/* ═══ PeptideReconstitute.com — Blog & Pages Theme ═══ */
/* Matches tool app: light default, dark via prefers-color-scheme */
:root {
  --primary: #06b6d4;
  --primary-dark: #0891b2;
  --secondary: #14b8a6;
  --bg: #f0f4f8;
  --bg-card: #fff;
  --bg-card-hover: #f8fafc;
  --text: #1a1a2e;
  --text-secondary: #5a607f;
  --text-muted: #6b7280;
  --border: #e2e8f0;
  --radius: 14px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', monospace;
  --shadow: 0 2px 12px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
  --shadow-hover: 0 8px 24px rgba(0,0,0,0.1), 0 2px 6px rgba(0,0,0,0.06);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background-color: #f0f4f8 !important;
  color: #1a1a2e !important;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  background-image: radial-gradient(circle, rgba(0,0,0,3%) 1px, transparent 1px);
  background-size: 20px 20px;
  color-scheme: light;
}

a { color: var(--primary); text-decoration: none; transition: color .15s; }
a:hover { color: var(--primary-dark); }

/* ─── Header ─── */
.site-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.header-inner {
  max-width: 1200px; margin: 0 auto;
  padding: 0 24px; height: 56px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  color: var(--primary); font-weight: 600; font-size: 15px;
  text-decoration: none;
}
.main-nav { display: flex; gap: 24px; }
.nav-link {
  color: var(--text-secondary); font-size: 14px; font-weight: 500;
  transition: color .15s; padding: 4px 0;
}
.nav-link:hover, .nav-link.active { color: var(--primary); }
.mobile-menu-btn { display: none; background: none; border: none; color: var(--text); cursor: pointer; }

/* ─── Footer ─── */
.site-footer {
  background: #fff !important; border-top: 1px solid #e2e8f0;
  padding: 48px 24px 32px; margin-top: 64px;
  box-shadow: 0 -1px 3px rgba(0,0,0,0.03);
}
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 32px; }
.footer-col h4 { color: var(--primary); font-size: 14px; margin-bottom: 12px; text-transform: uppercase; letter-spacing: .5px; }
.footer-col p { color: var(--text-secondary); font-size: 13px; line-height: 1.7; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: var(--text-secondary); font-size: 13px; }
.footer-col a:hover { color: var(--primary); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 24px; text-align: center; }
.footer-bottom p { color: var(--text-muted); font-size: 12px; margin-bottom: 4px; }
.footer-bottom a { color: var(--primary); }
.disclaimer { font-style: italic; }

/* ─── Blog List ─── */
.list-page { max-width: 800px; margin: 0 auto; padding: 48px 24px; }
.list-header { margin-bottom: 40px; }
.list-header h1 { font-size: 32px; font-weight: 700; margin-bottom: 8px; }
.list-header p { color: var(--text-secondary); font-size: 16px; }
.list-grid { display: flex; flex-direction: column; gap: 16px; }
.post-card {
  background: #fff !important; border: 1px solid #e2e8f0;
  border-radius: var(--radius); padding: 24px;
  transition: border-color .2s, transform .2s, box-shadow .2s;
  box-shadow: var(--shadow);
}
.post-card:hover { border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.post-card a { color: inherit; text-decoration: none; display: block; }
.post-card h2 { font-size: 20px; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.post-meta { color: var(--text-muted); font-size: 13px; margin-bottom: 8px; display: flex; gap: 8px; align-items: center; }
.post-excerpt { color: var(--text-secondary); font-size: 14px; margin-bottom: 12px; }
.read-more { color: var(--primary); font-size: 14px; font-weight: 500; }

/* ─── Article ─── */
.article-page { max-width: 1200px; margin: 0 auto; padding: 48px 24px; }
.article-layout { display: grid; grid-template-columns: 1fr 300px; gap: 48px; }
.article-header { margin-bottom: 32px; }
.article-header h1 { font-size: 36px; font-weight: 700; line-height: 1.2; margin-bottom: 12px; }
.article-meta { color: var(--text-muted); font-size: 14px; display: flex; gap: 8px; align-items: center; }
.separator { color: var(--border); }
.article-excerpt { font-size: 18px; color: var(--text-secondary); margin-bottom: 24px; line-height: 1.6; border-left: 3px solid var(--primary); padding-left: 16px; }

