/* ==========================================================================
   Optic Notes — opticnotes.ca
   A premium editorial blog for eye health and optical knowledge.
   ========================================================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Palette — warm, sophisticated, editorial */
  --color-bg:          #FAFAF7;
  --color-bg-alt:      #F3F1EC;
  --color-bg-card:     #FFFFFF;
  --color-surface:     #EDEAE4;

  --color-text:        #2C2924;
  --color-text-secondary: #6B6560;
  --color-text-tertiary:  #9B9590;

  --color-accent:      #C4622A;      /* warm terracotta */
  --color-accent-hover:#A8501E;
  --color-accent-light:#FDF0E8;

  --color-border:      #E4E0DA;
  --color-border-light:#EDEBE6;

  /* Typography */
  --font-display: 'Radio Canada Big', 'Radio Canada', Georgia, serif;
  --font-body:    'Radio Canada', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Sizing */
  --content-width:  720px;
  --wide-width:    1200px;
  --gutter:          20px;

  /* Transitions */
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg:          #1A1917;
    --color-bg-alt:      #222120;
    --color-bg-card:     #252321;
    --color-surface:     #302E2A;

    --color-text:        #EDE9E3;
    --color-text-secondary: #A09A94;
    --color-text-tertiary:  #6B6560;

    --color-accent:      #D4773F;
    --color-accent-hover:#E08A52;
    --color-accent-light:#2E2218;

    --color-border:      #3A3733;
    --color-border-light:#302E2A;
  }

  .article-content thead {
    background: #C4622A;
    color: #fff;
  }

  .article-content tbody tr {
    background: #1E1D1B;
  }

  .article-content tbody tr:nth-child(even) {
    background: #2A2826;
  }

  .article-content tbody tr:hover {
    background: #352A1F;
  }

  .article-content tbody td {
    border-bottom-color: #333130;
  }

  .article-content table {
    box-shadow: 0 1px 3px rgba(0,0,0,0.3), 0 4px 16px rgba(0,0,0,0.2);
    border: 1px solid #333130;
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

::selection {
  background: var(--color-accent);
  color: #fff;
}

/* ---------- Utilities ---------- */
.container {
  width: 100%;
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

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

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

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

/* ---------- Navigation ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #101110;
  border-bottom: 1px solid #101110;
  transition: box-shadow 0.3s var(--ease-out);
}

.nav--scrolled {
  box-shadow: 0 1px 12px rgba(0,0,0,0.2);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav__brand {
  display: flex;
  align-items: center;
  transition: opacity 0.2s;
}

.nav__brand:hover {
  opacity: 0.7;
}

.nav__logo {
  height: 64px;
  width: auto;
  object-fit: contain;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav__links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255,255,255,0.65);
  transition: color 0.2s;
  letter-spacing: 0.01em;
}

.nav__links a:hover,
.nav__links a.active {
  color: #fff;
}

.nav__mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: background 0.2s;
}

.nav__mobile-toggle:hover {
  background: rgba(255,255,255,0.1);
}

.nav__mobile-toggle svg {
  width: 22px;
  height: 22px;
  stroke: #fff;
  stroke-width: 1.8;
  fill: none;
}

@media (max-width: 640px) {
  .nav__links { display: none; }
  .nav__mobile-toggle { display: flex; }

  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 20px var(--gutter);
    gap: 16px;
    animation: slideDown 0.25s var(--ease-out);
  }

  .nav__links.open a {
    font-size: 1rem;
    padding: 8px 0;
  }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Hero ---------- */
.hero {
  padding: 80px 0 64px;
  text-align: center;
}

@media (min-width: 641px) {
  .hero { padding: 120px 0 80px; }
}

.hero__tagline {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.05;
  margin-bottom: 20px;
}

.hero__subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--color-text-secondary);
  max-width: 540px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ---------- Category Filter ---------- */
.categories {
  padding: 0 0 48px;
}

.categories__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 4px;
  justify-content: center;
  flex-wrap: wrap;
}

.categories__list::-webkit-scrollbar { display: none; }

.category-btn {
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: 100px;
  white-space: nowrap;
  color: var(--color-text-secondary);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  transition: all 0.2s var(--ease-out);
}

.category-btn:hover {
  border-color: var(--color-text-tertiary);
  color: var(--color-text);
}

.category-btn.active {
  background: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}

