/* ──────────────────────────────────────────────────────────────────────────
 * site.css — paper-supplement style. Black canvas, academic typography,
 * stacked comparison sections.
 * ────────────────────────────────────────────────────────────────────────── */

:root {
  --bg:           #0a0a0a;
  --bg-elev:      #141414;
  --bg-elev-2:    #1c1c1c;
  --border:       #242424;
  --border-strong:#3a3a3a;
  --text:         #efefef;
  --text-muted:   #9a9a9a;
  --text-faint:   #5e5e5e;
  --accent:       #7aa7d9;
  --accent-strong:#9bbde6;
  --accent-dim:   rgba(122,167,217,0.18);
  --warn:         #d9a86b;
  --bad:          #d96e6e;
  --ok:           #6bcf9e;

  --font-serif: 'Charter', 'Sitka Text', 'Iowan Old Style', Cambria, Georgia, 'Times New Roman', serif;
  --font-sans:  -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono:  ui-monospace, SFMono-Regular, 'JetBrains Mono', Menlo, Consolas, monospace;

  --page-max:   1480px;
  --gutter:     32px;
  --radius:     6px;
  --radius-sm:  4px;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
[hidden] { display: none !important; }

html {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  background: var(--bg);
  overflow-x: hidden;
}

a { color: var(--accent); }
code { font-family: var(--font-mono); font-size: 0.9em; background: var(--bg-elev); padding: 1px 5px; border-radius: 3px; }
button { font: inherit; color: inherit; cursor: pointer; }

/* ── Page shell ─────────────────────────────────────────────────────── */
/* The page now spans the full viewport width so video panels can use all
   available horizontal space. Narrow blocks (paper-header, abstract,
   floating nav inner, footer) are constrained individually below. */
.page {
  max-width: none;
  width: 100%;
  margin: 0;
  padding: 48px var(--gutter) 96px;
}

/* Constrain text-heavy blocks to readable width while keeping the page
   full-bleed for video grids. */
.paper-header,
.abstract,
.paper-footer {
  max-width: var(--page-max);
  margin-left: auto;
  margin-right: auto;
}
.control-bar-inner {
  max-width: var(--page-max);
  margin-left: auto;
  margin-right: auto;
}

/* ── Title / abstract ───────────────────────────────────────────────── */
.paper-header {
  text-align: center;
  margin-bottom: 28px;
}
.paper-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(2.4rem, 4vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
  color: var(--text);
}
.paper-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0;
}

.abstract {
  max-width: 780px;
  margin: 0 auto 40px;
  text-align: center;
  color: var(--text-muted);
  font-size: 1.04rem;
  line-height: 1.65;
}
.abstract p { margin: 0 0 0.8em; }
.abstract-hint {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-top: 18px;
}
.abstract-hint::before { content: '↓  '; }
.abstract-hint::after  { content: '  ↓'; }

/* ── Control bar (display + global look) ────────────────────────────
 * Sticky-pinned floating nav. Holds: display SDR/HDR toggle, three look
 * sliders (pivot, contrast, saturation) inline, then reset + info. */
.control-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 56px;
  /* slight backdrop blur so the bar reads cleanly over panel content */
  backdrop-filter: saturate(140%) blur(6px);
  -webkit-backdrop-filter: saturate(140%) blur(6px);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.35);
}
.control-bar-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 22px;
  padding: 12px 18px;
}
.control-cell {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 32px;
}
.control-cell-grow { flex: 1 1 320px; min-width: 280px; }
.control-group {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 32px;
}
.control-group-grow { flex: 1; min-width: 0; }
.control-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  white-space: nowrap;
}
.control-readonly {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
}
.control-select {
  font: inherit;
  font-size: 0.86rem;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 5px 8px;
  min-width: 140px;
}
.control-select:hover { border-color: var(--border-strong); }
.control-select:focus { outline: 1px solid var(--accent); outline-offset: -1px; }

/* segmented SDR/HDR */
.seg {
  display: inline-flex;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px;
}
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 4px 14px;
  border-radius: 999px;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s, color 0.15s;
}
.seg input:checked + label {
  background: var(--accent);
  color: var(--bg);
}

