:root{--paper:#f4f1e9;--ink:#303c32;--muted:#7c8275;--green:#355a46;--line:#dcded2;--gold:#a26f38;--serif:'Songti SC','STSong','Noto Serif CJK SC',serif;--sans:'PingFang SC','Microsoft YaHei',sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:14px;background-image:radial-gradient(ellipse at 10% 45%,#e9eadf80,transparent 50%)}button,a,input,summary{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;color:inherit}button:disabled{cursor:default;opacity:.38}button:not(:disabled):active{transform:translateY(1px)}button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--green);outline-offset:4px}a{color:inherit}button{transition:background .2s,transform .15s,opacity .2s}button:hover:not(:disabled){filter:brightness(.95)}[hidden]{display:none!important}.shell{width:min(1180px,calc(100% - 80px));margin:auto}.topbar{height:112px;display:flex;align-items:center;border-bottom:1px solid var(--line);gap:35px}.brand{display:flex;gap:13px;align-items:center;text-decoration:none;font-family:var(--serif);font-size:26px;letter-spacing:4px}.brand small{display:block;font:8px/2 var(--sans);letter-spacing:2px}.brand-mark{font-size:26px;letter-spacing:0;color:#f7f4ea;background:var(--green);width:45px;height:45px;display:grid;place-items:center;border-radius:3px}.header-note{font:13px var(--serif);letter-spacing:2px;color:var(--muted)}nav{margin-left:auto;display:flex;align-items:center;gap:12px}.icon-button{border:1px solid var(--line);background:transparent;width:36px;height:36px;border-radius:50%;font-size:21px;line-height:1}.icon-button.off{color:#a0a294}.help-button{background:transparent;border:0;padding:10px 0 10px 16px;font-size:12px}.help-button span{border:1px solid #a5ac9e;border-radius:50%;padding:0 4px;margin-left:4px;font-size:10px}.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:60px;padding:39px 0 34px;align-items:start}.board-column{min-width:0}.board-caption{display:flex;justify-content:space-between;align-items:center;font-size:12px;margin-bottom:17px;color:#65725e}.board-caption>span:first-child{display:flex;align-items:center;gap:8px}.live-dot{width:5px;height:5px;border-radius:50%;background:var(--green)}#move-label{font-variant-numeric:tabular-nums;letter-spacing:1px}.board-frame{position:relative;border-radius:7px;background:#bd9258;box-shadow:0 4px 0 #9e7948,0 6px 0 #87663b,0 16px 28px -14px #4c391973;overflow:hidden;padding:10px;background-image:linear-gradient(125deg,#dfbb83,#ba8e54)}canvas{display:block;width:100%;aspect-ratio:1;border-radius:3px;touch-action:none;user-select:none;-webkit-user-select:none;cursor:crosshair;outline:none;box-shadow:0 0 0 1px #a17d48,0 1px 1px #f2d39e inset}canvas:focus-visible{outline:2px solid var(--green);outline-offset:-4px}.empty-note{pointer-events:none;position:absolute;bottom:20%;left:0;width:100%;text-align:center;color:#735635;transition:opacity .3s}.empty-note span{font:19px var(--serif);letter-spacing:5px;display:block}.empty-note small{display:block;font-size:11px;margin-top:12px;letter-spacing:2px;opacity:.7}.empty-note.faded{opacity:0}#loupe{display:none;pointer-events:none;position:absolute;width:108px;height:108px;border:3px solid #fcf7e9;border-radius:50%;background-repeat:no-repeat;box-shadow:0 5px 20px #0004;z-index:3}.board-foot{display:flex;justify-content:space-between;color:var(--muted);font-size:10px;letter-spacing:.4px;padding:20px 2px 0;gap:8px}.board-foot label{display:flex;align-items:center;gap:4px;white-space:nowrap}.board-foot input{accent-color:var(--green);width:12px;height:12px;margin:0}.intro{padding:0 0 23px}.eyebrow{font-size:9px;letter-spacing:2px;color:#8a927f;font-weight:600}.intro h1{font:46px/1.38 var(--serif);letter-spacing:6px;margin:14px 0 13px;font-weight:500}.intro p{font-size:12px;color:var(--muted);margin:0;letter-spacing:1px}.match-panel{padding:18px;background:#ebece2;border:1px solid #dde0d2;border-radius:5px}.player{display:flex;align-items:center;gap:12px;border-radius:4px;position:relative}.player.active:before{content:'';position:absolute;left:-19px;top:10%;height:80%;width:3px;background:var(--green);border-radius:2px}.player-stone{width:35px;height:35px;border-radius:50%;flex-shrink:0;box-shadow:1px 3px 4px #0003}.black{background:radial-gradient(circle at 35% 27%,#555751,#252824 60%,#10150f)}.white{background:radial-gradient(circle at 35% 27%,#fffef7,#eeece2 