* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
html{
    scroll-behavior: smooth;
    width: 100%;
    overflow-x: hidden;
}
header{
    background-color: rgb(8, 61, 28);
    padding: 20px;

}
h1{
    text-align: center;
    font-family:'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    padding: 25px;
    color: rgb(58, 124, 52);
    font-size: 45px;
}
body{
    background-color: rgb(139, 186, 157);
}
a{
    color:rgb(19, 116, 47);
}
nav,
a {
    transition: 0.25s;
    font-size: 20px;
}
nav ul{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    align-items: center;
  
}
nav ul li{
    display: grid;
    margin-right: 30px;
    text-align: center;  
}
a:hover{
    color: rgb(158, 127, 208);
    transition: 0.5s;
}
nav ul li a {
    color: rgb(139, 186, 157);
    font-family:Arial, Helvetica, sans-serif;
    
}
h2{
    text-align:center;
    font-family:'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    padding: 15px;
    color: rgb(5, 88, 64);
    font-size: 35px;
    background-color: rgb(37, 119, 59);

}
h3{
    font-family:'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    color: rgb(59, 35, 99);
    font-size: 30px;
    font-weight:600;
    padding: 12px;
    text-align: center;
}
p{
    font-family: Arial, Helvetica, sans-serif;
    color: rgb(19, 116, 47);
 font-size: 20px;
padding: 15px;
text-align: center;
margin: auto;
    max-width: 700px;
}

img{
    width: 35%;
    padding: 10px;
    margin: auto;
    display: block;
}
figcaption{
    font-family: Arial, Helvetica, sans-serif;
    color: rgb(48, 5, 88);
    font-size: 20px;
    padding: 10px;
    text-align: center;
}
iframe{
    width: 50%;
    padding: 10px;
    margin: auto;
    display: block;
}
footer{
    background-color: rgb(8, 61, 28);
    padding: 20px;
    text-align: center;
}
@media screen and (min-width: 768px) {

    #Overview{
        grid-template-columns: 1fr 1fr;
    }
}
@media screen and (min-width: 1140px) {
    #Overview{
        grid-template-columns: 1fr 1fr 1fr;
    }

}