.reference {
    padding-bottom: 0px;
    height: 1000px;
}

.reference img {
    width: 100%;
    height: 100%;
    opacity: 100%;
    object-fit: cover;
}

.reference > h2{
    padding-top: 6%;
    padding-left: 50%;
    transform: translateX(-11%);
    position: absolute;
}

.hi-slide {
    display: flex;
    justify-content: space-evenly;
    width: 100%;
    height: 500px;
    position: absolute;
    padding-top: 13%;
}

.hi-slide .hi-next,
.hi-slide .hi-prev {
    align-self:center;
    width: 40px;
    height: 40px;
    border-radius: 50px;
    line-height: 40px;
    text-align: center;
    cursor: pointer;
    background-color: rgba(255, 255, 255, 0.397);
    color: black;
    transition: all 0.7s;
    font-size: 30px;
    font-weight: bold;
    z-index: 1;
}

.hi-slide .hi-next:hover,
.hi-slide .h1-prev:hover {
    opacity: 1;
    background-color: aliceblue;
}

.hi-slide .hi-prev::before {
    content: '<';
    font-weight: 700;
    color: var(--color-darkgreen);
}

.hi-slide .hi-next::before {
    content: '>';
    font-weight: 700;
    color: var(--color-darkgreen);
}

.hi-slide > ul {
    list-style: none;
    width: 820px;
    margin: 0;
    padding: 0;
    cursor: pointer;
    transform: scale(1);
    transition: all 0.5s;
}

.hi-slide > ul > li {
    position: absolute; 
    z-index: 0; 
    width: 0; 
    height: 0; 
    margin: 0; 
    padding: 0;
    background-color: #333; 
    cursor: pointer;
    box-shadow: 5px 6px 20px 2px rgba(0, 0, 0, 0.8); 
    
}

.hi-slide > ul > li img{
    width: 100%;
    height: 100%;
    background-position: 100%;
}

.desc {
    display: none;
    padding: 10px;
    color: black;
    text-align: center;
    border-radius: 10px;
}

[style^="z-index: 4;"] > span{ 
    display: block;
}   

.background {
    position: absolute;
    margin-top: 5%;
    left: 10%;
    width: 80%;
    height: 800px;
    background-color: rgba(230, 230, 230, 0.7);
    transition: all 1s;
}

@media screen and (max-width: 1650px) {
    .background {
        margin-top: 5%;
        left: 5%;
        width: 90%;
        height: 750px;
    }

    .reference {
        height: 900px;
    }
}

@media screen and (max-width: 1000px) {
    .reference{
        height: 700px;

    }
    .hi-slide ul{
        left:50%;
        transform: scale(0.7) translateX(-15%);
    }

    .hi-slide {
        height: 300px;
    }
    
    .desc {
        transform: scale(1.2);
    }

    .reference > h2{
        padding-top: 7%;
        transform: translateX(-130px);
    }
    
    .background {
        margin-top: 5%;
        left: 5%;
        width: 90%;
        height: 600px;
    }
}

@media screen and (max-width: 750px) {
    .hi-slide ul{
        transform: scale(0.55) translateX(-160px);
    }

    .hi-slide {
        height: 230px;
    }

    .reference {
        height: 510px;
    }
    
    .desc {
        transform: scale(1.7);
        margin-top: 20px;
    }

    .background {
        height: 450px;
    }
} 

@media screen and (max-width: 650px) {
    .hi-slide ul{
        transform: scale(0.45) translateX(-200px);
    }

    .hi-slide {
        height: 230px;
    }

    .reference {
        height: 460px;
    }
    
    .reference > h2{
        padding-top: 8%;
        transform: translateX(-90px);
    }

    .background {
        height: 400px;
    }
}