login-anmination/style.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800;900&display=swap');
*
{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}
body
{
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #23242a;
}
.box
{
    position: relative;
    width: 380px;
    height: 420px;
    background: #1c1c1c;
    border-radius: 8px;
    overflow: hidden;
}
.box::before
{
   content: '';
   position: absolute;
   top: -50%;
   left: -50%;
   width: 380px;
   height: 420px;
   background: linear-gradient(0deg,transparent,transparent, #45f3ff,#45f3ff,#45f3ff);
   z-index: 1;
   transform-origin: bottom right;
   animation: animate 6s linear infinite; 
}
.box::after
{
   content: '';
   position: absolute;
   top: -50%;
   left: -50%;
   width: 380px;
   height: 420px;
   background: linear-gradient(0deg,transparent,transparent, #45f3ff,#45f3ff,#45f3ff);
   z-index: 1;
   transform-origin: bottom right;
   animation: animate 6s linear infinite; 
   animation-delay: -3s;
}
.borderLine
{
    position: absolute;
    top: 0;
    inset: 0;
}
.borderLine::before
{ 
   content: '';
   position: absolute;
   top: -50%;
   left: -50%;
   width: 380px;
   height: 420px;
   background: linear-gradient(0deg,transparent,transparent, #ff2770,#ff2770,#ff2770);
   z-index: 1;
   transform-origin: bottom right;
   animation: animate 6s linear infinite; 
   animation-delay: -1.5s;
}
.borderLine::after
{ 
   content: '';
   position: absolute;
   top: -50%;
   left: -50%;
   width: 380px;
   height: 420px;
   background: linear-gradient(0deg,transparent,transparent, #ff2770,#ff2770,#ff2770);
   z-index: 1;
   transform-origin: bottom right;
   animation: animate 6s linear infinite; 
   animation-delay: -4.5s;
}
@keyframes animate
{
    0%
    {
        transform: rotate(0deg);
    }
    100%
    {
        transform: rotate(360deg);
    }
}
.box form
{
    position: absolute;
    inset: 4px;
    background: #222;
    padding: 50px 40px;
    border-radius: 8px;
    z-index: 2;
    display: flex;
    flex-direction: column;
}
.box form h2
{
    color: #fff;
    font-weight: 500;
    text-align: center;
    letter-spacing: 0.1em;
}
.box form .inputBox
{
    position: relative;
    width: 300px;
    margin-top: 35px;
}
.box form .inputBox input
{
    position: relative;
    width: 100%;
    padding: 20px 10px 10px;
    background: transparent;
    outline: none;
    border: none;
    box-shadow: none;
    color: #23242a;
    font-size: 1em;
    letter-spacing: 0.05em;
    transition: 0.5s;
    z-index: 10;
}
.box form .inputBox span
{
    position: absolute;
    left: 0;
    padding: 20px 10px 10px;
    pointer-events: none;
    color: #8f8f8f;
    font-size: 1em;
    letter-spacing: 0.05em;
    transition: 0.5s;
}
.box form .inputBox input:valid ~ span,
.box form .inputBox input:focus ~ span
{
    color: #fff;
    font-size: 0.75em;
    transform: translateY(-34px);
}
.box form .inputBox input:valid ~ span,
.box form .inputBox input:focus ~ span
{
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: #fff;
    border-radius: 4px;
    overflow: hidden;
    transition: 0.5s;
    pointer-events: none;
}
.box form .inputBox i
{
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: #fff;
    border-radius: 4px;
    overflow: hidden;
    transition: 0.5s;
    pointer-events: none;
}
.box form .inputBox input:valid ~ i,
.box form .inputBox input:focus ~ i
{
    height: 44px;
}
.box form .links
{
    display: flex;
    justify-content: space-between;
}
.box form .links a
{
    margin: 10px 0;
    font-size: 0.75em;
    color: #8f8f8f;
    text-decoration: none;
}
.box form .links a:hover,
.box form .links a:nth-child(2)
{
    color:#fff; 
}
.box form input[type="submit"]
{
    border: none;
    outline: none;
    padding: 9px 25px;
    background: #fff;
    cursor: pointer;
    font-size: 0.9em;
    border-radius: 4px;
    font-weight: 600;
    width: 100px;
    margin-top: 10px;
}
.box form input[type="submit"]:active
{
    opacity: 0.8;
}