/* ------------------------------------------------------------------ *
 * Palette: light is the base; dark is a selected set of steps for the
 * dark surface (not an automatic inversion).
 * ------------------------------------------------------------------ */
:root {
  color-scheme: light;

  --page:            #f9f9f7;
  --surface:         #fcfcfb;
  --text-primary:    #0b0b0b;
  --text-secondary:  #52514e;
  --text-muted:      #898781;
  --gridline:        #e1e0d9;
  --baseline:        #c3c2b7;
  --border:          rgba(11, 11, 11, 0.10);
  --hover-wash:      rgba(11, 11, 11, 0.05);

  /* categorical slots, in fixed order */
  --series-1:        #2a78d6;
  --series-2:        #eb6834;
  --series-3:        #1baf7a;

  /* status (fixed in both modes) */
  --good:            #0ca30c;
  --warning:         #fab219;
  --critical:        #d03b3b;

  --radius:          10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;

    --page:            #0d0d0d;
    --surface:         #1a1a19;
    --text-primary:    #ffffff;
    --text-secondary:  #c3c2b7;
    --text-muted:      #898781;
    --gridline:        #2c2c2a;
    --baseline:        #383835;
    --border:          rgba(255, 255, 255, 0.10);
    --hover-wash:      rgba(255, 255, 255, 0.07);

    --series-1:        #3987e5;
    --series-2:        #d95926;
    --series-3:        #199e70;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0 auto;
  padding: 20px 16px 56px;
  max-width: 1180px;
  background: var(--page);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

h1 {
  margin: 0;
  font-size: 21px;
  font-weight: 650;
  letter-spacing: 0.01em;
}

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

/* ---------------- header ---------------- */

.page-head {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 16px;
}

.page-head-sub {
  margin: 2px 0 0;
  color: var(--text-secondary);
  font-size: 13px;
}

.page-head-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.fetched-at {
  color: var(--text-muted);
  font-size: 12px;
}

.btn {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-primary);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}

.btn:hover { background: var(--hover-wash); }
.btn:disabled { opacity: 0.55; cursor: default; }

.banner {
  margin: 0 0 16px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--critical);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text-secondary);
  font-size: 13px;
}

/* ---------------- status strip ---------------- */

.status-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}

.status-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 74px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.status-card-state { flex-direction: row; align-items: center; gap: 10px; }

.status-key {
  margin: 0 0 2px;
  color: var(--text-muted);
  font-size: 12px;
}

.status-value {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
}

.status-note {
  margin: 2px 0 0;
  color: var(--text-secondary);
  font-size: 12px;
}

.state-icon {
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--text-muted);
  position: relative;
}

.state-icon::after {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
}

.state-ok    .state-icon { background: var(--good); }
.state-ok    .state-icon::after { content: "✓"; }
.state-warn  .state-icon { background: var(--warning); }
.state-warn  .state-icon::after { content: "!"; color: #0b0b0b; }
.state-error .state-icon { background: var(--critical); }
.state-error .state-icon::after { content: "×"; }

/* ---------------- filters ---------------- */

.filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.range-group {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
}

.range-btn {
  padding: 6px 16px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}

.range-btn:hover { background: var(--hover-wash); }

.range-btn[aria-pressed="true"] {
  background: var(--series-1);
  color: #ffffff;
  font-weight: 600;
}

.host-filter {
  color: var(--text-secondary);
  font-size: 13px;
}

.host-filter select {
  margin-left: 6px;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text-primary);
  font: inherit;
  font-size: 13px;
}

/* ---------------- stat tiles ---------------- */

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}

.tile {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.tile-key {
  margin: 0;
  color: var(--text-muted);
  font-size: 12px;
}

.tile-value {
  margin: 4px 0 0;
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.tile-unit {
  margin-left: 2px;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 400;
}

.tile-note {
  margin: 2px 0 0;
  color: var(--text-secondary);
  font-size: 12px;
}

.tile-missing .tile-value { color: var(--text-muted); font-size: 17px; }

/* ---------------- charts ---------------- */

.charts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 12px;
}

.chart-card {
  padding: 12px 14px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.chart-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.chart-title {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
}

.chart-latest {
  color: var(--text-secondary);
  font-size: 12px;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 4px;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 12px;
}

.legend-line {
  width: 14px;
  height: 2px;
  border-radius: 1px;
  background: currentColor;
}

.plot {
  position: relative;
  touch-action: pan-y;
}

.plot svg { display: block; }

.plot-overlay {
  position: absolute;
  inset: 0;
  cursor: crosshair;
}

.plot-overlay:focus-visible {
  outline: 2px solid var(--series-1);
  outline-offset: -2px;
  border-radius: 6px;
}

.tooltip {
  position: absolute;
  z-index: 2;
  min-width: 130px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.16);
  font-size: 12px;
  pointer-events: none;
}

.tooltip[hidden] { display: none; }

.tooltip-time {
  margin: 0 0 4px;
  color: var(--text-secondary);
  font-size: 11px;
}

.tooltip-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  white-space: nowrap;
}

.tooltip-key {
  width: 12px;
  height: 2px;
  border-radius: 1px;
  background: currentColor;
  flex: none;
  transform: translateY(-3px);
}

.tooltip-value {
  color: var(--text-primary);
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}

.tooltip-label { color: var(--text-secondary); }

.tooltip-missing { color: var(--text-secondary); }

.chart-note {
  margin: 4px 0 4px;
  color: var(--text-muted);
  font-size: 11px;
}

.is-stale { opacity: 0.55; transition: opacity 0.15s; }

/* ---------------- table view ---------------- */

.table-view {
  margin-top: 18px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.table-view summary {
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
}

.table-scroll {
  overflow-x: auto;
  margin-top: 10px;
}

.table-view table {
  border-collapse: collapse;
  width: 100%;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.table-view th,
.table-view td {
  padding: 5px 10px;
  border-bottom: 1px solid var(--gridline);
  text-align: right;
  white-space: nowrap;
}

.table-view th:first-child,
.table-view td:first-child { text-align: left; }

.table-view thead th {
  position: sticky;
  top: 0;
  background: var(--surface);
  color: var(--text-secondary);
  font-weight: 600;
}

.table-view tr.missing-row td {
  text-align: left;
  color: var(--text-secondary);
  background: var(--hover-wash);
}

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

/* ---------------- footer ---------------- */

.page-foot {
  margin-top: 24px;
  color: var(--text-muted);
  font-size: 12px;
}

.page-foot p { margin: 4px 0; }

@media (max-width: 480px) {
  body { padding: 16px 12px 40px; }
  .charts { grid-template-columns: 1fr; }
  .tiles { grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
}