:root {
  color-scheme: dark;
  --background: #0d0f13;
  --panel: #15181e;
  --panel-raised: #1b1f27;
  --line: #292e38;
  --line-strong: #3a4250;
  --text: #f2f4f7;
  --muted: #969eaa;
  --accent: #8ba5ff;
  --accent-strong: #6f8ff7;
  --danger: #ff7f82;
  --radius: 18px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 80% -20%, rgba(80, 105, 170, 0.13), transparent 38rem),
    var(--background);
  color: var(--text);
}

button, input, textarea, select { font: inherit; }
button { color: inherit; }

.page-header, main {
  width: min(1600px, calc(100% - 48px));
  margin-inline: auto;
}

.page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 34px 0 22px;
}

h1, h2, p { margin: 0; }
h1 { font-size: 25px; letter-spacing: -0.04em; }
h2 { font-size: 16px; font-weight: 640; }
.page-header p { margin-top: 5px; color: var(--muted); font-size: 13px; }

.status-pill {
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  background: rgba(21, 24, 30, 0.8);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.14fr) minmax(380px, 0.86fr);
  gap: 18px;
  align-items: start;
}

.panel, .generate-card, .result-panel {
  border: 1px solid var(--line);
  background: rgba(21, 24, 30, 0.94);
  border-radius: var(--radius);
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.16);
}

.panel { padding: 16px; }
.panel-heading, .result-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 13px;
}
.panel-actions { display: flex; align-items: center; gap: 6px; }
.panel-actions .danger-quiet { margin-left: 0; }

.eyebrow {
  display: block;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 3px;
}

.icon-button, .quiet-button, .tool-button, .text-button, .primary-small, .danger-quiet {
  border: 1px solid var(--line);
  background: var(--panel-raised);
  border-radius: 9px;
  cursor: pointer;
  transition: border-color 120ms, background 120ms, transform 120ms;
}

.icon-button:hover, .quiet-button:hover, .tool-button:hover, .text-button:hover,
.primary-small:hover { border-color: var(--line-strong); background: #222731; }
.icon-button:active, .quiet-button:active, .tool-button:active { transform: scale(0.97); }
.icon-button { width: 31px; height: 31px; font-size: 20px; line-height: 1; }
.quiet-button, .tool-button, .text-button, .primary-small, .danger-quiet { padding: 7px 10px; font-size: 12px; }
.primary-small { background: var(--accent-strong); border-color: var(--accent-strong); color: white; }
.tool-button.active { background: rgba(111, 143, 247, 0.2); border-color: var(--accent); }
.danger-quiet { margin-left: auto; color: var(--danger); background: transparent; }
.danger-quiet:hover { background: rgba(255, 127, 130, 0.08); }

.source-workspace { display: grid; grid-template-columns: 92px minmax(0, 1fr); gap: 12px; }
.source-rail {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 620px;
  overflow-y: auto;
  scrollbar-width: thin;
}

.source-tile, .source-upload-tile, .target-tile, .target-upload-tile {
  position: relative;
  flex: 0 0 68px;
  width: 100%;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #0f1116;
  cursor: pointer;
}
.source-tile img, .target-tile img { width: 100%; height: 100%; object-fit: cover; display: block; }
.source-tile.selected, .target-tile.selected { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.source-tile .tile-label, .target-tile .tile-label {
  position: absolute; inset: auto 4px 4px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  padding: 3px 5px; border-radius: 5px;
  font-size: 9px; text-align: left;
  background: rgba(0, 0, 0, 0.7);
}
.source-upload-tile, .target-upload-tile { font-size: 24px; color: var(--muted); border-style: dashed; }
.source-upload-tile:hover, .target-upload-tile:hover { color: var(--text); border-color: var(--line-strong); }