/* ---------- Post Grid ---------- */
.posts-section {
  padding-bottom: 80px;
}

.posts-grid {
  display: grid;
  gap: 24px;
}

@media (min-width: 641px) {
  .posts-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 960px) {
  .posts-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- Post Card ---------- */
.post-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
  display: flex;
  flex-direction: column;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
}

@media (prefers-color-scheme: dark) {
  .post-card:hover {
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
  }
}

.post-card__image {
  aspect-ratio: 16 / 10;
  background: var(--color-surface);
  overflow: hidden;
  position: relative;
}

.post-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}

.post-card:hover .post-card__image img {
  transform: scale(1.04);
}

/* Category-based gradient backgrounds — each topic has a meaningful palette */
.post-card__image--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: rgba(255,255,255,0.6);
  position: relative;
  overflow: hidden;
}

/* Subtle noise texture overlay for depth */
.post-card__image--placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 70%, rgba(255,255,255,0.08) 0%, transparent 60%);
  pointer-events: none;
}

/* Eye Health — warm coral to soft rose (warmth of care) */
.grad-eye-health {
  background: linear-gradient(135deg, #E07A5F 0%, #D4A0A0 50%, #C27BA0 100%);
}

/* Dry Eye — cool blue to soft teal (water, moisture, relief) */
.grad-dry-eye {
  background: linear-gradient(135deg, #5B9EA6 0%, #7EC8C8 50%, #A8DADC 100%);
}

/* Lenses — deep indigo to crisp blue (precision, clarity, glass) */
.grad-lenses {
  background: linear-gradient(135deg, #3D405B 0%, #5C6BC0 50%, #7986CB 100%);
}

/* Style / Frames — warm gold to amber (fashion, confidence) */
.grad-style {
  background: linear-gradient(135deg, #C4622A 0%, #D4956B 50%, #E8C07A 100%);
}

/* Insurance / Coverage — forest green to sage (money, security, trust) */
.grad-insurance {
  background: linear-gradient(135deg, #2D6A4F 0%, #52796F 50%, #84A98C 100%);
}

/* Kids Vision — soft purple to lavender (playful, gentle, growth) */
.grad-kids {
  background: linear-gradient(135deg, #7B5EA7 0%, #9B8EC4 50%, #C3AED6 100%);
}

/* Safety / Workplace — slate to steel blue (industrial, protective) */
.grad-safety {
  background: linear-gradient(135deg, #37474F 0%, #546E7A 50%, #78909C 100%);
}

/* Conditions / Medical — deep teal to mint (clinical but warm) */
.grad-conditions {
  background: linear-gradient(135deg, #00695C 0%, #26A69A 50%, #80CBC4 100%);
}

/* Products / Reviews — charcoal to warm gray (neutral, unbiased) */
.grad-products {
  background: linear-gradient(135deg, #424242 0%, #757575 50%, #9E9E9E 100%);
}

/* General / Misc — warm earth tones (grounded, approachable) */
.grad-general {
  background: linear-gradient(135deg, #8D6E63 0%, #A1887F 50%, #BCAAA4 100%);
}

.post-card__body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 0.8125rem;
}

.post-card__category {
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
}

.post-card__date,
.post-card__read-time {
  color: var(--color-text-tertiary);
}

.post-card__dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-text-tertiary);
  flex-shrink: 0;
}

.post-card__title {
  font-size: 1.3rem;
  line-height: 1.25;
  margin-bottom: 10px;
  transition: color 0.2s;
}

.post-card:hover .post-card__title {
  color: var(--color-accent);
}

.post-card__excerpt {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Featured (first) card — spans full width */
@media (min-width: 960px) {
  .post-card--featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
  }

  .post-card--featured .post-card__image {
    aspect-ratio: auto;
    min-height: 340px;
  }

  .post-card--featured .post-card__body {
    padding: 40px;
    justify-content: center;
  }

  .post-card--featured .post-card__title {
    font-size: 2rem;
    margin-bottom: 16px;
  }

  .post-card--featured .post-card__excerpt {
    -webkit-line-clamp: 4;
    font-size: 1rem;
  }
}

/* ---------- Newsletter ---------- */
.newsletter {
  padding: 80px 0;
  text-align: center;
}

.newsletter__inner {
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: 56px 32px;
  max-width: 640px;
  margin: 0 auto;
  border: 1px solid var(--color-border-light);
}

.newsletter__title {
  font-size: 1.75rem;
  margin-bottom: 10px;
}

.newsletter__text {
  color: var(--color-text-secondary);
  margin-bottom: 28px;
  font-size: 0.9375rem;
}

