@font-face{font-family:Inter;src:url('./InterVariable.woff2') format('woff2');font-style:normal;font-weight:100 900;font-display:swap}
:root{color-scheme:light;--ground:#f5f5f7;--surface:#fff;--raised:#ececf0;--text:#1d1d1f;--muted:#5f6066;--faint:#6e6e73;--border:#dedee3;--control:#b8b8c0;--primary:#0066cc;--primary-fill:#0071e3;--on-primary:#fff;--focus:#0071e3;--board-bg:#e9e9ed;--board-grid:#aaaab3;--board-star:#7b7b85;--board-accent:#0066cc;--board-hover:#0066cc14;--stone-black:#18181b;--stone-edge:#74747e;--gap:24px;--radius:24px;--frame:1280px;font-family:Inter,'Malgun Gothic','Apple SD Gothic Neo',system-ui,sans-serif;font-size:16px;font-weight:400;line-height:1.5;color:var(--text);background:var(--ground);font-synthesis:none}
:root[data-theme=dark]{color-scheme:dark;--ground:#0b0b0d;--surface:#18181b;--raised:#26262b;--text:#f5f5f7;--muted:#b8b8c0;--faint:#a1a1aa;--border:#35353c;--control:#64646e;--primary:#5aa9ff;--primary-fill:#0071e3;--focus:#5aa9ff;--board-bg:#27272c;--board-grid:#62626e;--board-star:#9999a4;--board-accent:#5aa9ff;--board-hover:#ffffff14;--stone-edge:#94949f}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,select{font:inherit;color:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;touch-action:manipulation}button:disabled{cursor:default}button,select,input{min-height:44px}button,a,select,input,summary{outline-offset:4px}a:focus-visible,button:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--focus)}[hidden]{display:none!important}h1,h2,h3,p{margin:0}h1,h2,h3,strong{font-weight:600}h1{font-size:32px;line-height:1.2;letter-spacing:-.035em}h2{font-size:20px;line-height:1.35;letter-spacing:-.025em}h3{font-size:17px}p{overflow-wrap:anywhere}svg{display:block}button svg{pointer-events:none}.icon{width:20px;height:20px;flex:none}.quiet{font-size:13px;color:var(--muted);line-height:1.6}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}.skip-link{position:fixed;z-index:50;top:8px;left:16px;transform:translateY(-180%);padding:12px 20px;border-radius:8px;color:var(--on-primary);background:var(--primary-fill)}.skip-link:focus{transform:translateY(0)}
.app-shell{min-width:0}.topbar{min-height:72px;max-width:var(--frame);margin-inline:auto;padding:12px 32px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:10px;flex:none;font-size:20px;font-weight:600;letter-spacing:-.035em;white-space:nowrap;min-height:44px}.brand-mark{width:30px;height:30px;flex:none}.desktop-navigation{margin-left:24px;margin-right:auto}.desktop-navigation nav{display:flex;align-items:center;gap:24px}.nav-link{display:flex;align-items:center;gap:8px;min-height:44px;padding:8px 0;font-size:14px;color:var(--muted);white-space:nowrap}.nav-link[aria-current]{color:var(--text);font-weight:600}.nav-link:hover{color:var(--primary)}.desktop-navigation .icon,.desktop-navigation .nav-stones{display:none}.nav-stones{position:relative;display:inline-block;width:18px;height:18px;flex:none}.nav-stones i{position:absolute;top:0;left:0;width:11px;height:11px;background:#18181b;border:1px solid #858590;border-radius:50%}.nav-stones i+i{top:7px;left:7px;background:#fff}.topbar-actions{display:flex;align-items:center;gap:12px;flex:none}.theme-button,.menu-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;border:0;background:transparent;padding:8px 10px;border-radius:999px;color:var(--text);font-size:13px;white-space:nowrap}.theme-button:hover,.menu-button:hover{background:var(--raised)}.theme-sun{display:none}:root[data-theme=dark] .theme-sun{display:block}:root[data-theme=dark] .theme-moon{display:none}.menu-button{display:none;width:44px;padding:10px}.mobile-menu{max-width:var(--frame);margin-inline:auto;padding:12px 32px 24px;border-bottom:1px solid var(--border)}.mobile-menu nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 24px}.mobile-menu .nav-link{padding:10px 0}.mobile-menu .icon{width:18px;height:18px}
