:root {
  --bg: #0b0d10;
  --fg: #f5f7fa;
  --muted: #8a94a6;
  --panel: rgba(18, 22, 28, 0.72);
  --border: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Inter", system-ui, sans-serif;
  overflow: hidden;
}

.stage {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

#video, #ink, #overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* mirror the camera so movements feel natural */
  transform: scaleX(-1);
}

#video { z-index: 0; filter: brightness(0.55) saturate(0.8); }
#ink { z-index: 1; pointer-events: none; }
#overlay { z-index: 2; pointer-events: none; }

.hud {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 5;
  display: flex;
  gap: 10px;
  align-items: center;
}

.status, .gesture {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.gesture { font-weight: 600; letter-spacing: 0.3px; }

.toolbar {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 10px 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.swatches { display: flex; gap: 8px; }

.swatch {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: var(--c);
  cursor: pointer;
  padding: 0;
  transition: transform 0.12s ease, border-color 0.12s ease;
}
.swatch:hover { transform: scale(1.08); }
.swatch.active { border-color: #fff; transform: scale(1.1); }

.size {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
}
.size input {
  width: 110px;
  accent-color: #0a84ff;
}

.btn {
  background: rgba(255, 255, 255, 0.06);
  color: var(--fg);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.12s ease;
}
.btn:hover { background: rgba(255, 255, 255, 0.12); }

.hint {
  position: absolute;
  bottom: 92px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  font-size: 12px;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 999px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  white-space: nowrap;
}

.divider {
  width: 1px;
  height: 28px;
  background: var(--border);
}

.brushes { display: flex; gap: 6px; }

.brush {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 2px solid transparent;
  background: rgba(255, 255, 255, 0.06);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0;
  transition: transform 0.12s ease, border-color 0.12s ease, background 0.12s ease;
}
.brush:hover { transform: scale(1.08); background: rgba(255, 255, 255, 0.12); }
.brush.active {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.18);
}

.toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 18px;
  cursor: pointer;
  user-select: none;
  padding: 4px 8px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
}
.toggle input { accent-color: #ff2d55; }

/* --- Pick-a-brush overlay --- */
#picker-overlay {
  position: fixed;
  inset: 0;
  z-index: 10;
  cursor: crosshair;
  background: rgba(0, 0, 0, 0.15);
  backdrop-filter: blur(2px) saturate(1.2);
  -webkit-backdrop-filter: blur(2px) saturate(1.2);
}

.picker-msg {
  position: absolute;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--fg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.picker-msg kbd {
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.12);
  font-size: 11px;
  font-family: inherit;
  border: 1px solid var(--border);
}

.pick-highlight {
  outline: 2px solid #0a84ff !important;
  outline-offset: 2px !important;
  box-shadow: 0 0 0 6px rgba(10, 132, 255, 0.25) !important;
  transition: outline-color 0.1s ease;
}

/* --- Shatter layer --- */
#shatter-layer {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  overflow: hidden;
  /* Mirrored same as the video/canvas so tile coordinates line up. */
  transform: scaleX(-1);
}

.shard {
  position: absolute;
  will-change: transform, opacity;
  /* Smooth hand-off between tile and the ink underneath. */
  image-rendering: auto;
}

@keyframes shard-fall {
  to {
    transform:
      translate(var(--dx), var(--dy))
      rotate(var(--rot))
      scale(var(--scale));
    opacity: 0;
  }
}