index.css

body{ margin:0px;}

.header{
height: 130px;
width: 100%;
background: #dfe6e9;
border: solid red 2 px;
margin: 0px;
}

.header img{
  height: 95%;
  float:left;
  margin-left: 10px;
  margin-right: 30px;
}

.header h1{
padding-top: 0px;
padding-bottom: 0px;
margin: 0;  
font-size: 40px;
}
.header h2{
padding-top: 0 px;
padding-bottom: 0px;
margin: 0; 
font-size: 30px;
}

.nav {
  height : 50px;
  width : 100%;
  background: #4CAF50;
  margin: 0px;
}

.nav ul{
  margin: 0px;
}

.nav ul li{
  list-style: none;
  display: inline;
  float: right;
  padding-right: 30px;
}

.nav ul li a{
    text-decoration: none;
    padding: 8px;
    margin: 0px;
    font-size: 20px;
    color: black;
    display:block;
}

.nav a:hover{
  background: #00b894;
  font-weight: bold;
}

table {
    margin-left: 23%;
    margin-top: 20px;
    border-collapse: collapse;
}

table, th, td {
    border: 1px solid black;
    text-align: center;
    padding: 5px;
}

th {
    background-color: #4CAF50;
    color: white;
}

tr:nth-child(even) {background-color: #dfe6e9;}

.desc img{
width:50%;
height: 50%;
float: left;
margin-right: 20px;
}

.desc h2{
text-align: center;
border: 0px;
padding: 0px;
margin-top: 0px;
}

.desc p {
  text-align: justify;
  margin: 20px 20px 20px 20px;
}