/* Delta Metrics Platform — ops ledger.
   Dark-first, flat surfaces, hairline rules, mono numerals. No glow, no
   gradients outside data marks. Light mode derives from the same roles. */

:root {
  --surface-0: #141412;
  --surface-1: #1a1a19;
  --surface-2: #222220;
  --line: #32322f;
  --line-strong: #4a4a45;
  --ink: #f2f1ea;
  --ink-2: #c3c2b7;
  --ink-3: #8b8a80;
  --accent: #e8e3d1;          /* warm ivory — UI accent, not a data color */
  --series-1: #3987e5;        /* validated dark categorical steps */
  --series-2: #199e70;
  --series-3: #c98500;
  --series-4: #e66767;
  --good: #0ca30c;
  --warning: #fab219;
  --serious: #ec835a;
  --critical: #d03b3b;
  --font-display: "Archivo", "Helvetica Neue", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --surface-0: #f5f4f0;
    --surface-1: #fcfcfb;
    --surface-2: #f0efec;
    --line: #e2e1db;
    --line-strong: #c9c8c0;
    --ink: #0b0b0b;
    --ink-2: #52514e;
    --ink-3: #8b8a80;
    --accent: #23221e;
    --series-1: #2a78d6;
    --series-2: #1baf7a;
    --series-3: #eda100;
    --series-4: #e34948;
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { color-scheme: dark light; }

body {
  background: var(--surface-0);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 14px;
  line-height: 1.45;
  min-height: 100vh;
}

.hidden { display: none !important; }

/* ---------- login gate ---------- */

.gate {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-0);
  z-index: 40;
}
.gate-card {
  width: min(360px, 90vw);
  border: 1px solid var(--line-strong);
  background: var(--surface-1);
  padding: 32px 28px;
}
.gate-kicker {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--ink-3);
}
.gate-title { font-size: 28px; font-weight: 700; margin: 2px 0 22px; }
.field { display: block; margin-bottom: 14px; }
.field span {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 5px;
}
.field input {
  width: 100%;
  background: var(--surface-0);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 9px 10px;
  border-radius: 0;
}
.field input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.gate-card button {
  width: 100%;
  margin-top: 8px;
  background: var(--accent);
  color: var(--surface-0);
  border: none;
  font-family: var(--font-display);
  font-weight: 700; font-size: 14px;
  padding: 11px;
  cursor: pointer;
}
.gate-error { color: var(--critical); font-size: 13px; margin: 4px 0 8px; }

/* ---------- shell ---------- */

.shell { max-width: 1280px; margin: 0 auto; padding: 0 24px 64px; }

.masthead {
  display: flex; align-items: center; gap: 28px;
  padding: 18px 0 14px;
  border-bottom: 1px solid var(--line-strong);
  flex-wrap: wrap;
}
.masthead-brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 14px; height: 14px;
  background: var(--accent);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);  /* the delta */
}
.brand-kicker {
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--ink-3);
}
.brand-title { font-size: 18px; font-weight: 700; line-height: 1.1; }

.tabs { display: flex; gap: 2px; flex: 1; flex-wrap: wrap; }
.tabs button {
  background: none; border: none;
  border-bottom: 2px solid transparent;
  color: var(--ink-2);
  font-family: var(--font-display);
  font-size: 13px; font-weight: 600;
  letter-spacing: 0.02em;
  padding: 8px 14px 10px;
  cursor: pointer;
}
.tabs button:hover { color: var(--ink); }
.tabs button.active { color: var(--ink); border-bottom-color: var(--accent); }

.masthead-meta { display: flex; align-items: center; gap: 10px; }
.clock { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); }
.ghost {
  background: none;
  border: 1px solid var(--line-strong);
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.08em;
  padding: 6px 12px;
  cursor: pointer;
}
.ghost:hover { color: var(--ink); border-color: var(--ink-3); }

/* ---------- panels & layout ---------- */

.tab-panel { padding-top: 22px; }

.tile-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-bottom: 22px;
}
.tile {
  background: var(--surface-1);
  padding: 16px 18px 14px;
}
.tile .t-label {
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--ink-3);
}
.tile .t-value {
  font-family: var(--font-mono);
  font-size: 26px; font-weight: 600;
  font-variant-numeric: tabular-nums;
  margin-top: 6px;
}
.tile .t-sub { font-size: 12px; color: var(--ink-2); margin-top: 2px; }
.tile.stat-bad .t-value { color: var(--critical); }
.tile.stat-warn .t-value { color: var(--warning); }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-bottom: 22px;
}
@media (max-width: 900px) { .grid-2 { grid-template-columns: 1fr; } }

