/* ============================================================
   Metabolic Research Daily — Global Stylesheet
   Domain: metabolicresearchdaily.com
   Pattern: scalphealthresearch.com (adapted teal/amber brand)
   ============================================================ */

/* --- Design Tokens --- */
:root {
  /* Colors */
  --color-primary: #0D4F4F;
  --color-primary-hover: #0A3D3D;
  --color-accent: #D4A017;
  --color-accent-hover: #B8890F;
  --color-bg: #FAFAF8;
  --color-surface: #F5F3F0;
  --color-border: #E8E5E0;
  --color-text: #1A1A1A;
  --color-text-secondary: #5A6B6B;
  --color-muted: #8A9090;
  --color-white: #FFFFFF;
  --color-dark: #1A1A1A;
  --color-rating: #D4A017;
  --color-pro: #5A7C65;
  --color-con: #C41E3A;

  /* Typography */
  --font-heading: 'DM Serif Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --fs-xs: 0.75rem;
  --fs-sm: 0.85rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.35rem;
  --fs-xl: 1.75rem;
  --fs-2xl: 2.25rem;
  --fs-3xl: 2.75rem;
  --fs-4xl: 3.25rem;
  --lh-tight: 1.2;
  --lh-base: 1.6;
  --lh-loose: 1.8;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --container-max: 1100px;
  --container-narrow: 720px;
  --nav-height: 64px;
  --radius: 4px;
  --radius-md: 8px;
  --shadow-card: 0 2px 12px rgba(26, 26, 26, 0.06);
  --shadow-card-hover: 0 2px 16px rgba(26, 26, 26, 0.1);
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;
}

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

html {
  overflow-x: clip;
  overflow-y: auto;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  width: 100%;
}

img, video, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-primary-hover); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: var(--lh-tight);
  color: var(--color-text);
}
h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }

ul, ol { padding-left: 1.5rem; }

/* --- Container --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--narrow {
  max-width: var(--container-narrow);
}

/* --- Navigation --- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-height);
  overflow: visible;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-nav__logo {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
}
.site-nav__logo:hover { color: var(--color-primary-hover); }

.site-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-nav__links a {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}
.site-nav__links a:hover { color: var(--color-primary); }

.site-nav__hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  flex-direction: column;
  gap: 5px;
}

.site-nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-open .site-nav__hamburger span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-open .site-nav__hamburger span:nth-child(2) {
  opacity: 0;
}
.nav-open .site-nav__hamburger span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero --- */
.hero {
  padding: var(--space-5xl) 0 var(--space-4xl);
  text-align: center;
}

.hero h1 {
  margin-bottom: var(--space-md);
}

.hero .subtitle {
  font-size: var(--fs-md);
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto var(--space-xl);
  line-height: var(--lh-loose);
}

.hero-divider {
  width: 60px;
  height: 3px;
  background: var(--color-accent);
  margin: var(--space-xl) auto 0;
}

/* --- Article Layout --- */
.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.article-body {
  min-width: 0;
  word-break: break-word;
}

.article-body p {
  font-size: var(--fs-md);
  line-height: var(--lh-loose);
  margin-bottom: var(--space-lg);
  color: var(--color-text-secondary);
}

.article-body h2 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-primary);
  scroll-margin-top: calc(var(--nav-height) + var(--space-lg));
}

.article-body h3 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  scroll-margin-top: calc(var(--nav-height) + var(--space-lg));
}

.article-body img {
  border-radius: var(--radius-md);
  margin: var(--space-xl) 0;
}

.article-body ul, .article-body ol {
  margin-bottom: var(--space-lg);
  color: var(--color-text-secondary);
  font-size: var(--fs-md);
  line-height: var(--lh-loose);
}

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

/* --- Sidebar TOC --- */
.sidebar-toc {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-lg));
  padding: var(--space-lg);
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  align-self: start;
}

.sidebar-toc h4 {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-muted);
  margin-bottom: var(--space-md);
}

.sidebar-toc ul {
  list-style: none;
  padding: 0;
}

.sidebar-toc li {
  margin-bottom: var(--space-sm);
}

.sidebar-toc a {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  line-height: var(--lh-base);
}
.sidebar-toc a:hover,
.sidebar-toc a.active {
  color: var(--color-primary);
}

/* --- Cards --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}
.card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

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

.card__body {
  padding: var(--space-lg);
}

.card__tag {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.card__title {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  margin-bottom: var(--space-sm);
  line-height: var(--lh-tight);
}

.card__excerpt {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  line-height: var(--lh-base);
}

.card__meta {
  font-size: var(--fs-xs);
  color: var(--color-muted);
  margin-top: var(--space-md);
}

/* --- CTA Buttons --- */
.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.875rem 2rem;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
  text-decoration: none;
  line-height: 1;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(13, 79, 79, 0.3);
  background: var(--color-primary-hover);
  color: var(--color-white);
}

.cta-button--secondary {
  background: transparent;
  color: var(--color-primary);
}
.cta-button--secondary:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.cta-button--accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
}
.cta-button--accent:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  box-shadow: 0 4px 16px rgba(212, 160, 23, 0.3);
}

