:root{--bg: #f7f8fb;--surface: #ffffff;--ink: #1a2233;--muted: #5b6678;--line: #e4e8f0;--accent: #3b5bff;--accent-ink: #ffffff;--ok: #18a05a;--warn: #b54708;--err: #c0362c;--radius: 14px;--shadow: 0 1px 2px rgba(20, 30, 60, .06), 0 8px 24px rgba(20, 30, 60, .06);--maxw: 940px;font-synthesis:none}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.6;font-size:17px}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}.site-header{background:var(--surface);border-bottom:1px solid var(--line)}.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:16px;height:60px}.brand{font-weight:700;font-size:18px;color:var(--ink);display:inline-flex;align-items:center;gap:8px}.brand:hover{text-decoration:none}.nav{display:flex;gap:18px;flex-wrap:wrap;font-size:15px}.nav a{color:var(--muted)}.site-footer{border-top:1px solid var(--line);margin-top:56px;padding:28px 0;color:var(--muted);font-size:14px;background:var(--surface)}.site-footer .foot-links{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:10px}.hero{text-align:center;padding:44px 0 8px}h1{font-size:clamp(28px,5vw,40px);line-height:1.15;margin:0 0 10px;letter-spacing:-.02em}.lead{color:var(--muted);font-size:19px;max-width:620px;margin:0 auto}.converter{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;margin:26px 0}.dropzone{border:2px dashed #c4ccdb;border-radius:12px;padding:40px 20px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s;background:#fbfcff}.dropzone:hover,.dropzone:focus-visible,.dropzone.is-drag{border-color:var(--accent);background:#f2f5ff;outline:none}.dropzone .dz-icon{font-size:30px}.dropzone .dz-main{font-weight:600;font-size:18px;margin-top:6px}.dropzone .dz-sub{color:var(--muted);font-size:14px;margin-top:4px}.controls{display:flex;flex-wrap:wrap;gap:18px 26px;align-items:center;margin-top:18px}.control-label{font-size:13px;color:var(--muted);display:block;margin-bottom:6px;font-weight:600;text-transform:uppercase;letter-spacing:.04em}.segmented{display:inline-flex;background:#eef1f7;border-radius:10px;padding:3px}.segmented button{border:0;background:transparent;padding:7px 16px;border-radius:8px;font-weight:600;font-size:14px;color:var(--muted);cursor:pointer}.segmented button.is-active{background:var(--surface);color:var(--ink);box-shadow:0 1px 2px #00000014}.quality input[type=range]{width:160px;vertical-align:middle;accent-color:var(--accent)}.quality .qv{font-variant-numeric:tabular-nums;margin-left:8px;color:var(--muted);font-size:14px}.summary{margin-top:16px;color:var(--muted);font-size:14px;min-height:20px}.conv-list{display:grid;gap:8px;margin-top:6px}.conv-card{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:var(--surface)}.conv-thumb{width:44px;height:44px;border-radius:8px;background:#eef1f7;display:flex;align-items:center;justify-content:center;overflow:hidden;flex:0 0 auto;font-size:20px}.conv-thumb img{width:100%;height:100%;object-fit:cover}.conv-body{min-width:0;flex:1}.conv-name{font-weight:600;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conv-meta{color:var(--muted);font-size:13px}.conv-side{display:flex;align-items:center;gap:10px;flex:0 0 auto}.conv-badge{font-size:12px;font-weight:600;padding:3px 9px;border-radius:999px;background:#eef1f7;color:var(--muted)}.conv-badge.is-working{background:#fff5e6;color:var(--warn)}.conv-badge.is-done{background:#e6f6ee;color:var(--ok)}.conv-badge.is-error{background:#fdecea;color:var(--err)}.conv-dl{font-size:14px;font-weight:600}.actions{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}.btn{border:1px solid var(--line);background:var(--surface);color:var(--ink);padding:10px 16px;border-radius:10px;font-weight:600;font-size:15px;cursor:pointer}.btn:hover{border-color:#c4ccdb}.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.prose{margin:30px 0}.prose h2{font-size:23px;margin:30px 0 8px;letter-spacing:-.01em}.prose p{color:#36405a;margin:8px 0}.privacy-note{display:inline-flex;align-items:center;gap:8px;background:#e6f6ee;color:#136c41;border-radius:999px;padding:6px 14px;font-size:14px;font-weight:600;margin-top:14px}.faq details{border:1px solid var(--line);border-radius:10px;padding:4px 14px;margin:8px 0;background:var(--surface)}.faq summary{cursor:pointer;font-weight:600;padding:8px 0}.faq p{color:#36405a;margin:0 0 12px}.tile-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px;margin:14px 0}.tile{border:1px solid var(--line);border-radius:10px;padding:12px 14px;background:var(--surface);font-weight:600;color:var(--ink)}.tile:hover{border-color:var(--accent);text-decoration:none}.tile span{display:block;font-size:13px;font-weight:500;color:var(--muted)}.ad-slot{margin:24px 0;min-height:90px;display:flex;align-items:center;justify-content:center}.breadcrumb{font-size:14px;color:var(--muted);padding-top:18px}