*{box-sizing:border-box}body{margin:0;background:#f7f8f4;color:#24493c;font-family:system-ui,'Microsoft YaHei',sans-serif}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer;border:1px solid #d3ddd4;background:transparent;color:inherit;padding:7px 11px;border-radius:6px;font-size:12px}button:hover{background:#e7eee6}button:focus-visible,a:focus-visible{outline:2px solid #348567;outline-offset:3px}button:disabled{opacity:.4;cursor:default}button[aria-pressed=true]{background:#204e3c;color:#fff;border-color:#204e3c}[hidden]{display:none!important}header{height:66px;padding:0 4vw;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #dce3db;background:#fff}.brand{font-size:21px;font-weight:650}.brand span{font-size:12px;font-weight:400;color:#788b7d}header>a:last-child{font-size:13px}main{max-width:1540px;margin:auto;padding:26px 4vw}.tank-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:20px}h1{font-size:25px;font-weight:550;margin:0 0 7px}h2{font-size:15px;margin:0;font-weight:600}p{font-size:12px;line-height:1.7;color:#708276;margin:0}.sizes{display:flex;gap:5px;align-items:center}.sizes button{font-size:11px}.sizes small{display:block;font-size:9px;opacity:.7;margin-top:3px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:24px;align-items:start}.scene{--tank-ratio:1.5;position:relative;aspect-ratio:var(--tank-ratio);width:min(100%,calc(65vh * var(--tank-ratio)));max-width:100%;margin:auto;background:#172a21;border-radius:8px;overflow:hidden;box-shadow:0 12px 30px #183e2720}.scene canvas{width:100%;height:100%;display:block}.scene-name,.ruler{position:absolute;color:#fff9;text-shadow:0 1px 3px #0008;font-size:11px;pointer-events:none}.scene-name{top:14px;left:18px}.ruler{bottom:12px;left:20px;right:20px;text-align:center;border-bottom:1px solid #ffffff35;padding-bottom:6px}.empty-overlay{position:absolute;inset:0;background:#051b1830;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;gap:8px}.empty-overlay p{color:#e8f2e7}.empty-overlay button{color:#fff;background:#183d30;border-color:#789a84}.toolbar{display:flex;justify-content:space-between;align-items:center;padding:14px 0;font-size:12px}.toolbar>div{display:flex;gap:6px}#feedback{color:#916544;min-height:0}.background-heading{display:flex;align-items:center;justify-content:space-between;margin:12px 0 10px}.background-heading span{font-size:10px;color:#7f8e83}.backgrounds{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px}.backgrounds button{padding:3px;background:#fff;border:1px solid #dfe5dc;overflow:hidden}.backgrounds button[aria-pressed=true]{border:2px solid #28744e;padding:2px;color:#214c38;background:#e8f1e6}.backgrounds img{display:block;width:100%;aspect-ratio:1.5;object-fit:cover;border-radius:3px}.backgrounds span{display:block;font-size:10px;padding:5px 1px 3px}aside{padding:18px;background:#fff;border:1px solid #dce4da;border-radius:8px}.selected-heading{display:flex;align-items:center;justify-content:space-between}.selected-heading span{font-weight:400;color:#8b9a8e;font-size:12px}.selected-heading button{border:0;color:#899587;padding:4px}.selected-fish{padding:14px 0;border-bottom:1px solid #e8ece5}.fish-label{display:flex;align-items:center;gap:8px}.fish-label img{width:64px;height:43px;object-fit:contain;background:#f6f8f3;border-radius:4px}.fish-label b{font-size:12px;font-weight:600}.fish-label small{font-size:9px;color:#8d9788;display:block;margin-top:3px}.count-controls{display:flex;align-items:center;gap:6px;margin:9px 0 0 72px}.count-controls button{padding:4px 8px}.count-controls output{font-size:12px;min-width:16px;text-align:center}.count-controls .remove{border:0;margin-left:auto;color:#9a9f93}.fish-warning{font-size:10px;margin:7px 0 0 72px;color:#99734c}.add-more{display:block;text-align:center;font-size:12px;border:1px dashed #c9d9c8;padding:11px;margin-top:16px;border-radius:5px}.limit{font-size:10px;margin-top:12px}.limitations{font-size:11px;color:#7b8c7e;margin-top:18px;line-height:1.8}.limitations summary{cursor:pointer}.limitations p{font-size:11px;margin:8px 0}.immersive header,.immersive .tank-heading,.immersive aside,.immersive .background-heading,.immersive .backgrounds,.immersive .limitations{display:none}.immersive{background:#10251b}.immersive main{max-width:1400px;padding:20px}.immersive .workspace{display:block}.immersive .scene{width:min(100%,calc(83vh * var(--tank-ratio)))}.immersive .toolbar{color:#dbe8d6}@media(max-width:950px){.tank-heading{display:block}.sizes{margin-top:15px;flex-wrap:wrap}.workspace{grid-template-columns:1fr}.backgrounds{grid-template-columns:repeat(4,1fr)}}
.backgrounds img{height:auto}

aside{position:sticky;top:20px;max-height:calc(100vh - 40px);display:flex;flex-direction:column}
#selected{overflow:auto;min-height:0;scrollbar-width:thin}
.selected-heading,.add-more,.limit{flex-shrink:0}
@media(max-width:950px){aside{position:static;max-height:none}#selected{overflow:visible}}