:root{color-scheme:dark;font-family:Pretendard,Noto Sans KR,Apple SD Gothic Neo,system-ui,sans-serif;font-synthesis:none;--bg: #111518;--surface: #1a2024;--surface-strong: #242c31;--line: #354148;--text: #f4f1e8;--muted: #9ba7ad;--gold: #e5b43f;--green: #607f75;--ivory: #ddceb1;background:var(--bg);color:var(--text)}*{box-sizing:border-box;letter-spacing:0}html,body{width:100%;min-height:100%;margin:0;background:var(--bg)}button,a{-webkit-tap-highlight-color:transparent}button{border:0;color:inherit;font:inherit;cursor:pointer}button:disabled{cursor:not-allowed;opacity:.38}button:focus-visible,a:focus-visible,canvas:focus-visible{outline:3px solid #f4ca65;outline-offset:2px}.app-shell{min-height:100dvh;display:grid;grid-template-rows:68px minmax(0,1fr)}.topbar{display:grid;grid-template-columns:minmax(170px,1fr) auto minmax(170px,1fr);align-items:center;gap:20px;min-width:0;padding:0 24px;border-bottom:1px solid #2c363c;background:#151a1d}.brand{display:inline-flex;align-items:center;gap:10px;width:max-content;color:var(--text);text-decoration:none}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border:2px solid var(--gold);border-radius:4px;color:#ffe4a1;background:#332b1b;font-family:"DejaVu Serif",serif;font-size:25px}.brand>span:last-child{display:grid}.brand strong{font-size:17px;line-height:1.05}.brand small{margin-top:3px;color:var(--muted);font-size:9px;font-weight:750}.mode-switch{display:grid;grid-template-columns:repeat(2,minmax(104px,1fr));padding:3px;border:1px solid #354149;border-radius:6px;background:#101417}.mode-button{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:38px;padding:0 14px;border-radius:4px;background:transparent;color:var(--muted);font-size:13px;font-weight:750}.mode-button.is-active{background:#2b3439;color:#fff;box-shadow:inset 0 0 0 1px #4a575e}.mode-button svg,.icon-button svg,.primary-button svg,.secondary-button svg,.thinking-indicator svg{width:17px;height:17px;stroke-width:2}.top-actions{display:flex;justify-content:flex-end;gap:8px}.icon-button{display:grid;place-items:center;width:38px;height:38px;border:1px solid #3b474e;border-radius:5px;background:#20272b}.icon-button:not(:disabled):hover{background:#2d373c}.game-layout{display:grid;grid-template-columns:minmax(430px,1fr) 310px;min-height:0}.play-area{display:grid;grid-template-rows:48px minmax(0,1fr) 48px;place-items:center;min-width:0;min-height:0;padding:12px 28px;background:#111619}.player-row{display:flex;align-items:center;justify-content:space-between;width:min(100%,650px);min-width:0;padding:0 2px}.player-row.is-turn .player-identity strong{color:#fff4ce}.player-row:not(.is-turn){opacity:.72}.player-identity{display:flex;align-items:center;gap:9px;min-width:0}.player-identity>span:last-child{display:grid;min-width:0}.player-identity strong{overflow:hidden;font-size:13px;text-overflow:ellipsis;white-space:nowrap}.player-identity small{margin-top:1px;color:var(--muted);font-size:10px}.side-token{display:grid;place-items:center;width:32px;height:32px;border:1px solid #59676e;border-radius:4px;font-family:"DejaVu Serif",serif;font-size:23px}.side-token--white{color:#fff8e8;background:#586c66;text-shadow:0 1px #17211e}.side-token--black{color:#11191d;background:#d5c39e;text-shadow:0 1px #fff8}.captured-list{display:flex;justify-content:flex-end;gap:2px;min-width:0;color:var(--muted);font-family:"DejaVu Serif",serif;font-size:18px}.captured-piece{display:inline-flex;align-items:center;min-width:18px;height:25px}.captured-piece