:root {
  --bg: #0f172a;         /* slate-900 */
  --panel: #111827;      /* gray-900 */
  --muted: #94a3b8;      /* slate-400 */
  --text: #e5e7eb;       /* gray-200 */
  --accent: #22d3ee;     /* cyan-400 */
  --accent-2: #a78bfa;   /* violet-400 */
  --danger: #ef4444;     /* red-500 */
  --ok: #34d399;         /* emerald-400 */
  --radius: 12px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 1200px at 20% -10%, #1f2937, transparent), var(--bg);
}

.app-header {
  padding: 24px 16px 8px;
  text-align: center;
}
.app-header h1 { margin: 0 0 6px; font-size: 28px; letter-spacing: 0.5px; }
.subtitle { margin: 0; color: var(--muted); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 900px) {
  .container { grid-template-columns: 1fr 1fr; align-items: start; }
}

.panel {
  background: linear-gradient(180deg, #0b1020, #0a0f1e);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(0,0,0,0.35), inset 0 1px 0 rgba(255,255,255,0.03);
  padding: 14px;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.panel-head h2 { margin: 0; font-size: 18px; letter-spacing: 0.3px; }

.actions, .controls {
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
}

.btn {
  background: #1f2937;
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: transform .06s ease, background .2s ease, border-color .2s ease;
}
.btn:hover { transform: translateY(-1px); border-color: rgba(255,255,255,0.2); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn.primary { background: linear-gradient(90deg, var(--accent), var(--accent-2)); color: #0b1020; border-color: transparent; }
.btn.danger { background: #2b1b1b; color: #fecaca; border-color: rgba(239, 68, 68, 0.4); }

.dropzone {
  border: 2px dashed rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 22px;
  text-align: center;
  color: var(--muted);
  outline: none;
}
.dropzone:focus { border-color: var(--accent); }
.dropzone.dragover { border-color: var(--ok); background: rgba(16,185,129,0.08); }
.dropzone-inner { display: inline-flex; gap: 14px; align-items: center; }
.dropzone .icon { font-size: 28px; }
.dropzone .title { font-weight: 600; color: var(--text); }
.dropzone .hint { font-size: 12px; }

.gallery {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 12px;
}
.card {
  background: #0b1020;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  overflow: hidden;
}
.card .thumb { aspect-ratio: 1/1; width: 100%; object-fit: cover; display: block; }
.card .meta { display: flex; align-items: center; justify-content: space-between; gap: 6px; padding: 6px 8px; }
.card .name { font-size: 12px; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card .remove { font-size: 12px; color: #fecaca; background: transparent; border: none; cursor: pointer; }

.card .name[contenteditable="true"] {
  outline: 1px dashed rgba(255,255,255,0.25);
  border-radius: 6px;
  padding: 2px 4px;
}

.stage {
  margin-top: 8px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.06);
  background: radial-gradient(500px 240px at 50% -50%, rgba(34,211,238,0.15), transparent), #070b17;
  position: relative;
  display: grid;
  place-items: center;
  min-height: 340px;
}
.stage-inner { text-align: center; padding: 16px; }
.stage img { max-width: min(460px, 90vw); max-height: 320px; border-radius: 12px; display: none; }
.stage .name { margin-top: 10px; font-size: 20px; letter-spacing: 0.3px; min-height: 1em; }
.stage.running { animation: pulse 0.8s ease-in-out infinite; }

.confetti-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 rgba(34,211,238,0.0); }
  50% { box-shadow: 0 0 40px rgba(34,211,238,0.25); }
  100% { box-shadow: 0 0 0 rgba(34,211,238,0.0); }
}

.picker-actions { display: flex; gap: 8px; margin-top: 10px; }
.remaining { margin-left: auto; color: var(--muted); font-size: 13px; align-self: center; }

.control { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); }
.control input[type="range"] { width: 140px; }
.control .value { color: var(--text); min-width: 40px; text-align: right; font-variant-numeric: tabular-nums; }

.app-footer { color: var(--muted); text-align: center; padding: 24px 12px 40px; }