.next-post-button {
    background: linear-gradient(135deg, #77BFA3, #A3D9A5);
    border: none;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    border-radius: 5px;
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    animation: moveUpDown 1s infinite;
    z-index: 9999;
}

.next-post-button a {
    color: white !important;
    text-decoration: none;
    transition: color 0.3s ease;
}

.next-post-button:hover {
    background: linear-gradient(135deg, #1b3a4b, #77BFA3);
}

@keyframes moveUpDown {
    0% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-10px);
    }
    100% {
        transform: translateX(-50%) translateY(0);
    }
}