.min-vh-100 {
    min-height: calc(100vh - 76px);
}

.card {
    border: none;
    border-radius: 16px;
}

.form-helper {
    font-size: 0.875rem;
    color: #6c757d;
    margin-top: 0.5rem;
    transition: all 0.3s ease;
}

.form-control.is-invalid {
    border-color: #dc3545;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

.form-control.is-valid {
    border-color: #28a745;
    box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.25);
}

.alert {
    border-radius: 12px;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}