@font-face{font-family:Plex;src:url('/chess/fonts/IBMPlexMono-Regular.woff2') format('woff2');font-display:swap}
:root{color-scheme:dark;--bg:#080d16;--ink:#e6eaf0;--muted:#99a8ba;--line:#a4bfdd24;--gold:#eab57e;--blue:#a6d8ef;--mono:Plex,monospace;--sans:'Noto Sans JP','Yu Gothic',sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.7 var(--sans);overflow-x:hidden}button,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{border:1px solid var(--line);border-radius:4px;background:#121b27;color:var(--ink);padding:10px 15px;cursor:pointer;transition:background .2s,border-color .2s,color .2s}button:hover:not(:disabled){background:#233142;border-color:#8ca3ba7a}button:disabled{opacity:.35;cursor:not-allowed}button:focus-visible,a:focus-visible,select:focus-visible{outline:2px solid var(--gold);outline-offset:4px}a{color:inherit;text-decoration:none}a:hover{color:var(--gold)}[hidden]{display:none!important}h1,h2,h3,p{margin:0}button.primary{background:var(--gold);border-color:var(--gold);color:#161416;font-weight:700}button.primary:hover{background:#f4cea7;color:#161416}.text-button{border:0;background:transparent;padding:5px 0;font-size:12px;color:var(--muted);border-radius:0}.text-button:hover:not(:disabled){background:transparent;color:var(--gold)}.text-button[aria-pressed=true]{color:var(--gold)}.skip-link{position:fixed;top:-100px;left:20px;z-index:10;background:var(--bg);padding:15px}.skip-link:focus{top:10px}#cosmos{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:-1}.masthead,main,footer{width:min(1180px,calc(100% - 80px));margin-inline:auto}.masthead{height:86px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.wordmark{display:flex;align-items:center;gap:10px;font:21px var(--mono);letter-spacing:.16em}.wordmark b{font-weight:400;color:var(--gold)}.brand-orbit{width:24px;height:24px;border:1px solid var(--gold);border-radius:50%;position:relative;margin-right:6px;box-shadow:0 0 15px #d49f6920}.brand-orbit:after{content:'';position:absolute;inset:7px -6px;border:1px solid #f4d7ac;border-radius:50%;transform:rotate(-35deg)}.edition{font:9px var(--mono);letter-spacing:.17em;color:var(--muted);border-left:1px solid var(--line);padding-left:19px;margin-left:8px}.masthead nav{display:flex;gap:29px;font:11px var(--mono);letter-spacing:.08em;color:var(--muted)}.masthead .active{color:var(--gold)}.active span{font:10px var(--sans);margin-left:7px}.hero{position:relative;min-height:347px;display:flex;align-items:center;isolation:isolate}.hero-copy{position:relative;z-index:2;padding:35px 0 38px}.eyebrow{font:10px/1.6 var(--mono);letter-spacing:.15em;color:var(--gold)}.hero .eyebrow{display:flex;align-items:center;gap:10px}.hero .eyebrow>span{width:20px;height:1px;background:var(--gold)}h1{font-size:clamp(35px,4vw,50px);font-weight:500;line-height:1.4;letter-spacing:.13em;margin:17px 0 13px}h1 span{color:#dec2a0}.lead{font-size:13px;line-height:1.95;color:var(--muted);letter-spacing:.08em}.hero-index{position:absolute;right:0;bottom:30px;font:11px var(--mono);letter-spacing:.1em;color:#8498ae}.hero-hole{position:absolute;z-index:-1;width:520px;height:300px;left:47%;top:30px;transform:rotate(-17deg);pointer-events:none}.hole-halo{position:absolute;inset:-20px;background:radial-gradient(ellipse at center,#d3977033 0%,#c7826814 25%,#9d675509 42%,transparent 65%);filter:blur(18px)}.hole-core{position:absolute;width:176px;height:176px;left:172px;top:61px;border-radius:50%;background:#04060b;border:2px solid #ffe2b1;box-shadow:0 0 9px #ffdb9a,0 0 23px #f0a964b0,0 0 55px #d782452c,inset 0 0 16px #a16d4c70}.hole-core:after{content:'';position:absolute;inset:-17px;border:1px solid #dcb28230;border-radius:50%;box-shadow:0 0 12px #dea56815}.hole-disk{position:absolute;z-index:2;inset:105px 20px 103px;border:2px solid #fbd5a5;border-radius:50%;box-shadow:0 2px 9px #ffe6be90,inset 0 -3px 7px #edb68170,0 7px 20px #e9a37124;transform:rotate(-3deg);background:linear-gradient(transparent 