:root{
  --bg:#FFFCF6; --card:#fff; --ink:#2B2118; --text:#5B5245; --mute:#857A6B;
  --line:#EFE6D8; --sun:#F59E0B; --red:#DC2626; --blue:#0EA5E9; --radius:18px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;min-height:100%}
body{
  background:radial-gradient(1200px 600px at 80% -10%, #FFEDD5 0%, transparent 60%), var(--bg);
  color:var(--ink); font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;
  padding:16px 14px 30px; display:flex; justify-content:center;
}
.app{width:100%;max-width:980px}

.brand{display:flex;align-items:center;gap:12px;margin:4px 2px 18px}
.logo{width:52px;height:52px;border-radius:16px;flex:none;text-decoration:none;
  background:linear-gradient(135deg,#FB923C,#EA580C);display:grid;place-items:center;
  color:#fff;font-size:24px;font-weight:900;box-shadow:0 6px 16px rgba(234,88,12,.32)}
.brand h1{margin:0;font-size:22px}
.brand p{margin:3px 0 0;font-size:12.5px;color:var(--mute)}

/* ---------- 选尺寸 ---------- */
.intro{background:linear-gradient(135deg,#FFF4E0,#FFE8CC);border:1px solid #F5D6A8;
  border-radius:18px;padding:15px 18px;margin-bottom:16px}
.intro b{display:block;font-size:15px;margin-bottom:4px}
.intro span{font-size:13px;color:#8A5A12;line-height:1.7}

.sizes{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.sz{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;cursor:pointer;
  text-align:left;font-family:inherit;box-shadow:0 6px 18px rgba(120,95,60,.08);transition:.12s;
  display:flex;flex-direction:column;gap:8px}
.sz:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(120,95,60,.14)}
.sz b{font-size:17px}
.sz span{font-size:11.5px;color:var(--mute)}
.sz .rec{font-size:11px;font-weight:800;color:#047857;background:#E7F9F1;border-radius:999px;
  padding:3px 8px;align-self:flex-start}
.sz canvas,.sz .mini{width:100%;aspect-ratio:1/1;border-radius:8px;background:#FAF6EF;
  position:relative;overflow:hidden;border:1px solid #EFE3CF}
.sz .mini i{position:absolute;border-radius:2px;background:#FBBF24;color:#7C2D12;
  font-style:normal;font-size:11px;font-weight:800;display:grid;place-items:center;
  box-shadow:0 0 0 1.5px #FAF6EF, inset 0 -2px 0 rgba(0,0,0,.08)}

.resume{width:100%;margin-top:14px;border:1px dashed #C8B79B;background:#FFFBF2;border-radius:14px;
  padding:13px;font-size:14px;font-weight:700;color:#8A6A3B;cursor:pointer;font-family:inherit}

.stats{display:flex;gap:10px;margin-top:16px}
.stat{flex:1;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 14px}
.stat b{display:block;font-size:20px;color:#C2410C}
.stat span{font-size:11.5px;color:var(--mute)}

/* ---------- 游戏 ---------- */
#game{display:none}
#game.on{display:block}
.topbar{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.back{border:1px solid var(--line);background:#fff;border-radius:12px;padding:9px 13px;cursor:pointer;
  font-family:inherit;font-size:13px;font-weight:700;color:var(--text)}
.level{flex:1;font-size:14px;font-weight:800}
.meta{display:flex;gap:8px}
.pill{background:#FFEDD5;color:#9A3412;border-radius:999px;padding:6px 11px;font-size:12.5px;
  font-weight:800;font-variant-numeric:tabular-nums}
.pill.gray{background:#F6F2EA;color:var(--mute)}

.boardwrap{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:22px;align-items:start;
  background:#fff;border:1px solid var(--line);border-radius:22px;padding:16px;
  box-shadow:0 10px 30px rgba(120,95,60,.10)}

.board{position:relative;width:100%;max-width:min(460px,62vh);aspect-ratio:1/1;margin:0 auto;
  background:#F7EFE2;border:3px solid var(--ink);border-radius:14px;overflow:hidden}

.tile{position:absolute;padding:3px;transition:left .12s ease,top .12s ease;cursor:pointer;
  will-change:left,top}
.tile .in{width:100%;height:100%;border-radius:8px;display:grid;place-items:center;
  overflow:hidden;line-height:1;font-variant-numeric:tabular-nums;
  color:#3B2A14;font-weight:900;box-shadow:0 3px 8px rgba(120,80,30,.18),
  inset 0 -3px 0 rgba(0,0,0,.10), inset 0 2px 0 rgba(255,255,255,.45);
  background:linear-gradient(160deg,#FFE9B8,#F9C74F);user-select:none}
.tile.done .in{background:linear-gradient(160deg,#BBF7D0,#4ADE80);color:#065F46}
.tile.moved .in{animation:pop .18s ease}
@keyframes pop{0%{transform:scale(.94)}100%{transform:scale(1)}}

.side{display:flex;flex-direction:column;gap:12px}
.acts{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.acts button{border:1px solid var(--line);background:#fff;border-radius:12px;padding:12px 0;
  font-size:13.5px;font-weight:700;color:var(--text);cursor:pointer;font-family:inherit}
.acts button.primary{grid-column:span 2;background:#EA580C;border-color:#EA580C;color:#fff}
.acts button:disabled{opacity:.45}
.tips{font-size:12px;color:var(--mute);line-height:1.9;text-align:center}
.tips p{margin:0}
.msg{min-height:20px;font-size:13px;font-weight:700;color:var(--text);text-align:center}

/* ---------- 通关 ---------- */
.win{position:fixed;inset:0;background:rgba(43,33,24,.45);display:none;align-items:center;
  justify-content:center;padding:20px;z-index:50}
.win.on{display:flex}
.wincard{background:#fff;border-radius:24px;padding:28px 26px;max-width:380px;width:100%;text-align:center;
  box-shadow:0 20px 60px rgba(0,0,0,.25);animation:pop2 .22s ease-out}
@keyframes pop2{from{transform:scale(.92)}to{transform:scale(1)}}
.stars{font-size:38px;letter-spacing:6px;margin-bottom:6px;color:#F59E0B;line-height:1}
.stars .off{color:#E7DED0}
.wincard h2{margin:6px 0 8px;font-size:22px}
.wincard p{margin:0 0 18px;color:var(--text);font-size:13.5px;line-height:1.6}
.winbtn{width:100%;border:0;border-radius:14px;padding:14px;font-size:16px;font-weight:800;
  cursor:pointer;font-family:inherit;margin-bottom:8px}
.winbtn.main{background:#EA580C;color:#fff}
.winbtn.ghost{background:#F7F3EC;color:var(--text)}
.confetti{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:49}
.confetti i{position:absolute;width:9px;height:14px;border-radius:2px;animation:fall linear forwards}
@keyframes fall{to{transform:translateY(110vh) rotate(720deg);opacity:.9}}

footer{margin-top:18px;text-align:center;font-size:11.5px;color:var(--mute);line-height:1.8}

@media (max-width:820px){
  .sizes{grid-template-columns:repeat(2,1fr)}
  .boardwrap{grid-template-columns:1fr;gap:14px}
  .board{max-width:none}
  .side{order:2}
}
@media (max-width:420px){
  .sizes{grid-template-columns:repeat(2,1fr);gap:10px}
}