/* ═══════════════════════════════════════════════════════════════════
   SPRP Traffic Operations Console — dark control-room theme
   Deliberate single dark look (ITS/ATMS operations-center aesthetic).
   Status colors follow the validated status palette on the dark surface;
   a status NEVER appears as color alone — always icon + text label.
   ═══════════════════════════════════════════════════════════════════ */

:root {
  color-scheme: dark;

  /* surfaces */
  --bg-page:    #101312;
  --surface-1:  #1a1a19;   /* validated dark chart surface */
  --surface-2:  #202221;
  --surface-3:  #262927;
  --line:       #34383675;
  --line-strong:#3f4441;

  /* ink */
  --text-primary:   #f2f2ee;
  --text-secondary: #c3c2b7;
  --text-muted:     #8a8a80;

  /* accent (series-1 dark step) */
  --accent:       #3987e5;
  --accent-dim:   #3987e52a;

  /* status palette (validated on the dark surface) */
  --st-good:      #0ca30c;
  --st-warn:      #fab219;
  --st-serious:   #ec835a;
  --st-critical:  #d03b3b;
  /* platform-specific informational states (distinct from status palette) */
  --st-decision:  #9085e9;   /* violet — RESEARCHER_DECISION_REQUIRED */
  --st-source:    #d55181;   /* magenta — SCIENTIFIC_SOURCE_REQUIRED */
  --st-neutral:   #8a8a80;   /* gray — NOT_VERIFIED / N.A. */
  --st-nodata:    #6d6d64;   /* dim gray — NO_DATA */

  --mono: "SF Mono", "Cascadia Mono", Consolas, ui-monospace, "Courier New", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg-page);
  color: var(--text-primary);
  font-family: "Segoe UI", Tahoma, system-ui, -apple-system, "Noto Kufi Arabic", sans-serif;
  font-size: 14px;
  line-height: 1.55;
}

.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─────────── top system bar ─────────── */
.sysbar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 10px 20px;
  background: linear-gradient(180deg, #171a19, #131615);
  border-bottom: 1px solid var(--line-strong);
}
.sysbar-right { display: flex; align-items: center; gap: 12px; min-width: 0; }
.sys-logo {
  width: 40px; height: 40px; border-radius: 8px; flex: 0 0 auto;
  background: #0d47a1; color: #fff;
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 22px; font-weight: 700;
  box-shadow: 0 0 0 1px #ffffff1f inset;
}
.sys-name {
  font-family: var(--mono); font-size: 13px; letter-spacing: .12em;
  color: var(--text-primary); white-space: nowrap;
}
.sys-ver { color: var(--text-muted); letter-spacing: .05em; }
.sys-name-ar { font-size: 12px; color: var(--text-secondary); }

.sysbar-left { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.sys-cell { display: flex; flex-direction: column; align-items: flex-start; gap: 1px; }
.sys-cell-label {
  font-family: var(--mono); font-size: 9px; letter-spacing: .18em;
  color: var(--text-muted);
}
.sys-cell-value { font-size: 13px; color: var(--text-primary); display: flex; align-items: center; gap: 6px; }
.sys-btn {
  font-family: var(--mono); font-size: 11px; letter-spacing: .1em;
  padding: 7px 12px; border: 1px solid var(--line-strong); border-radius: 6px;
  color: var(--text-secondary); background: var(--surface-2);
}
.sys-btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

/* LEDs */
.led { width: 9px; height: 9px; border-radius: 50%; display: inline-block; flex: 0 0 auto; }
.led-ok   { background: var(--st-good);     box-shadow: 0 0 6px var(--st-good); }
.led-err  { background: var(--st-critical); box-shadow: 0 0 6px var(--st-critical); }
.led-off  { background: var(--st-neutral); }

/* ─────────── principle strip ─────────── */
.principle-strip {
  display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
  padding: 8px 20px;
  background: var(--accent-dim);
  border-bottom: 1px solid var(--line);
  font-size: 12.5px;
}
.pr-tag {
  font-family: var(--mono); font-size: 10px; letter-spacing: .18em;
  color: var(--accent); border: 1px solid var(--accent); border-radius: 4px;
  padding: 1px 7px;
}
.pr-text { font-family: var(--mono); letter-spacing: .04em; color: var(--text-primary); }
.pr-ar { color: var(--text-secondary); }

