/* The Instrument — visual language (STEP 4). Near-black, one colour per category (M3), no
 * violet anywhere (decision B), dashed muted outline for MODELLED content (no category colour
 * of its own). Built on the vendored tokens.css — see that file's header for provenance. */

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--plane-0);
  color: var(--text-0);
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

.instrument-panel {
  border: 1px solid var(--border-default);
  border-radius: 10px;
  padding: 20px 24px 28px;
  background: var(--surface-1);
}

/* MODELLED: muted dashed outline, no fill of its own colour (decision B) — a caveat, not a
 * category. Applied to any panel whose content is simulated, distinct from a plain panel. */
.instrument-panel.is-modelled {
  border-style: dashed;
  border-color: var(--color-noc-modelled-outline);
  background: var(--color-noc-modelled-soft);
}

.panel-header {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-2);
  margin: 0 0 4px;
}

.panel-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-0);
  margin: 4px 0 20px;
}

/* ---- Timeline ---- */

#timeline-root {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Legibility pass: the window band's own label and every mark label were near-illegible at
   1440 (10-10.5px SVG text rendering close to 1:1 against the viewBox). Sized up across the
   board — this is the hero visual on the page, it should be readable without leaning in. */
.tl-window-label { fill: var(--text-1); font-size: 12px; }
.tl-window-label-main { fill: var(--text-0); font-size: 14px; font-weight: 650; }
.tl-window-label-n { fill: var(--text-2); font-size: 12px; font-weight: 500; }
p.tl-window-label-main { margin: 0 0 12px; color: var(--text-0); }
p.tl-window-label-main.tl-inverted { color: #e0a3a3; }

.tl-mark-time { fill: var(--text-0); font-size: 13px; font-weight: 650; }
.tl-mark-name { font-size: 12px; }
.tl-break-label { fill: var(--text-1); font-size: 10.5px; font-weight: 600; }
.tl-tail-label { font-size: 10px; font-weight: 600; opacity: 0.85; }
/* CSS text-anchor overrides the SVG presentation attribute, so orientation-specific alignment
   needs its own classes rather than relying on the element's own text-anchor="..." attribute. */
.tl-anchor-middle { text-anchor: middle; }
.tl-anchor-start { text-anchor: start; }

.tl-seed-tick { cursor: pointer; }

.tl-legend {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 11px;
  color: var(--text-1);
  margin-top: 6px;
}
.tl-legend-item { display: inline-flex; align-items: center; gap: 6px; }
.tl-legend-swatch { display: inline-block; width: 10px; height: 10px; flex-shrink: 0; }
.tl-shape-circle { border-radius: 50%; }
.tl-shape-square { border-radius: 2px; }
.tl-shape-diamond { transform: rotate(45deg); border-radius: 1px; }

.tl-absence-note {
  border-top: 1px solid var(--border-recessed);
  margin-top: 10px;
  padding-top: 10px;
  font-size: 11.5px;
  color: var(--text-2);
}
.tl-absence-note p { margin: 2px 0; }

.tl-table-details { margin-top: 14px; }
.tl-table-details summary {
  cursor: pointer;
  font-size: 11px;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.tl-table-scroll { overflow-x: auto; margin-top: 10px; }
.tl-table { width: 100%; min-width: 420px; border-collapse: collapse; font-size: 12.5px; }
.tl-table caption { text-align: left; color: var(--text-2); font-size: 11px; margin-bottom: 6px; }
.tl-table th, .tl-table td { text-align: left; padding: 5px 8px; border-bottom: 1px solid var(--border-recessed); }
.tl-table thead th { color: var(--text-2); font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em; }
.tl-table-window { font-size: 12px; color: var(--text-1); margin-top: 8px; }

.tl-error-state { color: #e0a3a3; font-size: 13px; }
.tl-empty-state { color: var(--text-2); font-size: 13px; font-style: italic; }

/* Keyboard focus (STEP 9 S2) */
:focus-visible {
  outline: 2px solid var(--color-noc-decision);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

@media (max-width: 640px) {
  .instrument-panel { padding: 16px; }
}

/* ==================================================================================
   Page layout
   ================================================================================== */

