/* VIDCOMPARE — dark, chroma-neutral chrome. Footage carries the colour;
   the single accent marks the wipe, active state and focus only. */

:root {
  color-scheme: dark;

  /* Neutrals: chroma 0 on purpose, tinted chrome skews colour judgement */
  --stage: oklch(0.13 0 0);
  --chrome: oklch(0.19 0 0);
  --chrome-2: oklch(0.165 0 0);
  --raised: oklch(0.24 0 0);
  --raised-2: oklch(0.29 0 0);
  --raised-3: oklch(0.34 0 0);
  --line: oklch(0.285 0 0);
  --line-strong: oklch(0.4 0 0);
  --ink: oklch(0.96 0 0);
  --ink-2: oklch(0.79 0 0);
  --ink-3: oklch(0.66 0 0);
  --ink-off: oklch(0.5 0 0);

  --accent: oklch(0.87 0.16 95);
  --accent-ink: oklch(0.2 0.03 95);
  --accent-soft: oklch(0.87 0.16 95 / 0.12);
  --danger: oklch(0.72 0.16 28);

  --scrim: oklch(0 0 0 / 0.62);

  --font: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;

  /* Type scale, fixed rem, ~1.15 ratio */
  --t-xs: 0.75rem;
  --t-sm: 0.8125rem;
  --t-md: 0.875rem;
  --t-base: 1rem;
  --t-lg: 1.375rem;

  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;

  --r-1: 2px;
  --r-2: 4px;
  --r-3: 6px;
  --r-4: 8px;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 150ms;
  --t-med: 200ms;

  --z-labels: 10;
  --z-divider: 20;
  --z-invite: 25;
  --z-dropzone: 30;
  --z-toast: 50;
}

*, *::before, *::after { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  height: 100dvh;
  overflow: hidden;
  background: var(--stage);
  color: var(--ink);
  font: 400 var(--t-md) / 1.45 var(--font);
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  font-kerning: normal;
}

/* Pin regions to rows so hidden siblings (notices, transport) never shift them */
.bar { grid-row: 1; }
.notices { grid-row: 2; }
.stage { grid-row: 3; }
.transport { grid-row: 4; }

button, select, input { font: inherit; color: inherit; letter-spacing: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

.i { width: 20px; height: 20px; flex: none; }

kbd {
  display: inline-block;
  min-width: 1.6em;
  padding: 1px 5px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: var(--r-2);
  background: var(--chrome);
  color: var(--ink);
  font: 500 var(--t-xs) / 1.4 var(--mono);
  text-align: center;
}

/* ───────── Controls ───────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  height: 32px;
  padding: 0 var(--s-3);
  border: 1px solid var(--line);
  border-radius: var(--r-3);
  background: var(--raised);
  font-weight: 500;
  white-space: nowrap;
  transition: background-color var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out);
}
.btn:hover { background: var(--raised-2); }
.btn:active { background: var(--raised-3); }

.btn--primary {
  height: 40px;
  padding: 0 var(--s-4) 0 var(--s-3);
  border-color: transparent;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}
.btn--primary:hover { background: oklch(0.91 0.15 95); }
.btn--primary:active { background: oklch(0.82 0.15 95); }

.btn--ghost {
  height: 28px;
  padding: 0 var(--s-2);
  border-color: transparent;
  background: transparent;
  color: var(--ink-2);
}
.btn--ghost:hover { background: var(--raised); color: var(--ink); }
.btn--mono { font: 500 var(--t-sm) / 1 var(--mono); font-variant-numeric: tabular-nums; }
.btn--ghost[aria-pressed="true"] { color: var(--ink); background: var(--raised); }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: var(--r-3);
  background: transparent;
  color: var(--ink-2);
  transition: background-color var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out);
}
.icon-btn:hover { background: var(--raised); color: var(--ink); }
.icon-btn:active { background: var(--raised-2); }
.icon-btn:disabled { color: var(--ink-off); background: transparent; cursor: default; }
.icon-btn[aria-pressed="true"] { color: var(--accent); }
.icon-btn[aria-pressed="false"] { color: var(--ink-3); }
.icon-btn--lg { width: 36px; height: 36px; color: var(--ink); background: var(--raised); }
.icon-btn--lg:hover { background: var(--raised-2); }

