/* ================================================================
   Peptide Authority Network — Base CSS
   Structural layout using CSS custom properties for all colors/fonts.
   Shared across all 5 sites. theme.css overrides the custom properties.
   ================================================================ */

/* ── Reset & Box Model ───────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ── Base ────────────────────────────────────────────────────── */
html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── Typography ──────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  line-height: 1.25;
  font-weight: 600;
}

h1 { font-size: 2rem; margin-bottom: 1rem; }
h2 { font-size: 1.5rem; margin-top: 2.5rem; margin-bottom: 0.75rem; }
h3 { font-size: 1.2rem; margin-top: 1.5rem; margin-bottom: 0.5rem; }

p { margin-bottom: 1.25rem; }

a {
  color: var(--color-accent);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

ul, ol {
  margin-left: 1.5rem;
  margin-bottom: 1.25rem;
}

li { margin-bottom: 0.25rem; }

code, pre {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

code {
  background: var(--color-accent-light);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  color: var(--color-primary);
}

pre {
  background: var(--color-accent-light);
  padding: 1.25rem;
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: 1.25rem;
  border-left: 3px solid var(--color-accent);
}

pre code {
  background: none;
  padding: 0;
}

blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 1.25rem;
  color: var(--color-muted);
  margin: 1.5rem 0;
  font-style: italic;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2rem 0;
}

/* ── Layout ──────────────────────────────────────────────────── */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container--narrow {
  max-width: 740px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Site Header / Nav ───────────────────────────────────────── */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-header__logo {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--color-primary);
}

.site-header__logo-mono {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.site-header__logo-name {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--color-muted);
  letter-spacing: 0.01em;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-header__nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: color 0.15s;
}

.site-header__nav a:hover {
  color: var(--color-accent);
}

.site-header__nav a.active {
  color: var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 2px;
}

/* ── Hero Section ────────────────────────────────────────────── */
.hero {
  background: var(--color-primary);
  color: var(--color-surface);
  padding: 4rem 1.5rem;
  text-align: center;
}

.hero__tagline {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 500;
  color: rgba(255,255,255,0.6);
  margin-bottom: 0.75rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-surface);
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.hero__mission {
  font-size: 1rem;
  color: rgba(255,255,255,0.75);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.65;
}

/* ── Section Layout ──────────────────────────────────────────── */
.section {
  padding: 3.5rem 0;
}

.section + .section {
  border-top: 1px solid var(--color-border);
}

.section__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.section__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.section__link {
  font-size: 0.85rem;
  color: var(--color-accent);
  text-decoration: none;
}

.section__link:hover { text-decoration: underline; }

/* ── Post Cards ──────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s;
}

.card:hover {
  border-color: var(--color-accent);
}

.card__badges {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.2em 0.6em;
  border-radius: 4px;
  white-space: nowrap;
}

.badge--category {
  background: var(--color-primary);
  color: #fff;
}

.card__title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.35;
  margin-bottom: 0.6rem;
  flex-grow: 1;
}

.card__title a {
  color: inherit;
  text-decoration: none;
}

.card__title a:hover {
  color: var(--color-accent);
}

.card__excerpt {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 1rem;
}

.card__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.78rem;
  color: var(--color-muted);
  margin-top: auto;
}

.card__meta-sep {
  color: var(--color-border);
}

/* ── Category Pills ──────────────────────────────────────────── */
.category-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.pill {
  display: inline-block;
  padding: 0.35em 0.9em;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-surface);
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}

.pill:hover,
.pill--active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  text-decoration: none;
}

/* ── About Block ─────────────────────────────────────────────── */
.about-block {
  background: var(--color-accent-light);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: 6px;
  padding: 1.75rem 2rem;
}

.about-block p {
  font-size: 0.925rem;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.about-block p:last-child { margin-bottom: 0; }

/* ── Listing Page ────────────────────────────────────────────── */
.listing-header {
  padding: 2.5rem 0 1.5rem;
}

.listing-header h1 {
  font-size: 1.75rem;
  margin-bottom: 0.25rem;
}

.listing-header p {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.filter-bar {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2rem;
}

.filter-bar__label {
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  margin-bottom: 0.6rem;
}

/* Post list rows */
.post-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.post-row {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: border-color 0.15s;
}

.post-row:hover { border-color: var(--color-accent); }

.post-row__badges {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.post-row__title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.35;
}

.post-row__title a {
  color: inherit;
  text-decoration: none;
}

.post-row__title a:hover { color: var(--color-accent); }

.post-row__excerpt {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-row__meta {
  display: flex;
  gap: 0.75rem;
  font-size: 0.78rem;
  color: var(--color-muted);
}

/* ── Pagination ──────────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.pagination__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.4em 0.9em;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.875rem;
  color: var(--color-primary);
  background: var(--color-surface);
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s;
}

.pagination__btn:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
  text-decoration: none;
}

.pagination__btn--active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.pagination__btn--disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* ── Post Page ───────────────────────────────────────────────── */
.post-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3rem;
  align-items: start;
  max-width: 1000px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.post-layout--no-toc {
  grid-template-columns: 1fr;
  max-width: 740px;
}

/* TOC */
.toc {
  position: sticky;
  top: 80px;
  font-size: 0.82rem;
}

.toc__title {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-muted);
  margin-bottom: 0.75rem;
}

.toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--color-border);
}

.toc__item {
  margin-bottom: 0;
}

.toc__link {
  display: block;
  padding: 0.3em 0 0.3em 0.85em;
  color: var(--color-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -2px;
  transition: color 0.15s, border-color 0.15s;
  line-height: 1.4;
}

.toc__link:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.toc__link.active {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
  font-weight: 500;
}

/* Post Header */
.post-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.post-header h1 {
  font-size: 1.85rem;
  margin-top: 0.75rem;
  margin-bottom: 1rem;
  line-height: 1.25;
}

.post-header__byline {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.82rem;
  color: var(--color-muted);
  flex-wrap: wrap;
}

.post-header__byline-sep {
  color: var(--color-border);
}

/* Answer capsule — first paragraph of post */
.answer-capsule {
  border-left: 4px solid var(--color-accent);
  padding: 1rem 1.25rem;
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.7;
  background: var(--color-accent-light);
  border-radius: 0 4px 4px 0;
  margin-bottom: 1.75rem;
}

/* Post body content */
.post-body {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
}

.post-body h2 {
  font-size: 1.35rem;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-top: 0.5rem;
}

.post-body p {
  margin-bottom: 1.25rem;
}

/* FAQ Section */
.faq-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.faq-section__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: 6px;
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.faq-item__question {
  width: 100%;
  text-align: left;
  background: var(--color-surface);
  border: none;
  padding: 1rem 1.25rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.faq-item__question:hover {
  background: var(--color-accent-light);
}

.faq-item__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  font-size: 1.1rem;
  transition: transform 0.2s;
}

.faq-item__icon--open {
  transform: rotate(45deg);
}

.faq-item__answer {
  display: none;
  padding: 0 1.25rem 1rem;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-surface);
  overflow: hidden;
}

.faq-item__answer.open {
  display: block;
}

/* Sources */
.sources-section {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.sources-section__title {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.sources-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: source-counter;
}

.sources-list li {
  counter-increment: source-counter;
  padding: 0.4em 0 0.4em 2.5em;
  position: relative;
  font-size: 0.85rem;
  color: var(--color-muted);
  border-bottom: 1px solid var(--color-border);
}

.sources-list li:last-child { border-bottom: none; }

.sources-list li::before {
  content: counter(source-counter) ".";
  position: absolute;
  left: 0;
  font-weight: 500;
  color: var(--color-primary);
}

/* Author block */
.author-block {
  margin-top: 2.5rem;
  padding: 1rem 1.25rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.82rem;
  color: var(--color-muted);
  font-style: italic;
}

/* ── About Page ──────────────────────────────────────────────── */
.about-page {
  padding: 3rem 0;
}

.about-page h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.about-page .subtitle {
  font-size: 1rem;
  color: var(--color-muted);
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.about-section {
  margin-bottom: 2.5rem;
}

.about-section h2 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  margin-top: 0;
}

.about-section p {
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 0.75rem;
}

/* ── Legal Pages ─────────────────────────────────────────────── */
.legal-page {
  padding: 3rem 0;
}

.legal-page h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.legal-page .subtitle {
  font-size: 1rem;
  color: var(--color-muted);
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
  line-height: 1.65;
}

.legal-section {
  margin-bottom: 2.75rem;
}

.legal-section h2 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  margin-top: 0;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--color-border);
}

.legal-section h3 {
  font-size: 1rem;
  margin-top: 1.5rem;
  margin-bottom: 0.6rem;
  color: var(--color-primary);
}

.legal-section p {
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 0.75rem;
}

.legal-section ul,
.legal-section ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

.legal-section li {
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 0.4rem;
}

/* Coverage Map list on editorial-policy page */
.coverage-map-list {
  list-style: none;
  margin-left: 0;
  padding: 0;
}

.coverage-map-list li {
  margin-bottom: 1.25rem;
  padding: 1rem 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.coverage-map-list li .badge {
  display: inline-block;
  margin-bottom: 0.6rem;
}

.coverage-map-list li p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--color-text-body);
}

.legal-meta {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

/* Footer legal links row */
.site-footer__links--legal {
  margin-top: 0.25rem;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}

/* ── Site Footer ─────────────────────────────────────────────── */
.site-footer {
  background: var(--color-primary);
  color: rgba(255,255,255,0.55);
  padding: 2.5rem 1.5rem;
  margin-top: 4rem;
  font-size: 0.82rem;
}

.site-footer__inner {
  max-width: 1160px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.site-footer p { margin: 0; }

.site-footer a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
}

.site-footer a:hover {
  color: #fff;
}

.site-footer__links {
  display: flex;
  gap: 1.5rem;
}

/* ── 404 ─────────────────────────────────────────────────────── */
.not-found {
  text-align: center;
  padding: 5rem 1.5rem;
}

.not-found h1 { font-size: 3rem; color: var(--color-border); }
.not-found p { color: var(--color-muted); }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.25rem; }

  .hero__title { font-size: 1.75rem; }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .post-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .toc {
    position: static;
    background: var(--color-accent-light);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 1rem;
    margin-bottom: 2rem;
  }

  .site-header__logo-name { display: none; }

  .site-footer__links { flex-direction: column; gap: 0.5rem; }

  .stack-panels { grid-template-columns: 1fr; }

  .interactions-table { font-size: 0.8rem; }
}