:root{--color-bg:#f7f3ea;--color-text:#2b2b2b;--color-muted:#6b6457;--color-control-bg:#fff;--color-control-border:#c9c0ad;--color-accent:#2b2b2b;--color-accent-text:#fff;--color-focus:#1d76db;--board-surface:#dcb35c;--board-line:#3a2c12;--board-label:#5a4520;--stone-black:#1c1c1c;--stone-white:#f6f4ef;--stone-white-edge:#8a8170;--lp-danger:#c62828;--lp-warning:#b85000;--lp-badge-text:#fff;--highlight:#1565c0;--highlight-on-dark:#90caf9;--board-max:720px;--board-min:280px;color:var(--color-text);background:var(--color-bg);font-family:system-ui,-apple-system,Hiragino Sans,Noto Sans JP,sans-serif}@media (prefers-color-scheme:dark){:root{--color-bg:#1e1e1e;--color-text:#e8e8e8;--color-muted:#a8a294;--color-control-bg:#2a2a2a;--color-control-border:#4a4740;--color-accent:#e8e8e8;--color-accent-text:#1e1e1e;--color-focus:#6aa8ff}}*{box-sizing:border-box}body{background:var(--color-bg);margin:0;padding:16px}#app{flex-direction:column;min-height:calc(100dvh - 32px);display:flex}.app-header{width:min(100%, var(--board-max));flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px 24px;margin:0 auto 12px;display:flex}.app-header h1{margin:0;font-size:1.25rem}.controls{flex-wrap:wrap;gap:12px;display:flex}.segmented{border:1px solid var(--color-control-border);border-radius:8px;display:inline-flex;overflow:hidden}.is-concealed{visibility:hidden}.segmented button{border:0;border-left:1px solid var(--color-control-border);min-width:56px;min-height:36px;font:inherit;color:var(--color-text);background:var(--color-control-bg);cursor:pointer;justify-content:center;align-items:center;gap:6px;padding:0 12px;display:inline-flex}.segmented button:first-child{border-left:0}.segmented button[aria-checked=true]{color:var(--color-accent-text);background:var(--color-accent)}.segmented button:focus-visible{outline:2px solid var(--color-focus);outline-offset:-2px}.stone-icon{border-radius:50%;flex:none;width:.9em;height:.9em;display:inline-block}.stone-icon-black{background:var(--stone-black);box-shadow:0 0 0 1px var(--color-control-border)}.stone-icon-white{background:var(--stone-white);box-shadow:inset 0 0 0 1px var(--stone-white-edge)}.toggle{border:1px solid var(--color-control-border);min-height:36px;font:inherit;color:var(--color-text);background:var(--color-control-bg);cursor:pointer;border-radius:8px;padding:0 12px}.toggle:before{content:"";vertical-align:-.05em;border:1px solid;border-radius:2px;width:.7em;height:.7em;margin-right:6px;display:inline-block}.toggle[aria-pressed=true]{color:var(--color-accent-text);background:var(--color-accent);border-color:var(--color-accent)}.toggle[aria-pressed=true]:before{box-shadow:inset 0 0 0 2px var(--color-accent);background:currentColor}.toggle:focus-visible{outline:2px solid var(--color-focus);outline-offset:2px}.status{width:min(100%, var(--board-max));flex-wrap:wrap;align-items:center;gap:4px 20px;min-height:1.5em;margin:0 auto 8px;display:flex}.turn{align-items:center;gap:6px;font-weight:600;display:inline-flex}.captures{color:var(--color-muted);font-variant-numeric:tabular-nums}.message{min-height:1.5em;color:var(--color-muted);flex-basis:100%;margin:0;line-height:1.5}.actions{gap:8px;margin-left:auto;display:flex}.action{border:1px solid var(--color-control-border);min-height:32px;font:inherit;color:var(--color-text);background:var(--color-control-bg);cursor:pointer;border-radius:8px;padding:0 12px}.action:disabled{color:var(--color-muted);opacity:.5;cursor:default}.action:focus-visible{outline:2px solid var(--color-focus);outline-offset:2px}.board-area{min-height:min(var(--board-min), 100vw - 32px);flex:1 1 0;justify-content:center;align-items:flex-start;display:flex;container-type:size}.board{width:max(min(100cqw, 100cqh, var(--board-max)), min(var(--board-min), 100cqw));aspect-ratio:1;touch-action:manipulation;-webkit-user-select:none;user-select:none;display:block}.board-surface{fill:var(--board-surface)}.layer-grid path,.board-frame{fill:none;stroke:var(--board-line)}.layer-stars circle{fill:var(--board-line)}.layer-labels text{fill:var(--board-label);text-anchor:middle;dominant-baseline:central;font-family:system-ui,-apple-system,sans-serif}.layer-stones{pointer-events:none}.stone-black{fill:var(--stone-black)}.stone-white{fill:var(--stone-white);stroke:var(--stone-white-edge);stroke-width:.03px}.layer-overlay{pointer-events:none}.lp-text{text-anchor:middle;dominant-baseline:central;font-variant-numeric:tabular-nums;font-family:system-ui,-apple-system,sans-serif;font-weight:700}.lp-normal.lp-on-black .lp-text{fill:var(--stone-white)}.lp-normal.lp-on-white .lp-text{fill:var(--stone-black)}.lp-warning .lp-badge{fill:var(--lp-warning)}.lp-danger .lp-badge{fill:var(--lp-danger)}.lp-warning .lp-text,.lp-danger .lp-text{fill:var(--lp-badge-text)}.lp-ring{fill:none;stroke:var(--lp-danger);stroke-width:.06px;transform-box:fill-box;transform-origin:50%;animation:1.6s ease-in-out infinite lp-pulse}.lp-on-black .lp-ring{stroke:var(--lp-badge-text)}@keyframes lp-pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(1.15)}}@media (prefers-reduced-motion:reduce){.lp-ring{animation:none}}.highlight-stone{fill:none;stroke:var(--highlight);stroke-width:.08px}.highlight-liberty{fill:var(--highlight);opacity:.35}.layer-captured{pointer-events:none}.captured-stone,.captured-ring{transform-box:fill-box;transform-origin:50%}.captured-ring{fill:none;stroke:var(--lp-danger)}.preview-stone{opacity:.5}.preview-captured{fill:var(--lp-danger);fill-opacity:.45;stroke:var(--lp-danger);stroke-width:.08px;stroke-dasharray:.12 .08;animation:.9s ease-in-out infinite preview-blink}@keyframes preview-blink{50%{opacity:.35}}.preview-illegal{fill:none;stroke:var(--lp-danger);stroke-width:.1px;stroke-linecap:round}.lp-changed{fill:none;stroke:var(--highlight);stroke-width:.06px;stroke-dasharray:.1 .07}.lp-on-black .lp-changed{stroke:var(--highlight-on-dark)}@media (prefers-reduced-motion:reduce){.preview-captured{animation:none}}