small{margin-left:-2px;color:#b6c0c5;font-family:inherit;font-size:9px}.captured-empty{color:#748188;font-family:inherit;font-size:10px}.board-frame{position:relative;grid-row:2;width:min(100%,650px);max-height:100%;aspect-ratio:1;overflow:hidden;border:7px solid #4c3e29;border-radius:4px;background:var(--ivory);box-shadow:0 18px 44px #0009}#chess-board{display:block;width:100%;height:100%;touch-action:manipulation;cursor:pointer}.thinking-indicator{position:absolute;top:12px;left:50%;display:flex;align-items:center;gap:7px;min-height:34px;padding:0 12px;border:1px solid #7a898f;border-radius:5px;background:#192226f2;color:#f7f3e9;font-size:12px;font-weight:750;opacity:0;pointer-events:none;transform:translate(-50%,-8px);transition:.15s ease}.thinking-indicator.is-visible{opacity:1;transform:translate(-50%)}.control-rail{display:flex;flex-direction:column;min-width:0;min-height:0;border-left:1px solid #313b41;background:var(--surface)}.control-rail section{padding:19px 20px;border-bottom:1px solid #303a40}.section-label{margin:0 0 12px;color:#8f9ba2;font-size:10px;font-weight:850;text-transform:uppercase}.turn-status{display:grid;grid-template-columns:35px minmax(0,1fr) auto;align-items:center;gap:10px}.turn-status>div{display:grid}.turn-status strong{font-size:18px}.turn-status div span{margin-top:2px;color:var(--muted);font-size:11px}.turn-piece{display:grid;place-items:center;width:32px;height:32px;border-radius:4px;font-family:"DejaVu Serif",serif;font-size:25px}.turn-piece--white{color:#fff9e9;background:#59726a}.turn-piece--black{color:#11191d;background:#d5c39e}.check-badge{padding:4px 7px;border:1px solid #e36a5f;border-radius:4px;background:#3c211f;color:#ff978e;font-size:10px;font-weight:900}.match-stats{display:grid;grid-template-columns:repeat(3,1fr);margin-top:17px;border-top:1px solid #303a40;border-bottom:1px solid #303a40}.match-stats span{padding:8px 4px;color:var(--muted);font-size:11px;text-align:center}.match-stats span+span{border-left:1px solid #303a40}.match-stats b{color:var(--text)}.control-label{display:block;margin:13px 0 7px;color:#c6ced2;font-size:11px;font-weight:700}.option-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}.option-grid--three{grid-template-columns:repeat(3,minmax(0,1fr))}.option-grid button{min-width:0;min-height:36px;padding:0 8px;overflow:hidden;border:1px solid #3b474e;border-radius:4px;background:#20272b;color:var(--muted);font-size:11px;font-weight:750;text-overflow:ellipsis;white-space:nowrap}.option-grid button.is-selected{border-color:#c99d42;background:#392f1e;color:#ffdc85}.side-option span{margin-right:5px;font-family:"DejaVu Serif",serif;font-size:17px}.side-option--white.is-selected{border-color:#95b7aa;background:#263a35;color:#e8fff6}.side-option--black.is-selected{border-color:#cdbb94;background:#3b3427;color:#fff0cb}.moves-section{display:flex;flex:1;flex-direction:column;min-height:120px;overflow:hidden}.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:8px}.section-heading span{color:#75838a;font-size:9px}.move-list{flex:1;min-height:0;margin:0;padding:0;overflow:auto;list-style:none;scrollbar-color:#4a565d transparent}.move-list li:not(.move-empty){display:grid;grid-template-columns:27px 34px 1fr;align-items:center;min-height:28px;border-bottom:1px solid #293238;color:#d5dbde;font-size:11px}.move-number{color:#718087;font-variant-numeric:tabular-nums}.move-color{font-family:"DejaVu Serif",serif;font-size:17px}.move-color--w{color:#f4ead1}.move-color--b{color:#87979e}.move-empty{padding:19px 0;color:#6f7c83;font-size:11px;text-align:center}.rail-actions{display:grid;grid-template-columns:minmax(0,.72fr) minmax(0,1.28fr);gap:8px;padding:15px 20px 19px}.