Разработка 3D карусель с параллаксом при помощи GSAP

// ------------------ RESET ------------------
* { -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; }
html, body{ border:0; font-size:16px; line-height:1.5; margin:0; padding:0 }
a img{ border:0 }
// ------------------ FONT-FACE ------------------
@import url('https://fonts.googleapis.com/css?family=Neuton:200,400');
// ------------------ STYLES ------------------
#hero {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100vw;
    height: 100vh;
    padding: 50px;
    background: #1d1d1d;
    overflow: hidden;

    #carousel:hover #bg .inner .shield {
        transition: fill 0.2s linear;
    }
    
    &.stark {
        @shield:     #fdf6d6;
        @shieldH:     #fff;
        @txt1:         #7e817f;
        @txt1H:     #60aca8;
        @txt2:         #040707;
        
        #carousel #bg .inner .shield         {fill: @shield;}
        #carousel:hover #bg .inner .shield {fill: @shieldH;}
        #carousel .item .line-1             {color: @txt1;}
        #carousel:hover .item .line-1         {color: @txt1H;}
        #carousel .item .line-2             {color: @txt2;}
        #carousel .item .inner .img          {width: 110%;}
        #carousel .item .inner .img svg      {top: 0;}
    }
    
    &.lannister {
        @shield:     #a01830;
        @shieldH:     #9f001c;
        @txt1:         #f7e26a;
        @txt1H:     #ffc13c;
        @txt2:         #ffffff;
        
        #carousel #bg .inner .shield         {fill: @shield;}
        #carousel:hover #bg .inner .shield {fill: @shieldH;}
        #carousel .item .line-1             {color: @txt1;}
        #carousel:hover .item .line-1         {color: @txt1H;}
        #carousel .item .line-2             {color: @txt2;}
        #carousel .item .inner .img          {width: 73%;}
        #carousel .item .inner .img svg      {top: -20%;}
    }
    
    &.greyjoy {
        @shield:     #101006;
        @shieldH:     #1b2225;
        @txt1:         #f8d63c;
        @txt1H:     #fffa72;
        @txt2:         #ffffff;
        
        #carousel #bg .inner .shield         {fill: @shield;}
        #carousel:hover #bg .inner .shield {fill: @shieldH;}
        #carousel .item .line-1             {color: @txt1;}
        #carousel:hover .item .line-1         {color: @txt1H;}
        #carousel .item .line-2             {color: @txt2;}
        #carousel .item .inner .img          {width: 100%;}
        #carousel .item .inner .img svg      {top: -10%;}
    }
    
    &.targaryen {
        @shield:     #11120b;
        @shieldH:     #261a1a;
        @txt1:         #9f1c2e;
        @txt1H:     #ff0018;
        @txt2:         #fff;
        
        #carousel #bg .inner .shield         {fill: @shield;}
        #carousel:hover #bg .inner .shield {fill: @shieldH;}
        #carousel .item .line-1             {color: @txt1;}
        #carousel:hover .item .line-1         {color: @txt1H;}
        #carousel .item .line-2             {color: @txt2;}
        #carousel .item .inner .img          {width: 85%;}
        #carousel .item .inner .img svg      {top: -10%;}
    }
    
    &.tyrell {
        @shield:     #9bb693;
        @shieldH:     #5f8853;
        @txt1:         #fbd343;
        @txt1H:     #c7e82d;
        @txt2:         #040707;
        
        #carousel #bg .inner .shield         {fill: @shield;}
        #carousel:hover #bg .inner .shield {fill: @shieldH;}
        #carousel .item .line-1             {color: @txt1;}
        #carousel:hover .item .line-1         {color: @txt1H;}
        #carousel .item .line-2             {color: @txt2;}
        #carousel .item .inner .img          {width: 85%;}
        #carousel .item .inner .img svg      {top: -10%;}
    }
    
    &.tully {
        @shield:     #002b4b;
        @shieldH:     #00376a;
        @txt1:         #821528;
        @txt1H:     #9e0722;
        @txt2:         #fff;
        
        #carousel #bg .inner .shield         {fill: @shield;}
        #carousel:hover #bg .inner .shield {fill: @shieldH;}
        #carousel .item .line-1             {color: @txt1;}
        #carousel:hover .item .line-1         {color: @txt1H;}
        #carousel .item .line-2             {color: @txt2;}
        #carousel .item .inner .img          {width: 110%;}
        #carousel .item .inner .img svg      {top: 15%;}
    }
    
    &.martell {
        @shield:     #f38c01;
        @shieldH:     #f8bd1f;
        @txt1:         #872921;
        @txt1H:     #a13506;
        @txt2:         #fff;
        
        #carousel #bg .inner .shield         {fill: @shield;}
        #carousel:hover #bg .inner .shield {fill: @shieldH;}
        #carousel .item .line-1             {color: @txt1;}
        #carousel:hover .item .line-1         {color: @txt1H;}
        #carousel .item .line-2             {color: @txt2;}
        #carousel .item .inner .img          {width: 83%;}
        #carousel .item .inner .img svg      {top: -8%;}
    }
    
    &.arryn {
        @shield:     #002b4b;
        @shieldH:     #004461;
        @txt1:         #fbf4c8;
        @txt1H:     #fff;
        @txt2:         #fff;
        
        #carousel #bg .inner .shield         {fill: @shield;}
        #carousel:hover #bg .inner .shield {fill: @shieldH;}
        #carousel .item .line-1             {color: @txt1;}
        #carousel:hover .item .line-1         {color: @txt1H;}
        #carousel .item .line-2             {color: @txt2;}
        #carousel .item .inner .img          {width: 82%;}
        #carousel .item .inner .img svg      {top: -7%;}
    }
    
