:root {
  --bg: #0b0c10;
  --fg: #e8eaed;
  --muted: #9aa0a6;
  --accent: #7aa2ff;
  --badge-bg: rgba(0, 0, 0, 0.55);
  --stage-shadow: 0 12px 40px rgba(0, 0, 0, 0.55);
  --fade-ms: 220ms;
  --drag-p: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

.app {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 12px;
}

.topbar {
  width: min(100%, 420px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.topbar .title {
  font-weight: 600;
  color: var(--fg);
  letter-spacing: 0.02em;
}

button.icon {
  appearance: none;
  border: 1px solid #2a2f3a;
  background: #151922;
  color: var(--fg);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
}
button.icon:hover { border-color: var(--accent); }

.stage-wrap {
  width: min(100vw - 24px, calc((100vh - 120px) * 9 / 16), 420px);
  aspect-ratio: 9 / 16;
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--stage-shadow);
  background: #111;
}

#stage {
  position: absolute;
  inset: 0;
  cursor: pointer;
}

#stage video,
#stage img.still {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity var(--fade-ms) ease, transform 60ms linear;
  pointer-events: none;
  transform-origin: center center;
  will-change: transform;
}

#stage video.visible,
#stage img.still.visible {
  opacity: 1;
}

#stage img.still.hidden {
  opacity: 0;
}

/* Follow-hand media transforms (lightweight, no physics) */
#stage.drag-follow-skirt-down video.visible,
#stage.drag-follow-skirt-down img.still.visible {
  transform: translateY(calc(var(--drag-p) * -16px)) scaleY(calc(1 - var(--drag-p) * 0.035));
  transform-origin: 50% 18%;
}

#stage.drag-follow-skirt-up video.visible,
#stage.drag-follow-skirt-up img.still.visible {
  transform: translateY(calc(var(--drag-p) * 10px)) scaleY(calc(1 + var(--drag-p) * 0.02));
  transform-origin: 50% 18%;
}

#stage.drag-follow-blouse-down video.visible,
#stage.drag-follow-blouse-down img.still.visible {
  transform: translateY(calc(var(--drag-p) * 10px));
  transform-origin: 50% 22%;
}

#stage.drag-follow-blouse-up video.visible,
#stage.drag-follow-blouse-up img.still.visible {
  transform: translateY(calc(var(--drag-p) * -8px));
  transform-origin: 50% 22%;
}

/* Soft skirt lift mask hint */
.drag-preview {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  opacity: 0;
  transition: opacity 100ms ease;
}

.drag-preview.visible {
  opacity: 1;
}

.drag-preview.preview-skirt-down::after {
  content: "";
  position: absolute;
  left: 18%;
  right: 18%;
  top: calc(52% - var(--drag-p) * 10%);
  height: calc(36% + var(--drag-p) * 8%);
  border-radius: 40% 40% 18% 18%;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.0) 0%,
    rgba(122, 162, 255, calc(0.08 + var(--drag-p) * 0.18)) 40%,
    rgba(0, 0, 0, calc(0.12 + var(--drag-p) * 0.2)) 100%
  );
  box-shadow: inset 0 calc(var(--drag-p) * -18px) 28px rgba(0, 0, 0, 0.25);
  transition: top 60ms linear, height 60ms linear;
}

.drag-preview.preview-skirt-up::after {
  content: "";
  position: absolute;
  left: 18%;
  right: 18%;
  top: calc(48% + var(--drag-p) * 6%);
  height: 34%;
  border-radius: 30%;
  background: linear-gradient(
    0deg,
    rgba(126, 231, 168, calc(0.05 + var(--drag-p) * 0.12)),
    transparent 70%
  );
}

.drag-preview.preview-blouse-down::before,
.drag-preview.preview-blouse-up::before {
  content: "";
  position: absolute;
  left: 14%;
  right: 14%;
  top: calc(24% + var(--drag-p) * 4%);
  height: 16%;
  border-radius: 50%;
  border: 1px dashed rgba(122, 162, 255, calc(0.25 + var(--drag-p) * 0.45));
  box-shadow: 0 calc(var(--drag-p) * 6px) 18px rgba(122, 162, 255, 0.15);
  transition: top 60ms linear;
}

.drag-preview.preview-blouse-up::before {
  top: calc(24% - var(--drag-p) * 4%);
  border-color: rgba(126, 231, 168, calc(0.25 + var(--drag-p) * 0.4));
}

#assetBadge {
  position: absolute;
  left: 10px;
  bottom: 10px;
  z-index: 5;
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 8px;
  background: var(--badge-bg);
  color: #ffd666;
  pointer-events: none;
}

#hotDebug {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
}

.hotspot-box {
  position: absolute;
  border: 1px dashed rgba(122, 162, 255, 0.85);
  background: rgba(122, 162, 255, 0.12);
  color: #cfe0ff;
  font-size: 10px;
  padding: 2px 4px;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
}

.drag-fx {
  position: absolute;
  left: 50%;
  top: 58%;
  transform: translate(-50%, -50%) scale(0.96);
  z-index: 6;
  min-width: 156px;
  padding: 12px 16px 14px;
  border-radius: 14px;
  background: rgba(8, 10, 16, 0.72);
  border: 1px solid rgba(122, 162, 255, 0.35);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.45);
  color: #e8eaed;
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 120ms ease, transform 120ms ease, border-color 120ms ease;
}

.drag-fx.visible {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.drag-fx.ready {
  border-color: rgba(126, 231, 168, 0.75);
  background: rgba(12, 28, 20, 0.78);
}

.drag-fx.cancel {
  border-color: rgba(255, 170, 120, 0.7);
  background: rgba(36, 18, 12, 0.78);
}

.drag-arrow {
  font-size: 28px;
  line-height: 1;
  margin-bottom: 4px;
  color: #9ec1ff;
  transition: transform 60ms linear;
}

.drag-fx.ready .drag-arrow { color: #7ee7a8; }
.drag-fx.cancel .drag-arrow { color: #ffb38a; }

.drag-label {
  font-size: 12px;
  color: #c9d0db;
  margin-bottom: 8px;
}

.drag-bar {
  height: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  overflow: hidden;
  position: relative;
}

/* Commit threshold marker at 35% */
.drag-bar::after {
  content: "";
  position: absolute;
  left: 35%;
  top: -2px;
  bottom: -2px;
  width: 2px;
  background: rgba(255, 255, 255, 0.45);
  border-radius: 1px;
  pointer-events: none;
}

.drag-bar-fill {
  height: 100%;
  width: 0%;
  border-radius: inherit;
  background: linear-gradient(90deg, #7aa2ff, #a78bfa);
  transition: width 40ms linear;
}

.drag-fx.ready .drag-bar-fill {
  background: linear-gradient(90deg, #5eead4, #7ee7a8);
}

.hint {
  width: min(100%, 420px);
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

#statusLine {
  width: min(100%, 420px);
  text-align: center;
  color: #5f6775;
  font-size: 11px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  min-height: 1.2em;
}

@media (max-height: 700px) {
  .topbar { font-size: 12px; }
  .hint { font-size: 12px; }
}