.canvas-host {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 430px;
  max-height: 650px;
  overflow: hidden;
  border-radius: 13px;
  background: #090b0e;
  border: 1px solid #20242c;
}
.target-host { min-height: 350px; }
.canvas-host canvas {
  display: none;
  max-height: 650px;
  touch-action: none;
}
.canvas-host video {
  display: none;
  width: 100%;
  height: 100%;
  max-height: 650px;
  object-fit: contain;
  background: black;
}
.canvas-host.playing video { display: block; }
.canvas-host.has-image canvas { display: block; }
.canvas-host.has-image.playing canvas { display: none; }

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  border: 0;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  padding: 40px;
}
.canvas-host.has-image .empty-state { display: none; }
.empty-state strong { color: #d9dde4; font-size: 14px; font-weight: 600; }
.empty-state small { max-width: 270px; line-height: 1.45; }
.empty-icon { font-size: 26px; color: var(--accent); }

.canvas-status, .mode-badge {
  position: absolute;
  top: 10px;
  padding: 6px 9px;
  border-radius: 7px;
  font-size: 11px;
  backdrop-filter: blur(10px);
}
.canvas-status { left: 10px; background: rgba(11, 13, 17, 0.76); color: #c4cad4; }
.mode-badge { right: 10px; background: rgba(111, 143, 247, 0.88); color: white; }

.canvas-tools {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 39px;
  padding-top: 8px;
}
.shortcut-hint { color: var(--muted); font-size: 10px; line-height: 1.3; }
.tool-spacer { flex: 1; }

.source-settings {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding-top: 5px;
  border-top: 1px solid transparent;
}
.source-settings label, .advanced-grid label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 620;
}
.source-settings input { width: 90px; }
.source-meta { color: var(--muted); font-size: 10px; padding-bottom: 8px; }

.playback-row { display: flex; align-items: center; gap: 9px; min-height: 34px; }
.playback-button {
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  padding: 0;
}
.playback-icon {
  display: block;
  width: 15px;
  height: 15px;
  fill: currentColor;
}
.playback-row .source-meta { margin-left: auto; padding: 0; }
.playback-row .danger-quiet { margin-left: 0; }
.source-time { color: #cbd1dc; font-size: 10px; font-variant-numeric: tabular-nums; }
.video-timeline {
  position: relative;
  height: 66px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #090b0e;
  cursor: ew-resize;
  touch-action: none;
  user-select: none;
}
.timeline-filmstrip { position: absolute; inset: 0; display: flex; justify-content: space-between; gap: 3px; }
.timeline-thumbnail { position: relative; flex: 0 0 auto; height: 100%; overflow: hidden; }
.timeline-thumbnail img { width: 100%; height: 100%; object-fit: cover; opacity: .84; }
.timeline-selection { position: absolute; top: 0; bottom: 0; border-block: 2px solid var(--accent); pointer-events: none; }
.timeline-before, .timeline-after { position: absolute; top: 0; bottom: 0; background: rgba(4,5,7,.67); pointer-events: none; }
.trim-handle {
  position: absolute; z-index: 12; top: 0; bottom: 0; width: 10px;
  border: 0; background: var(--accent); transform: translateX(-50%); cursor: col-resize;
}
.trim-handle::after { content: ""; position: absolute; inset: 24px 3px; border-left: 1px solid white; border-right: 1px solid white; opacity: .8; }
.timeline-playhead { position: absolute; z-index: 7; top: 0; bottom: 0; width: 2px; background: white; transform: translateX(-1px); pointer-events: none; box-shadow: 0 0 0 1px rgba(0,0,0,.3); }
.timeline-playhead::before { content: ""; position: absolute; left: -4px; top: 0; border: 5px solid transparent; border-top-color: white; }
.timeline-masks { position: absolute; z-index: 9; inset: 0; pointer-events: none; }
.timeline-mask-preview {
  position: absolute; width: 38px; height: 27px;
  padding: 0; overflow: hidden; border: 2px solid; border-radius: 5px;
  background: black; transform: translateX(-50%); pointer-events: auto; cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,.5);
}
.timeline-mask-preview img { display: block; width: 100%; height: 100%; object-fit: cover; }
.timeline-mask-preview.excluded { opacity: .42; filter: grayscale(.45); }

