body {
  background: linear-gradient(to right, #667eea, #764ba2);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.card {
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.form-group i {
  display: block;
  font-style: normal;
  font-size: 0.9rem;
  margin-top: 0.2rem;
  color: #6c757d;
}

.links a {
  margin-right: 1rem;
}

*
{
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: 'Quicksand', sans-serif;
}
body 
{
display: flex;
justify-content: center;
align-items: center;
min-height: 100vh;
background: hsl(83, 65%, 45%);
}
section 
{
position: absolute;
width: 100vw;
height: 100vh;
display: flex;
justify-content: center;
align-items: center;
gap: 2px;
flex-wrap: wrap;
overflow: hidden;
}
section::before 
{
content: '';
position: absolute;
width: 100%;
height: 100%;
background: linear-gradient(#000,#0f0,#000);
animation: animate 5s linear infinite;
}
@keyframes animate 
{
0%
{
transform: translateY(-100%);
}
100%
{
transform: translateY(100%);
}
}
section span 
{
position: relative;
display: block;
width: calc(6.25vw - 2px);
height: calc(6.25vw - 2px);
background: #181818;
z-index: 2;
transition: 1.5s;
}
section span:hover 
{
background: #0f0;
transition: 0s;
}

section .signin
{
position: absolute;
width: 400px;
background: #222;  
z-index: 1000;
display: flex;
justify-content: center;
align-items: center;
padding: 40px;
border-radius: 4px;
box-shadow: 0 15px 35px rgba(0,0,0,9);
}
section .signin .content 
{
position: relative;
width: 100%;
display: flex;
justify-content: center;
align-items: center;
flex-direction: column;
gap: 40px;
}
section .signin .content h2 
{
font-size: 2em;
color: #0f0;
text-transform: uppercase;
}
section .signin .content .form 
{
width: 100%;
display: flex;
flex-direction: column;
gap: 25px;
}
section .signin .content .form .inputBox
{
position: relative;
width: 100%;
}
section .signin .content .form .inputBox input 
{
position: relative;
width: 100%;
background: #333;
border: none;
outline: none;
padding: 25px 10px 7.5px;
border-radius: 4px;
color: #fff;
font-weight: 500;
font-size: 1em;
}
section .signin .content .form .inputBox i 
{
position: absolute;
left: 0;
padding: 15px 10px;
font-style: normal;
color: #aaa;
transition: 0.5s;
pointer-events: none;
}
.signin .content .form .inputBox input:focus ~ i,
.signin .content .form .inputBox input:valid ~ i
{
transform: translateY(-7.5px);
font-size: 0.8em;
color: #fff;
}
.signin .content .form .links 
{
position: relative;
width: 100%;
display: flex;
justify-content: space-between;
}
.signin .content .form .links a 
{
color: #fff;
text-decoration: none;
}
.signin .content .form .links a:nth-child(2)
{
color: #0f0;
font-weight: 600;
}
.signin .content .form .inputBox input[type="submit"]
{
padding: 10px;
background: #0f0;
color: #000;
font-weight: 600;
font-size: 1.35em;
letter-spacing: 0.05em;
cursor: pointer;
}
input[type="submit"]:active
{
opacity: 0.6;
}
@media (max-width: 900px)
{
section span 
{
width: calc(10vw - 2px);
height: calc(10vw - 2px);
}
}
@media (max-width: 600px)
{
section span 
{
width: calc(20vw - 2px);
height: calc(20vw - 2px);
}
}