h2 {
    text-align: center;
}
table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    margin-top: 10px;
}
.header {
    font-weight: bold;
    background-color: #ebebeb;
}
.light {
    background-color: #fff;
}
.dark {
    background-color: #ccc;
}
form {
    text-align: right;
}