:root {
  --bg: #0f172a;
  --card: #111827;
  --line: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #22d3ee;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, #1e293b, #0b1020 60%);
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
}

.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  display: grid;
  gap: 16px;
}

.card {
  background: rgba(17, 24, 39, 0.92);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
}

h1, h2, h3 {
  margin: 0 0 12px;
}

.subtitle {
  color: var(--muted);
  margin: 4px 0 0;
}

.row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 10px;
}

button {
  background: #1f2937;
  color: #e5e7eb;
  border: 1px solid #4b5563;
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

.grid-wrap {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.viewer-column {
  min-width: 320px;
  flex: 1;
}

.viewer-column.wide {
  min-width: 420px;
}

.twisty-box {
  background: #0b1220;
  border: 1px solid #475569;
  border-radius: 12px;
  min-height: 320px;
  height: 360px;
  overflow: hidden;
  padding: 8px;
}

twisty-player {
  width: 100%;
  height: 100%;
}

.square-map {
  display: grid;
  grid-template-columns: repeat(3, minmax(120px, 1fr));
  gap: 12px;
}

.face-card {
  border: 1px solid #475569;
  border-radius: 10px;
  padding: 8px;
}

.face-card-title {
  font-weight: 600;
  margin-bottom: 8px;
}

.face-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
}

.sticker {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 4px;
  border: 1px solid #0f172a;
}

.panel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.mono {
  font-family: Consolas, monospace;
  word-break: break-all;
  color: #cbd5e1;
}

.status {
  color: var(--muted);
}

.face-legend {
  margin: 0 0 10px;
  font-size: 13px;
}

.timeline-row {
  margin-top: 10px;
}

#timeline {
  flex: 1;
  min-width: 180px;
}

#timeline:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.step-list {
  max-height: 280px;
  overflow: auto;
  padding-left: 20px;
}

.step-list li {
  margin-bottom: 8px;
}

.step-list li.active {
  color: #67e8f9;
  font-weight: 600;
}

.step-list li.locked {
  color: #64748b;
}

.lock-badge {
  color: #fbbf24;
}

input {
  background: #0f172a;
  color: #e5e7eb;
  border: 1px solid #475569;
  border-radius: 8px;
  padding: 8px;
}

.leaderboard {
  margin: 0;
  padding-left: 18px;
}

@media (max-width: 960px) {
  .panel-grid {
    grid-template-columns: 1fr;
  }

  .twisty-box {
    height: 300px;
  }
}