/* Design tokens: light is the default; dark follows the OS setting.
   Palette values follow the validated reference palette (dataviz method). */

:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface-1: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --series-1: #2a78d6;
  --warn-bg: rgba(250, 178, 25, 0.18);
  --warn-border: #c98500;
  --error-bg: rgba(208, 59, 59, 0.12);
  --error-border: #d03b3b;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface-1: #1a1a19;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --series-1: #3987e5;
    --warn-bg: rgba(250, 178, 25, 0.14);
    --warn-border: #fab219;
    --error-bg: rgba(230, 103, 103, 0.14);
    --error-border: #e66767;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 12px 14px 20px;
  background: var(--page);
  color: var(--ink);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

.banner {
  padding: 8px 12px;
  margin: 0 0 12px;
  border-radius: 6px;
  font-size: 0.85rem;
}
.banner.warn { background: var(--warn-bg); border: 1px solid var(--warn-border); }
.banner.error { background: var(--error-bg); border: 1px solid var(--error-border); }

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

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(135px, 1fr));
  gap: 10px;
}

.tile {
  position: relative;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
}
.tile:hover { border-color: var(--baseline); }

/* The whole card is a link to the FRED series page. */
.tile-link::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 8px;
  cursor: pointer;
}
.tile-link:focus-visible::after { box-shadow: 0 0 0 2px var(--series-1); }
.tile-ext { color: var(--muted); font-size: 0.7rem; }
.tile:hover .tile-ext { color: var(--series-1); }

.tile-label { font-size: 0.8rem; color: var(--ink-2); }
.tile-value { font-size: 1.7rem; font-weight: 600; line-height: 1.15; }
.tile-delta { font-size: 0.8rem; color: var(--ink-2); margin-top: 1px; }
.tile-arrow { font-size: 0.7rem; }
.tile-spark { margin: 8px 0 5px; min-height: 44px; }
.tile-asof { font-size: 0.72rem; color: var(--muted); }
.tile-plain {
  font-size: 0.75rem;
  color: var(--ink-2);
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--grid);
}
.tile-stale {
  font-size: 0.72rem;
  margin-top: 4px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
}

/* ------------------------------------------------------------- sparklines */

.spark { position: relative; z-index: 2; outline: none; cursor: crosshair; }
.spark:focus-visible { box-shadow: 0 0 0 2px var(--series-1); border-radius: 4px; }
.spark svg { display: block; touch-action: none; }

.spark-readout {
  display: none;
  position: absolute;
  top: -6px;
  z-index: 2;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  padding: 3px 8px;
  font-size: 0.78rem;
  pointer-events: none;
  white-space: nowrap;
}
.spark-readout span { color: var(--muted); }

footer { margin-top: 12px; color: var(--muted); font-size: 0.75rem; }
footer p { margin: 0; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}