:root{color:#1f2933;background:#f5f7f8;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;line-height:1.5;text-rendering:optimizeLegibility}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;min-width:320px}button,textarea{font:inherit}button{border:1px solid #c8d1d8;border-radius:8px;background:#fff;color:#1f2933;cursor:pointer;font-weight:700;min-height:42px;padding:0 16px}button:disabled{cursor:not-allowed;opacity:.45}.primary-button{background:#23845f;border-color:#23845f;color:#fff}.secondary-button{background:#1f2933;border-color:#1f2933;color:#fff}.app-shell{display:grid;min-height:100vh;padding:24px;place-items:center}.step-screen{width:min(100%,960px)}.upload-screen{display:grid;gap:16px;place-items:center;text-align:center;width:min(100%,720px)}.drop-zone{align-items:center;background:#fff;border:2px dashed #9fb1bd;border-radius:8px;display:flex;flex-direction:column;justify-content:center;min-height:240px;outline:none;padding:clamp(28px,6vw,48px);text-align:center;transition:border-color .12s ease,background .12s ease,transform .12s ease;width:100%}.drop-zone.is-dragging,.drop-zone:focus-visible{background:#eef8f2;border-color:#23845f;transform:translateY(-1px)}h1{font-size:clamp(3rem,9vw,6rem);line-height:.95;margin:0}.app-description{color:#52616b;font-size:1.05rem;margin:-6px 0 12px}.drop-zone p{color:#52616b;margin:10px 0 0;max-width:440px}.drop-select-button{background:transparent;border:0;color:#1f2933;font-size:clamp(1.4rem,4vw,2rem);font-weight:900;min-height:auto;padding:0}.selected-file{color:#1f2933;font-weight:800;margin:14px 0 0;overflow-wrap:anywhere}.start-button{min-width:180px}.converting-screen{display:grid;gap:14px;width:min(100%,720px)}.loading-panel,.error-panel{background:#fff;border-radius:8px;padding:clamp(20px,4vw,32px)}.loading-panel{border:1px solid #d9e1e7}.progress-heading{align-items:center;display:flex;gap:14px}.spinner{animation:spin .9s linear infinite;border:4px solid #d9e1e7;border-top-color:#23845f;border-radius:50%;flex:0 0 auto;height:40px;width:40px}.loading-panel p{font-size:1.1rem;font-weight:800;margin:0}.loading-panel.is-complete .spinner,.loading-panel.is-error .spinner{animation:none;border-color:#23845f}.loading-panel.is-error .spinner{border-color:#d14d2c}.progress-list{color:#52616b;display:grid;gap:8px;margin:18px 0;padding-left:22px}.progress-list li::marker{color:#23845f;font-weight:900}.progress-list li.is-complete{color:#1b6b4e;font-weight:800}.progress-list li.is-error{color:#9a3412;font-weight:800}.ad-slot{align-items:center;background:#edf1f4;border:1px solid #d2dbe1;border-radius:8px;color:#52616b;display:flex;font-weight:700;justify-content:center;min-height:140px}.error-panel{background:#fff3f0;border:1px solid #f0b8aa;color:#9a3412}.result-screen{display:flex;flex-direction:column;gap:12px;min-height:calc(100vh - 48px);width:min(100%,1120px)}.result-toolbar{display:flex;flex-wrap:wrap;gap:8px;justify-content:flex-end}#markdownOutput{background:#0f1720;border:0;border-radius:8px;color:#edf7f4;flex:1;min-height:480px;outline:none;padding:16px;resize:none;width:100%}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:680px){.app-shell{padding:16px}.drop-zone{min-height:220px}.progress-heading{align-items:flex-start}.result-screen{min-height:calc(100vh - 32px)}.result-toolbar button{flex:1 1 150px}}