:root {
    --primary: #0b3268;
    --accent: #ef7822;
    --light: #f5f7fb;
    --dark: #1d2433;
    --muted: #667085;
    --border: #e5e7eb;
    --success: #087443;
    --danger: #b42318;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--light);
    color: var(--dark);
    line-height: 1.5;
}

.container {
    width: min(1120px, 92%);
    margin: auto;
}

.topbar {
    background: #fff;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 20;
}

.nav {
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand {
    font-size: 22px;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
}

nav a {
    margin-left: 16px;
    color: var(--dark);
    text-decoration: none;
    font-weight: 600;
}

.page { padding: 28px 0 60px; }

.hero {
    background: linear-gradient(120deg, var(--primary), #164e91);
    color: white;
    padding: 48px;
    border-radius: 22px;
    margin-bottom: 28px;
}

.hero h1 { font-size: clamp(30px, 5vw, 52px); margin: 0 0 10px; }
.hero p { max-width: 720px; font-size: 18px; }

.grid {
    display: grid;
    gap: 18px;
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 22px;
    box-shadow: 0 10px 28px rgba(16,24,40,.06);
}

.video-card h3 { margin-top: 0; }
.meta { color: var(--muted); font-size: 14px; margin: 8px 0; }

.btn, button {
    display: inline-block;
    background: var(--accent);
    color: #fff !important;
    border: 0;
    padding: 11px 16px;
    border-radius: 10px;
    text-decoration: none;
    cursor: pointer;
    font-weight: 700;
}

.btn.secondary { background: var(--primary); }
.btn.light { background: #eef2ff; color: var(--primary) !important; }
.btn.danger { background: var(--danger); }
.btn.small { padding: 8px 12px; font-size: 14px; }

.form {
    max-width: 780px;
}

label {
    display: block;
    font-weight: 700;
    margin: 14px 0 6px;
}

input, select, textarea {
    width: 100%;
    padding: 12px 13px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: #fff;
    font: inherit;
}

textarea { min-height: 130px; }

.alert {
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 18px;
    background: #fff;
    border: 1px solid var(--border);
}

.alert.success { color: var(--success); border-color: #abefc6; background: #ecfdf3; }
.alert.error { color: var(--danger); border-color: #fecdca; background: #fef3f2; }

.table-wrap { overflow-x: auto; }
table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}
th, td {
    border-bottom: 1px solid var(--border);
    padding: 12px;
    text-align: left;
    vertical-align: top;
}
th { background: #f9fafb; }

.badge {
    display: inline-block;
    padding: 4px 9px;
    border-radius: 999px;
    background: #eef2ff;
    color: var(--primary);
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.player-box {
    background: #000;
    border-radius: 18px;
    overflow: hidden;
    margin-bottom: 18px;
    aspect-ratio: 16 / 9;
}

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

.progress-wrap {
    background: #e5e7eb;
    border-radius: 999px;
    overflow: hidden;
    height: 16px;
}

.progress-bar {
    height: 16px;
    background: var(--accent);
    width: 0%;
    transition: width .3s ease;
}

.codebox {
    background: #101828;
    color: #fff;
    padding: 14px;
    border-radius: 12px;
    overflow-x: auto;
    font-family: Consolas, monospace;
    font-size: 13px;
}

.footer {
    background: #fff;
    border-top: 1px solid var(--border);
    padding: 20px 0;
    color: var(--muted);
}

@media(max-width: 700px) {
    .nav {
        align-items: flex-start;
        flex-direction: column;
        padding: 14px 0;
    }
    nav a { display: inline-block; margin: 6px 10px 6px 0; }
    .hero { padding: 28px; }
}