:root {
    --bg: #f4f7fb;
    --card: #ffffff;
    --text: #172033;
    --muted: #687189;
    --primary: #0a63ff;
    --primary-dark: #0049c6;
    --border: #e4e9f2;
    --success: #157f3b;
    --danger: #c62828;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
}

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

.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}

.topbar {
    background: #0b1733;
    color: white;
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: 0 4px 18px rgba(0,0,0,.12);
}

.topbar-inner {
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: var(--primary);
    font-weight: 800;
}

.brand small {
    display: block;
    color: #b8c4dc;
    margin-top: 2px;
}

.nav {
    display: flex;
    gap: 18px;
    align-items: center;
    font-size: 14px;
}

.hero {
    padding: 64px 0 42px;
    background: linear-gradient(135deg, #0b1733, #14376d);
    color: white;
}

.hero h1 {
    font-size: clamp(32px, 6vw, 54px);
    margin: 0 0 14px;
    max-width: 760px;
}

.hero p {
    color: #d6def0;
    max-width: 720px;
    font-size: 18px;
    line-height: 1.6;
}

.search-box {
    margin-top: 26px;
    background: white;
    border-radius: 16px;
    padding: 10px;
    display: flex;
    gap: 10px;
    max-width: 760px;
}

.search-box input {
    flex: 1;
    border: 0;
    padding: 14px 16px;
    font-size: 16px;
    outline: none;
}

.btn {
    border: 0;
    border-radius: 10px;
    padding: 12px 18px;
    background: var(--primary);
    color: white;
    font-weight: 700;
    cursor: pointer;
}

.btn:hover { background: var(--primary-dark); }

.btn.secondary {
    background: #eef3ff;
    color: var(--primary-dark);
}

.btn.danger {
    background: var(--danger);
}

.section {
    padding: 42px 0;
}

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

.grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0,1fr));
    gap: 18px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 6px 22px rgba(24, 45, 84, .05);
}

.card h3 {
    margin: 0 0 10px;
}

.card p {
    color: var(--muted);
    line-height: 1.55;
}

.meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.badge {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 6px 10px;
    background: #eef3ff;
    color: #184d9c;
    font-size: 12px;
    font-weight: 700;
}

.article {
    background: white;
    border-radius: 18px;
    padding: 26px;
    border: 1px solid var(--border);
    margin: 28px 0;
}

.article h1 {
    margin-top: 0;
}

.article-body {
    line-height: 1.75;
    color: #30394d;
    white-space: pre-wrap;
}

.video-wrap {
    position: relative;
    padding-top: 56.25%;
    border-radius: 14px;
    overflow: hidden;
    background: #10131a;
    margin: 20px 0;
}

.video-wrap iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.form-card {
    max-width: 760px;
    margin: 30px auto;
    background: white;
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 24px;
}

.form-grid {
    display: grid;
    gap: 16px;
}

label {
    display: grid;
    gap: 7px;
    font-weight: 700;
    font-size: 14px;
}

input, select, textarea {
    width: 100%;
    padding: 12px 13px;
    border: 1px solid #ccd4e2;
    border-radius: 10px;
    font: inherit;
}

textarea { min-height: 150px; resize: vertical; }

.alert {
    padding: 12px 14px;
    border-radius: 10px;
    margin: 12px 0;
}

.alert.success { background: #eaf8ef; color: var(--success); }
.alert.error { background: #fdeaea; color: var(--danger); }

.table-wrap {
    overflow-x: auto;
    background: white;
    border: 1px solid var(--border);
    border-radius: 14px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 13px 14px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

th {
    background: #f6f8fc;
    font-size: 13px;
}

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

.admin-nav {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin: 24px 0;
}

.footer {
    padding: 26px 0;
    color: var(--muted);
    text-align: center;
}

.empty {
    text-align: center;
    padding: 34px;
    color: var(--muted);
}

@media (max-width: 820px) {
    .grid { grid-template-columns: 1fr; }
    .topbar-inner { align-items: flex-start; padding: 14px 0; }
    .nav { flex-wrap: wrap; justify-content: flex-end; }
    .search-box { flex-direction: column; }
}


.video-wrap video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
    background: #000;
}