:root{
  --bg:#08110f;
  --bg-2:#0d1b17;
  --ink:#eef4ec;
  --ink-soft:#9fb0a7;
  --ink-faint:#64786f;
  --line:rgba(176,224,203,.16);
  --line-2:rgba(176,224,203,.34);
  --brass:#c9a25e;
  --brass-2:#e8cd94;
  --brass-3:#8d6a33;
  --mint:#7ee0c3;
  --coral:#ff7a62;
}
*{box-sizing:border-box}
html,body{
  margin:0;height:100%;overflow:hidden;background:var(--bg);color:var(--ink);
  font-family:ui-rounded,'Avenir Next','Segoe UI',-apple-system,BlinkMacSystemFont,sans-serif;
  -webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;
  overscroll-behavior:auto;
}
canvas{position:fixed;inset:0;display:block;touch-action:none}
button{font-family:inherit}
[hidden]{display:none!important}

/* ---------------- HUD ---------------- */
#hud{
  position:fixed;inset:0;z-index:6;pointer-events:none;
  padding:calc(10px + env(safe-area-inset-top)) calc(12px + env(safe-area-inset-right)) 0 calc(12px + env(safe-area-inset-left));
  display:flex;justify-content:flex-start;align-items:flex-start;gap:8px;
  transition:opacity .3s;
}
body.menu-open #hud,body.menu-open #tools{opacity:0;visibility:hidden}
.chip{
  display:flex;align-items:baseline;gap:7px;line-height:1;
  background:linear-gradient(180deg,rgba(17,31,27,.92),rgba(9,18,15,.92));
  border:1px solid var(--line);border-radius:4px;
  padding:8px 11px;
  box-shadow:0 2px 0 rgba(0,0,0,.35),inset 0 1px 0 rgba(255,255,255,.04);
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  white-space:nowrap;
}
.chip .k{font-size:8px;letter-spacing:.22em;font-weight:700;color:var(--ink-faint)}
.chip b{font-size:16px;font-weight:800;letter-spacing:.02em;font-variant-numeric:tabular-nums}
.chip .total{font-size:8px;letter-spacing:.12em;color:var(--ink-faint)}
.chip .total i{font-style:normal}
.chip.moves b{color:var(--mint)}
.chip.best b{color:var(--brass-2)}
.right{display:flex;align-items:center;gap:7px;margin-left:auto}
.icon-btn{
  pointer-events:auto;width:34px;height:34px;border-radius:4px;cursor:pointer;
  border:1px solid var(--line);background:rgba(13,26,22,.92);color:var(--ink-soft);
  font-size:12px;font-weight:800;display:grid;place-items:center;
  box-shadow:0 2px 0 rgba(0,0,0,.35);
  transition:color .15s,border-color .15s,background .15s;
}
.icon-btn:hover{color:var(--ink);border-color:var(--line-2)}
.icon-btn:active{transform:translateY(1px);box-shadow:none}
.icon-btn.off{color:var(--coral);text-decoration:line-through}

/* ---------------- tools ---------------- */
#tools{
  position:fixed;left:50%;bottom:calc(12px + env(safe-area-inset-bottom));z-index:6;
  transform:translateX(-50%);display:flex;gap:7px;
  padding:7px;border-radius:6px;
  background:linear-gradient(180deg,rgba(16,29,25,.94),rgba(8,17,14,.94));
  border:1px solid var(--line);box-shadow:0 6px 18px rgba(0,0,0,.35),inset 0 1px 0 rgba(255,255,255,.04);
  transition:opacity .3s;
}
.tool{
  pointer-events:auto;cursor:pointer;min-width:62px;height:46px;padding:5px 9px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  border:1px solid transparent;border-radius:3px;background:transparent;color:var(--ink-soft);
  transition:background .15s,color .15s,border-color .15s;
}
.tool:hover{background:rgba(176,224,203,.07);color:var(--ink);border-color:var(--line)}
.tool:active{transform:translateY(1px)}
.tool:disabled{opacity:.34;cursor:default;transform:none}
.tool .ti{font-size:15px;line-height:1;color:var(--brass-2)}
.tool .tl{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:8px;letter-spacing:.1em;font-weight:700}