65%,#d0cfc6);border:1px solid #d8d8cc}.player strong{font-size:13px;font-weight:500}.player small{display:block;font-size:10px;color:var(--muted);margin-top:5px}.capture{margin-left:auto;text-align:center}.capture b{font-size:20px;font-weight:400;font-family:Georgia,serif}.capture small{font-size:9px;margin-top:2px}.player-separator{display:flex;align-items:center;gap:8px;font-size:9px;color:#8b9380;margin:17px 0}.player-separator i{height:1px;flex:1;background:#d7dccb}.turn-status{display:flex;gap:12px;align-items:flex-start;min-height:80px;padding:23px 0 16px}.status-icon{font-size:12px;color:var(--green);line-height:20px}.thinking .status-icon{animation:breathe 1.3s infinite}.turn-status strong{font-size:13px;display:block;font-weight:500}.turn-status small{font-size:10px;color:var(--muted);display:block;margin-top:6px;line-height:1.7}.controls{display:grid;grid-template-columns:1fr 1fr;gap:10px}.primary,.secondary{border-radius:4px;min-height:43px;padding:10px 15px;font-size:12px;letter-spacing:1px}.primary{border:1px solid var(--green);background:var(--green);color:#faf7ed}.primary:hover{background:#284b39}.secondary{border:1px solid #d4d9c8;background:#f9f8f2}.secondary span{font-size:18px;vertical-align:-1px;margin-right:4px}.controls .primary{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between}.controls .primary span{font-size:19px}.extras{display:flex;justify-content:center;align-items:center;gap:10px;font-size:10px;color:#8a9082;padding:18px 0}.extras button{padding:0;border:0;background:none;font-size:10px}.small-guide{border-top:1px solid var(--line);padding:17px 0 0;font-size:10px;color:#848e7b}.small-guide summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between}.small-guide summary::-webkit-details-marker{display:none}.small-guide ol{padding-left:18px;line-height:1.9}.small-guide li{padding:5px 0}.small-guide b{font-weight:500;color:var(--ink)}.page-footer{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:22px 0 28px;font-size:10px;letter-spacing:1px;color:#909787}.page-footer i{font-style:normal;margin:0 10px;color:#bbc1ae}#toast{position:fixed;left:50%;bottom:35px;transform:translate(-50%,15px);background:#303c32ed;color:#f8f6ef;padding:12px 24px;border-radius:30px;font-size:12px;pointer-events:none;opacity:0;transition:.2s;z-index:20;max-width:90vw;text-align:center}#toast.show{opacity:1;transform:translate(-50%,0)}dialog{border:1px solid #dce0d1;border-radius:10px;padding:32px;max-width:460px;width:calc(100% - 36px);max-height:90dvh;overflow:auto;background:var(--paper);color:var(--ink);box-shadow:0 20px 90px #17261833}dialog::backdrop{background:#25312555;backdrop-filter:blur(6px)}dialog h2{font:30px var(--serif);margin:13px 0}dialog p{font-size:12px;line-height:1.9;color:#727e69}fieldset{border:0;padding:0;margin:23px 0}legend{font-size:12px;margin-bottom:12px}legend small{font-size:9px;color:var(--muted);margin-left:5px}.choice-row{display:flex;gap:8px}.choice-row label{flex:1;cursor:pointer}.choice-row input{position:absolute;opacity:0;width:1px}.choice-row label>span{display:block;border:1px solid #d7ddce;padding:12px 6px;text-align:center;border-radius:4px;background:#faf9f3}.choice-row b{font-size:13px;font-weight:500}.choice-row small{display:block;font-size:9px;color:var(--muted);margin-top:7px}.choice-row input:checked+span{border-color:var(--green);background:#e5ecdf;box-shadow:0 0 0 1px var(--green)}.choice-row input:focus-visible+span{outline:2px solid var(--green);outline-offset:4px}.dialog-actions{display:flex;gap:10px;margin-top:22px}.dialog-actions>*{flex:1}#new-warning{font-size:10px;color:#a27e58}#help-dialog>.primary{width:100%;margin-top:20px}#help-dialog>a{font-size:10px;color:var(--green);text-underline-offset:4px}.rule-diagram{display:grid;grid-template-columns:repeat(3,28px);gap:6px;justify-content:center;margin:16px}.rule-diagram span{height:28px;display:grid;place-items:center}.d-black,.d-white{border-radius:50%;box-shadow:1px 2px 2px #0002}.d-black{background:#30352e}.d-white{background:#fffef5;border:1px solid #b7baa9}.d-liberty{color:#a57540;font:14px var(--serif)}.help-shortcuts{padding-top:12px;border-top:1px solid var(--line)}#scoring-panel,#result-panel{background:#e9eddf;padding:16px;border-radius:5px;margin-top:13px}#scoring-panel h2,#result-panel h2{font:25px var(--serif);margin:0 0 10px}#scoring-panel