:root{font-family:"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;color:#243d34;background:#f4f2eb;font-synthesis:none;--green:#315c44;--muted:#778379}
*{box-sizing:border-box}body{margin:0;min-width:280px}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:disabled{cursor:default}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #c87b29;outline-offset:5px}[hidden]{display:none!important}
.game{width:min(1180px,100%);min-height:100svh;margin:auto;padding:0 34px 18px;display:flex;flex-direction:column}.topbar{height:88px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px}.home{width:fit-content;color:#6c796a;text-decoration:none;font:800 12px/1 sans-serif;letter-spacing:2px}.score{display:flex;align-items:baseline;gap:8px}.score b{font-size:32px;font-weight:800;font-variant-numeric:tabular-nums;line-height:1}.score span{font-size:11px;letter-spacing:1px;color:var(--muted)}nav{display:flex;justify-content:flex-end;gap:9px}.icon-button{border:1px solid #d7ded2;background:#ffffff70;width:36px;height:36px;border-radius:50%;font-size:18px;line-height:1;color:#69806b}.icon-button[aria-pressed="false"]{opacity:.65}.icon-button[aria-pressed="true"]{background:#315c44;color:#fff}.question{text-align:center;padding:22px 0 25px;min-height:124px}.question h1{font-size:clamp(27px,3.8vw,43px);line-height:1.3;letter-spacing:.035em;margin:0;font-weight:800}.question p{font-size:13px;line-height:1.6;margin:10px 0 0;color:var(--muted)}body[data-phase="correct"] .question h1{color:#388254}body[data-phase="over"] .question h1{color:#967048}
.arena{isolation:isolate;position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:22px;height:clamp(365px,61svh,650px);min-height:365px}.animal-card{position:relative;display:flex;flex-direction:column;justify-content:flex-end;padding:25px 28px 20px;overflow:hidden;border:1px solid #dde1d3;border-radius:32px;background:transparent;color:inherit;transition:border-color .16s,box-shadow .16s;touch-action:manipulation}.animal-card::before{content:"";position:absolute;inset:0;z-index:-2;background:radial-gradient(ellipse at 45% 26%,#fefff8 0,#e9eddf 68%,#e1e7d6 100%)}.animal-card.right::before{background:radial-gradient(ellipse at 45% 26%,#fffef9 0,#eeeadf 68%,#e9e2d5 100%)}.animal-card.correct{border-color:#5a9b60;box-shadow:inset 0 0 0 2px #5a9b60}.animal-card.incorrect{border-color:#b88565;box-shadow:inset 0 0 0 2px #b88565}#canvas-host{position:absolute;inset:0;z-index:-1;pointer-events:none}#canvas-host canvas{display:block;width:100%;height:100%}.animal-label{display:flex;flex-direction:column;gap:8px;position:relative;min-height:71px;text-align:center;justify-content:flex-end;pointer-events:none}.animal-label strong{font-size:clamp(16px,2.1vw,25px);line-height:1.4;letter-spacing:.025em}.measure{font-size:12px;line-height:1.6;color:#798471;min-height:20px}.measure.revealed{color:#426b46;font-weight:700;font-size:14px}.choose-label{display:flex;position:relative;align-items:center;justify-content:center;gap:12px;margin:17px auto 0;background:#fffdf7cc;border:1px solid #d4dcca;border-radius:50px;min-height:44px;width:min(100%,200px);font-size:14px;font-weight:700;color:#4a6650}.choose-label kbd{font:12px sans-serif;color:#91a18d}.correct .choose-label{background:#4e8054;border-color:#4e8054;color:#fff}.incorrect .choose-label{background:#947259;border-color:#947259;color:#fff}.answer-mark{position:absolute;top:20px;right:22px;width:30px;height:30px;border-radius:50%;display:none;align-items:center;justify-content:center;font-size:17px;font-weight:bold;background:#4e8054;color:white}.correct .answer-mark{display:flex}.correct .answer-mark::after{content:"✓"}
