/* ========================================
   PHYSICIAN HEALTH INSIGHTS — Main Styles
   Art Direction: Clinical authority + warm
   credibility. Deep navy + warm teal accent.
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Inter:wght@400;500;600&display=swap');

/* ---- DESIGN TOKENS ---- */
:root,
[data-theme='light'] {
  /* Surfaces */
  --color-bg: #f8f9fb;
  --color-surface: #ffffff;
  --color-surface-2: #f3f5f8;
  --color-surface-offset: #eaecf0;
  --color-divider: #d8dce4;
  --color-border: #c9cdd8;

  /* Text */
  --color-text: #1a1f2e;
  --color-text-muted: #5a6275;
  --color-text-faint: #9ba3b5;
  --color-text-inverse: #f8f9fb;

  /* Primary Accent — Teal */
  --color-primary: #0b7b82;
  --color-primary-hover: #086069;
  --color-primary-active: #054950;
  --color-primary-highlight: #d0eaec;

  /* Navy — for headings / hero */
  --color-navy: #142240;
  --color-navy-mid: #1e3460;

  /* Warm accent for CTAs */
  --color-cta: #c44b1b;
  --color-cta-hover: #a33916;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Type */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 4.5rem);

  /* Fonts */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(20, 34, 64, 0.06);
  --shadow-md: 0 4px 16px rgba(20, 34, 64, 0.08);
  --shadow-lg: 0 12px 40px rgba(20, 34, 64, 0.12);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Transitions */
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme='dark'] {
  --color-bg: #0e1420;
  --color-surface: #131b2e;
  --color-surface-2: #182035;
  --color-surface-offset: #1d2740;
  --color-divider: #263350;
  --color-border: #304060;
  --color-text: #d4d9e8;
  --color-text-muted: #7b87a0;
  --color-text-faint: #4a5570;
  --color-text-inverse: #0e1420;
  --color-primary: #3da8b0;
  --color-primary-hover: #5bbdc5;
  --color-primary-active: #7ad0d8;
  --color-primary-highlight: #1a3545;
  --color-navy: #eaf0ff;
  --color-navy-mid: #c8d4ee;
  --color-cta: #e07050;
  --color-cta-hover: #f08a68;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
}

/* ---- BASE RESET ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  min-height: 100dvh;
}

img, video { display: block; max-width: 100%; height: auto; }
ul[role='list'], ol[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.2; }
p, li { text-wrap: pretty; }

::selection {
  background: rgba(11,123,130,0.18);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

a, button, [role='button'] {
  transition: color var(--transition), background var(--transition),
    border-color var(--transition), box-shadow var(--transition), opacity var(--transition);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}

/* ---- LAYOUT ---- */
.container {
  width: min(var(--content-default), 100% - var(--space-8));
  margin-inline: auto;
}
.container--wide {
  width: min(var(--content-wide), 100% - var(--space-8));
  margin-inline: auto;
}
.container--narrow {
  width: min(var(--content-narrow), 100% - var(--space-8));
  margin-inline: auto;
}

/* ---- HEADER ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 249, 251, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition);
}

[data-theme='dark'] .site-header {
  background: rgba(14, 20, 32, 0.92);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-navy);
}

.logo-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  object-fit: contain;
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-navy);
  line-height: 1;
}

.logo-sub {
  display: block;
  font-family: var(--font-body);
  font-style: normal;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-links {
  display: flex;
  gap: var(--space-5);
  list-style: none;
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.nav-links a:hover {
  color: var(--color-primary);
}

.btn-subscribe {
  font-size: var(--text-sm);
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  padding: 0.5rem 1.25rem;
  text-decoration: none;
  display: inline-block;
}

.btn-subscribe:hover {
  background: var(--color-primary-hover);
}

.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-muted);
}

.theme-toggle:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
  padding: var(--space-2);
}

@media (max-width: 700px) {
  .nav-links, .btn-subscribe { display: none; }
  .nav-mobile-toggle { display: flex; }
}

/* ---- HERO ---- */
.hero {
  background: var(--color-navy);
  color: #fff;
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 80% at 70% 50%, rgba(11,123,130,0.25) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero-eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  background: rgba(61,168,176,0.15);
  border-radius: var(--radius-full);
  padding: 0.35rem 0.9rem;
  border: 1px solid rgba(61,168,176,0.3);
}

[data-theme='dark'] .hero-eyebrow { color: var(--color-primary); }

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-style: italic;
  color: #fff;
  margin-bottom: var(--space-6);
  line-height: 1.1;
}

