html {
  background-color: #ffffff;  
}

table.main {
  position: relative; 
  left: 10%; 
  top: 5px;
  bottom: 40px;
  width: 80%;
  border-style: none; 
  background-color: #000000; 
}
 
table.menu {
  
}

table.body {
  text-align: left;
}

table.left {
  text-align: left;
}

table.contact {
  text-align: left; 
}

table.schedule {
  text-align: center;
  border-color: #000000;
}

tr.mainmenu {
  background-color: #CCCCCC;
  text-align: center;
}

td.gallery {
  padding: 1cm;
}

td.mainmenu {
  background-color: #CCCCCC;
  vertical-align: top;
}

td.body {
  postion: relative;
  width: 70%;
  background: #FFFFFF;
  vertical-align: text-top;
  text-align: center;
  padding-bottom: 1cm;
  padding-left: 5%;
  padding-right: 5%;
}
 
td.menu {
  border-style: solid;
  border-width: thin;
  border-color: black;
  border-spacing: 1px;
  background-color: #000000;
  vertical-align: top;
}  

td.teachers {
  padding-left: 10px;
  padding-right: 10px;
  text-align: left;  
}

td.photo {
  left:5px;
}

th {
  text-align: left;
}
 
th.menu {
  text-align: center;
}
 
th.teachers {
  padding-left: 10px;
  padding-right: 10px;
  text-align: left; 
} 
  
h1 {
  text-align: center;
  color: #000040;
}  

h2 {
text-align: center;
}

p {
  padding-left: 3%;
  padding-right: 3%;
  text-align: center;
}

p.left {
  text-align: left;
}

p.headline {
  font-size: 16px;
  font-weight: bold;
}

p.schedule {
  font-size: 16px;
  font-weight: bold;

}
<!-- Normal links -->
a:link {
  color: #000000;
  text-decoration: none;
  font-weight: normal;
}

a:hover {
  color: #000000;
  text-decoration: none;
  font-weight: normal;
}

a:visited {
  color: #000000;
  text-decoration: none;
  font-weight: normal;
}
<!-- Specialized links: Menu -->
a:link.menu {
  color: #000000;
  text-decoration: none;
  font-weight: bold;
}

a:hover.menu {
  color: #000000;
  text-decoration: none;
  font-weight: bold;
}

a:visited.menu {
  color: #000000;
  text-decoration: none;
  font-weight: bold;
}
<!-- Specialized links: Others -->
a.students {
  font-size: 16px;
}

a.mail {
  color: #0033CC
}

a:visited.mail {
  color: #0033CC
}

a.info {
  font-weight: normal;
  font-size: 14px;
}

p.img {
  position: relative;
  text-align: center;
}

hr {
  color: #000000;
}