/* supplementary.css — styles for the interactive sections of the project page.
 * Extends the design tokens declared in index.html (slate palette, cards,
 * system font, light scheme). It never redefines them.
 * Served as a classic stylesheet with a relative href; no @import, no webfonts.
 */

:root {
  --arm-pow3r: var(--fig-depth);
  --arm-mast3r: var(--fig-opt);
  --arm-gt: #ffe27a;   /* ground truth: warm light yellow, see map-viewer.js */
  --arm-c: #3f7d58;     /* muted green  */
  --arm-d: #7c5aa6;     /* muted purple */
  --arm-e: #9a3b4b;     /* muted red    */
  --arm-f: #7a7f46;     /* muted olive  */
  --ps-stage-bg: #0b1220;
}

/* ---------- On this page (sticky nav) ---------- */

.page-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  margin: 0 0 2rem;
  background: rgba(241, 245, 249, 0.92);
  backdrop-filter: saturate(140%) blur(6px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem 0.9rem;
}
.page-nav summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  list-style: none;
  padding: 0.25rem 0;
}
.page-nav summary::-webkit-details-marker { display: none; }
.page-nav summary::after { content: " ▾"; }
.page-nav[open] summary::after { content: " ▴"; }
.page-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1.1rem;
  list-style: none;
  padding: 0.4rem 0 0.2rem;
}
.page-nav a { font-size: 0.88rem; font-weight: 500; }

/* On a wide screen the list sits on the same row as its label, so the sticky
   bar stays one line tall. */
@media (min-width: 801px) {
  .page-nav { display: flex; align-items: center; gap: 0.2rem 1rem; padding: 0.4rem 0.9rem; }
  .page-nav summary { flex: 0 0 auto; padding: 0; }
  .page-nav ul { flex: 1 1 auto; padding: 0; gap: 0.2rem 1rem; }
}

/* The sticky "On this page" bar must not cover the heading an anchor jumps to.
   index.html sets scroll-margin-top on .card; this raises it to clear the bar. */
.card, .hero { scroll-margin-top: 5.5rem; }
@media (max-width: 800px) { .card, .hero { scroll-margin-top: 4rem; } }

/* ---------- shared controls ---------- */

.ps-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.75rem 1.1rem;
  padding: 0.85rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 1rem;
}
.ps-field { display: flex; flex-direction: column; gap: 0.25rem; min-width: 0; }
.ps-field > span,
.ps-field > label {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.ps-field select,
.ps-field input[type="range"] { max-width: 100%; }

.ps-toolbar select {
  font: inherit;
  font-size: 0.9rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.5rem;
  max-width: 15rem;
}

.ps-btn {
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-body);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.42rem 0.8rem;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.ps-btn:hover { border-color: var(--primary); color: var(--primary); }
.ps-btn[aria-pressed="true"],
.ps-btn.is-active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.ps-btn[disabled] { opacity: 0.5; cursor: default; }

.ps-segmented { display: inline-flex; gap: 0; }
.ps-segmented .ps-btn { border-radius: 0; margin-left: -1px; }
.ps-segmented .ps-btn:first-child { border-radius: 6px 0 0 6px; margin-left: 0; }
.ps-segmented .ps-btn:last-child { border-radius: 0 6px 6px 0; }

.ps-checks { display: flex; flex-wrap: wrap; gap: 0.35rem 0.9rem; }
.ps-check {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--text-body);
  cursor: pointer;
  white-space: nowrap;
}
.ps-check input { accent-color: var(--primary); }

.ps-btnrow { display: flex; flex-wrap: wrap; gap: 0.4rem; }

/* ---------- split stage + divider (shared by map and depth) ---------- */

.ps-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  background: var(--ps-stage-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  touch-action: none;
  contain: paint;
}
.ps-stage canvas { display: block; width: 100%; height: 100%; }

.ps-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  margin-left: -1px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.45);
  cursor: col-resize;
  touch-action: none;
  z-index: 3;
}
.ps-divider::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 2.1rem;
  height: 2.1rem;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.45);
}
.ps-divider::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.85rem;
  height: 0.85rem;
  transform: translate(-50%, -50%);
  z-index: 1;
  background:
    linear-gradient(to right, transparent 0 2px, var(--primary) 2px 3px, transparent 3px 5px,
                    transparent 5px 9px, var(--primary) 9px 10px, transparent 10px);
}
.ps-divider:focus-visible { outline: 3px solid var(--primary); outline-offset: 1px; }

