*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Arial, Helvetica, sans-serif;
}

body{
    height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
    background:linear-gradient(135deg,#1d4350,#a43931);
}

.main{
    width:420px;
    height:420px;
    position:relative;
    overflow:hidden;
    border-radius:20px;
    backdrop-filter:blur(10px);
    background:rgba(255,255,255,0.1);
    box-shadow:0 10px 30px rgba(0,0,0,0.4);
}

.form{
    width:100%;
    padding:40px;
    position:absolute;
    top:0;
    transition:0.5s ease-in-out;
}

.form h2{
    text-align:center;
    margin-bottom:20px;
    color:white;
}

.form input{
    width:100%;
    padding:12px;
    margin:10px 0;
    border:none;
    outline:none;
    border-radius:8px;
}

.btns{
    display:flex;
    justify-content:space-between;
    margin-top:20px;
}

button{
    padding:10px 25px;
    border:none;
    border-radius:20px;
    background:linear-gradient(45deg,#ff512f,#dd2476);
    color:white;
    font-weight:bold;
    cursor:pointer;
    transition:0.3s;
}

button:hover{
    transform:scale(1.05);
}

/* Positioning */

.form1{ left:0; }
.form2{ left:100%; }
.form3{ left:200%; }