:root {
  color-scheme: light;
  --surface-1: #fcfcfb;
  --page: #f9f9f7;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --gridline: #e1e0d9;
  --border: rgba(11, 11, 11, 0.10);
  --series-1: #2a78d6;
  --good: #0ca30c;
  --warning: #fab219;
  --serious: #ec835a;
  --critical: #d03b3b;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --surface-1: #1a1a19;
    --page: #0d0d0d;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --gridline: #2c2c2a;
    --border: rgba(255, 255, 255, 0.10);
    --series-1: #3987e5;
    --good: #0ca30c;
    --warning: #fab219;
    --serious: #ec835a;
    --critical: #e66767;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-1: #1a1a19;
  --page: #0d0d0d;
  --text-primary: #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted: #898781;
  --gridline: #2c2c2a;
  --border: rgba(255, 255, 255, 0.10);
  --series-1: #3987e5;
  --good: #0ca30c;
  --warning: #fab219;
  --serious: #ec835a;
  --critical: #e66767;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page);
  background-image: radial-gradient(circle at 50% -10%, color-mix(in srgb, var(--series-1) 7%, transparent), transparent 60%);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
}

a { color: var(--series-1); }

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-1) 85%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.topbar h1 {
  font-size: 15px;
  margin: 0;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.brand { display: flex; align-items: center; gap: 9px; }
.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gridline);
  flex-shrink: 0;
  transition: background-color 0.3s ease;
}

.topbar nav { display: flex; gap: 16px; align-items: center; }
.topbar nav a, .topbar nav button {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}
.topbar nav a:hover, .topbar nav button:hover { color: var(--text-primary); }

main { padding: 16px; max-width: 1100px; margin: 0 auto; }

.cluster-section { margin-bottom: 26px; }

/* The header is visually fused to the rack below it (shared edges, no gap)
   so the two read as one cabinet: a top nameplate over the unit bays. */
.cluster-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  background: linear-gradient(180deg, #2b2a27 0%, #201f1d 100%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: none;
  border-radius: 12px 12px 0 0;
}
.cluster-header h2 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: #dbd9cf;
  margin: 0;
  font-weight: 700;
  white-space: nowrap;
}
.cluster-line { flex: 1; height: 1px; background: rgba(255, 255, 255, 0.08); }
.cluster-count { font-size: 10px; color: #8f8d85; white-space: nowrap; }

.rack {
  background: #0d0d0c;
  border-radius: 0 0 12px 12px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border: 1px solid var(--border);
  border-top: none;
  box-shadow: 0 12px 28px -16px rgba(0, 0, 0, 0.45);
}

.rack-unit {
  --rack-text: #eeece4;
  --rack-text-muted: #94928a;
  background: linear-gradient(180deg, #242321 0%, #1a1918 100%);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 8px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 1px 2px rgba(0, 0, 0, 0.35);
  transition: opacity 0.2s ease, transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.rack-unit:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.07), 0 6px 16px -4px rgba(0, 0, 0, 0.5);
}
.rack-unit--error { opacity: 0.8; }

.rack-head { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

.rack-led {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 5px 1px currentColor;
}
.rack-led.status-good { color: var(--good); }
.rack-led.status-warning { color: var(--warning); }
.rack-led.status-serious { color: var(--serious); }
.rack-led.status-critical { color: var(--critical); animation: rack-blink 1.1s infinite; }
@keyframes rack-blink { 50% { opacity: 0.3; } }

.rack-name {
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 13px;
  font-weight: 600;
  color: var(--rack-text);
  min-width: 84px;
  flex-shrink: 0;
}

.rack-offline {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--critical);
  border: 1px solid var(--critical);
  border-radius: 4px;
  padding: 1px 6px;
  flex-shrink: 0;
}
.rack-error-text {
  font-size: 12px;
  color: var(--rack-text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rack-metrics { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }

.rack-foot { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-left: auto; }

.meter { display: flex; align-items: center; gap: 6px; }
.meter-label {
  font-size: 9px;
  font-weight: 700;
  color: var(--rack-text-muted);
  letter-spacing: 0.05em;
  width: 26px;
  flex-shrink: 0;
}
.meter-bar { width: 54px; height: 6px; flex-shrink: 0; }
.meter-bar .meter-track { fill: rgba(255, 255, 255, 0.10); }
.meter-bar .meter-fill.status-good { fill: var(--good); }
.meter-bar .meter-fill.status-warning { fill: var(--warning); }
.meter-bar .meter-fill.status-serious { fill: var(--serious); }
.meter-bar .meter-fill.status-critical { fill: var(--critical); }
.meter-value {
  font-size: 11px;
  color: var(--rack-text);
  font-variant-numeric: tabular-nums;
  width: 30px;
  flex-shrink: 0;
}

