/* ==========================================================================
   brain-games 共享样式（深色玻璃拟态 + 霓虹强调色）
   所有游戏页统一引用：../../css/base.css
   ========================================================================== */
:root {
  --bg: #eef4ff;
  --bg-2: #e7edfb;
  --panel: rgba(255, 255, 255, 0.9);
  --panel-solid: #ffffff;
  --line: rgba(54, 78, 130, 0.16);
  --line-strong: rgba(54, 78, 130, 0.34);
  --text: #1d2a44;
  --text-dim: #52627e;
  --text-faint: #6d7e9c;
  --accent: #356cf0;
  --accent-2: #7d5ce7;
  --ok: #168b63;
  --warn: #b66a00;
  --bad: #d23f53;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 16px 36px rgba(54, 78, 130, 0.14);
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Consolas, monospace;
  --sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

/* 关键：hidden 必须无条件生效（.overlay/.stage 等用了 display:flex，会覆盖默认 hidden） */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(1100px 620px at 12% -12%, rgba(53, 108, 240, 0.11), transparent 60%),
    radial-gradient(900px 560px at 92% 4%, rgba(125, 92, 231, 0.10), transparent 62%),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

body {
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--accent); text-decoration: none; }

/* ---------- 顶部条 ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  position: sticky;
  top: 0;
  z-index: 30;
}
.topbar .back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid var(--line);
  color: var(--text-dim);
  font-size: 16px;
  transition: .18s;
}
.topbar .back:hover { color: var(--text); border-color: var(--line-strong); background: rgba(53,108,240,.08); }
.topbar h1 {
  margin: 0;
  font-size: 17px;
  font-weight: 650;
  letter-spacing: .3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar .tag {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--text-faint);
  white-space: nowrap;
}
.topbar .spacer { flex: 1; }
.topbar .tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 12px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: rgba(54,78,130,.045);
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  transition: .18s;
}
.topbar .tool-btn:hover { color: var(--text); border-color: var(--line-strong); }
.topbar .tool-btn.on { color: var(--accent); border-color: rgba(67,208,255,.5); background: rgba(67,208,255,.1); }

/* ---------- 主体 ---------- */
.stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 22px 16px 40px;
  gap: 18px;
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
}

/* HUD：分数 / 关卡 / 时间 / 生命 */
.hud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  width: 100%;
  justify-content: center;
}
.hud .cell {
  min-width: 92px;
  padding: 9px 16px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--panel);
  text-align: center;
  line-height: 1.25;
}
.hud .cell .k {
  display: block;
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: .5px;
  margin-bottom: 2px;
}
.hud .cell .v {
  display: block;
  font-size: 19px;
  font-weight: 700;
  font-family: var(--mono);
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.hud .cell.ok .v { color: var(--ok); }
.hud .cell.warn .v { color: var(--warn); }
.hud .cell.bad .v { color: var(--bad); }

/* 面板 */
.panel {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 22px;
  position: relative;
  overflow: hidden;
}
.panel.flush { padding: 0; }

/* 开始 / 结算 覆盖层 */
.overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
  padding: 46px 24px;
}
.overlay .big { font-size: 30px; font-weight: 800; letter-spacing: .5px; }
.overlay .lead { color: var(--text-dim); font-size: 14px; line-height: 1.75; max-width: 560px; }
.overlay .lead b { color: var(--accent); font-weight: 600; }
.overlay .rules {
  text-align: left;
  max-width: 560px;
  width: 100%;
  margin: 6px 0 4px;
  padding: 14px 16px 14px 30px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(54,78,130,.035);
  color: var(--text-dim);
  font-size: 13.5px;
  line-height: 1.9;
}
.overlay .rules li::marker { color: var(--accent); }
.overlay .emoji { font-size: 56px; line-height: 1; }

