body {

font-family: Arial;
background:#f2f2f2;

}


.box {

width:350px;
margin:100px auto;
background:white;
padding:30px;
border-radius:15px;

}


h1 {

text-align:center;

}


input {

width:100%;
padding:12px;
margin:8px 0;
box-sizing:border-box;

}


button {

width:100%;
padding:12px;
background:#222;
color:white;
border:0;
border-radius:8px;
font-size:16px;

}


button:hover {

opacity:0.8;

}


.error {

background:#ffdddd;
color:#b00000;
padding:10px;
border-radius:8px;
margin-bottom:15px;

}