40%,#fff4d612 63%,transparent 68%)}.hole-disk:before,.hole-disk:after{content:'';position:absolute;inset:7px -22px;border:1px solid #d4a27560;border-radius:50%}.hole-disk:after{inset:-15px 25px;border-color:#c58c5b24}.hole-coordinate{position:absolute;left:310px;top:256px;transform:rotate(17deg);font:9px/2 var(--mono);letter-spacing:.16em;color:#a79079;border-left:1px solid #a7907940;padding-left:12px}.room-heading{display:flex;align-items:center;justify-content:space-between;padding:18px 0;border-top:1px solid var(--line)}.room-heading>div{display:flex;align-items:center;gap:10px}.room-heading h2{font-size:14px;font-weight:400;letter-spacing:.06em}.live-dot{width:5px;height:5px;background:#b2d1d4;border-radius:50%;box-shadow:0 0 9px #b2d1d488}.room-heading>span{font:10px var(--mono);letter-spacing:.1em;color:var(--muted)}.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:38px;padding:0 0 36px}.board-column{min-width:0}.board-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:45px;padding:0 3px 13px}.board-toolbar p{font-size:13px;color:#d5bc9b}.board-toolbar>span{flex:none;font:10px var(--mono);color:var(--muted)}.board-frame{position:relative;isolation:isolate;aspect-ratio:1;max-width:710px;margin:auto;border:1px solid #7892b037;background:radial-gradient(ellipse at 30% 80%,#283a5329,transparent 60%),radial-gradient(ellipse at 75% 20%,#745c4730,transparent 70%),#0c1420c9;box-shadow:0 20px 65px #0005,inset 0 0 55px #0509109c}.board-frame:before,.board-frame:after{content:'';position:absolute;pointer-events:none;width:30px;height:30px;border:1px solid #a8c8dd80;z-index:3}.board-frame:before{left:-1px;top:-1px;border-right:0;border-bottom:0}.board-frame:after{bottom:-1px;right:-1px;border-left:0;border-top:0}.board-aura{position:absolute;inset:10%;z-index:-1;background:radial-gradient(ellipse at 45% 60%,#42687613,transparent 65%);filter:blur(18px)}.board{--size:9;display:grid;grid-template-rows:repeat(var(--size),1fr);position:absolute;inset:5%;outline:none}.board-row{display:grid;grid-template-columns:repeat(var(--size),1fr)}.intersection{position:relative;display:flex;align-items:center;justify-content:center;padding:0;border:0;border-radius:0;background:transparent;min-width:0;aspect-ratio:1;isolation:isolate;outline-offset:-1px!important}.intersection:before,.intersection:after{content:'';position:absolute;z-index:-1;pointer-events:none;background:#829eb44b}.intersection:before{height:1px;left:0;right:0;top:50%}.intersection:after{width:1px;top:0;bottom:0;left:50%}.intersection.first-col:before{left:50%}.intersection.last-col:before{right:50%}.intersection.first-row:after{top:50%}.intersection.last-row:after{bottom:50%}.intersection:hover:not(:disabled){background:transparent;border:0}.intersection:disabled{opacity:1;cursor:default}.intersection .stone{width:70%;height:70%;border-radius:50%;display:block;position:relative;pointer-events:none}.intersection[data-color="0"]:hover .stone,.intersection[data-color="0"]:focus-visible .stone{border:1px dashed #dab17b9c;background:#d1b69212}.intersection[data-color="0"][aria-disabled=true]:hover .stone{border:0;background:transparent}.stone.black,.player-stone.black{background:radial-gradient(circle at 40% 35%,#17151a,#03050a 64%);border:1px solid #f1c18c;box-shadow:0 0 4px #ffe1afcc,0 0 13px #d987464d,inset 0 0 6px #c1844850}.stone.black:before,.player-stone.black:before{content:'';position:absolute;inset:26% -17%;border:1px solid #dfb38180;border-radius:50%;transform:rotate(-30deg);box-shadow:0 0 3px #ffd29e33}.stone.white,.player-stone.white{background:radial-gradient(circle at 37% 30%,#fff 0%,#edf9ff 25%,#b8d5e8 61%,#5687a7 96%);box-shadow:0 0 9px #bce9ff80,0 0 22px #c1e8ff27,inset -2px -2px 7px #37658575;border:1px solid #e5f9ffb0}.intersection .hoshi{position:absolute;inset:calc(50% - 2.5px);width:5px;height:5px;border-radius:50%;background:#a7b9cacc;z-index:-1}.intersection.last-move .stone:after{content:'';position:absolute;width:20%;height:20%;left:40%;top:40%;border:1px solid var(--gold);border-radius:50%;box-sizing:border-box}.intersection.last-move .stone.black:after{border-color:#fff2d8}.intersection.last-move .stone.white:after{border-color:#334f65}.intersection.atari .stone{outline:1px dashed #dc875f;outline-offset:4px}.intersection.liberty .stone{background:#a7e4de99;width:12%;height:12%;box-shadow:0 0 9px #99e8de90}.intersection.dead .stone{opacity:.25}.intersection.dead .stone:after{content:'×';position:absolute;inset:0;display:grid;place-items:center;color:#fa9674;font-size:24px}.intersection.territory-black[data-color="0"] .stone,.intersection.territory-white[data-color="0"] .stone{width:15%;height:15%;border-radius:1px;background:#db9b5f99;box-shadow:0 0 8px #ce945129}.intersection.territory-white[data-color="0"] .stone{background:#b2ddecaa}.coordinate{position:absolute;font:9px var(--mono);color:#7e95aa;pointer-events:none}.coordinate.col{bottom:calc(100% + 6px);left:0;right:0;text-align:center}.coordinate.row{right:calc(100% + 8px);top:50%;transform:translateY(-50%)}#capture-canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:4}.capture-caption{position:absolute;bottom:8%;left:0;right:0;text-align:center;pointer-events:none;z-index:5;font:11px var(--mono);color:#ffe0b6;letter-spacing:.22em;text-shadow:0 0 15px #ee9f59;opacity:0}.capture-caption.visible{opacity:1}.board-caption{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px}.board-caption p{font-size:11px;color:var(--muted)}.board-caption button{white-space:nowrap}.notice{font-size:12px;min-height:29px;color:var(--gold);padding-top:4px}.game-actions{display:grid;grid-template-columns:1fr 1fr 1.45fr;gap:9px}.game-actions button{background:#101925a6;display:flex;justify-content:space-between;align-items:center;font-size:12px;gap:10px;padding:12px 13px}.game-actions button span{font:9px var(--mono);color:var(--muted)}#new-game{border-color:#d1a16f55;color:#e5bf94}.side-panel{border-left:1px solid var(--line);padding-left:28px;min-width:0}.panel-label{display:flex;align-items:center;justify-content:space-between;font:9px var(--mono);letter-spacing:.06em;color:#90a4b8;margin-bottom:21px;min-height:27px}.player-card{display:flex;align-items:center;gap:18px;padding:17px 0;border-top:1px solid var(--line);position:relative}.player-card.active-player:after{content:'';position:absolute;right:0;top:10px;width:4px;height:4px;background:var(--gold);border-radius:50%;box-shadow:0 0 9px #eabc8270}.player-stone{flex:none;position:relative;width:37px;height:37px;border-radius:50%}.micro{font:9px/1.7 var(--mono);color:var(--muted);letter-spacing:.08em}.player-card .micro{font-size:8px}.player-card h3{font-size:16px;font-weight:500;margin:3px 0}.player-role{font-size:11px;color:var(--muted)}.captures{margin-left:auto;display:flex;flex-direction:column;align-items:center}.captures strong{font:25px var(--mono);font-weight:400}.captures span{font-size:9px;color:var(--muted)}.versus{display:flex;align-items:center;gap:9px;margin:0 0 10px}.versus small{color:#788ba0;font-size:9px;white-space:nowrap}.versus>span{height:1px;background:var(--line);flex:1}.white-player{border-top:0;padding-top:4px}.transmission{padding:19px 0;margin-top:17px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.tiny-star{color:var(--gold);font-size:14px;margin-right:5px}.transmission>p:nth-child(2){font-size:13px;color:#d5d8df;line-height:2;margin-top:10px;min-height:52px}.signal{height:18px;display:flex;gap:4px;align-items:center;margin-top:11px;opacity:.45}.signal i{height:3px;width:2px;background:var(--gold)}.signal i:nth-child(3n){height:7px}.signal i:nth-child(4n){height:15px}.signal i:nth-child(5n){height:10px}.log-heading{display:flex;align-items:center;justify-content:space-between;margin:20px 0 10px}.log-heading h3{font-size:12px;font-weight:400}.log-heading