styles.css

html {
    font-family: Arial;
}

* {
    padding: 5px !important;
    border-radius: 10px !important;
}

.container {
    display: grid;
    grid-template-columns: 1fr;
    height: 100vh;
    width: 100%;
    text-align: center;
    justify-content: center;
    justify-items: center;
}

.container table {
    margin: 0 auto;
    border-collapse: collapse;
    width: 100%;
    white-space: nowrap;
    background-color: rgba(239, 239, 239, 0.5);
}

.container td {
    padding: 8px;
    white-space: nowrap;
    text-align: left;
}

.container input[type="submit"] {
    width: 300px;
    width: 100%;
    box-sizing: border-box;
}

.container_eintragen input[type="text"] {
    width: 180px;
    box-sizing: border-box;
}

.container_eintragen {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    overflow-x: hidden;
    box-sizing: border-box;
}

td:nth-child(5) input[type="checkbox"] {
    margin: 0 auto;
    display: block;
}

td:nth-child(4) {
    text-align: center;
}