/* Relay — operations control room.
   Calm, high-density, neutral + one accent. No gradients, no glass. */

:root {
  --bg: #f2f3f5;
  --surface: #ffffff;
  --surface-2: #f7f8f9;
  --border: #e2e5ea;
  --border-strong: #c9cfd7;
  --text: #171a1f;
  --muted: #5b6470;
  --faint: #8b94a1;
  --accent: #1d4ed8;
  --accent-strong: #1e40af;
  --accent-soft: #e9effc;
  --accent-ink: #ffffff;
  --row-hover: #f3f6fd;
  --row-selected: #e9effc;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06);
  --radius: 6px;
  --radius-sm: 4px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;

  --sev-critical-fg: #b42318; --sev-critical-bg: #fee4e2; --sev-critical-bd: #f3b7b1;
  --sev-high-fg: #b54708;     --sev-high-bg: #ffead5;     --sev-high-bd: #f5c99b;
  --sev-medium-fg: #854d0e;   --sev-medium-bg: #fef3c7;   --sev-medium-bd: #ecd189;
  --sev-low-fg: #475569;      --sev-low-bg: #eef2f5;      --sev-low-bd: #cbd5e1;

  --st-open-fg: #b42318;          --st-open-bg: #fee4e2;
  --st-investigating-fg: #1d4ed8; --st-investigating-bg: #e9effc;
  --st-monitoring-fg: #854d0e;    --st-monitoring-bg: #fef3c7;
  --st-acknowledged-fg: #067647;  --st-acknowledged-bg: #dcfae6;
  --st-resolved-fg: #475569;      --st-resolved-bg: #eef2f5;
}

[data-theme="dark"] {
  --bg: #0e1116;
  --surface: #161b22;
  --surface-2: #1c222b;
  --border: #262d37;
  --border-strong: #39414d;
  --text: #e8ebef;
  --muted: #9aa4b2;
  --faint: #6d7684;
  --accent: #7aa2ff;
  --accent-strong: #9db9ff;
  --accent-soft: #22314f;
  --accent-ink: #0e1116;
  --row-hover: #1c2534;
  --row-selected: #22314f;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);

  --sev-critical-fg: #fda29b; --sev-critical-bg: #3d1a16; --sev-critical-bd: #7a2e26;
  --sev-high-fg: #fdb022;     --sev-high-bg: #3a2708;     --sev-high-bd: #7a5410;
  --sev-medium-fg: #fec84b;   --sev-medium-bg: #37300f;   --sev-medium-bd: #6e5f1c;
  --sev-low-fg: #b6c0cd;      --sev-low-bg: #232b35;      --sev-low-bd: #3d4754;

  --st-open-fg: #fda29b;          --st-open-bg: #3d1a16;
  --st-investigating-fg: #9db9ff; --st-investigating-bg: #22314f;
  --st-monitoring-fg: #fec84b;    --st-monitoring-bg: #37300f;
  --st-acknowledged-fg: #6ce9a6;  --st-acknowledged-bg: #123325;
  --st-resolved-fg: #b6c0cd;      --st-resolved-bg: #232b35;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.45;
  color: var(--text);
  background: var(--bg);
  font-variant-numeric: tabular-nums;
}

h1, h2, h3, p, dl, dd, dt, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; }

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

.skip-link {
  position: absolute;
  left: 12px; top: -48px;
  z-index: 100;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 12px; }

/* Visible keyboard focus everywhere */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.num, .mono, code.mono, .clock, .metric-value, .metric-delta, .peak-note {
  font-variant-numeric: tabular-nums;
}
.mono, code.mono { font-family: var(--mono); font-size: 12px; }

/* ---------- Top status bar ---------- */
.statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: 6px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 40;
}
.statusbar-group { display: flex; align-items: center; gap: 10px; min-width: 0; }
.statusbar-right { margin-left: auto; }

.brand { display: flex; align-items: center; gap: 8px; color: var(--text); }
.brand-mark { color: var(--accent); flex: none; }
.brand-name { font-weight: 700; font-size: 15px; letter-spacing: 0.01em; }

.env-pill {
  font-size: 10px; font-weight: 700; letter-spacing: 0.08em;
  color: var(--muted);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
}
.statusbar-divider { width: 1px; height: 20px; background: var(--border); }

.alert-pill {
  display: flex; align-items: center; gap: 7px;
  font-size: 12.5px; font-weight: 600; color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 11px 3px 8px;
  white-space: nowrap;
}
.alert-pill.is-clear { color: var(--muted); font-weight: 500; }
.dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.dot-alert { background: #f04438; }
.dot-clear { background: #12b76a; }
.dot-live { background: #12b76a; }

.live-indicator {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 600; color: var(--muted);
}
.live-indicator .dot-live { animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: 0.35; } }

