style.css

body{
    margin: 0;
    background-color: #000;
    color: #eee;
    font-family: Poppins;
    font-size: 12px;
}
a{
    text-decoration: none;
}
:root{
    --width-pc: 1140px;
    --width-thumbnail: 150px;
    --height-thumbnail: 220px;
}
header{
    width: var(--width-pc);
    max-width: 80%;
    margin: auto;
    height: 50px;
    display: flex;
    align-items: center;
    position: relative;
    z-index: 100;
}
header a{
    color: #eee;
    margin-right: 40px;
}
/* carousel */
.carousel{
    height: 100vh;
    margin-top: -50px;
    width: 100vw;
    overflow: hidden;
    position: relative;
}
.carousel .list .item{
    width: 100%;
    height: 100%;
    position: absolute;
    inset: 0 0 0 0;
}
.carousel .list .item img{
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.carousel .list .item .content{
    position: absolute;
    top: 20%;
    width: var(--width-pc);
    max-width: 80%;
    left: 50%;
    transform: translateX(-50%);
    padding-right: 30%;
    box-sizing: border-box;
    color: #fff;
    text-shadow: 0 5px 10px #0004;
}
.carousel .list .item .author{
    font-weight: bold;
    letter-spacing: 10px;
}
.carousel .list .item .title,
.carousel .list .item .topic{
    font-size: 5em;
    font-weight: bold;
    line-height: 1.3em;
}
.carousel .list .item .topic{
    color: #f1683a;
}
.carousel .list .item .buttons{
    display: grid;
    grid-template-columns: repeat(2, 130px);
    grid-template-rows: 40px;
    gap: 5px;
    margin-top: 20px;
}
.carousel .list .item .buttons button{
    border: none;
    background-color: #eee;
    letter-spacing: 3px;
    font-family: Poppins;
    font-weight: 500;
}
.carousel .list .item .buttons button:nth-child(2){
    background-color: transparent;
    border: 1px solid #fff;
    color: #eee;
}
/* thumbail */
.thumbnail{
    position: absolute;
    bottom: 50px;
    left: 50%;
    width: 50%;
    height: var(--height-thumbnail);
    z-index: 100;
    overflow: hidden;
}
.listThumbnail{
    width: max-content;
    display: flex;
    gap: 20px;
    position: absolute;
    transition: left 1.5s;

}
.thumbnail .item{
    width:  190px;
    height:  250px;
    flex-shrink: 0;
    position: relative;
}
.thumbnail .item img{
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}
.thumbnail .item .content{
    color: #fff;
    position: absolute;
    bottom: 10px;
    left: 10px;
    right: 10px;
}
.thumbnail .item .content .title{
    font-weight: 500;
}
.thumbnail .item .content .description{
    font-weight: 300;
}


/* arrows */
.arrows{
    position: absolute;
    top: 80%;
    right: 52%;
    z-index: 100;
    width: 300px;
    max-width: 30%;
    display: flex;
    gap: 10px;
    align-items: center;
}
.arrows button{
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #eee4;
    border: none;
    color: #fff;
    font-family: monospace;
    font-weight: bold;
    transition: .5s;
}
.arrows button:hover{
    background-color: #fff;
    color: #000;
}

/* animation */
.carousel .list .item:nth-child(1){
    z-index: 1;
}

/* animation text in first item */

.carousel .list .item:nth-child(1) .content .author,
.carousel .list .item:nth-child(1) .content .title,
.carousel .list .item:nth-child(1) .content .topic,
.carousel .list .item:nth-child(1) .content .des,
.carousel .list .item:nth-child(1) .content .buttons
{
    transform: translateY(50px);
    filter: blur(20px);
    opacity: 0;
    animation: showContent .5s 1s linear 1 forwards;
}
@keyframes showContent{
    to{
        transform: translateY(0px);
        filter: blur(0px);
        opacity: 1;
    }
}
.carousel .list .item:nth-child(1) .content .title{
    animation-delay: 1.2s!important;
}
.carousel .list .item:nth-child(1) .content .topic{
    animation-delay: 1.4s!important;
}
.carousel .list .item:nth-child(1) .content .des{
    animation-delay: 1.6s!important;
}
.carousel .list .item:nth-child(1) .content .buttons{
    animation-delay: 1.8s!important;
}
/* create animation when next click */
.carousel.next .list .item:nth-child(1) img{
    width: var(--width-thumbnail);
    height: var(--height-thumbnail);
    position: absolute;
    bottom: 50px;
    left: 50%;
    border-radius: 30px;
    animation: showImage .5s linear 1 forwards;
}
@keyframes showImage{
    to{
        bottom: 0;
        left: 0;
        width: 100%;
        height: 100%;
        border-radius: 0;
    }
}

.carousel.next .listThumbnail .item:nth-last-child(1){
    overflow: hidden;
    animation: showThumbnail .5s linear 1 forwards;
}
.carousel.prev .list .item img{
    z-index: 100;
}
@keyframes showThumbnail{
    from{
        width: 0;
        opacity: 0;
    }
}
.carousel.next .listThumbnail{
    animation: effectNext .5s linear 1 forwards;
}

@keyframes effectNext{
    from{
        transform: translateX(var(--width-thumbnail));
    }
}

/* running time */

.carousel .time{
    position: absolute;
    z-index: 1000;
    width: 0%;
    height: 3px;
    background-color: #f1683a;
    left: 0;
    top: 0;
}

.carousel.next .time,
.carousel.prev .time{
    animation: runningTime 3s linear 1 forwards;
}
@keyframes runningTime{
    from{ width: 100%}
    to{width: 0}
}


/* prev click */

.carousel.prev .list .item:nth-child(2){
    z-index: 2;
}

.carousel.prev .list .item:nth-child(2) img{
    animation: outFrame 0.5s linear 1 forwards;
    position: absolute;
    bottom: 0;
    left: 0;
}
@keyframes outFrame{
    to{
        width: var(--width-thumbnail);
        height: var(--height-thumbnail);
        bottom: 50px;
        left: 50%;
        border-radius: 20px;
    }
}

.carousel.prev .listThumbnail .item:nth-child(1){
    overflow: hidden;
    opacity: 0;
    animation: showThumbnail .5s linear 1 forwards;
}
.carousel.next .arrows button,
.carousel.prev .arrows button{
    pointer-events: none;
}
.carousel.prev .list .item:nth-child(2) .content .author,
.carousel.prev .list .item:nth-child(2) .content .title,
.carousel.prev .list .item:nth-child(2) .content .topic,
.carousel.prev .list .item:nth-child(2) .content .des,
.carousel.prev .list .item:nth-child(2) .content .buttons
{
    animation: contentOut 1.5s linear 1 forwards!important;
}

@keyframes contentOut{
    to{
        transform: translateY(-50px);
        filter: blur(20px);
        opacity: 0;
    }
}
@media screen and (max-width: 678px) {
    .carousel .list .item .content{
        padding-right: 0;
    }
    .carousel .list .item .content .title{
        font-size: 30px;
    }
}