.seg {
  display: inline-flex;
  gap: 2px;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: var(--r-3);
  background: var(--chrome-2);
}
.seg button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 10px 0 8px;
  border: 0;
  border-radius: var(--r-2);
  background: transparent;
  color: var(--ink-3);
  font-weight: 500;
  font-size: var(--t-sm);
  transition: background-color var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out);
}
.seg button .i { width: 18px; height: 18px; }
.seg button:hover:not(:disabled) { color: var(--ink); background: var(--raised); }
.seg button[aria-pressed="true"] {
  color: var(--ink);
  background: var(--raised-2);
  box-shadow: inset 0 0 0 1px var(--line-strong);
}
.seg button:disabled { color: var(--ink-off); cursor: default; }
.seg--sm button { height: 26px; padding: 0 8px; font: 500 var(--t-xs) / 1 var(--mono); }

.select {
  height: 30px;
  padding: 0 26px 0 var(--s-2);
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  background: var(--raised) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='m3 4.5 3 3 3-3' fill='none' stroke='%23bdbdbd' stroke-width='1.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat right 8px center / 12px;
  appearance: none;
  color: var(--ink);
  font-size: var(--t-sm);
  cursor: pointer;
}
.select:hover { border-color: var(--line-strong); }
.select--compact { height: 28px; }
.select option { background: var(--raised); color: var(--ink); }

/* ───────── Top bar ───────── */

.bar {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr) auto;
  grid-template-areas: "brand views files tools";
  align-items: center;
  gap: var(--s-4);
  min-height: 52px;
  padding: var(--s-2) var(--s-3) var(--s-2) var(--s-4);
  background: var(--chrome);
  border-bottom: 1px solid var(--line);
}

.brand {
  grid-area: brand;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  border-radius: var(--r-2);
}
.brand__mark { width: 24px; height: 24px; }
.brand__word {
  font: 600 var(--t-sm) / 1 var(--font);
  letter-spacing: 0.14em;
}

.views {
  grid-area: views;
  display: flex;
  align-items: center;
  gap: var(--s-3);
}
.pair { display: flex; align-items: center; gap: 6px; min-width: 0; }
.pair .select { min-width: 0; max-width: 260px; text-overflow: ellipsis; }
.pair__vs { color: var(--ink-3); font-size: var(--t-xs); }

.files {
  grid-area: files;
  display: flex;
  justify-content: flex-start;
  gap: 6px;
  margin: 0;
  padding: 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.files::-webkit-scrollbar { display: none; }
/* auto margin instead of flex-end so overflowing chips stay scrollable */
.files > :first-child { margin-left: auto; }

.chip {
  display: flex;
  align-items: stretch;
  flex: 0 1 auto;
  min-width: 150px;
  max-width: 380px;
  border: 1px solid var(--line);
  border-radius: var(--r-3);
  background: var(--chrome-2);
  transition: border-color var(--t-fast) var(--ease-out), opacity var(--t-fast) var(--ease-out);
}
.chip.is-dragging { opacity: 0.4; }
.chip.is-drop { border-color: var(--accent); }
.chip.is-solo { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }

.chip__main {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  min-width: 0;
  height: 32px;
  padding: 0 var(--s-2) 0 4px;
  border: 0;
  border-radius: var(--r-3) 0 0 var(--r-3);
  background: transparent;
  text-align: left;
}
.chip__main:hover { background: var(--raised); }
.chip__letter {
  display: inline-grid;
  place-items: center;
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: var(--r-2);
  background: var(--raised-2);
  color: var(--ink-2);
  font: 600 var(--t-xs) / 1 var(--mono);
}
.chip.is-visible .chip__letter { background: var(--ink); color: var(--stage); }
.chip__text { display: grid; min-width: 0; line-height: 1.15; }
.chip__name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: var(--t-sm);
  font-weight: 500;
}
.chip__meta {
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--ink-3);
  font: 400 11px / 1.2 var(--mono);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.chip.is-error .chip__meta { color: var(--danger); }
.chip__x {
  display: grid;
  place-items: center;
  width: 28px;
  padding: 0;
  border: 0;
  border-left: 1px solid var(--line);
  border-radius: 0 var(--r-3) var(--r-3) 0;
  background: transparent;
  color: var(--ink-3);
}
.chip__x .i { width: 16px; height: 16px; }
.chip__x:hover { background: var(--raised); color: var(--ink); }

.add-file {
  height: 34px;
  border-style: dashed;
  border-color: var(--line-strong);
  background: transparent;
  color: var(--ink-2);
}
.add-file .i { width: 16px; height: 16px; }
.add-file:hover { color: var(--ink); }

