.nova-conta,.sou-cliente{
    width:413px;
    float:left;
    border:1px #ccc solid;
    padding:15px;
    min-height: 300px;
    border-radius:15px;
}

.nova-conta{
    margin-right:10px;
}
.sou-cliente b{
    font-weight: 500;
}
.login-cliente{
    width:57px;
}
.sou-cliente input[type=text],
.sou-cliente input[type=password]{
    width:250px;
}

#conteudo ul li{
    list-style-position: inside;
    padding-bottom: 10px;
}