body {
    padding-top: 100px;
    padding-bottom: 40px;
    background-color: #eee;
}

.form-signin,
.seleccion {
    max-width: 360px;
    padding: 20px;
    margin: 0 auto;
    background-color: #fff;
    border-radius: 3px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.13)
}

.seleccion.big {
    max-width: 900px;
}

h2 {
    margin-bottom: 20px;
    text-align: center;
}

.form-signin .checkbox {
    font-weight: normal;
}

.form-signin .form-control {
    position: relative;
    height: auto;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    padding: 10px;
    font-size: 16px;
}

.form-signin .form-control:focus {
    z-index: 2;
}

.form-signin input[type="text"] {
    margin-bottom: -1px;
    border-bottom-right-radius: 0;
    border-bottom-left-radius: 0;
}

.form-signin input[type="password"] {
    margin-bottom: 10px;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}

.seleccion input[type=submit] {
    min-width: 120px;
    margin-right: 15px;
}