:root {
  --white: white;
  --black: black;
  --shadow: rgba(0, 0, 0, 0.1);
  --grayscale-percentage: 0%;
  --orange: #f17c58;
  --pink: #e94584;
  --blue: #24aadb;
  --green: #27dbb1;
  --pill: lightgray;
}

html,
body {
  /* overflow: hidden; */
  font-family: Helvetica, sans-serif;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-rows: 58px calc(100vh - 58px);
  height: 100vh;
  max-height: 100vh;
  color: var(--black);
  background: var(--white);
  transition: color 1s, background-color 1s;
}

/* START | Navigation Bar */
#main-navigation {
  padding: 20px;
  height: 24px;
  top: 0;
  background: var(--white);
  box-shadow: 0 0 5px 5px var(--shadow);
  z-index: 1;
  transition: color 1s, background-color 1s;
}

#main-navigation,
#main-navigation > ul {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#main-navigation > ul {
  justify-content: flex-end;
  list-style-type: none;
  margin: 0;
  padding: 0;
  max-width: 500px;
  width: 100%;
}

#main-navigation a {
  text-decoration: none;
  font-weight: bold;
}

#main-navigation li {
  padding-left: 30px;
}

#main-navigation a:visited {
  color: var(--black);
}
/* END | Navigation Bar */

/* START | Main Article */
main {
  max-height: calc(100vh - 58px);
  overflow: scroll;
  display: grid;
  grid-template-rows: 200px auto;
  grid-template-columns: 1fr 350px 650px 1fr;
  grid-template-areas:
    "header header header header"
    ". aside article .";
}

main > article {
  margin-bottom: 90vh;
  grid-area: article;
}

main > article > h2,
main > article > h3 {
  padding-top: 58px;
}

main > aside {
  grid-area: aside;
}

main > aside > div > nav > ul {
  padding: 0;
  margin: 0;
  list-style-type: none;
}

main > article h1:first-child {
  margin-top: 0;
}
/* END | Main Article */

/* START | Table of Contents */
#TableOfContents {
}
/* END | Table of Contents */

footer {
  height: 1000px;
}

img {
  width: 100%;
  border-radius: 5px;
  overflow: hidden;
  box-shadow: 0 5px 10px 1px var(--shadow);
  filter: grayscale(var(--grayscale-percentage));
}

figure {
  margin: 0;
}

figcaption > h4 {
  font-weight: lighter;
  font-style: italic;
  font-size: 0.8rem;
  max-width: 300px;
  text-align: center;
  margin: 15px auto 0 auto;
}

header {
  height: 200px;
  background: var(--black);
  grid-area: header;
}

article p {
  font-size: 20px;
  line-height: 35px;
}

article li {
  font-size: 20px;
  line-height: 35px;
  padding-bottom: 16px;
  padding-left: 16px;
}

aside a {
  text-decoration: none;
  color: var(--black);
}

aside {
  padding-top: 64px;
}

aside > div {
  position: sticky;
  position: -webkit-sticky;
  top: 60px;
}

aside li {
  padding-bottom: 10px;
}

aside ul ul {
  list-style-type: none;
  padding: 10px 0 0 20px;
}

header {
  display: flex;
  justify-content: center;
  flex-direction: column;
  background: linear-gradient(
    45deg,
    var(--orange),
    var(--pink),
    var(--blue),
    var(--green)
  );
  filter: grayscale(var(--grayscale-percentage));
  background-size: 600% 100%;
  animation: gradient 60s linear infinite;
  animation-direction: alternate;
}

@keyframes gradient {
  0% {
    background-position: 0%;
  }
  100% {
    background-position: 100%;
  }
}

#list {
  max-width: 1000px;
  padding: 20px;
  margin: 0 auto;
}

aside {
}

header h1 {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  color: white;
  font-size: 50px;
}

#list > h2 {
  margin-top: 100px;
}

#list > h2:first-child {
  margin-top: 50px;
}

article a {
  text-decoration: none;
  font-weight: bold;
  padding: 10px 15px;
  border: var(--black) thin solid;
  color: var(--black);
  display: inline-block;
  margin-top: 0;
  margin-bottom: 25px;
  transition: color 1s, border-color 1s;
}

#hamburger {
  display: none;
}

@media only screen and (min-width: 768px) and (max-width: 1024px) {
  main {
    grid-template-columns: 1fr 200px 548px 1fr;
    grid-gap: 0 20px;
  }

  header h1 {
    padding: 20px;
    box-sizing: border-box;
  }
}

@media only screen and (max-width: 767px) {
  #main-navigation > ul {
    position: absolute;
    top: 64px;
    left: 0;
    display: none;
    height: calc(100vh - 64px);
    width: 100vw;
    padding: 20px;
    max-width: unset;
    box-sizing: border-box;
    background: var(--white);
    font-size: 40px;
  }

  #main-navigation > ul.active {
    display: block;
  }

  nav ul li {
    padding: 30px 0;
  }

  #hamburger {
    display: block;
  }

  main {
    display: block;
  }
  article {
    padding: 0 20px;
  }
  aside {
    padding: 20px 20px 0 20px;
  }
  aside > div {
    position: static;
    display: none;
  }
  header h1 {
    padding: 20px;
    box-sizing: border-box;
  }
}

#home {
  background: linear-gradient(
    45deg,
    var(--orange),
    var(--pink),
    var(--blue),
    var(--green)
  );
  background-size: 600% 100%;
  animation: gradient 60s linear infinite;
  animation-direction: alternate;
  height: calc(100vh - 58px);
}

#home > div {
  max-width: 700px;
  padding: 20vh 20px 50px 20px;
  font-size: 20px;
  line-height: 1.58;
}

#home h1 {
  margin: 0;
  color: white;
}

#home p {
  color: white;
}

a,
a:visited,
a:active {
  color: var(--black);
}

#home h1 {
  font-size: 40px;
}

#home a {
  color: white;
  border-color: white;
}

#home > article {
  max-width: 1000px;
  margin: 0 auto;
  padding-top: 200px;
  text-align: center;
}

/* @media (prefers-color-scheme: dark) {
  :root {
    --white: black;
    --black: white;
    --shadow: rgba(255, 255, 255, 0.2);
    --grayscale-percentage: 0%;
    --orange: #614385;
    --pink: #516395;
    --blue: #9c274c;
    --green: #7b4397;
    transition: color 1s;
    --pill: #6b6b6b;
  }
  #main-navigation {
    box-shadow: inset 0 -7px 9px -7px var(--shadow);
  }
} */

svg {
  fill: var(--black);
}

pre {
  font-size: 1.1em;
  overflow-x: scroll;
  padding: 10px;
  border-radius: 5px;
}

p code {
  color: var(--black);
  background: var(--pill);
  padding: 0 5px;
  border-radius: 5px;
  box-shadow: inset 0 -7px 9px -7px var(--shadow);
}