:root{--bg:#1a1410;--bg-panel:#2a2118;--wood:#c4a574;--wood-dark:#8b6914;--wood-light:#e8d5b5;--target:#f5e6c8;--target-border:#e8a838;--text:#f0e6d8;--text-dim:#a89070;--accent:#d4a017;--btn:#5c4030;--btn-hover:#7a5538;--btn-primary:#c4783a;--btn-primary-hover:#d4894a;--border:#4a3828;--cell:#3d2e22;--cell-empty:#2e241c;--shadow:#00000073;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;font-family:PingFang SC,Noto Sans SC,Microsoft YaHei,system-ui,sans-serif;line-height:1.45}*{box-sizing:border-box}body{background:radial-gradient(ellipse at top, #2c2015 0%, transparent 55%), var(--bg);min-height:100vh;margin:0}#app{max-width:960px;margin:0 auto;padding:1.25rem 1rem 2.5rem}header.app-header{text-align:center;margin-bottom:1.25rem}header.app-header h1{letter-spacing:.04em;color:var(--wood-light);margin:0 0 .35rem;font-size:1.65rem;font-weight:700}header.app-header p{color:var(--text-dim);margin:0;font-size:.92rem}.layout{gap:1.25rem;display:grid}@media (width>=820px){.layout{grid-template-columns:280px 1fr;align-items:start}}.panel{background:var(--bg-panel);border:1px solid var(--border);box-shadow:0 10px 28px var(--shadow);border-radius:14px;padding:1rem 1.1rem}.panel h2{color:var(--accent);margin:0 0 .85rem;font-size:1rem;font-weight:600}.field{flex-direction:column;gap:.3rem;margin-bottom:.75rem;display:flex}.mode-switch{border:1px solid var(--border);background:#1f1712;border-radius:10px;grid-template-columns:1fr 1fr;gap:4px;margin-bottom:.55rem;padding:4px;display:grid}.mode-switch button{color:var(--text-dim);background:0 0;border-radius:8px;padding:.45rem .3rem;font-size:.88rem}.mode-switch button:hover:not(:disabled){background:#ffffff0d}.mode-switch button.active{background:var(--btn-primary);color:#1a120c}.mode-switch button.active:hover:not(:disabled){background:var(--btn-primary-hover)}.mode-hint{color:var(--text-dim);margin:0 0 .75rem;font-size:.78rem;line-height:1.45}.field label{color:var(--text-dim);font-size:.82rem}.field[hidden]{display:none}.field select{appearance:none;background:var(--cell) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath fill='%23a89070' d='M0 0l6 8 6-8z'/%3E%3C/svg%3E") right .7rem center / 10px no-repeat;color:var(--text);border:1px solid var(--border);cursor:pointer;border-radius:8px;padding:.55rem 2rem .55rem .75rem;font-size:1rem}.field select:focus,.field input[type=number]:focus{outline:2px solid var(--accent);outline-offset:1px}.field select:disabled{opacity:1;color:var(--wood-light);cursor:not-allowed;background-color:#2a2118;background-image:none;padding-right:.75rem}.field input[type=number]{background:var(--cell);width:100%;color:var(--text);border:1px solid var(--border);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;border-radius:8px;padding:.55rem .75rem;font-family:inherit;font-size:1rem}.btn-row{flex-wrap:wrap;gap:.5rem;margin-top:.5rem;display:flex}button{cursor:pointer;color:var(--text);background:var(--btn);border:none;border-radius:8px;padding:.55rem .9rem;font-size:.92rem;font-weight:600;transition:background .15s,transform .1s,opacity .15s}button:hover:not(:disabled){background:var(--btn-hover)}button:active:not(:disabled){transform:translateY(1px)}button:disabled{opacity:.45;cursor:not-allowed}button.primary{background:var(--btn-primary)}button.primary:hover:not(:disabled){background:var(--btn-primary-hover)}.speed-row{color:var(--text-dim);align-items:center;gap:.6rem;margin-top:.9rem;font-size:.85rem;display:flex}.speed-row input[type=range]{accent-color:var(--accent);flex:1}.status{min-height:2.6rem;color:var(--text-dim);margin-top:.9rem;font-size:.9rem;line-height:1.5}.status.ok{color:#9dce8a}.status.err{color:#e09070}.status.info{color:#d4c08a}.board-wrap{justify-content:center;padding:.5rem 0;display:flex}.board{border:2px solid var(--wood-dark);background:#1f1712;border-radius:12px;grid-template-rows:repeat(8,minmax(42px,56px));grid-template-columns:repeat(7,minmax(42px,56px));gap:4px;padding:10px;display:grid;box-shadow:inset 0 0 0 1px #5a4028}.cell{-webkit-user-select:none;user-select:none;background:var(--cell-empty);color:var(--text-dim);border:1px solid #3a2c20;border-radius:7px;justify-content:center;align-items:center;font-size:clamp(.65rem,2.2vw,.78rem);font-weight:600;transition:background .2s,color .2s,transform .25s,opacity .25s;display:flex;position:relative}.cell.blocked{visibility:hidden;pointer-events:none}.cell.target{background:var(--target);color:#5a3e1a;border-color:var(--target-border);z-index:1;box-shadow:0 0 0 2px #e8a83859}.cell.piece{color:#1a120c;text-shadow:0 1px #ffffff40;border-color:#0003}.cell.piece .pid{opacity:.7;font-size:.58rem;font-weight:700;position:absolute;top:3px;right:4px}.cell.placing{animation:.28s ease-out popIn}@keyframes popIn{0%{opacity:0;transform:scale(.55)}to{opacity:1;transform:scale(1)}}.legend{flex-wrap:wrap;justify-content:center;gap:.4rem;margin-top:.9rem;display:flex}.legend span{color:var(--text-dim);align-items:center;gap:.3rem;font-size:.75rem;display:inline-flex}.swatch{border:1px solid #00000040;border-radius:3px;width:12px;height:12px}.footer-note{text-align:center;color:var(--text-dim);margin-top:1.25rem;font-size:.78rem}