.clock { font-family: var(--mono); font-size: 12.5px; color: var(--muted); white-space: nowrap; }

.operator { display: flex; align-items: center; gap: 8px; }
.avatar {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent-strong);
  font-size: 10.5px; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center;
  flex: none;
}
[data-theme="dark"] .avatar { color: var(--accent); }
.operator-name { font-size: 12.5px; color: var(--muted); white-space: nowrap; }

/* ---------- Shell: rail + main ---------- */
.shell { display: flex; align-items: stretch; min-height: calc(100vh - 48px); }

.rail {
  width: 172px; flex: none;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 12px 8px;
  display: flex; flex-direction: column; gap: 4px;
  position: sticky; top: 48px;
  height: calc(100vh - 48px);
}
.rail-list { list-style: none; display: flex; flex-direction: column; gap: 2px; }
.rail-link {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  color: var(--muted); font-size: 13px; font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  background: none; cursor: pointer; width: 100%;
  font-family: inherit; text-align: left;
}
.rail-link svg { flex: none; }
.rail-link:hover { background: var(--surface-2); color: var(--text); }
.rail-link.is-active {
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 600;
}
[data-theme="dark"] .rail-link.is-active { color: var(--accent); }
.rail-badge {
  margin-left: auto;
  font-size: 11px; font-weight: 700;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 999px;
  padding: 0 7px;
  line-height: 18px;
}
.rail-link.is-active .rail-badge { background: var(--surface); }
.rail-theme { margin-top: auto; }

/* ---------- Main column ---------- */
.main {
  flex: 1; min-width: 0;
  padding: 16px 20px 24px;
  max-width: 1360px;
}
.main:focus { outline: none; }
.main:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

.pagehead {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 12px; margin-bottom: 14px;
}
.page-title { font-size: 18px; font-weight: 700; letter-spacing: -0.01em; }
.page-sub { font-size: 12.5px; color: var(--muted); margin-top: 2px; }
.slo-note { font-size: 12.5px; color: var(--muted); white-space: nowrap; }
.slo-note strong { color: var(--text); }

.section { margin-bottom: 14px; }
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
}
.panel-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 12px; margin-bottom: 10px;
}
.panel-title { font-size: 13.5px; font-weight: 700; }
.panel-sub { font-size: 12px; color: var(--muted); margin-top: 1px; }
.peak-note { font-size: 12px; color: var(--muted); white-space: nowrap; }
.peak-note strong { color: var(--text); }

/* ---------- Metrics ---------- */
.metrics {
  list-style: none;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}
.metric {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 10px 12px 9px;
  min-width: 0;
}
.metric-label {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.metric-value { font-size: 21px; font-weight: 700; letter-spacing: -0.01em; margin-top: 2px; }
.metric-delta { font-size: 12px; color: var(--muted); margin-top: 1px; white-space: nowrap; }
.metric-delta .arrow { font-size: 10px; }
.metric-delta.good { color: #067647; }
.metric-delta.bad { color: #b42318; }
[data-theme="dark"] .metric-delta.good { color: #6ce9a6; }
[data-theme="dark"] .metric-delta.bad { color: #fda29b; }
.metric-base { color: var(--faint); font-size: 11.5px; }

/* ---------- Layout columns ---------- */
.columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 14px;
  align-items: start;
}
.primary { min-width: 0; display: flex; flex-direction: column; gap: 14px; }
.primary .section { margin-bottom: 0; }

/* ---------- Chart ---------- */
.chart-wrap { position: relative; }
.chart-wrap svg { display: block; width: 100%; height: auto; }
.chart-grid { stroke: var(--border); stroke-width: 1; }
.chart-tick { fill: var(--faint); font-size: 10px; font-family: var(--mono); }
.chart-bar { fill: #9db4e8; }
[data-theme="dark"] .chart-bar { fill: #3d5a9e; }
.chart-bar:hover { fill: var(--accent); }
.chart-bar.peak { fill: var(--accent); }
.chart-tip {
  position: absolute;
  pointer-events: none;
  background: var(--text); color: var(--bg);
  font-size: 12px; font-family: var(--mono);
  padding: 4px 8px; border-radius: var(--radius-sm);
  white-space: nowrap;
  transform: translate(-50%, -110%);
  z-index: 5;
}
.chart-tip[hidden] { display: none; }

/* ---------- Filters ---------- */
.filters {
  display: grid;
  grid-template-columns: 1fr 170px 170px;
  gap: 8px;
  margin-bottom: 10px;
}
.filter-field { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.filter-label {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--muted);
}
.input {
  font: inherit; font-size: 13px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 6px 9px;
  width: 100%;
}
.input::placeholder { color: var(--faint); }
select.input {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6'><path d='M1 1l4 4 4-4' fill='none' stroke='%235b6470' stroke-width='1.5' stroke-linecap='round'/></svg>");
  background-repeat: no-repeat;
  background-position: right 9px center;
  padding-right: 26px;
}