.language-switcher{position:relative;z-index:20;flex:none}.language-switcher>summary{display:flex;align-items:center;gap:8px;min-height:44px;padding:8px 12px;border:0;border-radius:999px;background:transparent;cursor:pointer;list-style:none;font-size:14px;color:var(--text);white-space:nowrap}.language-switcher>summary::-webkit-details-marker{display:none}.language-switcher>summary:hover{background:var(--raised)}.language-switcher>summary .icon{width:18px;height:18px}.language-chevron{font-size:16px;line-height:1}.language-switcher>nav{position:absolute;right:0;top:calc(100% + 8px);width:192px;padding:8px;background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:0 8px 28px #0002}.language-switcher>nav>a{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:44px;padding:10px 12px;border-radius:8px;font-size:14px}.language-switcher>nav>a:hover,.language-switcher>nav>a:focus-visible,.language-switcher>nav>a[aria-current]{background:var(--raised)}.language-switcher>nav>a[aria-current]{font-weight:600}
main{max-width:var(--frame);padding:28px 32px 0;margin-inline:auto;min-height:calc(100svh - 280px);outline:none}.page-title{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:28px}.page-title p{font-size:17px;color:var(--muted);margin-top:12px;line-height:1.6}.page-title>.quiet{max-width:30ch;text-align:right}.panel{padding:24px;border-radius:var(--radius);background:var(--surface);min-width:0}.panel h2{margin-bottom:16px}.home-grid{display:block}.catalogue{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gap)}.game-card{display:flex;flex-direction:column;min-width:0;align-items:stretch;padding:24px 28px 28px;background:var(--surface);border-radius:var(--radius)}.game-card-content{min-height:112px}.card-title{display:flex;align-items:center;justify-content:space-between;gap:16px}.card-title h2{font-size:28px;letter-spacing:-.035em;line-height:1.2}.game-card-content p{font-size:17px;margin:8px 0;color:var(--text);line-height:1.5}.game-meta{font-size:13px;color:var(--faint);font-variant-numeric:tabular-nums;white-space:normal}.favorite-button{display:grid;place-items:center;width:44px;height:44px;padding:12px;flex:none;background:transparent;border:0;border-radius:50%;color:var(--muted)}.favorite-button:hover{background:var(--raised);color:var(--text)}.favorite-button[aria-pressed=true] .icon{fill:var(--text);color:var(--text)}.game-art{display:grid;place-items:center;min-width:0;padding:16px 0 24px}.game-art svg{width:min(100%,280px);height:auto;border-radius:12px;transition:transform .18s ease}.game-art:hover svg{transform:scale(1.025)}.card-actions{display:flex;align-items:center;justify-content:center;gap:24px;margin-top:auto;min-height:44px}.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:10px 20px;border:1px solid var(--control);border-radius:999px;background:transparent;font-size:14px;font-weight:400;line-height:1.5;text-align:center;white-space:normal;transition:transform .12s,background .12s}.button:hover{background:var(--raised)}.button:active{transform:scale(.97)}.button.primary{background:var(--primary-fill);border-color:var(--primary-fill);color:var(--on-primary)}.button.primary:hover{background:#0066cc;border-color:#0066cc}button:disabled{color:var(--faint);border-color:var(--border);background:var(--raised)}button:disabled:hover{background:var(--raised)}.card-guide,.text-link,.guide-links a,.quick-rule a,.storage-note a{color:var(--primary)}.card-guide{display:inline-flex;align-items:center;min-height:44px;font-size:14px}.card-guide:hover,.text-link:hover,.guide-links a:hover,.quick-rule a:hover,.storage-note a:hover{text-decoration:underline;text-underline-offset:4px}.card-play{padding-inline:24px;min-width:124px}.home-shelf{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gap);margin-top:24px;align-items:start}.home-shelf .panel{min-height:120px}.home-shelf h2{font-size:17px;margin-bottom:14px}.empty{font-size:15px;color:var(--muted);line-height:1.7}.shelf-game{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;font-size:16px}.shelf-game small{display:block;color:var(--muted);font-size:13px;margin-top:4px}.shelf-game:hover{color:var(--primary)}.shelf-game+.shelf-game{border-top:1px solid var(--border)}.storage-note{grid-column:1/-1;display:grid;grid-template-columns:220px minmax(0,1fr) auto;gap:24px;align-items:center;padding:8px 0}.storage-note h2{margin:0}.storage-note p{font-size:14px;line-height:1.7;color:var(--muted)}.storage-note a{display:inline-flex;align-items:center;gap:8px;min-height:44px;font-size:14px}.storage-note .icon{width:16px;height:16px}.home-guide{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start;margin-top:44px;padding-top:28px;border-top:1px solid var(--border)}.home-guide h2{font-size:20px;margin-bottom:12px}.home-guide p{font-size:17px;color:var(--muted);max-width:64ch;line-height:1.7}.guide-links{display:grid;gap:8px}.guide-links a{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px;font-size:14px}