.newsletter__form {
  display: flex;
  gap: 10px;
  max-width: 420px;
  margin: 0 auto;
}

@media (max-width: 480px) {
  .newsletter__form {
    flex-direction: column;
  }
}

.newsletter__input {
  flex: 1;
  padding: 14px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  color: var(--color-text);
  font-size: 0.9375rem;
  font-family: var(--font-body);
  transition: border-color 0.2s;
  outline: none;
}

.newsletter__input:focus {
  border-color: var(--color-accent);
}

.newsletter__input::placeholder {
  color: var(--color-text-tertiary);
}

.newsletter__btn {
  padding: 14px 28px;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9375rem;
  white-space: nowrap;
  transition: background 0.2s, transform 0.15s;
}

.newsletter__btn:hover {
  background: var(--color-accent-hover);
}

.newsletter__btn:active {
  transform: scale(0.97);
}

/* ---------- Footer ---------- */
/* ---------- Footer — Dark Modern ---------- */
.footer {
  background: #101110;
  padding: 64px 0 0;
  color: rgba(255,255,255,0.6);
  font-size: 0.875rem;
}

.footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer__brand-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer__logo {
  height: 48px;
  width: auto;
  object-fit: contain;
  align-self: flex-start;
}

.footer__tagline {
  color: rgba(255,255,255,0.45);
  font-size: 0.875rem;
  line-height: 1.6;
  max-width: 280px;
}

.footer__nav-col {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer__heading {
  color: #fff;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__list a {
  color: rgba(255,255,255,0.5);
  transition: color 0.2s;
  font-size: 0.875rem;
}

.footer__list a:hover {
  color: #fff;
}

.footer__bottom {
  padding: 24px 0;
  text-align: center;
  color: rgba(255,255,255,0.3);
  font-size: 0.75rem;
}

/* Footer responsive */
@media (max-width: 768px) {
  .footer__top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer__brand-col {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .footer__top {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

/* Sitemap page list styles */
.sitemap-list {
  list-style: none;
  padding-left: 0;
  columns: 2;
  column-gap: 32px;
  margin-bottom: 40px;
}

.sitemap-list li {
  margin-bottom: 10px;
  break-inside: avoid;
}

.sitemap-list a {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 0.2s;
  border-bottom: 1px solid transparent;
}

.sitemap-list a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

@media (max-width: 640px) {
  .sitemap-list {
    columns: 1;
  }
}

/* =============================================
   ARTICLE PAGE
   ============================================= */

/* ---------- Article Header ---------- */
.article-header {
  padding: 48px 0 0;
  text-align: center;
}

@media (min-width: 641px) {
  .article-header { padding: 72px 0 0; }
}

.article-header__category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 20px;
  padding: 6px 14px;
  background: var(--color-accent-light);
  border-radius: 100px;
}

.article-header__title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.1;
  margin-bottom: 20px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.article-header__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
}

.article-header__separator {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-text-tertiary);
}

/* ---------- Featured Image ---------- */
.article-featured-image {
  max-width: 960px;
  margin: 0 auto 48px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 2 / 1;
  background: var(--color-surface);
}

.article-featured-image--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 3rem;
  color: rgba(255,255,255,0.4);
  position: relative;
  overflow: hidden;
}

.article-featured-image--placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 80%, rgba(255,255,255,0.1) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 20%, rgba(255,255,255,0.06) 0%, transparent 50%);
  pointer-events: none;
}

/* ---------- Table of Contents ---------- */
.toc {
  max-width: var(--content-width);
  margin: 0 auto 48px;
  padding: 24px 28px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
}

.toc__title {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.toc__list {
  list-style: none;
  counter-reset: toc;
}

.toc__list li {
  counter-increment: toc;
  margin-bottom: 6px;
}

.toc__list li a {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  transition: color 0.2s;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.toc__list li a::before {
  content: counter(toc, decimal-leading-zero);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-tertiary);
  font-variant-numeric: tabular-nums;
}

.toc__list li a:hover {
  color: var(--color-accent);
}

.toc__list li.toc--h3 {
  padding-left: 28px;
}

/* ---------- Article Content ---------- */
.article-content {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.article-content h2 {
  font-size: 1.75rem;
  margin: 48px 0 16px;
}

.article-content h3 {
  font-size: 1.3rem;
  margin: 36px 0 12px;
}

.article-content p {
  font-size: 1.0625rem;
  line-height: 1.75;
  margin-bottom: 24px;
  color: var(--color-text);
}