/* ---------- map explorer ---------- */

.ps-map-stagewrap { position: relative; }

.ps-map-panes {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem 0.6rem;
  pointer-events: none;
  z-index: 2;
}
.ps-pane-label {
  max-width: 48%;
  padding: 0.35rem 0.55rem;
  border-radius: 6px;
  background: rgba(15, 23, 42, 0.62);
  color: #f8fafc;
  font-size: 0.76rem;
  line-height: 1.35;
}
.ps-pane-label .ps-arm {
  display: block;
  font-weight: 700;
  font-size: 0.86rem;
}
.ps-pane-label .ps-gate { display: block; color: #cbd5e1; }
.ps-pane-label .ps-metrics { display: block; color: #e2e8f0; font-variant-numeric: tabular-nums; }
.ps-pane-label.ps-arm-pow3r .ps-arm { color: #8ec5f0; }
.ps-pane-label.ps-arm-mast3r .ps-arm { color: #f0b877; }

.ps-overlay {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 1rem;
  text-align: center;
  background: rgba(11, 18, 32, 0.86);
  color: #e2e8f0;
  font-size: 0.9rem;
}
.ps-overlay[hidden] { display: none; }
.ps-overlay .ps-bar {
  width: min(16rem, 70%);
  height: 4px;
  border-radius: 2px;
  background: rgba(226, 232, 240, 0.25);
  overflow: hidden;
}
.ps-overlay .ps-bar i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--fig-depth);
  transition: width 0.12s linear;
}
.ps-overlay .ps-btn { background: transparent; color: #e2e8f0; border-color: #64748b; }
.ps-overlay .ps-btn:hover { background: #e2e8f0; color: var(--text); }

.ps-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1rem;
  margin-top: 0.7rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.ps-legend span { display: inline-flex; align-items: center; gap: 0.35rem; }
.ps-legend i {
  width: 1.4rem;
  height: 0;
  border-top-width: 3px;
  border-top-style: solid;
  border-radius: 2px;
}
/* The ground-truth line is bright, so its swatch carries the stage colour
   behind it, exactly as the line is drawn: light dashes on the dark stage. */
.ps-legend i.ps-gt {
  width: 1.7rem;
  height: 0.75rem;
  border: 0;
  border-radius: 3px;
  background-color: var(--ps-stage-bg);
  background-image: repeating-linear-gradient(
    90deg, var(--arm-gt) 0 0.3rem, rgba(0, 0, 0, 0) 0.3rem 0.45rem);
  background-size: 100% 3px;
  background-position: center;
  background-repeat: no-repeat;
}

.ps-hint { margin-top: 0.7rem; font-size: 0.82rem; color: var(--text-muted); }
.ps-arm-notes {
  margin: 0 0 1rem;
  padding: 0.55rem 0.8rem;
  border-left: 3px solid var(--border);
  background: var(--bg);
  border-radius: 0 6px 6px 0;
}
.ps-arm-notes .ps-hint { margin-top: 0; }
.ps-arm-notes .ps-hint + .ps-hint { margin-top: 0.35rem; }
.ps-arm-notes b { color: var(--text-body); }
.ps-toolbar select option:disabled { color: var(--text-muted); }
.ps-hint.ps-error { color: #9a3b4b; }

/* ---------- depth explorer ---------- */

.ps-depth-groups { display: flex; flex-wrap: wrap; gap: 0.75rem 1.4rem; }
.ps-depth-group { display: flex; flex-direction: column; gap: 0.3rem; }
.ps-depth-group > span {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.ps-depth-group .ps-btnrow .ps-btn { font-size: 0.8rem; padding: 0.35rem 0.65rem; }

.ps-depth-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 13rem;
  gap: 1rem;
  align-items: start;
}
.ps-depth-stage {
  position: relative;
  width: 100%;
  background: #000;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  touch-action: none;
}
.ps-depth-stage img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
}
.ps-depth-stage img.ps-sensor { z-index: 2; }
.ps-side { display: flex; flex-direction: column; gap: 0.6rem; }
.ps-side figure { margin: 0; }
.ps-side figcaption { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.25rem; }
.ps-side img.ps-rgb { width: 100%; border-radius: 6px; border: 1px solid var(--border); }

.ps-colorbar {
  height: 0.75rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: linear-gradient(to right,
    #30123b 0%, #4145ab 12%, #4675ed 22%, #39a2fc 31%, #1bcfd4 41%,
    #24eca6 51%, #61fc6c 60%, #a4fc3b 68%, #d1e834 75%, #f3c53a 82%,
    #fe9b2d 88%, #f36315 93%, #d93806 97%, #7a0403 100%);
}
.ps-colorbar-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  margin-top: 0.15rem;
}
.ps-swatch-invalid {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  color: var(--text-muted);
}
.ps-swatch-invalid i {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 2px;
  background: #000;
  border: 1px solid var(--border);
}

