*{box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;max-width:800px;margin:0 auto;padding:40px 20px;background:#f5f5f5;min-height:100vh}h1{color:#333;margin-bottom:8px}.subtitle{color:#666;margin-bottom:32px}.form-group{background:#fff;padding:24px;border-radius:8px;box-shadow:0 2px 4px #0000001a;margin-bottom:24px}label{display:block;font-weight:500;margin-bottom:8px;color:#333}.input-row{display:flex;gap:12px}input[type=url]{flex:1;padding:12px 16px;font-size:16px;border:2px solid #ddd;border-radius:6px;transition:border-color .2s}input[type=url]:focus{outline:none;border-color:#06c}button{background:#06c;color:#fff;border:none;padding:12px 24px;font-size:16px;border-radius:6px;cursor:pointer;transition:background .2s}button:hover{background:#0052a3}button:disabled{background:#999;cursor:not-allowed}.status{padding:16px;border-radius:6px;margin-bottom:24px;display:none}.status.loading{display:block;background:#e3f2fd;color:#1565c0}.status.error{display:block;background:#ffebee;color:#c62828}.status.success{display:block;background:#e8f5e9;color:#2e7d32}.download-btn{background:#28a745;margin-left:12px;padding:8px 16px;font-size:14px;vertical-align:middle}.download-btn:hover{background:#218838}.pdf-viewer{width:100%;height:80vh;border:1px solid #ddd;border-radius:6px;background:#fff;display:none}.pdf-viewer.visible{display:block}.spinner{display:inline-block;width:16px;height:16px;border:2px solid #1565c0;border-top-color:transparent;border-radius:50%;animation:spin 1s linear infinite;margin-right:8px;vertical-align:middle}@keyframes spin{to{transform:rotate(360deg)}}