.rack-badges { display: flex; gap: 8px; flex-wrap: wrap; }
.rack-badge {
  font-size: 10px;
  color: var(--rack-text-muted);
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  padding: 3px 7px;
  white-space: nowrap;
}
.rack-badge--good { color: var(--good); background: color-mix(in srgb, var(--good) 16%, transparent); }
.rack-badge--warning { color: var(--warning); background: color-mix(in srgb, var(--warning) 22%, transparent); }
.rack-badge--serious { color: var(--serious); background: color-mix(in srgb, var(--serious) 18%, transparent); }
.rack-badge--critical { color: var(--critical); background: color-mix(in srgb, var(--critical) 18%, transparent); }

.rack-refresh-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--rack-text-muted);
  border-radius: 4px;
  width: 26px;
  height: 26px;
  cursor: pointer;
  font-size: 13px;
  flex-shrink: 0;
}
.rack-refresh-btn:hover { color: var(--rack-text); background: rgba(255, 255, 255, 0.12); }

.uptime-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.uptime-pct {
  font-size: 10px;
  color: var(--rack-text-muted);
  font-variant-numeric: tabular-nums;
  width: 44px;
  flex-shrink: 0;
  text-align: right;
}
.uptime-bars {
  display: flex;
  gap: 1px;
  width: 70px;
  flex-shrink: 0;
  height: 8px;
}
.uptime-bar {
  flex: 1;
  min-width: 1px;
  border-radius: 1px;
  background: rgba(255, 255, 255, 0.08);
}
.uptime-bar.status-good { background: var(--good); }
.uptime-bar.status-critical { background: var(--critical); }
.uptime-bar.status-empty { background: rgba(255, 255, 255, 0.07); }

/* Phones: each rack unit becomes a stacked mini-card (head / metrics / foot
   as three full-width rows) instead of squeezing everything into one line
   that wraps unpredictably. */
@media (max-width: 640px) {
  .topbar { padding: 10px 14px; }
  .topbar h1 { font-size: 13px; }
  main { padding: 10px; }

  .cluster-header { padding: 8px 12px; }
  .rack { padding: 6px; gap: 6px; }

  .rack-unit {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 12px;
  }
  .rack-metrics { justify-content: space-between; row-gap: 8px; }
  .rack-foot { margin-left: 0; width: 100%; justify-content: space-between; }
  .rack-badges { flex: 1; }

  .login-card { width: auto; margin: 0 16px; }
}

.site-footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4px 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-muted);
}
.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--text-primary); }

.error-banner {
  background: color-mix(in srgb, var(--critical) 12%, var(--surface-1));
  border: 1px solid var(--critical);
  color: var(--text-primary);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 12px;
}

.status-good { background: var(--good); }
.status-warning { background: var(--warning); }
.status-serious { background: var(--serious); }
.status-critical { background: var(--critical); }

table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--gridline); }
th { color: var(--text-muted); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: 0.02em; }

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  margin-bottom: 20px;
}
.card h2 { font-size: 15px; margin: 0 0 14px; }

label { display: block; font-size: 13px; color: var(--text-secondary); margin-bottom: 4px; margin-top: 12px; }
input[type="text"], input[type="password"], input[type="number"] {
  width: 100%;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--gridline);
  background: var(--page);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
}
input:focus { outline: 2px solid var(--series-1); outline-offset: 1px; }

.btn {
  background: var(--series-1);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 14px;
  cursor: pointer;
  margin-top: 14px;
}
.btn:hover { filter: brightness(1.08); }
.btn.secondary { background: none; color: var(--text-primary); border: 1px solid var(--gridline); }
.btn.danger { background: var(--critical); }
.btn-block { width: 100%; }

.form-msg { font-size: 13px; margin-top: 10px; }
.form-msg.err { color: var(--critical); }
.form-msg.ok { color: var(--good); }

.token-box {
  font-family: ui-monospace, monospace;
  background: var(--page);
  border: 1px solid var(--gridline);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 13px;
  word-break: break-all;
}

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-card {
  width: 320px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 26px;
}
.login-card h1 { font-size: 17px; margin: 0 0 4px; }
.login-card p.sub { color: var(--text-muted); font-size: 13px; margin: 0 0 18px; }

.muted { color: var(--text-muted); }
.empty-state { color: var(--text-muted); font-size: 14px; padding: 30px 0; text-align: center; }