/* 按钮 */
.btn {
  appearance: none;
  border: 0;
  cursor: pointer;
  font-family: inherit;
  font-size: 15px;
  font-weight: 650;
  letter-spacing: .4px;
  padding: 13px 34px;
  border-radius: 12px;
  color: #06121c;
  background: linear-gradient(135deg, var(--accent), #63e2ff 45%, var(--accent-2));
  box-shadow: 0 10px 26px rgba(67, 208, 255, 0.28);
  transition: transform .14s, box-shadow .14s, filter .14s;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 14px 32px rgba(67, 208, 255, 0.36); filter: brightness(1.05); }
.btn:active { transform: translateY(1px) scale(.99); }
.btn.ghost {
  background: rgba(54,78,130,.055);
  color: var(--text);
  border: 1px solid var(--line-strong);
  box-shadow: none;
}
.btn.ghost:hover { background: rgba(255,255,255,.08); box-shadow: none; }
.btn.sm { padding: 8px 16px; font-size: 13px; border-radius: 9px; }
.btn[disabled] { opacity: .45; cursor: not-allowed; transform: none; }

/* 结算数据表 */
.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin: 4px 0 6px;
}
.stats .item {
  min-width: 118px;
  padding: 12px 18px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(54,78,130,.045);
}
.stats .item .k { display: block; font-size: 11px; color: var(--text-faint); margin-bottom: 4px; letter-spacing: .5px; }
.stats .item .v { display: block; font-size: 22px; font-weight: 800; font-family: var(--mono); }
.stats .item .v small { font-size: 12px; font-weight: 500; color: var(--text-faint); margin-left: 3px; }

/* 进度条 */
.progress {
  width: 100%;
  max-width: 460px;
  height: 8px;
  border-radius: 999px;
  background: rgba(54,78,130,.09);
  overflow: hidden;
}
.progress > i {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width .25s ease;
}

/* 通用网格单元 */
.grid-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(54,78,130,.055);
  color: var(--text);
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background .12s, transform .12s, border-color .12s, color .12s;
  font-family: var(--mono);
}
.grid-cell:hover { background: rgba(53,108,240,.12); }
.grid-cell:active { transform: scale(.96); }
.grid-cell.hidden-cell { background: rgba(54,78,130,.09); color: transparent; }
.grid-cell.done { background: rgba(22,139,99,.12); border-color: rgba(46,230,168,.4); color: var(--ok); cursor: default; }
.grid-cell.wrong { animation: shake .34s; background: rgba(210,63,83,.14); border-color: rgba(255,93,108,.55); }
.grid-cell.pick { background: rgba(53,108,240,.16); border-color: rgba(67,208,255,.6); color: var(--accent); }
.grid-cell.fixed { background: rgba(54,78,130,.045); color: var(--text-dim); }
.grid-cell.hint { color: var(--accent); }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  22% { transform: translateX(-5px); }
  55% { transform: translateX(5px); }
  80% { transform: translateX(-3px); }
}
@keyframes pop {
  0% { transform: scale(.6); opacity: 0; }
  60% { transform: scale(1.06); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 提示条 */
.toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  transform: translateX(-50%) translateY(12px);
  padding: 11px 22px;
  border-radius: 12px;
  background: rgba(29, 42, 68, .96);
  border: 1px solid var(--line-strong);
  color: var(--text);
  font-size: 13.5px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: .26s;
  z-index: 90;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* 键盘提示 */
kbd {
  display: inline-block;
  min-width: 22px;
  padding: 2px 7px;
  border-radius: 6px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  background: rgba(255,255,255,.06);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text);
  text-align: center;
}

.hintline { color: var(--text-faint); font-size: 12.5px; text-align: center; line-height: 1.8; }
.hintline b { color: var(--text-dim); font-weight: 600; }

/* 底部小字 */
.foot {
  padding: 10px 20px 22px;
  text-align: center;
  color: #647493;
  font-size: 11.5px;
  letter-spacing: .3px;
}

@media (max-width: 560px) {
  .stage { padding: 14px 10px 30px; gap: 14px; }
  .panel { padding: 16px; border-radius: 14px; }
  .topbar { padding: 11px 12px; gap: 8px; flex-wrap: nowrap; }
  .topbar h1 { font-size: 14.5px; }
  /* 手机上空间紧张：隐藏「最佳」按钮与分类标签，避免标题被挤换行 */
  .topbar [data-act="best"], .topbar .tag { display: none; }
  .topbar .tool-btn { padding: 0 9px; font-size: 12px; height: 30px; white-space: nowrap; }
  .overlay { padding: 30px 14px; }
  .overlay .big { font-size: 22px; }
  .btn { padding: 12px 26px; font-size: 14.5px; }
  .hud .cell { min-width: 76px; padding: 8px 12px; }
  .hud .cell .v { font-size: 17px; }
}