#instrument-root { min-height: 100vh; }

.instrument-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border-default);
  background: color-mix(in srgb, var(--plane-0) 88%, transparent);
  backdrop-filter: blur(8px);
}
.header-left { display: flex; align-items: center; gap: 10px; }
.header-wordmark { font-size: 0.95rem; font-weight: 650; color: var(--text-0); margin: 0; }
.header-modelled-badge {
  font-family: ui-monospace, monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-1);
  border: 1px dashed var(--color-noc-modelled-outline);
  background: var(--color-noc-modelled-soft);
  padding: 2px 7px;
  border-radius: 4px;
}
.header-right { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.header-domain-toggle { display: inline-flex; border: 1px solid var(--border-default); border-radius: 7px; overflow: hidden; }
.header-domain-btn {
  font-family: ui-monospace, monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-2);
  background: transparent;
  border: none;
  padding: 7px 12px;
  cursor: pointer;
}
.header-domain-btn.is-selected { background: var(--surface-2); color: var(--text-0); }
.header-domain-btn + .header-domain-btn { border-left: 1px solid var(--border-default); }
.header-scenario-select {
  font-size: 12.5px;
  color: var(--text-0);
  background: var(--surface-1);
  border: 1px solid var(--border-default);
  border-radius: 6px;
  padding: 6px 10px;
}

.instrument-body {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 28px;
  max-width: 1240px;
  margin: 0 auto;
  padding: 24px 24px 80px;
  align-items: start;
}
.rail-sticky { position: sticky; top: 68px; }
.instrument-main { display: flex; flex-direction: column; gap: 56px; min-width: 0; }

@media (max-width: 900px) {
  .instrument-body { grid-template-columns: 1fr; }
  .rail-sticky {
    position: static;
    order: -1;
  }
}

/* ==================================================================================
   Rail
   ================================================================================== */

.rail-sticky .instrument-panel,
#comparator-rail {
  border: 1px solid var(--border-default);
  border-radius: 10px;
  padding: 18px;
  background: var(--surface-1);
}
.rail-heading {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-2);
  margin: 0 0 6px;
}
.rail-note { font-size: 11px; color: var(--text-2); line-height: 1.5; margin: 0 0 16px; }
.rail-group { border: none; padding: 0; margin: 0 0 16px; }
.rail-group legend { font-size: 11px; color: var(--text-1); font-weight: 600; padding: 0 0 6px; }
.rail-btn-row { display: flex; flex-wrap: wrap; gap: 6px; }
.rail-btn {
  font-family: ui-monospace, monospace;
  font-size: 11.5px;
  color: var(--text-1);
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: 5px;
  padding: 5px 9px;
  cursor: pointer;
  font-variant-numeric: tabular-nums;
}
.rail-btn.is-default-value { border-color: var(--border-strong); }
.rail-btn.is-selected { background: color-mix(in srgb, var(--color-noc-decision) 16%, transparent); border-color: var(--color-noc-decision); color: var(--text-0); }
.rail-preset-row { display: flex; flex-direction: column; gap: 8px; margin-top: 4px; padding-top: 14px; border-top: 1px solid var(--border-recessed); }
.rail-preset-btn {
  font-size: 12px;
  color: var(--text-1);
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: 6px;
  padding: 7px 10px;
  cursor: pointer;
  text-align: left;
}
.rail-preset-btn.is-selected { border-color: var(--color-noc-decision); color: var(--text-0); }
.rail-preset-degenerate.is-selected { border-color: #c76b6b; color: var(--text-0); }
.rail-current { font-size: 11px; color: var(--text-2); margin: 12px 0 0; font-family: ui-monospace, monospace; }

/* ==================================================================================
   Acts, shared
   ================================================================================== */

.act-eyebrow { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.12em; color: var(--text-2); margin: 0 0 6px; }
.act-title { font-size: 1.5rem; font-weight: 650; color: var(--text-0); margin: 0 0 14px; text-wrap: balance; }
.act-subtitle { font-size: 1rem; font-weight: 650; color: var(--text-0); margin: 24px 0 6px; }
.act-copy { font-size: 0.96rem; color: var(--text-1); max-width: 68ch; line-height: 1.6; margin: 0 0 20px; }
.act-copy-small { font-size: 0.86rem; color: var(--text-2); max-width: 68ch; line-height: 1.5; margin: 0 0 14px; }

/* ==================================================================================
   Sensitivity curve
   ================================================================================== */