.cta-button--sm {
  font-size: var(--fs-xs);
  padding: 0.625rem 1.25rem;
}

/* --- Tables --- */
.table-wrapper {
  width: 100%;
  contain: inline-size;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--space-xl) 0;
  position: relative;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.table-wrapper::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 40px;
  height: 100%;
  background: linear-gradient(to right, transparent, rgba(250, 250, 248, 0.9));
  pointer-events: none;
  opacity: 1;
  transition: opacity var(--transition-slow);
}

.table-wrapper.scrolled-end::after {
  opacity: 0;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
}

.comparison-table thead {
  background: var(--color-dark);
  color: var(--color-white);
}

.comparison-table th {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  font-weight: 600;
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.comparison-table td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.comparison-table tbody tr:hover {
  background: rgba(245, 243, 240, 0.5);
}

.comparison-table tbody tr:nth-child(even) {
  background: rgba(250, 250, 248, 0.5);
}

.comparison-table .highlight-row {
  background: rgba(13, 79, 79, 0.06);
  border-left: 3px solid var(--color-primary);
}

/* --- Review Components --- */
.affiliate-disclosure {
  background: var(--color-surface);
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--fs-xs);
  color: var(--color-muted);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.review-meta {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  font-size: var(--fs-sm);
  color: var(--color-muted);
  margin-bottom: var(--space-xl);
}

.rating-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-rating);
  font-weight: 600;
  font-size: var(--fs-md);
}

.rating-badge .stars {
  letter-spacing: 0.1em;
}

.callout-box {
  background: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-xl) 0;
}

.callout-box h3 {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-md);
}

.callout-box p {
  font-size: var(--fs-base);
  line-height: var(--lh-loose);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.callout-box p:last-child { margin-bottom: 0; }

.callout-box strong {
  color: var(--color-text);
}

/* Pros & Cons */
.pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  margin: var(--space-xl) 0;
}

.pros-list, .cons-list {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
}

.pros-list h3, .cons-list h3 {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
}

.pros-list h3 {
  color: var(--color-pro);
  border-bottom: 2px solid var(--color-pro);
}

.cons-list h3 {
  color: var(--color-con);
  border-bottom: 2px solid var(--color-con);
}

.pros-list ul, .cons-list ul {
  list-style: none;
  padding: 0;
}

.pros-list li, .cons-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  font-size: var(--fs-base);
  color: var(--color-text-secondary);
  line-height: var(--lh-base);
}

.pros-list li::before {
  content: '✓';
  color: var(--color-pro);
  font-weight: 700;
  flex-shrink: 0;
}

.cons-list li::before {
  content: '✗';
  color: var(--color-con);
  font-weight: 700;
  flex-shrink: 0;
}

/* Ingredient Cards */
.ingredient-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-card);
}

.ingredient-card h4 {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-sm);
}

.evidence-tag {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius);
  margin-bottom: var(--space-md);
}

.evidence-tag--green {
  background: rgba(90, 124, 101, 0.15);
  color: var(--color-pro);
}

.evidence-tag--yellow {
  background: rgba(212, 160, 23, 0.15);
  color: var(--color-accent);
}

.evidence-tag--red {
  background: rgba(196, 30, 58, 0.15);
  color: var(--color-con);
}

.ingredient-card .research {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  line-height: var(--lh-loose);
  margin-bottom: var(--space-sm);
}

.ingredient-card .our-take {
  font-size: var(--fs-sm);
  color: var(--color-text);
  font-weight: 500;
  font-style: italic;
}

/* Final Verdict */
.verdict-section {
  background: var(--color-dark);
  color: var(--color-white);
  padding: var(--space-3xl) var(--space-xl);
  border-radius: var(--radius-md);
  text-align: center;
  margin: var(--space-2xl) 0;
}

.verdict-section h2 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.verdict-section .rating-badge {
  font-size: var(--fs-2xl);
  margin-bottom: var(--space-lg);
}

.verdict-section p {
  max-width: 640px;
  margin: 0 auto var(--space-lg);
  color: #A0A0A0;
  line-height: var(--lh-loose);
}

.verdict-section .cta-button {
  margin-top: var(--space-md);
}

/* --- Email Capture --- */
.email-capture-section {
  background: var(--color-surface);
  padding: var(--space-3xl) 0;
  text-align: center;
}

.email-capture-section h2 {
  margin-bottom: var(--space-sm);
}

.email-capture-section p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

form.email-capture {
  display: flex;
  max-width: 520px;
  margin: 0 auto;
  gap: var(--space-sm);
  align-items: stretch;
}

form.email-capture input[type="email"] {
  flex: 1;
  padding: 0.875rem var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  background: var(--color-white);
  color: var(--color-text);
  -webkit-appearance: none;
  appearance: none;
}

form.email-capture input[type="email"]:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

form.email-capture .cta-button {
  flex-shrink: 0;
  white-space: nowrap;
}

/* --- FAQ --- */
.faq-section {
  margin: var(--space-2xl) 0;
}

.faq-section > h2 {
  margin-bottom: var(--space-xl);
}

.faq-item {
  margin-bottom: var(--space-md);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.faq-question {
  background: var(--color-surface);
  padding: var(--space-lg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  color: var(--color-text);
  user-select: none;
  transition: background var(--transition-base);
}