.back-link{display:inline-flex;align-items:center;gap:6px;min-height:28px;font-size:13px;color:var(--muted);margin-bottom:10px}.back-link .icon{width:16px;height:16px}.back-link:hover{color:var(--primary)}.game-heading{align-items:flex-end;margin-bottom:24px}.game-heading h1{font-size:32px}.game-heading p{font-size:14px;margin-top:8px}.heading-actions{display:flex;align-items:center;gap:16px}.text-link{display:inline-flex;align-items:center;min-height:44px;font-size:14px}.play-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:var(--gap);align-items:start}.play-panel{display:grid;grid-template-columns:1fr;align-items:center;gap:16px;padding:24px}.play-panel>*{grid-column:1/-1}.turn-row{display:flex;align-items:center;justify-content:space-between;gap:12px;min-width:0}.turn-identity{display:flex;align-items:center;gap:12px;min-width:0}.disc{display:inline-block;flex:none;width:26px;height:26px;border-radius:50%}.disc.black{background:var(--stone-black);border:1px solid var(--stone-edge)}.disc.white{background:#fff;border:1px solid var(--stone-edge)}.disc.draw{background:var(--faint)}.turn-row h2{font-size:20px;letter-spacing:-.025em;margin:0;line-height:1.3}.turn-row p{font-size:13px;color:var(--muted);margin-top:5px;line-height:1.6;max-width:36ch}.turn-row>.game-meta{white-space:nowrap;flex:none}.game-controls{display:flex;flex-wrap:wrap;align-items:center;gap:10px}.game-controls .button{padding:9px 16px}.sound-toggle{font-size:13px}.save-status{margin-left:auto;font-size:12px;color:var(--faint)}.board{position:relative;display:grid;grid-template-rows:repeat(var(--size),1fr);width:min(100%,640px,calc(100svh - 310px));aspect-ratio:1;margin-inline:auto;background:var(--board-bg);isolation:isolate;user-select:none;-webkit-user-select:none;border-radius:8px}.board-lines{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;color:var(--board-grid);z-index:-1}.board-row{display:grid;grid-template-columns:repeat(var(--size),minmax(0,1fr));min-height:0}.cell{position:relative;display:grid;place-items:center;min-height:0;min-width:0;width:100%;height:100%;border:0;border-radius:0;padding:0;margin:0;background:transparent;cursor:crosshair;z-index:0}.cell[aria-disabled=true]{cursor:default}.cell:focus-visible{outline:2px solid var(--focus);outline-offset:-2px;background:var(--board-hover);z-index:2}.cell:not([aria-disabled=true]):hover{background:var(--board-hover)}.stone{display:none;width:82%;height:82%;border-radius:50%;pointer-events:none}.has-black .stone{display:block;background:var(--stone-black);border:1px solid var(--stone-edge)}.has-white .stone{display:block;background:#fff;border:1px solid var(--stone-edge)}.move-dot{position:absolute;display:none;inset:44%;background:var(--board-accent);border-radius:50%;pointer-events:none}.last-move .move-dot{display:block;inset:33%;border:2px solid var(--board-accent);background:transparent;border-radius:2px}.reversi .cell{border-right:1px solid var(--board-grid);border-bottom:1px solid var(--board-grid)}.reversi .board-row:first-of-type .cell{border-top:1px solid var(--board-grid)}.reversi .board-row .cell:first-child{border-left:1px solid var(--board-grid)}.reversi .stone{width:78%;height:78%}.reversi .cell.legal .move-dot{display:block;inset:44%;border:0;border-radius:50%;background:var(--board-accent)}.board-bottom{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:8px 20px;font-size:12px;color:var(--muted)}.last-legend{display:flex;align-items:center;gap:6px;flex-wrap:wrap;font-size:12px}.last-legend i{display:inline-block;width:8px;height:8px;border:2px