/* ========== Google Fonts ========== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Merriweather:ital,wght@0,400;0,700;1,400&family=Space+Grotesk:wght@500;600;700&display=swap');

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

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #555770;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-border: #e5e7eb;
  --color-surface: #f8f9fb;
  --color-accent: #0ea5e9;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Merriweather', Georgia, 'Times New Roman', serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --max-width: 720px;
  --max-width-wide: 960px;
}

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;
}

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

img { max-width: 100%; height: auto; }

/* ========== Layout ========== */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 0;
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  z-index: 100;
}

.site-header .container {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.03em;
  display: inline-flex;
  align-items: center;
  gap: 0;
}

.site-logo .logo-rx {
  font-weight: 500;
  color: var(--color-primary);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-right: 1px;
}

.site-logo .logo-glasses {
  font-weight: 700;
  background: linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.site-logo .logo-guide {
  font-weight: 500;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-left: 1px;
}

.site-nav { display: flex; gap: 1.5rem; align-items: center; }

.site-nav a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.site-nav a:hover { color: var(--color-primary); text-decoration: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-wide {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ========== Home Page ========== */
.hero {
  padding: 4rem 0 3rem;
  text-align: center;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.04em;
  margin-bottom: 1rem;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, #2563eb 0%, #0ea5e9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 540px;
  margin: 0 auto 2rem;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  margin-top: 2rem;
}

.hero-stats .stat { text-align: center; }
.hero-stats .stat-number {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
}
.hero-stats .stat-label {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

/* ========== Article Cards ========== */
.articles-grid {
  display: grid;
  gap: 1.5rem;
}

.article-card {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: box-shadow 0.2s, border-color 0.2s;
  display: block;
  color: inherit;
}

.article-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  border-color: var(--color-primary);
  text-decoration: none;
  color: inherit;
}

.article-card .tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  background: #eff6ff;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.75rem;
}

.article-card h2 {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.article-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.article-card .meta {
  font-size: 0.8rem;
  color: #9ca3af;
  margin-top: 0.75rem;
}

/* ========== Article Page ========== */
.article-header {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2rem;
}

.article-header .tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  background: #eff6ff;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.75rem;
}

.article-header h1 {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.04em;
  margin-bottom: 0.75rem;
}

.article-header .subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.article-header .meta {
  font-size: 0.85rem;
  color: #9ca3af;
}

/* Direct Answer Box - TL;DR for AI */
.direct-answer {
  background: linear-gradient(135deg, #eff6ff 0%, #f0f9ff 100%);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 8px 8px 0;
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  font-size: 0.95rem;
  line-height: 1.7;
}

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

/* TL;DR Recommendation - Plain language action items */
.tldr-recommendation {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
}

.tldr-recommendation .tldr-heading {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #15803d;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.tldr-recommendation ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tldr-recommendation li {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text);
  padding: 0.3rem 0;
  padding-left: 1.5rem;
  position: relative;
}

.tldr-recommendation li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: #15803d;
  font-weight: 600;
}

/* Article Content */
.article-content {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.85;
}

.article-content h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  letter-spacing: -0.03em;
}

.article-content h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
}

.article-content p { margin-bottom: 1.25rem; }

.article-content ul, .article-content ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.article-content li { margin-bottom: 0.5rem; }

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.article-content table th,
.article-content table td {
  border: 1px solid var(--color-border);
  padding: 0.6rem 0.8rem;
  text-align: left;
}

.article-content table th {
  background: var(--color-surface);
  font-weight: 600;
}

.article-content table tr:nth-child(even) td {
  background: #fafbfc;
}

.article-content blockquote {
  border-left: 3px solid var(--color-primary);
  padding-left: 1rem;
  margin: 1.5rem 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

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

.faq-section h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: var(--color-surface);
  border: none;
  padding: 1rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-sans);
  color: var(--color-text);
  transition: background 0.2s;
}

.faq-question:hover { background: #eef1f6; }

.faq-question::after {
  content: '+';
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--color-primary);
  transition: transform 0.2s;
}

.faq-item.open .faq-question::after { transform: rotate(45deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 1.25rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0.75rem 1.25rem 1rem;
}

/* ========== Footer ========== */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  margin-top: 4rem;
  text-align: center;
  font-size: 0.8rem;
  color: #9ca3af;
}

.site-footer a { color: var(--color-text-secondary); }

/* ========== Responsive ========== */
@media (max-width: 640px) {
  .hero h1 { font-size: 1.85rem; }
  .hero-stats { flex-direction: column; gap: 1rem; }
  .article-header h1 { font-size: 1.5rem; }
  .site-nav { gap: 1rem; }
  .site-nav a { font-size: 0.8rem; }
  .site-logo { font-size: 1.1rem; }
  .site-logo .logo-rx { font-size: 0.9rem; }
  .site-logo .logo-guide { font-size: 0.8rem; }
}