.container {
  display: grid;
  grid-template-areas:
    "header header"
    "menu content"
    "footer footer";
  grid-template-columns: 1fr 3fr;
  gap: 3px;
  background-color: #010101;
  padding: 5px;
  margin: auto;
  width: 810px;
}

.container div {
  background-color: black;
  padding: 10px;
}
.container .header {
  grid-area: header;
  text-align: center;
}
.container .menu {
  grid-area: menu;
}
.container .content {
  grid-area: content;
}
.container .footer {
  grid-area: footer;
  text-align: center;  
}

a:link {
  color: cyan;
}
a:hover {
  color: red;
}
a:visited {
  color: magenta;
}

body {
  background-color: black;
  color: white;
  text-align: justify;
  
  font-family: fangsong;
  font-weight: 500;
  font-size: 14px;
  text-indent: 50px;

  display: block;
  margin-left: auto;
  margin-right: auto;
}

img {
  display: block;
  margin: auto;
}

p { 
  margin: 5px; 
}

h1, h2, h3, h4, h5{
  text-align: center;
  text-indent: 0px
}
h6 {
  text-align: right;
}