:root{color-scheme:dark;--green:#5cdb91;--ink:#090d0a;--panel:#131b16;--muted:#aebdb2;--line:#304237}*{box-sizing:border-box}body{margin:0;background:var(--ink);color:#eff5f0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.6}a{color:inherit;text-underline-offset:4px}a:hover{color:var(--green)}button,select,input,textarea{font:inherit}button,select{min-height:44px;border:1px solid #4b6252;background:#202e25;color:#eff5f0;border-radius:8px;padding:9px 18px;cursor:pointer}button:hover{background:#304438}button:active{transform:translateY(1px)}button:disabled{opacity:.5;cursor:default}button.primary,button[aria-pressed=true]{background:var(--green);border-color:var(--green);color:#0b2213;font-weight:750}button.primary:hover{background:#8be8b2}:focus-visible{outline:3px solid #dce8b1;outline-offset:4px}[hidden]{display:none!important}.site-header{border-bottom:1px solid var(--line)}.nav,main,.footer-inner{width:min(1060px,calc(100% - 40px));margin:auto}.nav{min-height:70px;display:flex;justify-content:space-between;align-items:center;gap:24px}.brand{font-weight:850;text-decoration:none;letter-spacing:.05em}.nav-links{display:flex;gap:24px}.nav-links a{font-size:.9rem;text-decoration:none;color:var(--muted)}main{padding:26px 0 64px}.breadcrumb{font-size:.8rem;color:var(--muted)}h1{font-size:clamp(2rem,5vw,3.4rem);line-height:1.08;letter-spacing:-.045em;margin:18px 0 12px}.hero p{margin:0;color:#bdcbc1;max-width:66ch}.hero{margin-bottom:25px}.toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}.mode-tabs{display:flex;gap:8px}.units{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--muted)}.units select{padding:7px 10px}#game{min-height:580px;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px 28px}.game-meta{display:flex;justify-content:space-between;gap:16px;font-size:.8rem;color:var(--muted)}.game-meta b{color:#e8f2eb;margin-left:18px}.rounds{display:flex;gap:6px;margin:14px 0}.rounds span{font-size:.72rem;text-align:center;min-width:32px;border-bottom:3px solid #394c3e;padding:1px 6px 4px;color:#aebdb2}.rounds .done{border-color:var(--green);color:var(--green)}.rounds .current{border-color:#f0f6e7;color:#f0f6e7}.round-heading{font-size:clamp(1.1rem,2.4vw,1.5rem);margin:12px 0 16px;line-height:1.35}.object-labels{display:grid;grid-template-columns:1fr 1fr;gap:24px}.object-labels>div{display:flex;flex-direction:column;min-width:0}.object-labels>div:last-child{border-left:1px solid var(--line);padding-left:24px}.object-labels strong{font-size:.95rem}.object-labels span:not(.eyebrow){font-size:.76rem;color:var(--muted)}.eyebrow{font-size:.68rem;font-weight:750;letter-spacing:.12em;text-transform:uppercase;color:var(--green)}.scene-wrap{position:relative;margin:18px 0 10px;border-radius:10px;background:#0c120f;border:1px solid #263b2d}#scene{display:block;width:100%;height:220px;overflow:visible}#asset-status{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:12px;padding:20px;text-align:center;background:#101a13ed;border-radius:10px;flex-wrap:wrap}.controls{display:grid;grid-template-columns:1fr auto;align-items:center;gap:4px 12px}.controls label{font-size:.85rem;font-weight:650}.controls output{font-variant-numeric:tabular-nums;font-size:.8rem;color:#c4d2c8}.controls input{grid-column:1/-1;width:100%;height:40px;accent-color:var(--green);margin:0;cursor:ew-resize}.range-limits{grid-column:1/-1;display:flex;justify-content:space-between;font-size:.68rem;color:var(--muted);margin-top:-7px}.actions{display:flex;flex-wrap:wrap;gap:10px;grid-column:1/-1;margin-top:16px}.controls .primary{margin-left:auto;min-width:160px}.hint{color:var(--muted);font-size:.75rem;text-align:center;margin:14px 0 0}.reveal{display:grid;grid-template-columns:100px 1fr;gap:20px;border-top:1px solid var(--line);padding-top:20px;margin-top:22px}.reveal h3{font-size:1rem;margin:0}.reveal p{font-size:.85rem;margin:6px 0;color:#c2cec5}.score{font-size:3rem;color:var(--green);font-weight:800;line-height:1.3}.score small{font-size:.8rem;color:var(--muted)}.sources a{font-size:.75rem}.next-action{text-align:right;margin-top:16px}.results{max-width:760px;margin:24px auto}.results>h2{font-size:clamp(4rem,10vw,6.5rem);line-height:1.1;letter-spacing:-.06em;margin:6px 0;color:var(--green)}.results h2 