/* Relay: operations control room
   Local-only styles. System font stacks, no remote assets.
   Structure: tokens > base > shell > topbar > metrics > panels > chart > incidents > detail > responsive */

/* ---------- Tokens ---------- */
:root {
  color-scheme: light;

  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Menlo, Consolas, monospace;

  --bg: #f3f4f6;
  --surface: #ffffff;
  --surface-2: #f8f9fb;
  --hover: #f1f3f6;
  --line: #e0e3e8;
  --line-strong: #c5cad3;
  --ctrl: #858d9b;             /* borders of inputs/buttons, >= 3:1 */

  --text: #161a22;
  --text-2: #454d5c;
  --text-3: #646c7a;

  --accent: #0b64a8;           /* the single accent: selection, focus, primary action, data */
  --accent-bg: #e4f0f9;
  --on-accent: #ffffff;
  --bar: #6595bf;
  --focus: #0b64a8;

  --good: #17734a;
  --bad: #a3480a;

  --sev-critical: #a4160f;  --sev-critical-bg: #fdeceb;
  --sev-high: #8f4304;      --sev-high-bg: #fdefdd;
  --sev-medium: #6b5108;    --sev-medium-bg: #faf1cf;
  --sev-low: #465063;       --sev-low-bg: #eaedf2;

  --radius: 4px;
  --rail-w: 68px;
  --detail-w: 348px;
  --topbar-h: 48px;
}

/* Dark: system preference unless the user chose light explicitly */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0e1116; --surface: #151a21; --surface-2: #1a2028; --hover: #1d242d;
    --line: #262e38; --line-strong: #364050; --ctrl: #667080;
    --text: #e7eaef; --text-2: #adb5c2; --text-3: #8b94a3;
    --accent: #5eb3ea; --accent-bg: #15293b; --on-accent: #06121c; --bar: #3f7eaa; --focus: #5eb3ea;
    --good: #4cc38a; --bad: #f2a05a;
    --sev-critical: #ff9188; --sev-critical-bg: #3b1719;
    --sev-high: #f7a862;     --sev-high-bg: #3a2410;
    --sev-medium: #e6c55c;   --sev-medium-bg: #34290a;
    --sev-low: #b6c1d1;      --sev-low-bg: #252c37;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0e1116; --surface: #151a21; --surface-2: #1a2028; --hover: #1d242d;
  --line: #262e38; --line-strong: #364050; --ctrl: #667080;
  --text: #e7eaef; --text-2: #adb5c2; --text-3: #8b94a3;
  --accent: #5eb3ea; --accent-bg: #15293b; --on-accent: #06121c; --bar: #3f7eaa; --focus: #5eb3ea;
  --good: #4cc38a; --bad: #f2a05a;
  --sev-critical: #ff9188; --sev-critical-bg: #3b1719;
  --sev-high: #f7a862;     --sev-high-bg: #3a2410;
  --sev-medium: #e6c55c;   --sev-medium-bg: #34290a;
  --sev-low: #b6c1d1;      --sev-low-bg: #252c37;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 13px/1.45 var(--font);
  font-variant-numeric: tabular-nums;
  overflow-x: hidden; /* safety net only: layout is built not to overflow */
}
h1, h2, h3, p, dl, dd, ol, ul, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
svg { display: block; }
[hidden] { display: none !important; }

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon { width: 16px; height: 16px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.mono { font-family: var(--mono); font-size: 12px; letter-spacing: -0.005em; }
.num { font-variant-numeric: tabular-nums; }

.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}

/* Visible keyboard focus everywhere */
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.row-btn:focus-visible, .sort-btn:focus-visible { outline-offset: -2px; }

.skip-link {
  position: fixed; top: 8px; left: 8px; z-index: 100;
  padding: 8px 12px; border-radius: var(--radius);
  background: var(--accent); color: var(--on-accent); font-weight: 600; text-decoration: none;
  transform: translateY(-300%);
}
.skip-link:focus { transform: none; }