.article-content ul,
.article-content ol {
  font-size: 1.0625rem;
  line-height: 1.75;
  margin-bottom: 24px;
  padding-left: 24px;
  color: var(--color-text);
}

.article-content li {
  margin-bottom: 8px;
}

.article-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding: 4px 0 4px 24px;
  margin: 32px 0;
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  font-style: italic;
}

.article-content strong {
  font-weight: 600;
}

.article-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: text-decoration-color 0.2s;
}

.article-content a:hover {
  text-decoration-color: transparent;
}

/* ---------- Tables ---------- */
.article-content table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 32px 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.04);
}

.article-content thead {
  background: var(--color-text);
  color: #fff;
}

.article-content thead th {
  padding: 14px 18px;
  text-align: left;
  font-weight: 600;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.article-content thead th:first-child {
  border-radius: var(--radius-md) 0 0 0;
}

.article-content thead th:last-child {
  border-radius: 0 var(--radius-md) 0 0;
}

.article-content tbody tr {
  background: var(--color-bg-card);
  transition: background 0.15s;
}

.article-content tbody tr:nth-child(even) {
  background: var(--color-bg-alt);
}

.article-content tbody tr:hover {
  background: var(--color-accent-light);
}

.article-content tbody td {
  padding: 13px 18px;
  border-bottom: 1px solid var(--color-border-light);
  vertical-align: top;
}

.article-content tbody tr:last-child td {
  border-bottom: none;
}

.article-content tbody td:first-child {
  font-weight: 500;
  color: var(--color-text);
}

/* Responsive table scroll */
.article-content .table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 32px -20px;
  padding: 0 20px;
}

.article-content .table-wrap table {
  margin: 0;
  min-width: 500px;
}

/* Mobile table adjustments */
@media (max-width: 640px) {
  .article-content table {
    font-size: 0.8125rem;
  }

  .article-content thead th,
  .article-content tbody td {
    padding: 10px 12px;
  }

  .article-content thead th {
    font-size: 0.6875rem;
  }
}

/* ---------- Callout / Key Takeaway Boxes ---------- */
.callout {
  background: var(--color-accent-light);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 32px 0;
  border-left: 4px solid var(--color-accent);
  position: relative;
}

.callout::before {
  content: 'Key Takeaway';
  display: block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.callout p {
  margin-bottom: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
}

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

/* ---------- Numbered Steps / How-To ---------- */
.article-content ol.steps {
  counter-reset: step;
  list-style: none;
  padding-left: 0;
}

.article-content ol.steps li {
  counter-increment: step;
  position: relative;
  padding-left: 48px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border-light);
}

.article-content ol.steps li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.article-content ol.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 32px;
  height: 32px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
}

/* ---------- TL;DR Summary Block ---------- */
.tldr {
  background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-bg-alt) 100%);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 0 0 40px;
  border-left: 4px solid var(--color-accent);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--color-text);
  position: relative;
}

.tldr strong {
  color: var(--color-accent);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: block;
  margin-bottom: 6px;
}

@media (max-width: 640px) {
  .tldr {
    padding: 16px 18px;
    font-size: 0.875rem;
  }
}

/* ---------- Medical Disclaimer ---------- */
.disclaimer {
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 48px 0 0;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  border: 1px solid var(--color-border-light);
}

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

/* ---------- Article section dividers ---------- */
.article-content h2 {
  padding-top: 40px;
  border-top: 1px solid var(--color-border-light);
}

.article-content h2:first-of-type {
  border-top: none;
  padding-top: 0;
}

/* ---------- FAQ Section — Accordion Style ---------- */
.article-content h3[id^="faq-"] {
  background: var(--color-bg-card);
  margin: 0 0 2px;
  padding: 20px 56px 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  position: relative;
  transition: all 0.25s var(--ease-out);
  user-select: none;
}

/* Plus/minus toggle icon */
.article-content h3[id^="faq-"]::after {
  content: '+';
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  background: var(--color-surface);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-text-secondary);
  transition: all 0.3s var(--ease-out);
}

/* Q badge */
.article-content h3[id^="faq-"]::before {
  content: 'Q';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  margin-right: 14px;
  flex-shrink: 0;
  vertical-align: middle;
  transition: transform 0.3s var(--ease-spring);
}

.article-content h3[id^="faq-"]:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
  transform: translateX(4px);
}

.article-content h3[id^="faq-"]:hover::after {
  background: var(--color-accent);
  color: #fff;
}