#toast{
  position:fixed;left:50%;bottom:calc(76px + env(safe-area-inset-bottom));z-index:9;
  transform:translate(-50%,8px);opacity:0;pointer-events:none;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:10px;font-weight:700;
  letter-spacing:.12em;color:var(--ink);background:rgba(12,24,20,.96);
  border:1px solid var(--line-2);border-radius:4px;padding:8px 14px;
  box-shadow:0 4px 14px rgba(0,0,0,.4);white-space:nowrap;
}
#toast.show{animation:toastIn 2.1s ease forwards}
@keyframes toastIn{
  0%{opacity:0;transform:translate(-50%,8px)}
  10%{opacity:1;transform:translate(-50%,0)}
  76%{opacity:1;transform:translate(-50%,0)}
  100%{opacity:0;transform:translate(-50%,-6px)}
}

/* ---------------- overlays ---------------- */
#curtain{
  position:fixed;inset:0;z-index:40;background:#050c0a;pointer-events:none;
  transform:translateY(-101%);transition:transform .22s cubic-bezier(.5,0,.2,1);
}
#curtain.down{transform:translateY(0)}

.overlay{
  position:fixed;inset:0;z-index:20;display:grid;place-items:center;padding:20px;
  background:
    radial-gradient(120% 80% at 50% 0%,rgba(30,58,48,.55),rgba(5,12,10,.94) 70%),
    rgba(5,12,10,.9);
  -webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);
  animation:veil .24s ease;
  overflow:auto;
}
@keyframes veil{from{opacity:0}to{opacity:1}}
.card{width:100%;max-width:420px;text-align:center;position:relative;padding:8px 0}
.card.wide{max-width:540px}
.crest{
  display:block;width:44px;height:44px;margin:0 auto 16px;color:var(--brass);
  filter:drop-shadow(0 0 12px rgba(201,162,94,.16));
}
.eyebrow{
  margin:0 0 14px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:9px;font-weight:700;letter-spacing:.34em;color:var(--brass);
}
.logo{
  margin:0;font-family:Georgia,'Iowan Old Style','Songti SC',serif;font-weight:700;
  font-size:clamp(48px,13.5vw,82px);line-height:.92;letter-spacing:.01em;color:var(--ink);
}
.logo.small{font-size:clamp(36px,10vw,56px)}
.logo .logo-en{display:block}
.logo .logo-en span{display:block;color:var(--mint);text-shadow:0 0 26px rgba(126,224,195,.22)}
.logo .logo-zh{display:none;letter-spacing:.16em}
html[lang="zh-CN"] .logo .logo-en{display:none}
html[lang="zh-CN"] .logo .logo-zh{display:block}
html[lang="zh-CN"] .logo{font-family:'Songti SC','STSong','Noto Serif SC',Georgia,serif}
.tag{
  margin:18px auto 0;font-size:13.5px;line-height:1.75;color:var(--ink-soft);max-width:404px;
}
.primary{
  pointer-events:auto;margin-top:22px;cursor:pointer;
  font-size:15px;font-weight:800;letter-spacing:.18em;color:#1c1407;
  background:linear-gradient(180deg,var(--brass-2),var(--brass));
  border:1px solid #6f5226;border-radius:3px;padding:13px 40px 14px;min-height:52px;
  box-shadow:0 4px 0 rgba(0,0,0,.38),inset 0 1px 0 rgba(255,255,255,.55);
  transition:transform .12s,box-shadow .12s,filter .15s;
}
.primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 5px 0 rgba(0,0,0,.36),inset 0 1px 0 rgba(255,255,255,.6)}
.primary:active{transform:translateY(2px);box-shadow:0 1px 0 rgba(0,0,0,.4)}
.primary .sub{
  display:block;margin-top:3px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:7.5px;letter-spacing:.3em;font-weight:700;color:#5a4218;
}
html:not([lang="zh-CN"]) .primary .sub{display:none}
.headline{
  margin:6px 0 0;font-family:Georgia,serif;font-size:clamp(28px,7vw,38px);font-weight:700;color:var(--ink);
}
.menu-row{display:flex;gap:8px;justify-content:center;margin-top:12px;flex-wrap:wrap}
.ghost{
  pointer-events:auto;cursor:pointer;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:10px;font-weight:700;letter-spacing:.16em;color:var(--ink-soft);
  background:transparent;border:1px solid var(--line);border-radius:3px;
  padding:11px 18px;min-height:40px;transition:background .15s,color .15s,border-color .15s;
}
.ghost:hover{background:rgba(176,224,203,.07);color:var(--ink);border-color:var(--line-2)}
.ghost.close{margin-top:18px}
.bestline{
  margin:16px 0 0;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:9px;letter-spacing:.22em;font-weight:700;color:var(--ink-faint);
}
.bestline b{color:var(--brass-2);font-size:13px}
.stats{display:flex;gap:34px;justify-content:center;margin:18px 0 0}
.stats div{display:flex;flex-direction:column;gap:6px}
.stats span{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:8.5px;letter-spacing:.2em;font-weight:700;color:var(--ink-faint)}
.stats b{font-family:Georgia,serif;font-size:34px;line-height:1;font-weight:700;font-variant-numeric:tabular-nums}
.stats div:first-child b{color:var(--mint)}
.stats div:last-child b{color:var(--brass-2)}
.newbest{
  display:none;margin:12px 0 0;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:9px;letter-spacing:.26em;font-weight:700;color:var(--brass-2);
}
.newbest.on{display:block;animation:pop .5s ease}
@keyframes pop{0%{transform:scale(.8);opacity:0}100%{transform:scale(1);opacity:1}}
.rules{
  list-style:none;margin:18px auto 0;padding:0;max-width:370px;text-align:left;
  display:flex;flex-direction:column;gap:11px;
  font-size:13px;line-height:1.6;color:var(--ink-soft);
}
.rules li{position:relative;padding-left:22px}
.rules li::before{
  content:"";position:absolute;left:4px;top:.62em;width:6px;height:6px;border-radius:50%;
  background:var(--brass);box-shadow:0 0 8px rgba(201,162,94,.5);
}
.level-grid{
  display:grid;grid-template-columns:repeat(8,1fr);gap:6px;margin:18px auto 16px;
  max-height:min(52vh,420px);overflow:auto;padding:4px;
  scrollbar-width:thin;scrollbar-color:var(--brass-3) transparent;
  -webkit-mask-image:linear-gradient(180deg,#000 0,#000 calc(100% - 22px),transparent 100%);
  mask-image:linear-gradient(180deg,#000 0,#000 calc(100% - 22px),transparent 100%);
}
.level-grid::-webkit-scrollbar{width:6px}
.level-grid::-webkit-scrollbar-thumb{background:var(--brass-3);border-radius:3px}
.lv{
  position:relative;cursor:pointer;aspect-ratio:1;min-height:34px;
  border:1px solid var(--line);border-radius:3px;background:rgba(13,26,22,.7);
  color:var(--ink-soft);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:11px;font-weight:700;display:grid;place-items:center;
  transition:border-color .15s,color .15s,background .15s;
}
.lv:hover{border-color:var(--line-2);color:var(--ink)}
.lv.done{color:var(--mint);border-color:rgba(126,224,195,.28)}
.lv.done::after{
  content:"";position:absolute;right:4px;top:4px;width:4px;height:4px;border-radius:50%;
  background:var(--mint);
}
.lv.now{border-color:var(--brass);color:var(--brass-2);background:rgba(201,162,94,.1)}