.target-workspace { display: grid; grid-template-columns: minmax(0, 1fr) 76px; gap: 10px; }
.target-main { min-width: 0; }
.target-rail {
  display: flex; flex-direction: column; gap: 8px; max-height: 500px;
  overflow-y: auto; scrollbar-width: thin;
}
.target-tile, .target-upload-tile { flex-basis: 62px; }

input, textarea, select {
  border: 1px solid var(--line);
  color: var(--text);
  background: #101318;
  border-radius: 9px;
  outline: none;
  transition: border-color 120ms, box-shadow 120ms;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--accent-strong);
  box-shadow: 0 0 0 3px rgba(111, 143, 247, 0.12);
}
input, select { height: 34px; padding: 0 9px; }
textarea { width: 100%; padding: 10px 11px; resize: vertical; min-height: 62px; line-height: 1.4; }

.target-stack { display: flex; flex-direction: column; gap: 18px; }
.generate-card { padding: 16px; }
.prompt-label { display: block; margin-bottom: 7px; font-size: 12px; font-weight: 620; }
details { margin-top: 9px; }
summary { color: var(--muted); font-size: 11px; cursor: pointer; user-select: none; }
.advanced-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 11px;
  padding: 12px;
  background: #111419;
  border: 1px solid var(--line);
  border-radius: 11px;
}
.negative-prompt { grid-column: 1 / -1; }
.generate-button {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 50px;
  margin-top: 13px;
  border: 0;
  border-radius: 12px;
  color: white;
  background: linear-gradient(135deg, #6d8ef8, #876fe9);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 28px rgba(93, 111, 218, 0.23);
  transition: filter 120ms, transform 120ms;
}
.generate-button-content { position: relative; z-index: 1; display: inline-flex; align-items: center; justify-content: center; gap: 8px; }
.generate-button-progress {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  background: rgba(255, 255, 255, 0.18);
  transition: width 180ms linear;
}
.generate-button-progress.indeterminate {
  width: 36%;
  animation: progress-slide 1.1s ease-in-out infinite;
}
.generate-button.generating:disabled { opacity: 1; filter: none; }
.generate-button:hover { filter: brightness(1.08); }
.generate-button:active { transform: translateY(1px); }
.generate-button:disabled { cursor: wait; filter: grayscale(.45); opacity: .72; }
.generate-hint { margin-top: 8px; min-height: 15px; color: var(--muted); font-size: 10px; text-align: center; }
.generated-rail { display: flex; gap: 8px; margin-top: 10px; padding: 2px 1px 3px; overflow-x: auto; scrollbar-width: thin; }
.generated-tile { flex: 0 0 74px; width: 74px; height: 52px; padding: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 9px; background: #101319; cursor: pointer; }
.generated-tile:hover { border-color: var(--accent); }
.generated-tile video { display: block; width: 100%; height: 100%; object-fit: cover; }
@keyframes progress-slide { from { transform: translateX(-110%); } to { transform: translateX(310%); } }

.result-panel { margin: 18px 0 50px; padding: 16px; }
.result-heading span:last-child { color: var(--muted); font-size: 11px; }
.result-panel video { display: block; width: min(100%, 1000px); margin: auto; border-radius: 12px; background: black; }

.context-menu {
  position: fixed;
  z-index: 100;
  min-width: 210px;
  max-height: min(430px, calc(100vh - 20px));
  overflow-y: auto;
  padding: 6px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: rgba(26, 30, 37, 0.98);
  box-shadow: 0 18px 55px rgba(0, 0, 0, .45);
  backdrop-filter: blur(18px);
}
.menu-label { padding: 8px 9px 5px; color: var(--muted); font-size: 9px; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; }
.menu-divider { height: 1px; background: var(--line); margin: 5px; }
.menu-item {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  min-height: 34px;
  padding: 7px 9px;
  border: 0;
  border-radius: 8px;
  color: var(--text);
  text-align: left;
  background: transparent;
  cursor: pointer;
}
.menu-item:hover { background: #252a34; }
.menu-item.danger { color: var(--danger); }
.menu-item img { width: 58px; height: 38px; object-fit: cover; border-radius: 5px; }
.color-dot { flex: 0 0 10px; width: 10px; height: 10px; border-radius: 50%; }
.menu-copy { min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.menu-copy small { color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 130px; }

