html,
body {
    height: 90%;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f8f9fa;
}

.form-signin {
    width: 100%;
    max-width: 400px;
    padding: 2rem 2rem 1.5rem 2rem;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}