/* ============================================================
   小游戏 · 公共样式
   纯静态，无外部字体 / 图标 / 框架
   ============================================================ */

:root{
  --bg:#0b0f14;
  --panel:#111823;
  --panel-2:#0e141b;
  --line:#1c2634;
  --line-2:#26323f;
  --text:#e6edf3;
  --muted:#8b98a5;
  --accent:#5ef2a0;
  --radius:16px;
  color-scheme:dark;
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{
  margin:0;
  min-height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:20px;
  background:
    radial-gradient(900px 520px at 50% -20%, #16222e 0%, transparent 62%),
    var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:14px;
  line-height:1.5;
}
a{color:inherit;text-decoration:none}
button,input,select{font-family:inherit}
.hidden{display:none !important}
::selection{background:rgba(94,242,160,.24)}
a:focus-visible,button:focus-visible,select:focus-visible,input:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;
}

/* ---------- 首页 ---------- */
.page{margin:auto;width:min(100%,860px);padding:12px 0}
.kicker{margin:0 0 10px;font-size:11px;letter-spacing:.22em;color:var(--accent);text-transform:uppercase}
.hero h1{margin:0;font-size:42px;letter-spacing:.06em;font-weight:700;line-height:1.15}
.hero .sub{margin:12px 0 26px;color:var(--muted);font-size:14px;line-height:1.75;max-width:46em}
.hero .sub b{color:var(--text);font-weight:600}

.group{margin-top:26px}
.group-title{
  display:flex;align-items:center;gap:10px;
  margin:0 0 12px;font-size:11px;font-weight:500;
  letter-spacing:.2em;color:var(--muted);text-transform:uppercase;
}
.group-title::after{content:"";flex:1;height:1px;background:var(--line)}

.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(196px,1fr));gap:14px}
.tile{
  position:relative;
  display:flex;flex-direction:column;
  padding:20px;border-radius:var(--radius);
  background:linear-gradient(180deg,#131b26,#0f151d);
  border:1px solid var(--line);
  transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease;
}
.tile::before{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:radial-gradient(240px 120px at 12% 0%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 70%);
}
.tile:hover{transform:translateY(-3px);border-color:var(--line-2);border-color:color-mix(in srgb, var(--accent) 45%, var(--line));box-shadow:0 18px 40px rgba(0,0,0,.35)}
.tile:active{transform:translateY(-1px)}
.tile .icon{
  display:flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:14px;font-size:20px;line-height:1;
  background:#0f151d;
  background:linear-gradient(160deg, color-mix(in srgb, var(--accent) 22%, #0f151d), #0f151d);
  border:1px solid var(--line);
  border-color:color-mix(in srgb, var(--accent) 30%, var(--line));
}
.tile h2{margin:14px 0 5px;font-size:16px;font-weight:600;letter-spacing:.02em}
.tile p{margin:0 0 12px;color:var(--muted);font-size:12.5px;line-height:1.7;flex:1}
.tile .meta{display:block;margin:0 0 8px;font-size:11.5px;line-height:1.5;letter-spacing:.04em;color:var(--muted)}
.tile .go{font-size:12.5px;color:var(--accent)}
.tile-random{
  background:linear-gradient(160deg,#13231d,#0f151d 65%);
  border-color:#234235;
  border-color:color-mix(in srgb, var(--accent) 28%, var(--line));
}

.records{
  margin:0 0 24px;padding:13px 15px;
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(180deg,#111923,#0d131a);
}
.records-head{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-bottom:9px;font-size:11px;letter-spacing:.14em;color:var(--muted);
}
.records-list{display:flex;flex-wrap:wrap;gap:7px}
.record{
  display:inline-flex;align-items:baseline;gap:6px;
  padding:5px 10px;border:1px solid var(--line);border-radius:999px;
  background:#0f151d;color:var(--muted);font-size:12px;line-height:1.3;
}
.record b{font-size:12.5px;font-weight:600;color:var(--text);font-variant-numeric:tabular-nums}
.record-continue{
  border-color:var(--line-2);
  border-color:color-mix(in srgb, var(--accent) 42%, var(--line));
  color:var(--accent);
  background:#0f1a16;
  background:color-mix(in srgb, var(--accent) 8%, #0f151d);
}
.record-continue b{color:var(--accent)}
.record-continue:hover{border-color:var(--accent)}

.page footer{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;margin-top:30px;color:var(--muted);font-size:12px;line-height:1.8}
.page footer code{font-size:11px;color:var(--text)}
.page footer .foot-links{display:flex;gap:14px;margin-left:auto}
.page footer a{transition:color .14s ease}
.page footer a:hover{color:var(--accent)}

/* ---------- 关于页 ---------- */
.about-page{width:min(100%,720px)}
.about-page .sub{max-width:44em}
.about-section{margin-top:26px;padding-top:20px;border-top:1px solid var(--line)}
.about-section h2{margin:0 0 8px;font-size:15px;font-weight:600;letter-spacing:.02em}
.about-section p{margin:0 0 12px;color:var(--muted);font-size:13px;line-height:1.9}
.about-section p:last-child{margin-bottom:0}
.about-section b{color:var(--text);font-weight:600}
.about-list{margin:0;padding-left:1.2em;color:var(--muted);font-size:13px;line-height:1.9}
.about-list li{margin:2px 0}
.about-actions{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;margin-top:14px}
.about-status{font-size:12px;color:var(--muted)}
.about-status.ok{color:var(--accent)}

