:root{
  --black:#0b0b0b; --white:#ffffff; --grey:#8a8a8a; --line:#2a2a2a;
  --orange:#ff7a1a; --orange-soft:#ffd9bd; --chip:#1a1a1a;
}
*{box-sizing:border-box; -webkit-tap-highlight-color:transparent;}
html,body{margin:0;padding:0;background:var(--black);color:var(--white);
  font-family:'Poppins',system-ui,sans-serif;}
header{display:flex;align-items:baseline;gap:10px;padding:12px 16px;border-bottom:1px solid var(--line);}
.brand{font-weight:800;font-size:22px;letter-spacing:1px;}
.brand span{color:var(--orange);}
.sub{color:var(--grey);font-size:12px;}
main{max-width:980px;margin:0 auto;padding:12px;}
#preview-wrap{position:relative;width:min(60vw,300px);margin:0 auto;}
#preview{width:100%;height:auto;border-radius:12px;background:#000;display:block;border:1px solid var(--line);}
#preview-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;}
.round-btn{width:64px;height:64px;border-radius:50%;border:none;background:rgba(255,122,26,.92);
  color:#000;font-size:22px;font-weight:800;cursor:pointer;}
.round-btn:active{transform:scale(.95);}
#transport{display:flex;align-items:center;gap:12px;padding:8px 4px;color:var(--grey);font-size:13px;}
#transport .spacer{flex:1;}
.zoom-label{font-size:12px;display:flex;align-items:center;gap:6px;}
#mediabar{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0;}
.mbtn{background:var(--chip);color:var(--white);border:1px solid var(--line);border-radius:10px;
  padding:10px 14px;font-family:inherit;font-size:13px;font-weight:600;cursor:pointer;}
.mbtn:active{background:#262626;}
.mbtn.accent{background:var(--orange);color:#000;border-color:var(--orange);}
.mbtn.danger{border-color:#a33;color:#ff8f8f;}
.hidden{display:none !important;}
#inspector{background:var(--chip);border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin:8px 0;}
#insp-title{font-size:12px;color:var(--orange);font-weight:600;margin-bottom:6px;}
#insp-body{font-size:13px;}
#insp-body textarea{width:100%;min-height:60px;background:#111;color:#fff;border:1px solid var(--line);
  border-radius:8px;font-family:inherit;font-size:14px;padding:8px;}
#insp-body .row{display:flex;gap:8px;align-items:center;margin-top:8px;flex-wrap:wrap;}
#insp-body input[type=text]{width:90px;background:#111;color:#fff;border:1px solid var(--line);
  border-radius:8px;padding:8px;font-family:inherit;font-size:13px;}
#insp-body label{font-size:12px;color:var(--grey);}

#timeline-wrap{overflow-x:auto;overflow-y:hidden;border:1px solid var(--line);border-radius:12px;
  background:#101010;margin-top:8px;-webkit-overflow-scrolling:touch;}
#timeline{position:relative;padding:4px 0;}
.track-row{display:flex;align-items:stretch;min-height:44px;border-bottom:1px solid var(--line);}
.track-label{flex:0 0 64px;display:flex;align-items:center;justify-content:center;font-size:10px;
  color:var(--grey);letter-spacing:1px;border-right:1px solid var(--line);position:sticky;left:0;
  background:#101010;z-index:3;}
.track-lane{position:relative;flex:1;min-height:44px;}
#ruler{min-height:22px;}
#ruler-lane{min-height:22px;cursor:pointer;}
.tick{position:absolute;top:0;bottom:0;border-left:1px solid #333;color:#555;font-size:9px;padding-left:3px;}
.clip-block{position:absolute;top:4px;bottom:4px;border-radius:8px;background:#242424;
  border:1px solid #3a3a3a;color:#fff;font-size:11px;overflow:hidden;cursor:grab;
  display:flex;align-items:center;padding:0 10px;white-space:nowrap;touch-action:none;}
.clip-block.sel{border-color:var(--orange);box-shadow:0 0 0 1px var(--orange);}
.clip-block.vo{background:#1c2b1c;border-color:#2f4a2f;}
.clip-block.cap{background:#2b2417;border-color:#4a3d22;font-size:10px;}
.clip-block .handle{position:absolute;top:0;bottom:0;width:14px;cursor:ew-resize;z-index:2;touch-action:none;}
.clip-block .handle.l{left:0;background:linear-gradient(90deg,rgba(255,122,26,.5),transparent);}
.clip-block .handle.r{right:0;background:linear-gradient(-90deg,rgba(255,122,26,.5),transparent);}
#playhead-line{position:absolute;top:0;bottom:0;width:2px;background:var(--orange);z-index:4;pointer-events:none;}
#playhead-line::before{content:'';position:absolute;top:0;left:-5px;border:6px solid transparent;border-top:8px solid var(--orange);}
#clip-actions{display:flex;gap:8px;margin-top:8px;}
#export-status{margin-top:12px;background:var(--chip);border:1px solid var(--line);border-radius:12px;padding:12px;}
#export-status progress{width:100%;height:10px;margin:8px 0;}
#export-download{display:inline-block;text-decoration:none;text-align:center;}
footer{text-align:center;color:#555;font-size:11px;padding:18px 0 30px;}
@media (min-width:760px){ #preview-wrap{width:300px;} }