*{box-sizing:border-box}body{margin:0;background:#f5f2e8;color:#243b35;font:16px/1.5 system-ui,-apple-system,sans-serif}header{max-width:1160px;margin:auto;padding:22px 24px;display:flex;align-items:center;justify-content:space-between;gap:12px}header>div{display:flex;gap:8px}.brand{font-size:24px;font-weight:900;text-decoration:none;color:#244d40}.brand span{color:#ce7951}button,select,input,a.button{font:inherit;border:1px solid #ced4c7;border-radius:13px;padding:11px 16px;min-height:48px;background:#fffef9;color:inherit}button,a.button{cursor:pointer;font-weight:650}button:hover,a.button:hover{background:#e9efdf}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #c35d28;outline-offset:3px}button:disabled{opacity:.48;cursor:default}.primary{background:#285c48;color:white;border-color:#285c48}.primary:hover{background:#36765c}a{color:#285c48}main{max-width:1120px;margin:auto;padding:12px 24px 50px}.intro{margin:18px 0 28px}.eyebrow{font-size:12px;font-weight:800;letter-spacing:.18em;color:#8b6845}h1{font-size:clamp(28px,4vw,44px);letter-spacing:-.035em;margin:6px 0}h2{font-size:23px;margin:0 0 10px}.intro p:last-child{color:#627168;margin-top:8px}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card,.panel,details{background:#fffdf6;border:1px solid #dedfcf;border-radius:22px;padding:24px;box-shadow:0 5px 20px #293d2610}.card{display:flex;flex-direction:column;align-items:flex-start;gap:10px}.card p{margin:0;color:#677164}.card button{margin-top:auto}.icon{font-size:38px}.join{margin:22px 0;display:flex;flex-wrap:wrap;gap:10px}.join input{flex:1;min-width:170px}.muted{font-size:13px;color:#687367}.toggle{display:flex;gap:8px;align-items:flex-start;font-size:14px}.toggle input{min-height:20px;width:20px;flex-shrink:0}.table-layout{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(260px,1fr);gap:24px;align-items:start}.board-wrap{padding:18px;background:#dcb475;border-radius:24px;box-shadow:0 12px 36px #68461c20}.board{position:relative;display:grid;grid-template-columns:repeat(9,1fr);aspect-ratio:1;background:#dfb97f;isolation:isolate}.board svg{position:absolute;inset:0;width:100%;height:100%;z-index:-1}.point{padding:0;min-height:0;aspect-ratio:1;border:0;background:transparent;border-radius:0;position:relative;touch-action:manipulation}.point:hover{background:#ffffff22}.point:disabled{opacity:1}.stone{display:block;position:absolute;inset:6%;border-radius:50%;box-shadow:1px 3px 4px #0004}.stone.black{background:radial-gradient(circle at 34% 27%,#555,#151915 68%)}.stone.white{background:radial-gradient(circle at 34% 27%,#fff,#eee8d8 80%);border:1px solid #b5ab92}.stone.selected{opacity:.55;outline:3px dashed #b65020}.stone.dead{opacity:.35}.stone.dead:after{content:'×';position:absolute;inset:0;display:grid;place-items:center;color:#d1491c;font-size:24px;font-weight:bold}.last:after{content:'';position:absolute;inset:38%;border:2px solid #dc8545;border-radius:50%;z-index:1}.players{display:flex;justify-content:space-between;gap:8px;margin-bottom:14px}.player{border:1px solid #d6d9c9;border-radius:16px;padding:12px;flex:1;background:#fffdf6;min-width:0}.player.active{border:2px solid #35634c;padding:11px}.player strong,.player small{display:block;overflow-wrap:anywhere}.clock{font:700 24px ui-monospace,monospace}.actions{display:flex;flex-wrap:wrap;gap:9px;margin:16px 0}.actions button{flex:1}.status{font-size:13px;color:#617260;margin:12px 0}.room-code{font:12px ui-monospace,monospace;overflow-wrap:anywhere;user-select:all}.result{padding:16px;background:#e7efdc;border-radius:14px;font-size:21px;font-weight:700}.panel hr{border:0;border-top:1px solid #e0e0d5;margin:20px 0}details{margin-top:22px}summary{cursor:pointer;font-weight:700;min-height:30px}.history{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}#notice:empty{display:none}#notice{border-left:4px solid #c8813b;background:#fff4da;padding:12px 16px;border-radius:8px}footer{text-align:center;padding:20px;color:#6b756a}input[type=range]{padding:0;width:100%;min-height:44px}select{max-width:100%}.danger{color:#a14b37}.button{text-decoration:none;display:inline-block}.preview-note{min-height:24px;margin:8px 0;color:#5d634c}@media(max-width:760px){.cards{grid-template-columns:1fr}.table-layout{grid-template-columns:1fr;gap:18px}.intro{margin:8px 0 20px}.card{padding:20px}.card button{width:100%}main{padding:8px 14px 30px}header{padding:16px 14px}.brand{font-size:21px}header button{font-size:13px;padding:8px}.board-wrap{padding:12px;border-radius:18px}.panel{padding:20px}.intro p:last-child{font-size:14px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}
/* AuthManager's shared modal normally uses the curriculum's utility CSS.
   Scope its standalone layout here so the chess room needs no global stylesheet. */
#auth-modal{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;background:#172920eF;padding:16px}#auth-modal.hidden,#auth-modal .hidden{display:none!important}#auth-modal section{width:min(100%,460px);padding:24px;border-radius:24px;background:#fffdf6;color:#243b35}#auth-modal h1{font-size:27px}#auth-modal .grid{display:grid;gap:10px;margin-top:18px}#auth-turnstile{display:flex;justify-content:center;margin-top:16px}#auth-error{padding:10px;color:#a03d29}#auth-modal p{font-size:14px}#auth-modal button{width:100%}
 .game-settings{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:22px}.game-settings label{display:flex;flex-direction:column;gap:6px}.game-config{font-weight:700;color:#315a45}.board-scroll{overflow:auto;max-height:85vh;overscroll-behavior:contain;border-radius:20px}.board-large{min-width:872px}.zoom-control{display:flex;align-items:center;gap:10px;margin-bottom:6px}.stone.seki{outline:3px solid #167dbe;outline-offset:-3px}.table-layout>section{min-width:0}