:root{
  --ink:#3a2d3f;
  --cream:#fffcf5;
  --coral:#ff8c78;
  --coral-soft:#ffb4a6;
  --red:#e63c3c;
  --yellow:#ffc828;
  --yellow-outline:#dc9c14;
  --mint:#6fe08b;
  --card:#fff;
  --safeT:env(safe-area-inset-top,0px);
  --safeB:env(safe-area-inset-bottom,0px);
  --safeL:env(safe-area-inset-left,0px);
  --safeR:env(safe-area-inset-right,0px);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0;position:fixed;inset:0;overflow:hidden;overscroll-behavior:none;
  -webkit-user-select:none;user-select:none;-webkit-touch-callout:none;
  font-family:"PingFang HK","Noto Sans TC","Varela Round","Nunito",system-ui,sans-serif;
  color:var(--ink);background:var(--cream)}
button{font:inherit;color:inherit;border:0;cursor:pointer;touch-action:manipulation}
.hidden{display:none!important}

#bg{position:fixed;inset:0;pointer-events:none;overflow:hidden;background:linear-gradient(165deg,#fffcf5 0%,#fff0ea 40%,#eef6ff 100%)}
#bg i{position:absolute;border-radius:50%;opacity:.5;animation:float 16s ease-in-out infinite alternate}
#bg i:nth-child(1){width:40vmin;height:40vmin;left:-10vmin;top:6%;background:#ffd5cc}
#bg i:nth-child(2){width:28vmin;height:28vmin;right:-8vmin;top:28%;background:#cfe8ff;animation-delay:-4s}
#bg i:nth-child(3){width:20vmin;height:20vmin;left:28%;bottom:-6vmin;background:#ffe9a8;animation-delay:-7s}
#bg i:nth-child(4){width:12vmin;height:12vmin;right:18%;bottom:18%;background:#d8f5c8;animation-delay:-2s}
@keyframes float{from{transform:translate(0,0)}to{transform:translate(3vmin,-4vmin)}}

.screen{position:fixed;inset:0;display:flex;flex-direction:column;
  padding:calc(var(--safeT) + 10px) calc(var(--safeR) + 14px) calc(var(--safeB) + 12px) calc(var(--safeL) + 14px)}

.hero{text-align:center;padding:12px 8px 8px}
.eyebrow{margin:0;font-size:13px;font-weight:700;letter-spacing:.08em;opacity:.55}
.hero h1{margin:6px 0 4px;font-size:clamp(28px,8vmin,40px);font-weight:900}
.sub{margin:0;font-size:clamp(14px,3.6vmin,17px);opacity:.7;font-weight:600}

.catGrid{flex:1;display:grid;grid-template-columns:1fr 1fr;gap:12px;align-content:center;max-width:420px;width:100%;margin:0 auto;padding:8px 0}
.catCard{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  min-height:120px;padding:16px 10px;border-radius:24px;background:var(--card);
  box-shadow:0 6px 0 rgba(58,45,63,.08);border:3px solid #ffe0d6}
.catCard:nth-child(2){border-color:#cfe8ff}
.catCard:nth-child(3){border-color:#fff0a8}
.catCard:nth-child(4){border-color:#d8f5c8}
.catCard:active{transform:translateY(3px);box-shadow:0 3px 0 rgba(58,45,63,.08)}
.catEmoji{font-size:clamp(28px,8vmin,36px);line-height:1}
.catName{font-size:clamp(18px,4.5vmin,22px);font-weight:900}
.catCount{font-size:12px;font-weight:700;opacity:.55}
.hintFooter{text-align:center;font-size:13px;font-weight:700;opacity:.5;padding:8px 0 4px}

.topBar{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:48px}
.topBar h2{margin:0;font-size:clamp(16px,4.2vmin,20px);font-weight:900;text-align:center;line-height:1.2}
.titleStack{flex:1;min-width:0;text-align:center}
.titleStack h2{font-size:clamp(15px,3.8vmin,19px)}
.progressLabel{margin:2px 0 0;font-size:12px;font-weight:700;opacity:.55}
.pill{background:#fff;border-radius:999px;padding:.4em .9em;font-size:clamp(13px,2.8vmin,16px);font-weight:800;
  box-shadow:0 3px 0 rgba(58,45,63,.1);min-height:44px;min-width:44px}
.pill.soft{background:#fff0f0;color:#c45a5a}
.pill.ghost{background:rgba(255,255,255,.55);box-shadow:none;opacity:.7}
.pill:active{transform:translateY(2px);box-shadow:0 1px 0 rgba(58,45,63,.1)}