/* exposure brackets */
.bracket-row {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.bracket-btn {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  background: var(--bg);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 9px;
  transition: all 0.12s;
}
.bracket-btn:hover { color: var(--text); border-color: var(--border-strong); }
.bracket-btn.active {
  background: var(--accent-dim);
  color: var(--accent-strong);
  border-color: var(--accent);
}

.ghost-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
}
.ghost-btn:hover { color: var(--text); border-color: var(--border-strong); }

.info-btn {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.info-btn:hover { color: var(--text); border-color: var(--accent); }

.primary-btn {
  background: var(--accent);
  color: var(--bg);
  border: 0;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.primary-btn:hover { background: var(--accent-strong); }

/* slider stack: 4 horizontal sliders across the full control-bar width */
.slider-stack {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  padding: 4px 0 4px;
  border-top: 1px solid var(--border);
  margin-top: 2px;
  padding-top: 14px;
}
.slider-row { display: flex; flex-direction: column; gap: 6px; }
.slider-row-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.slider-name {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.slider-value {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: transform 0.1s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
}

/* ── Comparison sections ────────────────────────────────────────────── */
.comp-section {
  margin-top: 84px;
  scroll-margin-top: 24px;
}
.section-h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 2rem;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--text);
}
.section-desc {
  color: var(--text-muted);
  margin: 0 0 26px;
  line-height: 1.6;
  font-size: 1.0rem;
}

/* tab toggles inside a section (e.g. dataset / exposure) */
.tab-row {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.tab-row-group {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.tab-row-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.pill-tabs {
  display: inline-flex;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
}
.pill-tab {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  padding: 5px 14px;
  border-radius: 999px;
  border: 0;
  background: transparent;
  letter-spacing: 0.04em;
}
.pill-tab.active {
  background: var(--accent);
  color: var(--bg);
}
.pill-tab:not(.active):hover { color: var(--text); }

/* thumbnail rail */
.thumb-rail-wrap {
  position: relative;
  margin-bottom: 20px;
}
.thumb-rail {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 2px 2px 16px;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}
.thumb-rail::-webkit-scrollbar { height: 8px; }
.thumb-rail::-webkit-scrollbar-track { background: transparent; }
.thumb-rail::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }

.thumb-card {
  flex: 0 0 auto;
  width: 160px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
  padding: 0;
  text-align: left;
}
.thumb-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
}
.thumb-card.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}
.thumb-card-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000 linear-gradient(135deg, #1a1a1a 25%, #232323 25%, #232323 50%, #1a1a1a 50%, #1a1a1a 75%, #232323 75%) 0 0 / 14px 14px;
  display: block;
  object-fit: cover;
}
.thumb-card-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
  padding: 7px 10px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.thumb-card.active .thumb-card-label { color: var(--accent-strong); }

/* method picker row above panels */
.method-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 10px;
}
.method-cell {
  display: flex;
  align-items: center;
  gap: 10px;
}
.method-cell-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  white-space: nowrap;
}
.method-select {
  flex: 1;
  font: inherit;
  font-size: 0.92rem;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
}
.method-select:hover { border-color: var(--border-strong); }

/* panel grid (2 video canvases side-by-side, full row width) */
.panel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}
.panel {
  position: relative;
  background: #000;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.panel canvas {
  display: block;
  max-width: 100%;
  max-height: 70vh;
}
.panel-overlay {
  position: absolute;
  top: 10px;
  left: 12px;
  background: rgba(0,0,0,0.55);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 4px 9px;
  border-radius: 3px;
  pointer-events: none;
  z-index: 3;
}
.panel-overlay-corner {
  /* Resolution badge (e.g. "1920×1080") was previously placed here. The
     published view hides it; we keep the rule scoped to display:none so
     setCornerInfo callers can still set the node's textContent for
     debugging without touching layout. */
  display: none;
}
.panel-loading::after {
  content: 'loading…';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  background: #000;
  z-index: 2;
}
.panel-error::after {
  content: attr(data-error);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--bad);
  background: #000;
  padding: 16px;
  text-align: center;
  z-index: 2;
}