solid var(--board-accent);border-radius:1px;flex:none}.game-event{font-size:14px;color:var(--muted);line-height:1.7}.game-event:empty{display:none}.play-sidebar{display:grid;gap:var(--gap)}.settings-panel{padding:22px}.settings-panel h2{font-size:20px}.settings-panel label{display:block;font-size:13px;margin:14px 0 7px;line-height:1.5}.settings-panel form>label:first-child{margin-top:0}select,input[name=totalTime]{display:block;width:100%;min-width:0;border:1px solid var(--control);border-radius:10px;padding:9px 12px;background:var(--surface);font-size:16px;line-height:1.4;color:var(--text)}.settings-panel .quiet{font-size:12px;margin-top:10px;line-height:1.65}.time-settings{grid-column:1/-1;border-top:1px solid var(--border);border-bottom:1px solid var(--border);margin-top:16px}.time-settings>summary{cursor:pointer;min-height:44px;padding:12px 0;font-size:14px}.time-settings-fields{padding-bottom:14px}.time-settings-fields>.timing-label:first-child{margin-top:0}.settings-apply{width:100%;margin-top:18px;border-color:var(--control)}#total-time-fields{margin-top:14px}input[name=totalTime]{font-variant-numeric:tabular-nums}input[aria-invalid=true]{outline:2px solid var(--focus)}.time-input-error{font-size:13px;line-height:1.7;margin-top:8px}.score-panel{padding:22px}.score-panel h2{font-size:17px}.score-row{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px}.score-row>span{display:flex;align-items:center;gap:10px;min-width:0}.score-row .disc{width:20px;height:20px}.score-row strong{font-size:24px;min-width:40px;text-align:right;font-variant-numeric:tabular-nums}.owner{font-size:12px;color:var(--muted);margin-left:3px}.score-panel .quiet{margin-top:12px}.quick-rule{padding:0 4px}.quick-rule h2{font-size:17px;margin-bottom:12px}.quick-rule p{font-size:14px;line-height:1.75;color:var(--muted)}.quick-rule a{display:inline-flex;align-items:center;gap:8px;min-height:44px;font-size:14px;margin-top:8px}.quick-rule .icon{width:16px;height:16px}
.error-message,.storage-warning,.noscript-message{padding:16px 20px;border-radius:12px;background:var(--raised);color:var(--text);font-size:14px;line-height:1.7}.storage-warning,.noscript-message{margin-top:24px}.editorial{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:36px 48px;margin-top:48px;padding-top:36px;border-top:1px solid var(--border);scroll-margin-top:24px}.editorial-heading{grid-column:1/-1;max-width:82ch}.editorial-heading h2{font-size:28px;margin-bottom:14px}.editorial-heading p{font-size:17px;line-height:1.75;color:var(--muted)}.article-section{min-width:0}.article-section h2{font-size:20px;line-height:1.45;letter-spacing:-.025em;margin-bottom:14px}.article-section p,.article-section li{font-size:17px;line-height:1.8;overflow-wrap:anywhere}.article-section p+p{margin-top:14px}.article-section ul{padding-left:22px;margin:14px 0 0}.article-section li+li{margin-top:8px}.article-section .button{margin-top:18px}.info-editorial{margin-top:0;padding-top:8px;border-top:0}.contact-email{font-size:17px;text-decoration:underline;text-underline-offset:4px;overflow-wrap:anywhere}.not-found{padding-block:64px}.not-found p{font-size:17px;color:var(--muted);margin:20px 0 28px}footer{max-width:var(--frame);margin:44px auto 0;padding:28px 32px 32px;display:flex;align-items:center;justify-content:space-between;gap:20px 32px;flex-wrap:wrap;border-top:1px solid var(--border)}.footer-brand{font-size:20px;font-weight:600;letter-spacing:-.035em}footer nav{display:flex;align-items:center;gap:28px;flex-wrap:wrap}footer nav a{display:inline-flex;align-items:center;min-height:44px;font-size:14px;color:var(--muted)}footer nav a:hover{color:var(--primary)}footer p{width:100%;font-size:12px;color:var(--faint)}
@media(min-width:1600px){:root{--frame:1400px}.board{width:min(100%,680px,calc(100svh - 310px))}.game-art svg{width:300px}}
@media(max-width:1150px){.desktop-navigation{margin-left:8px}.desktop-navigation nav{gap:18px}.theme-button-label{display:none}.theme-button{width:44px;padding:10px}.play-layout{grid-template-columns:minmax(0,1fr) 296px}.play-panel{grid-template-columns:1fr}.board{width:min(100%,620px)}}
