:root{--bg:#f6f8f7;--paper:#fff;--ink:#19352e;--body:#334a43;--muted:#63756e;--line:#dce5e0;--accent:#08745b;--wash:#edf6f1;--wave:#d9ebe3;--font:'Segoe UI',Arial,sans-serif;font-family:var(--font);font-size:15px;color:var(--ink);color-scheme:light}*{box-sizing:border-box}body{margin:0;background:var(--bg)}button,input{font:inherit}button,a,input,label{touch-action:manipulation}svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}a{color:inherit;text-underline-offset:4px}button{min-height:44px;padding:0 16px;border:1px solid #cbd9d1;border-radius:6px;background:white;color:var(--ink);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:13px;font-weight:600}button:hover:not(:disabled){background:#e9f2ed;border-color:#a9c4b6}button:disabled{opacity:.4;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible,.file-button:focus-within{outline:2px solid var(--accent);outline-offset:4px}.header{min-height:86px;max-width:1240px;margin:auto;padding:14px 32px;display:flex;align-items:center;gap:30px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:31px;font-weight:800;letter-spacing:-1.5px}.brand svg{width:31px;height:31px;stroke-width:2.3;color:var(--accent)}.brand-light{font-weight:400;color:var(--accent);margin-left:5px}.header-description{font-size:12px;color:var(--muted);padding-left:27px;border-left:1px solid #d4ded8}.help-link{margin-left:auto;font-size:13px;text-decoration:none;padding:12px 0}.help-link:hover{text-decoration:underline}main{max-width:1240px;margin:auto;padding:0 32px}.intro{padding:45px 0 33px;display:flex;align-items:end;justify-content:space-between;gap:30px}.intro h1{font-size:38px;line-height:1.15;letter-spacing:-1.4px;margin:0 0 12px;font-weight:700}.intro p{font-size:14px;line-height:1.7;color:var(--muted);margin:0}.privacy-hint{display:flex;align-items:center;gap:8px;font-size:11px;line-height:1.6;color:#4f6c60;padding-bottom:2px;max-width:230px}.privacy-hint svg{width:18px;height:18px}.workbench{display:grid;grid-template-columns:minmax(0,1fr) 275px;border:1px solid var(--line);border-radius:12px;background:var(--paper);box-shadow:0 4px 16px #1b3c2b05;overflow:hidden}.editor-main{min-width:0}.import-row{display:flex;align-items:center;gap:12px;padding:23px 24px}.file-button{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;border-radius:6px;background:var(--accent);color:white;padding:0 17px;font-weight:600;font-size:13px;position:relative;cursor:pointer;white-space:nowrap}.file-button:hover{background:#075b48}.file-button input{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden}.import-row #demo{font-weight:500;font-size:12px}.import-limit{margin-left:auto;color:var(--muted);font-size:11px;white-space:nowrap}.track-head{display:flex;align-items:center;gap:12px;padding:17px 24px;border-top:1px solid var(--line)}.track-icon{width:38px;height:38px;border-radius:7px;background:var(--wash);color:var(--accent);display:grid;place-items:center;flex-shrink:0}.track-name{min-width:0;display:flex;flex-direction:column;gap:5px}.track-name strong{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:430px;font-weight:600}.track-name span{font-size:10px;color:var(--muted)}#duration{margin-left:auto;font-variant-numeric:tabular-nums;font-size:12px;white-space:nowrap;font-weight:600}.wave-wrap{margin:0 24px;background:#eff7f2;border:1px solid #deebe3;border-radius:8px;padding:12px 14px 14px}.wave-wrap.dragover{outline:2px dashed var(--accent);outline-offset:3px}#wave{width:100%;height:210px;display:block;touch-action:none;cursor:ew-resize}.wave-caption{display:flex;justify-content:space-between;gap:12px;font-size:10px;color:#576e61;border-top:1px solid #d2e3d8;padding-top:12px;line-height:1.6}.selection{display:flex;align-items:center;gap:18px;padding:23px 24px 20px}.time-fields{display:flex;align-items:end;gap:12px}.time-fields label{display:flex;flex-direction:column;gap:8px;color:var(--muted);font-size:11px}.time-fields input{width:114px;max-width:100%;min-height:43px;border:1px solid #d4dfd8;border-radius:5px;color:var(--ink);font-size:16px;font-variant-numeric:tabular-nums;padding:8px 11px;background:#fff}.time-divider{padding-bottom:12px;color:#8b9d91}.selection #reset{font-size:11px;min-height:38px;padding:0 11px;margin-top:18px}.selection-time{margin-left:auto;display:flex;flex-direction:column;gap:10px;text-align:right;font-size:10px;color:var(--muted);white-space:nowrap}.selection-time strong{font-size:23px;letter-spacing:-.7px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums}.selection-time strong span{font-size:12px;letter-spacing:0;font-weight:400}.transport{display:flex;align-items:center;gap:10px;padding:0 24px 24px}.transport #preview{background:var(--ink);color:white;border-color:var(--ink);font-size:12px}.transport #preview:hover:not(:disabled){background:#2c4f41}.transport #preview svg{fill:currentColor;width:17px;height:17px;stroke:none}.transport #stop{font-size:12px}.transport #stop svg{width:15px;height:15px;fill:currentColor;stroke:none}#playback-time{font-size:10px;color:var(--muted);margin-left:auto;white-space:nowrap;font-variant-numeric:tabular-nums}.export-panel{display:flex;flex-direction:column;padding:28px 24px;border-left:1px solid var(--line);background:#fcfdfc}.export-panel h2{font-size:20px;letter-spacing:-.6px;margin:0 0 11px;font-weight:650}.export-panel p{font-size:12px;color:var(--muted);line-height:1.7;margin:0}.export-spec{margin:30px 0 27px;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:18px}.export-spec>div{display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:11px}.export-spec dt{color:var(--muted)}.export-spec dd{margin:0;font-weight:550}.fade-option{display:flex;align-items:start;gap:11px;font-size:12px;cursor:pointer;line-height:1.5}.fade-option input{width:17px;height:17px;margin:0;accent-color:var(--accent);flex-shrink:0}.fade-option small{display:block;color:var(--muted);font-size:11px;line-height:1.65;margin-top:6px}.export-panel #export{width:100%;background:var(--accent);color:#fff;border-color:var(--accent);margin-top:auto;min-height:47px}.export-panel #export:hover:not(:disabled){background:#075b48}.export-note{font-size:10px;line-height:1.6;text-align:center;color:var(--muted);margin-top:11px}.status-line{display:flex;align-items:center;gap:9px;padding:17px 8px;color:var(--muted);font-size:11px;min-height:53px}.status-dot{width:5px;height:5px;border-radius:50%;background:#719180;flex-shrink:0}#status{margin:0;line-height:1.6}#status.error{color:#a62b2b}.quick-guide{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:34px;padding:30px 8px 35px;border-top:1px solid var(--line)}.quick-guide>div{display:flex;align-items:start;gap:12px}.quick-guide>div>span{font-size:12px;width:25px;height:25px;display:grid;place-items:center;border:1px solid #ccdad1;border-radius:50%;color:var(--accent);flex-shrink:0}.quick-guide p{font-size:11px;line-height:1.7;color:var(--muted);margin:0}.quick-guide strong{font-weight:600;color:var(--ink);display:block;font-size:13px;margin-bottom:5px}details{border-top:1px solid var(--line);padding:20px 8px 25px}summary{cursor:pointer;font-size:12px;color:var(--muted);line-height:1.6}.guide-content{max-width:850px;font-size:13px;line-height:1.8;color:var(--muted);padding:10px 0}.guide-content p{margin:13px 0}footer{max-width:1240px;margin:auto;padding:22px 32px;display:flex;align-items:center;gap:22px;justify-content:space-between;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}footer>span:first-child{font-size:15px;font-weight:650;color:var(--ink)}footer p{margin:0}noscript{padding:25px;display:block}
@media(max-width:1100px){.workbench{grid-template-columns:minmax(0,1fr) 235px}.export-panel{padding:25px 20px}.selection{gap:12px}.time-fields input{width:96px}.selection-time strong{font-size:20px}.selection #reset{display:none}.track-name strong{max-width:300px}.import-limit{display:none}.import-row{gap:9px}.import-row #demo{font-size:11px;padding:0 11px}.import-row .file-button{font-size:12px;padding:0 13px}.transport{gap:7px}#playback-time{display:none}}