/* hover-zoom magnifier lens (overlay on each panel) */
.zoom-lens {
  position: absolute;
  border: 1.5px solid rgba(255,255,255,0.7);
  width: 120px;
  height: 120px;
  pointer-events: none;
  transform: translate(-50%, -50%);
  display: none;
  z-index: 4;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.6);
}

/* playback bar */
.playback-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-top: 0;
  border-radius: 0 0 var(--radius) var(--radius);
  margin-top: -1px;
}
.playback-btn {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.playback-btn:hover { border-color: var(--accent); color: var(--accent-strong); }
.playback-frame {
  display: flex;
  align-items: baseline;
  gap: 8px;
  min-width: 80px;
}
.playback-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.frame-readout {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text);
}
.scrub {
  flex: 1;
}
.playback-fps {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.fps-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.fps-input {
  width: 50px;
  font: inherit;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px 6px;
  text-align: center;
}
.playback-status {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
  min-width: 90px;
  text-align: right;
}
/* Hide the resting "ready" state — it occupies space next to the
   display-mode toggle without conveying any information once a scene is
   loaded. Loading and error states still display.  We zero out min-width
   too so the playback bar doesn't reserve empty space. */
.playback-status[data-state="ready"] {
  display: none;
  min-width: 0;
}
.playback-status[data-state="loading"] { color: var(--warn); }
.playback-status[data-state="error"]   { color: var(--bad); }

/* hover-zoom drawer (collapsible side-by-side magnified view) */
.zoom-drawer {
  margin-top: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev);
  overflow: hidden;
}
.zoom-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  cursor: pointer;
  user-select: none;
  /* Distinct elevated band so it doesn't look like inert chrome. */
  background: var(--bg-elev-2);
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}
.zoom-drawer-head:hover { background: #232323; }
.zoom-drawer-head:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.zoom-drawer-title {
  font-family: var(--font-mono);
  font-size: 0.84rem;        /* up from 0.78rem */
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);        /* full brightness (was muted) */
}
.zoom-drawer-title::before {
  content: '▸';
  display: inline-block;
  margin-right: 10px;
  color: var(--accent-strong);
  font-size: 1.05em;          /* bigger chevron — clearer affordance */
  transition: transform 0.18s;
}
.zoom-drawer.open .zoom-drawer-title::before { transform: rotate(90deg); }
.zoom-drawer-controls { display: inline-flex; gap: 18px; align-items: center; }

/* Promoted zoom slider — bigger track + thumb + value readout so the
 * inspector's primary control reads as an interactive affordance instead
 * of UI chrome. The label stays compact but legible. */
.zoom-drawer-zoom-label {
  font-size: 0.78rem !important;
  font-weight: 700;
  color: var(--text);
}
.zoom-drawer-controls input[type="range"].zoom-drawer-zoom-range {
  width: 180px;
  height: 6px;
  background: var(--border-strong);
}
.zoom-drawer-controls input[type="range"].zoom-drawer-zoom-range::-webkit-slider-thumb {
  width: 18px;
  height: 18px;
  background: var(--accent-strong);
  box-shadow: 0 0 0 2px rgba(122, 167, 217, 0.25);
}
.zoom-drawer-controls input[type="range"].zoom-drawer-zoom-range::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--accent-strong);
  border: none;
}
.zoom-drawer-zoom-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-strong);
  min-width: 34px;
  text-align: right;
}

/* Show-box checkbox — toggles the lens overlay without affecting the
 * inspector itself. Default is enabled. */
.zoom-drawer-checkbox {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
  padding-left: 10px;
  border-left: 1px solid var(--border);
}
.zoom-drawer-checkbox input[type="checkbox"] {
  accent-color: var(--accent);
  width: 15px;
  height: 15px;
  margin: 0;
  cursor: pointer;
}
.zoom-drawer-checkbox:hover { color: var(--text); }
.zoom-drawer-body {
  display: none;
  border-top: 1px solid var(--border);
  background: #000;
}
.zoom-drawer.open .zoom-drawer-body { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); }
.zoom-panel {
  position: relative;
  background: #000;
  min-height: 260px;
  height: 320px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.zoom-panel canvas { display: block; width: 100%; height: 100%; }
.zoom-panel-label {
  position: absolute;
  top: 8px;
  left: 10px;
  background: rgba(0,0,0,0.55);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 3px 8px;
  border-radius: 3px;
  z-index: 2;
}
.zoom-empty {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-faint);
  font-style: italic;
}