@media(max-width:1000px){.desktop-navigation{display:none}.menu-button{display:inline-flex}.topbar{min-height:64px;padding-inline:24px}.mobile-menu{padding-inline:24px}main{padding:24px 24px 0}.play-layout{grid-template-columns:1fr}.play-panel{display:grid;grid-template-columns:minmax(0,1fr) auto}.board{width:min(100%,620px)}.play-sidebar{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start}.settings-panel{grid-row:span 2}.quick-rule{grid-column:2}.storage-note{grid-template-columns:180px minmax(0,1fr);gap:16px 24px}.storage-note a{grid-column:2}.home-guide{grid-template-columns:minmax(0,1fr) 280px;gap:32px}footer{padding-inline:24px}}
@media(max-width:760px){.topbar{padding-inline:20px;gap:12px}.brand{font-size:18px;gap:8px}.brand-mark{width:26px;height:26px}.topbar-actions{gap:6px}.language-switcher>summary{padding-inline:10px;gap:6px}.theme-button{padding:10px}.mobile-menu{padding-inline:20px}main{padding:24px 20px 0}.page-title{align-items:flex-start;gap:16px}.page-title>.quiet{display:none}.game-card{padding:22px}.game-art svg{width:min(100%,250px)}.game-art{padding-top:8px}.game-card-content{min-height:122px}.card-title h2{font-size:26px}.card-actions{gap:16px}.card-play{min-width:0;padding-inline:20px}.storage-note{grid-template-columns:1fr;gap:10px}.storage-note a{grid-column:auto}.home-guide{grid-template-columns:1fr;gap:20px}.play-panel{grid-template-columns:1fr;padding:20px}.board{width:100%;max-width:600px}.save-status{width:100%;margin-left:0}.play-sidebar{grid-template-columns:1fr}.settings-panel{grid-row:auto}.score-panel{order:-1}.quick-rule{grid-column:auto;padding-inline:4px}.score-panel .score-row{display:inline-flex;width:49%;padding-right:12px}.score-panel .score-row .owner{display:none}.editorial{gap:28px}.info-editorial{grid-template-columns:1fr}.article-section p,.article-section li{font-size:16px}.info-editorial .article-section{max-width:80ch}footer{padding-inline:20px}}
@media(max-width:600px){.topbar{min-height:64px;padding:10px 16px;gap:8px}.brand{font-size:17px;gap:7px}.brand-mark{width:24px;height:24px}.topbar-actions{gap:2px}.theme-button,.menu-button{width:40px;min-height:44px;padding:10px}.language-switcher>summary{font-size:13px;padding:8px;gap:5px}.language-switcher>summary .icon{width:16px;height:16px}.language-switcher>nav{width:180px}.mobile-menu{padding:8px 16px 20px}.mobile-menu nav{gap:8px 16px}.nav-link{font-size:14px}main{padding:22px 16px 0}h1{font-size:28px}.page-title{margin-bottom:24px}.page-title p{font-size:16px;line-height:1.7;margin-top:10px}.catalogue{grid-template-columns:1fr;gap:20px}.game-card{padding:20px 22px 24px;border-radius:20px}.game-card-content{min-height:0}.card-title h2{font-size:28px}.game-card-content p{font-size:17px;margin:8px 0}.game-meta{font-size:13px}.game-art{padding:22px 0}.game-art svg{width:min(100%,260px)}.card-actions{justify-content:flex-start;gap:24px}.card-play{min-width:124px}.home-shelf{grid-template-columns:1fr;gap:16px;margin-top:20px}.home-shelf .panel{min-height:0;padding:22px}.storage-note{grid-column:auto;padding:6px}.empty{font-size:15px}.home-guide{padding-top:24px;margin-top:28px}.home-guide p{font-size:16px}.guide-links a{font-size:14px}.game-heading{display:block;position:relative}.game-heading h1{font-size:28px}.game-heading p{font-size:13px;line-height:1.7;margin-top:8px}.heading-actions{margin-top:12px;justify-content:space-between;gap:12px}.heading-actions .favorite-button{margin-right:0}.back-link{margin-bottom:8px}.play-layout{gap:20px}.play-panel{display:block;padding:16px 12px;border-radius:16px}.turn-row{margin-bottom:14px;gap:8px}.turn-identity{gap:9px}.turn-row .disc{width:22px;height:22px}.turn-row h2{font-size:18px}.turn-row p{font-size:12px;line-height:1.65}.turn-row>.game-meta{font-size:12px}.game-controls{margin-bottom:18px;gap:8px}.game-controls .button{padding:9px 14px;font-size:14px}.game-controls .sound-toggle{font-size:12px;padding-inline:12px}.save-status{font-size:12px}.board{width:100%;max-width:none;border-radius:6px}.board-bottom{margin-top:14px;display:block;font-size:12px}.last-legend{margin-top:6px;font-size:12px}.game-event{font-size:13px;margin-top:12px}.error-message{margin-top:14px}.score-panel{padding:20px}.score-panel .score-row{display:flex;width:100%;padding-right:0}.score-panel .score-row .owner{display:inline}.score-panel h2{font-size:17px}.score-panel .quiet{font-size:13px}.settings-panel{padding:22px}.settings-panel h2{font-size:20px}.settings-panel form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:12px}.settings-panel form>label:first-child{grid-column:1;grid-row:1;margin-top:0}.settings-panel #opponent{grid-column:1;grid-row:2}.settings-panel #cpu-settings{display:contents}.settings-panel #cpu-settings label:first-child{grid-column:2;grid-row:1;margin-top:0}.settings-panel #my-color{grid-column:2;grid-row:2}.settings-panel label[for=difficulty],.settings-panel #difficulty,.settings-panel form>p,.settings-panel .timing-label,.settings-panel #timing-mode,.settings-panel #timing-pace,.settings-panel #total-time-fields,.settings-panel .settings-apply{grid-column:1/-1}.settings-panel:has(#cpu-settings[hidden]) form>label:first-child,.settings-panel:has(#cpu-settings[hidden]) #opponent{grid-column:1/-1}.settings-panel .timing-label{margin-top:16px}.settings-panel label{font-size:13px}.settings-panel .quiet{font-size:12px}.quick-rule h2{font-size:17px}.quick-rule p{font-size:15px}.editorial{grid-template-columns:1fr;margin-top:32px;padding-top:28px;gap:28px}.editorial-heading h2{font-size:24px}.editorial-heading p{font-size:16px}.article-section h2{font-size:20px}.article-section p,.article-section li{font-size:16px;line-height:1.8}.info-editorial{margin-top:0;padding-top:0}.contact-email{font-size:16px}footer{padding:24px 16px 28px;margin-top:32px;gap:12px}.footer-brand{width:100%}footer nav{gap:10px 22px}footer nav a{font-size:14px}footer p{font-size:12px;margin-top:4px}.not-found{padding-block:40px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}.game-art:hover svg,.button:active{transform:none}}

/* One reading path: essentials, board examples, restrictions, strategy, details. */
.game-guide{max-width:900px;margin:56px auto 0;padding-top:36px;border-top:1px solid var(--border);scroll-margin-top:24px}.guide-heading h2{font-size:28px;line-height:1.35;margin-bottom:12px}.guide-heading p{max-width:64ch;font-size:17px;color:var(--muted);line-height:1.75}.guide-nav{position:sticky;flex-wrap:wrap;top:0;z-index:4;display:flex;gap:6px;overflow-x:auto;padding:10px 0;margin-top:20px;background:var(--ground);border-bottom:1px solid var(--border);scrollbar-width:thin}.guide-nav a{flex:none;display:flex;align-items:center;min-height:44px;padding:8px 12px;font-size:14px;line-height:1.5;border-radius:8px}.guide-nav a:hover{background:var(--raised);color:var(--primary)}.guide-nav a:focus-visible,.guide-details>summary:focus-visible{outline:2px solid var(--focus);outline-offset:-2px}.guide-section{padding:36px 0;border-bottom:1px solid var(--border);scroll-margin-top:90px}.guide-section>h2,.guide-next h2{font-size:24px;line-height:1.4;margin-bottom:20px;letter-spacing:-.03em}.guide-section h3{font-size:20px;line-height:1.5;letter-spacing:-.025em;margin-bottom:12px}.guide-section p{font-size:17px;line-height:1.8;max-width:70ch}.guide-section .guide-lead{color:var(--muted);margin-bottom:24px}.guide-basics{padding-left:26px;max-width:72ch}.guide-basics li{padding-left:8px;margin-bottom:22px}.guide-basics li:last-child{margin-bottom:8px}.guide-basics li::marker,.strategy-lessons>li::marker{font-weight:600;color:var(--muted)}.guide-basics strong{font-size:19px;font-weight:600;line-height:1.6}.guide-basics p{margin-top:6px;color:var(--muted)}.game-guide .text-link{margin-top:10px}.diagram-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin:24px 0 14px;align-items:start}.game-guide figure{min-width:0;margin:0}.guide-diagram{display:block;width:100%;height:auto}.game-guide