/* ---------- App shell ---------- */
.app {
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr) var(--detail-w);
  min-height: 100vh;
  min-height: 100dvh;
}
.shell { min-width: 0; display: flex; flex-direction: column; }
.main { display: flex; flex-direction: column; gap: 12px; padding: 12px 16px 28px; min-width: 0; }
.section { scroll-margin-top: calc(var(--topbar-h) + 12px); }
.noscript { padding: 12px; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--surface); }

/* ---------- Navigation rail ---------- */
.rail {
  position: sticky; top: 0; height: 100vh; height: 100dvh;
  display: flex; flex-direction: column; align-items: stretch;
  background: var(--surface); border-right: 1px solid var(--line);
  z-index: 20;
}
.rail-brand {
  display: grid; place-items: center; height: var(--topbar-h);
  color: var(--accent); border-bottom: 1px solid var(--line); text-decoration: none;
}
.brand-mark { width: 22px; height: 22px; fill: currentColor; }
.rail-list { display: flex; flex-direction: column; gap: 2px; padding: 8px 0; }
.rail-link {
  position: relative; display: flex; flex-direction: column; align-items: center; gap: 3px;
  padding: 9px 2px 8px; color: var(--text-2); text-decoration: none; font-size: 10.5px; line-height: 1.1; font-weight: 500; letter-spacing: -0.01em;
}
.rail-link:hover { background: var(--hover); color: var(--text); }
.rail-link[aria-current] { color: var(--accent); background: var(--accent-bg); font-weight: 600; }
.rail-link[aria-current]::before { content: ""; position: absolute; left: 0; top: 6px; bottom: 6px; width: 2px; background: var(--accent); border-radius: 0 2px 2px 0; }
.rail-link .icon { width: 18px; height: 18px; }
.rail-badge {
  position: absolute; top: 4px; left: calc(50% + 6px);
  min-width: 16px; height: 16px; padding: 0 4px; border-radius: 8px;
  background: var(--sev-critical-bg); color: var(--sev-critical); border: 1px solid var(--sev-critical);
  font-size: 10px; font-weight: 700; line-height: 14px; text-align: center;
}

/* ---------- Top status bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 12px;
  height: var(--topbar-h); padding: 0 16px;
  background: var(--surface); border-bottom: 1px solid var(--line);
}
.page-title { display: flex; align-items: baseline; gap: 8px; font-size: 14px; font-weight: 600; white-space: nowrap; }
.page-sep { color: var(--text-3); font-weight: 400; }
.page-name { color: var(--text-2); font-weight: 500; }
.env-chip {
  padding: 1px 7px; border: 1px solid var(--line-strong); border-radius: 3px;
  font-size: 11.5px; font-weight: 600; color: var(--text-2); background: var(--surface-2);
}
.topbar > * { flex: none; }
.topbar-spacer { flex: 1 1 0 !important; min-width: 0; }

.sys-status { display: flex; align-items: center; gap: 10px; min-width: 0; }
.sys-pill { display: inline-flex; align-items: center; gap: 7px; padding: 3px 9px; border-radius: 3px; font-weight: 600; font-size: 12px; white-space: nowrap; }
.sys-pill[data-level="critical"] { background: var(--sev-critical-bg); color: var(--sev-critical); }
.sys-pill[data-level="high"] { background: var(--sev-high-bg); color: var(--sev-high); }
.sys-pill[data-level="medium"] { background: var(--sev-medium-bg); color: var(--sev-medium); }
.sys-pill[data-level="low"], .sys-pill[data-level="ok"] { background: var(--sev-low-bg); color: var(--sev-low); }
.sys-ack { font-size: 12px; color: var(--text-2); white-space: nowrap; }

.clock { white-space: nowrap; display: flex; flex-direction: column; align-items: flex-end; line-height: 1.2; padding-left: 12px; border-left: 1px solid var(--line); }
.clock-now { font-size: 13px; font-weight: 600; font-family: var(--mono); }
.clock-label { font-size: 11px; color: var(--text-3); }

