last.css

body{
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background-image: url('ok.jpeg');
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
}

.container{
    width: 100%;
    height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.content{
    margin-top: 250px;
    text-align: center;
    border: 2px solid rgba(255,255,255, .5);
    border-radius: 20px;
    backdrop-filter: blur(20px);
    box-shadow: 0 0 30px rgba(0, 0, 0, .5);
}

.content h1{
    font-size: 40px;
    color: #000;
    margin-bottom: 20px;
}

.content p{
    font-size: 20px;
    color: blanchedalmond;
    margin-bottom: 50px;
}

.btn-box{
    margin-top: 500px;
    margin-left: 200px;
    font-size: 40px;
    position: absolute;
    display: flex;
    justify-content: space-between;
    width: 345px;
    height:50px;
}

.btn-box a:hover{
    color: blanchedalmond;
}

.btn-box a{
    position: relative;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 150px;
    height: 100%;
    border: 2px solid  #162;
    border-radius:50px;
    font-size: 19px;
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 1px;
    background: transparent;
    color: #162;
    overflow: hidden;
    z-index: 1;
}

.btn-box a::before{
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width:0;
    height:100% ;
    background:#162;
    z-index: -1;
    transition:.5s ;
}

.btn-box a:hover:before{
    width: 100%;
}