html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    width: 100%;
    overflow-x: hidden;
    font-family: 'Segoe UI', sans-serif;
    background-color: #f8f9fa;
}

/* Outer container scrollable if content overflows */
.container-fluid {
    min-height: 100vh;
    max-height: 100vh;
    overflow-y: auto;
    padding-top: 2rem;
    padding-bottom: 2rem;
    box-sizing: border-box;
}

/* Card remains fixed width in center */
.card {
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
    background-color: #fff;
    margin: auto;
}

/* Form padding */
.register-card-body {
    padding: 2rem;
}

/* Error message box scrolls if overflow */
.alert.alert-danger {
    max-height: 150px;
    overflow-y: auto;
    font-size: 0.9rem;
    margin-top: 1rem;
}

/* Button margin to avoid hiding */
form .d-flex.justify-content-center {
    margin-top: 1.5rem;
}

/* Responsive tweaks */
@media (max-width: 768px) {
    .register-card-body {
        padding: 1.5rem;
    }

    .card {
        margin: 1rem auto;
        width: 95%;
    }
}

@media (max-width: 576px) {
    .register-card-body {
        padding: 1rem;
    }

    .card {
        margin: 1rem auto;
        width: 98%;
    }
}