:root{font-family:Arial,Helvetica,sans-serif;color:#202923;background:#e8eee8;font-synthesis:none;text-rendering:optimizeLegibility;--ink: #202923;--muted: #56635a;--red: #a32e25;--green: #176444;--paper: #f7f5ec;--line: rgba(32, 41, 35, .22);--mono: Arial, Helvetica, sans-serif}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background-color:#e8eee8;background-image:repeating-linear-gradient(0deg,rgba(47,75,57,.025) 0,rgba(47,75,57,.025) 1px,transparent 1px,transparent 5px),linear-gradient(118deg,rgba(255,255,255,.72),transparent 48%,rgba(133,168,139,.14))}button,input{font:inherit}button{cursor:pointer}.app-shell{width:min(1480px,100%);min-height:100vh;margin:0 auto;padding:0 42px}.topbar{height:76px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none}.brand-stamp{width:34px;height:34px;display:grid;place-items:center;background:var(--red);color:#fff2d7;font-family:var(--mono);font-size:13px;font-weight:500;transform:rotate(-3deg)}.brand-name{font-size:11px;font-weight:500;letter-spacing:1.5px}.brand-name b{font-weight:800}.connection-state{display:flex;align-items:center;gap:9px;color:var(--muted);font:10px var(--mono)}.connection-dot,.status-mark{width:8px;height:8px;border-radius:50%;background:#b27a4b}.connection-state.is-connected .connection-dot,.status-mark.is-live{background:#3c8a68;box-shadow:0 0 0 4px #3c8a6821}.arena{padding:32px 0 38px}.intro-row{display:flex;align-items:end;justify-content:space-between;margin-bottom:22px}.eyebrow,.match-code span,.section-heading>span,.share-row>span,.turn-readout>span,.notation-foot span,.footer-line,.player-meta>span,.skill-control>div>span{font:10px var(--mono);letter-spacing:1px;color:var(--muted)}.eyebrow{margin:0 0 8px;color:var(--red)}.eyebrow span{margin-left:10px;color:#9b9485}h1{margin:0;font-family:Arial,Helvetica,sans-serif;font-size:35px;line-height:1.08;font-weight:700}h1 em{color:var(--red);font-weight:400}.match-code{display:grid;gap:4px;text-align:right}.match-code strong{font:15px var(--mono);letter-spacing:2px}.play-layout{display:grid;grid-template-columns:minmax(0,min(55svh,920px)) minmax(265px,330px);gap:32px;align-items:start;justify-content:center}.board-column{min-width:0;display:flex;flex-direction:column}.mobile-tab-bar,.mobile-control-backdrop{display:none}.board-column.is-black-view .black-player{order:3;border-top:0;border-bottom:1px solid var(--line)}.board-column.is-black-view .board-frame{order:2}.board-column.is-black-view .red-player{order:1;border-top:1px solid var(--line);border-bottom:0}.board-frame{width:100%;aspect-ratio:900 / 990;overflow:hidden;background:#d9c7a2;border:1px solid rgba(59,50,37,.25);box-shadow:0 10px 30px #322b201f}.board-frame canvas{display:block;width:100%!important;height:100%!important;touch-action:manipulation}.player-bar{min-height:55px;display:flex;align-items:center;gap:11px;padding:7px 12px;background:#ffffff47;border:1px solid var(--line)}.black-player{border-bottom:0}.red-player{border-top:0}.player-emblem{width:30px;height:30px;display:grid;place-items:center;border:1px solid currentColor;border-radius:50%;font:12px var(--mono)}.black-player .player-emblem{color:#373a36;background:#d8d1bf}.red-player .player-emblem{color:var(--red);background:#f1ddd0}.player-meta{display:grid;gap:2px}.player-meta strong{font-size:10px;letter-spacing:.8px}.player-meta>span{font-size:9px}.clock{margin-left:auto;font:17px var(--mono);font-variant-numeric:tabular-nums}.control-rail{padding:0 0 0 22px;border-left:1px solid var(--line)}.control-section{padding:4px 0 22px;border-bottom:1px solid var(--line)}.control-section+.control-section{padding-top:21px}.section-heading{display:flex;align-items:baseline;gap:10px;margin-bottom:16px}.section-heading>span{color:var(--red);font-size:9px}.section-heading h2{margin:0;font-family:Arial,Helvetica,sans-serif;font-size:19px;font-weight:700}.button{height:42px;border:0;font:10px var(--mono);letter-spacing:.8px;transition:transform .18s,background .18s}.button:hover{transform:translateY(-1px)}.button-primary{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;background:var(--green);color:#f7f1e6}.button-primary:hover{background:#2e594a}.button-symbol{font:20px Arial,Helvetica,sans-serif;line-height:1}.join-row{display:grid;grid-template-columns:1fr 72px;gap:7px;margin-top:8px}.join-row input{min-width:0;height:40px;padding:0 11px;border:1px solid var(--line);border-radius:0;outline:none;background:#ffffff57;font:11px var(--mono);letter-spacing:1px}.join-row input:focus{border-color:var(--green)}.join-row input::placeholder{color:#9b998f}.button-dark{background:var(--ink);color:#f5f0e5}.button-dark:hover{background:#3c4540}.share-row{display:flex;align-items:center;justify-content:space-between;margin:18px 