.tools {
  grid-area: tools;
  display: flex;
  align-items: center;
  gap: 2px;
}
.zoom {
  display: flex;
  align-items: center;
  gap: 1px;
  height: 34px;
  margin-right: var(--s-2);
  padding: 0 2px 0 var(--s-2);
  border: 1px solid var(--line);
  border-radius: var(--r-3);
  background: var(--chrome-2);
}
.zoom__icon { width: 16px; height: 16px; margin-right: 2px; color: var(--ink-3); }
.zoom__sep { width: 1px; height: 16px; margin: 0 2px; background: var(--line); }
.zoom #zoomFit { min-width: 52px; justify-content: center; color: var(--ink); }
.zoom.is-zoomed { border-color: var(--line-strong); }
.zoom.is-zoomed .zoom__icon { color: var(--accent); }
.icon-btn--sm { width: 28px; height: 28px; }
.icon-btn--sm .i { width: 16px; height: 16px; }

/* First-run tip so zoom isn't a hidden gesture; goes away once used */
.zoom-hint {
  position: absolute;
  left: var(--s-4);
  bottom: var(--s-4);
  z-index: var(--z-invite);
  display: flex;
  align-items: center;
  gap: var(--s-2);
  max-width: calc(100% - 32px);
  padding: 6px 4px 6px 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-3);
  background: oklch(0.17 0 0 / 0.92);
  color: var(--ink-2);
  font-size: var(--t-sm);
  box-shadow: 0 6px 24px oklch(0 0 0 / 0.4);
  animation: toast-in var(--t-med) var(--ease-out) 600ms both;
}
.zoom-hint > .i { width: 16px; height: 16px; color: var(--accent); }
.zoom-hint b { color: var(--ink); font-weight: 500; }
.zoom-hint__coarse { display: none; }
@media (pointer: coarse) {
  .zoom-hint__fine { display: none; }
  .zoom-hint__coarse { display: inline; }
}
.zoom-hint__x {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  padding: 0;
  border: 0;
  border-radius: var(--r-2);
  background: transparent;
  color: var(--ink-3);
}
.zoom-hint__x .i { width: 14px; height: 14px; }
.zoom-hint__x:hover { background: var(--raised); color: var(--ink); }
.zoom-hint.is-leaving { opacity: 0; transform: translateY(4px); transition: opacity var(--t-med) var(--ease-out), transform var(--t-med) var(--ease-out); }

.tag__size { flex: none; color: var(--ink-2); font: normal 400 11px / 1.3 var(--mono); }

/* ───────── Notices ───────── */

.notices {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-1) var(--s-4);
  align-items: center;
  padding: 6px var(--s-3) 6px var(--s-4);
  background: var(--chrome-2);
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
  font-size: var(--t-sm);
}
.notice { display: flex; align-items: center; gap: var(--s-2); margin: 0; }
.notices__more { height: 24px; font-size: var(--t-xs); }
.notice .i { width: 16px; height: 16px; color: var(--ink-3); }
.notice b { color: var(--ink); font-weight: 500; }
.notices__dismiss { margin-left: auto; height: 24px; font-size: var(--t-xs); }

/* ───────── Stage ───────── */

.stage {
  position: relative;
  min-height: 0;
  overflow: hidden;
  background: var(--stage);
}
.stage.is-dragover { box-shadow: inset 0 0 0 2px var(--accent); }

.empty {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--s-6) var(--s-4);
  text-align: center;
}
.stage:not([data-mode="empty"]) .empty { display: none; }

.empty__glyph { width: 160px; height: 96px; margin-bottom: var(--s-6); overflow: visible; }
.empty__glyph-label { fill: var(--ink-3); font: 600 11px var(--mono); }
.empty__sweep { animation: sweep 1600ms var(--ease-out) 300ms both; transform-box: view-box; }
@keyframes sweep {
  0% { transform: translateX(-40px); }
  55% { transform: translateX(22px); }
  100% { transform: translateX(0); }
}
.empty__title {
  margin: 0 0 var(--s-2);
  font-size: var(--t-lg);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  text-wrap: balance;
}
.empty__lede {
  max-width: 46ch;
  margin: 0 0 var(--s-5);
  color: var(--ink-2);
  font-size: var(--t-base);
  line-height: 1.55;
  text-wrap: pretty;
}
.empty__formats {
  margin: var(--s-4) 0 0;
  color: var(--ink-3);
  font: 400 var(--t-xs) / 1.4 var(--mono);
  letter-spacing: 0.02em;
}
.empty__hint { margin: var(--s-7) 0 0; color: var(--ink-3); font-size: var(--t-sm); }