.sc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 12px; }
@media (max-width: 720px) { .sc-grid { grid-template-columns: 1fr; } }
.sc-axis-label { fill: var(--text-2); font-size: 9px; }
.sc-axis-title { fill: var(--text-2); font-size: 9.5px; }
.sc-legend { display: flex; gap: 14px; margin-top: 8px; font-size: 10.5px; color: var(--text-1); }
.sc-legend-item { display: inline-flex; align-items: center; gap: 5px; }
.sc-swatch { display: inline-block; width: 10px; height: 10px; }
.sc-swatch-line { background: var(--color-noc-conventional); border-radius: 50%; }
.sc-swatch-diamond { background: var(--color-noc-decision); transform: rotate(45deg); }
.sc-caption { font-size: 11px; color: var(--text-2); margin-top: 8px; }
.sc-empty { color: var(--text-2); font-size: 12px; font-style: italic; }

/* ==================================================================================
   Dual-path diagram (Act III)
   ================================================================================== */

.dp-wrap { display: flex; flex-direction: column; gap: 18px; }
.dp-track-label { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-2); margin: 0 0 8px; }
.dp-steps { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.dp-step {
  font-size: 12.5px;
  color: var(--text-1);
  border: 1px solid var(--border-default);
  border-radius: 6px;
  padding: 6px 11px;
  white-space: nowrap;
}
.dp-step-conv { border-color: var(--color-noc-conventional); color: var(--text-0); }
.dp-step-layer { border-color: var(--color-noc-decision); color: var(--text-0); }
.dp-arrow { color: var(--text-2); font-size: 13px; }
.dp-outcome { font-size: 0.92rem; color: var(--text-1); line-height: 1.6; margin: 20px 0 0; padding-top: 16px; border-top: 1px solid var(--border-recessed); max-width: 70ch; }
.dp-aggregate { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border-recessed); }
.dp-aggregate-label { font-size: 12px; color: var(--text-2); margin: 0 0 6px; }
.dp-aggregate-rates { display: flex; gap: 20px; flex-wrap: wrap; font-size: 12.5px; color: var(--text-0); font-variant-numeric: tabular-nums; }
.dp-swatch { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 5px; }
.dp-swatch-conv { background: var(--color-noc-conventional); }
.dp-swatch-layer { background: var(--color-noc-decision); }

/* ==================================================================================
   Paired metric (Act IV)
   ================================================================================== */

.pm-block { margin-bottom: 22px; }
.pm-block:last-of-type { margin-bottom: 0; }
.pm-label { font-size: 0.92rem; font-weight: 650; color: var(--text-0); margin: 0 0 10px; }
.pm-bar-row { display: grid; grid-template-columns: 90px 1fr 150px; align-items: center; gap: 10px; margin-bottom: 6px; }
.pm-bar-name { font-size: 11.5px; color: var(--text-2); }
.pm-bar-track { height: 10px; background: var(--surface-2); border-radius: 5px; overflow: hidden; }
.pm-bar-fill { height: 100%; border-radius: 5px; }
.pm-bar-conv { background: var(--color-noc-conventional); }
.pm-bar-layer { background: var(--color-noc-decision); }
.pm-bar-value { font-size: 11.5px; color: var(--text-0); font-variant-numeric: tabular-nums; text-align: right; }
.act4-note { font-size: 0.88rem; color: var(--text-1); line-height: 1.6; margin: 18px 0 0; padding-top: 16px; border-top: 1px solid var(--border-recessed); max-width: 68ch; }
@media (max-width: 480px) {
  .pm-bar-row { grid-template-columns: 1fr; gap: 3px; }
  .pm-bar-value { text-align: left; }
}

/* ==================================================================================
   Domain comparison + topology (Act V)
   ================================================================================== */

.dc-table-scroll { overflow-x: auto; }
.dc-table { width: 100%; min-width: 280px; border-collapse: collapse; font-size: 12.5px; }
.dc-table th, .dc-table td { text-align: left; padding: 6px 10px; border-bottom: 1px solid var(--border-recessed); font-variant-numeric: tabular-nums; }
.dc-table thead th { color: var(--text-2); font-weight: 600; font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.04em; }
.dc-table tbody th { color: var(--text-1); font-weight: 500; }
.dc-notes { margin-top: 14px; }
.dc-notes p { font-size: 11.5px; color: var(--text-2); line-height: 1.5; margin: 4px 0; }