@media(max-width:800px){.header,main,footer{padding-left:20px;padding-right:20px}.header-description{display:none}.intro{padding:32px 0 26px;display:block}.intro h1{font-size:33px}.intro p{font-size:14px}.privacy-hint{margin-top:16px;max-width:none;font-size:11px}.workbench{grid-template-columns:1fr}.export-panel{border-left:0;border-top:1px solid var(--line);padding:24px;display:grid;grid-template-columns:1fr 1fr;gap:18px 25px}.export-panel p{font-size:12px}.export-panel p br{display:none}.export-spec{grid-column:2;grid-row:1/3;padding:0;border:0;margin:0;gap:15px}.fade-option{grid-column:1}.export-panel #export{grid-column:1/3;margin-top:5px;min-height:47px}.export-note{grid-column:1/3;margin-top:-8px}.quick-guide{gap:24px}.quick-guide strong{font-size:12px}#wave{height:200px}.selection-time strong{font-size:23px}.time-fields input{width:130px}.selection #reset{display:inline-flex}.import-row #demo{font-size:12px}.import-row .file-button{font-size:13px}.import-limit{display:block}}
@media(max-width:520px){:root{font-size:16px}.header{min-height:74px;padding:14px 17px;gap:15px}.brand{font-size:29px;gap:9px}.brand svg{width:25px;height:25px}.help-link{font-size:11px}main{padding:0 14px}.intro{padding:28px 3px 24px}.intro h1{font-size:31px;letter-spacing:-1px;margin-bottom:11px}.intro p{font-size:14px;line-height:1.7;max-width:330px}.privacy-hint{font-size:11px;gap:7px;margin-top:15px}.workbench{border-radius:9px}.import-row{padding:18px 16px;display:grid;grid-template-columns:1fr;gap:10px}.file-button,.import-row .file-button{font-size:14px;min-height:48px}.import-row #demo{font-size:13px;min-height:44px}.import-limit{display:none}.track-head{padding:17px 16px;gap:9px}.track-icon{width:31px;height:31px}.track-icon svg{width:18px;height:18px}.track-name{max-width:calc(100% - 112px)}.track-name strong{font-size:12px;max-width:100%}.track-name span{font-size:9px;line-height:1.5}#duration{font-size:11px}.wave-wrap{margin:0 12px;padding:8px 10px 11px;border-radius:6px}#wave{height:170px}.wave-caption{font-size:10px;display:block;padding-top:9px}.wave-caption>span:last-child{display:none}.selection{padding:21px 16px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:18px 12px;align-items:end}.time-fields{gap:8px;grid-column:1/3;display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr)}.time-fields label{font-size:13px;gap:9px}.time-fields input{width:100%;min-height:47px;font-size:17px;padding:10px 12px}.time-divider{padding-bottom:14px}.selection #reset{margin:0;justify-self:start;font-size:12px;min-height:44px}.selection-time{font-size:11px;gap:5px}.selection-time strong{font-size:23px}.transport{padding:0 16px 22px;gap:10px}.transport #preview{font-size:13px;min-height:47px;flex:1;padding:0 10px}.transport #stop{min-height:47px;padding:0 13px}.transport #stop span{display:none}.export-panel{padding:24px 18px;display:flex;gap:0}.export-panel h2{font-size:22px}.export-panel p{font-size:13px}.export-spec{margin:22px 0 23px;padding:19px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);gap:18px}.export-spec>div{font-size:12px}.fade-option{font-size:14px;min-height:44px}.fade-option input{width:19px;height:19px;margin-top:1px}.fade-option small{font-size:12px}.export-panel #export{margin-top:24px;font-size:15px;min-height:49px}.export-note{font-size:11px;margin-top:12px}.status-line{font-size:12px;padding:18px 5px;align-items:start}.status-dot{margin-top:7px}.quick-guide{display:flex;flex-direction:column;gap:23px;padding:25px 5px 29px}.quick-guide p{font-size:13px;line-height:1.7}.quick-guide strong{font-size:15px;margin-bottom:3px}.quick-guide>div>span{width:27px;height:27px;font-size:12px;margin-top:2px}summary{font-size:13px;padding:3px 0}.guide-content{font-size:14px}footer{flex-wrap:wrap;justify-content:flex-start;gap:12px 20px;padding:23px 19px;font-size:11px}footer>span:last-child{width:100%}.header .brand-light{margin-left:4px}}
@media(prefers-reduced-motion:no-preference){button,.file-button{transition:background-color .15s ease,border-color .15s ease}}