:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}body{margin:0}#root{box-sizing:border-box;flex-direction:column;width:100%;min-height:100svh;margin:0;display:flex}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 8px;font-size:15px;line-height:135%}.menu{flex:1;justify-content:center;align-items:center;padding:24px;display:flex}.menu-card{background:var(--panel);border:1px solid var(--border);text-align:center;border-radius:12px;min-width:360px;padding:40px 48px}.menu-title{margin:0 0 8px;font-size:2rem;font-weight:700}.menu-subtitle{color:var(--muted);margin:0 0 28px;font-size:.95rem}.menu-actions{flex-direction:column;gap:12px;display:flex}.menu-btn{background:var(--panel);color:var(--text);border:1px solid var(--border);cursor:pointer;border-radius:8px;padding:10px 18px;font-size:.95rem;transition:border-color .15s,background .15s}.menu-btn:hover:not(:disabled){border-color:var(--accent)}.menu-btn:disabled{opacity:.5;cursor:not-allowed}.menu-btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.menu-btn.primary:hover:not(:disabled){filter:brightness(1.1)}.menu-btn.small{flex-shrink:0;padding:6px 12px;font-size:.85rem}.modal-backdrop{z-index:100;background:#0000008c;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal{background:var(--panel);border:1px solid var(--border);border-radius:12px;min-width:360px;max-width:440px;padding:28px 32px}.modal-title{margin:0 0 6px;font-size:1.3rem}.modal-subtitle{color:var(--muted);margin:0 0 20px;font-size:.9rem}.session-id-row{background:var(--bg);border:1px solid var(--border);border-radius:8px;align-items:center;gap:10px;min-width:0;margin-bottom:24px;padding:10px 12px;display:flex}.session-id{overflow-wrap:anywhere;letter-spacing:.04em;-webkit-user-select:all;user-select:all;flex:1;min-width:0;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:1.05rem}.session-input{background:var(--bg);width:100%;color:var(--text);border:1px solid var(--border);border-radius:8px;outline:none;margin-bottom:20px;padding:10px 12px;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:1rem}.session-input:focus{border-color:var(--accent)}.modal-actions{justify-content:flex-end;gap:10px;display:flex}.modal-error{color:#ff6b6b;margin:-8px 0 16px;font-size:.85rem}.color-choices{grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:20px;display:grid}.color-choice{background:var(--bg);color:var(--text);border:1px solid var(--border);cursor:pointer;border-radius:8px;flex-direction:column;align-items:center;gap:8px;padding:16px 8px;font-size:.95rem;transition:border-color .15s,background .15s;display:flex}.color-choice:hover:not(:disabled){border-color:var(--accent)}.color-choice:disabled{opacity:.5;cursor:not-allowed}.color-king{justify-content:center;align-items:center;height:40px;font-size:2.4rem;line-height:1;display:inline-flex}.color-king.white{color:#f1f1f1}.color-king.black{color:#1c1c1c;text-shadow:0 0 1px var(--muted)}.color-king.random{gap:2px;display:inline-flex}.color-king.random .king-w{color:#f1f1f1}.color-king.random .king-b{color:#1c1c1c;text-shadow:0 0 1px var(--muted)}.board-pane{flex-direction:column;flex:none;justify-content:center;align-items:center;gap:12px;display:flex}.board-row{flex-direction:row;align-items:stretch;gap:8px;display:flex}.board-wrap{aspect-ratio:1;width:min(78vh,100vw - 480px)}.turn{color:var(--muted);margin:0;font-size:.95rem}.avatar{-webkit-user-select:none;user-select:none;border-radius:50%;flex:0 0 28px;justify-content:center;align-items:center;width:28px;height:28px;font-size:18px;line-height:1;display:flex}.avatar-white{color:#1a1a1a;background:#f0f0f0}.avatar-black{color:#f0f0f0;background:#111;border:1px solid #444}.chat-pane{background:var(--panel);border:1px solid var(--border);border-radius:10px;flex-direction:column;flex:0 0 400px;height:calc(min(78vh,100vw - 480px) + 100px);display:flex;overflow:hidden}.chat-log{flex-direction:column;flex:1;gap:8px;padding:16px;display:flex;overflow-y:auto}.msg{align-items:flex-end;gap:8px;max-width:85%;display:flex}.msg-mine{justify-content:flex-end;align-self:flex-end}.msg-other,.msg-system{align-self:flex-start}.msg-text{border-radius:12px;padding:8px 12px;font-size:.9rem;line-height:1.35}.msg-white .msg-text{background:var(--accent);color:#fff}.msg-black .msg-text{color:var(--text);background:#444}.msg-mine .msg-text{border-bottom-right-radius:4px}.msg-other .msg-text{border-bottom-left-radius:4px}.msg-system .msg-text{color:var(--muted);background:0 0;padding:2px 4px;font-size:.8rem;font-style:italic}.msg-system.msg-mine{align-self:flex-end}.msg-system{flex-direction:column;gap:4px;max-width:90%}.msg-system .msg-row{align-items:center;gap:6px;display:flex}.msg-system.msg-mine .msg-row{justify-content:flex-end}.explain-btn{border:1px solid var(--border);width:16px;height:16px;color:var(--muted);cursor:pointer;background:0 0;border-radius:50%;justify-content:center;align-items:center;padding:0;font-size:.65rem;font-weight:700;line-height:1;display:inline-flex}.explain-btn:hover{color:var(--text);border-color:var(--accent)}.explain-btn[aria-expanded=true]{background:var(--accent);color:#fff;border-color:var(--accent)}.explain-card{background:var(--panel);border:1px solid var(--border);color:var(--text);border-radius:8px;flex-direction:column;gap:4px;max-width:280px;padding:8px 10px;font-size:.75rem;font-style:normal;line-height:1.4;display:flex}.explain-card strong{color:var(--accent);font-weight:600}.msg-system.msg-mine .explain-card{align-self:flex-end}.chat-input{border-top:1px solid var(--border);background:#1f1f1f;gap:8px;padding:12px;display:flex}.chat-input input{background:var(--bg);border:1px solid var(--border);color:var(--text);border-radius:6px;outline:none;flex:1;padding:8px 12px;font-size:.9rem}.chat-input input:focus{border-color:var(--accent)}.chat-input input:disabled{opacity:.55;cursor:not-allowed}.chat-input button:disabled{opacity:.5;cursor:not-allowed}.chat-thinking-sub{color:var(--muted);align-items:center;gap:4px;padding:2px 4px;font-size:.72rem;font-style:italic;display:flex}.chat-thinking-sub-error,.chat-thinking-sub-error .thinking-text{color:#ff5c5c}.chat-typing{border-radius:12px 12px 12px 4px;align-items:center;gap:5px;width:fit-content;padding:10px 14px;display:flex}.chat-typing[data-side=black]{background:#444}.chat-typing[data-side=white]{background:var(--accent)}.chat-typing .thinking-dot{background:#ddd}.thinking-dot{background:var(--muted);border-radius:50%;width:6px;height:6px;animation:1.2s ease-in-out infinite thinking-pulse;display:inline-block}.thinking-dot:nth-child(2){animation-delay:.15s}.thinking-dot:nth-child(3){animation-delay:.3s}.thinking-text{margin-right:2px}@keyframes thinking-pulse{0%,80%,to{opacity:.3;transform:scale(.85)}40%{opacity:1;transform:scale(1.15)}}.chat-input button{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:6px;padding:8px 16px;font-size:.9rem;font-weight:500}.chat-input button:hover{opacity:.9}.eval-bar{border:1px solid var(--border);background:var(--panel);border-radius:4px;flex-direction:column;flex:none;width:32px;display:flex;position:relative;overflow:hidden}.eval-bar[data-orientation=black]{flex-direction:column-reverse}.eval-fill{width:100%;transition:height .2s}.eval-black{background:#1a1a1a}.eval-white{background:#f0f0f0}.eval-label{color:#fff;pointer-events:none;white-space:nowrap;background:#0009;border-radius:2px;padding:1px 2px;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:.5rem;line-height:1;position:absolute;bottom:4px;left:50%;transform:translate(-50%)}.session-error{background:var(--panel);border:1px solid var(--border);text-align:center;border-radius:12px;flex-direction:column;align-items:center;gap:16px;max-width:420px;padding:32px 40px;display:flex}.session-error h2{margin:0;font-size:1.2rem}.session-error p{color:var(--muted);margin:0}.app{flex-direction:column;height:100vh;display:flex}.app-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:12px 24px;display:flex}.app-header h1{margin:0;font-size:1.25rem;font-weight:600}.reset-btn{background:var(--panel);color:var(--text);border:1px solid var(--border);cursor:pointer;border-radius:6px;padding:6px 12px;font-size:.9rem}.reset-btn:hover{border-color:var(--accent)}.header-right{align-items:center;gap:12px;display:flex}.session-tag{color:var(--muted);font-size:.85rem}.session-tag code{color:var(--text);font-family:ui-monospace,SF Mono,Menlo,monospace}.layout{flex:1;justify-content:center;align-items:center;gap:24px;min-height:0;padding:24px;display:flex}:root{--bg:#1a1a1a;--panel:#242424;--border:#333;--text:#ffffffde;--muted:#ffffff8c;--accent:#646cff}*{box-sizing:border-box}body,html,#root{background:var(--bg);height:100%;color:var(--text);margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif}
