nav {
    overflow: hidden;
    padding: 0px 0px;
}

nav h1 {
    display: block;
    float: left;
}

nav ul {
    display: block;
    float: right;
}

nav ul li {
    display: block;
    float: left;
    padding-left: 1em;
}

#activeRegistrationCodes {
    display: block;
    width: 100%;
}

#activeRegistrationCodes table {
    margin: 0 auto; /* or margin: 0 auto 0 auto */
}

#registeredUsers {
    display: block;
    width: 100%;
}

#registeredUsers table {
    margin: 0 auto; /* or margin: 0 auto 0 auto */
}

table {
    border-collapse: collapse;
}

table tr:nth-child(even) {
    background: #CCC
}

table th, td {
    padding-left: 1em;
    padding-right: 1em;
    text-align: center;
    height: 2.5em;
}

table tbody td {
    border: 1px solid black;
}

table tbody tr .borderless {
    border: none;
    background: white;
}

#register {
    width: 100%;
    text-align: center;
}

#register form {
    display: inline-block;
}

form div .row {
    display: table-cell;
}

label {
    display: inline-block;
    float: left;
    clear: left;
    width: 250px;
    text-align: right;
    padding-right: 1em;
    vertical-align: middle;
}

input {
    display: inline-block;
    float: left;
    vertical-align: middle;
    width: auto;
}

.formSubmit input {
    float: right;
}

.flashMessages {
    padding: 1em;
}

.flash {
    width: 100%;
    text-align: center;
}