.login-button {
    padding: 16px 40px;
    font-size: 1.1em;
    border: none;
    border-radius: 10px;
    background: linear-gradient(-45deg, #0078d4, #005ea2, #00457a, #0078d4);
    background-size: 400% 400%;
    color: white;
    cursor: pointer;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    animation: gradientShift 6s ease infinite;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.login-button:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.4);
}

.ms-icon {
    transition: transform 0.3s ease;
}

.login-button:hover .ms-icon {
    transform: rotate(10deg) scale(1.1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.8s ease-in-out;
}

@media (max-width: 600px) {
    .login-button {
        width: 90%;
        font-size: 1em;
        padding: 14px 0;
        justify-content: center;
    }
}