:root{--bg:#eef0f6;--card:#fff;--fg:#1d2030;--mut:#6b7185;--l:#dfe2ec;--ac:#5b6cff;--ac2:#8a5cff;--c1:#cdd2e4;--c2:#b6bcd2;--o:#f3f4fa;--bad:#ef4b5f}
@media(prefers-color-scheme:dark){:root{--bg:#12131a;--card:#1c1e29;--fg:#eceef7;--mut:#9aa0b8;--l:#2c2f3e;--c1:#4d526c;--c2:#3b4056;--o:#171923}}
*{box-sizing:border-box}[hidden]{display:none!important}
body{margin:0;font:15px/1.5 system-ui,-apple-system,"Hiragino Sans","Noto Sans JP",sans-serif;background:var(--bg);color:var(--fg)}
#app{max-width:640px;margin:auto;padding:18px 14px 48px}
h1{margin:4px 0 0;font-size:28px;letter-spacing:-.5px}
h1 span{background:linear-gradient(90deg,var(--ac),var(--ac2));-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{margin:0 0 16px;color:var(--mut);font-size:13px}
.mut{color:var(--mut);font-size:13px;margin:6px 0 0}
.warn{color:var(--bad);font-size:13px;font-weight:600;margin:6px 0 10px}
.card{background:var(--card);border-radius:16px;padding:14px;margin-bottom:12px;box-shadow:0 1px 3px rgba(20,24,50,.08)}
.card h3{margin:0 0 10px;font-size:12px;letter-spacing:.06em;color:var(--mut);font-weight:700}
summary{cursor:pointer;font-weight:600}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-end}
.col{display:flex;flex-direction:column;gap:6px;margin-top:10px}
.fld{display:flex;flex-direction:column;gap:3px;font-size:12px;color:var(--mut)}
.tg{display:flex;gap:8px;align-items:center}
input[type=number],input[type=search]{font:inherit;font-size:16px;color:var(--fg);background:var(--o);border:1px solid var(--l);border-radius:10px;padding:8px 10px;width:84px}
input[type=search]{width:100%;margin-top:8px}
button{font:inherit;color:var(--fg);background:var(--o);border:1px solid var(--l);border-radius:12px;padding:10px 14px;cursor:pointer;transition:transform .08s}
button:active{transform:scale(.97)}button:disabled{opacity:.4}
.pri{background:linear-gradient(135deg,var(--ac),var(--ac2));color:#fff;border:0;font-weight:700}
.big{width:100%;padding:15px;font-size:17px;border-radius:14px}.grow{flex:1}
.seg{display:flex;background:var(--o);border:1px solid var(--l);border-radius:14px;padding:3px;gap:3px}
.seg button{flex:1;border:0;background:transparent;border-radius:11px}
.seg button.on{background:var(--card);box-shadow:0 1px 4px rgba(0,0,0,.18);font-weight:700}
.top{justify-content:space-between;align-items:center}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0 4px}
.chip{background:var(--card);border-radius:999px;padding:3px 12px;font-size:13px;box-shadow:0 1px 2px rgba(20,24,50,.1)}
#msg{min-height:26px;font-weight:600;text-align:center;margin:6px 0}
#g{display:grid;gap:3px;justify-content:center;margin:8px 0 14px;user-select:none;touch-action:manipulation}
.c{width:var(--s);height:var(--s);display:flex;align-items:center;justify-content:center;border-radius:6px;font-weight:800;font-size:calc(var(--s)*.52);cursor:pointer;background:linear-gradient(145deg,var(--c1),var(--c2));box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 1px 2px rgba(0,0,0,.2)}
.o{background:var(--o);box-shadow:inset 0 0 0 1px var(--l);cursor:default}
.x{background:var(--bad);box-shadow:none}
