:root {
  --bg: #0f1115;
  --panel: #171a21;
  --border: #262b35;
  --text: #d8dee9;
  --muted: #7d8590;
  --accent: #4f8cff;
  --danger: #e5534b;
  --warn: #d29922;
  --ok: #3fb950;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

/* --- login --- */
.login-screen { display: flex; align-items: center; justify-content: center; height: 100vh; }
.login-card { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 32px; width: 320px; display: flex; flex-direction: column; gap: 12px; }
.login-card h1 { margin: 0 0 8px; font-size: 18px; }
.login-card input { background: #0b0d11; border: 1px solid var(--border); color: var(--text); padding: 10px; border-radius: 6px; font-size: 14px; }
.login-card button { background: var(--accent); border: none; color: white; padding: 10px; border-radius: 6px; cursor: pointer; font-size: 14px; }
.login-card .error { color: var(--danger); font-size: 13px; }

/* --- layout --- */
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; border-bottom: 1px solid var(--border); }
.topbar h1 { font-size: 16px; margin: 0; }
.link-btn { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 13px; }
.tabs { display: flex; gap: 4px; padding: 10px 20px 0; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.tab-btn { background: none; border: none; color: var(--muted); padding: 8px 14px; cursor: pointer; font-size: 13px; border-radius: 6px 6px 0 0; }
.tab-btn.active { color: var(--text); background: var(--panel); }
main { padding: 20px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.panel-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.muted { color: var(--muted); font-size: 12px; }

button { background: var(--panel); border: 1px solid var(--border); color: var(--text); padding: 7px 14px; border-radius: 6px; cursor: pointer; font-size: 13px; }
button:hover { border-color: var(--accent); }
button.danger:hover { border-color: var(--danger); color: var(--danger); }
button.primary { background: var(--accent); border-color: var(--accent); color: white; }

/* --- node cards --- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.node-card { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 14px; }
.node-card.overloaded { border-color: var(--danger); }
.node-card.maintenance { opacity: 0.6; }
.node-card.failed { border-color: var(--warn); }
.node-card h3 { margin: 0 0 8px; font-size: 14px; display: flex; justify-content: space-between; }
.node-card .ip { color: var(--muted); font-size: 12px; }
.node-card dl { display: grid; grid-template-columns: auto 1fr; gap: 2px 8px; margin: 8px 0; font-size: 12px; }
.node-card dt { color: var(--muted); }
.node-card .actions { display: flex; gap: 6px; margin-top: 10px; }
.node-card .chart-wrap { margin-top: 8px; }
.node-chart { width: 100%; height: 50px; display: block; background: #0b0d11; border-radius: 4px; }
.chart-caption { font-size: 11px; color: var(--muted); margin-top: 2px; }

.node-domains { margin-top: 12px; border-top: 1px solid var(--border); padding-top: 10px; }
.node-domains-title { font-size: 11px; color: var(--muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.03em; }

/* --- лента переносов доменов --- */
.migrations-panel { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; margin-bottom: 16px; }
.migrations-panel .node-domains-title { margin-bottom: 8px; }
.migrations-feed { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 5px; max-height: 220px; overflow-y: auto; }
.migrations-feed li { display: flex; align-items: center; gap: 8px; font-size: 12px; padding: 5px 8px; border-radius: 5px; background: #0b0d11; flex-wrap: wrap; }
.migrations-feed .mig-time { color: var(--muted); font-variant-numeric: tabular-nums; min-width: 86px; }
.migrations-feed .mig-domain { font-weight: 600; }
.migrations-feed .mig-route { color: var(--text); white-space: nowrap; }
.migrations-feed .mig-route .arrow { color: var(--muted); margin: 0 3px; }
.migrations-feed .mig-bw { color: var(--muted); margin-left: auto; font-variant-numeric: tabular-nums; }
.migrations-feed .empty { color: var(--muted); padding: 4px 8px; }
.badge.info { background: #1c3a5e; color: #8ab4f8; }
.domain-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; max-height: 140px; overflow-y: auto; }
.domain-list li { display: flex; align-items: center; gap: 6px; font-size: 12px; padding: 4px 6px; border-radius: 4px; background: #0b0d11; }
.domain-list .domain-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.domain-list .domain-bw { color: var(--muted); font-variant-numeric: tabular-nums; }
.domain-list .badge { font-size: 10px; padding: 1px 5px; }
.badge { font-size: 11px; padding: 2px 6px; border-radius: 4px; background: var(--border); }
.badge.danger { background: var(--danger); color: white; }
.badge.warn { background: var(--warn); color: black; }

/* --- tables --- */
.data-table { width: 100%; border-collapse: collapse; background: var(--panel); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.data-table th, .data-table td { padding: 8px 12px; border-bottom: 1px solid var(--border); text-align: left; font-size: 12px; }
.data-table th { color: var(--muted); font-weight: 500; }
.data-table tbody tr:last-child td { border-bottom: none; }

.log-view { background: #0b0d11; border: 1px solid var(--border); border-radius: 8px; padding: 12px; height: 360px; overflow-y: auto; font-size: 11px; white-space: pre-wrap; margin-top: 14px; }

.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.6); display: flex; align-items: center; justify-content: center; }
.modal-overlay.hidden { display: none; }
.modal-box { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 20px; min-width: 320px; max-width: 90vw; max-height: 85vh; overflow-y: auto; }
.modal-box h3 { margin-top: 0; }
.modal-box label { display: block; margin: 10px 0 4px; font-size: 12px; color: var(--muted); }
.modal-box input, .modal-box select { width: 100%; background: #0b0d11; border: 1px solid var(--border); color: var(--text); padding: 8px; border-radius: 6px; }
.modal-box .modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
.modal-box pre { background: #0b0d11; padding: 10px; border-radius: 6px; font-size: 11px; max-height: 200px; overflow-y: auto; }