*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body{
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100vh;
    background-color: rgb(24, 28, 33);
}
.container{
    position: relative;
    width: 380px;
    height: 420px;
    background-color: rgb(15, 17, 21);
    border-radius: 8px;
    overflow: hidden;
}
.container .borderLine:nth-child(1){
    position: absolute;
    top: -50%;
    left: -50%;
    width: 380px;
    height: 420px;
    background: linear-gradient(0deg,transparent,transparent,#c70039,#c70039,#c70039);
    z-index: 1;
    transform-origin: bottom right;
    animation: animate 6s linear infinite;
}
.container .borderLine:nth-child(2){
    position: absolute;
    top: -50%;
    left: -50%;
    width: 380px;
    height: 420px;
    background: linear-gradient(0deg,transparent,transparent,#97fff4,#97fff4,#97fff4);
    z-index: 1;
    transform-origin: bottom right;
    animation: animate 6s linear infinite;
    animation-delay: -1.5s;
}
.container .borderLine:nth-child(3){
    position: absolute;
    top: -50%;
    left: -50%;
    width: 380px;
    height: 420px;
    background: linear-gradient(0deg,transparent,transparent,#c70039,#c70039,#c70039);
    z-index: 1;
    transform-origin: bottom right;
    animation: animate 6s linear infinite;
    animation-delay: -3s;
}
.container .borderLine:nth-child(4){
    position: absolute;
    top: -50%;
    left: -50%;
    width: 380px;
    height: 420px;
    background: linear-gradient(0deg,transparent,transparent,#97fff4,#97fff4,#97fff4);
    z-index: 1;
    transform-origin: bottom right;
    animation: animate 6s linear infinite;
    animation-delay: -4.5s;
}
@keyframes animate{
    0%{
        transform: rotate(0deg);
    }
    0%{
        transform: rotate(-360deg);
    }
}

.container form{
    position: absolute;
    inset: 4px;
    background-color: rgb(36, 42, 50);
    padding: 50px 40px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    z-index: 10;
}
.container form h2{
    color: white;
    font-weight: 500;
    font-size: 26px;
    text-align: center;
    letter-spacing: 1px;
}
.container form .inputBox{
    position: relative;
    width: 300px;
    margin-top: 35px;
}
.container form .inputBox input{
    position: relative;
    width: 100%;
    padding: 20px 10px 10px;
    background: transparent;
    border: none;
    outline: none;
    color: #23242a;
    font-size: 16px;
    letter-spacing: 1px;
    transition: all 0.5s;
    z-index: 10;
}
.container form .inputBox span{
    position: absolute;
    left: 0;
    padding: 20px 10px 10px;
    pointer-events: none;
    color: #8f8f8f;
    font-size: 16px;
    letter-spacing: 1px;
    transition: all 0.5s;
}
.container form .inputBox input:focus ~ span,
.container form .inputBox input:valid ~ span{
    color: white;
    font-size: 12px;
    transform: translateY(-35px);
}
.container form .inputBox i{
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background-color: #fff;
    border-radius: 2px;
    transition: all 0.5s;
}
.container form .inputBox input:focus ~ i,
.container form .inputBox input:valid ~ i{
    height: 44px;
}
.container form .links{
    display: flex;
    justify-content: space-between;
}
.container form .links a{
    margin: 10px 0;
    font-size: 14px;
    text-decoration: none;
    color: #8f8f8f;
    transition: all 0.5s;
}
.container form .links a:hover,
.container form .links a::nth-child(2){
    color: #fff;
}
.container form input[type="submit"]{
    border: none;
    outline: none;
    padding: 9px 25px;
    background-color: #fff;
    border-radius: 2px;
    font-size: 14px;
    margin-top: 12px;
    cursor: pointer;
    width: 120px;
}
.container form input[type="submit"]:active{
    opacity: 0.8;
}