html{
    height: 100%;
}
body{
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background: linear-gradient(lightblue,white);
}
.login-box{
    position: absolute;
    top: 50%;
    left: 50%;
    max-width: 70vw;
    width: 100%;
    padding: 40px;
    transform: translate(-50%,-50%);
    background: rgba(0,0,0,.5);
    box-sizing: border-box;
    box-shadow: 0 15px 25px rgba(0,0,0,.5) ;
    border-radius: 10px;
}
.login-box textarea{
    width: 100%;
    height: 60px;
    padding: 5px 0;
    padding-left: 10px;
}
.user-box select{
    width: 45%;
    height: 30px;
    text-align: center;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}
.sel{
    display: flex;
    justify-content: space-between;
}
.login-box h2{
    margin: 0 0 30px;
    padding: 0;
    color: #ffffff;
    text-align: center;
}
.login-box .user-box{
    position: relative;
}
.login-box .user-box input{
    width: 100%;
    padding: 10px 0;
    font-size: 16px;
    color: #fff;
    margin-bottom: 30px;
    border: none;
    border-bottom: 1px solid #f9f3f3;
    outline: none;
    background: transparent;
}
.login-box .user-box label{
    position: absolute;
    top: 0;
    left: 0;
    padding: 10px 0;
    font-size: 16px;
    color: #fff;
    pointer-events: none;
    transition: .5s;
}
.login-box .user-box input:focus~label
.login-box .user-box input:valid~label{
    top: -20px;
    left: 0;
    color: #03e9f4;
    font-size: 12px;
}
.login-box form a{
    position: relative;
    display: inline-block;
    padding: 10px 20px;
    color: #03e9f4;
    font-size: 16px;
    text-decoration: none;
    text-transform: uppercase;
    overflow: hidden;
    transition: .5s;
    margin-top: 40px;
    letter-spacing: 4px;
}
.login-box a:hover{
    background: #03e9f4;
    color: #fff;
    border-radius: 5px;
    box-shadow: 0 0 5px #03e9f4,0 0 5px #03e9f4, 0 5px #03e9f4, 0 5px #03e9f4;
}
.login-box a span{
    position: absolute;
    display: block;
}
.login-box a span:nth-child(1){
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg);
    animation: btn-anim1 1s linear infinite;
}
.user-box input::placeholder{
    color: #ffffff;
}
@keyframes btn-anim1 {
    0%{
        left: -100%;
    }
    50%,100%{
        left: -100%;
    }
}
.login-box a span:nth-child(2){
    top: -100%;
    right: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg);
    animation: btn-anim2 1s linear infinite;
    animation-delay: .25s;
}
@keyframes btn-anim2 {
    0%{
        top: -100%;
    }
    50%,100%{
        top: -100%;
    }
}
.login-box a span:nth-child(3){
    bottom: 0;
    right: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(270deg,);
}