:root {
    color-scheme: dark;
    --bg: #0b1220;
    --card: #121b2f;
    --border: #23304b;
    --text: #e6edf7;
    --muted: #97a6c0;
    --accent: #46a0ff;
    --success: #0f8a5f;
    --error: #912f45;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 14px/1.5 Arial, sans-serif;
}
.container { max-width: 1240px; margin: 0 auto; padding: 24px; }
.page-header {
    display: flex; justify-content: space-between; gap: 24px; align-items: center;
    margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--border);
}
.page-header h1 { margin: 0 0 6px; font-size: 28px; }
.page-header p { margin: 0; color: var(--muted); }
.page-header nav { display: flex; gap: 12px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.grid { display: grid; gap: 24px; }
.cols-2 { grid-template-columns: 2fr 1fr; }
.card {
    background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 20px;
}
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
label { display: flex; flex-direction: column; gap: 8px; font-weight: 600; }
input, select, button {
    width: 100%; border-radius: 10px; border: 1px solid var(--border); background: #0f1728;
    color: var(--text); padding: 12px 14px;
}
button {
    background: var(--accent); color: #07111f; border: 0; font-weight: 700; cursor: pointer;
}
button:hover { filter: brightness(1.05); }
.actions { display: flex; justify-content: flex-end; }
.span-2 { grid-column: span 2; }
.alert { border-radius: 12px; padding: 14px 16px; margin-bottom: 16px; }
.alert.success { background: rgba(15,138,95,.15); border: 1px solid rgba(15,138,95,.6); }
.alert.error { background: rgba(145,47,69,.15); border: 1px solid rgba(145,47,69,.6); }
.alert ul { margin: 8px 0 0 16px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px; border-bottom: 1px solid var(--border); text-align: left; white-space: nowrap; }
th { color: var(--muted); font-size: 12px; text-transform: uppercase; }
.mt-24 { margin-top: 24px; }
code { background: #0b1323; padding: 3px 6px; border-radius: 8px; }
@media (max-width: 980px) {
    .cols-2, .form-grid { grid-template-columns: 1fr; }
    .span-2 { grid-column: span 1; }
    .page-header { flex-direction: column; align-items: flex-start; }
}