:root{font-family:system-ui,"Microsoft YaHei",sans-serif;color:#253e55;background:#f6f9fc;font-size:14px}*{box-sizing:border-box}body{margin:0}main{padding:20px}header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}h2{font-size:21px;margin:5px 0}.eyebrow{font-size:10px;letter-spacing:2px;color:#7893ab}.local{color:#318b78;background:#e6f5ef;border-radius:20px;padding:6px 12px;font-size:12px}.toolbar,.settings{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-bottom:12px}label{display:flex;align-items:center;gap:8px;font-size:13px}button,select,input[type=number]{font:inherit;border:1px solid #cddce8;border-radius:7px;background:white;color:#28485f;padding:8px}button,.file-button{cursor:pointer}button:hover,.file-button:hover{filter:brightness(.95)}.file-button{background:#236f9c;color:white;padding:10px 16px;border-radius:8px;position:relative;overflow:hidden;font-weight:600}.file-button input{position:absolute;inset:0;opacity:0;width:100%;cursor:pointer}.secondary{background:#e5eff7;color:#285875}.mask-select{flex:1;min-width:220px}.mask-select select{width:100%;min-width:0}.settings{border-top:1px solid #e1eaf1;padding-top:12px}.settings input{width:82px}input[type=range]{width:100px;accent-color:#2384b5}#status{font-size:13px;color:#5c7890;min-height:20px;margin:8px 0}.stage{height:430px;position:relative;background:#080e17;border-radius:10px;overflow:hidden}canvas{width:100%;height:100%;display:block;outline:none}#empty{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;color:#a8bfd1;pointer-events:none}#empty[hidden]{display:none}#empty span{font-size:38px;font-weight:200}#empty strong{font-size:17px;font-weight:500}#empty small{color:#70869b}.bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;margin-top:10px;color:#658096;font-size:12px;overflow-wrap:anywhere}.hint{font-size:12px;color:#7c91a5;line-height:1.8;margin-bottom:0}#legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px;font-size:12px}#legend span{display:flex;align-items:center;gap:5px}#legend i{width:11px;height:11px;border-radius:3px}button:disabled,input:disabled,select:disabled{opacity:.5;cursor:wait}body:has(main:fullscreen){background:#f6f9fc}main:fullscreen{overflow:auto;background:#f6f9fc}main:fullscreen .stage{height:calc(100vh - 280px)}@media(max-width:650px){main{padding:12px}.local{font-size:10px}header{align-items:flex-start}h2{font-size:18px}.toolbar{gap:10px}.mask-select{flex-basis:100%}.stage{height:480px}.settings{gap:8px}.settings label{font-size:12px}}