:root {
  --bg: #0f1419;
  --card: #1a2332;
  --border: #2a3a4f;
  --text: #e8eef5;
  --muted: #8fa3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --danger: #ef4444;
  --ok: #22c55e;
  --warn: #f59e0b;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.hidden { display: none !important; }
.muted { color: var(--muted); }
.error { color: var(--danger); }
.msg { margin-top: 12px; min-height: 1.2em; }

.screen { min-height: 100vh; }
.login-card {
  max-width: 380px;
  margin: 12vh auto;
  text-align: center;
}
.login-card input { width: 100%; margin: 16px 0; }

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--card);
  flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 1.1rem; }
.tabs { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.tab {
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
}
.tab.active, .tab:hover { background: #243044; color: var(--text); }

.content { padding: 20px; max-width: 1100px; margin: 0 auto; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}
.card h2 { margin: 0 0 16px; font-size: 1.1rem; }

.btn {
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  cursor: pointer;
  font-weight: 600;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); }
.btn.ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn.danger { background: var(--danger); color: #fff; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

input, select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #111827;
  color: var(--text);
  margin-top: 6px;
}
label { display: block; font-size: 0.9rem; color: var(--muted); }
label.checkbox { display: flex; align-items: center; gap: 8px; }
label.checkbox input { width: auto; margin: 0; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.grid.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}
.stat .label { color: var(--muted); font-size: 0.85rem; }
.stat .value { font-size: 1.4rem; font-weight: 700; margin-top: 4px; }

.row-between { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }

.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); }
.table th { color: var(--muted); font-weight: 500; }

.logs {
  max-height: 280px;
  overflow: auto;
  font-family: ui-monospace, monospace;
  font-size: 0.82rem;
  background: #111827;
  border-radius: 8px;
  padding: 12px;
  margin-top: 12px;
}
.log-line { margin: 4px 0; }
.log-line.error { color: #fca5a5; }
.log-line.warn { color: #fcd34d; }
.log-line.info { color: #93c5fd; }

.bar-wrap {
  background: #111827;
  border-radius: 6px;
  height: 8px;
  min-width: 80px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #60a5fa);
  border-radius: 6px;
}
.badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 999px;
  margin-left: 6px;
}
.badge.hot { background: #7f1d1d; color: #fecaca; }
.badge.cool { background: #14532d; color: #bbf7d0; }
.badge.off { background: #374151; color: #9ca3af; }

.code-block {
  background: #111827;
  padding: 12px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 0.8rem;
  word-break: break-all;
  white-space: pre-wrap;
}

.node-row {
  display: grid;
  grid-template-columns: 1fr 1.5fr 80px 100px 80px auto;
  gap: 8px;
  margin-bottom: 8px;
  align-items: end;
}
.ftp-domain-input {
  min-width: 160px;
  margin-top: 0;
  margin-right: 6px;
  display: inline-block;
  width: auto;
  flex: 1;
}
.card.nested { margin-top: 12px; padding: 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; }
.mirror-row, .mirror-edit-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: end; margin-bottom: 8px; }
.mirror-edit-row select, .mirror-edit-row input, .mirror-row select, .mirror-row input { min-width: 160px; }
.mirrors-cell { display: flex; flex-direction: column; gap: 6px; min-width: 280px; }