:root{
  --bg:#f6f8fc; --card:#fff; --text:#172033; --muted:#697386;
  --line:#e4e8f0; --accent:#5b5cf0; --accent2:#764df5;
  --shadow:0 20px 60px rgba(27,38,70,.10);
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}
.topbar{height:72px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100% - 1160px)/2))}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px}
.brand-mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;color:white;background:linear-gradient(135deg,var(--accent),var(--accent2))}
.privacy{color:var(--muted);font-size:13px}
.page{max-width:1000px;margin:auto;padding:64px 20px 70px}
.hero{text-align:center;margin-bottom:34px}
.eyebrow{font-size:12px;font-weight:800;letter-spacing:1.8px;color:var(--accent)}
h1{font-size:clamp(36px,6vw,58px);line-height:1.05;margin:12px 0}
h1 span{color:var(--accent)}
.hero p{font-size:18px;color:var(--muted);margin:0}
.converter-card{background:var(--card);border:1px solid var(--line);border-radius:24px;padding:24px;box-shadow:var(--shadow)}
.drop-zone{min-height:320px;border:2px dashed #cdd3e2;border-radius:18px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;cursor:pointer;transition:.2s}
.drop-zone:hover,.drop-zone.dragging{border-color:var(--accent);background:#f8f7ff}
.upload-icon{width:64px;height:64px;border-radius:18px;background:#eeefff;color:var(--accent);display:grid;place-items:center;font-size:34px;font-weight:700;margin-bottom:15px}
.drop-zone h2{margin:0 0 7px;font-size:23px}
.drop-zone p{margin:0 0 20px;color:var(--muted)}
.drop-zone small{margin-top:10px;color:#8992a5}
button{font:inherit;border:0;cursor:pointer}
.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;padding:12px 22px;border-radius:11px;font-weight:750;box-shadow:0 8px 20px rgba(91,92,240,.22)}
.primary:hover{filter:brightness(1.05)}
.secondary{background:#eef0ff;color:#4e50d9;padding:12px 22px;border-radius:11px;font-weight:750}
.ghost{background:#f3f5f8;color:#50596b;padding:12px 22px;border-radius:11px;font-weight:700}
.large{padding:14px 24px}
.controls{display:flex;gap:30px;align-items:center;padding:22px 4px 8px}
.controls label:first-child{flex:1;font-weight:750}
.quality-row{display:flex;align-items:center;gap:14px;margin-top:10px}
input[type=range]{width:100%;accent-color:var(--accent)}
output{min-width:52px;text-align:center;padding:7px 9px;background:#f1f3f8;border-radius:8px;font-size:13px}
.switch-row{display:flex;align-items:center;gap:10px;color:#515b6e;font-weight:650;white-space:nowrap}
.switch-row input{display:none}
.switch{width:42px;height:24px;border-radius:99px;background:#ccd2de;position:relative;transition:.2s}
.switch:after{content:"";position:absolute;width:18px;height:18px;border-radius:50%;background:#fff;top:3px;left:3px;transition:.2s;box-shadow:0 1px 4px #0002}
.switch-row input:checked+.switch{background:var(--accent)}
.switch-row input:checked+.switch:after{left:21px}
.status{margin:18px 0 0;padding:12px 14px;background:#f5f6fa;border-radius:10px;color:var(--muted);font-size:14px}
.results{display:grid;gap:12px;margin-top:18px}
.item{display:grid;grid-template-columns:64px 1fr auto;gap:14px;align-items:center;border:1px solid var(--line);border-radius:14px;padding:10px}
.thumb{width:64px;height:64px;border-radius:10px;object-fit:cover;background:#f1f3f7}
.item-name{font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.item-meta{font-size:12px;color:var(--muted);margin-top:4px}
.item-actions{display:flex;gap:8px}
.item-actions button{padding:9px 12px;border-radius:9px;font-size:13px}
.actions{display:flex;justify-content:flex-end;gap:10px;margin-top:18px}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-top:22px}
.features article{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}
.features b{display:block;margin-bottom:7px}
.features span{font-size:13px;color:var(--muted);line-height:1.5}
footer{text-align:center;padding:25px;color:#8a92a2;font-size:13px}
@media(max-width:700px){
 .privacy{display:none}.page{padding-top:40px}.converter-card{padding:14px}.controls{display:block}.switch-row{margin-top:18px}
 .features{grid-template-columns:1fr}.drop-zone{min-height:280px}.item{grid-template-columns:54px 1fr}.thumb{width:54px;height:54px}.item-actions{grid-column:2}
 .actions{flex-wrap:wrap}.actions button{flex:1}
}