.drag-ghost {
  position: fixed;
  z-index: 120;
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 10px;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 999px;
  background: rgba(20, 23, 29, .92);
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
  font-size: 11px;
  transform: translate(12px, 12px);
}

.toast {
  position: fixed;
  z-index: 200;
  left: 50%; bottom: 24px;
  transform: translateX(-50%);
  max-width: min(520px, calc(100% - 32px));
  padding: 10px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: #232831;
  box-shadow: 0 14px 40px rgba(0,0,0,.4);
  font-size: 12px;
}

.hidden { display: none !important; }

@media (max-width: 980px) {
  .workspace { grid-template-columns: 1fr; }
  .source-panel { order: 1; }
  .target-stack { order: 2; }
  .canvas-host { min-height: 330px; }
}

@media (max-width: 620px) {
  .page-header, main { width: min(100% - 22px, 1600px); }
  .page-header { padding-top: 22px; }
  .page-header p, .status-pill { display: none; }
  .panel, .generate-card, .result-panel { border-radius: 14px; }
  .source-workspace { grid-template-columns: 68px minmax(0, 1fr); }
  .source-tile, .source-upload-tile { flex-basis: 58px; }
  .canvas-host, .target-host { min-height: 260px; }
  .shortcut-hint { display: none; }
  .source-settings { flex-wrap: wrap; }
  .target-workspace { grid-template-columns: minmax(0, 1fr) 60px; }
  .advanced-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* What Moves? project-page theme */
:root {
  color-scheme: light;
  --background: #ffffff;
  --panel: rgba(255, 255, 255, 0.88);
  --panel-raised: #f7f8fb;
  --line: #e4e6ed;
  --line-strong: #c7ccd8;
  --text: #26272b;
  --muted: #777b84;
  --accent: #25d5f4;
  --accent-strong: #1688b9;
  --magenta: #df58f5;
  --blue: #73a3ff;
  --danger: #c94d57;
  --radius: 22px;
  --shadow-cyan: 0 18px 52px rgba(37, 213, 244, 0.2);
  --shadow-magenta: 0 18px 52px rgba(223, 88, 245, 0.18);
}

body {
  background:
    linear-gradient(120deg, rgba(37, 213, 244, 0.09), transparent 28%),
    linear-gradient(260deg, rgba(223, 88, 245, 0.08), transparent 24%),
    var(--background);
}

.page-header {
  position: sticky;
  top: 0;
  z-index: 50;
  align-items: center;
  width: 100%;
  max-width: none;
  padding: 13px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid rgba(228, 230, 237, 0.8);
  background: rgba(255, 255, 255, 0.76);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.page-header > * { margin-inline: 0; }

.start-over-button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--accent-strong);
  background: rgba(255, 255, 255, 0.82);
  font-size: 12px;
  font-weight: 680;
  cursor: pointer;
  transition: border-color 120ms, background 120ms, transform 120ms;
}
.project-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--accent-strong);
  background: rgba(255, 255, 255, 0.68);
  font-size: 12px;
  font-weight: 680;
  text-decoration: none;
  transition: border-color 120ms, background 120ms, transform 120ms;
}
.project-link:hover { border-color: var(--line-strong); background: white; }
.project-link:active { transform: translateY(1px); }
.external-link-icon { font-size: 15px; line-height: 0.8; }
.start-over-button:hover { border-color: var(--line-strong); background: white; }
.start-over-button:active { transform: translateY(1px); }
.header-actions { display: flex; align-items: center; justify-content: flex-end; gap: 8px; flex-wrap: wrap; }
.broom-icon {
  width: 19px;
  height: 19px;
  background: currentColor;
  -webkit-mask: url("/static/broom-flaticon.png") center / contain no-repeat;
  mask: url("/static/broom-flaticon.png") center / contain no-repeat;
}
.app-brand {
  display: flex;
  align-items: center;
  gap: 13px;
}

