.page-header{
  max-width: 900px;
  margin: 0 auto;
  margin-top: 100px;
}

h1{
  text-align: center;
  font-size: 60px;
}

.page-header .page-introduction{
  font-size: 1.8rem;
  line-height: 1.3;
}

/* Updates / curated RSS page */
.curated-links {
  margin-top: 48px;
  border-top: var(--grid-border);
}

.curated-links-toolbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 24px;
  border-bottom: var(--grid-border);
}

.link-filters,
.rss-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.link-filter-btn,
.rss-action {
  appearance: none;
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 12px;
  border: 1px solid currentColor;
  border-radius: 999px;
  background: var(--white);
  color: inherit;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
}

.link-filter-btn:hover,
.link-filter-btn.active,
.rss-action:hover,
.rss-action:focus-visible {
  background: var(--black);
  color: var(--white);
}

.links-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.link-card {
  position: relative;
  min-width: 0;
  padding: 36px;
  border-right: var(--grid-border);
  border-bottom: var(--grid-border);
}

.link-card:nth-child(3n) { border-right: 0; }
.link-card[hidden] { display: none; }
.link-card > a { display: block; color: inherit; text-decoration: none; }
.link-card img { display: block; width: 100%; height: auto; margin: 0 0 18px; }
.link-card h2 { margin: 0; font-size: clamp(24px, 3vw, 48px); font-weight: inherit; line-height: 1.05; }
.link-card a:hover h2 { text-decoration: underline; text-underline-offset: 3px; }
.link-description { margin: 12px 0 0; font-size: 18px; line-height: 1.4; }
.link-description > :first-child { margin-top: 0; }
.link-description > :last-child { margin-bottom: 0; }
.link-source { margin: 12px 0 0; font-size: 14px; opacity: 0.65; }

.link-node {
  position: absolute;
  top: 16px;
  left: 16px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  z-index: 4;
}

.link-connections {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  overflow: visible;
  color: var(--black);
  z-index: -1;
}

.link-connection-path {
  fill: none;
  stroke: currentColor;
  stroke-width: 1;
  opacity: 0.15;
}

/*
 * Related entries grid
 */

.related-entries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: 24px;
  margin-top: 48px;
  padding: 24px;
  border-top: var(--grid-border);
}

.related-entry-card {
  padding: 0;
  border-bottom: var(--grid-border);
  background: var(--white);
  transition: background-color 0.2s ease;
}

.related-entry-card h3 {
  margin: 0 0 12px;
  font-family: Courier New, Courier, monospace;
  font-size: clamp(18px, 1.5vw, 24px);
  font-weight: inherit;
  line-height: 1.2;
}

.related-entry-card h3 a {
  color: inherit;
  text-decoration: none;
}

.related-entry-card h3 a:hover {
  text-decoration: underline;
}

.related-entry-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.4;
}

/* Undated related entries form a glossary-like accordion. */
.related-entries-accordion {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 24px;
  padding: 24px;
}

.related-entry-card--collapsible {
  min-width: 0;
  padding: 0;
}

.related-entry-details summary {
  display: flex;
  align-items: baseline;
  justify-content: flex-start;
  gap: 8px;
  padding: 20px 0;
  font-family: Courier New, Courier, monospace;
  font-size: clamp(20px, 2vw, 32px);
  line-height: 1.2;
  cursor: pointer;
  list-style: none;
}

.related-entry-details summary::-webkit-details-marker {
  display: none;
}

.related-entry-details summary:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 4px;
}

.related-entry-count {
  flex: 0 0 auto;
  font-size: 0.7em;
}

.related-entry-details summary::after {
  content: '+';
  margin-left: auto;
}

.related-entry-details[open] summary::after {
  content: '−';
}

.related-entry-preview {
  max-width: 70ch;
  padding: 0 0 28px;
  font-size: 18px;
  line-height: 1.5;
}

.related-entry-preview p {
  margin: 0 0 1em;
  font-size: inherit;
  line-height: inherit;
}

.related-entry-read-more {
  display: inline-block;
  margin-top: 8px;
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}


.calendar .related-entries-grid{
  display: block;
  grid-template-columns: none;
  width: 100%;
  gap: 0;
  padding-top: 0;
}

.calendar .related-entry-card{
  width: 100%;
  border-bottom: var(--grid-border);
  display: flex;
   align-items: stretch;
}

.calendar .related-entry-card .date{
  width: 30%;
  font-size: 48px;
  padding-right: 24px;
  padding-bottom: 24px;
  padding-top: 24px;
  position: relative;
}

.calendar .related-entry-card .date:after{
  content: "";
  /* display: block; */
  width: 1px;
  height: 100%;
  background-color: var(--black);
  position: absolute;
  left: 100%;
  top: 0;
}

.calendar .related-entry-card h3{
  font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
  font-size: 48px;
  padding-left: 24px;
  padding-right: 24px;
  width: 30%;
   padding-bottom: 24px;
  padding-top: 24px;
}

.calendar .related-entry-card p{
  font-size: 24px;
  padding: 24px;
  width: 30%;
  margin-left: 5%;
}

/*
 * Mobile responsive
 */

@media (max-width: 1100px) and (min-width: 801px) {
  .related-entries-accordion {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 800px) {
  .curated-links-toolbar { flex-direction: column; padding: 16px; }
  .links-grid { grid-template-columns: 1fr; }
  .link-card, .link-card:nth-child(3n) { border-right: 0; padding: 40px 16px; }

  .related-entries-accordion {
    grid-template-columns: minmax(0, 1fr);
    padding: 24px var(--panel-padding);
  }

  .related-entries-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 32px;
    padding-top: 32px;
  }
  
  .related-entry-card {
    padding: 16px;
  }

  .related-entries-accordion .related-entry-card--collapsible {
    padding: 0;
  }

  .calendar .related-entries-grid {
    margin-top: 24px;
    padding: 0;
  }

  .calendar .related-entry-card {
    display: block;
    padding: 20px var(--panel-padding);
  }

  .calendar .related-entry-card .date,
  .calendar .related-entry-card h3,
  .calendar .related-entry-card p {
    width: auto;
    margin: 0;
    padding: 0;
  }

  .calendar .related-entry-card .date {
    font-size: 20px;
    line-height: 1.2;
  }

  .calendar .related-entry-card .date::after {
    display: none;
  }

  .calendar .related-entry-card h3 {
    margin-top: 12px;
    font-size: clamp(28px, 9vw, 40px);
    line-height: 1.05;
  }

  .calendar .related-entry-card p {
    margin-top: 16px;
    font-size: 18px;
    line-height: 1.35;
  }
}