/* Newsletter article cards and the "More articles" list.

   Mobile first: the base rules are for phones (one column, compact spacing,
   touch-friendly targets). The grid adds columns from its own width rather
   than the viewport's, which also holds Helium's side navigation on wide
   screens: one column on phones, two from ~33rem, three from ~50rem.

   Colours use Helium's theme variables, so the cards follow the site's
   palette and its dark mode. */

.article-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr));
  gap: 0.75rem;
  margin: 1rem 0 1.5rem;
}

.article-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
  padding: 0.85rem 1rem;
  background: var(--bg-color);
  border: 1px solid var(--component-border);
  border-left: 4px solid var(--secondary-color);
  border-radius: 6px;
}

/* Override Helium's heading metrics (40px line-height, block margins). */
.article-card h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.article-card h3 a {
  color: var(--secondary-color);
  text-decoration: none;
}

/* The whole card is a tap target for the title link. */
.article-card h3 a::after {
  content: "";
  position: absolute;
  inset: 0;
}

.article-author {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-color);
}

.article-summary {
  margin: 0.15rem 0 0;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-color);
}

.more-articles {
  list-style: none;
  margin: 0.5rem 0 1.5rem;
  padding: 0;
}

.more-articles li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.15rem 0.6rem;
  min-height: 44px;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--component-border);
  overflow-wrap: anywhere;
}

.more-articles li:last-child {
  border-bottom: none;
}

.more-articles a {
  color: var(--secondary-color);
  font-weight: 600;
  text-decoration: none;
}

/* Hover effects only where there is a real pointer, so a tapped card
   doesn't stay "lifted" on touch screens. */
@media (hover: hover) {
  .article-card {
    transition: box-shadow 0.15s ease, transform 0.15s ease;
  }

  .article-card:hover {
    box-shadow: 0 4px 14px var(--subtle-highlight);
    transform: translateY(-2px);
  }

  .article-card:hover h3 a,
  .more-articles a:hover {
    text-decoration: underline;
  }
}

@media (prefers-reduced-motion: reduce) {
  .article-card {
    transition: none;
  }

  .article-card:hover {
    transform: none;
  }
}

@media (min-width: 576px) {
  .article-cards {
    gap: 1rem;
  }

  .article-card {
    padding: 1rem 1.15rem;
  }
}

/* Sidebar archive: one <details> group per year, rendered by
   helium/templates/mainNav.template.html. Folding is the browser's own
   <details> behaviour, so there is no JavaScript. Sizes and colours follow
   Helium's sidebar rules for its section headers and entries. */

#sidebar ul.nav-list.archive-nav {
  padding-bottom: 0;
}

#sidebar details.archive-year {
  margin: 0 0 0 25px;
}

#sidebar details.archive-year > summary {
  display: block;
  padding: 4px 15px 4px 0;
  color: var(--secondary-color);
  font-size: 0.9em;
  font-weight: bold;
  cursor: pointer;
  list-style: none;
}

#sidebar details.archive-year > summary::-webkit-details-marker {
  display: none;
}

#sidebar details.archive-year > summary::before {
  content: "▸";
  display: inline-block;
  width: 1em;
  transition: transform 0.15s;
}

#sidebar details.archive-year[open] > summary::before {
  transform: rotate(90deg);
}

#sidebar details.archive-year .archive-count {
  margin-left: 0.3em;
  font-weight: normal;
  opacity: 0.7;
}

#sidebar details.archive-year ul.nav-list {
  padding: 0 0 6px;
  margin: 0 0 0 1em;
}

#sidebar details.archive-year .nav-list li.level1 {
  margin-left: -15px;
  font-size: 0.9em;
}

#sidebar .archive-empty {
  margin: 0 0 6px 1em;
  padding: 2px 0 4px;
  color: var(--text-color);
  font-size: 0.85em;
  font-style: italic;
  opacity: 0.7;
}

/* Top bar: scala-lang.org's dark navy, in light and dark mode. Helium's
   high-contrast top bar reads its colours from these variables. */

header#top-bar {
  --component-area-bg: #002b36;
  --component-color: #a7d4de;
  --component-hover: #ffffff;
  --component-border: #002b36;
}

header#top-bar > a.text-link {
  color: #ffffff;
  font-weight: bold;
  letter-spacing: 0.02em;
}

/* Edition headings: "Scala News" as a small label above the date (see
   SiteTheme.editionTitle); the separator is kept for the page title only. */

h1 .edition-brand {
  display: block;
  margin-bottom: 0.2em;
  color: var(--primary-color);
  font-size: 0.45em;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 .edition-separator {
  display: none;
}

/* "Share this edition" links under an edition's heading (see
   SiteTheme.shareLinks): small and quiet, so the heading stays the focus. */

.share-links {
  margin: -0.4em 0 1.5em;
  color: var(--text-color);
  font-size: 0.85em;
  line-height: 1.8;
}

.share-links .share-label {
  margin-right: 0.3em;
  opacity: 0.8;
}

.share-links .share-sep {
  margin: 0 0.15em;
  opacity: 0.5;
}

.share-links a {
  white-space: nowrap;
}