.app-kicker {
  display: block;
  margin-bottom: 4px;
  color: var(--accent-strong);
  font-size: 9px;
  font-weight: 850;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 0.95;
  letter-spacing: -0.02em;
  background: linear-gradient(105deg, var(--accent) 4%, var(--blue) 42%, var(--magenta) 82%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

h2 {
  font-size: 18px;
  font-weight: 720;
  letter-spacing: -0.02em;
}

.page-header p {
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
}

main { padding-top: 28px; }

.status-pill {
  padding: 0;
  border: 0;
  border-radius: 0;
  color: var(--muted);
  font-weight: 400;
  background: transparent;
  box-shadow: none;
}

.panel,
.generate-card,
.result-panel {
  border-color: var(--line);
  background: var(--panel);
  box-shadow: 0 20px 64px rgba(32, 36, 46, 0.1);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.source-panel { box-shadow: var(--shadow-cyan); }
.target-panel { box-shadow: var(--shadow-magenta); }

.eyebrow { color: var(--accent-strong); }

.icon-button,
.quiet-button,
.tool-button,
.text-button,
.primary-small,
.danger-quiet {
  border-color: var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 8px 20px rgba(34, 38, 48, 0.06);
}

.icon-button:hover,
.quiet-button:hover,
.tool-button:hover,
.text-button:hover,
.primary-small:hover {
  border-color: rgba(37, 213, 244, 0.55);
  background: #ffffff;
  color: var(--accent-strong);
  box-shadow: var(--shadow-cyan);
}

.primary-small {
  border-color: transparent;
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent-strong), var(--blue));
}

.tool-button.active {
  border-color: var(--accent);
  color: var(--accent-strong);
  background: rgba(37, 213, 244, 0.13);
}

.danger-quiet { color: var(--danger); background: transparent; box-shadow: none; }
.danger-quiet:hover { border-color: rgba(201, 77, 87, 0.25); background: rgba(201, 77, 87, 0.08); }

.source-tile,
.source-upload-tile,
.target-tile,
.target-upload-tile { background: #f1f3f7; }

.source-tile.selected,
.target-tile.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(37, 213, 244, 0.2), var(--shadow-cyan);
}

.source-upload-tile:hover,
.target-upload-tile:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
  background: rgba(37, 213, 244, 0.07);
}

.canvas-host {
  border-color: #dfe3eb;
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(37, 213, 244, 0.06), transparent 34%),
    #11141a;
}

.canvas-host:not(.has-image) {
  border-color: var(--line-strong);
  border-style: dashed;
  background:
    linear-gradient(135deg, rgba(37, 213, 244, 0.07), transparent 42%),
    linear-gradient(315deg, rgba(223, 88, 245, 0.06), transparent 38%),
    #f7f8fb;
}

.canvas-host:not(.has-image) .empty-state { color: var(--muted); }
.canvas-host:not(.has-image) .empty-state strong { color: var(--text); font-weight: 650; }

.mode-badge {
  color: #173145;
  font-weight: 750;
  background: linear-gradient(135deg, rgba(37, 213, 244, 0.92), rgba(115, 163, 255, 0.92));
}

.source-time { color: #555b66; }

input,
textarea,
select {
  border-color: var(--line);
  border-radius: 11px;
  color: var(--text);
  background: #ffffff;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 213, 244, 0.14);
}

.generate-card {
  background:
    linear-gradient(135deg, rgba(37, 213, 244, 0.07), transparent 36%),
    linear-gradient(315deg, rgba(223, 88, 245, 0.07), transparent 30%),
    var(--panel);
}

