:root {
  --bg: #080c18;
  --bg-soft: #0f1626;
  --card: rgba(21, 30, 48, 0.85);
  --border: rgba(120, 150, 200, 0.16);
  --text: #e8eefb;
  --muted: #8ea0bf;
  --good: #37d67a;
  --warn: #ffb020;
  --danger: #ff5c5c;
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(1200px 600px at 20% -10%, #16213d 0%, var(--bg) 55%);
  color: var(--text);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 32px 20px 40px;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, #4f7cff, #7b5cff);
  font-weight: 700;
  font-size: 20px;
}

h1 {
  margin: 0;
  font-size: 20px;
  letter-spacing: 0.5px;
}

.sub {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 13px;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  font-size: 13px;
}

.badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
}

.badge[data-state="ok"] .dot { background: var(--good); box-shadow: 0 0 10px var(--good); }
.badge[data-state="degraded"] .dot { background: var(--warn); box-shadow: 0 0 10px var(--warn); }
.badge[data-state="down"] .dot,
.badge[data-state="error"] .dot { background: var(--danger); box-shadow: 0 0 10px var(--danger); }

.updated {
  color: var(--muted);
  font-size: 12px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  backdrop-filter: blur(6px);
}

.card h2 {
  margin: 0 0 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hint-inline {
  font-size: 12px;
  color: var(--muted);
  font-weight: 400;
}

.span-2 { grid-column: span 2; }
.span-4 { grid-column: span 4; }

.metric-xl {
  margin: 0;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0.5px;
  font-variant-numeric: tabular-nums;
}

.hint {
  margin: 8px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.ring {
  --value: 0;
  --ring-color: var(--good);
  width: 116px;
  height: 116px;
  margin: 4px auto 0;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(var(--ring-color) calc(var(--value) * 1%), rgba(120, 150, 200, 0.14) 0);
  transition: background 0.4s ease;
}

.ring[data-level="warn"] { --ring-color: var(--warn); }
.ring[data-level="danger"] { --ring-color: var(--danger); }

.ring > span {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: #101827;
  display: grid;
  place-items: center;
  font-size: 20px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.load-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.load-item {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.load-label {
  font-size: 12px;
  color: var(--muted);
}

.load-item strong {
  font-size: 20px;
  font-variant-numeric: tabular-nums;
}

.mini-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.mini-item {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 10px;
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.mini-item span {
  font-size: 12px;
  color: var(--muted);
}

.mini-item strong {
  font-size: 17px;
  font-variant-numeric: tabular-nums;
}

.disk-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.metric-lg {
  font-size: 26px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.bar {
  margin-top: 12px;
  height: 8px;
  border-radius: 999px;
  background: rgba(120, 150, 200, 0.14);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: var(--good);
  transition: width 0.4s ease;
}

.bar-fill[data-level="warn"] { background: var(--warn); }
.bar-fill[data-level="danger"] { background: var(--danger); }

.conn-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.conn-item {
  display: grid;
  grid-template-columns: 12px 1fr auto auto;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  font-size: 14px;
}

.conn-item::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
}

.conn-item[data-state="up"]::before { background: var(--good); box-shadow: 0 0 8px var(--good); }
.conn-item[data-state="down"]::before { background: var(--danger); box-shadow: 0 0 8px var(--danger); }
.conn-item.loading::before { background: var(--warn); }

.conn-name { font-weight: 600; }

.conn-detail,
.conn-latency {
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.conn-latency {
  min-width: 68px;
  text-align: right;
  color: var(--text);
}

.footer {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}

.beian {
  margin: 0 0 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  align-items: center;
}

.beian a {
  color: var(--muted);
  text-decoration: none;
}

.beian a:hover {
  color: var(--text);
  text-decoration: underline;
}

.beian .sep { color: rgba(120, 150, 200, 0.5); }

.copyright {
  margin: 0;
  font-size: 12px;
}

.offline {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  padding: 10px 18px;
  border-radius: 999px;
  background: rgba(255, 92, 92, 0.16);
  border: 1px solid rgba(255, 92, 92, 0.5);
  color: #ffd9d9;
  font-size: 13px;
}

@media (max-width: 860px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .span-4 { grid-column: span 2; }
}

@media (max-width: 560px) {
  .grid { grid-template-columns: minmax(0, 1fr); }
  .span-2,
  .span-4 { grid-column: span 1; }
  .metric-xl { font-size: 24px; }
  .conn-item { grid-template-columns: 12px 1fr auto; }
  .conn-detail { display: none; }
}