.faq-question:hover {
  background: var(--color-border);
}

.faq-toggle {
  color: var(--color-primary);
  font-size: 1.5rem;
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.faq-toggle.open {
  transform: rotate(180deg);
}

.faq-answer {
  background: var(--color-white);
  padding: 0 var(--space-lg);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.faq-answer.open {
  max-height: 1000px;
  padding: var(--space-lg);
}

.faq-answer p {
  font-size: var(--fs-base);
  color: var(--color-text-secondary);
  line-height: var(--lh-loose);
}

/* --- Footer --- */
.site-footer {
  background: var(--color-dark);
  color: #A0A0A0;
  padding: var(--space-3xl) 0 var(--space-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.site-footer h4 {
  font-family: var(--font-body);
  color: var(--color-white);
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.site-footer p {
  font-size: var(--fs-sm);
  line-height: var(--lh-loose);
  margin-bottom: var(--space-md);
}

.site-footer ul {
  list-style: none;
  padding: 0;
}

.site-footer li {
  margin-bottom: var(--space-sm);
}

.site-footer a {
  color: #A0A0A0;
  font-size: var(--fs-sm);
}
.site-footer a:hover { color: var(--color-accent); }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-lg);
  font-size: var(--fs-xs);
  text-align: center;
}

.footer-bottom p {
  margin-bottom: var(--space-sm);
}

/* --- Disclaimers --- */
.disclaimers {
  background: var(--color-surface);
  padding: var(--space-xl);
  border-radius: var(--radius-md);
  margin: var(--space-2xl) 0;
  font-size: var(--fs-xs);
  color: var(--color-muted);
  line-height: var(--lh-loose);
}

.disclaimers p {
  margin-bottom: var(--space-sm);
}
.disclaimers p:last-child { margin-bottom: 0; }

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-card);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--color-primary-hover);
}

/* --- Section Spacing --- */
.section {
  padding: var(--space-3xl) 0;
}

.section--alt {
  background: var(--color-surface);
}

.section__header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section__header h2 {
  margin-bottom: var(--space-sm);
}

.section__header p {
  color: var(--color-text-secondary);
  font-size: var(--fs-md);
}

/* --- Utility --- */
.text-center { text-align: center; }
.text-muted { color: var(--color-muted); }
.text-sm { font-size: var(--fs-sm); }
.text-xs { font-size: var(--fs-xs); }
.mt-xl { margin-top: var(--space-xl); }
.mb-xl { margin-bottom: var(--space-xl); }
.separator { margin: 0 var(--space-sm); color: var(--color-muted); }

/* ============================================================
   RESPONSIVE — Tablet (≤960px)
   ============================================================ */
@media (max-width: 960px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero {
    padding: var(--space-3xl) 0 var(--space-2xl);
  }
}

/* ============================================================
   RESPONSIVE — Mobile (≤768px)
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --fs-4xl: 2rem;
    --fs-3xl: 2rem;
    --fs-2xl: 1.5rem;
    --fs-xl: 1.35rem;
  }

  .container {
    padding: 0 var(--space-md);
  }

  /* Nav */
  .site-nav__links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
  }

  .nav-open .site-nav__links {
    display: flex;
  }

  .site-nav__hamburger {
    display: flex;
  }

  /* Layout */
  .article-layout {
    padding: 0 var(--space-md);
    gap: var(--space-lg);
  }

  .sidebar-toc {
    display: none;
  }

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

  /* Pros/Cons */
  .pros-cons {
    grid-template-columns: 1fr;
  }

  /* Hero */
  .hero {
    padding: var(--space-2xl) 0 var(--space-xl);
  }

  /* Tables */
  .table-wrapper > table {
    width: auto;
    min-width: 580px;
  }

  .comparison-table th,
  .comparison-table td {
    font-size: var(--fs-xs);
    padding: var(--space-sm) var(--space-md);
  }

  /* CTAs */
  .cta-button {
    width: 100%;
    text-align: center;
  }

  /* Email form */
  form.email-capture {
    flex-direction: column;
  }

  form.email-capture .cta-button {
    width: 100%;
    text-align: center;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
  }

  /* Back to top */
  .back-to-top {
    bottom: var(--space-md);
    right: var(--space-md);
  }
}

/* ============================================================
   RESPONSIVE — Small Mobile (≤480px)
   ============================================================ */
@media (max-width: 480px) {
  :root {
    --fs-4xl: 1.75rem;
    --fs-3xl: 1.5rem;
    --fs-2xl: 1.35rem;
  }

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

  .site-footer {
    padding: var(--space-2xl) 0 var(--space-md);
  }
}

/* ============================================================
   DESKTOP ENHANCEMENTS (≥1024px)
   ============================================================ */
@media (min-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr 260px;
  }
}