span{font:8px var(--mono);letter-spacing:.1em;color:var(--muted)}.move-log{list-style:none;padding:0;margin:0;min-height:110px;max-height:174px;overflow:auto}.move-log li{display:flex;gap:12px;align-items:center;border-bottom:1px solid #92a6c30e;font-size:11px;padding:6px 0;color:#b7c4d1}.move-log .empty-log{color:#788da1;font-size:12px;padding:13px 0;border:0}.log-number{font:9px var(--mono);color:#71869c;width:24px}.log-stone{width:8px;height:8px;border-radius:50%;background:#080c14;border:1px solid var(--gold)}.log-stone.white{background:#dfedfa;border-color:#dfedfa}.log-capture{margin-left:auto;color:var(--gold)}.settings{display:flex;gap:8px;border-top:1px solid var(--line);margin-top:18px;padding-top:15px}.settings button{font-size:11px;padding:5px 9px;background:transparent;color:var(--muted)}.settings button[aria-pressed=true]{color:var(--gold);border-color:#d4ad7f44}#resign{margin-left:auto}.save-note{font-size:10px;color:#788b9e;margin-top:13px}.field-guide{display:grid;grid-template-columns:1.2fr 1fr 1.15fr 1.2fr;gap:38px;border-top:1px solid var(--line);padding:36px 0 44px}.guide-title .eyebrow{font-size:9px}.guide-title h2{font-size:23px;font-weight:400;line-height:1.65;margin-top:12px;letter-spacing:.1em}.guide-number{font:11px var(--mono);color:var(--gold)}.field-guide article{padding-top:3px}.field-guide h3{font-size:16px;font-weight:400;margin:12px 0 8px}.field-guide article p{font-size:12px;color:var(--muted);line-height:1.9}footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:20px;padding:25px 0 30px;font:9px var(--mono);color:#7b8fa5;letter-spacing:.08em}footer a{color:#c3cbd7;font-size:11px}footer a span{margin-left:14px}footer p{font-size:8px}.score-panel{padding:17px 14px;background:#101c27;border:1px solid #718fa343;border-radius:4px;margin-top:17px}.score-panel h3{font-size:15px;margin:8px 0}.score-panel p{font-size:11px;color:var(--muted)}.score-values{display:flex;gap:15px;padding:15px 0}.score-values>div{flex:1;display:flex;flex-direction:column}.score-values span{font-size:10px;color:var(--muted)}.score-values strong{font:28px var(--mono);color:var(--gold)}.score-values>div+div strong{color:var(--blue)}.score-values small{font-size:9px;line-height:1.5;color:var(--muted);margin-top:6px}.score-actions{display:flex;gap:7px;margin-top:12px}.score-actions button{font-size:11px;padding:8px}#score-result{font-size:14px;color:#f1d5b0}dialog{border:1px solid #758ba652;border-radius:8px;background:#0f1824;color:var(--ink);padding:32px;max-width:min(560px,calc(100% - 32px));width:100%;box-shadow:0 40px 100px #000a}dialog::backdrop{background:#030712ba;backdrop-filter:blur(7px)}dialog h2{font-size:24px;font-weight:500;margin:12px 0 16px}dialog p,dialog li{font-size:13px;line-height:1.9;color:#afbecd}dialog>p+p{margin-top:14px}dialog label{display:block;margin:22px 0 8px;color:#b6c2d0;font-size:12px}dialog select{width:100%;padding:12px;border:1px solid #7e96b24d;border-radius:4px;background:#172433;color:var(--ink)}dialog .dialog-note{font-size:11px;color:#879aad;margin-top:18px}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:24px}.dialog-actions button{font-size:12px}dialog ul{padding-left:21px}dialog li{margin:10px 0}.noscript{position:fixed;bottom:0;left:0;right:0;background:#281811;color:white;text-align:center;padding:15px}
@media(min-width:1450px){.hero{min-height:375px}.hero-hole{top:46px}}
@media(max-width:1050px){.masthead,main,footer{width:calc(100% - 48px)}.game-layout{grid-template-columns:minmax(0,1fr) 275px;gap:25px}.side-panel{padding-left:20px}.player-card{gap:12px}.player-card h3{font-size:14px}.player-stone{width:30px;height:30px}.hero-hole{left:43%;transform:scale(.9) rotate(-17deg)}.field-guide{gap:24px}.game-actions button{display:block}.game-actions button span{display:block;font-size:8px;margin-top:3px}.board-caption{align-items:flex-start}.board-caption p{max-width:65%}.edition{display:none}.coordinate{font-size:8px}.coordinate.col{bottom:calc(100% + 3px)}.coordinate.row{right:calc(100% + 5px)}}