.panel {
  border: 1px solid var(--line);
  background: var(--surface-1);
  min-width: 0;
}
.panel-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px;
  padding: 13px 18px 11px;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.panel-head h2 { font-size: 13px; font-weight: 700; letter-spacing: 0.02em; }
.panel-note { font-family: var(--font-mono); font-size: 10px; color: var(--ink-3); }
.badge {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--ink-2);
}
.badge.bad { color: var(--critical); }

.chart-slot { padding: 16px 18px 18px; min-height: 180px; position: relative; }
.chart-slot:empty::after {
  content: attr(data-empty);
  color: var(--ink-3); font-size: 12px; font-family: var(--font-mono);
}
.table-slot { overflow-x: auto; }

.note {
  padding: 14px 18px;
  color: var(--ink-3);
  font-family: var(--font-mono); font-size: 12px;
}

/* ---------- tables ---------- */

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  font-weight: 500;
  color: var(--ink-3);
  padding: 9px 18px 7px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
td {
  padding: 9px 18px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
tr:last-child td { border-bottom: none; }
td.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
td.dim { color: var(--ink-3); }
td.wrap { max-width: 420px; }
.mono { font-family: var(--font-mono); font-size: 12px; }

.status-dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  margin-right: 7px; vertical-align: 1px;
}
.st-ok { background: var(--good); }
.st-warn { background: var(--warning); }
.st-bad { background: var(--critical); }
.st-off { background: var(--ink-3); }

.pill {
  display: inline-block;
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.1em; text-transform: uppercase;
  border: 1px solid var(--line-strong);
  color: var(--ink-2);
  padding: 2px 8px;
  white-space: nowrap;
}
.pill.p-running { color: var(--warning); border-color: var(--warning); }
.pill.p-done { color: var(--good); border-color: var(--good); }
.pill.p-failed { color: var(--critical); border-color: var(--critical); }

.rowbtn {
  background: none; border: 1px solid var(--line-strong);
  color: var(--ink-2); font-family: var(--font-mono); font-size: 10px;
  padding: 3px 9px; cursor: pointer; white-space: nowrap;
}
.rowbtn:hover { color: var(--ink); }

a { color: inherit; text-decoration: underline; text-decoration-color: var(--ink-3); }
a:hover { text-decoration-color: var(--ink); }

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

.filters { display: flex; align-items: center; gap: 14px; }
.filters select {
  background: var(--surface-0);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  font-family: var(--font-mono); font-size: 12px;
  padding: 5px 8px;
}
.check { font-size: 12px; color: var(--ink-2); display: flex; gap: 6px; align-items: center; }

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

.viz { width: 100%; display: block; }
.viz .grid-line { stroke: var(--line); stroke-width: 1; }
.viz .axis-label {
  fill: var(--ink-3);
  font-family: var(--font-mono); font-size: 10px;
}
.viz .bar-label {
  fill: var(--ink-2);
  font-family: var(--font-mono); font-size: 11px;
}
.viz .bar-value {
  fill: var(--ink); font-family: var(--font-mono); font-size: 11px;
  font-variant-numeric: tabular-nums;
}
.viz .hover-col { fill: transparent; }
.viz .crosshair { stroke: var(--line-strong); stroke-width: 1; stroke-dasharray: 3 3; }

.legend {
  display: flex; gap: 18px; flex-wrap: wrap;
  padding-top: 10px;
  font-size: 12px; color: var(--ink-2);
}
.legend .key {
  display: inline-block; width: 10px; height: 10px; margin-right: 6px;
  vertical-align: -1px;
}

.tooltip {
  position: fixed;
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  font-family: var(--font-mono); font-size: 11px;
  padding: 7px 10px;
  pointer-events: none;
  z-index: 50;
  max-width: 280px;
}
.tooltip .tt-title { color: var(--ink-3); margin-bottom: 3px; }
.tooltip .tt-row { display: flex; justify-content: space-between; gap: 14px; }

/* ---------- activity ---------- */

.repo-block { margin-bottom: 22px; }
.repo-block > h3 {
  font-family: var(--font-mono);
  font-size: 12px; letter-spacing: 0.08em;
  color: var(--ink-2);
  margin-bottom: 8px;
}

.foot {
  border-top: 1px solid var(--line);
  margin-top: 30px; padding-top: 12px;
  font-family: var(--font-mono); font-size: 11px; color: var(--ink-3);
}