*, *::before, *::after {
  box-sizing: border-box;
}

:root {
  --primary-link-color: #d04000;
  --primary-bg-color: #FFE7D6;
  --primary-text-color: #323232;
  --primary-text-color-over: #000;
  --background-color: #fff;
  --secondary-text-color: #303030;
  --box-background-color: #fcfbf9;
  --code-color: #ffccb5;
  --code-background-color: #4a4a4a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary-link-color: #fd814c;
    --primary-bg-color: #3c3c3c;
    --primary-text-color: #e1e1e1;
    --primary-text-color-over: #FFF;
    --background-color: #282828;
    --secondary-text-color: #f2f2f2;
    --box-background-color: #3a3a3a;
  }
}

body {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-size: 16px;
  line-height: 1.6;
  font-family: "Fira Sans", sans-serif;
  color: var(--primary-text-color);
  background-color: var(--background-color);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a {
  color: var(--primary-link-color);
}

ul {
  margin-top: 0.5rem;
  padding-left: 1.5rem;
}

ul>li {
  padding: 0.3rem 0;
}

p>img {
  width: 100%;
  height: auto;
}

header {
  background-color: var(--primary-bg-color);
  color: var(--primary-text-color);
  margin-bottom: 1.5rem;
}

header h1 {
  color: var(--primary-link-color);
}

nav, main, footer {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
}

nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem;
  gap: 0 2.5rem;
  text-align: center;
}

nav a {
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.2;
  margin: 0;
  padding: 0;
  color: var(--primary-text-color);
  text-decoration: none;
}

.logo {
  width: 100%;
  max-width: 25rem;
}

main {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  word-wrap: break-word;
}

main h1:first-of-type {
  margin-top: 0;
}

h1 {
  font-size: 2.2rem;
  font-weight: 500;
  color: var(--primary-text-color);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

h2 {
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--primary-text-color);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

aside {
  min-width: 15rem;
  border-top: 5px solid var(--primary-link-color);
  background-color: var(--box-background-color);
  padding: 1rem 0;
}

.menu {
  padding: 1.5rem;
}

.menu .title,
.menu time {
  display: block;
}
.menu .title {
  font-size: 1.5rem;
}

.menu h2 {
  margin: 2rem 0 .5rem;
}

.menu h2:first-of-type {
  margin-top: 0;
}

.toc {
  display: none;
}

.toc-item {
  padding: 0.5rem 1.5rem;
  font-size: 1.2rem;
  font-weight: bold;
}

.toc-item-child {
  padding: 0 2rem 0.3rem;
  font-size: 1rem;
}

.toc-item a,
.toc-item-child a {
  color: var(--secondary-text-color);
  text-decoration: none;
}

.toc-item a:hover,
.toc-item-child a:hover {
  cursor: pointer;
  text-decoration: underline;
}

.toc-item a.active,
.toc-item-child a.active {
  color: var(--primary-link-color);
}

.toc-sticky {
  position: sticky;
  position: -webkit-sticky;
  position: -moz-sticky;
  position: -ms-sticky;
  position: -o-sticky;
  top: 2rem;
  max-height: 100vh;
  overflow: auto;
}

.content {
  flex-grow: 1;
}

.content pre {
  overflow-x: auto;
  padding: 1.25em 1.5em;
  white-space: pre;
  word-wrap: normal;
  background-color: var(--code-background-color);
  color: var(--code-color);
  font-family: monospace;
}

.content code {
  background-color: var(--code-background-color);
  color: var(--code-color);
  font-weight: normal;
  padding: 0.2rem 0.5rem;
  font-family: monospace;
  border-radius: 5px;
}

.content pre code {
  padding: 0;
}

.content a:hover {
  text-decoration: underline;
}

.content blockquote {
  margin: 0;
  padding: .5rem 1.5rem;
  border-left: var(--code-background-color) 8px solid;
  background-color: var(--box-background-color);
}

.button {
  display: inline-block;
  margin: .5rem .5rem .5rem 0;
  padding: .3rem .7rem;
  min-width: 8rem;
  font-size: 1rem;
  font-weight: bold;
  text-align: center;
  text-decoration: none;
  vertical-align: middle;
  user-select: none;
  border-radius: 0.5rem;
  background-color: var(--primary-link-color);
  color: var(--primary-bg-color);
}

.button:hover {
  opacity: 0.8;
}

.section-events h2 {
  color: var(--secondary-text-color); 
  margin-top: 3rem;
  margin-bottom: 1rem;
}

.section-events h3 {
  font-size: 1.5rem;
  margin-top: .5rem;
  margin-bottom: .5rem;
}

.event-page-link {
  padding-left: 1rem;
}

.event-page-link {
  display: block;
  padding-left: 2rem;
}

details summary { 
  cursor: pointer;
  width: 100%;
  padding-left: 1rem;
}

details summary:hover {
  background: #303030;
}

details summary > * {
  display: inline-block;
}

details {
  padding-left: 1rem;
  padding-right: 1rem;
}

details[open] {
  background: #303030;
}

dl {
  padding-left: 2rem;
}

dt {
  font-weight: bold;
}

dd {
  margin-bottom: .5rem;
}

dd:last-child {
  padding-top: 1rem;
  margin-left: 0;
}

.youtube-container {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 56.25%;
  margin: 1.5rem 0;
}

.youtube-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

@media screen and (min-width: 768px) {
  nav {
    flex-direction: row;
  }

  .logo {
    max-width: 15rem;
  }

  nav a {
    font-size: 2.5rem;
  }

  main {
    flex-direction: row;
  }

  .toc {
    display: block;
  }
}