:root{font-family: ui-sans-serif,system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:#253e35;background:#f5f2eb;font-synthesis:none;--green:#2e5945;--muted:#7c857c;--line:#e4e5da}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer;transition:background .18s,transform .18s}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible,a:focus-visible{outline:3px solid #b39152;outline-offset:3px}header{height:100px;max-width:1320px;padding:0 48px;display:flex;align-items:center;justify-content:space-between;margin:auto;border-bottom:1px solid var(--line)}a{color:inherit;text-decoration:none}.brand{display:flex;align-items:center;font-size:25px;font-weight:650;gap:12px}.brand-sub{font-size:10px;letter-spacing:3px;margin-left:6px;color:var(--muted)}.logo{font-size:30px;position:relative;letter-spacing:-9px;padding-right:12px}.logo i{font-style:normal;color:#9caa91}.header-note{font-size:13px;color:var(--muted)}.badge{font-size:12px;padding:7px 13px;background:#e7ece0;border-radius:30px;color:#4b6650}main{max-width:1224px;margin:0 auto;padding:50px 24px}.lobby{min-height:650px;display:grid;grid-template-columns:1.2fr 1fr;gap:100px;align-items:center}.eyebrow{display:block;font-size:10px;font-weight:650;letter-spacing:2.6px;color:#83917d}.intro{position:relative;padding:20px 28px}h1{font-family:ui-serif,"Songti SC",SimSun,serif;font-weight:500;font-size:64px;line-height:1.25;letter-spacing:2px;margin:24px 0}.intro p{font-size:17px;color:#7a847b;line-height:1.9}.features{display:flex;gap:20px;font-size:12px;color:#6e7c6d;margin-top:34px}.features span::before{content:'·';color:#a3926c;margin-right:7px}.mini-board{width:220px;height:154px;margin-top:44px;position:relative;background-image:linear-gradient(#b4bda54a 1px,transparent 1px),linear-gradient(90deg,#b4bda54a 1px,transparent 1px);background-size:30px 30px;mask-image:linear-gradient(130deg,black 40%,transparent)}.mini-stone{position:absolute;width:26px;height:26px;left:77px;top:47px;border-radius:50%;box-shadow:2px 3px 5px #0002}.b{background:radial-gradient(circle at 35% 30%,#555d53,#222a24 70%)}.w{background:radial-gradient(circle at 35% 30%,#fff,#edeae2 70%);border:1px solid #d7d4c9}.mini-stone.w{left:107px;top:77px}.mini-stone.two{left:47px;top:77px}.card{background:#fffef9;border:1px solid var(--line);border-radius:18px;box-shadow:0 4px 20px #263f3503}.entry{padding:38px 36px;max-width:440px;width:100%}h2{font-size:22px;font-weight:550;margin:16px 0 10px;letter-spacing:1px}.muted{color:var(--muted);font-size:13px;line-height:1.8}.entry label{display:block;font-size:12px;margin:24px 0 9px}.entry input{width:100%;border:1px solid #dddfd4;border-radius:9px;padding:13px 14px;background:#fbfbf5;color:#253e35;outline:none}.entry input:focus{border-color:#6a896c;box-shadow:0 0 0 3px #2e594512}.entry input::placeholder{color:#a0a599;font-size:13px}.primary,.secondary{border-radius:9px;min-height:43px;padding:11px 17px;font-size:13px;font-weight:550}.primary{background:var(--green);border:1px solid var(--green);color:#fffef6}.primary:hover:not(:disabled){background:#244935}.secondary{border:1px solid #d9ded1;color:#42604b;background:#f7f9f1}.secondary:hover:not(:disabled){background:#edf1e6}.entry button{width:100%;margin-top:14px}.entry .primary{display:flex;align-items:center;justify-content:space-between}.divider{display:flex;align-items:center;gap:12px;font-size:11px;color:#939b8d;margin-top:26px}.divider:before,.divider:after{content:'';height:1px;background:var(--line);flex:1}.entry #join-fields label{margin-top:19px}.small{font-size:11px;line-height:1.9}.entry .small{margin:22px 0 0}.game-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}.game-heading h1{font-family:inherit;font-size:30px;margin:10px 0 0;letter-spacing:0}.game-heading h1 span{font-size:12px;font-family:monospace;letter-spacing:1px;color:var(--muted);vertical-align:middle;margin-left:10px}.text-button{border:0;background:none;font-size:12px;color:#71806d;padding:10px}.