p,#result-panel p{font-size:11px;color:#77836b;line-height:1.8}#scoring-panel .primary{width:100%}.score-line{display:flex;justify-content:space-between;margin:18px 0;font-size:12px}.score-line b{font:25px Georgia,serif;margin-left:10px}.text-button{padding:10px 0;background:none;border:0;font-size:11px;color:var(--green);text-decoration:underline;text-underline-offset:4px}#scoring-panel .text-button{display:block;margin:auto}#result-panel .eyebrow{font-size:8px}#result-panel h2{margin-top:10px}@keyframes breathe{50%{opacity:.3}}@media(min-width:1500px){.shell{width:1220px}.game-layout{grid-template-columns:minmax(0,1fr) 300px;gap:75px}.intro{padding:20px 0 34px}.intro h1{font-size:51px}}@media(max-width:1050px){.shell{width:calc(100% - 48px)}.game-layout{gap:32px;grid-template-columns:minmax(0,1fr) 260px}.intro h1{font-size:38px}.topbar{height:92px}.intro{padding-bottom:18px}}@media(max-width:740px){.shell{width:calc(100% - 28px)}.topbar{height:76px;gap:12px}.brand{font-size:23px;gap:8px}.brand small{font-size:6px;letter-spacing:1.2px}.brand-mark{width:35px;height:35px;font-size:23px}.header-note{display:none}nav{gap:8px}.icon-button{width:31px;height:31px;font-size:19px}.help-button{font-size:11px;padding-left:3px}.help-button span{display:none}.game-layout{display:flex;flex-direction:column;padding-top:20px;gap:22px}.board-column{width:100%}.board-caption{font-size:10px;margin-bottom:12px}.board-frame{padding:7px;border-radius:5px}.board-foot{padding-top:17px;font-size:9px}.side-column{width:100%;display:grid;grid-template-columns:1fr 1fr;gap:0 15px}.intro{display:none}.match-panel{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:25px;padding:16px}.player-separator{display:none}.player+.player{border-left:1px solid var(--line)}.player.active:before{left:-9px}.player strong{font-size:12px}.player small{font-size:9px}.player-stone{width:29px;height:29px}.capture b{font-size:17px}.capture small{font-size:8px}.turn-status{grid-column:1/-1;min-height:66px;padding:18px 0 14px}.controls{grid-column:1/-1;grid-template-columns:1fr 1fr 1.4fr;gap:8px}.controls .primary{grid-column:auto;min-height:43px;font-size:11px;letter-spacing:0;padding:10px}.controls .primary span{font-size:16px}.secondary{font-size:11px;padding:8px}.extras,.small-guide,#scoring-panel,#result-panel{grid-column:1/-1}.extras{padding:16px 0}.small-guide{padding:15px 0 0}.page-footer{font-size:8px;letter-spacing:0;line-height:1.8;padding:17px 0}.page-footer>span:last-child{font-size:8px}.page-footer i{margin:0 3px}.empty-note span{font-size:16px;letter-spacing:3px}.empty-note small{font-size:9px;letter-spacing:1px;margin-top:8px}.empty-note{bottom:18%}}@media(max-width:350px){.help-button{display:none}.capture{display:none}.controls .primary{font-size:10px}}@media(prefers-reduced-motion:reduce){*,*:before{animation:none!important;transition:none!important}}
/* Keep the whole board visible in the hall's shorter desktop iframe. */
@media(min-width:741px) and (min-height:851px){.board-column{width:min(100%,calc(100dvh - 245px));justify-self:center}}
@media(min-width:741px) and (min-height:540px) and (max-height:850px){.topbar{height:70px}.game-layout{padding:22px 0 20px;grid-template-columns:minmax(0,1fr) 270px;gap:35px}.board-column{width:min(100%,calc(100dvh - 181px));justify-self:center}.intro{padding:0 0 18px}.intro h1{font-size:33px;line-height:1.25;margin:10px 0}.intro p{font-size:11px}.match-panel{padding:14px}.player-separator{margin:12px 0}.turn-status{padding:17px 0 12px;min-height:70px}.small-guide{padding-top:13px}.page-footer{padding:15px 0}.board-foot{padding-top:16px}}
@media(max-width:360px){.player>div{min-width:0}.player small{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.player strong{font-size:11px;white-space:nowrap}.controls .secondary{font-size:10px;padding:8px 4px;white-space:nowrap}.controls .secondary span{font-size:15px;margin-right:2px}.controls .primary{white-space:nowrap}}

.go-practice-entry{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px;margin-top:12px;border:1px solid #d5dfc8;background:#e8eddf;border-radius:4px;text-decoration:none;font-size:10px;color:#708163}.go-practice-entry strong{font-weight:500;color:var(--green);font-size:12px}@media(max-width:740px){.go-practice-entry{grid-column:1/-1;font-size:10px}.go-practice-entry strong{font-size:11px}}