:root{font-family:ui-sans-serif,system-ui,-apple-system,"Hiragino Kaku Gothic ProN","Noto Sans JP",Meiryo,sans-serif;color:#18344b;background:#dff3ff;font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-height:100dvh;display:flex;flex-direction:column;transition:background .28s,color .28s}button,input{font:inherit}button{cursor:pointer}button:disabled{opacity:.52;cursor:not-allowed}a{color:inherit} .skip-link{position:absolute;left:-9999px;background:#fff;color:#153d65;padding:12px;z-index:100}.skip-link:focus{left:10px;top:10px}
.theme-home,.theme-defense{--surface:#fff;--main:#eaf7ff;--ink:#16324a;--muted:#47677e;--line:#b5ddf6;--primary:#1675b6;--primary-ink:#fff;--secondary:#d9f0ff;--highlight:#3fb6d5;--softshadow:#8cc5e15e;background:radial-gradient(circle at 20% 0%,#ffffff 0,#e9f8ff 35%,#d5edff 100%);color:var(--ink)}
.theme-attack{--surface:#1b2440;--main:#0d1020;--ink:#f5f4ff;--muted:#bbc6e8;--line:#455071;--primary:#a974fd;--primary-ink:#101322;--secondary:#303a59;--highlight:#ff6595;--softshadow:#05081892;background:radial-gradient(circle at 80% 0%,#293053,#0d1020 64%);color:var(--ink)}
.theme-breaking{--surface:#23334d;--main:#081626;--ink:#f6fbff;--muted:#c0dafa;--line:#576781;--primary:#ef799b;--primary-ink:#1d1520;--secondary:#34405a;--highlight:#ff7aa3;--softshadow:#0a11258a;background:#0a1a2b;color:var(--ink)}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:67px;padding:13px max(18px,calc((100vw - 1100px)/2));border-bottom:2px solid var(--line);background:color-mix(in srgb,var(--surface) 88%,transparent)}
.brand{font-weight:900;text-decoration:none;letter-spacing:.045em;font-size:18px}.brand span{font-weight:600;font-size:11px;color:var(--muted)}.fiction-tag{font-size:12px;color:var(--muted);text-align:right}
.game-shell{width:min(100% - 32px,1050px);margin:clamp(20px,4vw,42px) auto;flex:1}.panel{background:var(--surface);border:2px solid var(--line);border-radius:22px;box-shadow:0 15px 45px var(--softshadow);overflow:hidden}.panel-head{padding:19px 25px 16px;border-bottom:2px solid var(--line);display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.eyebrow{display:inline-block;font-size:12px;font-weight:900;letter-spacing:.13em;text-transform:uppercase;color:var(--primary)}.step-indicator{font-size:13px;letter-spacing:.04em;color:var(--muted);font-weight:800}.progress{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin-top:11px}.progress span{height:7px;border-radius:3px;background:var(--line)}.progress span.done{background:var(--highlight)}
.layout{display:grid;grid-template-columns:minmax(180px,35%) minmax(0,1fr);min-height:490px}.visual{padding:24px 15px;display:flex;flex-direction:column;justify-content:center;align-items:center;background:linear-gradient(145deg,color-mix(in srgb,var(--primary) 12%,var(--surface)),var(--secondary));border-right:2px solid var(--line);text-align:center}.portrait{display:block;width:min(100%,260px);height:auto;aspect-ratio:3/4;max-height:340px;object-fit:contain;filter:drop-shadow(0 12px 18px var(--softshadow));}.who{font-size:17px;font-weight:900;margin:15px 0 5px}.role{color:var(--muted);font-size:12px}.talk{font-size:14px;line-height:1.6;background:var(--surface);color:var(--ink);border:2px solid var(--line);padding:12px;border-radius:13px;margin:14px 0 0;width:100%;text-align:left}
.content{padding:clamp(22px,4vw,40px);display:flex;flex-direction:column;justify-content:center;gap:15px;min-width:0}.content h1{font-size:clamp(2.2rem,6vw,4.2rem);margin:0;line-height:1.13;letter-spacing:-.045em}.content h2{font-size:clamp(1.5rem,3vw,2.25rem);line-height:1.25;margin:0;letter-spacing:-.025em}.content h3{margin:0;font-size:17px}.content p{margin:0;line-height:1.75}.lead{color:var(--muted);font-size:clamp(15px,1.65vw,18px)}.section-text{font-size:15px}.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:47px;min-width:125px;border-radius:12px;font-size:15px;font-weight:850;padding:10px 18px;text-decoration:none;border:2px solid transparent;text-align:center;transition:transform .15s,filter .15s}.btn:hover:not(:disabled){filter:brightness(1.06);transform:translateY(-1px)}.btn:focus-visible,.answer:focus-visible,.chip:focus-visible,.link:focus-visible{outline:3px solid var(--highlight);outline-offset:3px}.btn.primary{background:var(--primary);color:var(--primary-ink)}.btn.secondary{background:var(--secondary);border-color:var(--line);color:var(--ink)}.btn.quiet{background:transparent;border-color:var(--line);color:var(--ink)}
