body {
    background-color: #F6F5F5;
    font-family: "Roboto", sans-serif;
    font-weight: 400;
    font-style: normal;
}

.h1 {
    font-family: "Nunito", sans-serif;
    font-optical-sizing: auto;
    font-weight: 700;
    font-style: normal;
}

main {
    width: 100vw;
    height: 100vh;
}

.hid {
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
    height: 0;
    width: 0;
    z-index: -1;
}

#return-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgb(0, 0, 0);
    background: rgba(0, 0, 0, 0.7);
    width: 50px;
    height: 50px;
    display: block;
    text-decoration: none;
    -webkit-border-radius: 35px;
    -moz-border-radius: 35px;
    border-radius: 35px;
    display: none;
    -webkit-transition: all 0.3s linear;
    -moz-transition: all 0.3s ease;
    -ms-transition: all 0.3s ease;
    -o-transition: all 0.3s ease;
    transition: all 0.3s ease;
}

#return-to-top p {
    color: #fff;
    margin: 0;
    position: relative;
    top: 10px;
    font-size: 19px;
    -webkit-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    -ms-transition: all 0.3s ease;
    -o-transition: all 0.3s ease;
    transition: all 0.3s ease;
}

#return-to-top:hover {
    background: rgba(0, 0, 0, 0.9);
}

#return-to-top:hover i {
    color: #fff;
    top: 5px;
}

.slider-thumb::before {
    position: absolute;
    content: "";
    left: 15%;
    top: 20%;
    width: 450px;
    height: 450px;
    background: #17141d;
    border-radius: 62% 47% 82% 35% / 45% 45% 80% 66%;
    will-change: border-radius, transform, opacity;
    animation: sliderShape 5s linear infinite;
    display: block;
    z-index: -1;
    -webkit-animation: sliderShape 5s linear infinite;
}

@keyframes sliderShape {

    0%,
    100% {
        border-radius: 42% 58% 70% 30% / 45% 45% 55% 55%;
        transform: translate3d(0, 0, 0) rotateZ(0.01deg);
    }

    34% {
        border-radius: 70% 30% 46% 54% / 30% 29% 71% 70%;
        transform: translate3d(0, 5px, 0) rotateZ(0.01deg);
    }

    50% {
        transform: translate3d(0, 0, 0) rotateZ(0.01deg);
    }

    67% {
        border-radius: 100% 60% 60% 100% / 100% 100% 60% 60%;
        transform: translate3d(0, -3px, 0) rotateZ(0.01deg);
    }
}