.tiles {
  position: absolute;
  inset: 0;
  display: grid;
  gap: 2px;
  background: var(--line);
}
.stage[data-mode="empty"] .tiles { display: none; }
.stage[data-mode="split"] .tiles { grid-template-columns: 1fr 1fr; }
.stage[data-mode="grid"] .tiles { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; }
@media (orientation: portrait) and (max-width: 900px) {
  .stage[data-mode="split"] .tiles { grid-template-columns: 1fr; grid-template-rows: 1fr 1fr; }
}

.tile {
  position: relative;
  container-type: size;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: var(--stage);
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}
.tile.is-zoomed { cursor: grab; }
.tile.is-panning { cursor: grabbing; }
.tile--wipe.is-following { cursor: col-resize; }
.tile--pickable { cursor: pointer; }

.viewport { position: absolute; inset: 0; overflow: hidden; }
.frame {
  position: absolute;
  inset: 0;
  transform-origin: 0 0;
  will-change: transform;
}
.layer { position: absolute; inset: 0; }
.layer > video, .layer > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  -webkit-user-drag: none;
}
.frame.is-pixel video, .frame.is-pixel img { image-rendering: pixelated; }

/* Tile labels: small, hard-edged, sit on the footage */
.tag {
  position: absolute;
  top: 10px;
  z-index: var(--z-labels);
  display: flex;
  align-items: center;
  gap: 6px;
  max-width: calc(50% - 24px);
  padding: 3px 7px 3px 3px;
  border-radius: var(--r-1);
  background: var(--scrim);
  color: var(--ink);
  font-size: var(--t-xs);
  line-height: 1.3;
  pointer-events: none;
  transition: opacity var(--t-fast) var(--ease-out);
}
.tag--start { left: 10px; }
.tag--end { right: 10px; flex-direction: row-reverse; padding: 3px 3px 3px 7px; }
.tag b {
  display: inline-grid;
  place-items: center;
  flex: none;
  width: 18px;
  height: 18px;
  border-radius: var(--r-1);
  background: var(--ink);
  color: var(--stage);
  font: 600 11px / 1 var(--mono);
}
.tag span { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.tag.is-faded { opacity: 0; }
/* Narrow tiles: two labels plus sizes would collide; chips still show size */
@container (max-width: 560px) { .tag__size { display: none; } }
.stage[data-labels="off"] .tag { opacity: 0; }
.tile--single .tag { max-width: calc(100% - 20px); }

/* Wipe divider */
.divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  z-index: var(--z-divider);
  width: 0;
  outline: none;
}
.divider__line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: -1px;
  width: 2px;
  background: oklch(0.97 0 0);
  box-shadow: 0 0 0 1px oklch(0 0 0 / 0.35);
  pointer-events: none;
}
.divider__handle {
  position: absolute;
  top: 50%;
  left: 0;
  display: grid;
  grid-auto-flow: column;
  place-content: center;
  gap: 3px;
  width: 22px;
  height: 44px;
  border: 2px solid var(--accent);
  border-radius: var(--r-2);
  background: oklch(0.13 0 0 / 0.8);
  transform: translate(-50%, -50%);
  cursor: grab;
  transition: background-color var(--t-fast) var(--ease-out), height var(--t-med) var(--ease-out);
}
.divider__handle::before, .divider__handle::after {
  content: "";
  width: 1.5px;
  height: 14px;
  border-radius: 1px;
  background: var(--accent);
}
/* Bigger hit area than the visible handle */
.divider__handle > i { position: absolute; inset: -10px -14px; }
.divider.is-locked .divider__handle { background: var(--accent); }
.divider.is-locked .divider__handle::before, .divider.is-locked .divider__handle::after { background: var(--accent-ink); }
.divider:focus-visible .divider__handle { outline: 2px solid var(--ink); outline-offset: 2px; }
.divider__hint {
  position: absolute;
  top: calc(50% + 32px);
  left: 0;
  padding: 3px 7px;
  border-radius: var(--r-1);
  background: var(--scrim);
  color: var(--ink-2);
  font-size: var(--t-xs);
  white-space: nowrap;
  transform: translateX(-50%);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-med) var(--ease-out);
}
.tile:hover .divider__hint, .divider:focus-visible .divider__hint { opacity: 1; }
.tile.is-dragging .divider__hint { opacity: 0; }

