frontend/src/styles/components/_hero.css

/* ============================================================================ */
/* Hero + Meta bar                                                             */
/* Extracted from HeroArticle.astro scoped styles.                             */
/* Shared between editor (FrontmatterHero.tsx) and publisher (html-renderer).  */
/* ============================================================================ */

/* ---- Hero section ---- */

.hero {
  width: 100%;
  padding: 64px 16px 16px;
  text-align: center;
}

.hero-title {
  font-size: clamp(34px, 5vw, 54px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 auto 8px;
  max-width: 780px;
  text-wrap: balance;
}

.hero-title[data-title-size="md"] {
  font-size: clamp(28px, 4vw, 44px);
}

.hero-title[data-title-size="sm"] {
  font-size: clamp(24px, 3.2vw, 38px);
}

.hero-banner {
  max-width: 980px;
  margin: 0 auto;
  aspect-ratio: 5 / 2;
  overflow: hidden;
}

.hero-banner iframe {
  background: transparent;
}

/* Filled banner: hosts the iframe AND the action button cluster. */
.hero-banner--filled {
  position: relative;
}

/* Edit + Remove buttons are always visible (not hover-gated): the
   request from the author flow is to make banner mutation a first-
   class affordance, not a discover-on-hover surprise. Grouped in a
   single cluster top-right so screen-readers can navigate them as a
   pair and the shared backdrop reads well over any iframe content
   (image, chart, gradient). */
.hero-banner-actions {
  position: absolute;
  top: 8px;
  right: 8px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  z-index: 2;
}

.hero-banner-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--surface-bg, rgba(0, 0, 0, 0.6));
  color: var(--text-color);
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
}

.hero-banner-action:hover,
.hero-banner-action:focus-visible {
  border-color: var(--text-color);
  background: var(--surface-bg, rgba(0, 0, 0, 0.8));
  outline: none;
}

.hero-banner-action--danger:hover,
.hero-banner-action--danger:focus-visible {
  border-color: var(--ed-error, #d32f2f);
  color: var(--ed-error, #d32f2f);
}

/* Empty-banner placeholder: shown when the article has no banner set.
   Keeps the same aspect-ratio as a real banner so the layout doesn't jump
   when a user uploads an image or generates a chart. */
.hero-banner--empty {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--border-color);
  border-radius: 8px;
  background: var(--surface-bg, transparent);
  transition: border-color 120ms ease, background 120ms ease;
}

.hero-banner--empty:hover {
  border-color: var(--text-color);
}

.hero-banner-empty__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 24px;
  text-align: center;
}

.hero-banner-empty__hint {
  margin: 0;
  color: var(--muted-color);
  font-size: 14px;
}

.hero-banner-empty__actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-banner-empty__actions .btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-desc {
  color: var(--muted-color);
  font-style: italic;
  margin: 0 auto 16px;
  max-width: 55%;
}

@media (max-width: 768px) {
  .hero-banner { aspect-ratio: auto; }
  .hero-desc { max-width: 90%; }
}

/* ---- Meta bar ---- */

.meta {
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  font-size: 0.9rem;
}

.meta-container {
  max-width: 980px;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  margin: 0 auto;
  padding: 0 var(--content-padding-x, 16px);
  gap: 8px;
  flex-wrap: wrap;
  row-gap: 12px;
}

.meta-container a:not(.button) {
  color: var(--primary-color);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 0.06em;
  text-decoration-color: var(--link-underline);
  transition: text-decoration-color 0.15s ease-in-out;
}

.meta-container a:hover {
  text-decoration-color: var(--link-underline-hover);
}

.meta-container-cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 400px;
}

.meta-container-cell h3 {
  margin: 0;
  font-size: 12px;
  font-weight: 400;
  color: var(--muted-color);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.meta-container-cell p {
  margin: 0;
}

.authors {
  margin: 0;
  list-style-type: none;
  padding-left: 0;
  display: flex;
  flex-wrap: wrap;
}

.authors li {
  white-space: nowrap;
  padding: 0;
}

.affiliations {
  margin: 0;
  padding-left: 1.25em;
}

.affiliations li {
  margin: 0;
}

@media (max-width: 768px) {
  .meta-container-cell:nth-child(even) { text-align: right; }
  .meta-container-cell:last-child:nth-child(odd) {
    flex-grow: 0;
    flex-basis: auto;
    margin-left: auto;
    text-align: right;
  }
}