0 4px}.share-row>span{font-size:9px}.icon-button{width:28px;height:25px;border:1px solid var(--line);background:transparent;color:var(--ink);font-size:16px}.share-code{font:21px var(--mono);letter-spacing:3px;color:var(--red)}.status-line{display:flex;align-items:center;gap:10px}.status-line strong{font:10px var(--mono);letter-spacing:.25px}.status-detail{min-height:34px;margin:8px 0 15px 18px;color:var(--muted);font-size:11px;line-height:1.55}.turn-readout{display:flex;align-items:center;justify-content:space-between;padding:11px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.turn-readout strong{font:11px var(--mono)}.turn-readout strong[data-color=red]{color:var(--red)}.turn-readout strong[data-color=black]{color:var(--ink)}.skill-control{display:flex;align-items:center;justify-content:space-between;padding-top:16px}.skill-control>div{display:grid;gap:4px}.skill-control>div>strong{font-size:10px;letter-spacing:.8px}.skill-control>div>span{font-size:9px}.switch{position:relative;width:43px;height:24px;display:block}.switch input{position:absolute;opacity:0}.switch-track{position:absolute;top:0;right:0;bottom:0;left:0;border:1px solid #aaa493;background:#d4cebf;transition:background .2s;cursor:pointer}.switch-track:after{position:absolute;top:3px;left:3px;width:16px;height:16px;background:#f7f1e5;content:"";transition:transform .2s}.switch input:checked+.switch-track{background:var(--red);border-color:var(--red)}.switch input:checked+.switch-track:after{transform:translate(19px)}.switch input:focus-visible+.switch-track{outline:2px solid var(--green);outline-offset:2px}.last-action{min-height:34px;margin:0;color:var(--red);font:12px var(--mono)}.notation-foot{display:flex;gap:8px;align-items:baseline;margin-top:16px}.notation-foot span{font-size:8px}.notation-foot strong{margin-right:auto;font:10px var(--mono)}.notation-foot strong:last-child{margin:0}.notice{position:fixed;z-index:30;bottom:max(12px,env(safe-area-inset-bottom));left:50%;width:min(420px,calc(100% - 28px));min-height:0;margin:0;padding:9px 10px;border-left:2px solid var(--red);background:var(--paper);color:var(--red);font-size:11px;opacity:0;visibility:hidden;pointer-events:none;transform:translate(-50%,8px);transition:opacity .2s,transform .2s,visibility .2s}.notice.is-visible{opacity:1;visibility:visible;transform:translate(-50%)}.footer-line{display:flex;justify-content:space-between;padding:14px 0 20px;border-top:1px solid var(--line);font-size:9px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:980px){.app-shell{padding:0 24px}.play-layout{grid-template-columns:minmax(0,1fr) 270px;gap:22px}.board-column{width:min(100%,55svh);justify-self:end}.control-rail{padding-left:16px}}@media(max-width:720px){.app-shell{padding:0 10px}.topbar{height:62px}.brand-name{font-size:9px;letter-spacing:.8px}.connection-state{font-size:8px}.arena{padding:10px 0 12px}.intro-row,.footer-line{display:none}.play-layout{grid-template-columns:minmax(0,1fr);gap:0}.board-column{width:min(100%,50svh);justify-self:center}.control-rail{position:fixed;z-index:52;right:10px;bottom:calc(70px + env(safe-area-inset-bottom));left:10px;display:none;max-height:min(58dvh,440px);overflow-y:auto;padding:0 14px;border:1px solid var(--line);background:var(--paper);box-shadow:0 12px 32px #141e183d}.control-rail.is-open{display:block}.control-section{display:none;padding:14px 0 18px;border:0}.control-rail[data-active-tab=room] .room-section,.control-rail[data-active-tab=status] .match-section,.control-rail[data-active-tab=action] .notation-section{display:block}.control-section+.control-section{padding-top:14px}.mobile-control-backdrop:not([hidden]){position:fixed;z-index:51;top:0;right:0;bottom:0;left:0;display:block;width:100%;height:100%;padding:0;border:0;background:#121c1657}.mobile-tab-bar{position:fixed;z-index:53;right:0;bottom:0;left:0;display:grid;grid-template-columns:repeat(3,1fr);min-height:calc(58px + env(safe-area-inset-bottom));padding:0 12px env(safe-area-inset-bottom);border-top:1px solid var(--line);background:var(--paper);box-shadow:0 -5px 20px #141e181f}.mobile-tab-bar button{position:relative;border:0;border-right:1px solid var(--line);background:transparent;color:var(--muted);font:10px var(--mono)}.mobile-tab-bar button:last-child{border-right:0}.mobile-tab-bar button[aria-selected=true]{color:var(--green);font-weight:700}.mobile-tab-bar button[aria-selected=true]:before{position:absolute;top:0;right:18px;left:18px;height:3px;background:var(--green);content:""}}@media(max-width:430px){.app-shell{padding:0 9px}.brand-stamp{width:29px;height:29px}.brand{gap:8px}.connection-state{gap:5px}.control-rail{right:8px;left:8px}.board-frame{max-height:80vh}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}