/* ---------- Buttons ---------- */
.btn {
  font: inherit; font-size: 13px; font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  padding: 7px 14px;
  cursor: pointer;
  white-space: nowrap;
}
.btn-sm { padding: 5px 10px; font-size: 12.5px; }
.btn-primary { background: #1d4ed8; border-color: #1d4ed8; color: #fff; }
.btn-primary:hover { background: #1e40af; border-color: #1e40af; }
[data-theme="dark"] .btn-primary { background: #7aa2ff; border-color: #7aa2ff; color: #0e1116; }
[data-theme="dark"] .btn-primary:hover { background: #9db9ff; border-color: #9db9ff; }
.btn-primary:disabled {
  background: var(--surface-2); border-color: var(--border);
  color: var(--muted); cursor: default;
}
.btn-secondary {
  background: var(--surface); border-color: var(--border-strong); color: var(--text);
}
.btn-secondary:hover { background: var(--surface-2); }
.btn-ghost { background: none; border-color: transparent; color: var(--accent-strong); }
[data-theme="dark"] .btn-ghost { color: var(--accent); }
.btn-ghost:hover { background: var(--accent-soft); }

/* ---------- Incident table ---------- */
.table-wrap { overflow-x: auto; }
.incident-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.incident-table th {
  text-align: left;
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--muted);
  padding: 6px 10px;
  border-bottom: 1px solid var(--border-strong);
  white-space: nowrap;
}
.incident-table th.num, .incident-table td.num { text-align: right; }
.incident-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.incident-table tbody tr:last-child td { border-bottom: none; }
.incident-table tbody tr {
  cursor: pointer;
  border-left: 2px solid transparent;
}
.incident-table tbody tr:hover { background: var(--row-hover); }
.incident-table tbody tr.is-selected {
  background: var(--row-selected);
  border-left-color: var(--accent);
}
.incident-table tbody tr:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.cell-incident { min-width: 180px; }
.cell-title { font-weight: 600; }
.cell-id { font-family: var(--mono); font-size: 11.5px; color: var(--muted); }
.cell-service { font-family: var(--mono); font-size: 12px; white-space: nowrap; }
.cell-owner { white-space: nowrap; }
.cell-owner.unassigned { color: var(--faint); font-style: italic; }

.sev-badge {
  display: inline-block;
  font-size: 11px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase;
  border: 1px solid;
  border-radius: var(--radius-sm);
  padding: 1px 7px;
  white-space: nowrap;
}
.sev-critical { color: var(--sev-critical-fg); background: var(--sev-critical-bg); border-color: var(--sev-critical-bd); }
.sev-high     { color: var(--sev-high-fg);     background: var(--sev-high-bg);     border-color: var(--sev-high-bd); }
.sev-medium   { color: var(--sev-medium-fg);   background: var(--sev-medium-bg);   border-color: var(--sev-medium-bd); }
.sev-low      { color: var(--sev-low-fg);      background: var(--sev-low-bg);      border-color: var(--sev-low-bd); }

.status-pill {
  display: inline-block;
  font-size: 12px; font-weight: 600;
  border-radius: 999px;
  padding: 1px 9px;
  white-space: nowrap;
}
.status-open { color: var(--st-open-fg); background: var(--st-open-bg); }
.status-investigating { color: var(--st-investigating-fg); background: var(--st-investigating-bg); }
.status-monitoring { color: var(--st-monitoring-fg); background: var(--st-monitoring-bg); }
.status-acknowledged { color: var(--st-acknowledged-fg); background: var(--st-acknowledged-bg); }
.status-resolved { color: var(--st-resolved-fg); background: var(--st-resolved-bg); }

.empty-state {
  text-align: center;
  padding: 28px 16px;
  color: var(--muted);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  margin-top: 4px;
}
.empty-state svg { color: var(--faint); margin-bottom: 8px; }
.empty-title { font-weight: 600; color: var(--text); font-size: 13.5px; }
.empty-sub { font-size: 12.5px; margin: 3px 0 10px; }

.table-hint { font-size: 12px; color: var(--faint); margin-top: 8px; }
.table-hint kbd {
  font-family: var(--mono); font-size: 11px;
  border: 1px solid var(--border); border-bottom-width: 2px;
  border-radius: 3px; padding: 0 4px;
  background: var(--surface-2);
}