/* ---------- 游戏页骨架 ---------- */
.game{margin:auto;width:min(100%,560px);padding:6px 0}
.game.wide{width:min(100%,780px)}
.game-head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin:0 4px 12px}
.back{
  display:inline-block;font-size:13px;line-height:1.4;color:var(--muted);
  padding:4px 6px;border-radius:6px;
  transition:color .14s ease,background .14s ease;
}
.game-head .back{margin:-4px 0 0 -6px}
.back:hover{color:var(--accent);background:rgba(255,255,255,.035)}
.game-more{display:flex;flex-wrap:wrap;align-items:center;gap:4px 10px;margin:18px 0 2px;padding-top:10px;border-top:1px solid var(--line)}
.game-more .back:last-child{margin-left:auto}
.game-head h1{margin:2px 0 0;font-size:20px;letter-spacing:.1em;font-weight:600}
.scores{display:flex;gap:16px;font-size:11px;letter-spacing:.06em;color:var(--muted);text-align:right}
.scores b{display:block;font-size:18px;font-weight:600;color:var(--text);font-variant-numeric:tabular-nums;line-height:1.3}
.scores b.accent{color:var(--accent)}

.stage{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);
  background:var(--panel-2);
  box-shadow:0 18px 50px rgba(0,0,0,.45), inset 0 0 0 1px rgba(255,255,255,.02);
}
canvas{display:block;width:100%;height:auto;touch-action:none}

/* 覆盖层 */
.overlay{
  position:absolute;inset:0;z-index:5;
  display:flex;align-items:center;justify-content:center;
  background:rgba(8,12,17,.74);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  transition:opacity .18s ease;
}
.overlay.hidden{display:none}
.ov-card{text-align:center;padding:24px;max-width:320px}
.ov-card h2{margin:0 0 8px;font-size:22px;font-weight:600}
.ov-card p{margin:0 0 18px;color:var(--muted);font-size:13px;line-height:1.75}
.ov-card .tiny{margin:12px 0 0;font-size:11.5px;color:var(--muted)}
.ov-card button{
  appearance:none;border:0;cursor:pointer;
  padding:11px 26px;border-radius:999px;
  background:var(--accent);
  background:linear-gradient(180deg, color-mix(in srgb, var(--accent) 82%, #fff), var(--accent));
  color:#06120b;font-size:14px;font-weight:700;letter-spacing:.04em;
  box-shadow:0 8px 24px rgba(0,0,0,.35);
  box-shadow:0 8px 24px color-mix(in srgb, var(--accent) 28%, transparent);
  transition:transform .12s ease, box-shadow .12s ease, filter .12s ease;
}
.ov-card button:hover{filter:brightness(1.06)}
.ov-card button:active{transform:translateY(1px) scale(.99)}

/* 控件 */
.controls{margin-top:12px;display:grid;gap:10px}
.row{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.btn{
  appearance:none;cursor:pointer;
  border:1px solid var(--line);
  background:var(--panel);
  color:var(--text);
  border-radius:10px;
  padding:9px 14px;
  font-size:13px;
  transition:border-color .14s ease,background .14s ease;
}
.btn:hover{border-color:var(--line-2);border-color:color-mix(in srgb, var(--accent) 50%, var(--line))}
.btn:active{background:#182231}
.btn:disabled{opacity:.4;cursor:default}
.btn.primary{
  background:var(--accent);
  background:linear-gradient(180deg, color-mix(in srgb, var(--accent) 80%, #fff), var(--accent));
  border-color:transparent;color:#06120b;font-weight:700;
}
select{
  appearance:none;
  background:var(--panel) url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%238b98a5' stroke-width='1.4'/%3E%3C/svg%3E") no-repeat right 11px center/9px 6px;
  color:var(--text);
  border:1px solid var(--line);
  border-radius:10px;
  padding:9px 30px 9px 12px;
  font-size:13px;
  cursor:pointer;
}
.field{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted)}
input[type=range]{width:130px;accent-color:var(--accent);cursor:pointer}
input[type=checkbox]{accent-color:var(--accent)}

/* 方向键 / 触屏按钮 */
.pad{margin:14px auto 0;display:none;justify-content:center;flex-wrap:wrap;gap:8px}
.pad.dpad{display:none;grid-template-columns:repeat(3,1fr);width:min(224px,72%)}
.pad button{
  appearance:none;cursor:pointer;
  border:1px solid var(--line);
  background:var(--panel);color:var(--text);
  border-radius:12px;padding:13px 0;min-width:54px;
  font-size:15px;line-height:1;
  user-select:none;-webkit-user-select:none;
  transition:background .12s ease,border-color .12s ease;
}
.pad button:active{background:#182231;border-color:var(--line-2)}
.pad button .lbl{display:block;margin-top:5px;font-size:10.5px;letter-spacing:.08em;color:var(--muted)}
.pad .empty{visibility:hidden}
@media (any-pointer:coarse){
  .pad{display:flex}
  .pad.dpad{display:grid}
}

.hint{margin:14px 4px 0;text-align:center;font-size:12.5px;color:var(--muted);line-height:1.9}
.hint kbd{
  font-family:inherit;font-size:11px;color:var(--text);
  border:1px solid var(--line);border-bottom-width:2px;
  border-radius:5px;padding:1px 6px;background:var(--panel);
}

@media (max-width:600px){
  body{padding:14px}
  .hero h1{font-size:32px}
  .tiles{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
  .tile{padding:16px}
  .tile p{font-size:12.5px}
  .records{padding:11px 12px}
  .records-head{font-size:11px}
}
@media (max-width:420px){
  .tiles{grid-template-columns:1fr 1fr}
  .tile .icon{width:38px;height:38px;font-size:17px}
  .tile h2{font-size:14px}
  .game-head h1{font-size:18px}
  .scores{gap:12px}
  .scores b{font-size:16px}
  .page footer .foot-links{margin-left:0;width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
}