.n1{color:#2563eb}.n2{color:#16a34a}.n3{color:#dc2626}.n4{color:#7c3aed}.n5{color:#b45309}.n6{color:#0891b2}.n7{color:#777}.n8{color:#999}
.hsrc,.hl{outline:3px solid #3b82f6;outline-offset:-1px;animation:pl 1.1s infinite}
@keyframes pl{50%{box-shadow:0 0 0 5px rgba(59,130,246,.3)}}
#md,#ex{position:fixed;inset:0;background:rgba(10,12,25,.55);display:flex;align-items:flex-end;justify-content:center;z-index:9}
#mb,#eb{background:var(--card);width:100%;max-width:640px;max-height:86vh;border-radius:22px 22px 0 0;display:flex;flex-direction:column;padding:16px}
#mb .row,#eb .row{align-items:center;justify-content:space-between}
#ml,#el{overflow:auto;flex:1;margin:10px 0}
.ri{display:flex;gap:10px;align-items:flex-start;padding:10px;border-radius:12px;cursor:pointer}
.ri:hover{background:var(--o)}.ri input{margin-top:5px;width:18px;height:18px}
.tag{font-size:11px;background:var(--o);border:1px solid var(--l);border-radius:6px;padding:0 6px;color:var(--mut);margin-left:6px}
textarea{width:100%;height:150px;font:11px monospace;box-sizing:border-box;margin-top:8px;background:var(--o);color:var(--fg);border:1px solid var(--l);border-radius:10px}
#ex{z-index:10}.ri,#rv{user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
.ri.dis{opacity:.45;cursor:not-allowed}
.mini{--s:30px;display:grid;grid-template-columns:repeat(7,var(--s));gap:2px;justify-content:center;margin:6px 0 10px}
.mini .c{cursor:default}.mini .ctr{background:#3b82f6;color:#fff}.mini .cnt{background:#bfdbfe;color:#1d4ed8}
.bad{outline:3px solid #ef4b5f;outline-offset:-1px}
.hon{outline:2px solid #3b82f6;outline-offset:-2px}
#hb.on{background:#3b82f6;color:#fff;border-color:#3b82f6}
.mk{display:inline-block;filter:hue-rotate(200deg) saturate(1.3);pointer-events:none}
/* チャレンジ: 開始画面の解説・状態バー・終了演出 */
.cht{font-size:20px;font-weight:800;margin-bottom:6px}
.chd p{margin:6px 0;font-size:14px;color:var(--fg)}
.chw{margin-top:12px;padding-top:10px;border-top:1px solid var(--l);font-size:15px}.chw b{font-size:22px}
#fin{position:fixed;inset:0;background:rgba(10,12,25,.6);display:flex;align-items:center;justify-content:center;z-index:20;padding:20px;animation:fin .3s}
#finc{width:100%;max-width:360px;text-align:center;margin:0;position:relative;z-index:1;padding:22px 18px;animation:pop .55s cubic-bezier(.2,1.4,.4,1)}
#fini{font-size:64px;line-height:1.15}#fint{margin:4px 0 2px;font-size:24px}
#fin.win #fini{animation:bob 1s ease-in-out infinite}
#fin.lose #finc{animation:pop .45s cubic-bezier(.2,1.4,.4,1),shk .45s .35s}
#finx{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.pc{position:absolute;top:-40px;animation:fall linear forwards}
@keyframes fin{from{opacity:0}}@keyframes pop{from{transform:scale(.6);opacity:0}}
@keyframes bob{50%{transform:translateY(-8px) rotate(-6deg)}}
@keyframes shk{20%{transform:translateX(-8px)}40%{transform:translateX(8px)}60%{transform:translateX(-5px)}80%{transform:translateX(5px)}}
@keyframes fall{to{transform:translateY(110vh) rotate(720deg)}}
@media(prefers-reduced-motion:reduce){#finx{display:none}#finc,#fin.win #fini,#fin.lose #finc{animation:none}}
.chip.clr{background:linear-gradient(135deg,var(--ac),var(--ac2));color:#fff;font-size:16px;font-weight:800;padding:4px 14px}