:root{color-scheme:light;--ink:#103d70;--blue:#008cf4;--mint:#ddf4e8;--cream:#fffaf0;--line:#c8e1ef}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 10% 10%,#eaf9ff,transparent 50%),var(--cream);color:var(--ink);font-family:"BIZ UDPGothic","Meiryo",sans-serif;line-height:1.65}main{max-width:1080px;margin:auto;padding:24px 24px 34px}button,a,input{touch-action:manipulation}button{font:inherit;font-weight:700;color:var(--ink);background:#fff;border:1px solid #abd5ef;border-radius:24px;min-height:46px;padding:9px 17px;cursor:pointer}button:hover:not(:disabled){background:#ebf7ff}button:disabled{opacity:.5;cursor:default}a{color:#065eaa}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #a86100;outline-offset:3px}.primary{background:linear-gradient(#00a3ff,#0070e8);color:white;box-shadow:inset 0 2px 2px #84ddff;border-color:#36b4ff}.primary:hover:not(:disabled){background:#007bdd}.subject{background:#fff0c9;color:#7e4c00;border-radius:18px;padding:6px 14px;font-weight:700;font-size:14px}.hero{position:relative;padding:32px 40px;border:1px solid var(--line);border-radius:30px;background:linear-gradient(120deg,#fff 45%,#e4f7ef);box-shadow:0 10px 25px #194e7310;overflow:hidden}.hero{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,.85fr);gap:20px;align-items:center}.hero-copy{min-width:0;position:relative;z-index:1}.hero-art{width:100%;max-width:370px;justify-self:center;pointer-events:none}.hero-art svg{display:block;width:100%;height:auto}.eyebrow{font-weight:700;color:#487392}h1{font-size:clamp(32px,5.5vw,58px);line-height:1.6;margin:12px 0;font-weight:900;letter-spacing:.035em}rt{font-size:.35em;letter-spacing:.08em}h2{font-size:23px;line-height:1.5;margin:12px 0 16px}.start-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 12px}.start-actions button{min-width:230px}.small,.operation-note{font-size:13px;color:#496d88}.play-top{display:flex;align-items:center;gap:12px}.play-top strong{margin-left:auto;white-space:nowrap}.play-top button{padding:8px 16px}progress{width:100%;height:6px;border:0;accent-color:#049be0;margin:14px 0 0}.play-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:24px;align-items:start}.globe-panel,.question-panel{min-width:0}.globe-frame{height:390px;position:relative;border-radius:28px;overflow:hidden;background:radial-gradient(ellipse at center,#fff 25%,#e2f2f5 100%);border:1px solid #c3e1e7}#globe{width:100%;height:100%}#globe canvas{display:block;width:100%;height:100%;filter:drop-shadow(0 5px 7px #19546b24)}.north{position:absolute;left:14px;top:10px;pointer-events:none;font-weight:700;font-size:13px}.map-key{position:absolute;right:10px;bottom:10px;pointer-events:none;background:#ffffffed;border:1px solid #dabd52;border-radius:14px;padding:2px 8px;font-size:12px;color:#695312}.controls{display:grid;grid-template-columns:repeat(6,1fr);gap:7px;margin-top:10px}.controls button{padding:4px;min-width:0;font-size:20px}.reset-view{display:block;width:100%;margin-top:8px;background:#edf7f8}.operation-note{font-size:11px;text-align:center;margin:7px 0 0;line-height:1.5}.question-panel{border-radius:26px;background:#fff;border:1px solid var(--line);padding:20px;box-shadow:0 7px 18px #16477208}.choices{display:grid;grid-template-columns:1fr 1fr;gap:12px}.choice{border-radius:18px;min-height:80px;word-break:normal;overflow-wrap:anywhere;padding:12px 9px;font-size:18px;position:relative}.choice.wrong{background:#f5f0e7;border-color:#d7b66d}.choice.correct{background:#d9f3e6;border:2px solid #008978}.feedback{padding:16px;border-radius:18px;background:#e5f5ec;margin:14px 0}.feedback h3{font-size:24px;margin:0 0 8px}.feedback p{margin:8px 0;line-height:1.7}.feedback img{width:72px;height:48px;object-fit:contain;float:right;margin:2px 0 10px 12px}.try-again{background:#fff6dc;border-radius:16px;padding:12px;margin:12px 0}.hint{background:#ecf7fd;border-left:4px solid #219ccc;border-radius:12px;padding:12px}.helper-buttons{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}.helper-buttons button{flex:1;font-size:14px;white-space:nowrap}#next{width:100%;margin-top:14px;min-height:52px}.result-card{padding:28px;border:1px solid var(--line);border-radius:28px;background:#fff}.result-score{font-size:40px;font-weight:900;margin:12px 0}.result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:20px 0}.country-result{background:#f2faff;border:1px solid var(--line);border-radius:20px;padding:12px 16px}.country-result small{display:block;color:#486681}.result-actions{display:flex;gap:12px;flex-wrap:wrap}.notice{padding:20px;background:#fff1d7;border:1px solid #dcc08b;border-radius:22px;margin:18px 0}.save-line{margin:20px 0 12px;font-size:12px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}#retry-save{font-size:12px}footer{font-size:12px;color:#526a81}footer details{margin:18px 0}footer summary{cursor:pointer;min-height:40px;font-weight:700}footer label{display:inline-flex;align-items:center;gap:8px;min-height:44px}footer input{width:20px;height:20px}footer>a{margin-right:18px}#resume-slot button,#last-result button{margin:10px 0}.loading{opacity:.7}[hidden]{display:none!important}
@media(max-width:650px){main{padding:16px 12px 24px}.hero{padding:24px 20px}.hero{grid-template-columns:1fr;gap:12px}.hero-art{max-width:220px}.hero h1{font-size:clamp(30px,7.8vw,48px)}.hero p:not(.small){font-size:15px}.start-actions{display:grid}.start-actions button{width:100%;min-width:0}.play-grid{grid-template-columns:1fr;gap:14px}.play-top{font-size:12px;gap:8px}.play-top button{min-height:44px;font-size:13px;padding:6px 12px}h2{font-size:19px;margin:10px 0}.globe-frame{height:clamp(210px,31vh,290px);border-radius:22px}.controls{gap:6px;margin-top:8px}.controls button{min-height:44px}.reset-view{min-height:44px;font-size:13px}.operation-note{display:none}.question-panel{padding:12px;border-radius:22px}.choices{gap:8px}.choice{font-size:16px;min-height:62px;padding:8px}.helper-buttons{margin-top:10px}.feedback{padding:12px;margin:8px 0}.feedback h3{font-size:22px}.feedback p{font-size:15px}.result-card{padding:20px 16px}.result-grid{grid-template-columns:1fr}.result-actions{display:grid}.result-actions button{width:100%}.map-key{font-size:11px}footer{font-size:12px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

@media(min-width:651px) and (max-width:1000px){.hero{padding:28px;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr)}.hero h1{font-size:clamp(32px,4.4vw,44px)}.hero .start-actions{display:grid}.hero .start-actions button{min-width:0;width:100%}}

/* Keep the next action in reach while leaving explanations and observations scrollable. */
@media(max-width:700px),(max-height:500px) and (max-width:1000px){
  #play:has(#next:not([hidden])){padding-bottom:calc(84px + env(safe-area-inset-bottom,0px))}
  #play :is(#next:not([hidden])){position:fixed;z-index:20;left:max(12px,env(safe-area-inset-left,0px));right:max(12px,env(safe-area-inset-right,0px));bottom:calc(10px + env(safe-area-inset-bottom,0px));width:auto;margin:0;min-height:52px;box-shadow:0 0 0 6px #fffdf7,0 -4px 18px #073e7d24}
}