.bottom-bar{min-height:93px;display:flex;align-items:center;justify-content:center;text-align:center;padding-top:10px}#prompt{font-size:10px;line-height:1.6;color:#8b9488;margin:0}#feedback{display:flex;align-items:center;justify-content:center;gap:22px}#run-result{font-size:12px;color:#77816e;line-height:1.6}.primary{border:0;border-radius:40px;background:var(--green);color:#fff;padding:13px 28px;min-height:46px;font-size:14px;font-weight:700}.primary:disabled{opacity:.5}.error{text-align:center;background:#f2dfd1;color:#754124;border-radius:12px;padding:20px;font-size:13px}
dialog{border:1px solid #dbe0d0;border-radius:24px;background:#fafaf3;color:#314433;width:min(510px,calc(100% - 28px));max-height:85dvh;padding:35px;box-shadow:0 18px 100px #233b3430}dialog::backdrop{background:#23372e66;backdrop-filter:blur(4px)}dialog h2{font-size:21px;margin:7px 0 22px}dialog p{font-size:13px;line-height:1.9;color:#647460}dialog .primary{margin-top:22px}.close{position:absolute;right:14px;top:10px;background:none;border:0;font-size:27px;color:#71846f;width:34px;height:34px}details{border-top:1px solid #dce2d4;padding-top:15px;margin-top:22px}summary{cursor:pointer;font-size:12px;color:#647460}#source-list article{padding:12px 0;border-bottom:1px solid #e2e6db}#source-list h3{font-size:13px;margin:0}#source-list p,#source-list a{font-size:11px;margin:5px 0;line-height:1.8}#source-list a{color:#466b4b}
@media(hover:hover){.animal-card:not(:disabled):hover{border-color:#9cad90;box-shadow:0 10px 24px #5267460a}.animal-card:not(:disabled):hover .choose-label{background:#faffef}}
@media(max-width:650px){.game{padding:0 14px max(12px,env(safe-area-inset-bottom))}.topbar{height:70px;gap:7px}.home{font-size:10px;letter-spacing:1px}.score b{font-size:27px}.score span{font-size:9px;letter-spacing:0}.score{gap:5px}.icon-button{width:32px;height:32px;font-size:17px}nav{gap:6px}.question{min-height:111px;padding:15px 0 23px}.question h1{font-size:28px}.question p{font-size:11px;margin-top:9px}.arena{gap:9px;height:clamp(360px,57svh,530px);min-height:360px}.animal-card{padding:16px 10px 15px;border-radius:24px}.animal-label{min-height:83px;gap:7px}.animal-label strong{font-size:15px;min-height:42px;display:flex;align-items:flex-end;justify-content:center;overflow-wrap:anywhere}.measure{font-size:9px;min-height:29px;line-height:1.5;display:flex;align-items:center;justify-content:center}.measure.revealed{font-size:10px}.choose-label{font-size:12px;min-height:39px;margin-top:12px}.choose-label kbd{display:none}.answer-mark{top:14px;right:14px;width:26px;height:26px;font-size:15px}.bottom-bar{min-height:87px;padding-top:6px}#feedback{gap:14px}#run-result{font-size:10px}.primary{font-size:12px;padding:12px 23px}#prompt{font-size:9px}dialog{padding:30px 23px}dialog h2{font-size:19px}dialog p{font-size:12px}}
@media(max-width:350px){.game{padding-right:9px;padding-left:9px}.score{gap:3px}.score span{font-size:8px}.animal-card{padding-right:7px;padding-left:7px}.animal-label strong{font-size:13px}.question h1{font-size:26px}}
@media(max-height:550px) and (min-width:651px){.topbar{height:55px}.question{min-height:75px;padding:0 0 14px}.question h1{font-size:27px}.question p{margin-top:4px;font-size:11px}.arena{height:320px;min-height:320px}.animal-card{padding-bottom:14px}.animal-label{min-height:48px;gap:3px}.animal-label strong{font-size:18px}.choose-label{margin-top:8px;min-height:34px}.bottom-bar{min-height:66px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}