/* ==========================================================================
   Family Health Blog — Stylesheet
   Mobile-first, responsive design
   ========================================================================== */

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

:root {
  --color-primary: #2c7a7b;
  --color-primary-dark: #1a5c5d;
  --color-accent: #e8a838;
  --color-bg: #fefefe;
  --color-surface: #ffffff;
  --color-text: #2d3748;
  --color-text-light: #718096;
  --color-border: #e2e8f0;
  --color-disclaimer-bg: #fffbeb;
  --color-disclaimer-border: #f59e0b;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
  --max-width: 768px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* --- Header --- */
.site-header {
  background: var(--color-primary);
  color: #fff;
  padding: var(--spacing-sm) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.site-header .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-xs);
}

.site-logo {
  color: #fff;
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 700;
}

.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.site-nav a {
  color: rgba(255,255,255,0.9);
  text-decoration: none;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.875rem;
  transition: background 0.2s;
}

.site-nav a:hover,
.site-nav a:focus {
  background: rgba(255,255,255,0.15);
  color: #fff;
}

/* --- Main --- */
main {
  padding: var(--spacing-lg) 0 var(--spacing-xl);
  min-height: 60vh;
}

/* --- Hero (Homepage) --- */
.hero {
  text-align: center;
  padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.hero h1 {
  font-size: 2rem;
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-xs);
}

.hero p {
  font-size: 1.125rem;
  color: var(--color-text-light);
  max-width: 480px;
  margin: 0 auto;
}

/* --- Post Cards (Homepage) --- */
.post-list h2 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-primary-dark);
  border-bottom: 3px solid var(--color-accent);
  padding-bottom: var(--spacing-xs);
}

.post-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  transition: box-shadow 0.2s;
}

.post-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.post-card h2 {
  font-size: 1.25rem;
  border: none;
  margin-bottom: 0.25rem;
  padding: 0;
}

.post-card h2 a {
  color: var(--color-primary-dark);
  text-decoration: none;
}

.post-card h2 a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.post-meta {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xs);
}

.category-tag a {
  background: var(--color-accent);
  color: #fff;
  padding: 0.125rem 0.5rem;
  border-radius: 12px;
  font-size: 0.75rem;
  text-decoration: none;
  font-weight: 600;
}

.read-more {
  display: inline-block;
  margin-top: var(--spacing-xs);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
}

.read-more:hover {
  text-decoration: underline;
}

/* --- Single Post --- */
.post {
  max-width: var(--max-width);
  margin: 0 auto;
}

.post > h1 {
  font-size: 1.75rem;
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
}

.post h2 {
  font-size: 1.375rem;
  color: var(--color-primary-dark);
  margin: var(--spacing-lg) 0 var(--spacing-sm);
  padding-bottom: 0.25rem;
  border-bottom: 2px solid var(--color-border);
}

.post h3 {
  font-size: 1.125rem;
  color: var(--color-text);
  margin: var(--spacing-md) 0 var(--spacing-xs);
}

.post p {
  margin-bottom: var(--spacing-sm);
}

.post ul, .post ol {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
}

.post li {
  margin-bottom: 0.375rem;
}

.post table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-sm) 0 var(--spacing-md);
  font-size: 0.9375rem;
  overflow-x: auto;
  display: block;
}

.post th, .post td {
  border: 1px solid var(--color-border);
  padding: 0.5rem 0.75rem;
  text-align: left;
}

.post th {
  background: #f7fafc;
  font-weight: 600;
}

.post blockquote {
  border-left: 4px solid var(--color-accent);
  padding: var(--spacing-xs) var(--spacing-sm);
  margin: var(--spacing-sm) 0;
  background: #fffdf5;
  font-style: italic;
  color: #4a5568;
}

.post blockquote p:last-child {
  margin-bottom: 0;
}

.post strong {
  color: var(--color-primary-dark);
}

.post code {
  background: #f7fafc;
  padding: 0.125rem 0.375rem;
  border-radius: 3px;
  font-size: 0.875em;
}

.post hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-lg) 0;
}

.post a {
  color: var(--color-primary);
  word-break: break-word;
}

.post a:hover {
  color: var(--color-primary-dark);
}

/* --- Disclaimer Box --- */
.disclaimer-box {
  background: var(--color-disclaimer-bg);
  border: 2px solid var(--color-disclaimer-border);
  border-radius: 8px;
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0 var(--spacing-sm);
  font-size: 0.9375rem;
  text-align: center;
}

.disclaimer-box p {
  margin: 0;
  color: #92400e;
}

.disclaimer-box strong {
  color: #b45309;
}

/* --- Category Page --- */
.category-page h1 {
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
}

/* --- 404 Page --- */
.not-found {
  text-align: center;
  padding: var(--spacing-xl) 0;
}

.not-found h1 {
  font-size: 2rem;
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-sm);
}

/* --- Footer --- */
.site-footer {
  background: #f7fafc;
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

/* --- Mobile < 768px (default mobile-first) --- */
@media (max-width: 767px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav ul {
    flex-wrap: wrap;
    gap: 0;
  }

  .site-nav a {
    font-size: 0.8125rem;
    padding: 0.25rem 0.375rem;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .post > h1 {
    font-size: 1.375rem;
  }

  .post h2 {
    font-size: 1.125rem;
  }

  .post h3 {
    font-size: 1rem;
  }

  .post table {
    font-size: 0.8125rem;
  }

  .post-card h2 {
    font-size: 1.125rem;
  }
}

/* --- Tablet 768px–1023px --- */
@media (min-width: 768px) and (max-width: 1023px) {
  :root {
    --max-width: 720px;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .post > h1 {
    font-size: 1.625rem;
  }
}

/* --- Desktop ≥ 1024px --- */
@media (min-width: 1024px) {
  :root {
    --max-width: 800px;
  }

  .hero {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .post > h1 {
    font-size: 1.875rem;
  }

  .post h2 {
    font-size: 1.5rem;
  }

  .post h3 {
    font-size: 1.25rem;
  }
}

/* --- Print --- */
@media print {
  .site-header, .site-footer, .site-nav { display: none; }
  body { font-size: 12pt; }
  .disclaimer-box { border: 1px solid #000; }
}