.advanced-grid { background: rgba(247, 248, 251, 0.86); }

.generate-button {
  background: linear-gradient(105deg, var(--accent), var(--blue) 48%, var(--magenta));
  box-shadow: 0 14px 34px rgba(115, 163, 255, 0.28);
}

.progress-copy { color: #555b66; }
.progress-track { background: #e9ecf2; }
.progress-bar { background: linear-gradient(90deg, var(--accent), var(--magenta)); }

.context-menu {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 18px 55px rgba(34, 38, 48, 0.18);
}

.menu-item:hover { background: rgba(37, 213, 244, 0.08); }

.drag-ghost {
  border: 0;
  background: transparent;
  box-shadow: none;
}

.toast {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 14px 40px rgba(34, 38, 48, 0.18);
}

/* Small, shape-preserving mask feedback for mapping gestures. */
.drag-ghost {
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: 0;
  transform: translate(-72%, -72%);
  opacity: 0.94;
  filter: drop-shadow(0 3px 5px rgba(31, 42, 55, 0.28));
  animation: mask-pickup 150ms cubic-bezier(.2, 1.4, .4, 1) both;
}

.drag-mask-shape,
.mapping-hint-token,
.mapping-drop-pop { display: block; overflow: visible; }
.drag-mask-shape { width: 100%; height: 100%; }
.drag-mask-shape img,
.mapping-hint-token img,
.mapping-drop-pop img { display: block; width: 100%; height: 100%; object-fit: contain; }

@keyframes mask-pickup {
  from { opacity: 0; transform: translate(-72%, -72%) scale(.2); }
  to { opacity: .94; transform: translate(-72%, -72%) scale(1); }
}

.mapping-drop-pop {
  position: fixed;
  z-index: 119;
  width: 48px;
  height: 48px;
  pointer-events: none;
  filter: drop-shadow(0 3px 6px rgba(31, 42, 55, 0.24));
  animation: mask-drop 440ms cubic-bezier(.2, 1.3, .35, 1) both;
}

@keyframes mask-drop {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(.18); }
  52% { opacity: .95; transform: translate(-50%, -50%) scale(1.24); }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(.88); }
}

.mapping-hint {
  position: fixed;
  inset: 0;
  z-index: 115;
  pointer-events: none;
}

.mapping-hint-token {
  position: absolute;
  width: 44px;
  height: 44px;
  filter: drop-shadow(0 3px 5px rgba(31, 42, 55, 0.3));
  animation: mapping-hint-drag 2.45s cubic-bezier(.55, 0, .3, 1) both;
}

.mapping-hint-pointer {
  position: absolute;
  width: 24px;
  height: 28px;
  animation: mapping-hint-drag 2.45s cubic-bezier(.55, 0, .3, 1) both;
}
.mapping-hint-pointer svg { display: block; width: 100%; height: 100%; overflow: visible; }
.mapping-hint-pointer path { fill: white; stroke: #26323f; stroke-width: 1.7; stroke-linejoin: round; filter: drop-shadow(0 2px 2px rgba(31, 42, 55, .24)); }

.mapping-hint-copy {
  position: fixed;
  left: 50%;
  bottom: 26px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  background: rgba(255, 255, 255, .94);
  box-shadow: 0 10px 28px rgba(34, 38, 48, .14);
  font-size: 11px;
  font-weight: 680;
  transform: translateX(-50%);
  animation: mapping-hint-copy 2.45s ease both;
}

@keyframes mapping-hint-drag {
  0%, 12% { opacity: 0; transform: translate(-50%, -50%) scale(.2); }
  24% { opacity: .95; transform: translate(-50%, -50%) scale(1); }
  72% { opacity: .95; transform: translate(calc(var(--hint-x) - 50%), calc(var(--hint-y) - 50%)) scale(1); }
  86% { opacity: 1; transform: translate(calc(var(--hint-x) - 50%), calc(var(--hint-y) - 50%)) scale(1.3); }
  100% { opacity: 0; transform: translate(calc(var(--hint-x) - 50%), calc(var(--hint-y) - 50%)) scale(.72); }
}

