:root {
  --font-size: 14px;

  --color: #111;
  --bg-color: #fffff8;
  --faded-bg: #f9f9f2;

  --title-font-size: 16px;
  --title-font-weight: 600;

  --main-padding-right: 8rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color: #ddd;
    --bg-color: #151515;
    --faded-bg: #1b1b1b;
  }
}

@media screen and (max-width: 900px) {
  :root {
    --main-padding-right: 0;
  }

  article.item {
    margin-right: 0 !important;
    margin-left: 0 !important;
  }

  .menu-label,
  .menu-btn {
    display: block !important;
    position: absolute;
    top: 0;
    right: 0;
    z-index: 99;
  }

  .menu-btn {
    display: none !important;
  }

  .menu-label {
    padding: 1rem 2rem;
    background-color: var(--faded-bg);
  }

  .menu-label::after {
    content: 'groups';
  }

  .menu-btn:checked ~ .sidebar {
    display: block !important;
  }

  .menu-btn:checked ~ main {
    display: none !important;
  }

  .menu-btn:checked ~ .menu-label::after {
    content: 'back';
  }

  .sidebar {
    display: none !important;
    padding: 1rem;
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background-color: var(--bg-color);
  }

  .sidebar
    > header
    > .group-selector {
      list-style: none;
      padding: 0;
    }

  .sidebar
    > header
    > .group-selector
    > li {
      font-size: 1.2em;
    }
}

@keyframes details-show {
  from {
    opacity:0;
    transform: var(--details-translate, translateY(-0.5em));
  }
}

body {
  color: var(--color);
  background-color: var(--bg-color);
  margin: 0;
  padding: 0;
  font-family: serif;
  font-size: var(--font-size);
  overflow: hidden;
}

details[open] > *:not(summary),
section {
  animation: details-show 100ms ease-in-out;
}

h1, h2, h3 {
  font-family: monospace;
}

a:link {
  color: inherit;
}

a:visited {
  color: #b58c8c;
}

a:hover {
  opacity: .75;
}

summary {
  position: sticky;
  top: 0;
  padding-top: 0.65rem;
  padding-bottom: 0.65rem;
  user-select: none;
  cursor:pointer;
  font-family: monospace;
  background-color: var(--bg-color);
}

summary:hover span,
summary:hover div {
  opacity:.75;
}

.menu-btn,
.menu-label {
  display: none;
}

.group-selector a,
.group-selector a:visited {
  color: inherit;
  font-family: monospace;
  line-height: 1.5em;
}

.feed-title {
  font-weight: var(--title-font-weight);
  font-size: var(--title-font-size);
}

.feed-url, .feed-timestamp {
  color:#aaa;
}

.feed-url {
  font-size: ;
}

.feed-timestamp {
  margin-left: 1.45rem;
}

.monospace {
  font-family: monospace;
}

.inline {
  display: inline;
}

.app {
  display: flex;
  gap: 2rem;
  padding: 0 0rem 1rem 1rem;
}

.sidebar {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

header {
  padding-top: 1rem;
}

main {
  flex: 5;
  height: 100vh;
  overflow-y: auto;
  padding-right: var(--main-padding-right);
}

article.item {
  max-width: 85%;
  padding: 0.15rem 0.75rem;
  margin-left: 1.5rem;
  margin-right: 1.5rem;
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
  background-color: var(--faded-bg);
}

article.item header.item__header {
  font-size: var(--title-font-size);
}

ul.article-links {
  list-style: none;
  padding-left: 0;
}

ul.article-links > li {
  display:  inline-block;
  margin-right: .5rem;
}

footer {
  opacity: 0.25;
  font-size: 0.75em;
}

footer:hover {
  opacity: 1;
}

section {
  z-index: 1;
  /* ! Everything below is needed ! */
  display: none;
  height: 100%;
  width: 100%;
  background-color: var(--bg-color);
}

section > h2 {
  margin-top: 0;
  padding-top: 19px;
}

section:target { /* Show section */
  display: block;
}

section:target ~ .default-text {
  display: none;
}


.default-text {
  text-align: center;
  position: relative;
  top: 5%;
  font-family: monospace;
  font-size: 2em;
}