/* ── Diagnostics popover ────────────────────────────────────────────── */
.info-popover {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.info-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 26px;
  width: min(460px, 92vw);
  max-height: 80vh;
  overflow: auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}
.info-card h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.1rem;
  margin: 0;
}
.info-card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }

.hdr-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--border);
  font-size: 0.74rem;
  margin-bottom: 12px;
}
.hdr-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-faint);
}
.hdr-badge[data-state="hdr"] .hdr-dot { background: var(--ok); }
.hdr-badge[data-state="sdr"] .hdr-dot { background: var(--warn); }
.hdr-hint {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  color: var(--text-muted);
  font-size: 0.78rem;
  line-height: 1.55;
}
.diag {
  border-top: 1px solid var(--border);
  padding-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  color: var(--text-muted);
}
.diag .diag-ok   { color: var(--ok); }
.diag .diag-warn { color: var(--warn); }
.diag .diag-bad  { color: var(--bad); }
.load-status {
  margin-top: 10px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ── Picker / fatal overlays ────────────────────────────────────────── */
.picker-overlay, .fatal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
}
.picker-card, .fatal-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 32px;
  width: min(520px, 92vw);
}
.picker-card h2, .fatal-card h2 {
  font-family: var(--font-serif);
  margin: 0 0 12px;
  font-size: 1.4rem;
}
.picker-card p, .fatal-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 0 0 10px;
}
.picker-error { color: var(--bad); }
.picker-alt { color: var(--text-faint); font-size: 0.82rem; margin-top: 16px; }
.fatal-hint { font-size: 0.82rem; color: var(--text-faint); }

/* ──────────────────────────────────────────────────────────────────────
 * Chrome requirement notice — large amber badge shown in the page header
 * and smaller inline variants in the picker/prompt overlays.
 * ────────────────────────────────────────────────────────────────────── */
.chrome-notice {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--warn);
  background: rgba(217, 168, 107, 0.1);
  border: 1px solid rgba(217, 168, 107, 0.45);
  border-radius: var(--radius);
  padding: 9px 22px;
  margin: 16px 0 0;
}

.picker-chrome-notice {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--warn);
  background: rgba(217, 168, 107, 0.08);
  border: 1px solid rgba(217, 168, 107, 0.3);
  border-radius: var(--radius-sm);
  padding: 7px 12px;
  margin: 14px 0 0;
  line-height: 1.45;
  text-align: center;
}

/* ── Footer ─────────────────────────────────────────────────────────── */
.paper-footer {
  margin-top: 100px;
  padding-top: 30px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
}

/* responsive */
@media (max-width: 900px) {
  .control-bar-inner { gap: 14px; }
  .panel-grid { grid-template-columns: 1fr; }
  .method-row { grid-template-columns: 1fr; }
  .slider-stack { grid-template-columns: 1fr 1fr; }
  .paper-title { font-size: 2.2rem; }
  .comp-controls { grid-template-columns: 1fr; }
  .link-toggle { justify-self: center; transform: rotate(90deg); }
}

/* ──────────────────────────────────────────────────────────────────────
 * Picker primary-button — make the inline <code> readable against the
 * accent background. Default `code` styling is bg-elev with default text,
 * which renders as black-on-black on the picker button. Override here.
 * ────────────────────────────────────────────────────────────────────── */
.primary-btn-code {
  background: rgba(0, 0, 0, 0.18);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 0.86em;
  padding: 1px 5px;
  border-radius: 3px;
}

/* ──────────────────────────────────────────────────────────────────────
 * Inline sliders (used in the floating nav: pivot / contrast / saturation)
 * ────────────────────────────────────────────────────────────────────── */
.inline-sliders {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  min-width: 0;
}
.inline-slider {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1 1 0;
  min-width: 180px;
}
.inline-slider .control-label { flex: 0 0 auto; }
.inline-slider-range { flex: 1 1 100px; min-width: 80px; }
.inline-slider .slider-value {
  flex: 0 0 auto;
  min-width: 36px;
  text-align: right;
}