.operator { display: flex; align-items: center; gap: 8px; padding-left: 12px; border-left: 1px solid var(--line); }
.avatar { display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--accent-bg); color: var(--accent); font-size: 11px; font-weight: 700; border: 1px solid var(--accent); }
.operator-meta { display: flex; flex-direction: column; line-height: 1.2; }
.operator-name { font-weight: 600; font-size: 12px; }
.operator-role { font-size: 11px; color: var(--text-3); }

.icon-btn {
  display: inline-grid; place-items: center; width: 30px; height: 30px; padding: 0;
  border: 1px solid transparent; border-radius: var(--radius); background: transparent; color: var(--text-2);
}
.icon-btn:hover { background: var(--hover); color: var(--text); border-color: var(--line); }

/* ---------- Severity + status atoms ---------- */
.sev-mark { width: 8px; height: 8px; flex: none; background: currentColor; }
.sev { display: inline-flex; align-items: center; gap: 6px; padding: 2px 8px 2px 7px; border-radius: 3px; font-size: 12px; font-weight: 600; line-height: 1.4; white-space: nowrap; }
.sev[data-sev="critical"] { background: var(--sev-critical-bg); color: var(--sev-critical); }
.sev[data-sev="high"]     { background: var(--sev-high-bg);     color: var(--sev-high); }
.sev[data-sev="medium"]   { background: var(--sev-medium-bg);   color: var(--sev-medium); }
.sev[data-sev="low"]      { background: var(--sev-low-bg);      color: var(--sev-low); }
/* Shape carries severity as well as colour: diamond, triangle, disc, ring */
[data-sev="critical"] > .sev-mark, .sev-mark[data-sev="critical"] { transform: rotate(45deg) scale(0.86); }
[data-sev="high"] > .sev-mark, .sev-mark[data-sev="high"] { clip-path: polygon(50% 0, 100% 100%, 0 100%); }
[data-sev="medium"] > .sev-mark, .sev-mark[data-sev="medium"] { border-radius: 50%; }
[data-sev="low"] > .sev-mark, .sev-mark[data-sev="low"] { border-radius: 50%; background: transparent; box-shadow: inset 0 0 0 1.5px currentColor; }
.sys-pill[data-level="ok"] > .sev-mark { border-radius: 50%; }

.status {
  display: inline-block; padding: 1px 7px; border: 1px solid var(--line-strong); border-radius: 3px;
  font-size: 12px; line-height: 1.5; color: var(--text-2); background: transparent; white-space: nowrap;
}
.status[data-status="investigating"] { color: var(--accent); border-color: var(--accent); font-weight: 600; }
.status[data-status="open"] { color: var(--text); font-weight: 600; }
.status-wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 2px 6px; }
.ack-tag { display: inline-flex; align-items: center; gap: 3px; font-size: 11.5px; font-weight: 600; color: var(--accent); white-space: nowrap; }
.ack-tag .icon { width: 12px; height: 12px; stroke-width: 2; }

/* ---------- Metrics strip ---------- */
.metrics {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px;
  background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
.metric { display: flex; flex-direction: column; gap: 4px; padding: 12px 14px 11px; background: var(--surface); min-width: 0; }
.metric dt { font-size: 12px; font-weight: 600; color: var(--text-2); }
.metric-value { display: flex; align-items: baseline; gap: 4px; font-size: 26px; line-height: 1.1; font-weight: 600; letter-spacing: -0.01em; }
.metric-unit { font-size: 13px; font-weight: 500; color: var(--text-3); letter-spacing: 0; }
.metric-trend { display: flex; flex-wrap: wrap; align-items: center; gap: 2px 6px; font-size: 12px; color: var(--text-3); }
.trend-delta { display: inline-flex; align-items: center; gap: 3px; font-weight: 600; color: var(--text-2); }
.trend-delta .icon { width: 12px; height: 12px; stroke-width: 2; }
.metric[data-sentiment="good"] .trend-delta, .metric[data-sentiment="good"] .trend-verdict { color: var(--good); }
.metric[data-sentiment="bad"] .trend-delta, .metric[data-sentiment="bad"] .trend-verdict { color: var(--bad); }
.trend-verdict { font-weight: 600; }
.trend-ctx { white-space: nowrap; }

