:root{--bg:#080d18;--panel:#101827;--water:#17243a;--line:#35445f;--text:#edf4ff;--muted:#b8c5d9;--gold:#f1d38e;--blue:#8fc6ee;--danger:#f19a91}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.65 system-ui,"Yu Gothic",sans-serif}button,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;min-height:44px;border:1px solid var(--line);border-radius:8px;padding:10px 15px;color:var(--text);background:var(--water)}button:disabled{opacity:.5;cursor:default}button:hover:not(:disabled){filter:brightness(1.15)}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--gold);outline-offset:3px}[hidden]{display:none!important}header,footer{max-width:1320px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:22px 40px}header>a{display:flex;align-items:center;gap:12px}.moon{color:var(--gold);font-size:28px;line-height:1}.quiet{background:transparent;color:var(--muted);border-color:transparent}.quiet:hover{border-color:var(--line)}main{max-width:1280px;margin:auto;padding:28px 24px 48px}.intro{display:flex;justify-content:space-between;align-items:center;padding-bottom:28px}.eyebrow{font-size:12px;letter-spacing:.15em;color:var(--gold);margin:0 0 10px}h1{font-family:serif;font-size:66px;letter-spacing:.16em;font-weight:500;line-height:1.1;margin:0}h1 span{font:14px system-ui;letter-spacing:.3em;margin-left:20px;color:var(--muted)}.tagline{font-size:20px;margin:18px 0 0}.intro-note{color:var(--muted);border-left:1px solid var(--line);padding-left:30px;margin-right:6px}.setup{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;border:1px solid var(--line);padding:22px;background:var(--panel);border-radius:12px;margin-bottom:24px}.field{display:flex;flex-direction:column;gap:6px}label{color:var(--muted);font-size:13px}select{width:100%;min-height:44px;border:1px solid var(--line);border-radius:7px;background:var(--bg);padding:8px;color:var(--text)}.start-actions{display:flex;gap:12px;grid-column:1/3}.primary{background:var(--gold);color:#101827;font-weight:700;border-color:var(--gold)}.primary span{margin-left:16px}.secondary{background:transparent}.set-note{grid-column:3/5;margin:0;align-self:center;color:var(--muted);font-size:13px}
.play-layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(330px,1fr);gap:24px;align-items:start}.arena{border:1px solid var(--line);border-radius:14px;background:radial-gradient(ellipse at 50% 45%,#203039,#111d2d 60%,#101827);overflow:hidden;scroll-margin-top:12px}.board-heading{display:flex;justify-content:space-between;gap:12px;padding:15px 22px;color:var(--muted);font-size:13px;border-bottom:1px solid #35445f80}.turn-line{display:flex;gap:14px;align-items:start;padding:18px 22px 0;min-height:87px}.turn-line>span{font-size:24px;color:var(--gold)}.turn-line strong{font-size:16px}.turn-line p{font-size:13px;color:var(--muted);margin:4px 0}.beats{list-style:none;display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:7px;margin:12px 22px 20px;padding:0}.beat{min-width:0;text-align:center;border:1px solid var(--line);border-radius:9px;padding:6px 0;background:#080d1870;line-height:1.35;color:var(--muted)}.beat span{display:block;font-size:12px}.beat strong{display:block;font-size:22px;font-weight:500;margin:4px 0}.beat.negative strong{color:var(--danger)}.beat.current{border:2px solid var(--gold);padding:5px 0;background:#403726}.beat.done{background:#12202b}.beat.done strong{text-decoration:line-through;font-size:18px}.beat.done.p1{border-color:var(--gold)}.beat.done.p2{border-color:var(--blue)}
