body{
font-family:Arial;
text-align:center;
background:#f2f2f2;
}

table{
margin:auto;
border-collapse:collapse;
}

table,th,td{
border:1px solid black;
padding:10px;
}

button{
padding:8px 15px;
background:green;
color:white;
border:none;
cursor:pointer;
}

#seats{
display:grid;
grid-template-columns:repeat(5,60px);
gap:10px;
justify-content:center;
margin-top:20px;
}

.seat{
width:60px;
height:60px;
background:lightgreen;
line-height:60px;
cursor:pointer;
}

.selected{
background:orange;
}