/* ---------- Panels ---------- */
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); min-width: 0; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.panel-head > div { min-width: 0; }
.panel-head h2 { font-size: 13px; font-weight: 600; line-height: 1.3; }
.panel-sub { font-size: 12px; color: var(--text-3); }

.seg { flex: none; display: inline-flex; border: 1px solid var(--ctrl); border-radius: var(--radius); overflow: hidden; }
.seg-btn { padding: 4px 12px; border: 0; background: transparent; font-size: 12px; font-weight: 500; color: var(--text-2); }
.seg-btn + .seg-btn { border-left: 1px solid var(--ctrl); }
.seg-btn:hover { background: var(--hover); }
.seg-btn[aria-pressed="true"] { background: var(--accent); color: var(--on-accent); font-weight: 600; }
.seg-btn:focus-visible { outline-offset: -2px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 30px; padding: 0 12px; border: 1px solid var(--ctrl); border-radius: var(--radius);
  background: var(--surface); color: var(--text); font-size: 13px; font-weight: 600;
}
.btn:hover { background: var(--hover); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent); filter: brightness(1.08); }
.btn-primary[data-state="acked"] { background: transparent; color: var(--text); border-color: var(--ctrl); filter: none; }
.btn-primary[data-state="acked"]:hover { background: var(--hover); }
.link-btn { padding: 4px 2px; border: 0; background: none; color: var(--accent); font-weight: 600; text-decoration: underline; text-underline-offset: 2px; }

/* ---------- Throughput chart ---------- */
.chart-meta { display: flex; align-items: center; justify-content: space-between; gap: 8px 16px; flex-wrap: wrap; padding: 10px 14px 0; }
.chart-stats { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.chart-stats div { display: flex; align-items: baseline; gap: 6px; }
.chart-stats dt { font-size: 12px; color: var(--text-3); }
.chart-stats dd { font-size: 13px; font-weight: 600; }
.chart-stats .sub { font-weight: 400; color: var(--text-3); font-size: 12px; margin-left: 4px; }
.legend-line { display: inline-block; width: 16px; height: 0; border-top: 2px dashed var(--text-2); vertical-align: middle; margin-right: 6px; }
.chart-readout { min-height: 20px; font-size: 12px; color: var(--text-2); display: flex; align-items: baseline; gap: 8px; }
.chart-readout .ro-time { color: var(--text-3); }
.chart-readout .ro-val { font-size: 15px; font-weight: 600; color: var(--text); }
.chart-readout .ro-hint { color: var(--text-3); }

.chart {
  --plot-h: 160px;
  display: grid; grid-template-columns: 30px minmax(0, 1fr); grid-template-rows: var(--plot-h) auto;
  column-gap: 8px; padding: 10px 14px 12px;
}
.y-axis { position: relative; grid-column: 1; grid-row: 1; }
.y-axis span {
  position: absolute; right: 0; bottom: calc(var(--p) * 1%); transform: translateY(50%);
  font-size: 11px; line-height: 1; color: var(--text-3);
}
.plot { position: relative; grid-column: 2; grid-row: 1; border-radius: 2px; touch-action: pan-y; }
.plot .grid-line { position: absolute; left: 0; right: 0; bottom: calc(var(--p) * 1%); border-top: 1px solid var(--line); pointer-events: none; }
.plot .grid-line.base { border-top-color: var(--line-strong); }
.plot .mean-line { position: absolute; left: 0; right: 0; bottom: calc(var(--m) * 1%); border-top: 1.5px dashed var(--text-2); pointer-events: none; z-index: 2; }
.bars { position: absolute; inset: 0; display: grid; grid-template-columns: repeat(24, minmax(0, 1fr)); column-gap: 3px; }
.bar { position: relative; height: 100%; border-radius: 2px; }
.bar .fill { position: absolute; left: 0; right: 0; bottom: 0; height: calc(var(--v) * 1%); background: var(--bar); border-radius: 2px 2px 0 0; }
.bar.is-peak .fill { background: var(--accent); }
.bar.is-active { background: var(--hover); box-shadow: inset 0 0 0 1px var(--line-strong); }
.bar.is-active .fill { background: var(--accent); }
.x-axis { grid-column: 2; grid-row: 2; display: grid; grid-template-columns: repeat(24, minmax(0, 1fr)); column-gap: 3px; margin-top: 6px; }
.x-axis span { text-align: center; font-size: 11px; line-height: 1; color: var(--text-3); visibility: hidden; white-space: nowrap; overflow: visible; }
.x-axis span.t3 { visibility: visible; }
.plot:focus-visible { outline-offset: 3px; }

