I am making a portfolio site and now working on the projects section. I am using the grid display for the main div wrapper. At the beginning of my CSS, I set the margin of the .main, body, and html to 0 so that I don't have any leftover space on one of the sides. For some reason, there's a weird gap at the bottom of the page: 
I have tried setting the margin of a few more elements to 0, but nothing seems to work. Do you have an idea about what may be causing this?
@import url("https://fonts.googleapis.com/css?family=Roboto&display=swap");
html,
body,
.main {
margin: 0;
height: 100%;
width: 100%;
}
body {
background-image: radial-gradient(#181818, #050505);
}
body .nav {
margin: 10px 0;
text-align: center;
font-family: 'Roboto', sans-serif;
font-size: 2vw;
}
body .nav a,
body .nav a:visited {
border-radius: 5px;
padding: 0.2vh 0.65vw;
margin: auto 30px;
color: whitesmoke;
text-decoration: none;
-webkit-transition: 0.275s;
transition: 0.275s;
}
body .nav a:hover {
color: #f2f2f2;
background-color: rgba(163, 163, 163, 0.1);
}
body .main {
display: -ms-grid;
display: grid;
-ms-grid-columns: 2.5% 30% 2.5% 30% 2.5% 30% 2.5%;
grid-template-columns: 2.5% 30% 2.5% 30% 2.5% 30% 2.5%;
-ms-grid-rows: 2.5% 40% 2.5% 40% 2.5%;
grid-template-rows: 2.5% 40% 2.5% 40% 2.5%;
}
body .main img {
border-radius: 3%;
height: 100%;
}
body .main #img1 {
-ms-grid-column: 2;
-ms-grid-column-span: 1;
grid-column: 2/3;
-ms-grid-row: 2;
-ms-grid-row-span: 1;
grid-row: 2/3;
}<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta http-equiv="X-UA-Compatible" content="ie=edge" /><title>Projects</title><link rel="stylesheet" href="../../styles/styles-projects.css" /></head><body><div class="nav"><a href="../portfolio/portfolio.html">PORTFOLIO</a><a href="../../../index.html">HOME</a></div><div class="main"><img id="img1" src="../../images/Project-1.PNG" alt="Project card" /></div></body></html>Gist code: https://gist.github.com/VlatkoStojkoski/d8f9f300fbd57f5987c6bb66fb9206bf