:root{color-scheme:dark;--bg:#0b141d;--panel:#111f2c;--line:#293c49;--muted:#9dafb9;--text:#eef4f6;--gold:#edc66e;--green:#85c9a5}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.65 system-ui,-apple-system,"Noto Sans JP",sans-serif}.top,main,footer{max-width:1240px;margin:auto;padding:0 28px}.top{height:92px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}a{color:inherit}.brand{display:flex;align-items:center;gap:14px;text-decoration:none;font-size:20px;font-weight:700;letter-spacing:.08em}.mark{display:grid;place-items:center;width:44px;height:44px;border:1px solid var(--gold);border-radius:8px;color:var(--gold);font-size:17px}.sub{display:block;font-size:9px;font-weight:500;color:var(--muted);letter-spacing:.17em}.badge{color:var(--muted);font-size:12px;display:flex;align-items:center;gap:10px}.light{width:6px;height:6px;background:var(--green);border-radius:50%}.intro{display:flex;align-items:center;justify-content:space-between;gap:32px;padding:35px 0 29px}.eyebrow{color:var(--gold);font-size:11px;letter-spacing:.17em;margin:0 0 8px}h1{font-size:clamp(23px,3vw,32px);line-height:1.4;letter-spacing:.03em;margin:0 0 6px}.intro p:last-child{margin:0;color:var(--muted);font-size:13px}.route{display:flex;align-items:center;gap:12px;font-size:12px;white-space:nowrap}.route span{position:relative;padding-top:18px}.route span:before{content:"";position:absolute;top:0;left:calc(50% - 3px);width:6px;height:6px;border-radius:50%;background:var(--green)}.route i{width:24px;height:1px;background:var(--line);align-self:flex-start;margin-top:3px}.route small{position:absolute;top:37px;left:0;font-size:9px;color:var(--muted)}.play-panel{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#080f16;box-shadow:0 15px 45px #0003}.player-bar{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:9px 15px;background:var(--panel);font-size:11px;color:var(--muted)}button{font:inherit;cursor:pointer;border:1px solid var(--line);border-radius:6px;padding:10px 12px;background:#182935;color:var(--text);transition:background .15s}button:hover{background:#29404e}button:focus-visible,summary:focus-visible{outline:2px solid var(--gold);outline-offset:3px}button:disabled{cursor:wait;opacity:.45}.quiet{border:0;background:transparent;padding:3px 6px;font-size:11px}.viewport{aspect-ratio:16/9;position:relative;background:#080f16}.viewport iframe{position:absolute;border:0;width:100%;height:100%;inset:0}.controls{display:grid;grid-template-columns:repeat(8,1fr);gap:7px;padding:12px;background:var(--panel)}.controls button{font-size:12px;padding:11px 5px;touch-action:manipulation;user-select:none}.controls .accent{background:var(--gold);color:#17212a;border-color:var(--gold);font-weight:700}.controls .emergency{background:#4b242d;border-color:#75404c;color:#ffced3}kbd{display:inline-block;color:var(--muted);font:10px/1.5 ui-monospace,monospace;border:1px solid var(--line);border-radius:3px;padding:0 4px;margin-left:3px}.accent kbd{color:#38444c;border-color:#ae9558}.hints{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);padding:13px 3px}.hints b{color:var(--gold);font-weight:500;margin-right:8px}.guide{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:29px}.guide h2{font-size:14px;margin:0 0 9px;font-weight:600}.guide h2 span{font-size:10px;color:var(--gold);margin-right:10px}.guide p{color:var(--muted);font-size:12px;margin:0;line-height:1.9}details{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:28px;padding:16px 0;font-size:12px;color:var(--muted)}summary{cursor:pointer;color:var(--text)}.details-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:10px}.notice{color:#81949f;font-size:11px;margin:20px 0 35px}footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;padding-top:20px;padding-bottom:24px;color:#81949f;font-size:10px}footer a{text-decoration:none}.play-panel:fullscreen{border:0;border-radius:0;display:flex;flex-direction:column;justify-content:center}.play-panel:fullscreen .viewport{max-height:calc(100vh - 120px);flex:1}.play-panel:fullscreen .controls{flex-shrink:0}@media(max-width:900px){.intro{display:block}.route{margin-top:22px;padding-bottom:12px}.controls{grid-template-columns:repeat(4,1fr)}.controls kbd{display:none}}@media(max-width:600px){.top,main,footer{padding-left:14px;padding-right:14px}.top{height:75px}.brand{font-size:17px}.badge{font-size:10px}.intro{padding-top:25px}.player-bar{font-size:10px;padding:7px 9px;gap:4px}.player-bar .quiet{font-size:10px;padding:3px}.controls{gap:5px;padding:8px}.controls button{font-size:11px;padding:12px 3px}.guide,.details-grid{grid-template-columns:1fr;gap:22px}.guide{margin-top:20px}.hints{font-size:10px;gap:10px}.hints>span:last-child{white-space:nowrap}.route{gap:9px;font-size:11px}.route i{width:20px}footer{flex-direction:column;gap:5px}}