:root { color-scheme: light dark; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  font-family: -apple-system, system-ui, sans-serif;
  margin: 0;
  background: #f4f5f7;
  color: #1a1a1a;
}
@media (prefers-color-scheme: dark) {
  body { background: #15161a; color: #e8e8ea; }
  .card, .login-card { background: #1f2125 !important; border-color: #2d2f34 !important; }
  .topbar { background: #1a1b1e !important; border-color: #2d2f34 !important; }
  button { background: #2d2f34 !important; color: #e8e8ea !important; border-color: #3a3c42 !important; }
  button.primary { background: #2563eb !important; color: #fff !important; }
  input { background: #1f2125 !important; color: #e8e8ea !important; border-color: #3a3c42 !important; }
  .tab.active { background: #2563eb !important; color: #fff !important; }
  .pill-off { background: #3a2222 !important; color: #ff8080 !important; }
  .pill-on { background: #1d3a24 !important; color: #5ee07c !important; }
}

.login-screen { display: flex; align-items: center; justify-content: center; height: 100vh; }
.login-card { display: flex; flex-direction: column; gap: 10px; background: #fff; border: 1px solid #e2e4e8;
              border-radius: 12px; padding: 28px; width: 280px; }
.login-card h1 { font-size: 18px; margin: 0 0 8px; }
.login-card input { padding: 10px; border-radius: 8px; border: 1px solid #d8dadf; font-size: 14px; }
.login-card button { padding: 10px; border-radius: 8px; border: none; background: #2563eb; color: #fff; cursor: pointer; }
.error-text { color: #c0392b; font-size: 13px; min-height: 16px; margin: 0; }

.topbar { display: flex; align-items: center; gap: 20px; padding: 12px 20px; background: #fff;
          border-bottom: 1px solid #e2e4e8; flex-wrap: wrap; }
.topbar h1 { font-size: 16px; margin: 0; white-space: nowrap; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; flex: 1; }
.tab { border: 1px solid #d8dadf; background: #fff; border-radius: 8px; padding: 6px 12px; font-size: 13px; cursor: pointer; }
.tab.active { background: #2563eb; color: #fff; border-color: #2563eb; }
.topbar-right { display: flex; align-items: center; gap: 10px; font-size: 13px; }
.topbar-right button { border: 1px solid #d8dadf; background: #fff; border-radius: 8px; padding: 6px 10px; cursor: pointer; }

main { padding: 20px; }
.panel { display: none; }
.panel.active { display: block; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 16px; }
.card { background: #fff; border: 1px solid #e2e4e8; border-radius: 12px; padding: 18px; }
.card h2 { margin: 0 0 10px; font-size: 15px; display: flex; align-items: center; gap: 8px; }

.pill { font-size: 11px; padding: 2px 8px; border-radius: 999px; font-weight: 600; }
.pill-on { background: #e4f8e8; color: #1c8a3c; }
.pill-off { background: #fde8e8; color: #c0392b; }

.metrics { display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px; margin: 10px 0; font-size: 12px; }
.metrics div { background: rgba(0,0,0,0.04); border-radius: 8px; padding: 6px 8px; }
.metrics b { display: block; font-size: 14px; }

.actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
button { border: 1px solid #d8dadf; background: #fff; border-radius: 8px; padding: 6px 10px; font-size: 12px; cursor: pointer; }
button.primary { background: #2563eb; color: #fff; border-color: #2563eb; }
button.danger { background: #dc2626; color: #fff; border-color: #dc2626; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

table { width: 100%; border-collapse: collapse; font-size: 12px; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid #e2e4e8; }

.alert-row { display: flex; justify-content: space-between; align-items: center; padding: 10px; border-radius: 8px;
             background: rgba(0,0,0,0.04); margin-bottom: 8px; }
.sev-info { border-left: 4px solid #2563eb; }
.sev-warning { border-left: 4px solid #d97706; }
.sev-critical { border-left: 4px solid #dc2626; }

.muted { color: #888; font-size: 12px; }