.container-main-login {
    background-image: url("/image/banner.png");
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center center;
    background-attachment: fixed;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.card {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(6px);
    border: none;
    border-radius: 16px;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.15);
}

.btn-primary {
    background-color: #4b49ac;
    border-color: #4b49ac;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: #3b38a1;
    border-color: #3b38a1;
}

.card img {
    max-width: 140px;
    margin: 10px auto;
}