.hand-section{padding:0 22px}.hand-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:13px;margin-bottom:10px}.hand-heading strong{font-weight:500}.hand-heading>span{color:var(--muted);font-size:12px}.hand{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:8px}.card{position:relative;padding:8px 2px;min-height:98px;width:100%;border:1px solid #68899c;background:#16354a;color:var(--blue);display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;line-height:1.4}.card.p1{background:#3b3527;color:var(--gold);border-color:#a99263}.card strong{font:32px/1.1 Georgia,serif}.card small{font-size:12px;white-space:nowrap}.card:disabled{opacity:1}.card.available{border:2px dashed currentColor;padding:7px 1px}.card.selected{border:3px solid var(--gold);background:#5c4c29;box-shadow:0 0 0 2px #f1d38e40;padding:6px 0}.card.used{background:#111c2a;color:#8da0b7;border-color:#35445f}.card.used strong{font-size:24px;text-decoration:line-through}.card.pending{border-style:double;border-width:3px;color:var(--text);background:#314353;padding:6px 0}.card.cpu-card{border:3px solid var(--text);background:#415169;color:var(--text);padding:6px 0;box-shadow:0 0 0 2px #edf4ff50}.card .counter{font-size:12px;min-height:17px}.card .counter-win{color:var(--text)}.card .counter-lose{color:#c0cfdf}
.duel{text-align:center;padding:20px 22px 18px;min-height:230px}.duel>p{font-size:13px;margin:0 0 12px;color:var(--muted)}.duel>p:last-child{margin:12px 0 0;min-height:22px}.pair{display:flex;justify-content:center;align-items:center;gap:20px}.played{min-width:108px;min-height:120px;border:1px solid currentColor;border-radius:11px;background:#080d1860;display:flex;flex-direction:column;justify-content:center;align-items:center;line-height:1.4}.played strong{font:42px Georgia,serif}.played small{font-size:12px}.played.empty{border-style:dashed;color:var(--muted)}.played.cpu-intent{border:3px solid var(--text);box-shadow:0 0 0 3px #edf4ff45}.played.selected-intent{border:3px solid var(--gold)}.played.winner{background:#354534}.versus{font:18px serif;color:var(--muted)}.p1{color:var(--gold)}.p2{color:var(--blue)}.board-confirm{padding:16px 22px 0;display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center}#board-preview{font-size:13px;color:var(--muted);grid-column:1/-1}.board-confirm #clear{padding:6px 12px}.comparison{margin:20px 22px;border-top:1px solid var(--line);padding-top:10px;font-size:13px;color:var(--muted)}summary{cursor:pointer;min-height:44px}.comparison summary span{float:right;color:var(--gold)}.comparison-wheel{position:relative;width:230px;height:230px;margin:4px auto 12px;border:1px solid #65829c66;border-radius:50%;background:#080d1850}.wheel-number{position:absolute;transform:translate(-50%,-50%);width:40px;height:40px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;background:var(--water);font:20px Georgia,serif;color:var(--muted)}.wheel-number.reference{border:3px solid var(--gold);color:var(--gold);background:#433622}.wheel-number.counter{border:2px double var(--text);color:var(--text);background:#344c61}.wheel-center{position:absolute;inset:72px 40px;display:grid;place-items:center;font-size:12px;line-height:1.7}.comparison p{text-align:center;font-size:13px;margin:4px 0}
.dashboard{display:flex;flex-direction:column;gap:16px}.scoreboard{display:grid;grid-template-columns:1fr 1fr;gap:12px}.player{border:1px solid var(--line);border-radius:11px;background:var(--panel);padding:17px 16px;min-width:0}.player.active{border:2px solid currentColor;padding:16px 15px}.player>span{font-size:13px}.player small{font-size:12px;font-weight:400;margin-left:5px}.player>strong{display:block;font-size:36px;line-height:1.3;font-weight:500;margin:8px 0 4px}.statistics{color:var(--muted);font-size:13px}.stat-note{font-size:12px;color:var(--muted);margin:-5px 0 0}.decision{border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:22px}.decision h2{font-family:serif;font-size:26px;line-height:1.4;margin:0 0 10px}.decision>p:not(.eyebrow){color:var(--muted);font-size:14px;margin:0 0 15px}.preview{background:var(--bg);border-radius:7px;padding:15px;font-size:13px;min-height:105px;color:var(--muted);margin-bottom:14px}.preview strong{display:block;color:var(--text);margin:5px 0}.preview .warning{color:var(--danger)}#confirm,#practice-next,#rematch,#result-help{width:100%;min-height:48px}.small-rule{border-top:1px solid var(--line);padding-top:15px;color:var(--muted);font-size:13px}.small-rule strong{color:var(--text);font-weight:500}.small-rule p{margin:5px 0}.history{border-top:1px solid var(--line);padding-top:13px;color:var(--muted);font-size:13px}.history ol{max-height:260px;overflow:auto;padding-left:22px;margin:0}.history li{margin:7px 0}.history small{display:block;font-size:12px;color:var(--muted)}#result-actions{display:grid;gap:12px}.result-home{font-size:13px;justify-self:center;padding:5px 10px;min-height:44px;display:flex;align-items:center;color:var(--muted)}.footnotes{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:42px;border-top:1px solid var(--line);padding-top:28px}.footnotes b{font-size:12px;letter-spacing:.12em;color:var(--gold);font-weight:400}.footnotes h3{font:20px serif;margin:12px 0}.footnotes p{font-size:14px;color:var(--muted);margin:0}footer{border-top:1px solid #35445f50;color:var(--muted);font-size:12px}dialog{border:1px solid var(--line);border-radius:14px;background:var(--panel);color:var(--text);max-width:620px;width:calc(100% - 28px);padding:28px;max-height:90dvh;overflow:auto}dialog::backdrop{background:#030810c9}dialog h2{font:28px serif;line-height:1.4}dialog p,dialog li{font-size:15px}dialog li{margin:9px 0}dialog ol{padding-left:24px}dialog .close{position:absolute;top:10px;right:10px;font-size:24px;background:none;border:0;padding:2px 10px}.rule-example{background:var(--bg);border-radius:8px;padding:16px;display:grid;gap:8px}.rule-example strong{color:var(--gold);font-size:21px}.rule-example span,.keyboard-note{font-size:13px;color:var(--muted)}
@media(max-width:1100px){header,footer{padding:20px 24px}.play-layout{gap:18px;grid-template-columns:minmax(0,1.6fr) minmax(290px,1fr)}.player{padding:13px 12px}.player.active{padding:12px 11px}.decision{padding:18px}.intro-note{font-size:13px;padding-left:20px}.hand{gap:6px}.hand-section{padding:0 18px}.card{min-height:94px}.card small,.card .counter{font-size:12px}}
@media(max-width:850px){header{padding:18px}main{padding:22px 14px 36px}.intro{padding-bottom:24px}.intro-note{display:none}h1{font-size:52px}h1 span{font-size:13px;margin-left:14px}.tagline{font-size:18px}.setup{grid-template-columns:1fr 1fr;gap:13px;padding:16px;margin-bottom:20px}.start-actions{grid-column:1/-1;gap:10px;flex-wrap:wrap}.set-note{grid-column:1/-1;font-size:12px}.play-layout{display:flex;flex-direction:column;gap:16px}.arena,.dashboard{width:100%}.board-heading{padding:12px 16px;font-size:12px}.turn-line{padding:14px 16px 0;min-height:82px}.turn-line p{font-size:12px}.dashboard{gap:14px}.decision{padding:18px}.decision h2{font-size:24px}.player>strong{font-size:30px}.small-rule{display:none}.footnotes{grid-template-columns:1fr;gap:24px;margin-top:30px}.footnotes h3{font-size:19px}footer{padding:18px 16px;flex-wrap:wrap;gap:8px}.board-confirm{grid-template-columns:1fr auto}.board-confirm>.primary{min-height:48px}}
@media(max-width:500px){.beats{margin:12px 14px 16px;gap:4px}.beat span{font-size:10px}.beat strong{font-size:19px}.beat.done strong{font-size:17px}.hand{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.hand-section{padding:0 14px}.card{min-height:80px;gap:3px}.card strong{font-size:27px}.card small,.card .counter{font-size:11px}.card.used strong{font-size:22px}.hand-heading{font-size:12px;margin-bottom:8px}.hand-heading>span{font-size:11px}.duel{min-height:202px;padding:16px 14px}.played{min-width:95px;min-height:105px}.played strong{font-size:36px}.duel>p{font-size:12px}.pair{gap:16px}.board-confirm{padding:14px}#board-preview{font-size:12px}.comparison{margin:12px 14px 16px}.stat-note{font-size:12px}.hand .card:last-child{grid-column:auto}}
.duel>.duel-scores{color:var(--text);margin:12px 0 0}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}