.chart-table-wrap { max-height: 240px; overflow: auto; margin: 10px 14px 12px; border: 1px solid var(--line); border-radius: var(--radius); }
.chart-table { width: 100%; max-width: 520px; border-collapse: collapse; font-size: 12px; }
.chart-table caption { text-align: left; padding: 6px 10px; color: var(--text-3); }
.chart-table th, .chart-table td { padding: 5px 10px; border-top: 1px solid var(--line); text-align: left; }
.chart-table thead th { position: sticky; top: 0; background: var(--surface-2); color: var(--text-2); font-weight: 600; border-top: 0; box-shadow: 0 1px 0 var(--line); }
.chart-table .r { text-align: right; }
.chart-table tbody th { font-weight: 500; }

/* ---------- Filters ---------- */
.filters { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 10px; padding: 10px 14px; border-bottom: 1px solid var(--line); background: var(--surface-2); }
.search { position: relative; flex: 1 1 200px; max-width: 260px; min-width: 170px; }
.search .icon { position: absolute; left: 8px; top: 50%; transform: translateY(-50%); color: var(--text-3); pointer-events: none; }
.search input {
  width: 100%; height: 30px; padding: 0 8px 0 29px;
  border: 1px solid var(--ctrl); border-radius: var(--radius); background: var(--surface); color: var(--text);
}
.search input::placeholder { color: var(--text-3); opacity: 1; }
.chip-group { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; height: 28px; padding: 0 10px;
  border: 1px solid var(--ctrl); border-radius: 14px; background: var(--surface); color: var(--text-2);
  font-size: 12px; font-weight: 500;
}
.chip:hover { background: var(--hover); }
.chip .chip-n { color: var(--text-3); font-weight: 500; }
.chip .sev-mark { width: 7px; height: 7px; }
.chip[data-sev="critical"] .sev-mark { color: var(--sev-critical); }
.chip[data-sev="high"] .sev-mark { color: var(--sev-high); }
.chip[data-sev="medium"] .sev-mark { color: var(--sev-medium); }
.chip[data-sev="low"] .sev-mark { color: var(--sev-low); }
.chip[aria-pressed="true"] { background: var(--accent-bg); border-color: var(--accent); color: var(--accent); font-weight: 600; }
.chip[aria-pressed="true"] .chip-n { color: inherit; }
.chip[aria-pressed="true"] .sev-mark { color: currentColor; }
.select-field { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-2); }
.select-field select {
  height: 30px; padding: 0 26px 0 8px; border: 1px solid var(--ctrl); border-radius: var(--radius);
  background-color: var(--surface); color: var(--text); font-size: 12.5px; max-width: 100%;
}
.sort-select { display: none; }

@media (min-width: 760px) {
  .filters .chip-group { flex-wrap: nowrap; gap: 0; border: 1px solid var(--ctrl); border-radius: var(--radius); overflow: hidden; background: var(--surface); }
  .filters .chip { height: 28px; padding: 0 10px; border: 0; border-radius: 0; background: transparent; }
  .filters .chip + .chip { border-left: 1px solid var(--ctrl); }
  .filters .chip:hover { background: var(--hover); }
  .filters .chip[aria-pressed="true"] { background: var(--accent-bg); }
  .filters .chip:focus-visible { outline-offset: -2px; }
}