/* ──────────────────────────────────────────────────────────────────────
 * Per-panel control row: two control blocks with a link toggle between.
 * Grid columns: 1fr [auto link] 1fr.
 * Each block stacks: method select / tone-mapper select / exposure
 * slider / bracket buttons.
 * ────────────────────────────────────────────────────────────────────── */
.comp-controls {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: stretch;
  gap: 16px;
  margin-bottom: 10px;
}
.panel-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
}
.pc-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.pc-row.pc-method,
.pc-row.pc-tone {
  flex-direction: row;
  align-items: center;
  gap: 10px;
}
.pc-row.pc-method .control-label,
.pc-row.pc-tone   .control-label { flex: 0 0 auto; min-width: 90px; }

.method-select,
.tone-select {
  flex: 1;
  font: inherit;
  font-size: 0.92rem;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
}
.method-select:hover,
.tone-select:hover { border-color: var(--border-strong); }
.tone-select:disabled,
.tone-select.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  border-style: dashed;
  color: var(--text-faint);
}

.panel-slider { display: flex; flex-direction: column; gap: 4px; }
.panel-slider-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.panel-slider-range { width: 100%; }

/* Link/chain toggle in the middle column. */
.link-toggle {
  align-self: center;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: 0.95rem;
  line-height: 1;
  transition: all 0.15s;
}
.link-toggle:hover { color: var(--text); border-color: var(--border-strong); }
.link-toggle.active {
  background: var(--accent-dim);
  color: var(--accent-strong);
  border-color: var(--accent);
}

/* ──────────────────────────────────────────────────────────────────────
 * Bracket-button rows inside the per-panel control blocks — slightly
 * tighter than the legacy global bracket row, centered so the full
 * ±4 EV range stays visually balanced. Force horizontal direction
 * here because the parent `.pc-row` class sets flex-direction: column
 * for every other control row, which would otherwise stack the EV
 * buttons vertically.
 * ────────────────────────────────────────────────────────────────────── */
.pc-brackets.bracket-row {
  flex-direction: row;
  gap: 4px;
  justify-content: center;
  align-items: center;
  flex-wrap: nowrap;
}
.pc-brackets .bracket-btn { padding: 3px 7px; font-size: 0.72rem; }

/* ──────────────────────────────────────────────────────────────────────
 * Link-toggle cell — wraps the chain button with a "Link" caption beneath
 * so reviewers immediately understand the affordance.
 * ────────────────────────────────────────────────────────────────────── */
.link-toggle-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  align-self: center;
}
.link-toggle-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  user-select: none;
}
.link-toggle-cell .link-toggle.active + .link-toggle-label {
  color: var(--accent-strong);
}

/* ──────────────────────────────────────────────────────────────────────
 * Comparison stage — panel-grid + scene prompt + playback bar. This is
 * the element we promote to fullscreen so all three pieces stay together.
 * In normal flow it behaves as a block; in fullscreen it becomes a flex
 * column that fills the viewport.
 * ────────────────────────────────────────────────────────────────────── */
.comp-stage {
  display: block;
  position: relative;
}

.comp-stage:fullscreen,
.comp-stage:-webkit-full-screen {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
  background: #000;
  padding: 0;
  margin: 0;
}
.comp-stage:fullscreen .panel-grid,
.comp-stage:-webkit-full-screen .panel-grid {
  flex: 1 1 auto;
  border-radius: 0;
  min-height: 0;
}
.comp-stage:fullscreen .panel-grid .panel canvas,
.comp-stage:-webkit-full-screen .panel-grid .panel canvas {
  max-width: 100%;
  max-height: 100%;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.comp-stage:fullscreen .playback-bar,
.comp-stage:-webkit-full-screen .playback-bar {
  border-radius: 0;
  margin-top: 0;
  flex: 0 0 auto;
}
.comp-stage:fullscreen .scene-prompt,
.comp-stage:-webkit-full-screen .scene-prompt {
  flex: 0 0 auto;
}

