@media only screen and (max-width: 800px) {
  :root {
    --img-size: 95%;
    --page-margin: 10px;
    --page-max-width: auto;
  }
}

@media only screen and (min-width: 800px) {
  :root {
    --img-size: 60%;
    --page-margin: auto;
    --page-max-width: 800px;
  }
}

:root {
  --background-color: lightgray;
}

* {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;

  font-family: "Nunito Sans", sans-serif;
  font-optical-sizing: auto;
  font-weight: 300;
  font-style: normal;
  font-variation-settings:
    "wdth" 100,
    "YTLC" 500;
}

h1 {
  font-size: 3em;
}

h2 {
  font-size: 2em;
}

h3 {
  font-size: 1.5em;
}

small {
  color: dimgray
}

.main-content p,
.main-content li {
  font-size: 1.3em;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--background-color);
}

a,
a:visited,
a:link {
  color: black
}

.header {
  text-align: center;
  background-color: var(--background-color);
  border: 1px solid;
}

.header ul {
  margin: 0;
}

.header ul li {
  display: inline;
  padding: 0 10px;
}

.main {
  background-color: var(--background-color);
}

.main h1 {
  margin: 0;
  padding: 0;
}

.main-header {
  border: 1px solid;
  text-align: center;
  margin: 20px 0;
}

.main-content {
  border: 1px solid;
  padding: 15px;
}

.page {
  margin: 10px var(--page-margin);
  max-width: var(--page-max-width);
}

strong { 
  font-weight: bold;
}

em { 
  font-style: italic;
}