style.css

@import url("https://fonts.googleapis.com/css2?family=Roboto&display=swap");

*{
    margin: 0%;
    padding: 0%;
    box-sizing: border-box;
    font-family: 'Roboto', sans-serif;;
}

.container{
    width: 100%;
    height: 100vh;
    position: relative;
}

.container video{
    width: 100%;
    height: 100%;
}

.text{
    position: absolute;
    left: 0%;
    bottom: 0%;
    background-color: black;
    width: 100%;
    height: 100%;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    font-weight: 900;
    mix-blend-mode: darken;

}
.navbar{
    position: absolute;
    left: 0%;
    top: 0%;
    margin: 0%;
    padding: 35px 0;
    width: 85%;
    display: flex;
    align-items: stretch;
    justify-content: space-between;
   
}
.logo{
    width: 170px;
    cursor: pointer;

}

.navbar ul li{
    list-style: none;
    display: inline-block;
    margin: 0 20px;
    position: relative;
}
.navbar ul li a{
    text-decoration: none;
    color: white;
    font-family: sans-serif;

}
.navbar ul li::after{
    content: '';
    height: 3px;
    width: 0%;
    /* background: #0f7999; */
    background: #EF8A91;
    position: absolute;
    left: 0%;
    bottom: -10px;
    transition: 0.5s;
}

.navbar ul li:hover::after{
    width: 100%;

}

.content{
    position: absolute;
    left: 0%;
    top: 60%;
    margin: 0%;
    padding: 0 300px;
    width: 100%;
    display: flex;
    color: white;
    text-align: center;
}

.content p{
    margin: 20px auto;
    font-size: 20px;
    font-weight: 100;
    line-height: 25px;
    font-family: sans-serif;
}
button{
    position: absolute;
    right: 45%;
    top: 70px;
    padding: 15px 25px;
    margin: 20px;
    font-size: 16px;
    letter-spacing: 1px;
    /* border: 2px solid #0f7999; */
    border: 2px solid #EF8A91;
    color: #fff;
    cursor: pointer;
    /* background: linear-gradient(to left, transparent 50%, #0f7999 50%); */
    background: linear-gradient(to left, transparent 50%, #EF8A91 50%);
    background-size: 200%;
    background-position: right;
    transition: 0.5s;
}
button:hover{
    background-position: left;
    color: #fff;
}