/* Loading skeleton */
.skeleton {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  align-content: center;
  gap: var(--s-2);
  background: linear-gradient(100deg, var(--stage) 30%, oklch(0.18 0 0) 50%, var(--stage) 70%) 0 0 / 300% 100%;
  color: var(--ink-3);
  font-size: var(--t-sm);
  animation: shimmer 1400ms linear infinite;
}
.skeleton b { color: var(--ink-2); font: 500 var(--t-xs) var(--mono); }
@keyframes shimmer { from { background-position: 100% 0; } to { background-position: -50% 0; } }

/* Grid picking */
.tile.is-picked::after, .tile.is-target::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: var(--z-divider);
  box-shadow: inset 0 0 0 2px var(--accent);
  pointer-events: none;
}
.tile.is-target::after { background: var(--accent-soft); }
.tile--wipe.is-target-start::after, .tile--wipe.is-target-end::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  z-index: var(--z-divider);
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 2px var(--accent);
  pointer-events: none;
}
.tile--wipe.is-target-start::after { left: 0; width: var(--d, 50%); }
.tile--wipe.is-target-end::after { right: 0; width: calc(100% - var(--d, 50%)); }
.pick-hint {
  position: absolute;
  bottom: 12px;
  left: 50%;
  z-index: var(--z-labels);
  padding: 4px 10px;
  border-radius: var(--r-2);
  background: var(--accent);
  color: var(--accent-ink);
  font-size: var(--t-xs);
  font-weight: 600;
  transform: translateX(-50%);
  white-space: nowrap;
  pointer-events: none;
}

.cell-add {
  display: grid;
  place-content: center;
  justify-items: center;
  gap: var(--s-2);
  margin: 0;
  padding: var(--s-4);
  border: 0;
  background: var(--stage);
  color: var(--ink-3);
  font-size: var(--t-sm);
  outline-offset: -4px;
  transition: color var(--t-fast) var(--ease-out), background-color var(--t-fast) var(--ease-out);
}
.cell-add > span:first-child {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-3);
}
.cell-add:hover { color: var(--ink); background: oklch(0.15 0 0); }
.cell-add.is-target { box-shadow: inset 0 0 0 2px var(--accent); background: var(--accent-soft); color: var(--ink); }

.invite {
  position: absolute;
  right: var(--s-4);
  bottom: var(--s-4);
  z-index: var(--z-invite);
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-3) var(--s-4) var(--s-3) var(--s-3);
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-4);
  background: oklch(0.17 0 0 / 0.92);
  color: var(--ink);
  text-align: left;
  transition: border-color var(--t-fast) var(--ease-out), background-color var(--t-fast) var(--ease-out);
}
.invite:hover { border-color: var(--ink-3); background: var(--chrome); }
.invite .i { color: var(--accent); }
.invite > span { display: grid; gap: 2px; }
.invite strong { font-weight: 500; }
.invite span span { color: var(--ink-3); font-size: var(--t-xs); }

.dropzone {
  position: absolute;
  inset: 0;
  z-index: var(--z-dropzone);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding-top: var(--s-4);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--t-fast) var(--ease-out);
}
.stage.is-dragover .dropzone { opacity: 1; }
.dropzone__label {
  padding: 6px 12px;
  border-radius: var(--r-3);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  font-size: var(--t-sm);
  box-shadow: 0 6px 24px oklch(0 0 0 / 0.45);
}
.stage[data-mode="empty"].is-dragover .empty__glyph rect:first-child { stroke: var(--accent); }

/* ───────── Transport ───────── */

.transport {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  min-height: 56px;
  padding: var(--s-2) var(--s-3);
  background: var(--chrome);
  border-top: 1px solid var(--line);
}
.transport__keys, .transport__opts { display: flex; align-items: center; gap: 2px; }
.transport__opts { gap: var(--s-2); }

.tc {
  flex: none;
  min-width: 11ch;
  color: var(--ink);
  font: 500 var(--t-sm) / 1 var(--mono);
  font-variant-numeric: tabular-nums;
  text-align: center;
}
.tc--dim { color: var(--ink-3); }

