.example-btn-class:link,
.example-btn-class:visited {
    text-decoration: none;
    padding: 10px 40px;
    display: inline-block;
    font-size: 25px;
    border-radius: 100px;
    transition: all .2s;
    position: relative;
}

.example-btn-class:hover {
    transform: translateY(-3px);
    box-shadow:
        0px 10px 20px rgba(0, 0, 0, .3)
}

.example-btn-class:active:hover {
    transform: translateY(-1px);
    box-shadow:
        0px 5px 10px rgba(0, 0, 0, .3)
}

.example-btn-class-white {
    color: #000000;
    background-color: #fff;
}

.example-btn-class-white::after {
    background-color: rgb(211, 211, 211);
}

.example-btn-class::after {
    content: "";
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
    display: inline-block;
    position: absolute;
    z-index: -1;
    transition: all .5s;
    border-radius: 100px;
}

.example-btn-class:hover::after {
    transform: scaleX(1.5) scaleY(1.4);
    opacity: 0;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 30px;
    height: 10vh;
    background: black;
}

.nav .nav__logo {
    /* background: yellow; */
    height: 100%;
    width: 200px;
    position: relative;
}

.nav .nav__logo video {
    width: 100%;
    height: 100%;
}

.text-box {
    position: absolute;
    top: 0;
    left: 0;
    background: #000;
    height: 100%;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 40px;
    font-weight: 900;
    mix-blend-mode: multiply;
}

.text-box a {
    color: #fff;
    text-decoration: none;
}

.nav ol {
    list-style: none;
}

.nav ol li {
    display: inline-block;
    margin-right: 20px;
    margin-top: 25px;
}

.nav ol li a {
    color: #fff;
    text-decoration: none;
    font-size: 18px;
    padding: 10px 20px;
    transition: all .5s;
    -webkit-transition: all .5s;
    -moz-transition: all .5s;
    -ms-transition: all .5s;
    -o-transition: all .5s;
    border-radius: 8px;
    -webkit-border-radius: 8px;
    -moz-border-radius: 8px;
    -ms-border-radius: 8px;
    -o-border-radius: 8px;
}

.nav ol li a:hover {
    background: red;
}