/* ---------- Incident table ---------- */
.table-wrap { overflow: hidden; }
.incidents { width: 100%; border-collapse: collapse; table-layout: fixed; }
.incidents th {
  padding: 0; text-align: left; font-size: 12px; font-weight: 600; color: var(--text-2);
  background: var(--surface); border-bottom: 1px solid var(--line-strong);
}
.sort-btn {
  display: inline-flex; align-items: center; gap: 4px; width: 100%; padding: 8px 10px;
  border: 0; background: transparent; color: inherit; font-size: 12px; font-weight: 600; text-align: left;
}
.sort-btn:hover { background: var(--hover); color: var(--text); }
.sort-btn .icon { width: 12px; height: 12px; stroke-width: 2; opacity: 0; }
.sort-btn[data-active="true"] { color: var(--text); }
.sort-btn[data-active="true"] .icon { opacity: 1; color: var(--accent); }
.incidents th.c-age .sort-btn { flex-direction: row-reverse; justify-content: flex-start; }
.incidents th.c-sev { width: 96px; }
.incidents th.c-svc { width: 120px; }
.incidents th.c-age { width: 68px; }
.incidents th.c-owner { width: 96px; }
.incidents th.c-status { width: 138px; }
@media (min-width: 760px) and (max-width: 899px) {
  .incidents th.c-sev { width: 90px; }
  .incidents th.c-svc { width: 108px; }
  .incidents th.c-age { width: 60px; }
  .incidents th.c-owner { width: 96px; }
  .incidents th.c-status { width: 124px; }
  .incidents td { padding: 0 8px; }
  .sort-btn { padding-left: 8px; padding-right: 8px; }
  .row-btn { padding-left: 8px; padding-right: 8px; }
}

.incidents td { padding: 0 10px; border-top: 1px solid var(--line); vertical-align: middle; }
.incidents tbody tr { cursor: pointer; }
.incidents tbody tr:first-child td { border-top: 0; }
.incidents tbody tr:hover { background: var(--hover); }
.incidents tbody tr.is-selected { background: var(--accent-bg); }
.incidents tbody tr.is-selected td:first-child { box-shadow: inset 3px 0 0 var(--accent); }
.incidents td.c-inc { padding: 0; }
.row-btn {
  display: flex; flex-direction: column; align-items: flex-start; gap: 1px; width: 100%; min-height: 48px; padding: 7px 10px;
  border: 0; background: transparent; text-align: left; color: inherit;
}
.inc-title { font-weight: 600; line-height: 1.3; overflow-wrap: anywhere; }
.inc-id { font-family: var(--mono); font-size: 11.5px; color: var(--text-3); }
.c-svc { font-family: var(--mono); font-size: 12px; overflow-wrap: break-word; }
td.c-age { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.owner-none { color: var(--text-3); }
.c-owner { overflow-wrap: break-word; }

/* ---------- Empty states ---------- */
.empty, .detail-empty { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 6px; padding: 36px 20px; }
.empty-icon { width: 24px; height: 24px; color: var(--text-3); }
.empty-title { font-size: 14px; font-weight: 600; }
.empty-body { max-width: 34ch; color: var(--text-2); margin-bottom: 6px; }
.detail-empty { padding-top: 64px; }

/* ---------- Detail panel ---------- */
.detail {
  position: sticky; top: 0; height: 100vh; height: 100dvh; overflow-y: auto;
  background: var(--surface); border-left: 1px solid var(--line); z-index: 15;
  overscroll-behavior: contain;
}
.detail-head { padding: 14px 16px 10px; }
.detail-kicker { display: flex; align-items: center; gap: 8px; min-height: 30px; }
.detail-id { color: var(--text-2); font-size: 12.5px; }
.detail-close { display: none; margin-left: auto; }
.detail-title { margin-top: 6px; font-size: 17px; line-height: 1.3; font-weight: 600; letter-spacing: -0.005em; }
.detail-actions { padding: 4px 16px 14px; display: flex; flex-direction: column; gap: 8px; border-bottom: 1px solid var(--line); }
.detail-actions .btn { align-self: flex-start; }
.ack-note { font-size: 12px; color: var(--text-3); min-height: 17px; }
.ack-note strong { color: var(--text-2); font-weight: 600; }

