body{
    font-family:Arial, sans-serif;
    background:#f3f3f3;
    margin:0;
}

#login{
    width:320px;
    margin:80px auto;
    background:white;
    padding:25px;
    border-radius:10px;
    box-shadow:0 0 10px rgba(0,0,0,.2);
}

input{
    width:100%;
    padding:10px;
    margin:10px 0;
    box-sizing:border-box;
}

button{
    width:100%;
    padding:10px;
    background:#0066cc;
    color:white;
    border:none;
    cursor:pointer;
}

button:hover{
    background:#004999;
}

header{
    background:#0066cc;
    color:white;
    padding:15px;
    display:flex;
    justify-content:space-between;
}

.card{
    background:white;
    margin:20px;
    padding:20px;
    border-radius:10px;
    box-shadow:0 0 5px rgba(0,0,0,.1);
}

.hidden{
    display:none;
}