:root{color-scheme:light;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;line-height:1.5;color:#10201f;background:#f6f8f7;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button,input{font:inherit}button{border:0}.app-shell{min-height:100vh;padding:28px;background:linear-gradient(135deg,rgba(15,118,110,.09),transparent 34%),linear-gradient(315deg,rgba(234,88,12,.08),transparent 42%),#f6f8f7}.workspace{width:min(1180px,100%);margin:0 auto}.topbar{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:24px}.eyebrow{margin:0 0 4px;color:#0f766e;font-size:.82rem;font-weight:800}h1{margin:0;font-size:clamp(2.2rem,7vw,5rem);line-height:.95;letter-spacing:0}.install-hint{display:inline-flex;align-items:center;justify-content:center;gap:6px;width:56px;height:56px;border-radius:8px;color:#f8fafc;background:#0f766e;font-size:.82rem;font-weight:900;box-shadow:0 12px 28px #0f766e38;cursor:pointer}.install-hint span{display:none}.tool-layout{display:grid;grid-template-columns:minmax(280px,360px) minmax(0,1fr);gap:18px;align-items:start}.control-panel{border:1px solid rgba(15,23,42,.08);border-radius:8px;background:#ffffffeb;box-shadow:0 18px 55px #0f172a14}.control-panel{position:sticky;top:24px;padding:16px}.drop-zone{display:grid;min-height:240px;place-items:center;padding:28px 20px;border:2px dashed #7bb9b2;border-radius:8px;color:#244946;background:#edf7f5;text-align:center;cursor:pointer;transition:border-color .18s ease,background .18s ease,transform .18s ease}.drop-zone:hover,.drop-zone.is-dragging{border-color:#0f766e;background:#dff2ef;transform:translateY(-1px)}.drop-zone input{position:absolute;inline-size:1px;block-size:1px;clip:rect(0 0 0 0);clip-path:inset(50%);overflow:hidden;white-space:nowrap}.drop-icon{display:grid;width:56px;height:56px;place-items:center;border-radius:50%;color:#fff;background:#0f766e}.drop-title{display:block;margin-top:14px;color:#0f2523;font-size:1.05rem;font-weight:800}.drop-copy{display:block;max-width:240px;margin-top:6px;color:#55716e;font-size:.92rem}.actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}.actions button,.download-button{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;border-radius:8px;color:#fff;background:#0f766e;font-weight:800;cursor:pointer}.actions .secondary{background:#f97316}.actions .ghost{grid-column:1 / -1;color:#244946;background:#e5eeec}.concurrency-control{display:grid;grid-template-columns:1fr auto;gap:8px 12px;align-items:center;margin-top:14px;padding:12px;border-radius:8px;background:#f4f7f6}.concurrency-control span{color:#45615d;font-size:.9rem;font-weight:800}.concurrency-control strong{color:#0f766e;font-size:1.05rem}.concurrency-control input{grid-column:1 / -1;width:100%;accent-color:#0f766e}button:disabled{cursor:not-allowed;opacity:.48}.stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:16px 0 0}.stats div{padding:12px;border-radius:8px;background:#f4f7f6}.stats dt{color:#6b7e7b;font-size:.78rem;font-weight:700}.stats dd{margin:2px 0 0;color:#10201f;font-size:1.35rem;font-weight:900}.message{margin:14px 2px 0;color:#3e5d59;font-size:.92rem}.file-panel{min-height:520px}.empty-state{display:grid;min-height:496px;place-items:center;align-content:center;padding:24px;border:1px solid rgba(15,23,42,.08);border-radius:8px;background:#ffffffc7;box-shadow:0 18px 55px #0f172a0f;color:#526966;text-align:center}.empty-state h2{margin:0 0 6px;color:#10201f;font-size:1.4rem}.empty-state p{max-width:360px;margin:0}.file-list{display:grid;gap:10px;padding:0;margin:0;list-style:none}.file-row{display:grid;grid-template-columns:72px minmax(0,1fr) auto;gap:14px;align-items:center;min-height:92px;padding:10px;border:1px solid rgba(15,23,42,.08);border-radius:8px;background:#fff}.thumb{display:grid;width:72px;height:72px;place-items:center;overflow:hidden;border-radius:8px;color:#0f766e;background:#e5f3f1;font-size:.78rem;font-weight:900}.thumb img{width:100%;height:100%;object-fit:cover}.file-main{min-width:0}.file-title{display:flex;align-items:center;gap:10px;min-width:0}.file-title strong{min-width:0;overflow:hidden;color:#10201f;text-overflow:ellipsis;white-space:nowrap}.status{flex:0 0 auto;padding:3px 8px;border-radius:999px;font-size:.75rem;font-weight:800}.status-queued{color:#46515f;background:#edf0f4}.status-converting{color:#8a4b0d;background:#ffedd5}.status-done{color:#0f766e;background:#dff2ef}.status-error{color:#b91c1c;background:#fee2e2}.file-meta{display:flex;flex-wrap:wrap;gap:6px 12px;margin-top:7px;color:#657773;font-size:.88rem}.error-text{margin:7px 0 0;color:#b91c1c;font-size:.86rem}.download-button{min-width:76px;padding:0 14px}@media(max-width:860px){.app-shell{padding:18px}.tool-layout{grid-template-columns:1fr}.control-panel{position:static}.drop-zone{min-height:200px}}@media(max-width:560px){.app-shell{padding:14px}.topbar{align-items:center}.install-hint{width:48px;height:48px}.file-row{grid-template-columns:56px minmax(0,1fr);gap:10px}.thumb{width:56px;height:56px}.download-button{grid-column:1 / -1;width:100%}}