.facts { padding: 4px 16px 6px; border-bottom: 1px solid var(--line); }
.facts > div { display: grid; grid-template-columns: 124px minmax(0, 1fr); gap: 8px; padding: 7px 0; border-top: 1px solid var(--line); }
.facts > div:first-child { border-top: 0; }
.facts dt { color: var(--text-3); font-size: 12px; padding-top: 1px; }
.facts dd { font-size: 13px; }

.detail-section { padding: 12px 16px 2px; }
.detail-section:last-child { padding-bottom: 20px; }
.detail-section h3 { font-size: 12px; font-weight: 600; color: var(--text-2); margin-bottom: 4px; }
.detail-section p { color: var(--text); max-width: 60ch; }

.timeline { position: relative; margin-top: 2px; }
.timeline li { position: relative; display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 10px; padding: 4px 0 4px 0; }
.timeline .t { font-family: var(--mono); font-size: 12px; color: var(--text-3); padding-top: 1px; }
.timeline .e { padding-left: 14px; position: relative; }
.timeline .e::before { content: ""; position: absolute; left: 0; top: 7px; width: 7px; height: 7px; border-radius: 50%; background: var(--surface); border: 1.5px solid var(--ctrl); }
.timeline li:not(:last-child) .e::after { content: ""; position: absolute; left: 3px; top: 16px; bottom: -12px; width: 1px; background: var(--line-strong); }
.timeline li.is-ack .e::before { background: var(--accent); border-color: var(--accent); }
.timeline .e-sub { display: block; color: var(--text-3); font-size: 12px; }

.scrim { position: fixed; inset: 0; z-index: 25; background: rgba(8, 11, 16, 0.5); }

/* ---------- Responsive: drawer for the detail panel ---------- */
@media (max-width: 1179px) {
  .app { grid-template-columns: var(--rail-w) minmax(0, 1fr); }
  .detail {
    position: fixed; top: 0; right: 0; bottom: 0; height: auto; width: min(440px, 100vw); z-index: 30;
    transform: translateX(100%); visibility: hidden;
    transition: transform 0.18s ease, visibility 0s linear 0.18s;
    box-shadow: -12px 0 32px rgba(0, 0, 0, 0.22);
  }
  .detail.is-open { transform: none; visibility: visible; transition: transform 0.18s ease, visibility 0s; }
  .detail-close { display: inline-grid; }
  .sys-ack { display: none; }
}
@media (max-width: 1439px) {
  .sys-ack, .clock-label { display: none; }
}
@media (max-width: 1279px) {
  .operator-meta { display: none; }
  .page-sep, .page-name {
    position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
  }
}

/* ---------- Responsive: phone layout ---------- */
@media (max-width: 759px) {
  :root { --topbar-h: 48px; }
  .app { grid-template-columns: minmax(0, 1fr); padding-bottom: 60px; }
  .rail {
    position: fixed; top: auto; left: 0; right: 0; bottom: 0; height: 58px; flex-direction: row;
    border-right: 0; border-top: 1px solid var(--line);
  }
  .rail-brand { display: none; }
  .rail-list { flex: 1; flex-direction: row; gap: 0; padding: 0; }
  .rail-list li { flex: 1; display: flex; }
  .rail-link { flex: 1; justify-content: center; padding: 6px 2px; font-size: 11.5px; }
  .rail-link[aria-current]::before { left: 12px; right: 12px; top: 0; bottom: auto; width: auto; height: 2px; border-radius: 0 0 2px 2px; }
  .rail-badge { top: 4px; left: calc(50% + 8px); }

  .topbar { gap: 8px; padding: 0 12px; }
  .env-chip, .clock, .operator { display: none; }
  .topbar-spacer { flex: 1; }
  .sys-pill { padding: 3px 8px; }
  .main { padding: 10px 12px 20px; gap: 10px; }

  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metric { padding: 10px 12px; }
  .metric-value { font-size: 22px; }

