.chess-timeline-page{--chess-page-wash:rgba(37, 90, 211, 0.12);background:radial-gradient(1000px 360px at 50% -6%,var(--chess-page-wash),transparent 60%),var(--bg);transition:background .28s}.chess-timeline-page[data-chess-theme=turochamp1951]{--chess-page-wash:rgba(164, 114, 44, 0.16)}.chess-timeline-page[data-chess-theme=machack1967]{--chess-page-wash:rgba(42, 133, 96, 0.14)}.chess-timeline-page[data-chess-theme=deepblue1997]{--chess-page-wash:rgba(37, 90, 211, 0.12)}.chess-timeline-page[data-chess-theme=modern2020s]{--chess-page-wash:rgba(41, 123, 107, 0.14)}.chess-lab{--chess-accent:#255ad3;--chess-accent-soft:rgba(37, 90, 211, 0.12);--chess-lab-bg:radial-gradient(120% 110% at 100% 0%, rgba(37, 90, 211, 0.12), transparent 44%),linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(247, 249, 255, 0.98));--chess-shell-bg:#f3f7ff;--chess-shell-border:#c6d5f0;--chess-light-square:#edf3ff;--chess-dark-square:#cadcf8;--chess-selected:#4f83ef;--chess-target:#8dcf6e;--chess-piece-white:#194f9e;--chess-piece-black:#7b1932;--chess-status-bg:linear-gradient(180deg, #eff5ff 0%, #e4efff 100%);--chess-status-fg:#18355c;--chess-note-bg:linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(242, 247, 255, 0.98));--chess-note-border:#d4e0f3;--chess-note-kicker:#58729b;--chess-note-title:#15355d;--chess-control-bg:#ffffff;--chess-control-fg:#1a4072;--chess-log-bg:#ffffff;--chess-log-border:#dde5f2;padding:.95rem;background:var(--chess-lab-bg);transition:background .24s,border-color .24s,box-shadow .24s}.chess-lab[data-model-theme=turochamp1951]{--chess-accent:#936126;--chess-accent-soft:rgba(147, 97, 38, 0.14);--chess-lab-bg:radial-gradient(120% 110% at 100% 0%, rgba(196, 152, 84, 0.18), transparent 40%),linear-gradient(180deg, rgba(255, 251, 243, 0.98), rgba(247, 239, 222, 0.98));--chess-shell-bg:#faf2df;--chess-shell-border:#d8c39d;--chess-light-square:#f7ead0;--chess-dark-square:#e2c18b;--chess-selected:#bb7a22;--chess-target:#87a84f;--chess-piece-white:#7b4d17;--chess-piece-black:#332316;--chess-status-bg:linear-gradient(180deg, #fff5e2 0%, #f7e8ca 100%);--chess-status-fg:#5c3d17;--chess-note-bg:linear-gradient(180deg, rgba(255, 250, 241, 0.98), rgba(248, 238, 218, 0.98));--chess-note-border:#dcc8a5;--chess-note-kicker:#7d6338;--chess-note-title:#5b4020;--chess-control-bg:#fffaf1;--chess-control-fg:#6a471d;--chess-log-bg:#fffaf2;--chess-log-border:#e4d7bf}.chess-lab[data-model-theme=machack1967]{--chess-accent:#1f7b58;--chess-accent-soft:rgba(31, 123, 88, 0.14);--chess-lab-bg:radial-gradient(120% 110% at 100% 0%, rgba(87, 188, 138, 0.16), transparent 42%),linear-gradient(180deg, rgba(247, 255, 250, 0.98), rgba(239, 248, 243, 0.98));--chess-shell-bg:#eef8f1;--chess-shell-border:#c4decf;--chess-light-square:#e4f3e9;--chess-dark-square:#b2d9c2;--chess-selected:#2f9770;--chess-target:#7bb55a;--chess-piece-white:#166a4c;--chess-piece-black:#20362a;--chess-status-bg:linear-gradient(180deg, #eefbf3 0%, #dbf3e4 100%);--chess-status-fg:#154634;--chess-note-bg:linear-gradient(180deg, rgba(250, 255, 252, 0.98), rgba(235, 247, 240, 0.98));--chess-note-border:#cae1d5;--chess-note-kicker:#4c7a68;--chess-note-title:#154634;--chess-control-bg:#f9fffb;--chess-control-fg:#15533c;--chess-log-bg:#fafffb;--chess-log-border:#d8e8df}.chess-lab[data-model-theme=deepblue1997]{--chess-accent:#255ad3;--chess-accent-soft:rgba(37, 90, 211, 0.12)}.chess-lab[data-model-theme=modern2020s]{--chess-accent:#217b71;--chess-accent-soft:rgba(33, 123, 113, 0.14);--chess-lab-bg:radial-gradient(120% 110% at 100% 0%, rgba(90, 184, 167, 0.17), transparent 42%),linear-gradient(180deg, rgba(247, 255, 254, 0.98), rgba(240, 248, 247, 0.98));--chess-shell-bg:#eef8f6;--chess-shell-border:#c8dfdb;--chess-light-square:#e7f1ef;--chess-dark-square:#c3dcd7;--chess-selected:#26998d;--chess-target:#82be68;--chess-piece-white:#0f665c;--chess-piece-black:#243039;--chess-status-bg:linear-gradient(180deg, #eefbf9 0%, #d8f0ec 100%);--chess-status-fg:#184943;--chess-note-bg:linear-gradient(180deg, rgba(250, 255, 254, 0.98), rgba(237, 247, 245, 0.98));--chess-note-border:#cee1de;--chess-note-kicker:#4e7872;--chess-note-title:#184943;--chess-control-bg:#fbfffe;--chess-control-fg:#18564f;--chess-log-bg:#fbfffe;--chess-log-border:#d7e6e4}.chess-board-wrap{border:1px solid var(--chess-shell-border);border-radius:18px;padding:.6rem;background:linear-gradient(180deg,rgba(255,255,255,.46),transparent 24%),var(--chess-shell-bg);box-shadow:inset 0 1px 0 rgba(255,255,255,.55);transition:background .24s,border-color .24s}.chess-board{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:.2rem}.chess-square{border:1px solid rgba(97,119,147,.2);border-radius:8px;aspect-ratio:1/1;font:700 1.24rem/1 "Segoe UI Symbol","Noto Sans Symbols",SFMono-Regular,Menlo,Consolas,monospace;cursor:pointer;padding:0;transition:transform .14s,box-shadow .14s,background .14s}.chess-square:hover:not(:disabled){transform:translateY(-1px)}.chess-square:disabled{cursor:default;color:#2d3e57}.chess-status{margin:0;border:1px solid var(--chess-shell-border);border-radius:16px;background:var(--chess-status-bg);color:var(--chess-status-fg);padding:.68rem .78rem;font-size:.92rem;font-weight:600;line-height:1.42}.chess-model-note{margin:0;display:grid;gap:.44rem;border:1px solid var(--chess-note-border);border-radius:16px;background:var(--chess-note-bg);color:var(--chess-status-fg);padding:.72rem .78rem;line-height:1.42;transition:background .24s,border-color .24s}.chess-log{margin:0;padding-left:1.15rem;border:1px solid var(--chess-log-border);border-radius:14px;background:var(--chess-log-bg);min-height:130px;max-height:180px;overflow:auto;display:grid;gap:.3rem;padding-top:.48rem;padding-bottom:.48rem;background:#232325;border-color:#3a3a3c}.chess-log li{font-size:.84rem;line-height:1.34}