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-width:0;min-height:42px;padding:0 12px;border-radius:5px;font-size:12px;font-weight:800}.primary-button{background:var(--gold);color:#251d0d}.primary-button:hover{background:#f0c55b}.secondary-button{border:1px solid #46535a;background:#242d32;color:#d7dddf}.result-dialog,.promotion-dialog{width:min(90vw,400px);padding:28px;border:1px solid #4a575e;border-radius:7px;background:#1c2327;color:var(--text);text-align:center;box-shadow:0 28px 90px #000b}.result-dialog::backdrop,.promotion-dialog::backdrop{background:#080b0dd5}.result-piece{display:grid;place-items:center;width:68px;height:68px;margin:0 auto 19px;border:2px solid #e5c878;border-radius:6px;color:#fff8e8;background:#516a62;font-family:"DejaVu Serif",serif;font-size:47px}.result-piece--black{color:#131b1f;background:#d5c39e}.result-piece--draw{color:#dfe4e6;background:#364147}.result-dialog h2,.promotion-dialog h2{margin:0;font-size:24px}.result-dialog>p:not(.section-label){margin:9px 0 23px;color:var(--muted);font-size:13px}.dialog-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.promotion-dialog h2{margin-bottom:20px}.promotion-options{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px}.promotion-options button{display:grid;place-items:center;min-width:0;min-height:80px;border:1px solid #46535a;border-radius:5px;background:#252e33;color:#fff6df;font-family:"DejaVu Serif",serif;font-size:38px}.promotion-options button:hover{border-color:var(--gold);background:#39301f}.promotion-options span{margin-top:-8px;font-family:Pretendard,Noto Sans KR,sans-serif;font-size:10px}.dialog-cancel{width:100%;min-height:38px;margin-top:10px;border-radius:4px;background:transparent;color:var(--muted);font-size:12px}@media(max-width:800px){.app-shell{grid-template-rows:auto minmax(0,1fr)}.topbar{grid-template-columns:1fr auto;gap:10px;padding:10px 14px}.mode-switch{grid-column:1 / -1;grid-row:2;width:100%}.top-actions{grid-column:2;grid-row:1}.game-layout{display:block}.play-area{grid-template-rows:43px auto 43px;padding:8px 12px}.board-frame,.player-row{width:min(100%,540px)}.control-rail{border-top:1px solid #313b41;border-left:0}.moves-section{max-height:190px}}@media(max-width:430px){.brand-mark{width:34px;height:34px;font-size:22px}.brand small{display:none}.topbar{padding-inline:10px}.mode-button{min-height:36px}.play-area{padding-inline:8px}.board-frame{border-width:5px}.captured-list{max-width:55%;overflow:hidden}.control-rail section{padding:17px 16px}.rail-actions{padding-inline:16px}.promotion-dialog{padding:22px 16px}.promotion-options button{min-height:72px;font-size:34px}}@media(min-width:650px)and (max-height:540px){.app-shell{height:100dvh;min-height:0;grid-template-rows:48px minmax(0,1fr);overflow:hidden}.topbar{padding:0 14px}.brand-mark{width:30px;height:30px;font-size:19px}.brand small,.player-identity small{display:none}.mode-button,.icon-button{min-height:32px;height:32px}.game-layout{grid-template-columns:minmax(350px,1fr) 280px;height:100%}.play-area{grid-template-rows:28px minmax(0,1fr) 28px;padding:4px 14px}.side-token{width:24px;height:24px;font-size:17px}.board-frame{width:auto;height:100%}.control-rail section{padding:10px 15px}.status-section .section-label,.settings-section .section-label{display:none}.match-stats{margin-top:8px}.control-label{margin-top:7px}.option-grid button{min-height:30px}.moves-section{display:none!important}.rail-actions{margin-top:auto;padding:9px 15px 11px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}