@keyframes mapping-hint-copy {
  0%, 8%, 92%, 100% { opacity: 0; }
  18%, 82% { opacity: 1; }
}

/* Complete light-mode treatment, including transient and media surfaces. */
.canvas-host,
.canvas-host video,
.video-timeline,
.timeline-mask-preview,
.generated-tile,
.result-panel video {
  background: #f3f5f8;
}

.canvas-host { border-color: #dfe3eb; }
.timeline-before,
.timeline-after { background: rgba(255, 255, 255, .66); }
.timeline-playhead { background: var(--accent-strong); box-shadow: 0 0 0 1px rgba(255, 255, 255, .85); }
.timeline-playhead::before { border-top-color: var(--accent-strong); }
.timeline-mask-preview { box-shadow: 0 2px 8px rgba(34, 38, 48, .2); }
.canvas-status { color: var(--muted); background: rgba(255, 255, 255, .9); }
.context-menu { color: var(--text); background: rgba(255, 255, 255, .98); }
.menu-item:hover { background: #f1f4f8; }
.toast { color: var(--text); background: rgba(255, 255, 255, .98); }

.media-loader {
  position: absolute;
  inset: 0;
  z-index: 24;
  display: grid;
  place-items: center;
  pointer-events: none;
  border-radius: inherit;
  background: rgba(247, 248, 251, .58);
  backdrop-filter: blur(1.5px);
  -webkit-backdrop-filter: blur(1.5px);
}

.loading-spinner {
  width: 34px;
  height: 34px;
  border: 3px solid rgba(115, 163, 255, .2);
  border-top-color: var(--accent);
  border-right-color: var(--magenta);
  border-radius: 50%;
  box-shadow: 0 5px 18px rgba(115, 163, 255, .18);
  animation: media-spin .72s linear infinite;
}

@keyframes media-spin { to { transform: rotate(360deg); } }

.result-media {
  position: relative;
  flex: 1 1 auto;
  display: grid;
  min-width: 0;
  min-height: 0;
  place-items: center;
  overflow: hidden;
  border-radius: 12px;
}

.result-media video {
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: contain;
}

@media (prefers-reduced-motion: reduce) {
  .drag-ghost,
  .mapping-drop-pop,
  .mapping-hint-token,
  .mapping-hint-pointer,
  .mapping-hint-copy { animation-duration: 1ms; }
  .loading-spinner { animation: none; }
}

@media (max-width: 620px) {
  .page-header {
    width: 100%;
    padding: 11px;
  }

  .app-kicker { display: none; }
}

/* Viewport-fitting application shell */
html,
body {
  width: 100%;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
}

.page-header {
  flex: 0 0 auto;
  min-height: 0;
}

main {
  display: flex;
  flex: 1 1 auto;
  min-height: 0;
  padding-top: clamp(8px, 2vh, 20px);
  padding-bottom: clamp(8px, 2vh, 20px);
}

.workspace {
  width: 100%;
  height: 100%;
  min-height: 0;
  align-items: stretch;
  gap: clamp(8px, 1.2vw, 18px);
}

.panel,
.generate-card,
.target-stack,
.source-workspace,
.source-main,
.target-workspace,
.target-main {
  min-width: 0;
  min-height: 0;
}

.source-panel,
.target-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.source-workspace,
.target-workspace {
  flex: 1 1 auto;
  overflow: hidden;
}

.source-main,
.target-main {
  display: flex;
  flex-direction: column;
}

.canvas-host {
  flex: 1 1 auto;
  width: 100%;
  height: auto;
  min-height: 0;
  max-height: none;
}

.canvas-host canvas,
.canvas-host video {
  max-width: 100%;
  max-height: 100%;
}

.source-rail,
.target-rail {
  max-height: 100%;
  min-height: 0;
}

.target-stack {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  height: 100%;
}

