:root{color-scheme:dark;--bg:#080a0c;--panel:#0e1115;--line:#232933;--text:#e8edf2;--muted:#7f8b99;--accent:#f0f3f6}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,Segoe UI,sans-serif}
header{height:76px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 24px;background:#0b0d10}
h1{font-size:20px;margin:2px 0 0}.eyebrow,.section-title,.preview-head{font-size:11px;letter-spacing:.18em;color:var(--muted);font-weight:700}
.actions{display:flex;gap:8px}button,select,input,textarea{border:1px solid var(--line);background:#11151a;color:var(--text);border-radius:7px}
button{padding:10px 14px;cursor:pointer;font-weight:700}.primary{background:#e9edf2;color:#0b0d10;border-color:#e9edf2}.danger{color:#ff9696}
main{display:grid;grid-template-columns:minmax(390px,520px) 1fr;gap:16px;padding:16px;height:calc(100vh - 76px)}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:10px;min-height:0}.editor{padding:18px;overflow:auto}
.section-title{margin:10px 0 12px;padding-top:8px;border-top:1px solid var(--line)}.section-title:first-child{border:0;margin-top:0}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.wide{grid-column:1/-1}
label{display:flex;flex-direction:column;gap:6px;font-size:12px;color:#aab4bf}input,select,textarea{width:100%;padding:10px;font:inherit;outline:none}textarea{resize:vertical}
input:focus,select:focus,textarea:focus{border-color:#687383}
.drop{border:1px dashed #3a4450;border-radius:8px;padding:18px;text-align:center;margin-bottom:10px;position:relative;color:#b6c0cb}
.drop.drag{border-color:#fff;background:#151a20}.drop span{display:block;color:var(--muted);font-size:12px;margin-top:5px}.drop input{margin-top:10px}
.preview-panel{display:flex;flex-direction:column;overflow:hidden}.preview-head{height:42px;display:flex;align-items:center;justify-content:space-between;padding:0 14px;border-bottom:1px solid var(--line)}
pre{margin:0;padding:22px;overflow:auto;flex:1;font-family:"Cascadia Mono","Consolas","Courier New",monospace;font-size:13px;line-height:1.28;white-space:pre;color:#dfe5eb}
.preset-row{display:grid;grid-template-columns:1fr auto 1fr auto;gap:7px}
@media(max-width:950px){main{grid-template-columns:1fr;height:auto}.preview-panel{min-height:650px}}.version{font-size:12px;opacity:.5;font-weight:600}.inline{display:flex;gap:8px}.inline input{flex:1}.hint,.status{font-size:12px;color:#8d96a3;margin-top:8px}.status.error{color:#ff8a8a}.results{display:grid;gap:8px;margin-top:10px;max-height:260px;overflow:auto}.result{border:1px solid #2b313a;border-radius:8px;padding:10px;display:flex;justify-content:space-between;gap:12px;align-items:center;background:#11151a}.result small{display:block;color:#8d96a3;margin-top:3px}.track-editor{margin-top:16px;border-top:1px solid #262c34;padding-top:14px}.track-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.track-row{display:grid;grid-template-columns:42px 70px 1.1fr .9fr .9fr .9fr 34px;gap:6px;margin-bottom:6px}.track-row.sub{grid-template-columns:42px 80px 1fr 1fr 34px}.track-row input{min-width:0}.track-num{display:flex;align-items:center;justify-content:center;color:#8d96a3;font-family:monospace}.mini-danger{padding:5px 8px!important;color:#ff8a8a}@media(max-width:700px){.track-row,.track-row.sub{grid-template-columns:1fr 1fr}.track-num{justify-content:flex-start}}
.tv-fields{display:grid;grid-template-columns:1fr 1fr auto;gap:8px;align-items:end}.tv-fields button{height:39px}.checkline{flex-direction:row;align-items:center;margin-top:4px}.checkline input{width:auto}.track-row.audio{grid-template-columns:42px 64px 1fr .8fr .85fr .85fr .9fr 34px}
@media(max-width:700px){.tv-fields{grid-template-columns:1fr 1fr}.tv-fields button{grid-column:1/-1}.track-row.audio{grid-template-columns:1fr 1fr}}

/* v4 MediaInfo paste */
.json-paste{margin:14px 0 18px}.json-paste textarea{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;min-height:150px;resize:vertical}.or-divider{display:flex;align-items:center;gap:12px;margin:14px 0;color:#7f8794;font-size:11px;font-weight:800;letter-spacing:.14em}.or-divider:before,.or-divider:after{content:"";height:1px;background:#2b313b;flex:1}.json-actions{display:flex;gap:8px;margin-top:8px}