@media(max-width:760px){.masthead,main,footer{width:calc(100% - 36px)}.masthead{height:70px}.wordmark{font-size:17px;gap:7px}.brand-orbit{width:21px;height:21px}.masthead nav{gap:17px;font-size:9px}.active span{display:none}.hero{min-height:330px}.hero-hole{left:auto;right:-120px;top:5px;opacity:.6;transform:scale(.78) rotate(-17deg)}.hero-copy{padding-block:29px}.hero .eyebrow{font-size:8px}h1{font-size:37px;letter-spacing:.09em}.hero-index{font-size:9px;bottom:26px}.hole-coordinate{display:none}.lead{font-size:12px}.room-heading{padding:16px 0}.room-heading h2{font-size:12px}.room-heading>span{font-size:8px}.game-layout{grid-template-columns:1fr;gap:25px}.board-toolbar{padding-bottom:12px;min-height:42px}.board-toolbar p{font-size:12px}.board-toolbar>span{font-size:9px}.side-panel{border-left:0;padding:0;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;column-gap:26px}.panel-label{grid-column:1/-1;margin:13px 0 9px}.player-card{border-top:0;padding:10px 0}.white-player{padding-top:10px}.player-card h3{font-size:14px}.player-role{font-size:10px}.player-card .micro{font-size:7px}.versus{display:none}.captures strong{font-size:22px}.transmission{grid-column:1/-1;margin-top:18px;padding:17px 0;position:relative}.transmission>p:nth-child(2){min-height:0;font-size:12px;margin-top:8px}.transmission br{display:none}.signal{position:absolute;right:8px;top:12px}.log-heading,.move-log,.settings,.save-note,.score-panel{grid-column:1/-1}.move-log{min-height:45px;max-height:135px;display:grid;grid-template-columns:1fr 1fr;column-gap:25px}.move-log .empty-log{grid-column:1/-1}.log-heading{margin:17px 0 6px}.settings{margin-top:12px}.game-actions button{display:flex;padding:13px 10px}.game-actions button span{margin:0}.field-guide{grid-template-columns:1fr 1fr;gap:25px 20px;padding:29px 0}.guide-title h2{font-size:20px;margin-top:9px}.field-guide h3{font-size:15px}.field-guide article p{font-size:11px}.field-guide article{padding-top:0}.field-guide .eyebrow{font-size:8px}footer{flex-wrap:wrap;padding:20px 0;gap:14px}footer p{order:3;width:100%;font-size:7px}footer>span{font-size:8px}.score-values{padding:13px 0}.score-values strong{font-size:30px}.score-actions button{flex:1}.board-caption p{font-size:10px;max-width:64%}.board-caption button{font-size:10px}.notice{font-size:11px}.coordinate{font-size:8px}.coordinate.col{bottom:calc(100% + 4px)}.coordinate.row{right:calc(100% + 5px)}.board[data-size="19"] .coordinate{font-size:6px}.board[data-size="19"] .intersection.atari .stone{outline-offset:1px}.board[data-size="19"] .hoshi{width:3px;height:3px;inset:calc(50% - 1.5px)}}
@media(max-width:380px){.masthead,main,footer{width:calc(100% - 24px)}.wordmark{font-size:15px}.masthead nav{gap:12px}.hero-hole{right:-167px;opacity:.45}h1{font-size:34px}.room-heading>span{font-size:7px}.game-actions{gap:6px}.game-actions button{font-size:11px;display:block}.game-actions button span{margin-top:3px}.side-panel{column-gap:18px}.player-card{gap:10px}.player-card h3{font-size:12px}.player-role{font-size:9px}.player-stone{width:27px;height:27px}.coordinate.col{bottom:calc(100% + 2px)}.coordinate.row{right:calc(100% + 3px)}dialog{padding:23px}dialog h2{font-size:22px}}
.hero{overflow:clip}
@media(max-width:760px){.hero-hole{opacity:.44;mask-image:linear-gradient(90deg,transparent 5%,#000 48%)}.game-actions button{display:block;white-space:nowrap}.game-actions button span{display:block;margin-top:4px}.player-card{gap:10px}.player-card h3{font-size:12px}.player-stone{width:28px;height:28px}.field-guide article br{display:none}}
@media(max-width:380px){.player-card{gap:8px}.player-stone{width:25px;height:25px}.player-card h3{font-size:11px}.captures strong{font-size:19px}.game-actions button{padding-inline:7px}.hero-hole{opacity:.35}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}