.notice{background:var(--secondary);border-left:5px solid var(--highlight);border-radius:9px;padding:13px 15px;color:var(--ink);font-size:14px;line-height:1.7}.notice.danger{border-color:#ef779b}.feedback{font-weight:800;color:var(--ink);font-size:14px}.feedback[role="status"]{border:2px solid var(--line);padding:13px;border-radius:10px;background:var(--secondary)}.answer-list{display:grid;gap:9px}.answer{width:100%;min-height:50px;border:2px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink);font-weight:700;text-align:left;line-height:1.5;padding:11px 16px;transition:background .12s,border-color .12s}.answer[aria-pressed="true"]{border-color:var(--primary);background:var(--secondary);box-shadow:inset 4px 0 0 var(--primary)}.answer:not(:disabled):hover{border-color:var(--primary)}
.story-window{padding:15px;border-radius:12px;border:2px solid var(--line);background:var(--secondary);font-size:14px;line-height:1.7}.story-window strong{color:var(--primary)}.chat{background:var(--main);border:2px solid var(--line);border-radius:13px;padding:14px;display:grid;gap:9px}.chat-label{font-weight:900;color:var(--muted);font-size:13px}.chat input{width:100%;border-radius:9px;background:var(--surface);border:2px solid var(--line);color:var(--ink);padding:12px;font-size:15px}.chat input:focus-visible{outline:3px solid var(--highlight)}.small{color:var(--muted);font-size:13px}.rank{font-size:clamp(3rem,7vw,5rem);color:var(--primary);font-weight:1000;line-height:1}.chip-row{display:flex;gap:8px;flex-wrap:wrap}.chip{min-height:43px;border:2px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font-weight:750;padding:9px 11px}.slots{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.slot{min-height:63px;padding:12px 6px;border:2px dashed var(--line);border-radius:10px;display:grid;place-items:center;text-align:center;font-size:13px;font-weight:850;overflow-wrap:anywhere;background:var(--secondary)}.slot.filled{border-style:solid;border-color:var(--primary)}.statgrid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.stat{padding:18px;border:2px solid var(--line);border-radius:14px;background:var(--secondary);text-align:center}.stat b{font-size:clamp(2.1rem,5vw,3.6rem);display:block;color:var(--primary);line-height:1.2}.stat span{font-size:14px;color:var(--muted)}.breaking-head{background:#b61c49;color:white;font-size:clamp(19px,3vw,30px);font-weight:950;padding:20px;text-align:center}.site-foot{padding:14px 20px 23px;display:flex;gap:10px;justify-content:space-between;flex-wrap:wrap;align-items:center;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.site-foot p{margin:0}.site-foot a{font-weight:750}.sr-only{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}
@media(max-width:660px){.topbar{padding:12px 16px}.brand{font-size:15px}.brand span{font-size:10px}.fiction-tag{font-size:10px;max-width:120px}.game-shell{width:calc(100% - 20px);margin:14px auto}.panel-head{padding:14px 17px}.layout{display:flex;flex-direction:column;min-height:0}.visual{display:grid;grid-template-columns:90px 1fr;grid-template-rows:auto auto;gap:6px 12px;justify-items:start;align-items:center;text-align:left;padding:12px 16px;border-right:0;border-bottom:2px solid var(--line)}.portrait{width:90px;grid-row:span 3;max-height:126px;border-width:2px}.who{margin:0}.role{display:none}.talk{margin:0;padding:8px 10px;font-size:13px}.content{padding:20px 16px 24px;gap:14px}.content h1{font-size:2.5rem}.stat{padding:13px 5px}.slot{font-size:12px}.btn{width:100%;min-width:0}.row .btn{flex:1 1 180px}.site-foot{padding:14px 18px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
/* Accessible, opt-in BGM control; OFF until a user gesture starts audio. */
.topbar-actions{display:flex;gap:12px;align-items:center}
.sound-toggle{display:flex;gap:6px;align-items:center;justify-content:center;min-width:91px;min-height:44px;border:2px solid var(--line);border-radius:12px;padding:7px 10px;background:var(--secondary);color:var(--ink);font-size:13px;font-weight:800}
.sound-toggle svg{flex:0 0 22px;width:22px;height:22px;stroke:currentColor;stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round}
.sound-toggle .sound-wave{display:none}
.sound-toggle[aria-pressed="true"] .sound-wave{display:block}
.sound-toggle[aria-pressed="true"] .sound-cross{display:none}
.sound-toggle:focus-visible{outline:3px solid var(--highlight);outline-offset:3px}
@media(max-width:540px){.fiction-tag{display:none}.topbar-actions{gap:7px}.sound-toggle{min-width:77px;padding:6px 8px;font-size:12px}}