    &.baratheon {
        @shield:     #fcb600;
        @shieldH:     #ffce23;
        @txt1:         #5a4032;
        @txt1H:     #7e5805;
        @txt2:         #100a09;
        
        #carousel #bg .inner .shield         {fill: @shield;}
        #carousel:hover #bg .inner .shield {fill: @shieldH;}
        #carousel .item .line-1             {color: @txt1;}
        #carousel:hover .item .line-1         {color: @txt1H;}
        #carousel .item .line-2             {color: @txt2;}
        #carousel .item .inner .img          {width: 73%;}
        #carousel .item .inner .img svg      {top: -20%;}
    }

    #carousel-nav {
        position: absolute;
        z-index: 2;
        left: 50%;
        bottom: 50px;
        display: flex;
        flex-direction: row;
        justify-content: center;
        align-items: center;
        width: 100%;
        transform: translateX(-50%);
        
        button {
            display: block;
            width: 60px;
            margin: 0 15px;
            padding: 0;
            background: none;
            border-radius: 50%;
            border: none;
            cursor: pointer;
            opacity: 0.2;
            transition: opacity 0.2s linear;
            
            &:hover {
                opacity: 0.6;
            }

            &.active {
                opacity: 1;
            }
        }

        @media screen and (max-height: 800px){
            left: auto;
            right: 20px;
            top: 50%;
            bottom: auto;
            flex-direction: column;
            flex-wrap: wrap;
            align-content: end;
            width: auto;
            height: 100%;
            transform: translate(0, -50%);
            
            button {
        width: 30px;
                margin: 10px;
            }
        }
    }

    #carousel-wp {
        position: absolute;
        z-index: 0;
        left: 0;
        top: 0;
        width: 100vw;
        height: 100vh;
        overflow: hidden;

        img {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            min-width: 100%;
            min-height: 100%;
            display: block;
            opacity: 0;
            transition: opacity 0.6s linear;
            
            &.active {
                opacity: 1;
                transition: opacity 0.8s linear 0.2s;
            }
        }
    }
    
    #carousel {
        position: relative;
        z-index: 1;
        display: block;
        width: 60vh;
        max-width: 400px;
        margin-top: 10vh;
        perspective: 1000px;
        transform-style: preserve-3d;
        
        &:before {
            content: "";
            display: block;
            padding-top: 130%;
        }
        
        #bg {
            position: absolute;
            z-index: 1;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            width: 100%;
            height: 100%;
            transform-style: preserve-3d;
            
            .inner {
                width: 100%;
                height: 100%;
                transform: translateZ(0);
                transform-style: preserve-3d;
                
                .shield {
                    position: absolute;
                    left: 50%;
                    top: 50%;
                    display: block;
                    width: 100%;
                    fill: #666;
                    transform: translateX(-50%) translateY(-50%);
                    transition: fill 0.8s linear;
                }
                
                .shield-shadow {
                    position: absolute;
                    left: 50%;
                    top: 50%;
                    display: block;
                    width: 100%;
                    border-radius: 50%;
                    opacity: 0.5;
                    filter: blur(40px);
                    transform: translateX(-50%) translateY(-50%) translateZ(-300px) scale(1.2);
                }

                &.reset {
                    transform: rotateX(0) rotateY(0) !important;
                    transition: transform 1s ease-out 0.4s;
                }
            }
        }

        .item {
            position: absolute;
            z-index: 2;
            left: 50%;
            top: 50%;
            display: block;
            width: 100%;
            height: 100%;
            transform: translate(-50%, -50%);
            transform-style: preserve-3d;
            text-decoration: none;
            
            &.hidden {
                opacity: 0;
                visibility: hidden;
            }

            .inner {
                position: relative;
                display: flex;
                flex-direction: column;
                justify-content: flex-start;
                align-items: center;
                width: 100%;
                height: 100%;
                transform: translateZ(0);
                transform-style: preserve-3d;

                &.reset {
                    transform: rotateX(0) rotateY(0) !important;
                    transition: transform 1s ease-out 0.4s;
                }

                .img {
                    position: relative;
                    width: 100%;
                    height: 63%;
                    transform-style: preserve-3d;

                    svg {
                        position: absolute;
                        left: 0;
                        top: 0;
                        display: block;
                        width: 100%;
                        
                        &.blazon {
                            transform: translateZ(80px);
                        }

                        &.blazon-shadow {
                            opacity: 0.1;
                            transform: translateZ(0px) scale(1.1);
                        }
                    }
                }

                .txt {
                    display: block;
                    transform-style: preserve-3d;
                    transform: translateZ(50px);
                    text-align: center;
                    font-family: "Neuton", sans-serif;
                    font-size: 80px;
                    font-size: 10vh;
                    text-transform: uppercase;
                    line-height: 1;
                    color: #32325D;
                    white-space: nowrap;
                    transition: transform 0.3s ease-out;

                    span {
                        display: block;
                        
                        &.line-1 {
                            font-weight: 200;
                            transition: color 0.4s linear;
                        }
                        
                        &.line-2 {
                            transform: translateZ(-20px);
                            font-size: 0.5em;
                            font-weight: 400;
                        }
                    }
                }
            }

            &:hover {
                .txt {
                    transform: translateY(-30%) translateZ(120px);
                    transition: transform 0.4s ease-out;
                }
            }
        }
    }
}