h1 {
    text-align: center;
}

.container {
    max-width: 50rem;
    width: 760px;
    margin:auto;
}

#addForm {
    padding: 1rem;
    background-color: #f2f2f2;
    min-width: 18.03rem;
    max-width: 30rem;
    margin:auto;
}

#addForm h2 {
    margin-top: 0.1rem;
}

input[type=text], select, textarea {
    width: 100%;
    padding: 12px 20px;
    margin: 8px 0;
    display: inline-block;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

input[type=submit] {
    width: 100%;
    background-color: #4CAF50;
    color: white;
    padding: 14px 20px;
    margin: 8px 0;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

table, td, th {
    border: 1px black solid;
}

table {
    border-collapse: collapse;
}

table {
    font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
    border-collapse: collapse;
    width: 100%;
}

table td, table th {
    border: 1px solid #ddd;
    padding: 8px;
}

table th {
    padding-top: 12px;
    padding-bottom: 12px;
    background-color: #4CAF50;
    color: white;
}

table tr:nth-child(even){background-color: #f2f2f2;}

table tr:hover {background-color: #ddd;}