#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #ffffff; 
    z-index: 9999; 
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease-out, visibility 0.5s ease-out;
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

#main-content {
    opacity: 0; 
    transition: opacity 0.5s ease-in;
}

#main-content.loaded {
    opacity: 1; 
}

.preloader-logo {
    max-width: 150px; 
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05); /* Sedikit membesar */
        opacity: 0.8;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}