.article-content h3[id^="faq-"]:hover::before {
  transform: scale(1.1);
}

/* Open state */
.article-content h3[id^="faq-"].faq-open {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  margin-bottom: 0;
}

.article-content h3[id^="faq-"].faq-open::after {
  content: '−';
  background: var(--color-accent);
  color: #fff;
  transform: translateY(-50%) rotate(0deg);
}

/* FAQ answer */
.article-content h3[id^="faq-"] + p {
  background: var(--color-bg-card);
  margin: 0 0 8px;
  padding: 0 24px 0;
  max-height: 0;
  overflow: hidden;
  border-left: 1px solid var(--color-accent);
  border-right: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--color-text-secondary);
  opacity: 0;
  transition: max-height 0.4s var(--ease-out), padding 0.4s var(--ease-out), opacity 0.3s;
}

/* Open answer */
.article-content h3[id^="faq-"].faq-open + p {
  max-height: 500px;
  padding: 20px 24px 24px;
  opacity: 1;
}

@media (max-width: 640px) {
  .article-content h3[id^="faq-"] {
    padding: 16px 48px 16px 16px;
    font-size: 0.95rem;
  }

  .article-content h3[id^="faq-"]::after {
    right: 14px;
    width: 26px;
    height: 26px;
    font-size: 1.1rem;
  }

  .article-content h3[id^="faq-"]::before {
    width: 24px;
    height: 24px;
    font-size: 0.6875rem;
    margin-right: 10px;
  }

  .article-content h3[id^="faq-"].faq-open + p {
    padding: 16px 16px 20px;
    font-size: 0.875rem;
  }
}

/* ---------- Share Bar ---------- */
.share-bar {
  max-width: var(--content-width);
  margin: 48px auto 0;
  padding: 24px 0;
  border-top: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  gap: 16px;
}

.share-bar__label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.share-bar__btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, border-color 0.2s;
}

.share-bar__btn:hover {
  background: var(--color-surface);
  border-color: var(--color-text-tertiary);
}

.share-bar__btn svg {
  width: 16px;
  height: 16px;
  fill: var(--color-text-secondary);
}

/* ---------- Related Posts ---------- */
.related {
  padding: 64px 0 80px;
  margin-top: 64px;
  border-top: 1px solid var(--color-border-light);
}

.related__title {
  font-size: 1.5rem;
  margin-bottom: 32px;
  text-align: center;
}

.related__grid {
  display: grid;
  gap: 24px;
}

@media (min-width: 641px) {
  .related__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 960px) {
  .related__grid { grid-template-columns: repeat(3, 1fr); }
}

/* =============================================
   ABOUT PAGE
   ============================================= */
.about-hero {
  padding: 80px 0 48px;
  text-align: center;
}

@media (min-width: 641px) {
  .about-hero { padding: 120px 0 64px; }
}

.about-hero__title {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  margin-bottom: 20px;
}

.about-hero__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.65;
}

.about-content {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--gutter) 80px;
}

.about-content h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  margin: 48px 0 16px;
}

.about-content p {
  font-size: 1.0625rem;
  line-height: 1.75;
  margin-bottom: 24px;
  color: var(--color-text);
}

.about-values {
  display: grid;
  gap: 24px;
  margin: 48px 0;
}

@media (min-width: 641px) {
  .about-values { grid-template-columns: repeat(3, 1fr); }
}

.about-value {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 28px;
}

.about-value__number {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 12px;
  letter-spacing: 0.06em;
}

.about-value__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.about-value__text {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* =============================================
   SCROLL REVEAL ANIMATION
   ============================================= */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.reveal-stagger > .reveal:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger > .reveal:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger > .reveal:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger > .reveal:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger > .reveal:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger > .reveal:nth-child(6) { transition-delay: 400ms; }

/* =============================================
   MISC
   ============================================= */

/* Back-to-top button */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-text);
  color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.3s, transform 0.3s;
  z-index: 90;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  opacity: 0.85;
}

.back-to-top svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 2.5;
  fill: none;
}

/* Empty state when filter has no results */
.posts-empty {
  text-align: center;
  padding: 64px 0;
  color: var(--color-text-tertiary);
  font-size: 1rem;
  grid-column: 1 / -1;
}

/* =============================================
   PRINT
   ============================================= */
@media print {
  .nav, .footer, .newsletter, .share-bar, .back-to-top, .toc { display: none; }
  body { background: #fff; color: #000; }
  .article-content p { font-size: 12pt; }
}