small{font-size:.28em;color:var(--muted);letter-spacing:0}.results>p{color:var(--muted)}.result-list{list-style:none;padding:0;margin:24px 0}.result-list li{display:flex;gap:16px;justify-content:space-between;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}.result-list strong{font-size:.9rem;font-weight:600}.result-list span{display:block;font-size:.76rem;color:var(--muted)}.result-list b{white-space:nowrap;color:var(--green);font-size:1.2rem}.result-list small{color:var(--muted);font-size:.7rem}.replay-actions{padding-top:20px;border-top:1px solid var(--line)}textarea{width:100%;background:#0c120f;color:#e8f2e9;padding:14px;border:1px solid var(--line);border-radius:8px}.notice{background:#1e2e22;border:1px solid #56725b;border-radius:8px;padding:12px 16px;margin:12px 0;font-size:.85rem}.notice button{margin-left:10px}.invalid{padding:60px 0;max-width:650px}.article{display:grid;grid-template-columns:1fr 1fr;gap:48px;padding-top:48px}.article h2,.faq h2{font-size:1.65rem;letter-spacing:-.025em;margin:0 0 18px}.article p,.article li,.faq p{color:#bac8be;font-size:.94rem}.article ol{padding-left:22px}.article li{margin:12px 0;padding-left:6px}.article strong{color:#e5eee8}.faq{margin-top:44px;padding-top:28px;border-top:1px solid var(--line)}details{padding:16px 0;border-bottom:1px solid #25372a}summary{cursor:pointer;font-weight:650;min-height:32px}.faq details p{max-width:75ch}.related{margin-top:40px;display:flex;gap:16px;flex-wrap:wrap}.related a{padding:12px 18px;border:1px solid var(--line);border-radius:8px}.footer-inner{border-top:1px solid var(--line);padding:24px 0 32px;display:flex;justify-content:space-between;gap:20px;font-size:.8rem;color:var(--muted)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}@media(max-width:600px){.nav,main,.footer-inner{width:calc(100% - 28px)}.nav{min-height:60px}.nav-links{gap:14px}.nav-links a:first-child{display:none}main{padding-top:18px}.hero{margin-bottom:18px}.hero p{font-size:.88rem}.toolbar{flex-wrap:wrap}.units>span:first-child{display:none}button{padding:9px 12px}#game{padding:16px 14px;min-height:570px}.game-meta{font-size:.7rem;gap:8px}.game-meta b{margin-left:5px}.game-meta>span:last-child{text-align:right}.object-labels{gap:12px}.object-labels>div:last-child{padding-left:12px}.object-labels strong{font-size:.83rem}.object-labels span:not(.eyebrow){font-size:.7rem}#scene{height:170px}.controls{grid-template-columns:1fr}.controls output{font-size:.75rem}.controls .actions{display:grid;grid-template-columns:1fr 1fr}.controls .primary{grid-column:1/-1;width:100%;margin-left:0}.reveal{grid-template-columns:1fr;gap:8px}.score{font-size:2.3rem}.reveal h3{display:none}.article{grid-template-columns:1fr;gap:24px;padding-top:32px}.result-list strong{font-size:.8rem}.result-list span{font-size:.7rem}.result-list b{font-size:1rem}.footer-inner{flex-wrap:wrap}.notice button{margin:10px 0 0}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
/* A native select retains its keyboard/menu behavior; the indicator has its own
   reserved space so platform arrows cannot sit on the border. */
.select-wrap{position:relative;display:inline-flex}
.select-wrap::after{content:"";position:absolute;right:16px;top:50%;width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:translateY(-70%) rotate(45deg);pointer-events:none;color:#d7e6dc}
.units select{appearance:none;-webkit-appearance:none;padding:9px 40px 9px 14px;min-width:118px}
.article section{min-width:0;scroll-margin-top:20px}
.article a{color:var(--green);overflow-wrap:anywhere}
#other-tab{position:relative}
@media(max-width:600px){
  main{padding-top:12px}
  .hero{margin-bottom:12px}
  h1{margin:12px 0 8px}
  .hero p{line-height:1.4}
  .toolbar{margin-bottom:10px}
  .units select{min-width:112px}
  #game{padding:12px 14px;min-height:600px}
  .rounds{margin:8px 0;gap:5px}
  .round-heading{margin:8px 0 10px}
  .object-labels strong{line-height:1.35}
  .object-labels span:not(.eyebrow){line-height:1.4}
  .scene-wrap{margin:12px 0 8px}
  #scene{height:160px}
  .controls{gap:3px 8px}
  .controls .actions{grid-template-columns:1fr 1fr 1fr;gap:6px;margin-top:10px}
  .controls .actions button{padding:8px 6px;min-height:44px;font-size:.85rem}
  .controls .primary{grid-column:auto;min-width:0}
  .hint{margin-top:10px;line-height:1.4}
}
@media(forced-colors:active){.select-wrap::after{color:ButtonText}}