#copyright {
    background-color: skyblue;
    text-align: center;
    width: 80%;
    margin-left: auto;
    margin-right: auto;
    height:5em;
    margin-bottom: 20px;
}
#copyright div {
    display: flex;
    align-items: center;
    width: 100%;
    height: 100%;
}
#prevArrow, #nextArrow {
    height: 100%;
    display: flex;
    width: 30px;
    align-items: center;
}
#prevArrow span {
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 12px solid #333;
    transform: rotate(-90deg);
}

#nextArrow span {
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 12px solid #333;
    transform: rotate(90deg);
    margin-left: auto;
    
}

#nextArrow, #prevArrow {
    outline: 1px rgba(0.5, 0.5, 0.5, 0.2) dashed;
    
}
#demostrate {
    display: flex;
    align-items: center;
    width: 70%;
    aspect-ratio: calc(10/11);
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    margin-top: 5px;
}
#container {
    display: inline-block;
    width: calc(100%); 
    height: 100%;
    overflow: hidden;
    position: relative;
}

.data {
    width: 100%;
    height: 100%;
    display: inline-block;
    position: absolute;
    top: 0;
    left: 0;
    overflow: hidden;
}

#bg {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: inline-block;
    z-index: -1;
    filter: blur(5px);
}

#comments {
    width: 70%;
    min-width: 200px;
    height: 10px;
    margin-left: auto;
    margin-right: auto;
    list-style-type: none;
    padding: 0;
    box-sizing: border-box;
}

@media (max-width: 768px) {
    #copyright {
        width: 95%;
        height: 4em;
    }
    #demostrate {
        width: 95%;
    }
    #comments {
        width: 95%;
    }
    #prevArrow, #nextArrow {
        width: 36px;
    }
}