/* ============================================================
   Status Board — visual layer
   Tokens in :root; dark mode is a single media override.
   ============================================================ */


/* 1. Tokens */

:root {
  --ok:#16a34a; --warn:#ca8a04; --fail:#dc2626; --nodata:#6b7280;
  --bg:#ffffff; --bg-card:#f9fafb; --fg:#111827;
  --fg-muted:#6b7280; --border:#e5e7eb; --accent:#2563eb;

  --shadow-1:0 1px 2px rgb(0 0 0 / .04);
  --shadow-2:0 8px 24px -8px rgb(0 0 0 / .12);
  --radius:12px; --radius-sm:6px;

  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg:#0b0f17; --bg-card:#131a26; --fg:#f3f4f6;
    --fg-muted:#9ca3af; --border:#1f2937;

    --shadow-1:0 1px 2px rgb(0 0 0 / .45);
    --shadow-2:0 12px 28px -10px rgb(0 0 0 / .6);

    color-scheme: dark;
  }
}

/* 2. Reset / base */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, p, dl, dd { margin: 0; }
h1, h2 { font-weight: 600; letter-spacing: -0.01em; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

button {
  font: inherit; color: inherit;
  background: none; border: 0; cursor: pointer;
}

/* 3. Page chrome */

.page-header, main, .page-footer {
  width: min(960px, 100% - 2.5rem);
  margin-inline: auto;
}

main { flex: 1; padding-block: 1.5rem 2rem; }

.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .75rem;
  padding-block: 1.5rem .75rem;
}

.page-header h1 { font-size: clamp(1.5rem, 1rem + 1.5vw, 2rem); }

.page-header__subtitle {
  flex-basis: 100%;
  color: var(--fg-muted);
  font-size: .95rem;
}

.page-footer {
  padding-block: 1.25rem;
  border-top: 1px solid var(--border);
}

.page-footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  margin: 0;
  color: var(--fg-muted);
  font-size: .875rem;
}

@media (max-width: 480px) {
  .page-footer__meta { justify-content: center; }
  #refresh-btn { width: 100%; }
}

#last-refresh { font-variant-numeric: tabular-nums; }

#refresh-btn {
  padding: .4rem .85rem;
  background: var(--bg-card);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-weight: 500;
  transition: border-color 120ms, color 120ms, transform 120ms;
}
#refresh-btn:hover { border-color: var(--accent); color: var(--accent); }
#refresh-btn:active { transform: translateY(1px); }

/* 4. Status board grid */

.status-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

@media (max-width: 600px) {
  .status-board { grid-template-columns: 1fr; }
}

/* 5. Card */

.status-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  height: 100%;                /* equal-height rows in the grid */
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  transition: box-shadow 180ms, transform 180ms, border-color 180ms;
}

.status-card:hover,
.status-card:focus-within {
  border-color: var(--accent);
  box-shadow: var(--shadow-2);
  transform: translateY(-1px);
}

.status-card__header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .6rem;
}

.status-card__name {
  margin-right: auto;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--fg);
}

.status-card__group {
  padding: 2px .55rem;
  color: var(--fg-muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.status-card__group:empty { display: none; }

.status-card__dot {
  flex: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--nodata);
  box-shadow: 0 0 0 0 transparent;
}

.status-card[data-status="healthy"]   .status-card__dot { background: var(--ok);   }
.status-card[data-status="unhealthy"] .status-card__dot { background: var(--fail); }
.status-card[data-status="nodata"]    .status-card__dot { background: var(--nodata); }

@media (prefers-reduced-motion: no-preference) {
  .status-card[data-status="unhealthy"] .status-card__dot {
    animation: pulse-fail 1.6s ease-out infinite;
  }
}

@keyframes pulse-fail {
  0%   { box-shadow: 0 0 0 0    color-mix(in srgb, var(--fail) 55%, transparent); }
  70%  { box-shadow: 0 0 0 10px color-mix(in srgb, var(--fail) 0%,  transparent); }
  100% { box-shadow: 0 0 0 0    color-mix(in srgb, var(--fail) 0%,  transparent); }
}

.status-card__metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .75rem 1rem;
  padding: 0;
  margin: 0;
}

.status-card__metric {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  min-width: 0;
}

.status-card__metric-label {
  font-size: .6875rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.status-card__metric-value {
  font-size: 1.0625rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--fg);
}

@media (max-width: 600px) {
  .status-card__metrics { grid-template-columns: 1fr; gap: .5rem; }
  .status-card__metric  {
    flex-direction: row;
    justify-content: space-between;
    align-items: baseline;
  }
}

.status-card__history {
  display: flex;
  flex-wrap: nowrap;
  gap: 2px;
  margin-top: auto;
  /* newest = last in DOM → right side via default row direction */
}

.status-card__history-cell {
  flex: 1 1 auto;
  height: 10px;
  min-width: 4px;
  border-radius: 2px;
  background: var(--border);
}

.status-card__history-cell[data-success="true"]  { background: var(--ok);   }
.status-card__history-cell[data-success="false"] { background: var(--fail); }

.status-card[data-status="nodata"] .status-card__metrics,
.status-card[data-status="nodata"] .status-card__history { display: none; }

.status-card[data-status="nodata"]::after {
  content: "No data yet";
  color: var(--fg-muted);
  font-style: italic;
  font-size: .95rem;
}

/* 6. Error state */

.status-error {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .75rem;
  max-width: 32rem;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  background: color-mix(in srgb, var(--fail) 8%, var(--bg-card));
  border: 1px solid var(--fail);
  border-radius: var(--radius);
  color: var(--fg);
}

.status-error[hidden] { display: none; }

.status-error::before {
  content: "";
  display: block;
  width: 1.25rem; height: 1.25rem;
  background: var(--fail);
  clip-path: polygon(50% 0, 100% 100%, 0 100%); /* CSS triangle */
}

.status-error button {
  padding: .4rem .85rem;
  background: transparent;
  color: var(--fail);
  border: 1px solid var(--fail);
  border-radius: var(--radius-sm);
  font-weight: 500;
  transition: background 120ms, color 120ms;
}

.status-error button:hover { background: var(--fail); color: var(--bg); }

/* 7. Accessibility / motion */

:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Visually hidden but available to assistive tech */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}