.bg-gradient-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.min-vh-100 {
    min-height: 100vh;
}

.btn-floating {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.demo-card {
    cursor: pointer;
    transition: all 0.3s ease;
}

.demo-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.form-helper {
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.form-outline {
    margin-bottom: 1rem;
}

/* Custom validation styles */
.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: #198754;
    box-shadow: 0 0 0 0.2rem rgba(25, 135, 84, 0.25);
}

/* Smooth animations */
.alert {
    animation: slideDown 0.3s ease-out;
}

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