@media (max-height:660px){
  .eyebrow{margin-bottom:9px}
  .tag{margin-top:11px;font-size:12px;line-height:1.6}
  .primary{margin-top:14px;min-height:46px;padding:10px 34px 11px}
  .logo{font-size:clamp(38px,10.5vw,58px)}
  .logo.small{font-size:clamp(30px,8vw,44px)}
  .stats{margin-top:12px}
  .stats b{font-size:28px}
  .rules{gap:7px;font-size:12px;margin-top:12px}
}
@media (max-height:520px){
  .crest{width:30px;height:30px;margin-bottom:7px}
  .eyebrow{margin-bottom:5px}
  .logo{font-size:clamp(32px,7.4vw,44px)}
  .logo.small{font-size:clamp(28px,6.4vw,38px)}
  #menu .tag{display:none}
  .primary{margin-top:10px;min-height:42px;padding:8px 30px 9px}
  .menu-row{margin-top:8px}
  .bestline{margin-top:9px}
}
@media (max-width:560px){
  .chip{padding:6px 8px;gap:5px}
  .chip .k{font-size:7px;letter-spacing:.14em}
  .chip b{font-size:13px}
  .chip.best{display:none}
  .icon-btn{width:30px;height:30px;font-size:10px}
  #tools{gap:3px;padding:5px;bottom:calc(8px + env(safe-area-inset-bottom))}
  .tool{min-width:56px;height:44px;padding:4px 6px}
  .tool .ti{font-size:14px}
  .tool .tl{font-size:7.5px}
  .level-grid{grid-template-columns:repeat(6,1fr);gap:5px}
  .tag{max-width:300px}
}
@media (max-width:360px){
  .tool{min-width:50px}
  .level-grid{grid-template-columns:repeat(5,1fr)}
}