.scrub {
  --p: 0%;
  flex: 1;
  min-width: 120px;
  height: 28px;
  margin: 0;
  background: transparent;
  appearance: none;
  cursor: pointer;
}
.scrub::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(to right, var(--accent) var(--p), var(--raised-3) var(--p));
}
.scrub::-moz-range-track { height: 4px; border-radius: 2px; background: var(--raised-3); }
.scrub::-moz-range-progress { height: 4px; border-radius: 2px; background: var(--accent); }
.scrub::-webkit-slider-thumb {
  width: 4px;
  height: 18px;
  margin-top: -7px;
  border: 0;
  border-radius: 1px;
  background: var(--ink);
  box-shadow: 0 0 0 1px oklch(0 0 0 / 0.5);
  appearance: none;
}
.scrub::-moz-range-thumb {
  width: 4px;
  height: 18px;
  border: 0;
  border-radius: 1px;
  background: var(--ink);
}
.scrub:focus-visible { outline-offset: 0; }

.audio { display: flex; align-items: center; gap: 6px; color: var(--ink-3); }
.audio .i { width: 18px; height: 18px; }

/* ───────── Toasts ───────── */

.toasts {
  position: fixed;
  left: 50%;
  bottom: 76px;
  z-index: var(--z-toast);
  display: grid;
  gap: var(--s-2);
  justify-items: center;
  width: min(520px, calc(100vw - 24px));
  transform: translateX(-50%);
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--s-2);
  padding: 9px var(--s-3);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-3);
  background: var(--raised);
  color: var(--ink);
  font-size: var(--t-sm);
  box-shadow: 0 8px 28px oklch(0 0 0 / 0.5);
  pointer-events: auto;
  animation: toast-in var(--t-med) var(--ease-out);
}
.toast .i { width: 18px; height: 18px; margin-top: 1px; color: var(--danger); }
.toast.is-leaving { opacity: 0; transform: translateY(4px); transition: opacity var(--t-med) var(--ease-out), transform var(--t-med) var(--ease-out); }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } }

.parking { display: none; }

/* ───────── Help popover ───────── */

.help {
  inset: auto;
  top: 60px;
  right: var(--s-3);
  width: min(380px, calc(100vw - 24px));
  margin: 0;
  padding: var(--s-4);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-4);
  background: var(--raised);
  color: var(--ink);
  box-shadow: 0 16px 48px oklch(0 0 0 / 0.55);
  opacity: 1;
  transform: none;
  transition: opacity var(--t-med) var(--ease-out), transform var(--t-med) var(--ease-out), overlay var(--t-med) allow-discrete, display var(--t-med) allow-discrete;
}
@starting-style { .help:popover-open { opacity: 0; transform: translateY(-4px); } }
.help__title { margin: 0 0 var(--s-3); font-size: var(--t-md); font-weight: 600; }
.help__list { display: grid; gap: 7px; margin: 0; }
.help__list > div { display: grid; grid-template-columns: 8.5rem 1fr; align-items: baseline; gap: var(--s-3); }
.help__list dt { color: var(--ink-2); font-size: var(--t-xs); }
.help__list dd { margin: 0; color: var(--ink); font-size: var(--t-sm); }
.help__foot { margin: var(--s-4) 0 0; padding-top: var(--s-3); border-top: 1px solid var(--line); color: var(--ink-2); font-size: var(--t-sm); }

/* ───────── Responsive ───────── */

@media (max-width: 980px) {
  .chip__meta { display: none; }
  .chip { max-width: 200px; }
}

@media (max-width: 760px) {
  .bar {
    grid-template-columns: 1fr auto;
    grid-template-areas: "brand tools" "views views" "files files";
    gap: var(--s-2);
    padding: var(--s-2) var(--s-3);
  }
  .files { justify-content: flex-start; }
  .views { flex-wrap: wrap; min-width: 0; }
  .pair { flex: 1 1 100%; }
  .pair .select { flex: 1; max-width: none; }
  .seg button span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .seg button { padding: 0 8px; }
  .seg--sm button { padding: 0 7px; }
  .transport { flex-wrap: wrap; gap: var(--s-2); padding: var(--s-2) var(--s-3) var(--s-3); }
  .scrub { order: -1; flex-basis: 100%; }
  .tc { min-width: 0; }
  .transport__opts { margin-left: auto; }
  .toasts { bottom: 120px; }
  .help { top: 56px; }
}

@media (max-width: 420px) {
  .zoom #zoom1to1, .zoom__sep, .zoom__icon { display: none; }
  .zoom { padding-left: 2px; }
  .audio .i { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
  .skeleton { animation: none; background: oklch(0.16 0 0); }
}