th{
    font-style: bold; 
}

#first{
    text-align: center;
    vertical-align: middle;
    border-collapse: collapse; 
    margin: auto;
}

#table1cells{
 border-style: solid;
 border-width: thin;
 padding-top: 0.5em;
 padding-bottom: 0.5em;
 padding-right: 0.25em;
 padding-left: 0.25em;
}

#second{
 margin: auto;
 caption-side: bottom;
 border-collapse: collapse; 
}

#table2cells{
 border-style: solid;
 border-width: medium; 
}

#third{
 margin: auto;
 text-align: center;
 vertical-align: middle;
 border-collapse: collapse;
 caption-side: bottom; 
}

#table3cells{
 border-style: solid;
 border-width: thick; 
}
 
#fourth{
 margin: auto;
 text-align: center;
 vertical-align: middle;
 caption-side: bottom;
 font-family: sans-serif;
}

#table4cells{
 border-style: solid;
 border-width: medium;
 padding: 1em;
}