body {font-family: "Times New Roman", Times, Serif ; background-color: #b3d4fc ; text-align: center}
button {height: 50px ; width: 200px ; font-size: 20px ; margin-bottom: 10px}
h1 {color: White}
li {display: block}
table, td {border: 1px solid #4CAF50 ; border-collapse: collapse ; padding: 15px ; text-align: center ; font-size: 18px ; margin-bottom: 15px}
th {padding: 15px ; text-align: center ; font-size: 18px ; background-color: #4CAF50}