/* ──────────────────────────────────────────────────────────────────────
 * Split-screen slider display mode. data-display="side" keeps the
 * original 2-col grid; data-display="split" overlays both panels in the
 * same area and reveals the right one via a clip-path driven by the
 * --split-pos custom property.
 * ────────────────────────────────────────────────────────────────────── */
.panel-grid[data-display="side"]  .split-divider { display: none; }
.panel-grid[data-display="split"] {
  position: relative;
  grid-template-columns: 1fr;
  gap: 0;
}
.panel-grid[data-display="split"] > .panel {
  grid-column: 1;
  grid-row: 1;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
/* Left panel sits underneath; right panel is clipped to reveal only the
   region right of the divider. */
.panel-grid[data-display="split"] > .panel:nth-of-type(1) {
  z-index: 1;
}
.panel-grid[data-display="split"] > .panel:nth-of-type(2) {
  z-index: 2;
  clip-path: inset(0 0 0 var(--split-pos, 50%));
}
.panel-grid[data-display="split"] > .panel canvas {
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
/* Make sure split-mode panel-grid has a real height since the panels
   are absolutely positioned (and would collapse otherwise). */
.panel-grid[data-display="split"] {
  min-height: 60vh;
}
.comp-stage:fullscreen .panel-grid[data-display="split"],
.comp-stage:-webkit-full-screen .panel-grid[data-display="split"] {
  min-height: 0;
}

/* ──────────────────────────────────────────────────────────────────────
 * Split divider — vertical bar with a circular grip the user drags.
 * Only interactive in split mode (see [data-display] rules above).
 * ────────────────────────────────────────────────────────────────────── */
.split-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--split-pos, 50%);
  width: 2px;
  margin-left: -1px;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.45);
  cursor: ew-resize;
  z-index: 3;
  touch-action: none;
  user-select: none;
}
.split-divider-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 28px;
  height: 28px;
  margin: -14px 0 0 -14px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(0, 0, 0, 0.35);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}
.split-divider-handle::before,
.split-divider-handle::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  border: solid var(--bg);
  border-width: 0 0 0 2px;
}
.split-divider-handle::before { left: 6px;  transform: rotate(45deg); border-width: 2px 0 0 2px; }
.split-divider-handle::after  { right: 6px; transform: rotate(45deg); border-width: 0 2px 2px 0; }

/* ──────────────────────────────────────────────────────────────────────
 * Display-mode toggle (Side / Slider) inside the playback bar.
 * ────────────────────────────────────────────────────────────────────── */
.display-mode-toggle {
  display: inline-flex;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px;
}
.dm-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: transparent;
  border: 0;
  padding: 4px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.dm-btn:hover:not(.active) { color: var(--text); }
.dm-btn.active {
  background: var(--accent);
  color: var(--bg);
}

/* ──────────────────────────────────────────────────────────────────────
 * Fullscreen button (icon only, sits at the right edge of the playback
 * bar where the "ready" status used to be the visual anchor).
 * ────────────────────────────────────────────────────────────────────── */
.fullscreen-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, border-color 0.15s;
}
.fullscreen-btn:hover {
  color: var(--text);
  border-color: var(--accent);
}

/* In fullscreen we hide the redundant fullscreen-button glyph swap: we
   still toggle the same button. Just keep status readable on black bg. */
.comp-stage:fullscreen .playback-status,
.comp-stage:-webkit-full-screen .playback-status {
  color: var(--text-muted);
}

/* ──────────────────────────────────────────────────────────────────────
 * FPS slider — replaces the old text box. The .playback-fps wrapper
 * already provides inline-flex layout; we just size the range itself.
 * ────────────────────────────────────────────────────────────────────── */
input[type="range"].fps-slider {
  width: 90px;
  height: 4px;
}
.fps-value {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text);
  min-width: 22px;
  text-align: right;
}

/* ──────────────────────────────────────────────────────────────────────
 * Coverr attribution — tiny label overlaid on the bottom-right corner of
 * the panel-grid for wild scenes sourced from coverr.co.
 * ────────────────────────────────────────────────────────────────────── */
.coverr-attribution {
  position: absolute;
  bottom: 6px;
  right: 8px;
  font-size: 10px;
  color: rgba(255, 255, 255, 0.6);
  background: rgba(0, 0, 0, 0.45);
  padding: 2px 5px;
  border-radius: 3px;
  pointer-events: none;
  z-index: 4;
  line-height: 1.3;
}

