:root{--bg: #f5f5f4;--fg: #1a1a1a;--muted: #6b6b6b;--accent: #2563eb;--accent-fg: #ffffff;--border: #d4d4d4;--error: #b91c1c;--warning: #92400e;--card: #ffffff;--checker-a: #fafafa;--checker-b: #e7e7e7;--radius: 8px;--shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 4px 12px rgba(0, 0, 0, .05);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}@media (prefers-color-scheme: dark){:root{--bg: #0e0e0e;--fg: #f4f4f4;--muted: #a3a3a3;--accent: #3b82f6;--accent-fg: #ffffff;--border: #2a2a2a;--error: #f87171;--warning: #fbbf24;--card: #161616;--checker-a: #1d1d1d;--checker-b: #2a2a2a;--shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 4px 12px rgba(0, 0, 0, .4)}}*{box-sizing:border-box}body{margin:0;padding:0;background:var(--bg);color:var(--fg);min-height:100vh}.app{max-width:960px;margin:0 auto;padding:1.5rem 1rem 4rem}.header h1{margin:0;font-size:1.75rem;font-weight:600}.tagline{margin:.25rem 0 1.5rem;color:var(--muted)}.grid{display:grid;grid-template-columns:1fr;gap:1rem}@media (min-width: 720px){.grid{grid-template-columns:1fr 1fr}.grid>.card:first-child,.grid>.card:last-child{grid-column:span 1}}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;box-shadow:var(--shadow)}.card h2{margin:0 0 .75rem;font-size:1rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}.dropzone-wrap{display:flex;flex-direction:column;gap:.5rem}.dropzone{display:flex;align-items:center;justify-content:center;min-height:220px;border:2px dashed var(--border);border-radius:var(--radius);background:var(--bg);cursor:pointer;text-align:center;color:var(--muted);overflow:hidden;position:relative}.dropzone.disabled{cursor:not-allowed;opacity:.6}.dropzone .placeholder{padding:1.5rem;line-height:1.5}.dropzone .preview{max-width:100%;max-height:360px;display:block}.preview.checker{background-image:linear-gradient(45deg,var(--checker-a) 25%,transparent 25%),linear-gradient(-45deg,var(--checker-a) 25%,transparent 25%),linear-gradient(45deg,transparent 75%,var(--checker-a) 75%),linear-gradient(-45deg,transparent 75%,var(--checker-a) 75%);background-size:16px 16px;background-position:0 0,0 8px,8px -8px,-8px 0;background-color:var(--checker-b)}.filename{font-size:.85rem;color:var(--muted);margin:0}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.error{color:var(--error);margin:0;font-size:.9rem}.warning{color:var(--warning);margin:0;font-size:.9rem}button.primary,button.secondary{font:inherit;border:1px solid transparent;border-radius:6px;padding:.6rem 1rem;cursor:pointer;margin-top:.5rem;width:100%}button.primary{background:var(--accent);color:var(--accent-fg)}button.primary:disabled,button.secondary:disabled{opacity:.5;cursor:not-allowed}button.secondary{background:transparent;color:var(--fg);border-color:var(--border)}.advanced{margin-top:.75rem}.advanced summary{cursor:pointer;font-size:.85rem;color:var(--muted)}.model-toggle{display:flex;align-items:center;gap:.5rem;margin-top:.5rem}.model-toggle select{flex:1;font:inherit;padding:.35rem .5rem;border-radius:4px;border:1px solid var(--border);background:var(--bg);color:var(--fg)}.hint{font-size:.8rem;color:var(--muted);margin:.5rem 0 0}.watchdog{font-size:.85rem;color:var(--warning);margin:.5rem 0 0}.result{min-height:220px;display:flex;align-items:center;justify-content:center;text-align:center;border:1px solid var(--border);border-radius:var(--radius);padding:.5rem}.result.empty{color:var(--muted);font-size:.9rem;background:var(--bg)}.result.loading{flex-direction:column;gap:.75rem;color:var(--muted)}.result.done .preview{max-width:100%;max-height:360px}.result.error p{margin:.25rem 0}.result .caption{font-size:.8rem;color:var(--muted)}.spinner{width:28px;height:28px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.footer{margin-top:2rem;font-size:.85rem;color:var(--muted);text-align:center}