figcaption{font-size:14px;color:var(--muted);text-align:center;margin-top:10px;line-height:1.6}.diagram-grid{fill:none;stroke:var(--board-grid);stroke-width:1}.diagram-lines{fill:none;stroke:var(--board-accent);stroke-width:4;opacity:.55;stroke-linecap:round}.diagram-stone{stroke:var(--stone-edge);stroke-width:1}.diagram-black{fill:var(--stone-black)}.diagram-white{fill:#fff}.diagram-choice{fill:none;stroke:var(--board-accent);stroke-width:2.4}.diagram-letter{fill:var(--board-accent);font-size:12px;font-weight:600;text-anchor:middle}.diagram-letter.on-stone{fill:#fff}.diagram-points{fill:var(--board-bg);stroke:var(--board-accent);stroke-width:2}.guide-section .guide-caption{font-size:13px;line-height:1.7;color:var(--muted);margin-top:12px}.open-three-lesson{padding:24px;background:var(--surface);border-radius:16px}.open-three-lesson .diagram-pair{gap:20px;margin-block:20px}.illustrated-rule{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:32px;align-items:center;padding:32px 0;border-bottom:1px solid var(--border)}.illustrated-rule:last-of-type{border-bottom:0;padding-bottom:24px}.guide-copy p{color:var(--muted)}.guide-copy .diagram-verdict{font-size:13px;line-height:1.6;font-weight:600;color:var(--text);margin-bottom:8px}.guide-section .guide-note{font-size:14px;line-height:1.8;padding:18px 20px;background:var(--surface);border-radius:12px}.strategy-lessons{padding-left:26px}.strategy-lessons>li{padding-left:8px;padding-block:24px;border-bottom:1px solid var(--border)}.strategy-lessons>li:first-child{padding-top:0}.strategy-lessons>li:last-child{border-bottom:0;padding-bottom:0}.strategy-lesson{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:32px;align-items:center}.strategy-lesson figure{max-width:280px}.guide-details{margin-top:20px;border-top:1px solid var(--border)}.guide-details>summary{min-height:48px;cursor:pointer;padding:12px 4px;font-size:15px;line-height:1.6;font-weight:500}.guide-details>summary::marker{color:var(--muted)}.guide-details[open]>summary{color:var(--primary)}.guide-detail-body{padding:12px 4px 20px;max-width:72ch}.guide-detail-section+.guide-detail-section{margin-top:28px}.guide-detail-section h3,.guide-detail-section h4{font-size:17px;font-weight:600;line-height:1.65;margin-bottom:12px}.guide-detail-section p,.guide-detail-section li{font-size:16px;line-height:1.85;color:var(--muted)}.guide-detail-section ul{margin-top:12px;padding-left:22px}.guide-detail-section p+p{margin-top:12px}.guide-faq .guide-details{margin-top:0}.guide-faq .guide-details:first-of-type{border-top:0}.guide-next{padding-top:32px}.guide-next p{color:var(--muted);font-size:16px;line-height:1.8}.guide-next .button{margin-top:16px}#play{scroll-margin-top:24px}
@media(max-width:760px){.game-guide{margin-top:36px;padding-top:28px}.guide-heading h2{font-size:25px}.guide-section{padding-block:28px}.guide-section>h2,.guide-next h2{font-size:22px}.guide-nav a{font-size:14px;padding-inline:10px}.illustrated-rule{grid-template-columns:minmax(0,1fr) 240px;gap:24px}.strategy-lesson{grid-template-columns:minmax(0,1fr) 200px;gap:24px}.guide-section p{font-size:16px}.guide-basics strong{font-size:18px}.open-three-lesson{padding:20px}}
@media(max-width:600px){.guide-heading h2{font-size:24px}.guide-heading p{font-size:16px}.guide-section>h2,.guide-next h2{font-size:22px}.guide-section h3{font-size:19px}.diagram-pair{grid-template-columns:1fr;gap:20px}.open-three-lesson .diagram-pair{grid-template-columns:1fr}.illustrated-rule,.strategy-lesson{grid-template-columns:1fr;gap:20px;align-items:start}.illustrated-rule figure,.strategy-lesson figure{width:100%;max-width:300px;margin-inline:auto}.illustrated-rule{padding-block:28px}.open-three-lesson{padding:18px}.guide-nav{margin-top:16px;gap:2px}.guide-nav a{padding-inline:8px;font-size:13px}.guide-section{scroll-margin-top:132px}.guide-basics,.strategy-lessons{padding-left:22px}.strategy-lessons>li{padding-left:4px}.guide-detail-section h3,.guide-detail-section h4{font-size:16px}.guide-detail-section p,.guide-detail-section li{font-size:16px}.guide-section .guide-note{padding:16px}.game-guide .guide-caption{font-size:13px}}

/* Fixed Black/White sides: layout changes never alter the clock engine. */