/* ─────────── tabs ─────────── */
.tabs {
  display: flex; gap: 4px; padding: 0 16px;
  background: var(--surface-1);
  border-bottom: 1px solid var(--line-strong);
  overflow-x: auto;
}
.tab {
  appearance: none; background: none; border: none; cursor: pointer;
  padding: 10px 16px 8px;
  border-bottom: 2px solid transparent;
  display: flex; flex-direction: column; align-items: center; gap: 1px;
  color: var(--text-muted);
}
.tab-en { font-family: var(--mono); font-size: 11px; letter-spacing: .14em; }
.tab-ar { font-size: 12px; }
.tab:hover { color: var(--text-secondary); }
.tab.active { color: var(--text-primary); border-bottom-color: var(--accent); }
.tab.active .tab-en { color: var(--accent); }

/* ─────────── layout ─────────── */
main { max-width: 1280px; margin: 0 auto; padding: 20px 20px 48px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.panel-head {
  display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
  margin: 26px 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
}
.tab-panel .panel-head:first-child { margin-top: 6px; }
.ph-en { font-family: var(--mono); font-size: 12px; letter-spacing: .16em; color: var(--accent); }
.ph-ar { font-size: 15px; font-weight: 600; color: var(--text-primary); }
.ph-count { font-size: 12px; color: var(--text-muted); }
.lead { color: var(--text-secondary); margin: 0 0 14px; max-width: 900px; }

.panel {
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
}
.panel-title {
  font-family: var(--mono); font-size: 11px; letter-spacing: .14em;
  color: var(--text-secondary); margin-bottom: 10px;
}
.pt-ar { font-family: inherit; letter-spacing: 0; font-size: 12px; color: var(--text-muted); margin-inline-start: 8px; }

/* ─────────── stat tiles ─────────── */
.tiles {
  display: grid; gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
}
.tile {
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px 10px;
  position: relative;
  overflow: hidden;
}
.tile::before {
  content: ""; position: absolute; inset-inline-start: 0; top: 0; bottom: 0;
  width: 3px; background: var(--tile-accent, var(--st-neutral));
}
.tile-label { font-family: var(--mono); font-size: 9.5px; letter-spacing: .14em; color: var(--text-muted); }
.tile-label-ar { font-size: 12px; color: var(--text-secondary); margin-top: 1px; }
.tile-value {
  font-family: var(--mono); font-variant-numeric: tabular-nums;
  font-size: 30px; font-weight: 600; line-height: 1.15; margin-top: 4px;
  color: var(--text-primary);
}
.tile-note { font-size: 11px; color: var(--text-muted); margin-top: 2px; }

/* ─────────── status board ─────────── */
.status-grid {
  display: grid; gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.status-card {
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  display: flex; flex-direction: column; gap: 8px;
}
.sc-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.sc-name { display: flex; flex-direction: column; }
.sc-name-en { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; color: var(--text-secondary); }
.sc-name-ar { font-size: 13.5px; font-weight: 600; color: var(--text-primary); }
.sc-note { font-size: 11.5px; color: var(--text-muted); border-top: 1px dashed var(--line); padding-top: 7px; }

/* ─────────── status badges (icon + text, never color alone) ─────────── */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .06em;
  padding: 3px 9px; border-radius: 999px;
  border: 1px solid; white-space: nowrap;
  background: transparent;
}
.b-ic { font-size: 11px; }
.st-pass      { color: #4fd24f; border-color: var(--st-good);     background: #0ca30c1a; }
.st-warn      { color: var(--st-warn);     border-color: var(--st-warn);     background: #fab2191a; }
.st-serious   { color: var(--st-serious);  border-color: var(--st-serious);  background: #ec835a1a; }
.st-fail      { color: #ef7070; border-color: var(--st-critical); background: #d03b3b22; }
.st-decision  { color: var(--st-decision); border-color: var(--st-decision); background: #9085e91a; }
.st-source    { color: var(--st-source);   border-color: var(--st-source);   background: #d551811a; }
.st-neutral   { color: var(--text-secondary); border-color: var(--st-neutral); background: #8a8a8014; }
.st-nodata    { color: var(--text-muted); border-color: var(--st-nodata); border-style: dashed; }

/* ─────────── experimental matrix ─────────── */
.matrix-wrap {
  display: grid; gap: 12px;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  align-items: start;
}
@media (max-width: 900px) { .matrix-wrap { grid-template-columns: 1fr; } }

