:root{--text:#4b5563;--text-h:#111827;--bg:#f9fafb;--card-bg:#fff;--border:#e5e7eb;--accent:#1d4ed8;--accent-hover:#1e40af;--accent-light:#eff6ff;--step-bg:#1d4ed8;--step-text:#fff;--disabled-bg:#f3f4f6;--disabled-text:#9ca3af;--success:#059669;--error:#dc2626;--sans:system-ui, "Segoe UI", Roboto, sans-serif;font:16px/1.6 var(--sans);color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#111827;--card-bg:#1f2937;--border:#374151;--accent:#60a5fa;--accent-hover:#93c5fd;--accent-light:#1e3a5f;--step-bg:#3b82f6;--step-text:#fff;--disabled-bg:#1f2937;--disabled-text:#6b7280;--success:#34d399;--error:#f87171}}*,:before,:after{box-sizing:border-box}body{min-height:100svh;margin:0}header{background:var(--card-bg);border-bottom:1px solid var(--border);text-align:center;padding:24px 0}header h1{color:var(--text-h);letter-spacing:-.5px;margin:0 0 4px;font-size:28px;font-weight:700}header p{color:var(--text);margin:0;font-size:15px}main{flex-direction:column;gap:16px;max-width:720px;margin:32px auto;padding:0 16px 64px;display:flex}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;padding:28px 32px}.card[aria-disabled=true]{opacity:.5;pointer-events:none}.card h2{color:var(--text-h);align-items:center;gap:10px;margin:0 0 12px;font-size:17px;font-weight:600;display:flex}.step{background:var(--step-bg);width:26px;height:26px;color:var(--step-text);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;font-weight:700;display:inline-flex}.helper-text{color:var(--text);margin:8px 0 0;font-size:13px}.helper-text a{color:var(--accent);text-decoration:none}.helper-text a:hover{text-decoration:underline}.status-text{min-height:20px;margin:8px 0 0;font-size:14px}.status-text.success{color:var(--success)}.status-text.error{color:var(--error)}.api-key-row{align-items:center;gap:8px;margin-top:12px;display:flex}.api-key-row input{border:1px solid var(--border);background:var(--bg);color:var(--text-h);border-radius:8px;outline:none;flex:1;padding:9px 12px;font-family:ui-monospace,monospace;font-size:14px;transition:border-color .15s}.api-key-row input:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb, var(--accent) 15%, transparent)}.btn-primary,.btn-ghost{cursor:pointer;white-space:nowrap;border:none;border-radius:8px;padding:9px 18px;font-size:14px;font-weight:600;transition:background .15s,opacity .15s}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-ghost{color:var(--text);border:1px solid var(--border);background:0 0}.btn-ghost:hover{background:var(--bg)}#drop-zone{border:2px dashed var(--border);cursor:pointer;text-align:center;border-radius:10px;flex-direction:column;justify-content:center;align-items:center;gap:8px;margin-top:12px;padding:36px 24px;transition:background .15s,border-color .15s;display:flex}#drop-zone:hover,#drop-zone.dragging{background:var(--accent-light);border-color:var(--accent)}#drop-zone p{color:var(--text);margin:0;font-size:14px}.drop-icon{font-size:32px}#pdf-input{display:none}.progress-inner{align-items:center;gap:16px;padding:4px 0;display:flex}.spinner{border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;flex-shrink:0;width:24px;height:24px;animation:.7s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.preview-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;display:flex}.preview-header h2{margin:0}.preview-actions{gap:8px;display:flex}#preview-area{border:1px solid var(--border);min-height:200px;color:var(--text-h);background:var(--bg);cursor:text;border-radius:8px;outline:none;padding:24px 28px;font-size:15px;line-height:1.7;transition:border-color .15s}#preview-area:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb, var(--accent) 10%, transparent)}#preview-area h1{color:var(--text-h);margin:0 0 .5em;font-size:1.6em;font-weight:700}#preview-area h2{color:var(--text-h);margin:1.25em 0 .4em;font-size:1.3em;font-weight:700}#preview-area h3{color:var(--text-h);margin:1em 0 .3em;font-size:1.1em;font-weight:600}#preview-area p{margin:0 0 .75em}#preview-area ul,#preview-area ol{margin:0 0 .75em;padding-left:1.5em}#preview-area li{margin:0 0 .25em}#preview-area table{border-collapse:collapse;width:100%;margin:0 0 1em;font-size:14px}#preview-area th{background:var(--accent-light);text-align:left;font-weight:600}#preview-area th,#preview-area td{border:1px solid var(--border);padding:8px 12px}#preview-area tr:nth-child(2n) td{background:var(--bg)}#preview-area a{color:var(--accent)}#preview-area strong{color:var(--text-h)}#toast{background:var(--text-h);color:var(--card-bg);opacity:0;pointer-events:none;z-index:1000;border-radius:8px;padding:10px 18px;font-size:14px;font-weight:500;transition:opacity .2s,transform .2s;position:fixed;bottom:24px;right:24px;transform:translateY(8px)}#toast.show{opacity:1;transform:translateY(0)}