/* Cross-domain decision table (Act V lead section) */
.cdd-table tbody tr { cursor: help; }
.cdd-table tbody th { max-width: 220px; }
.cdd-pooled-cell { color: var(--text-0); }
.cdd-pooled-tag {
  font-family: ui-monospace, monospace;
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-noc-decision);
  border: 1px solid var(--color-noc-decision);
  border-radius: 3px;
  padding: 1px 5px;
  margin-right: 6px;
}
.cdd-provenance-details { margin-top: 12px; }
.cdd-provenance-details summary { cursor: pointer; font-size: 10.5px; color: var(--text-2); text-transform: uppercase; letter-spacing: 0.06em; }
.cdd-provenance-list { margin: 10px 0 0; font-size: 11px; }
.cdd-provenance-list dt { color: var(--text-0); font-weight: 600; margin-top: 8px; }
.cdd-provenance-list dt:first-child { margin-top: 0; }
.cdd-provenance-list dd { color: var(--text-2); margin: 2px 0 0; font-family: ui-monospace, monospace; font-size: 10.5px; }

.topo-details { margin-top: 16px; }
.topo-details summary { cursor: pointer; font-size: 11px; color: var(--text-2); text-transform: uppercase; letter-spacing: 0.08em; }
.topo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 14px; }
@media (max-width: 640px) { .topo-grid { grid-template-columns: 1fr; } }
.topo-col-label { font-size: 12px; font-weight: 650; color: var(--text-0); margin: 0 0 6px; }
.topo-desc { font-size: 12px; color: var(--text-1); line-height: 1.6; margin: 0; }

/* ==================================================================================
   Method drawer
   ================================================================================== */

.drawer-details { border: 1px solid var(--border-default); border-radius: 10px; padding: 18px 22px; background: var(--surface-1); }
.drawer-details summary { cursor: pointer; font-size: 0.95rem; font-weight: 650; color: var(--text-0); }
.drawer-banner { font-size: 12px; color: var(--text-1); background: var(--color-noc-modelled-soft); border: 1px dashed var(--color-noc-modelled-outline); border-radius: 6px; padding: 10px 14px; margin: 16px 0; line-height: 1.5; }
.drawer-method-note { font-size: 12.5px; color: var(--text-2); }
.drawer-method-note a { color: var(--color-noc-decision); }
.drawer-category { margin-top: 22px; }
.drawer-category h4 { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-2); margin: 0 0 8px; }
.drawer-category ol { margin: 0; padding-left: 20px; }
.drawer-category li { font-size: 12.5px; color: var(--text-1); line-height: 1.6; margin-bottom: 10px; }
.drawer-category li strong { color: var(--text-0); }

/* ==================================================================================
   Operational consequence view
   ================================================================================== */

.opview-chain { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.opview-step {
  font-family: ui-monospace, monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--text-1);
  border: 1px solid var(--border-default);
  border-radius: 5px;
  padding: 6px 10px;
}
.opview-step-branch { color: var(--text-0); border-color: var(--color-noc-modelled-outline); }
.opview-arrow { color: var(--text-2); font-size: 12px; }
.opview-branch-label { font-size: 12px; color: var(--text-2); margin: 18px 0 8px; }
.opview-note { font-size: 0.85rem; color: var(--text-2); line-height: 1.6; margin: 18px 0 0; padding-top: 14px; border-top: 1px solid var(--border-recessed); max-width: 68ch; }

/* ==================================================================================
   Loading / error / stale states (STEP 9 S1)
   ================================================================================== */

.skel-timeline { max-width: 920px; margin: 60px auto; padding: 0 24px; position: relative; height: 100px; }
.skel-track { position: absolute; top: 40px; left: 24px; right: 24px; height: 3px; background: var(--border-default); border-radius: 2px; }
.skel-mark { position: absolute; top: 34px; width: 14px; height: 14px; border-radius: 50%; background: var(--surface-2); border: 1px solid var(--border-default); animation: skel-pulse 1.6s ease-in-out infinite; }
@keyframes skel-pulse { 0%, 100% { opacity: 0.4; } 50% { opacity: 0.9; } }
@media (prefers-reduced-motion: reduce) { .skel-mark { animation: none; opacity: 0.6; } }

.load-error { max-width: 640px; margin: 80px auto; padding: 24px; border: 1px solid #c76b6b; border-radius: 10px; background: rgba(199,107,107,0.06); }
.load-error-title { font-size: 1rem; font-weight: 650; color: #e0a3a3; margin: 0 0 8px; }
.load-error-detail { font-size: 0.9rem; color: var(--text-1); margin: 0; }

.stale-banner { font-size: 11.5px; color: #d7b25f; background: rgba(215,178,95,0.08); border-bottom: 1px solid rgba(215,178,95,0.3); padding: 8px 24px; margin: 0; text-align: center; }