:root{color:#22211f;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;background:#f8f4ec;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0}button{font:inherit}.shell{width:min(1120px,100%);min-height:100vh;margin:0 auto;padding:24px}.topbar{justify-content:space-between;align-items:center;gap:16px;margin-bottom:16px;display:flex}.eyebrow{color:#6b645b;text-transform:uppercase;margin:0 0 4px;font-size:.78rem;font-weight:700}h1{margin:0;font-size:2rem;line-height:1.1}.status{text-align:center;background:#fffaf1;border:1px solid #d4c9b8;border-radius:8px;min-width:80px;padding:8px 12px;font-weight:800}.status.valid{color:#24573b}.status.invalid{color:#9a342c}.status.complete{color:#2856a3}.notice{border-radius:8px;margin-bottom:16px;padding:12px 14px}.notice.error{background:#fff1ef;border:1px solid #e3a49d}.play-area{grid-template-columns:minmax(0,1fr) 320px;align-items:start;gap:24px;display:grid}.board-wrap{-webkit-user-select:none;user-select:none;place-items:center;min-width:0;display:grid;position:relative}.board-tool{color:#302b26;text-align:center;background:#fffaf1;border:1px solid #d2c6b5;border-radius:8px;width:min(100%,680px);margin-bottom:10px;padding:8px 12px;font-size:.86rem;font-weight:900;line-height:1.35}.board-tool.active{color:#fffaf1;background:#24211e;border-color:#24211e}.board-tool.locked{color:#24573b;background:#eef8f2;border-color:#8eb7a0}.board{aspect-ratio:1;grid-template-columns:repeat(var(--size), minmax(0, 1fr));grid-template-rows:repeat(var(--size), minmax(0, 1fr));touch-action:none;-webkit-user-select:none;user-select:none;background:#2e2a26;border:3px solid #2e2a26;border-radius:8px;width:min(100%,680px);display:grid;overflow:hidden;box-shadow:0 18px 36px #362d2124}.board.locked,.board.locked .cell{cursor:default}.cell{background:var(--region-color);color:#221f1b;cursor:pointer;touch-action:none;-webkit-user-select:none;user-select:none;border:1px solid #2e2a2673;place-items:center;min-width:0;min-height:0;padding:0;display:grid;position:relative}.cell:after{content:"";pointer-events:none;border:2px solid #0000;border-radius:6px;position:absolute;inset:5px}.cell:hover:after,.cell:focus-visible:after{border-color:#23221f8c}.cell span{aspect-ratio:1;place-items:center;width:76%;font-size:clamp(1.45rem,7vw,3.5rem);line-height:1;display:grid}.cell.mark span{color:#221f1b9e;font-size:clamp(1.7rem,7vw,3.7rem);font-weight:900}.cell.mark.wrong-mark span{color:#b3392f}.cell.mark.wrong-mark:after{background:#b3392f1a;border-color:#b3392fb8}.cell.draft-cat span,.cell.draft-mark span{opacity:.58;transform:scale(.92)}.cell.draft-mark:after,.cell.draft-erase:after,.cell.draft-cat:after{background:#fffaf138;border-color:#24211eb8}.cell.draft-erase{filter:saturate(.4)brightness(1.08)}.cell.conflict:after{background:#b3392f1f}.cell.conflict-row:after{border-top-color:#b3392f;border-bottom-color:#b3392f}.cell.conflict-column:after{border-left-color:#b3392f;border-right-color:#b3392f}.cell.conflict-region:after{outline-offset:-7px;outline:3px solid #b3392f6b}.cell.conflict-diagonal span{text-shadow:-2px -2px #b3392f57,2px 2px #b3392f57}.panel{gap:16px;display:grid}.actions button{color:#24211e;cursor:pointer;touch-action:manipulation;-webkit-user-select:none;user-select:none;background:#fffaf1;border:1px solid #cfc2b0;border-radius:8px;min-height:44px;font-weight:800}.message{background:#fffaf1;border:1px solid #d6cbb9;border-radius:8px;min-height:72px;padding:14px;line-height:1.45}.message.win{color:#24573b;background:#eef8f2;border-color:#8eb7a0;font-weight:800}.conflict-breakdown{color:#8f312a;background:#fff1ef;border:1px solid #e3a49d;border-radius:8px;gap:6px;min-height:40px;margin:0;padding:12px 14px 12px 30px;font-weight:800;display:grid}.conflict-breakdown.ok{color:#24573b;background:#f2faf4;border-color:#cdddcf;padding:12px 14px;display:block}.metrics{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;display:grid}.metrics div{text-align:center;background:#fffaf1;border:1px solid #d6cbb9;border-radius:8px;gap:2px;min-width:0;padding:10px 8px;display:grid}.metrics span{font-size:1.35rem;font-weight:900}.metrics small{color:#6b645b;text-transform:uppercase;font-size:.7rem;font-weight:800}.actions{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}.meta{gap:8px;margin:0;padding:0;display:grid}.meta div{border-bottom:1px solid #ded4c4;grid-template-columns:72px minmax(0,1fr);align-items:baseline;gap:8px;padding-bottom:8px;display:grid}.meta dt{color:#6b645b;text-transform:uppercase;font-size:.76rem;font-weight:800}.meta dd{overflow-wrap:anywhere;min-width:0;margin:0;font-weight:700}.copy-buffer{opacity:0;pointer-events:none;width:1px;height:1px;position:fixed}.contract-shell{width:min(960px,100%);min-height:100vh;margin:0 auto;padding:24px}.contract-actions{justify-content:flex-end;margin-bottom:12px;display:flex}.contract-play{color:#fffaf1;background:#24211e;border:1px solid #24211e;border-radius:8px;place-items:center;min-height:44px;padding:0 16px;font-weight:800;text-decoration:none;display:inline-grid}.contract-json{color:#24211e;white-space:pre;background:#fffaf1;border:1px solid #d6cbb9;border-radius:8px;margin:0;padding:18px;font-size:.9rem;line-height:1.5;overflow:auto}@media (width<=840px){.shell{padding:16px}.topbar{align-items:flex-start}.play-area,.panel{grid-template-columns:1fr}}@media (width<=520px){.shell{padding:12px}.topbar{flex-direction:column}.status{width:100%}.cell span{font-size:clamp(1rem,8vw,2.1rem)}}