.matrix-table { width: 100%; border-collapse: separate; border-spacing: 6px; }
.matrix-table th {
  font-family: var(--mono); font-size: 10px; letter-spacing: .1em;
  color: var(--text-secondary); text-align: center; font-weight: 600;
  padding: 6px 4px; vertical-align: middle;
}
.matrix-table tbody th { text-align: start; max-width: 170px; }
.th-ar { display: block; font-family: inherit; letter-spacing: 0; font-size: 11px; color: var(--text-muted); font-weight: 400; }
.matrix-cell {
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 14px 10px;
  text-align: center;
}
.matrix-cell .mode-name {
  font-family: var(--mono); font-size: 13px; letter-spacing: .08em; font-weight: 700;
  color: var(--text-primary); display: block;
}
.matrix-cell .mode-state { margin-top: 6px; }
.matrix-cell.mode-observed  { box-shadow: inset 0 3px 0 #3987e5; }
.matrix-cell.mode-predicted { box-shadow: inset 0 3px 0 #9085e9; }

.comparisons { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.comparisons li {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 11.5px;
  background: var(--surface-2); border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 10px;
}
.cmp-vs { color: var(--text-muted); }
.cmp-why { font-family: inherit; font-size: 11.5px; color: var(--text-secondary); }
.footnote { font-size: 11.5px; color: var(--text-muted); margin: 12px 0 0; }

/* ─────────── pipeline ─────────── */
.pipeline { display: flex; flex-direction: column; gap: 0; max-width: 860px; }
.stage {
  display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 12px;
  position: relative;
}
.stage-rail { display: flex; flex-direction: column; align-items: center; }
.stage-dot {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--surface-3); border: 2px solid var(--accent);
  margin-top: 18px; flex: 0 0 auto;
}
.stage-line { width: 2px; flex: 1; background: var(--line-strong); }
.stage:last-child .stage-line { background: transparent; }
.stage-card {
  background: var(--surface-1); border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 14px; margin-bottom: 10px;
}
.stage-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.stage-name { font-family: var(--mono); font-size: 12.5px; letter-spacing: .1em; font-weight: 700; color: var(--text-primary); }
.stage-purpose { color: var(--text-secondary); font-size: 12.5px; margin-top: 4px; }
.stage-meta {
  display: flex; gap: 14px; flex-wrap: wrap; margin-top: 8px;
  font-family: var(--mono); font-size: 10.5px; color: var(--text-muted);
}
.stage-meta b { color: var(--text-secondary); font-weight: 500; }

/* ─────────── tables ─────────── */
.table-scroll { overflow-x: auto; padding: 0; }
.data-table { width: 100%; border-collapse: collapse; min-width: 640px; }
.data-table th {
  font-family: var(--mono); font-size: 10px; letter-spacing: .12em;
  color: var(--text-muted); text-align: start; font-weight: 600;
  padding: 10px 12px; border-bottom: 1px solid var(--line-strong);
  background: var(--surface-2);
  position: sticky; top: 0;
}
.data-table td {
  padding: 9px 12px; border-bottom: 1px solid var(--line);
  color: var(--text-secondary); font-size: 12.5px; vertical-align: top;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table .id-cell { font-family: var(--mono); font-size: 11.5px; color: var(--accent); white-space: nowrap; }
.data-table .title-cell { color: var(--text-primary); }
.row-click { cursor: pointer; }
.row-click:hover td { background: #ffffff06; }
.detail-row td {
  background: var(--surface-2); color: var(--text-secondary);
  font-size: 12px; padding: 10px 16px;
  border-inline-start: 2px solid var(--accent);
}
.modules { font-family: var(--mono); font-size: 10.5px; color: var(--text-muted); }
.citation-empty { color: var(--text-muted); font-style: italic; }

/* ─────────── empty states ─────────── */
.empty-state {
  border: 1px dashed var(--line-strong); border-radius: 10px;
  background: var(--surface-1);
  padding: 22px 18px; text-align: center; color: var(--text-muted);
}
.empty-state .badge { margin-bottom: 8px; }
.empty-state p { margin: 6px 0 0; font-size: 12.5px; }
.empty-state code {
  font-family: var(--mono); font-size: 11.5px; color: var(--text-secondary);
  background: var(--surface-3); padding: 2px 7px; border-radius: 5px;
  direction: ltr; display: inline-block;
}

/* ─────────── misc ─────────── */
.error-box {
  background: #d03b3b22; border: 1px solid var(--st-critical);
  color: #ef9a9a; border-radius: 10px; padding: 12px 16px; margin-bottom: 16px;
  font-family: var(--mono); font-size: 12px;
}
footer {
  border-top: 1px solid var(--line);
  padding: 14px 20px 26px; text-align: center;
  color: var(--text-muted); font-size: 11.5px;
}
footer .mono { letter-spacing: .12em; font-size: 10px; color: var(--text-secondary); }