.invalid-page-container{display:flex;align-items:center;justify-content:center;height:100vh;background-color:#f8f9fa;text-align:center}.invalid-content{background:white;padding:30px;border-radius:10px;box-shadow:0 4px 10px rgba(0,0,0,.1);max-width:400px;width:100%}.invalid-heading{font-size:24px;font-weight:700;color:#dc3545}.invalid-text{font-size:16px;color:#555;margin:15px 0}.invalid-btn{background-color:#007bff;color:white;border:none;padding:10px 20px;font-size:16px;border-radius:5px;cursor:pointer;transition:.3s ease}.invalid-btn:hover{background-color:#0056b3}