*{box-sizing:border-box}*,body{margin:0;padding:0}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;background-color:#f9f9f9;color:#333}a{color:#007bff;text-decoration:none;transition:color .2s ease-in-out}a:hover{color:#0056b3}h1,h2,h3,h4,h5,h6{font-weight:600}h1,h2,h3,h4,h5,h6,p{margin-bottom:1rem}button{font-family:inherit;font-size:1rem;padding:10px 15px;border:none;border-radius:5px;cursor:pointer;transition:all .2s ease-in-out}button:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 8px rgba(0,0,0,.15)}button:disabled{cursor:not-allowed;opacity:.6}.container{max-width:1200px;margin:0 auto;padding:20px}.card{background:#fff;border-radius:12px;box-shadow:0 4px 6px rgba(0,0,0,.1);padding:2rem;margin-bottom:20px;border:1px solid #e5e7eb}.card h1{font-size:2rem;margin-bottom:1rem;color:#1f2937}.card p{font-size:1.1rem;color:#6b7280;line-height:1.7}.download-link{display:inline-block;padding:12px 24px;background:#28a745;color:#fff;border-radius:8px;text-decoration:none;font-weight:600;transition:all .2s ease-in-out;box-shadow:0 2px 4px rgba(0,0,0,.1)}.download-link:hover{background:#218838;transform:translateY(-1px);box-shadow:0 4px 8px rgba(0,0,0,.15)}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.loading{display:inline-block;width:20px;height:20px;border:3px solid #f3f3f3;border-top-color:#3498db;border-radius:50%;animation:spin 1s linear infinite;margin-right:8px}.file-upload-area{border:2px dashed #d1d5db;border-radius:8px;padding:2rem;text-align:center;background:#f9fafb;transition:all .2s ease-in-out;cursor:pointer}.file-upload-area:hover{border-color:#3b82f6;background:#f0f9ff}.file-upload-area.dragover{border-color:#3b82f6;background:#dbeafe}@media (max-width:768px){.container{padding:10px}.card{padding:1.5rem}.card h1{font-size:1.5rem}.card p{font-size:1rem}}