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:26px;align-items:start}.board-panel{padding:24px}.board-top,.board-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12px}.board-top #status{font-size:15px;font-weight:550}.board-wrap{padding:28px 16px 24px}#board{display:grid;grid-template-columns:repeat(15,1fr);aspect-ratio:1;border-radius:6px;background-color:#dbc7a1;background-image:radial-gradient(ellipse at 40% 10%,#f5e5c75e,transparent),repeating-linear-gradient(5deg,transparent 0 10px,#94724306 11px 12px);box-shadow:inset 0 0 30px #92784d15,0 6px 18px #6e522112;padding:2.4%}.cell{border:0;background:linear-gradient(#6c603e66,#6c603e66) center/1px 100% no-repeat,linear-gradient(90deg,#6c603e66,#6c603e66) center/100% 1px no-repeat;position:relative;padding:0;aspect-ratio:1;width:100%;border-radius:0}.cell.top{background-size:1px 50%,100% 1px;background-position:center bottom,center}.cell.bottom{background-size:1px 50%,100% 1px;background-position:center top,center}.cell.left{background-image:linear-gradient(#6c603e66,#6c603e66),linear-gradient(90deg,#6c603e66,#6c603e66);background-size:1px 100%,50% 1px;background-position:center,right center}.cell.right{background-size:1px 100%,50% 1px;background-position:center,left center}.cell.top.left{background-size:1px 50%,50% 1px;background-position:center bottom,right center}.cell.top.right{background-size:1px 50%,50% 1px;background-position:center bottom,left center}.cell.bottom.left{background-size:1px 50%,50% 1px;background-position:center top,right center}.cell.bottom.right{background-size:1px 50%,50% 1px;background-position:center top,left center}.cell:disabled{opacity:1}.cell.star:before{content:'';position:absolute;left:44%;top:44%;width:12%;height:12%;border-radius:50%;background:#706140}.stone{position:absolute;inset:8%;border-radius:50%;box-shadow:1px 3px 4px #35281744;pointer-events:none}.stone.black{background:radial-gradient(circle at 32% 26%,#5b5d53,#242923 65%,#171c17)}.stone.white{background:radial-gradient(circle at 32% 26%,#fffefb,#e5e1d4 76%,#d4cfbf);border:1px solid #b5ab9522}.cell.last .stone:after{content:'';position:absolute;inset:37%;border:1.5px solid #ca9b4f;border-radius:50%}.cell:hover:not(:disabled):after{content:'';position:absolute;inset:17%;border-radius:50%;background:#2e59452b}.board-bottom{font-size:11px;color:var(--muted);padding:0 4px}.tiny-dot{display:inline-block;width:7px;height:7px;background:#354537;border-radius:50%;margin-right:5px}aside{display:flex;flex-direction:column;gap:18px}aside .card{padding:24px}.player{display:flex;gap:12px;align-items:center;padding:18px 0;border-bottom:1px solid #eeeee5}.player-stone{width:32px;height:32px;flex-shrink:0;border-radius:50%;box-shadow:0 2px 3px #0002}.player-name{font-size:14px;overflow-wrap:anywhere}.player-detail{font-size:11px;color:var(--muted);margin-top:5px}.player-me{font-size:10px;color:#8a967d;padding-left:5px}.online-dot{display:inline-block;width:5px;height:5px;border-radius:50%;background:#83a16a;margin-right:5px}.offline{background:#c5c5b9}.actions{display:flex;gap:10px;margin-top:20px}.actions button{flex:1}.section-title{display:flex;justify-content:space-between;align-items:center}.section-title h2{margin:0}.voice-icon{font-size:23px;color:#92a07d}.voice-card button,.invite-card .secondary{width:100%;margin-top:8px}.voice-card .small{margin-bottom:0}.invite-card h2{font-size:19px}.invite-card input{width:100%;padding:10px;margin-top:12px;font-size:11px}#notice{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);border:1px solid #cbd8bd;background:#fffef9;color:#354d3c;border-radius:12px;padding:14px 24px;box-shadow:0 8px 36px #0001;font-size:13px;max-width:90vw;z-index:10}footer{max-width:1224px;margin:30px auto 0;padding:28px 24px;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:11px;color:#929a8b}dialog{border:1px solid var(--line);border-radius:16px;padding:26px;max-width:360px;width:90%;background:#fffef9;color:#253e35}dialog::backdrop{background:#20362955}dialog h2{margin-top:0}[hidden]{display:none!important}@media(max-width:950px){.lobby{gap:36px;grid-template-columns:1fr 1fr}.intro{padding:0}h1{font-size:50px}.game-layout{grid-template-columns:minmax(0,1fr) 270px;gap:16px}.board-panel{padding:18px}.board-wrap{padding:25px 0}aside .card{padding:20px}}@media(max-width:720px){header{height:76px;padding:0 