma, Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 78% 0%, rgba(212,175,55,.20), transparent 30%),
        radial-gradient(circle at 8% 20%, rgba(247,215,116,.10), transparent 28%),
        linear-gradient(180deg, var(--bg), var(--bg2) 58%, #050505);
    min-height: 100vh;
    line-height: 1.85;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: min(1220px, 92%);
    margin: 0 auto;
}

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(5,5,5,.78);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(16px);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 0;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 900;
}

.brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 15px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--gold2), var(--gold));
    color: #1f1603;
    box-shadow: 0 14px 40px rgba(212,175,55,.24);
}

.menu {
    display: flex;
    gap: 16px;
    color: var(--muted);
    font-size: 14px;
}

.menu a:hover {
    color: var(--gold2);
}

.hero {
    padding: 72px 0 42px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 30px;
    align-items: center;
}

.badge {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 7px 15px;
    border-radius: 999px;
    border: 1px solid rgba(212,175,55,.35);
    color: #fde68a;
    background: rgba(212,175,55,.10);
    font-size: 13px;
    margin-bottom: 16px;
}

h1 {
    margin: 0;
    font-size: clamp(30px, 5vw, 56px);
    line-height: 1.32;
    letter-spacing: -1px;
}

h2, h3 {
    color: #fff;
}

.hero-text p,
.page-hero p,
.section-head p,
.video-body p,
.info-panel p,
.learning-grid span {
    color: var(--muted);
}

.actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 24px;
}

.btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    padding: 12px 18px;
    border-radius: 15px;
    border: 1px solid var(--border);
    transition: .18s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn.primary {
    background: linear-gradient(135deg, var(--gold2), var(--gold));
    color: #1f1603;
    font-weight: 900;
}

.video-preview,
.video-card,
.info-panel {
    border: 1px solid var(--border);
    background: linear-gradient(180deg, var(--card), var(--card2));
    border-radius: 28px;
    box-shadow: var(--shadow);
}

.video-preview {
    min-height: 330px;
    padding: 28px;
    display: grid;
    place-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.video-preview::before {
    content: "";
    position: absolute;
    width: 230px;
    height: 230px;
    border-radius: 999px;
    background: rgba(212,175,55,.14);
    left: -80px;
    top: -90px;
}

.play-circle {
    width: 76px;
    height: 76px;
    display: grid;
    place-items: center;
    border-radius: 999px;
    margin: 0 auto 18px;
    background: linear-gradient(135deg, var(--gold2), var(--gold));
    color: #1f1603;
    font-size: 26px;
    box-shadow: 0 20px 60px rgba(212,175,55,.28);
}

.stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0,1fr));
    gap: 16px;
    margin: 24px 0 42px;
}

.stats article {
    border: 1px solid var(--border);
    background: rgba(255,255,255,.045);
    border-radius: 22px;
    padding: 18px;
}

.stats strong {
    display: block;
    color: var(--gold2);
    font-size: 17px;
}

.stats span {
    display: block;
    color: var(--muted);
    font-size: 13px;
}

.page-hero {
    padding: 52px 0 26px;
    text-align: center;
}

.page-hero p {
    max-width: 820px;
    margin: 12px auto 0;
}

.toolbar {
    display: grid;
    grid-template-columns: 1.4fr .8fr .8fr;
    gap: 12px;
    position: sticky;
    top: 66px;
    z-index: 50;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 24px;
    background: rgba(5,5,5,.76);
    backdrop-filter: blur(14px);
    margin: 18px 0 24px;
}

input, select {
    width: 100%;
    border: 1px solid var(--border);
    background: rgba(9,9,7,.78);
    color: var(--text);
    border-radius: 14px;
    padding: 12px 14px;
    font-family: inherit;
    outline: none;
}

input:focus, select:focus {
    border-color: rgba(212,175,55,.56);
}

.section-head {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: end;
    margin-bottom: 16px;
}

.counter {
    white-space: nowrap;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 7px 12px;
    color: var(--muted);
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0,1fr));
    gap: 20px;
}

.video-card {
    overflow: hidden;
}

.video-frame {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #000;
}

.video-frame iframe {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

.video-body {
    padding: 18px;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    color: #fde68a;
    font-size: 12px;
    margin-bottom: 8px;
}

.video-body h3 {
    margin: 0 0 8px;
    font-size: 18px;
    line-height: 1.6;
}

.video-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-top: 14px;
}

.duration {
    color: #fde68a;
    background: rgba(212,175,55,.10);
    border: 1px solid rgba(212,175,55,.22);
    border-radius: 999px;
    padding: 4px 10px;
    font-size: 12px;
}

.text-link {
    display: inline-flex;
    color: var(--gold2);
    font-size: 13px;
}

.info-panel {
    margin: 34px 0;
    padding: 24px;
}

.learning-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0,1fr));
    gap: 14px;
    margin-top: 18px;
}

.learning-grid article {
    border: 1px solid var(--border);
    background: rgba(255,255,255,.04);
    border-radius: 20px;
    padding: 16px;
}

.learning-grid strong {
    display: block;
    color: var(--gold2);
    margin-bottom: 7px;
}

.learning-grid span {
    display: block;
    font-size: 13px;
}

.hidden {
    display: none !important;
}

.footer {
    margin-top: 42px;
    padding: 28px 0 40px;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--muted);
    font-size: 13px;
}

@media (max-width: 1100px) {
    .video-grid {
        grid-template-columns: repeat(2, minmax(0,1fr));
    }

    .learning-grid,
    .stats {
        grid-template-columns: repeat(2, minmax(0,1fr));
    }
}

@media (max-width: 780px) {
    .header {
        position: static;
    }

    .nav,
    .section-head {
        display: block;
        text-align: center;
    }

    .brand,
    .menu {
        justify-content: center;
    }

    .menu {
        margin-top: 12px;
        flex-wrap: wrap;
    }

    .hero {
        padding-top: 38px;
        text-align: center;
    }

    .hero-grid,
    .toolbar,
    .video-grid,
    .learning-grid,
    .stats {
        grid-template-columns: 1fr;
    }

    .toolbar {
        position: static;
    }

    .video-actions {
        display: block;
    }

    .text-link {
        margin-top: 10px;
    }
}