*{
    margin: 0;
    padding: 0;
}
body{
    background: black;
}
.header{
    margin: auto;
    width: 300px;
    height: 180px;
    background: rgb(10, 10, 10);
    position: relative;
    top: -140px;
    align-items: center;
    border-radius: 0 0 50px 50px;
    transition: all 0.5s;
}
.header::before,.header::after{
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 0 0 50px 50px;
    background: linear-gradient(45deg,#ff0000,#00f0f0,#00ff00,#0000ff,#ff000069);
    z-index: -1;
    transform: scale(1.02);
    background-size: 500%;
    animation: anim 20s linear infinite;
}
@keyframes anim{
    0%,100%{background-position: 0 0;}
    50%{background-position: 300% 0;}
}
.header::after{
    filter: blur(10px);
}
input{
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translate(-50%);
    -webkit-appearance: none;
    outline: none;
    cursor: pointer;
}
input::before{
    content: '\f0c9';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    color: #f1f1f196;
}
a{
    margin: 20px;
    padding: 20px;
    color: rgb(95, 95, 95);
    position: absolute;
    font-weight: 700;
    font-family: cursive;
    text-decoration: none;
}
a:hover{
    color: #f1f1f196;
}
a:nth-child(3){
    left: 130px;
}
a:nth-child(5){
    top: 50px;
    left: 130px;
}
a:nth-child(4){
    top: 50px;
    left: 0px;
}