body{
    background-color: darkgrey;
    text-align: center;
    font: bold italic 20px serif;
    color: lightgrey;
}
.button{
    background-color: white;
    color: darkgrey;
    border-radius: 5px;
    font-style: italic;
    border: 3px solid darkgrey;
    font-size: 16px;
}
.button:hover {
    background-color: grey;
    color: lightgrey;
    border-radius: 5px;
    font-style: italic;
    border: 3px solid lightgrey;
    font-size: 16px;
}
.container{
  height: 50px;
  position: relative;
  background-color: grey;
  color: lightgrey;
  font: bold italic 20px serif;
  border-radius: 15px;
  border: 3px solid lightgrey;
}
.vertical-center {
  margin: 0;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.one{
    background-color: grey;
    color: lightgrey;
    font: bold italic 20px serif;
    border-radius: 15px;
    border: 3px solid lightgrey;
    text-align: center;
}
audio{
    display: block;
    margin-left: auto;
    margin-right: auto;
}
table, th, td{
    border-collapse: collapse;
    margin-left: auto;
    margin-right: auto;
    border: 3px solid darkgrey;
    padding: 10px;
    color: darkgrey;
    background-color: white;
}
.t1,.t2,.t3,.t4,.t5,.t6,.t7, .t8, .t9{
    background-color: grey;
    color: lightgrey;
    font: bold italic 20px serif;
    border-radius: 15px;
    border: 3px solid lightgrey;
}
img{
    border-radius: 15px;
    width: 300px;
    height: auto;
    margin-left: auto;
    margin-right: auto;
}
.topnav {
  overflow: hidden;
  position: relative;
  z-index: 100; 
}
.topnav #myLinks {
  display: none;  
  background-color: grey;
  float: right;
  z-index: 101; 
  border-radius: 15px;
  border: lightgrey solid 3px;
}
.topnav a {
  color: lightgrey;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
  display: block;
  border-radius: 15px;
}
.topnav a.icon {
  display: block;
  position: absolute;
  right: 0;
  top: 0;
}
.active {
  background-color: grey;
  color: lightgrey;
    border: lightgrey solid 3px;
}
video{
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 300px;
    border-radius: 15px;
}