* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

body {
  background-image: url("kepek/hatter.jpg");
}

main {
  width: 80%;
  max-width: 1000px;
  margin: auto;
  display: grid;
  grid-template-areas:
    "h h h"
    "n ar as"
    "f f f";
  grid-template-columns: 1fr 2fr 2fr;
  background-color: whitesmoke;
}

header {
  grid-area: h;
  background-image: url("kepek/fejlec.jpg");
}

nav {
  grid-area: n;
}

article {
  grid-area: ar;
}

aside {
  grid-area: as;
  padding: 40px 30px 40px 30px;
}

footer {
  grid-area: f;
  background-color: #13a0ff;
}

h1 {
  color: white;
  text-align: center;
  text-shadow: black 1px 1px;
  padding-top: 30px;
  padding-bottom: 15px;
  font-size: 40px;
}

nav ul li {
  list-style-type: none;
  background-color: #13a0ff;
  border-radius: 15px 15px 15px 15px;
  text-align: center;
  padding: 10px 20px;
  margin: 5px;
}

nav ul li:hover {
  background-color: #07578d;
  cursor: pointer;
  transition: 0.3s;
}

nav a:link,
:visited {
  text-decoration: none;
  color: whitesmoke;
}

article table {
  width: 100%;
}

aside h2 {
  padding-bottom: 20px;
}

aside p {
  padding-bottom: 10px;
}

footer p {
  text-align: center;
  padding: 20px 0px 20px 0px;
}

@media screen and (max-width: 900px) {
  main {
    width: 100%;
    display: grid;
    grid-template-areas:
      "h h"
      "n n"
      "ar as"
      "f f";
    grid-template-columns: 1fr 1fr;
  }
}

@media screen and (max-width: 480px) {
  main {
    width: 100%;
    display: grid;
    grid-template-areas:
      "h"
      "n"
      "ar"
      "as"
      "f";
    grid-template-columns: 1fr;
  }
}