.hero h1 em {
  font-style: normal;
  color: var(--color-primary);
}

[data-theme='dark'] .hero h1 em { color: #3da8b0; }

.hero-desc {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.75);
  max-width: 48ch;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.btn-primary {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-navy);
  background: #fff;
  border-radius: var(--radius-full);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  display: inline-block;
}

.btn-primary:hover {
  background: var(--color-primary-highlight);
}

.btn-ghost {
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-full);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  display: inline-block;
}

.btn-ghost:hover {
  border-color: rgba(255,255,255,0.6);
  color: #fff;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-8);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.55);
}

.hero-trust-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.hero-image-wrap {
  position: relative;
}

.hero-image-wrap img {
  border-radius: var(--radius-xl);
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  box-shadow: var(--shadow-lg);
}

.hero-stat-card {
  position: absolute;
  bottom: -var(--space-4);
  left: -var(--space-8);
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 160px;
}

.hero-stat-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-navy);
  font-style: italic;
}

[data-theme='dark'] .hero-stat-number { color: var(--color-primary); }

.hero-stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-image-wrap { display: none; }
}

/* ---- TICKER / DISCLAIMER BAR ---- */
.disclaimer-bar {
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-2) 0;
  font-size: var(--text-xs);
  text-align: center;
  letter-spacing: 0.02em;
}

/* ---- SECTION TITLES ---- */
.section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: italic;
  color: var(--color-navy);
  margin-bottom: var(--space-4);
}

[data-theme='dark'] .section-title { color: var(--color-navy); }

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 52ch;
  line-height: 1.7;
}

/* ---- FEATURED ARTICLES ---- */
.articles-section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

.articles-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: var(--space-10);
  gap: var(--space-6);
}

.view-all {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  white-space: nowrap;
}

.view-all:hover { color: var(--color-primary-hover); }

/* Feature grid: large card + 2 smaller */
.articles-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: var(--space-6);
}

.article-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
  text-decoration: none;
  color: inherit;
}

.article-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.article-card--featured {
  grid-row: 1 / 3;
}

.article-card__img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.article-card--featured .article-card__img {
  aspect-ratio: 4/3;
}

.article-card__body {
  padding: var(--space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card__category {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.article-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-navy);
  margin-bottom: var(--space-3);
  line-height: 1.25;
}

[data-theme='dark'] .article-card__title { color: var(--color-navy); }

.article-card--featured .article-card__title {
  font-size: var(--text-xl);
}

.article-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  flex: 1;
}

.article-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-5);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-4);
}

.article-card__author {
  font-weight: 600;
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .articles-grid { grid-template-columns: 1fr; }
  .article-card--featured { grid-row: auto; }
}

/* ---- CATEGORIES STRIP ---- */
.categories-section {
  background: var(--color-surface-2);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
  padding-block: var(--space-12);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-4);
}

.category-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-4);
  border: 1px solid var(--color-border);
  text-align: center;
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.category-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.category-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-primary-highlight);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.category-card__name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.category-card__count {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ---- ABOUT DR. WILLIAMS ---- */
.about-section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.about-img-wrap img {
  width: 100%;
  border-radius: var(--radius-xl);
  aspect-ratio: 3/4;
  object-fit: cover;
  box-shadow: var(--shadow-lg);
}

.about-credentials {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.credential-badge {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.credential-badge svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-img-wrap { display: none; }
}

/* ---- NEWSLETTER ---- */
.newsletter-section {
  background: var(--color-navy);
  color: #fff;
  padding-block: clamp(var(--space-12), 8vw, var(--space-20));
}

.newsletter-inner {
  max-width: 560px;
  text-align: center;
  margin: 0 auto;
}

.newsletter-section .section-label { color: var(--color-primary); }

.newsletter-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-style: italic;
  color: #fff;
  margin-bottom: var(--space-4);
}

.newsletter-section p {
  color: rgba(255,255,255,0.7);
  margin-bottom: var(--space-8);
  font-size: var(--text-base);
  line-height: 1.7;
}

.newsletter-form {
  display: flex;
  gap: var(--space-3);
  max-width: 420px;
  margin: 0 auto;
}

.newsletter-input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-full);
  color: #fff;
  font-size: var(--text-sm);
  outline: none;
}

.newsletter-input::placeholder { color: rgba(255,255,255,0.4); }

.newsletter-input:focus {
  border-color: var(--color-primary);
}

.newsletter-btn {
  padding: 0.75rem 1.25rem;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.newsletter-btn:hover { background: var(--color-primary-hover); }

