/* ═══════════════════════════════════════════════════════
   ARTICLE-DETAIL.CSS — Individual publication, KC article,
   and news post pages.

   Reuses tokens / nav / components / layout from the homepage.
   Reuses .ip-hero, .ip-content, .references, closing-cta
   patterns from info-page.css and layout.css.
   Page-specific classes prefixed `ad-`.
   ═══════════════════════════════════════════════════════ */


/* ── HERO (narrower than info-page) ─────────────────────
   Single column, more compact. Ledes are optional. */
.ad-hero {
  position: relative;
  padding: var(--gap-3xl) 0 var(--gap-xl);
  background:
    radial-gradient(ellipse 70% 60% at 25% 0%, rgba(143, 202, 235, 0.18) 0%, transparent 65%),
    linear-gradient(180deg, #f5f3ff 0%, #ffffff 75%);
  overflow: hidden;
}

.ad-hero__inner {
  max-width: 880px;
  margin: 0 auto;
}

.ad-hero__overline {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-coral-dark);
  margin-bottom: var(--gap-sm);
}

.ad-hero__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.875rem, 3.6vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-purple);
  margin: 0 0 var(--gap-md);
}

.ad-hero__title em {
  font-style: italic;
  color: var(--color-coral-dark);
}

.ad-hero__title sup {
  font-size: 0.4em;
  vertical-align: super;
  font-weight: 500;
}

.ad-hero__meta {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.55;
  color: var(--color-purple-mid);
  margin: 0 0 var(--gap-lg);
}

.ad-hero__meta strong {
  color: var(--color-purple);
  font-weight: 700;
}

.ad-hero__meta em {
  font-style: italic;
}

.ad-hero__lede {
  font-family: var(--font-body);
  font-size: var(--text-body-lg);
  line-height: 1.55;
  color: var(--on-surface-variant);
  margin: 0 0 var(--gap-md);
}

.ad-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-sm);
  margin-top: var(--gap-md);
}


/* ── BACK LINK / BREADCRUMB ──────────────────────────────
   Small "back to all X" link above the title. */
.ad-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-purple-mid);
  text-decoration: none;
  margin-bottom: var(--gap-md);
  transition: color 0.18s ease, transform 0.18s ease;
}

.ad-back:hover {
  color: var(--color-coral-dark);
}

.ad-back svg {
  width: 14px;
  height: 14px;
  transition: transform 0.18s ease;
}

.ad-back:hover svg {
  transform: translateX(-2px);
}


/* ── ARTICLE BODY ────────────────────────────────────────
   Reuses .ip-content / .ip-content__body pattern from
   info-page.css for the markdown-rendered prose.
   Adds a class for the WP "featured image at top" pattern. */
.ad-content {
  padding: var(--gap-xl) 0 var(--gap-2xl);
  background: #ffffff;
}

.ad-content__body {
  max-width: 720px;
  margin: 0 auto;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--on-surface);
}

.ad-content__body > img:first-child,
.ad-content__body > p:first-child > img:only-child,
.ad-content__featured-image {
  display: block;
  width: 100%;
  height: auto;
  max-width: 720px;
  margin: 0 auto var(--gap-lg);
  border-radius: var(--radius-lg);
}

.ad-content__author {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-coral-dark);
  margin: 0 0 var(--gap-lg);
}

.ad-content__body h2,
.ad-content__body h3,
.ad-content__body h4,
.ad-content__body h5 {
  color: var(--color-purple);
  letter-spacing: -0.01em;
  scroll-margin-top: 200px;
}

.ad-content__body h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.625rem, 2.6vw, 2.125rem);
  line-height: 1.18;
  margin: var(--gap-2xl) 0 var(--gap-md);
}

.ad-content__body h2:first-child { margin-top: 0; }

.ad-content__body h2 em { font-style: italic; color: var(--color-coral-dark); }

.ad-content__body h3 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.25rem;
  margin: var(--gap-xl) 0 var(--gap-sm);
}

.ad-content__body h4,
.ad-content__body h5 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: var(--gap-lg) 0 4px;
  color: var(--color-coral-dark);
}

.ad-content__body h4 em,
.ad-content__body h5 em {
  font-style: italic;
  text-transform: none;
  letter-spacing: 0;
}

.ad-content__body p { margin: 0 0 var(--gap-md); }

.ad-content__body ul,
.ad-content__body ol {
  margin: 0 0 var(--gap-md) 0;
  padding-left: 1.5em;
}

.ad-content__body li { margin-bottom: 6px; }

.ad-content__body a {
  color: var(--color-coral-dark);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.18s ease;
  word-break: break-word;
}

.ad-content__body a:hover { color: var(--color-coral); }

.ad-content__body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: var(--gap-md) 0;
}

.ad-content__body em { font-style: italic; }
.ad-content__body strong { color: var(--color-purple); font-weight: 700; }

/* Quote block */
.ad-content__body blockquote {
  border-left: 3px solid var(--color-coral);
  padding: 6px 0 6px var(--gap-md);
  margin: var(--gap-lg) 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.125rem;
  color: var(--color-purple);
}

/* Inline references (parenthesized superscript numbers) */
.ad-content__body sup,
.ad-content__body sub { font-size: 0.7em; }


/* ── REFERENCES SECTION ──────────────────────────────────
   Reuses the homepage references pattern (green gradient
   + lime accent) — defined in layout.css. The detail-page
   references list often contains many entries, so allow
   smaller type and tighter spacing. */
.ad-content + .references {
  margin-top: 0;
}

.ad-references {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.55;
}

.ad-references li {
  margin-bottom: 10px;
}


/* ── INLINE CTA (between content and references) ─────────
   For "View on Journal Site" / "Download PDF" buttons. */
.ad-inline-cta {
  max-width: 720px;
  margin: var(--gap-xl) auto 0;
  padding: var(--gap-lg);
  background: linear-gradient(135deg, rgba(57, 55, 143, 0.04), rgba(232, 32, 101, 0.04));
  border: 1px solid rgba(57, 55, 143, 0.12);
  border-radius: var(--radius-xl);
  text-align: center;
}

.ad-inline-cta__label {
  display: block;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-coral-dark);
  margin-bottom: var(--gap-sm);
}

.ad-inline-cta__text {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.25rem;
  line-height: 1.3;
  color: var(--color-purple);
  margin: 0 0 var(--gap-md);
}


/* ── ABOUT THE AUTHOR (KC posts) ─────────────────────────
   Trailing block on KC organism / antibiotic posts. */
.ad-author-card {
  max-width: 720px;
  margin: var(--gap-2xl) auto 0;
  padding: var(--gap-lg);
  background: var(--surface-container-low);
  border-radius: var(--radius-lg);
}

.ad-author-card__label {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-coral-dark);
  margin: 0 0 var(--gap-sm);
}

.ad-author-card__bio {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  color: var(--on-surface);
  margin: 0;
}