:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #182235;
  background: #f5f7fb;
  font-synthesis: none;
  --green: #16845b;
  --green-soft: #e8f7f0;
  --amber: #b7670e;
  --amber-soft: #fff4dd;
  --red: #c43d47;
  --red-soft: #fdecef;
  --ink-muted: #667189;
  --line: #dfe5ef;
  --card: #ffffff;
  --navy: #263a5a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(55, 107, 173, 0.08), transparent 32rem),
    #f5f7fb;
}

button { font: inherit; }

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 36px;
}

.page-header,
.section-header,
.component-heading,
.chart-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.page-header { margin-bottom: 30px; }

.eyebrow {
  margin: 0 0 8px;
  color: #5c6f8c;
  font-size: 0.73rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 8px; font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.04em; }
h2 { margin-bottom: 0; font-size: 1.35rem; letter-spacing: -0.02em; }
h3 { margin-bottom: 8px; font-size: 1rem; }
.subtitle, .component-card p, .chart-heading p { margin-bottom: 0; color: var(--ink-muted); }

.refresh-button {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px 16px;
  color: var(--navy);
  background: var(--card);
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(34, 54, 83, 0.05);
}

.refresh-button:disabled { opacity: 0.6; cursor: wait; }

.overall-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  min-height: 124px;
  padding: 26px 28px;
  border: 1px solid #b9e1ce;
  border-radius: 20px;
  background: var(--green-soft);
}

.overall-card.is-degraded { border-color: #efd49e; background: var(--amber-soft); }
.overall-card.is-offline { border-color: #efbdc2; background: var(--red-soft); }
.overall-card.is-loading { border-color: var(--line); background: #eef2f8; }

.status-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 8px rgba(22, 132, 91, 0.12);
}

.is-degraded .status-dot { background: var(--amber); box-shadow: 0 0 0 8px rgba(183, 103, 14, 0.12); }
.is-offline .status-dot { background: var(--red); box-shadow: 0 0 0 8px rgba(196, 61, 71, 0.12); }
.is-loading .status-dot { background: #8090a8; box-shadow: 0 0 0 8px rgba(128, 144, 168, 0.12); }

.overall-card h2 { margin-bottom: 6px; }
.overall-card p { margin-bottom: 0; color: #536078; }
.last-check { text-align: right; }
.last-check span { display: block; margin-bottom: 6px; color: var(--ink-muted); font-size: 0.8rem; }

.component-grid, .metric-grid, .detail-grid {
  display: grid;
  gap: 16px;
}

.component-grid { grid-template-columns: repeat(3, 1fr); margin-top: 16px; }
.component-card, .metric-card, .chart-card, .detail-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
  box-shadow: 0 10px 30px rgba(34, 54, 83, 0.045);
}
.component-card { padding: 22px; }
.component-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  color: #365679;
  background: #edf3fa;
  font-size: 0.7rem;
  font-weight: 800;
}
.component-state {
  border-radius: 999px;
  padding: 5px 9px;
  color: var(--ink-muted);
  background: #f0f3f7;
  font-size: 0.75rem;
  font-weight: 700;
}
.component-state.is-ok { color: var(--green); background: var(--green-soft); }
.component-state.is-warning { color: var(--amber); background: var(--amber-soft); }
.component-state.is-error { color: var(--red); background: var(--red-soft); }
.component-card h3 { margin-top: 18px; }

.section-block { margin-top: 42px; }
.range-tabs { display: flex; padding: 4px; border-radius: 12px; background: #e9edf4; }
.range-tab { border: 0; border-radius: 9px; padding: 8px 13px; color: #627089; background: transparent; cursor: pointer; }
.range-tab.is-active { color: #1f3453; background: #fff; box-shadow: 0 2px 9px rgba(38, 58, 90, 0.12); }

.metric-grid { grid-template-columns: repeat(4, 1fr); margin-top: 20px; }
.metric-card { padding: 18px 20px; }
.metric-card span { display: block; margin-bottom: 10px; color: var(--ink-muted); font-size: 0.82rem; }
.metric-card strong { font-size: 1.55rem; letter-spacing: -0.03em; }

.chart-card { position: relative; margin-top: 16px; padding: 22px; }
.chart-heading p { margin: 6px 0 0; font-size: 0.85rem; }
.chart-heading > span { color: var(--ink-muted); font-size: 0.82rem; }
#latencyChart { display: block; width: 100%; margin-top: 24px; }
.empty-state { display: none; margin: 24px 0; color: var(--ink-muted); text-align: center; }
.empty-state.is-visible { display: block; }

.detail-grid { grid-template-columns: 0.85fr 1.15fr; margin-top: 16px; }
.detail-card { padding: 24px; }
.detail-list { margin: 22px 0 0; }
.detail-list > div { display: flex; justify-content: space-between; gap: 20px; padding: 12px 0; border-bottom: 1px solid #edf0f5; }
.detail-list > div:last-child { border-bottom: 0; }
.detail-list dt { color: var(--ink-muted); }
.detail-list dd { margin: 0; font-weight: 700; }

.incident-item { display: grid; grid-template-columns: 12px 1fr auto; gap: 13px; align-items: start; padding: 16px 0; border-bottom: 1px solid #edf0f5; }
.incident-item:last-child { border-bottom: 0; }
.incident-marker { width: 9px; height: 9px; margin-top: 6px; border-radius: 50%; background: var(--red); }
.incident-item h3 { margin-bottom: 4px; }
.incident-item p, .incident-duration { margin: 0; color: var(--ink-muted); font-size: 0.82rem; }

footer { padding: 32px 0 4px; color: #7a8599; font-size: 0.8rem; text-align: center; }

@media (max-width: 820px) {
  .component-grid, .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-grid { grid-template-columns: 1fr; }
  .overall-card { grid-template-columns: auto 1fr; }
  .last-check { grid-column: 2; text-align: left; }
}

@media (max-width: 560px) {
  .shell { width: min(100% - 20px, 1180px); padding-top: 28px; }
  .page-header, .section-header, .chart-heading { align-items: flex-start; flex-direction: column; }
  .component-grid, .metric-grid { grid-template-columns: 1fr; }
  .overall-card { padding: 22px; }
  .range-tabs { width: 100%; }
  .range-tab { flex: 1; }
}