/* ──────────────────────────────────────────────────────────────────────
 * Scene title — shown below the panel-grid for cinema scenes. Sits
 * between the panel-grid and the playback bar, styled to match
 * .scene-prompt so the visual seam is consistent.
 * ────────────────────────────────────────────────────────────────────── */
.scene-title {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--text-muted);
  text-align: center;
  padding: 9px 16px;
  background: var(--bg-elev);
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
}
.comp-stage:fullscreen .scene-title,
.comp-stage:-webkit-full-screen .scene-title {
  background: #000;
  border: 0;
  color: var(--text-muted);
  padding: 10px 24px;
}

/* ──────────────────────────────────────────────────────────────────────
 * Scene prompt — sits above the playback bar, used for the text_to_video
 * section. Italic serif so it reads as quoted text rather than UI chrome.
 * ────────────────────────────────────────────────────────────────────── */
.scene-prompt {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.0rem;
  line-height: 1.5;
  color: var(--text-muted);
  text-align: center;
  padding: 10px 16px;
  background: var(--bg-elev);
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
}
.scene-prompt::before { content: '\201C'; }  /* left double-quote */
.scene-prompt::after  { content: '\201D'; }  /* right double-quote */
.comp-stage:fullscreen .scene-prompt,
.comp-stage:-webkit-full-screen .scene-prompt {
  background: #000;
  border: 0;
  color: var(--text);
  font-size: 1.15rem;
  padding: 14px 24px;
}

/* ──────────────────────────────────────────────────────────────────────
 * Display-mode prompt — shown after the folder picker. SDR/HDR choice.
 * ────────────────────────────────────────────────────────────────────── */
.dmp-buttons {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  align-items: center;
  justify-content: center;
}
.dmp-buttons .primary-btn,
.dmp-buttons .ghost-btn {
  font-size: 0.95rem;
}
.dmp-buttons .primary-btn[disabled],
.dmp-buttons .ghost-btn[disabled] {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

/* Picker variant where the call-to-action button is centered. */
.picker-card-center { text-align: center; }
.picker-card-center p { text-align: center; }
.picker-action {
  display: flex;
  justify-content: center;
  margin: 18px 0 6px;
}

/* HDR-detection badge on the display-mode prompt. Mirrors the diagnostics
 * hdr-badge styling but lives in the picker card so reviewers immediately
 * see whether their display was identified as HDR-capable. */
.dmp-detect {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 4px auto 16px;
}
.dmp-detect-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--text-faint);
  box-shadow: 0 0 0 0 transparent;
}
.dmp-detect[data-state="hdr"] {
  border-color: var(--ok);
  color: var(--ok);
}
.dmp-detect[data-state="hdr"] .dmp-detect-dot {
  background: var(--ok);
  box-shadow: 0 0 0 4px rgba(107, 207, 158, 0.18);
}
.dmp-detect[data-state="sdr"] {
  border-color: var(--warn);
  color: var(--warn);
}
.dmp-detect[data-state="sdr"] .dmp-detect-dot {
  background: var(--warn);
}

.dmp-multi {
  color: var(--accent-strong);
  font-weight: 600;
}
.dmp-note {
  color: var(--text-faint);
  font-size: 0.86rem;
}
.dmp-fineprint {
  color: var(--text-faint);
  font-size: 0.82rem;
  margin-top: 14px;
}

/* ──────────────────────────────────────────────────────────────────────
 * Zoom-drawer toggle pill — sits on the right edge of the drawer header.
 * The bare chevron wasn't reading as interactive to reviewers; the pill
 * gives an unambiguous label that flips between "Hide" and "Show" via
 * the .open class on the drawer root.
 * ────────────────────────────────────────────────────────────────────── */
.zoom-drawer-toggle {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 5px 14px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  flex: 0 0 auto;
}
.zoom-drawer-toggle:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}

/* ──────────────────────────────────────────────────────────────────────
 * Folder-picker non-fatal warning — orange, distinct from the red error.
 * ────────────────────────────────────────────────────────────────────── */
.picker-warn {
  color: var(--warn);
  background: rgba(217, 168, 107, 0.08);
  border: 1px solid rgba(217, 168, 107, 0.35);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 0.86rem;
  line-height: 1.5;
  text-align: left;
  margin: 10px 0 0;
}