.newsletter-disclaimer {
  margin-top: var(--space-4);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
}

@media (max-width: 500px) {
  .newsletter-form { flex-direction: column; }
}

/* ---- ARTICLE PAGE ---- */
.article-hero {
  background: var(--color-navy);
  color: #fff;
  padding-block: var(--space-16) var(--space-12);
}

.article-breadcrumb {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
  margin-bottom: var(--space-5);
  display: flex;
  gap: var(--space-2);
}

.article-breadcrumb a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
}

.article-breadcrumb a:hover { color: var(--color-primary); }

.article-category-pill {
  display: inline-block;
  background: rgba(61,168,176,0.2);
  border: 1px solid rgba(61,168,176,0.35);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  padding: 0.3rem 0.8rem;
  margin-bottom: var(--space-4);
}

.article-hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-style: italic;
  color: #fff;
  margin-bottom: var(--space-5);
  max-width: 20ch;
}

.article-hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
}

.article-hero-meta .author {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255,255,255,0.9);
  font-weight: 500;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-16);
  align-items: start;
  padding-block: var(--space-12);
}

.article-body {
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.1rem);
  line-height: 1.75;
  color: var(--color-text);
}

.article-body h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: italic;
  color: var(--color-navy);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-primary-highlight);
}

[data-theme='dark'] .article-body h2 { color: var(--color-navy); }

.article-body h3 {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.article-body p { margin-bottom: var(--space-5); max-width: 65ch; }

.article-body ul, .article-body ol {
  margin: var(--space-4) 0 var(--space-5) var(--space-6);
}

.article-body li { margin-bottom: var(--space-2); }

.article-body img {
  border-radius: var(--radius-lg);
  margin-block: var(--space-8);
  width: 100%;
}

.article-body strong { color: var(--color-navy); }
[data-theme='dark'] .article-body strong { color: var(--color-navy); }

.article-body blockquote {
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-6);
  margin: var(--space-8) 0;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-navy);
}

[data-theme='dark'] .article-body blockquote { color: var(--color-primary); }

.article-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.article-body a:hover { color: var(--color-primary-hover); }

/* Affiliate callout box */
.affiliate-box {
  background: var(--color-primary-highlight);
  border: 1px solid rgba(11,123,130,0.2);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  margin: var(--space-8) 0;
}

[data-theme='dark'] .affiliate-box { background: rgba(61,168,176,0.08); }

.affiliate-box__label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.affiliate-box__title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-navy);
  margin-bottom: var(--space-2);
}

[data-theme='dark'] .affiliate-box__title { color: var(--color-primary); }

.affiliate-box p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.affiliate-btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-full);
  padding: 0.55rem 1.2rem;
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
}

.affiliate-btn:hover { background: var(--color-primary-hover); }

/* Sidebar */
.article-sidebar {
  position: sticky;
  top: var(--space-20);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.sidebar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
}

.sidebar-card h3 {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-base);
  color: var(--color-navy);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
}

[data-theme='dark'] .sidebar-card h3 { color: var(--color-navy); }

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.toc-list a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  display: block;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-divider);
}

.toc-list a:hover { color: var(--color-primary); }

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

.affiliate-sidebar-card {
  background: var(--color-navy);
  color: #fff;
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  text-align: center;
}

.affiliate-sidebar-card h3 {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
  color: #fff;
  border: none;
  margin-bottom: var(--space-3);
  padding: 0;
}

.affiliate-sidebar-card p {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.65);
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

@media (max-width: 900px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: none; }
}

/* ---- DISCLAIMER ---- */
.medical-disclaimer {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-cta);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  margin-block: var(--space-8);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

.medical-disclaimer strong { color: var(--color-cta); }

/* ---- FOOTER ---- */
.site-footer {
  background: var(--color-navy);
  color: rgba(255,255,255,0.6);
  padding-block: var(--space-16) var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-brand p {
  font-size: var(--text-sm);
  line-height: 1.7;
  margin-top: var(--space-4);
  max-width: 38ch;
}

.footer-brand .site-logo { margin-bottom: 0; }

.footer-col h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: #fff;
  margin-bottom: var(--space-4);
  letter-spacing: 0.04em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
  text-decoration: none;
}

.footer-links a:hover { color: var(--color-primary); }

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
}

.footer-affiliate-notice {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
  max-width: 60ch;
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---- UTILITY ---- */
.text-primary { color: var(--color-primary); }
.text-navy { color: var(--color-navy); }
.mt-auto { margin-top: auto; }