:root{--bg:#f5f9ff;--surface:#fff;--surface-soft:#edf5ff;--text:#101827;--muted:#64748b;--border:#d8e5f7;--strong-border:#a9c7f1;--primary:#1268f3;--primary-strong:#0b4db7;--secondary:#12b4d8;--danger:#c24135;--shadow:0 24px 70px #1f52a024;--radius:8px;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{background:radial-gradient(circle at top left, #1268f329, transparent 320px), linear-gradient(180deg, #1268f314, transparent 320px), var(--bg);min-width:320px;margin:0}button,input{font:inherit}button{border:0}button:disabled{cursor:not-allowed;opacity:.5}.app{place-items:center;min-height:100svh;padding:24px;display:grid}.shell{border:1px solid var(--border);border-radius:var(--radius);width:min(640px,100%);box-shadow:var(--shadow);background:#ffffffe6;padding:24px}.hero{align-items:center;gap:14px;margin-bottom:24px;display:flex}.brand-mark{color:#dbeafe;background:#0a1d3f;border-radius:8px;flex:none;place-items:center;width:48px;height:48px;display:grid}h1,p{margin:0}h1{font-size:30px;font-weight:780;line-height:1.05}.hero p,.link-field span,.quality-panel summary strong,.preset-grid span,.custom-controls label,.toggle,.status-label{color:var(--muted)}.hero p{margin-top:5px;font-size:14px}.link-field{gap:8px;display:grid}.link-field span{text-transform:uppercase;font-size:13px;font-weight:760}.link-field input{border:1px solid var(--border);border-radius:var(--radius);width:100%;min-height:56px;color:var(--text);background:#fbfdff;outline:none;padding:0 14px}.link-field input:focus,button:focus-visible,input[type=range]:focus-visible{outline-offset:2px;outline:3px solid #1268f338}.quality-panel{border:1px solid var(--border);border-radius:var(--radius);background:#fbfdff;margin-top:14px}.quality-panel summary{cursor:pointer;justify-content:space-between;align-items:center;gap:14px;min-height:54px;padding:0 14px;list-style:none;display:flex}.quality-panel summary::-webkit-details-marker{display:none}.quality-panel summary span{color:var(--primary-strong);align-items:center;gap:8px;font-weight:760;display:inline-flex}.quality-panel summary strong{text-align:right;font-size:13px}.preset-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;padding:0 14px 14px;display:grid}.preset-grid button{border:1px solid var(--border);text-align:left;min-height:58px;color:var(--muted);cursor:pointer;background:#fff;border-radius:6px;padding:10px}.preset-grid button.active{color:#0b367d;background:#eaf2ff;border-color:#8bb8f7}.preset-grid strong,.preset-grid span{display:block}.preset-grid strong{font-size:13px}.preset-grid span{margin-top:3px;font-size:12px}.custom-controls{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding:0 14px 14px;display:grid}.custom-controls label,.toggle{font-size:13px;font-weight:700}.custom-controls input{width:100%;accent-color:var(--primary)}.custom-controls span{color:var(--text);margin-top:3px;display:block}.toggle{align-items:center;gap:8px;padding:0 14px 14px;display:flex}.toggle input{accent-color:var(--primary)}.primary-action{border-radius:var(--radius);color:#fff;background:var(--primary);cursor:pointer;justify-content:center;align-items:center;gap:10px;width:100%;min-height:54px;margin-top:14px;font-weight:780;display:inline-flex;box-shadow:0 14px 30px #1268f33d}.status-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface-soft);justify-content:space-between;align-items:center;gap:12px;margin-top:14px;padding:14px;display:flex}.status-card p{margin-top:3px;font-size:14px}.status-card strong{color:var(--primary-strong)}.status-label{text-transform:uppercase;font-size:12px;font-weight:780}.spin{animation:.85s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (width<=680px){.app{place-items:center;padding:12px}.shell{padding:18px}.hero{align-items:flex-start}h1{font-size:26px}.quality-panel summary{padding-block:12px;display:grid}.quality-panel summary strong{text-align:left}.preset-grid,.custom-controls{grid-template-columns:1fr}.status-card{align-items:flex-start}}