22px}.header-note{display:none}.brand-sub{display:none}main{padding:28px 16px}.lobby{display:flex;flex-direction:column;gap:30px;min-height:0}.intro{width:100%;padding:12px 14px}.intro h1{font-size:42px;margin:16px 0}.intro p{font-size:14px}.mini-board{position:absolute;width:130px;height:120px;right:0;top:55px;opacity:.55}.features{gap:16px;margin-top:22px}.entry{max-width:none;padding:28px 24px}.game-heading{margin-bottom:20px}.game-heading h1{font-size:24px}.game-heading h1 span{display:block;margin:6px 0 0;font-size:11px}.game-layout{display:flex;flex-direction:column}.board-panel{width:100%;padding:16px 12px}.board-top #status{font-size:13px}.board-wrap{padding:22px 0}.board-bottom{font-size:10px}aside{width:100%;display:grid;grid-template-columns:1fr 1fr;gap:12px}aside .card{padding:18px 16px}.invite-card{grid-column:1/-1}h2{font-size:18px}.player{gap:8px;padding:14px 0}.player-stone{width:25px;height:25px}.player-name{font-size:12px}.actions{gap:6px}.actions button{padding:10px 7px;font-size:12px}footer{margin-top:14px;padding:22px 16px}footer span:last-child{display:none}}@media(prefers-reduced-motion:reduce){button{transition:none}}

/* Previews synchronize separately from confirmed moves. */
.cell{touch-action:manipulation}
.preview-stone{opacity:.5;outline:2px dashed #386448;outline-offset:2px;box-shadow:none}
.cell:has(.preview-stone):hover:after{display:none}
.board-confirmation{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:40px;margin-bottom:8px;font-size:12px;color:#546c4e}
.board-confirmation .text-button{flex-shrink:0;color:#42604b;min-height:40px}
@media(max-width:720px){
  body.in-game header{height:52px;padding:0 max(12px,env(safe-area-inset-left)) 0 max(12px,env(safe-area-inset-right))}
  body.in-game .brand{font-size:21px}
  body.in-game main{padding:12px 0}
  .game-heading{margin:0 12px 12px}
  .game-heading .eyebrow{display:none}
  .game-heading h1{font-size:20px;margin:0}
  .game-heading h1 span{font-size:10px;margin-top:4px}
  .game-layout{gap:12px}
  .board-panel{padding:12px 0;border-left:0;border-right:0;border-radius:0}
  .board-top,.board-bottom,.board-confirmation{padding-left:12px;padding-right:12px}
  .board-wrap{padding:12px 0 6px}
  #board{padding:1%;border-radius:0}
  .board-confirmation{font-size:11px;min-height:42px;margin-bottom:4px}
  aside{padding:0 12px}
  .players-card{grid-column:1/-1}
  .players-card .eyebrow,.players-card h2{display:none}
  #players{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px}
  .player{min-width:0;padding:2px 0 12px}
  .player>div{min-width:0}
  .player-detail{line-height:1.6}
  .players-card .actions{margin-top:12px}
  .voice-card{grid-column:1/-1}
  .voice-card .muted{margin:8px 0}
  body.in-game footer{margin-top:0}
}

#board-surface{position:relative;width:100%;aspect-ratio:1}
#board{position:relative}
#win-overlay{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}
#winning-line{stroke:#d5a54d;stroke-width:.85;stroke-linecap:round;filter:drop-shadow(0 0 2px #fff5be);stroke-dasharray:1;stroke-dashoffset:0}
#winning-line.celebrate{animation:draw-victory .8s ease-out both}
.winning-stone{outline:2px solid #e3b756;outline-offset:2px;animation:stone-victory 1.2s ease-out calc(var(--win-index)*.12s) both}
#result-banner{display:flex;align-items:center;gap:14px;padding:16px 20px;background:#edf2df;border:1px solid #dce4c6;border-radius:12px;margin:4px 0 12px}
#result-banner.celebrate{animation:result-reveal .65s ease-out both}
.result-symbol{font-size:30px;color:#ba9040}
#result-title{font-size:18px;font-weight:600}
#result-copy{font-size:12px;color:#748264;line-height:1.6;margin:5px 0 0}
@keyframes draw-victory{from{stroke-dashoffset:1}to{stroke-dashoffset:0}}
@keyframes stone-victory{0%{transform:scale(1)}35%{transform:scale(1.18);box-shadow:0 0 18px #e3b756}100%{transform:scale(1);box-shadow:0 0 7px #e3b75688}}
@keyframes result-reveal{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:720px){#result-banner{margin:8px 12px;padding:12px 14px}#result-title{font-size:16px}}
@media(prefers-reduced-motion:reduce){#winning-line.celebrate,.winning-stone,#result-banner.celebrate{animation:none}}