styles.css

* {
  box-sizing: border-box;
}

body {
  background-color: whitesmoke;
  font-family: calibri;
}

h1 {
  text-align: center;
}

h3 {
  color: darkblue;
  text-align: center;
}

table {
  border: 1px solid steelblue;
  text-align: center;
  margin: 0 auto;
}

td {
  border-bottom: 1px solid steelblue;
}

th {
  border-bottom: 1px solid steelblue;
  background-color: mediumslateblue;
  font-weight: 900;
}

.col1 {
  background-color: lightgray;
  font-weight: bold;
}

.col2 {
  padding: 0 10px;
  background-color: aliceblue;
}

.col3 {
  background-color: lightgray;
  padding: 0 10px;
}

.col4 {
  background-color: aliceblue;
}

.table3 {
  display: inline-block;
  left: 100px;
  position: relative;
}



.table-semantic {
  display: inline-block;
  position: relative;
  left: 200px;
}

.table-html-misc {
  position: relative;
  display: inline-block;
  top: -277px;
  left: 250px;
}


img {
  display: inline-block;
  width: 500px;
  height: 315px;
  position: relative;
  left: 105px;
  }

  .button {
    padding: 5px;
    border: 1px solid black;
    border-radius: 5px;
    text-decoration: none;
    box-shadow: 0px 5px;
  }
   
  .button:hover {
    cursor: pointer;
  }
   
  .button:active {
    margin-top: 5px;
    color: black;
    box-shadow: 0px 0px;
  }

  .arrow-right {
    width: 0; 
    height: 0; 
    border-top: 20px solid transparent;
    border-bottom: 20px solid transparent;
    border-left: 30px solid green;
  }

  th {
    color: #ffffff;
  }

  .red {
    color: red;
  }