.ps-readout {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.6rem;
  margin-top: 0.8rem;
  font-size: 0.85rem;
  color: var(--text-body);
}
.ps-readout b { color: var(--text); font-variant-numeric: tabular-nums; }
.ps-readout .ps-readout-note { color: var(--text-muted); font-size: 0.8rem; }

.ps-pane-tags {
  position: absolute;
  inset: 0 0 auto 0;
  display: flex;
  justify-content: space-between;
  padding: 0.4rem 0.55rem;
  pointer-events: none;
  z-index: 3;
  font-size: 0.76rem;
  color: #f8fafc;
}
.ps-pane-tags span {
  background: rgba(15, 23, 42, 0.62);
  border-radius: 5px;
  padding: 0.2rem 0.45rem;
}

/* ---------- video gallery ---------- */

.ps-video-tabs { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1.2rem; }

/* One collapsible header per group of clips, styled like the page's other
   <details> (the "On this page" bar): a quiet uppercase label and a chevron. */
.ps-video-set {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}
.ps-video-set > summary {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  cursor: pointer;
  list-style: none;
  padding: 0.55rem 0.8rem;
  border-radius: 8px;
}
.ps-video-set > summary::-webkit-details-marker { display: none; }
.ps-video-set > summary::after { content: "▾"; margin-left: auto; color: var(--text-muted); }
.ps-video-set[open] > summary::after { content: "▴"; }
.ps-video-set[open] > summary { border-bottom: 1px solid var(--border); border-radius: 8px 8px 0 0; }
.ps-video-set > summary:hover .ps-video-setname { color: var(--primary); }
.ps-video-setname {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text);
}
.ps-video-setcount { font-size: 0.75rem; color: var(--text-muted); }
.ps-video-set .ps-btnrow { padding: 0.65rem 0.8rem 0.75rem; }
.ps-video-set .ps-btn { font-size: 0.82rem; }

.ps-video-stage {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
}
.ps-video-stage video { display: block; width: 100%; height: 100%; object-fit: contain; }
.ps-video-poster {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  padding: 0;
  background: #000;
  cursor: pointer;
}
.ps-video-poster[hidden] { display: none; }
.ps-video-poster img { width: 100%; height: 100%; object-fit: contain; }
.ps-video-poster .ps-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.15rem;
  border-radius: 99px;
  background: rgba(15, 23, 42, 0.78);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
}
.ps-video-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1.2rem;
  margin-top: 0.8rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.ps-video-caption { margin-top: 0.7rem; font-size: 0.9rem; color: var(--text-body); }

/* ---------- misc ---------- */

.ps-arm-notes[hidden] { display: none; }

.ps-empty {
  padding: 1rem;
  border: 1px dashed var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 0.88rem;
}
.ps-sr {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- responsive ---------- */

@media (max-width: 800px) {
  .ps-stage { aspect-ratio: 4 / 3; }
  .ps-toolbar { gap: 0.6rem 0.9rem; padding: 0.7rem; }
  .ps-toolbar select { max-width: 100%; width: 100%; }
  .ps-field { flex: 1 1 10rem; }
  .ps-depth-layout { grid-template-columns: minmax(0, 1fr); }
  .ps-side { flex-direction: row; flex-wrap: wrap; align-items: flex-end; }
  .ps-side figure { flex: 0 0 8rem; }
  .ps-side .ps-colorbar-wrap { flex: 1 1 10rem; }
  .ps-video-set > summary { padding: 0.5rem 0.65rem; }
  .ps-video-set .ps-btnrow { padding: 0.55rem 0.65rem 0.65rem; }
  .ps-video-set .ps-btn { font-size: 0.8rem; }
  .page-nav ul { flex-direction: column; gap: 0.15rem; }
  /* On a phone the two labels would cover most of a 4:3 stage, so they move
     out from over the canvas and sit under it as two columns. */
  .ps-map-panes { position: static; padding: 0.5rem 0; gap: 0.4rem; }
  .ps-pane-label {
    flex: 1 1 0;
    max-width: none;
    background: var(--bg);
    color: var(--text-body);
    font-size: 0.72rem;
  }
  .ps-pane-label .ps-gate { color: var(--text-muted); }
  .ps-pane-label .ps-metrics { color: var(--text-body); }
  .ps-pane-label.ps-arm-pow3r .ps-arm { color: var(--fig-depth); }
  .ps-pane-label.ps-arm-mast3r .ps-arm { color: var(--fig-opt); }
}

@media (prefers-reduced-motion: reduce) {
  .ps-overlay .ps-bar i { transition: none; }
  .ps-btn { transition: none; }
}