/* ===== 合成小镇 · 深色霓虹主题 ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #7c5cff;
  --cyan: #22d3ee;
  --pink: #ff5ca8;
  --amber: #ffb347;
  --text: #eef0ff;
  --text-dim: #a6abd4;
  --panel-bg: rgba(255, 255, 255, .06);
  --panel-border: rgba(255, 255, 255, .12);
}

html, body { height: 100%; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 50% 30%, #171a3a, #0b0e20);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-tap-highlight-color: transparent;
}

/* 背景细碎星点 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1.5px 1.5px at 18% 22%, rgba(255,255,255,.35), transparent 60%),
    radial-gradient(1.5px 1.5px at 72% 16%, rgba(34,211,238,.30), transparent 60%),
    radial-gradient(1px 1px at 40% 70%, rgba(255,255,255,.22), transparent 60%),
    radial-gradient(1.5px 1.5px at 86% 62%, rgba(255,92,168,.25), transparent 60%),
    radial-gradient(1px 1px at 8% 80%, rgba(255,179,71,.25), transparent 60%);
}

.app {
  position: relative;
  max-width: 580px;
  margin: 0 auto;
  padding: 12px 12px 20px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* 面板通用 */
.panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* ===== 顶部栏 ===== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 2px 12px;
}

.brand { display: flex; align-items: center; gap: 10px; }

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #5438d8);
  box-shadow: 0 4px 14px rgba(124, 92, 255, .45);
}

.brand-title {
  font-size: 21px;
  letter-spacing: 2px;
  background: linear-gradient(90deg, #fff, var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.back-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
  padding: 8px 12px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  transition: color .15s, border-color .15s, background .15s;
}
.back-link:hover { color: #fff; border-color: rgba(255,255,255,.3); background: rgba(255,255,255,.06); }

/* ===== HUD ===== */
.stage { flex: 1; display: flex; flex-direction: column; gap: 12px; }

.hud {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px 14px;
}

.score-box {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 72px;
}

.score-label { font-size: 12px; color: var(--text-dim); letter-spacing: 1px; }

.score-value {
  font-size: 22px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

#bestValue { color: var(--amber); }
#spaceValue { color: var(--cyan); }

.hud-actions { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; }

/* ===== 按钮 ===== */
.btn {
  position: relative;
  font-family: inherit;
  font-size: 14px;
  color: var(--text);
  background: rgba(255, 255, 255, .08);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 9px 14px;
  cursor: pointer;
  transition: transform .12s, box-shadow .15s, background .15s, opacity .15s;
  user-select: none;
}
.btn:hover:not(:disabled) { background: rgba(255,255,255,.14); }
.btn:active:not(:disabled) { transform: scale(.94); }
.btn:disabled { opacity: .38; cursor: default; }

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #5b3ee0);
  border-color: transparent;
  box-shadow: 0 6px 18px rgba(124, 92, 255, .4);
}
.btn-primary:hover:not(:disabled) { background: linear-gradient(135deg, #8d72ff, #6a4ef0); }

.btn-lg { padding: 13px 30px; font-size: 16px; border-radius: 14px; }

.btn-count {
  display: inline-grid;
  place-items: center;
  min-width: 19px;
  height: 19px;
  margin-left: 6px;
  padding: 0 5px;
  font-size: 12px;
  font-style: normal;
  font-weight: 700;
  border-radius: 10px;
  color: #0b0e20;
  background: var(--cyan);
  vertical-align: middle;
}

/* ===== 棋盘 ===== */
.board-wrap { display: flex; justify-content: center; }

.board {
  position: relative;
  width: min(92vw, 520px);
  padding: 10px;
}

.game-canvas {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  touch-action: none;
  cursor: pointer;
}

/* ===== 遮罩 ===== */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  border-radius: 20px;
  background: rgba(10, 12, 30, .72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 5;
  animation: overlayIn .25s ease;
}
.overlay.hidden { display: none; }

@keyframes overlayIn { from { opacity: 0; } to { opacity: 1; } }

.overlay-card {
  text-align: center;
  max-width: 420px;
}

.overlay-title {
  font-size: 30px;
  letter-spacing: 3px;
  margin-bottom: 14px;
  background: linear-gradient(90deg, var(--cyan), var(--primary), var(--pink));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.overlay-title.lose {
  background: linear-gradient(90deg, var(--amber), var(--pink));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.overlay-text {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-dim);
}
.overlay-text strong { color: var(--cyan); font-weight: 600; }
.overlay-text.sub { font-size: 13px; margin-top: 10px; }

.chain-legend {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  margin: 16px 0 4px;
}
.chain-legend span {
  font-size: 13px;
  padding: 4px 10px;
  border-radius: 999px;
  color: var(--c);
  border: 1px solid color-mix(in srgb, var(--c) 55%, transparent);
  background: color-mix(in srgb, var(--c) 12%, transparent);
  white-space: nowrap;
}
.chain-legend i { font-style: normal; color: var(--text-dim); font-size: 12px; }

.overlay-actions { margin-top: 22px; display: flex; justify-content: center; gap: 10px; }

.result-stats {
  margin-top: 6px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.result-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 18px;
  border-radius: 12px;
  background: rgba(255,255,255,.05);
  border: 1px solid var(--panel-border);
  font-size: 14px;
  color: var(--text-dim);
}
.result-row b { font-size: 20px; color: #fff; font-variant-numeric: tabular-nums; }
.result-row:last-child b { color: var(--amber); }

/* ===== 持有栏 ===== */
.holder { padding: 10px 14px 12px; }

.holder-head { text-align: center; margin-bottom: 4px; }
.holder-title { font-size: 12.5px; color: var(--text-dim); letter-spacing: 2px; }

.slots { display: flex; justify-content: center; align-items: flex-end; gap: 14px; }

.slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  opacity: .72;
}
.slot.is-current {
  opacity: 1;
  padding: 6px 12px 4px;
  border-radius: 16px;
  background: rgba(34, 211, 238, .08);
  border: 1px solid rgba(34, 211, 238, .45);
  box-shadow: 0 0 18px rgba(34, 211, 238, .18);
}

.slot-canvas { width: 64px; height: 64px; }
.slot-canvas-sm { width: 46px; height: 46px; }

.slot-name { font-size: 12.5px; color: var(--text-dim); }
.slot.is-current .slot-name { color: var(--cyan); font-weight: 600; }

/* ===== 底部说明 ===== */
.tips {
  text-align: center;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(166, 171, 212, .75);
  padding: 2px 6px 8px;
}

/* ===== 窄屏适配 ===== */
@media (max-width: 380px) {
  .app { padding: 10px 8px 16px; }
  .hud { gap: 8px; padding: 10px; }
  .score-box { min-width: 60px; }
  .score-value { font-size: 19px; }
  .btn { padding: 8px 11px; font-size: 13px; }
  .overlay-title { font-size: 26px; }
}

/* 非常矮的屏幕（横屏手机）压缩留白 */
@media (max-height: 720px) {
  .tips { display: none; }
  .holder { padding: 6px 14px 8px; }
}