* {
margin: 0;
padding: 0;
text-decoration: none;
font-family: cursive;
}
body {
min-height: 100vh;
background-image: linear-gradient(120deg,#3498db,#8e44ad);
}
.login-form {
width: 270px;
background: #f1f1f1;
height: 400px;
padding: 80px 40px;
border-radius: 10px;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
.login-form h1 {
text-align: center;
margin-bottom: 60px;
}
.txtb {
border-bottom: 2px solid #adadad;
position: relative;
margin: 30px 0;
}
.txtb input {
font-size: 15px;
color: #333;
border: none;
width: 100%;
outline: none;
background: none;
padding: 0 5px;
height: 40px;
}
.txtb span::before {
content: attr(data-placeholder);
position: absolute;
top: 50%;
left: 5px;
color: #adadad;
transform: translateY(-50%);
z-index: -1;
transition: .5s;
}
.txtb span::after {
content: ”;
position: absolute;
width: 0%;
height: 2px;
background: linear-gradient(120deg, #3498db, #8e44ad);
transition: .5s;
}
.focus + span::before {
top: -5px;
}
.focus + span::after {
width: 100%;
}
.logbtn {
display: block;
width: 100%;
height: 50px;
border: none;
background: linear-gradient(120deg, #3498db, #8e44ad);
background-size: 200%;
color: #fff;
outline: none;
cursor: pointer;
transition: .5s;
}
.logbtn:hover {
background-position: right;
}
.bottom-text {
margin-top: 60px;
text-align: center;
font-size: 13px;
}



Document