/* ──────────────────────────────────────────────────────────────────────
 * Fullscreen scene strip — vertical thumbnail rail anchored to the left
 * edge of the comp-stage. Shown ONLY in fullscreen so users can switch
 * scenes without exiting; hidden in normal flow because the regular
 * thumb-rail above the panels already covers that affordance.
 *
 * .fs-stage-content wraps the panel-grid + scene-prompt + playback-bar
 * so the strip can sit beside them in a flex row when fullscreen.
 * ────────────────────────────────────────────────────────────────────── */
.fs-scene-strip {
  display: none;   /* hidden by default; revealed in fullscreen below */
}
.fs-stage-content {
  display: contents;   /* layout-neutral in normal flow */
}

.comp-stage:fullscreen,
.comp-stage:-webkit-full-screen {
  flex-direction: row;   /* override the column flex set elsewhere */
}
.comp-stage:fullscreen .fs-stage-content,
.comp-stage:-webkit-full-screen .fs-stage-content {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-width: 0;
  min-height: 0;
}
.comp-stage:fullscreen .fs-scene-strip,
.comp-stage:-webkit-full-screen .fs-scene-strip {
  display: flex;
  flex-direction: column;
  flex: 0 0 130px;
  width: 130px;
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  background: #000;
  border-right: 1px solid var(--border);
  padding: 8px 6px;
  gap: 8px;
}
.fs-scene-card {
  flex: 0 0 auto;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  padding: 0;
  transition: border-color 0.15s, transform 0.15s;
}
.fs-scene-card:hover { border-color: var(--accent); transform: translateY(-1px); }
.fs-scene-card.active {
  border-color: var(--accent-strong);
  box-shadow: 0 0 0 2px var(--accent);
}
.fs-scene-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ──────────────────────────────────────────────────────────────────────
 * Hide the hover-zoom lens cursor box in fullscreen. The lens overlay
 * exists to show users where the inspector is sampling, but the
 * inspector itself doesn't render in fullscreen (the drawer lives
 * outside .comp-stage). With no inspector visible, the floating
 * rectangle was just visual noise on the canvas.
 * ────────────────────────────────────────────────────────────────────── */
.comp-stage:fullscreen .zoom-lens,
.comp-stage:-webkit-full-screen .zoom-lens {
  display: none !important;
}

/* ──────────────────────────────────────────────────────────────────────
 * Custom scrollbar for the fullscreen scene strip. The Windows default
 * scrollbar is distracting against the all-black fullscreen background.
 * ────────────────────────────────────────────────────────────────────── */
.comp-stage:fullscreen .fs-scene-strip,
.comp-stage:-webkit-full-screen .fs-scene-strip {
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}
.comp-stage:fullscreen .fs-scene-strip::-webkit-scrollbar,
.comp-stage:-webkit-full-screen .fs-scene-strip::-webkit-scrollbar {
  width: 5px;
}
.comp-stage:fullscreen .fs-scene-strip::-webkit-scrollbar-track,
.comp-stage:-webkit-full-screen .fs-scene-strip::-webkit-scrollbar-track {
  background: transparent;
}
.comp-stage:fullscreen .fs-scene-strip::-webkit-scrollbar-thumb,
.comp-stage:-webkit-full-screen .fs-scene-strip::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 3px;
}

/* ──────────────────────────────────────────────────────────────────────
 * Playback-bar exposure control. Reuses the .fps-label / .fps-value /
 * .fps-slider styles so it looks identical to the FPS control.
 * ────────────────────────────────────────────────────────────────────── */
.pb-exposure-host {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ──────────────────────────────────────────────────────────────────────
 * In Slider (split) mode the right panel's label should sit at the
 * top-right edge so it's always legible — the left portion of the
 * right panel is clipped by the split divider.
 * ────────────────────────────────────────────────────────────────────── */
.panel-grid[data-display="split"] > .panel:nth-of-type(2) .panel-overlay {
  left: auto;
  right: 12px;
}