  .panel-head { padding: 10px 12px; }
  .chart-meta { padding: 10px 12px 0; }
  .chart { --plot-h: 148px; grid-template-columns: 26px minmax(0, 1fr); column-gap: 6px; padding: 10px 12px 12px; }
  .bars, .x-axis { column-gap: 2px; }
  .x-axis span.t3 { visibility: hidden; }
  .x-axis span.t6 { visibility: visible; }
  .chart-table-wrap { margin: 10px 12px 12px; }

  .filters { padding: 10px 12px; gap: 8px; }
  .search { flex: 1 1 100%; max-width: none; }
  .search input { height: 40px; font-size: 16px; }
  .chip { height: 36px; padding: 0 12px; font-size: 13px; border-radius: 18px; }
  .select-field { flex: 1 1 calc(50% - 4px); }
  .select-field select { flex: 1; height: 40px; font-size: 16px; min-width: 0; }
  .sort-select { display: inline-flex; }
  .link-btn { min-height: 36px; }
  .seg-btn { min-height: 34px; padding: 0 14px; }
  .icon-btn { width: 40px; height: 40px; }

  /* Table rows become stacked, tappable records. Explicit ARIA roles on the
     table elements keep table semantics when display is overridden. */
  .incidents, .incidents tbody { display: block; }
  .incidents thead {
    position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
  }
  .incidents tbody tr {
    display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; padding: 10px 12px 11px; border-top: 1px solid var(--line);
  }
  .incidents tbody tr:first-child { border-top: 0; }
  .incidents tbody tr.is-selected { box-shadow: inset 3px 0 0 var(--accent); }
  .incidents tbody tr.is-selected td:first-child { box-shadow: none; }
  .incidents td { display: block; padding: 0; border: 0; min-width: 0; }
  .incidents td.c-sev { order: 1; margin-right: auto; }
  .incidents td.c-age { order: 2; text-align: right; color: var(--text-2); }
  .incidents td.c-inc { order: 3; flex: 0 0 100%; }
  .incidents td.c-svc { order: 4; color: var(--text-2); }
  .incidents td.c-owner { order: 5; color: var(--text-2); font-size: 12.5px; }
  .incidents td.c-status { order: 6; margin-left: auto; }
  .row-btn { min-height: 44px; padding: 2px 0; }
  .row-btn:focus-visible { outline-offset: 2px; }
  .inc-title { font-size: 14px; }

  .detail { width: 100vw; box-shadow: none; }
  .detail-head { padding: 12px 14px 8px; }
  .detail-actions, .facts, .detail-section { padding-left: 14px; padding-right: 14px; }
  .detail-actions .btn { align-self: stretch; min-height: 44px; font-size: 14px; }
  .detail-close { width: 40px; height: 40px; margin: -4px -6px -4px auto; }
}

@media (max-width: 379px) {
  .sys-pill { font-size: 11.5px; }
  .metric-value { font-size: 20px; }
}

/* Larger targets on touch devices at any width */
@media (pointer: coarse) and (min-width: 760px) {
  .chip, .seg-btn, .btn, .select-field select, .search input { min-height: 36px; }
  .icon-btn { width: 40px; height: 40px; }
}

/* ---------- Preferences ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0s !important; transition-delay: 0s !important; animation-duration: 0s !important; scroll-behavior: auto !important; }
}
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* Windows High Contrast / forced colors: rely on system colours and real borders */
@media (forced-colors: active) {
  .bar .fill { background: CanvasText; forced-color-adjust: none; }
  .bar.is-active .fill, .bar.is-peak .fill { background: Highlight; }
  .plot .mean-line { border-top-color: CanvasText; }
  .sev, .status, .chip, .sys-pill { border: 1px solid CanvasText; }
  .incidents tbody tr.is-selected { outline: 2px solid Highlight; outline-offset: -2px; }
  .seg-btn[aria-pressed="true"], .chip[aria-pressed="true"], .btn-primary { background: Highlight; color: HighlightText; forced-color-adjust: none; }
  :focus-visible { outline-color: Highlight; }
}