/* ---------- Detail panel ---------- */
.detail { position: sticky; top: 60px; }
.detail-kicker {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 6px;
}
.detail-head p { margin-bottom: 4px; }
.detail-head .mono { color: var(--muted); margin-left: 6px; }
.detail-title { font-size: 15px; font-weight: 700; line-height: 1.3; margin-top: 4px; }
.detail-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 8px 12px;
  margin: 12px 0;
  padding: 10px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.detail-grid dt {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--muted);
}
.detail-grid dd { font-size: 13px; font-weight: 500; margin-top: 1px; }
.detail-desc { font-size: 13px; color: var(--text); }
.detail-h {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--muted);
  margin: 12px 0 6px;
}
.signals { list-style: none; display: flex; flex-direction: column; }
.signals li {
  display: flex; justify-content: space-between; gap: 8px;
  font-size: 12.5px;
  padding: 5px 2px;
  border-bottom: 1px solid var(--border);
}
.signals li:last-child { border-bottom: none; }
.signals li b { font-weight: 700; }
.signals li b.warn { color: var(--sev-high-fg); }
.signals li b.crit { color: var(--sev-critical-fg); }

.timeline { list-style: none; display: flex; flex-direction: column; gap: 0; }
.timeline li {
  position: relative;
  font-size: 12.5px;
  padding: 0 0 10px 18px;
  border-left: 2px solid var(--border);
  margin-left: 4px;
}
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: "";
  position: absolute; left: -5px; top: 4px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--border-strong);
}
.timeline li.is-now::before { border-color: var(--accent); background: var(--accent); }
.timeline time { display: block; font-family: var(--mono); font-size: 11px; color: var(--faint); }

.detail-actions { display: flex; gap: 8px; margin-top: 14px; }
.detail-actions .btn-primary { flex: 1; }
.detail-note { font-size: 12px; color: var(--muted); margin-top: 8px; }
.ack-confirm { font-size: 12.5px; color: #067647; font-weight: 600; margin-top: 8px; }
[data-theme="dark"] .ack-confirm { color: #6ce9a6; }

/* ---------- Footer ---------- */
.footer { margin-top: 8px; }
.footer p { font-size: 12px; color: var(--faint); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .columns { grid-template-columns: 1fr; }
  .detail { position: static; }
}

@media (max-width: 760px) {
  .shell { flex-direction: column; }
  .statusbar { padding: 6px 12px; }
  .operator-name, .env-pill { display: none; }
  .rail {
    width: 100%; height: auto;
    position: static;
    flex-direction: row; align-items: center;
    border-right: none; border-bottom: 1px solid var(--border);
    padding: 6px 8px;
    overflow-x: auto;
  }
  .rail-list { flex-direction: row; gap: 4px; }
  .rail-link { padding: 6px 8px; white-space: nowrap; }
  .rail-badge { margin-left: 2px; }
  .rail-theme { margin: 0 0 0 auto; width: auto; }
  .main { padding: 12px 12px 20px; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .filters { grid-template-columns: 1fr 1fr; }
  .filter-search { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .pagehead { align-items: flex-start; }
  .slo-note { display: none; }

  /* Incident rows become compact cards; thead hidden but kept for AT. */
  .incident-table thead {
    position: absolute; width: 1px; height: 1px;
    clip: rect(0 0 0 0); clip-path: inset(50%);
    overflow: hidden; white-space: nowrap;
  }
  .incident-table, .incident-table tbody { display: block; }
  .incident-table tbody { display: flex; flex-direction: column; gap: 8px; }
  .incident-table tbody tr {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4px 10px;
    border: 1px solid var(--border);
    border-left: 2px solid transparent;
    border-radius: var(--radius-sm);
    padding: 8px 10px;
  }
  .incident-table tbody tr.is-selected { border-left-color: var(--accent); }
  .incident-table td { border: none; padding: 0; min-width: 0; }
  .incident-table td[data-label]::before {
    content: attr(data-label);
    display: block;
    font-size: 10.5px; font-weight: 600;
    letter-spacing: 0.05em; text-transform: uppercase;
    color: var(--faint);
  }
  .cell-severity { grid-column: 1; grid-row: 1; }
  .cell-status { grid-column: 2; grid-row: 1; align-self: start; }
  .cell-status::before { display: none !important; }
  .cell-incident { grid-column: 1 / -1; grid-row: 2; }
  .cell-service, .cell-age, .cell-owner { grid-row: 3; }
  .cell-service { grid-column: 1 / -1; }
  .cell-age { grid-column: 1; }
  .cell-owner { grid-column: 2; text-align: right; }
  .incident-table td.num { text-align: left; }
  .cell-owner[data-label]::before { text-align: right; }
}

@media (max-width: 390px) {
  .metrics { gap: 8px; }
  .metric-value { font-size: 18px; }
  .filters { grid-template-columns: 1fr; }
  .alert-pill { font-size: 11.5px; padding: 3px 9px 3px 7px; }
  .clock { font-size: 11.5px; }
  .live-indicator span[aria-hidden="true"] { display: none; }
  .rail-link span:not(.rail-badge) { font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}