*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;padding:20px}.container{max-width:900px;margin:0 auto}.header{text-align:center;color:#fff;margin-bottom:30px}.header h1{font-size:2.5rem;margin-bottom:10px}.header p{font-size:1.1rem;opacity:.9}.card{background:#fff;border-radius:12px;padding:30px;margin-bottom:20px;box-shadow:0 10px 30px #0003}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;font-weight:600;color:#333}.form-group input,.form-group textarea{width:100%;padding:12px;border:2px solid #e0e0e0;border-radius:8px;font-size:1rem;transition:border-color .3s}.form-group input:focus,.form-group textarea:focus{outline:none;border-color:#667eea}.form-group textarea{min-height:120px;resize:vertical;font-family:inherit}.btn{padding:12px 24px;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s;margin-right:10px}.btn-primary{background:#667eea;color:#fff}.btn-primary:hover:not(:disabled){background:#5568d3;transform:translateY(-2px);box-shadow:0 5px 15px #667eea66}.btn-success{background:#48bb78;color:#fff}.btn-success:hover:not(:disabled){background:#38a169;transform:translateY(-2px);box-shadow:0 5px 15px #48bb7866}.btn:disabled{opacity:.6;cursor:not-allowed}.alert{padding:15px;border-radius:8px;margin-bottom:20px}.alert-success{background:#c6f6d5;border:1px solid #48bb78;color:#22543d}.alert-error{background:#fed7d7;border:1px solid #f56565;color:#742a2a}.alert-info{background:#bee3f8;border:1px solid #4299e1;color:#2c5282}.loading{display:inline-block;width:20px;height:20px;border:3px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin 1s ease-in-out infinite;margin-right:10px}@keyframes spin{to{transform:rotate(360deg)}}.document-info{background:#f7fafc;padding:15px;border-radius:8px;margin-bottom:20px}.document-info h3{margin-bottom:10px;color:#2d3748}.document-info p{margin:5px 0;color:#4a5568}.signature-result{background:#f0fff4;border:2px solid #48bb78;padding:20px;border-radius:8px;margin-top:20px}.signature-result h3{color:#22543d;margin-bottom:15px}.signature-data{background:#fff;padding:15px;border-radius:6px;font-family:Courier New,monospace;font-size:.9rem;word-break:break-all;max-height:300px;overflow-y:auto}.certificate-info{background:#fff;padding:15px;border-radius:6px;margin-top:10px}.certificate-info p{margin:5px 0;color:#2d3748}.certificate-info strong{color:#1a202c}