.modeList{flex:1;display:flex;flex-direction:column;gap:14px;justify-content:center;max-width:400px;width:100%;margin:0 auto;padding:16px 0}
.modeCard{display:flex;flex-direction:column;align-items:flex-start;gap:4px;padding:20px 22px;border-radius:22px;
  background:#fff;border:3px solid #ffe0d6;box-shadow:0 5px 0 rgba(58,45,63,.08);text-align:left;min-height:72px}
.modeCard:active{transform:translateY(3px);box-shadow:0 2px 0 rgba(58,45,63,.08)}
.modeCard .modeName{font-size:clamp(18px,4.5vmin,22px);font-weight:900}
.modeCard .modeDesc{font-size:13px;font-weight:600;opacity:.55}

.playTop .progressLabel{flex:1;text-align:center;margin:0;font-size:clamp(14px,3.5vmin,17px);font-weight:800;opacity:.65}

.prompt{flex:0 0 auto;text-align:center;font-size:clamp(13px,3.2vmin,16px);font-weight:800;
  background:rgba(255,255,255,.75);margin:4px auto 6px;padding:.3em .85em;border-radius:999px;max-width:92%}

/* Stage: label beside canvas (left on wide; stacked compact on narrow) */
.playStage{flex:1 1 auto;min-height:0;display:flex;flex-direction:row;align-items:stretch;gap:8px}

.shapeLabel{flex:0 0 auto;display:flex;align-items:center;justify-content:center;
  max-width:28%;min-width:72px;padding:6px 4px}
.shapeLabel h2{margin:0;font-size:clamp(15px,3.8vmin,22px);font-weight:900;line-height:1.25;
  text-align:center;writing-mode:horizontal-tb;word-break:keep-all;
  background:rgba(255,255,255,.85);border:3px solid #ffe0d6;border-radius:18px;
  padding:.55em .65em;box-shadow:0 4px 0 rgba(58,45,63,.07)}

.canvasWrap{flex:1 1 auto;position:relative;min-height:0;min-width:0;display:flex;align-items:center;justify-content:center;
  border-radius:24px;background:rgba(255,255,255,.55);box-shadow:inset 0 0 0 3px rgba(255,140,120,.15);overflow:hidden;
  touch-action:none}
#traceCanvas{display:block;width:100%;height:100%;max-width:100%;max-height:100%;touch-action:none;cursor:crosshair}

/* Narrow phones: label above canvas as short bar (still next to figure, not in top nav) */
@media (max-width:420px){
  .playStage{flex-direction:column;gap:6px}
  .shapeLabel{max-width:none;width:100%;min-width:0;padding:0;flex:0 0 auto}
  .shapeLabel h2{font-size:clamp(14px,4vmin,18px);padding:.4em .75em;width:100%;
    border-radius:14px}
}
/* Wider / landscape: keep label left, allow vertical text feel via larger side rail */
@media (min-width:700px){
  .shapeLabel{max-width:180px;min-width:110px}
  .shapeLabel h2{font-size:clamp(18px,2.4vw,26px);padding:.7em .8em}
}
@media (orientation:landscape) and (max-height:480px){
  .prompt{display:none} /* save vertical space; label + canvas remain */
  .shapeLabel{max-width:120px;min-width:80px}
  .shapeLabel h2{font-size:14px;padding:.4em .5em}
}

.successOverlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:rgba(255,252,245,.55);pointer-events:none;animation:fadeIn .35s ease}
.successCard{background:#fff;border-radius:28px;padding:22px 28px;box-shadow:0 10px 30px rgba(58,45,63,.12);
  text-align:center;border:3px solid var(--mint)}
.successCheck{display:inline-grid;place-items:center;width:56px;height:56px;border-radius:50%;
  background:var(--mint);color:#fff;font-size:32px;font-weight:900;margin-bottom:8px}
.successCard p{margin:0;font-size:22px;font-weight:900}
@keyframes fadeIn{from{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}

.playActions{flex:0 0 auto;display:flex;gap:10px;padding-top:10px}
.btn{flex:1;min-height:52px;border-radius:18px;font-size:clamp(16px,4vmin,19px);font-weight:900;
  box-shadow:0 4px 0 rgba(58,45,63,.12)}
.btn:active{transform:translateY(3px);box-shadow:0 1px 0 rgba(58,45,63,.12)}
.btn:disabled{opacity:.4;pointer-events:none}
.btn.primary{background:var(--coral);color:#fff}
.btn.secondary{background:#fff;border:3px solid #ffe0d6}