/* /games/assets/base.css
 * 六个小游戏共用的设计系统（浅色板，与 2048 同源）。
 * 各游戏的 style.css 只需写自己那部分，页面骨架、HUD、按钮、遮罩都用这里的类。
 */

:root {
  /* 页面 */
  --bg: #f8ffe5;
  --ink: #555;
  --muted: #9a9a95;
  --accent: #1b9aaa;
  --accent-hover: #14727e;
  --accent-press: #0d4a52;
  /* 强调色家族（与 2048 同源） */
  --c1: #ffc43d; /* 黄 */
  --c2: #ef476f; /* 玫红 */
  --c3: #1b9aaa; /* 青 */
  --c4: #06d6a0; /* 绿 */
  --c5: #f37694;
  --c6: #22c2d6;
  --c7: #ffd470;
  --c8: #14727e;
  /* 棋盘/画布 */
  --cell: #f8ffe5;
  --frame: #9a9a95;
  --surface: #fffdf2;
  --radius: 3px;
}

* { box-sizing: border-box; }
html, body { overflow-x: hidden; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", Helvetica, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- 页面骨架 ---------- */

.app {
  max-width: 560px;
  margin: 0 auto;
  padding: 24px 16px 40px;
  text-align: center;
}

.app-head { display: flex; flex-direction: column; align-items: center; gap: 10px; }

/* 标题：每个字一个色块 */
.app-title { display: flex; justify-content: center; gap: 6.4px; margin: 0; font-weight: 400; }
.app-title span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius);
  color: #f8ffe5;
  font-size: 1.5rem;
  line-height: 1;
}
.app-title span:nth-child(4n + 1) { background: var(--c1); }
.app-title span:nth-child(4n + 2) { background: var(--c2); }
.app-title span:nth-child(4n + 3) { background: var(--c3); }
.app-title span:nth-child(4n + 4) { background: var(--c4); }

.back {
  color: var(--accent);
  font-size: 0.9rem;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}
.back:hover { color: var(--accent-hover); }

.directions {
  margin: 18px 0 0;
  padding: 12px 0;
  border-top: 1px solid var(--muted);
  border-bottom: 1px solid var(--muted);
  font-size: 0.95rem;
}
.directions strong { font-weight: 700; }
.directions p { margin: 0; }

/* ---------- HUD ---------- */

.hud {
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 26px;
  margin: 16px 0;
  font-size: 1rem;
}
.hud b {
  margin-left: 6px;
  font-size: 1.4rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.hud-item { position: relative; white-space: nowrap; }
.hud-best { color: var(--muted); }

/* 得分飘字：给 .float 加 .on 触发一次 */
.float {
  position: absolute;
  left: 108%;
  top: 0;
  color: var(--accent);
  font-size: 0.9rem;
  opacity: 0;
  pointer-events: none;
}
.float.on { animation: float-up 0.8s ease-in-out; }

/* ---------- 游戏区域 ---------- */

/* 灰色外框 + 奶油格子：网格类游戏（贪吃蛇 / 俄罗斯方块 / 五子棋）统一用它 */
.frame {
  display: inline-block;
  padding: 7px;
  background: var(--frame);
  border-radius: var(--radius);
}

.stage {
  position: relative;
  margin: 0 auto;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.pad { display: none; justify-content: center; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.pad button {
  font: inherit;
  font-size: 1rem;
  min-width: 52px;
  padding: 0.5em 0.9em;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--muted);
  border-radius: var(--radius);
  cursor: pointer;
  touch-action: manipulation;
}
.pad button:active { background: var(--muted); color: #fff; }
@media (hover: none) and (pointer: coarse) { .pad { display: flex; } }

/* ---------- 按钮 / 提示 / 遮罩 ---------- */

.actions { margin-top: 20px; }

.btn {
  font: inherit;
  font-size: 1rem;
  font-weight: 300;
  letter-spacing: 1px;
  padding: 0.9em 1.5em;
  color: #fff;
  background: var(--accent);
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
}
.btn:hover { background: var(--accent-hover); }
.btn:active { background: var(--accent-press); }
.btn:focus-visible { outline: none; box-shadow: inset 0 0 10px var(--accent-press); }

.hint { margin: 12px 0 0; color: var(--muted); font-size: 0.85rem; }

.overlay {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px;
  background: rgba(85, 85, 85, 0.9);
  color: #fff;
  border-radius: var(--radius);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease-in-out, visibility 0.3s;
}
.overlay.on { opacity: 1; visibility: visible; }
.overlay-emoji { font-size: 3rem; line-height: 1; }
.overlay-title { font-size: 2rem; line-height: 1.2; }
.overlay-sub { font-size: 0.95rem; opacity: 0.9; }

/* ---------- 动画 ---------- */

@keyframes float-up {
  0% { opacity: 1; top: 0; }
  100% { opacity: 0; top: -100%; }
}

@keyframes pop {
  0% { transform: scale(0.5); opacity: 0; }
  90% { transform: scale(1.1); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes shrink {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.9; }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* ---------- 响应式 ---------- */

@media (max-width: 440px) {
  .app { padding: 18px 12px 32px; }
  .app-title span { width: 2.6rem; height: 2.6rem; font-size: 1.3rem; }
  .hud { gap: 18px; }
}