:root {
  --bg0: #0f1419;
  --bg1: #171e26;
  --bg2: #1e2732;
  --line: #2c3847;
  --text: #e8eef5;
  --muted: #93a1b3;
  --accent: #3d9cfd;
  --ok: #2fbf71;
  --warn: #e3b341;
  --crit: #e35d6a;
  --unk: #7d8b9c;
  --font: "IBM Plex Sans", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, #1a3048 0%, transparent 55%),
    radial-gradient(900px 500px at 90% 0%, #1b2a22 0%, transparent 50%),
    linear-gradient(180deg, #0c1117, var(--bg0));
}

.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.mono { font-family: var(--mono); }
.error { color: var(--crit); margin-top: 0.75rem; }
.eyebrow { letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); font-size: 0.75rem; margin: 0 0 0.5rem; }

.login-panel {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}
.login-card {
  width: min(420px, 100%);
  background: color-mix(in srgb, var(--bg1) 92%, transparent);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.75rem;
  backdrop-filter: blur(8px);
}
.login-card h1 { margin: 0 0 0.4rem; font-size: 1.6rem; }
.login-card label { display: grid; gap: 0.35rem; margin: 0.85rem 0; font-size: 0.9rem; color: var(--muted); }
.login-card input, .inline-form input, .inline-form select {
  background: var(--bg0);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  padding: 0.65rem 0.75rem;
  font: inherit;
}
button {
  background: var(--accent);
  color: #041018;
  border: 0;
  border-radius: 8px;
  padding: 0.7rem 1rem;
  font-weight: 650;
  cursor: pointer;
}
button.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
}
button:hover { filter: brightness(1.08); }

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg1) 80%, transparent);
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  z-index: 5;
}
.brand { font-weight: 700; letter-spacing: 0.02em; }
.sub { color: var(--muted); font-size: 0.85rem; }
.top-meta { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }

.pill {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.25rem 0.7rem;
  font-size: 0.78rem;
  background: var(--bg2);
}
.pill.ok { border-color: color-mix(in srgb, var(--ok) 50%, var(--line)); color: var(--ok); }
.pill.warn { border-color: color-mix(in srgb, var(--warn) 50%, var(--line)); color: var(--warn); }
.pill.crit { border-color: color-mix(in srgb, var(--crit) 50%, var(--line)); color: var(--crit); }

.tiles, .kpis, .grid {
  padding: 1rem 1.25rem;
  display: grid;
  gap: 0.75rem;
}
.tiles { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.kpis { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.tile, .kpi, .card {
  background: color-mix(in srgb, var(--bg1) 90%, transparent);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.9rem 1rem;
}
.tile h3, .kpi .label, .card h2 {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.tile .state { margin-top: 0.45rem; font-size: 1.15rem; font-weight: 700; }
.tile .detail { margin-top: 0.25rem; color: var(--muted); font-size: 0.8rem; word-break: break-word; }
.state-Healthy { color: var(--ok); }
.state-Fresh { color: var(--ok); }
.state-Warning { color: var(--warn); }
.state-Stale { color: var(--warn); }
.state-Critical { color: var(--crit); }
.state-Unknown { color: var(--unk); }

.kpi .value { margin-top: 0.45rem; font-size: 1.45rem; font-weight: 700; }
.kpi .note { margin-top: 0.3rem; color: var(--warn); font-size: 0.78rem; min-height: 1.1em; }

.card h2 { margin-bottom: 0.75rem; }
.block {
  background: var(--bg0);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.75rem;
  overflow: auto;
  max-height: 260px;
  font-size: 0.8rem;
  white-space: pre-wrap;
}
.list { margin: 0; padding-left: 1.1rem; color: var(--muted); }
.list li { margin: 0.4rem 0; }
.inline-form { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.75rem; }
#users-panel, #diagnostics-panel { margin: 0 1.25rem 1.5rem; }

@media (max-width: 980px) {
  .tiles, .kpis, .grid, .grid.two { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .tiles, .kpis, .grid, .grid.two { grid-template-columns: 1fr; }
  .topbar { align-items: flex-start; flex-direction: column; }
}