/* TOC */
.toc {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 24px; margin-bottom: 32px;
  box-shadow: var(--shadow);
}
.toc h2 { font-size: 14px; text-transform: uppercase; letter-spacing: .5px; color: var(--primary); margin-bottom: 12px; }
.toc ul { list-style: none; }
.toc li { margin-bottom: 6px; }
.toc a { color: var(--text-secondary); font-size: 14px; }
.toc a:hover { color: var(--primary); }
.toc ul ul { padding-left: 16px; }

/* Article body */
.article-body h2 { font-size: 24px; font-weight: 600; margin: 40px 0 16px; padding-top: 16px; border-top: 1px solid var(--border); }
.article-body h3 { font-size: 20px; font-weight: 600; margin: 32px 0 12px; }
.article-body p { margin-bottom: 16px; color: var(--text); font-size: 16px; }
.article-body ul, .article-body ol { margin: 0 0 16px 24px; }
.article-body li { margin-bottom: 8px; color: var(--text); font-size: 15px; }
.article-body strong { color: var(--text); font-weight: 600; }
.article-body code { font-family: var(--mono); background: rgba(6,182,212,.06); padding: 2px 6px; border-radius: 4px; font-size: 14px; border: 1px solid rgba(6,182,212,.1); }
.article-body blockquote {
  border-left: 3px solid var(--primary); padding: 12px 20px; margin: 16px 0;
  background: rgba(6,182,212,.04); border-radius: 0 var(--radius) var(--radius) 0;
}
.article-body blockquote p { color: var(--text-secondary); margin: 0; }
.article-body table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.article-body th { text-align: left; padding: 10px 12px; font-size: 13px; font-weight: 600; color: var(--text-secondary); border-bottom: 2px solid var(--border); }
.article-body td { padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; }
.article-body tr:hover { background: rgba(6,182,212,.03); }

/* CTA */
.article-cta {
  background: linear-gradient(135deg, rgba(6,182,212,.06), rgba(20,184,166,.04));
  border: 1px solid rgba(6,182,212,.15); border-radius: var(--radius);
  padding: 24px; margin-top: 40px; text-align: center;
  box-shadow: var(--shadow);
}
.article-cta h3 { font-size: 20px; margin-bottom: 8px; }
.article-cta p { color: var(--text-secondary); margin-bottom: 16px; }
.cta-btn {
  display: inline-block; padding: 12px 28px;
  background: var(--primary); color: #fff; border-radius: 10px;
  font-weight: 600; font-size: 15px; transition: all .2s;
}
.cta-btn:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(6,182,212,.3); }

/* Sidebar */
.article-sidebar { position: sticky; top: 72px; align-self: start; }
.sidebar-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.sidebar-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 12px; }
.sidebar-card ul { list-style: none; }
.sidebar-card li { margin-bottom: 8px; }
.sidebar-card a { color: var(--text-secondary); font-size: 14px; }
.sidebar-card a:hover { color: var(--primary); }
.cta-card { background: linear-gradient(135deg, rgba(6,182,212,.06), rgba(20,184,166,.04)); border-color: rgba(6,182,212,.15); }
.cta-card p { color: var(--text-secondary); font-size: 13px; margin-bottom: 12px; }
.cta-btn-sm {
  display: inline-block; padding: 8px 16px;
  background: var(--primary); color: #fff; border-radius: 8px;
  font-size: 13px; font-weight: 500;
}
.cta-btn-sm:hover { background: var(--primary-dark); color: #fff; }

/* ─── About page ─── */
.about-page { max-width: 700px; margin: 0 auto; padding: 48px 24px; }
.about-page h1 { font-size: 32px; margin-bottom: 16px; }
.about-page p, .about-page li { color: var(--text-secondary); font-size: 16px; line-height: 1.7; }
.about-page h2 { font-size: 22px; margin: 32px 0 12px; color: var(--text); }

/* ─── Dark Mode ─── */


/* ─── Responsive ─── */
@media (max-width: 768px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
  .article-header h1 { font-size: 28px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .main-nav { display: none; position: absolute; top: 56px; left: 0; right: 0; background: var(--bg-card); border-bottom: 1px solid var(--border); flex-direction: column; padding: 16px 24px; gap: 12px; }
  .main-nav.open { display: flex; }
  .mobile-menu-btn { display: block; }
}