.play-panel>.game-clock{display:grid;grid-column:1/-1;gap:8px;min-width:0;width:min(100%,640px,calc(100svh - 310px));margin:0 auto;padding:0;background:transparent;border-radius:0}.clock-faces{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.clock-side{--clock-ink:#1d1d1f;--clock-muted:#5f6066;--clock-active:#005bb5;--clock-danger:#a51d2d;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px 16px;align-items:center;min-width:0;padding:14px 16px;background:#fff;color:var(--clock-ink);border:1px solid #b8b8c0;border-radius:12px;font-variant-numeric:tabular-nums}.clock-side-black{--clock-ink:#f5f5f7;--clock-muted:#b8b8c0;--clock-active:#8ac2ff;--clock-danger:#ff9ba2;background:#1d1d1f;border-color:#64646e}.clock-side[data-active=true]{outline:2px solid var(--clock-active);outline-offset:-3px}.clock-side-heading{grid-column:1;grid-row:1;display:flex;align-items:center;gap:10px;min-width:0;flex-wrap:wrap}.clock-side-heading h3{display:flex;align-items:center;gap:7px;font-size:16px;font-weight:600;line-height:1.4;white-space:nowrap}.clock-side-heading .disc{width:18px;height:18px;border-color:#94949f}.clock-side-heading>[data-clock-owner]{font-size:12px;line-height:1.5;color:var(--clock-muted);overflow-wrap:anywhere}.clock-state{grid-column:1;grid-row:2;font-size:12px;line-height:1.6;color:var(--clock-muted)}.clock-side[data-active=true] .clock-state{color:var(--clock-active);font-weight:600}.clock-value{grid-column:2;grid-row:1;font-size:32px;line-height:1.2;font-weight:600;text-align:right;white-space:nowrap;letter-spacing:-.035em}.clock-value-label{grid-column:2;grid-row:2;font-size:12px;line-height:1.6;text-align:right;color:var(--clock-muted)}.clock-move-row{grid-column:1/-1;display:flex;justify-content:space-between;align-items:center;gap:12px;padding-top:6px;border-top:1px solid #94949f;font-size:12px;color:var(--clock-muted);line-height:1.6}.clock-move-row output{font-size:16px;font-weight:600;color:var(--clock-ink)}.clock-side.clock-urgent .clock-value{color:var(--clock-danger)}.game-clock>p{font-size:12px;color:var(--muted);line-height:1.6}.guide-copy .diagram-verdict{display:flex;align-items:center;gap:8px}.verdict-symbol{display:block;width:26px;height:26px;flex:none;stroke-linecap:round}.guide-copy .diagram-verdict.is-forbidden{color:#b4232a}.guide-copy .diagram-verdict.is-allowed{color:#166534}:root[data-theme=dark] .guide-copy .diagram-verdict.is-forbidden{color:#ff9da4}:root[data-theme=dark] .guide-copy .diagram-verdict.is-allowed{color:#77dc9b}
@media(max-width:600px){.play-panel>.game-clock{margin-bottom:16px}.clock-faces{gap:10px}.clock-side{grid-template-columns:1fr;gap:4px;padding:12px 10px}.clock-side-heading{grid-column:1;grid-row:1;gap:4px 8px;justify-content:space-between}.clock-side-heading h3{font-size:14px;gap:6px}.clock-side-heading .disc{width:16px;height:16px}.clock-state{grid-column:1;grid-row:2}.clock-value{grid-column:1;grid-row:3;font-size:28px;text-align:left;margin-top:4px}.clock-value-label{grid-column:1;grid-row:4;text-align:left}.clock-move-row{grid-row:5;gap:6px;flex-wrap:wrap}.clock-move-row output{font-size:15px}.clock-side-heading>[data-clock-owner]{font-size:12px}.verdict-symbol{width:28px;height:28px}}

@media(max-width:1150px){.play-panel>.game-clock{width:min(100%,620px)}}
@media(max-width:760px){.play-panel>.game-clock{width:100%;max-width:600px}}
@media(max-width:600px){.play-panel>.game-clock{max-width:none}}

.online-lobby{grid-column:1/-1;min-width:0;margin-top:18px;padding-top:18px;border-top:1px solid var(--border)}.online-lobby h3{font-size:18px;line-height:1.5;margin-bottom:8px}.online-lobby #online-status{font-size:14px;line-height:1.8;margin-top:14px}.online-lobby .button{width:100%;margin-top:10px;line-height:1.6}.online-actions{display:grid;gap:0}.online-lobby input{display:block;width:100%;min-width:0;min-height:44px;padding:9px 12px;border:1px solid var(--control);border-radius:10px;background:var(--surface);color:var(--text);font:inherit;font-size:16px}#online-code{text-transform:uppercase;letter-spacing:.08em}#online-link{font-size:13px;letter-spacing:0}.online-error{font-size:13px;line-height:1.8;padding:12px;margin-top:12px;border-radius:10px;background:var(--raised)}#online-countdown{display:block;font-size:13px;color:var(--muted);line-height:1.7;margin-top:8px}#online-invite{margin-top:16px}body[data-online=true] #mode-help{display:none}