.result-panel:not(.hidden) {
  position: fixed;
  top: clamp(72px, 12vh, 110px);
  left: 50%;
  width: min(620px, calc(100vw - 28px));
  height: min(460px, calc(100vh - 96px));
  transform: translateX(-50%);
  z-index: 70;
  display: flex;
  flex-direction: column;
  margin: 0;
  overflow: hidden;
  box-shadow: 0 28px 90px rgba(32, 36, 46, 0.24), var(--shadow-magenta);
}

.result-actions { display: flex; align-items: center; gap: 10px; }
.result-close { width: 28px; height: 28px; padding: 0; font-size: 19px; line-height: 1; }
.result-actions > span { color: var(--muted); font-size: 11px; }

.result-panel video {
  flex: 1 1 auto;
  width: auto;
  max-width: 100%;
  min-height: 0;
  object-fit: contain;
}

button,
.status-pill,
.canvas-status,
.mode-badge,
.source-tile .tile-label,
.target-tile .tile-label {
  align-items: center;
  justify-content: center;
  text-align: center;
}

button,
.status-pill,
.canvas-status,
.mode-badge {
  display: inline-flex;
}

button {
  line-height: 1.15;
}

.empty-state {
  display: flex;
  flex-direction: column;
}

.source-tile,
.target-tile {
  display: block;
}

.menu-item {
  justify-content: flex-start;
  text-align: left;
}

.panel-heading,
.result-heading {
  flex: 0 0 auto;
}

@media (max-height: 820px) {
  .page-header { padding-block: 8px; }
  h1 { font-size: clamp(25px, 2.4vw, 34px); }
  .page-header p { margin-top: 2px; }
  .panel { padding: 12px; }
  .panel-heading, .result-heading { margin-bottom: 8px; }
  .canvas-tools { min-height: 32px; padding-top: 5px; }
  .target-stack { gap: 9px; }
  .generate-card { padding: 11px 12px; }
  .generate-button { height: 40px; margin-top: 8px; }
  textarea { min-height: 44px; padding-block: 7px; }
  details { margin-top: 5px; }
  .generate-hint { margin-top: 5px; }
}

@media (max-width: 980px) {
  .workspace {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .source-panel,
  .target-stack {
    min-height: 0;
  }

  .canvas-host,
  .target-host {
    min-height: 0;
  }
}

@media (max-width: 620px) {
  main {
    width: calc(100% - 14px);
    padding-block: 7px;
  }

  .workspace { gap: 7px; }
  .panel, .generate-card { padding: 9px; border-radius: 15px; }
  .panel-heading { margin-bottom: 6px; }
  h2 { font-size: 15px; }
  .source-workspace { grid-template-columns: 64px minmax(0, 1fr); gap: 7px; }
  .target-workspace { grid-template-columns: minmax(0, 1fr) 54px; gap: 7px; }
  .source-tile, .source-upload-tile { flex-basis: 54px; }
  .target-tile, .target-upload-tile { flex-basis: 48px; }
  .canvas-host, .target-host { min-height: 0; border-radius: 11px; }
  .generate-button { height: 36px; }
  .prompt-label { margin-bottom: 4px; }
  textarea { min-height: 38px; }
  .generate-hint { display: none; }
}

@media (max-height: 650px) {
  .page-header p,
  .app-kicker,
  .shortcut-hint,
  .generate-hint { display: none; }

  .page-header { padding-block: 5px; }
  h1 { font-size: 25px; }
  main { padding-block: 6px; }

  .workspace {
    grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
    grid-template-rows: 1fr;
  }

  .panel { padding: 9px; }
  .panel-heading { margin-bottom: 5px; }
  .eyebrow { margin-bottom: 1px; }
  .canvas-tools { min-height: 29px; }
  .source-settings { gap: 3px; padding-top: 2px; }
  .video-timeline { height: 48px; }
  .generate-card { padding: 8px 10px; }
  .generate-button { height: 34px; }
  textarea { min-height: 34px; }
}