* {
  box-sizing: border-box;
}

html {
  background: #5d5d5d;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  margin: 3rem 0 0;
}

body {
  display: grid;
  grid-template: repeat(3, auto) / auto 1fr;
  width: 1000px;
  max-width: 90%;
  margin: 0 auto;
}

header {
  background: #e4e0cc;
  grid-area: 1 / 1 / 1 / -1;
  margin: 0;
  text-align: center;
  width: 100%;
}

a {
  text-decoration: none;
}

header h1 {
  font: 40px 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
}

header a {
  color: #333;
}

nav {
  background: #e4e0cc;
  border-right: 1px solid #333;
  display: flex;
  grid-area: 2 / 1 / 3 / 1;
  z-index: 100;
}

nav ul {
  list-style: none;
  padding: 1rem;
}

nav li {
  flex: 1;
  margin-bottom: .5rem;
}

nav a,
table a {
  background: #7b7b7b;
  border: 1px solid #000;
  color: #fff;
  display: block;
  padding: .5rem;
  text-align: center;
}

nav a:hover,
table a:hover {
  background: #595959;
}

main {
  background: #fff;
  box-shadow: inset 0px 0px 10px 8px rgba(0, 0, 0, .5);
  display: flex;
  flex-direction: column;
  grid-area: 2 / 2 / 3 / -1;
  padding: 3rem;
  margin-right: 1rem;
}

main h1 {
  margin: 0;
  padding-bottom: .5rem;
}

  
main a {
  padding-bottom: .5rem;
}

footer {
  background: #e4e0cc;
  padding-left: 1rem;
  grid-area: 3 / 1 / -1 / -1;
}

table,
th,
td {
  border: 1px solid;
  border-collapse: collapse;
  padding: .5rem;;
}

table a {
  padding: .3rem;
}