/* ============================================================
   BLOG.CSS — PrecisionEyeSurgery.ca
   Covers: Blog index (magazine grid), article pages, sidebar,
   callout elements, pull quotes, CTAs
   ============================================================ */

/* ── Blog Page Shell ── */
.blog-page-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #1a4f8a 100%);
  color: var(--color-text-inverse);
  padding: var(--space-16) 0 var(--space-12);
  position: relative;
  overflow: hidden;
}
.blog-page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}
.blog-page-hero .container { position: relative; }
.blog-page-hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: #fff;
}
.blog-page-hero p {
  font-size: var(--text-base);
  opacity: 0.85;
  max-width: 640px;
  line-height: 1.7;
}

/* ── Category Filter Bar ── */
.category-filter {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) 0;
  position: sticky;
  top: 73px;
  z-index: 40;
}
.category-filter .container {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  align-items: center;
}
.category-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all var(--transition-interactive);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  white-space: nowrap;
}
.category-btn:hover,
.category-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.category-btn[data-category="Cataract Surgery"].active { background: #1a5fa8; border-color: #1a5fa8; }
.category-btn[data-category="Glaucoma"].active        { background: #2a7a4a; border-color: #2a7a4a; }
.category-btn[data-category="Blepharoplasty"].active  { background: #7c3d8a; border-color: #7c3d8a; }
.category-btn[data-category="Diabetic Eye Care"].active { background: #b35e1a; border-color: #b35e1a; }
.category-btn[data-category="General Eye Health"].active { background: #0d3b6e; border-color: #0d3b6e; }

/* ── Blog Index Main ── */
.blog-index-main {
  padding: var(--space-12) 0 var(--space-20);
  background: var(--color-bg);
}

/* ── Article Cards ── */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

/* Featured card: full width */
.blog-card-featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  text-decoration: none;
  color: inherit;
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
  border: 1px solid var(--color-border);
}
.blog-card-featured:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.blog-card-featured .card-image {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0d3b6e 0%, #1a5fa8 50%, #c8912a 100%);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.blog-card-featured .card-image-inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.blog-card-featured .card-image svg {
  width: 120px;
  height: 120px;
  opacity: 0.25;
}
.blog-card-featured .card-image-badge {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  background: var(--color-accent);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: var(--radius-full);
}
.blog-card-featured .card-body {
  padding: var(--space-10) var(--space-10);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-4);
}
.blog-card-featured .card-body .category-tag {
  align-self: flex-start;
}
.blog-card-featured .card-title {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 1rem + 1vw, 1.85rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.25;
}
.blog-card-featured .card-excerpt {
  color: var(--color-text-muted);
  line-height: 1.7;
  font-size: var(--text-sm);
}
.blog-card-featured .card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.blog-card-featured .card-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-accent);
  font-weight: 600;
  font-size: var(--text-sm);
  margin-top: var(--space-2);
  text-decoration: none;
}
.blog-card-featured .card-cta svg { transition: transform var(--transition-interactive); }
.blog-card-featured:hover .card-cta svg { transform: translateX(4px); }

/* Regular article cards */
.blog-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: inherit;
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
  display: flex;
  flex-direction: column;
}
.blog-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.blog-card .card-image {
  position: relative;
  height: 200px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1a5fa8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.blog-card .card-image svg {
  width: 72px;
  height: 72px;
  opacity: 0.2;
  color: #fff;
}
.blog-card .card-body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}
.blog-card .card-title {
  font-family: var(--font-display);
  font-size: clamp(1rem, 0.9rem + 0.4vw, 1.2rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}
.blog-card .card-excerpt {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.65;
  flex: 1;
}
.blog-card .card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

/* Category tag pill */
.category-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--color-primary-highlight);
  color: var(--color-primary);
}
.category-tag[data-cat="Cataract Surgery"]  { background: #dce8f8; color: #1a4f8a; }
.category-tag[data-cat="Glaucoma"]          { background: #d4eedd; color: #1a5a38; }
.category-tag[data-cat="Blepharoplasty"]    { background: #ede0f8; color: #6a2a7a; }
.category-tag[data-cat="Diabetic Eye Care"] { background: #fdebd5; color: #8a4010; }
.category-tag[data-cat="General Eye Health"]{ background: #dce8f8; color: #0d3b6e; }

/* Card colour theming via color */
.blog-card[data-cat="Cataract Surgery"]  .card-image { background: linear-gradient(135deg, #1a4f8a, #2a72c0); }
.blog-card[data-cat="Glaucoma"]          .card-image { background: linear-gradient(135deg, #1a5a38, #2a8a54); }
.blog-card[data-cat="Blepharoplasty"]    .card-image { background: linear-gradient(135deg, #6a2a7a, #9a4aaa); }
.blog-card[data-cat="Diabetic Eye Care"] .card-image { background: linear-gradient(135deg, #8a4010, #c05a1a); }
.blog-card[data-cat="General Eye Health"].card-image { background: linear-gradient(135deg, #0d3b6e, #1a5fa8); }

/* ── Article Page Layout ── */
.article-hero {
  background: linear-gradient(160deg, var(--color-primary) 0%, #1a4f8a 60%, #0d3b6e 100%);
  color: var(--color-text-inverse);
  padding: var(--space-16) 0 var(--space-12);
  position: relative;
  overflow: hidden;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M0 0h40v40H0V0zm40 40h40v40H40V40zm0-40h2l-2 2V0zm0 4l4-4h2l-6 6V4zm0 4l8-8h2L40 10V8zm0 4L52 0h2L40 14v-2zm0 4L56 0h2L40 18v-2zm0 4L60 0h2L40 22v-2zm0 4L64 0h2L40 26v-2zm0 4L68 0h2L40 30v-2zm0 4L72 0h2L40 34v-2zm0 4L76 0h2L40 38v-2zm0 4L80 0v2L42 40h-2zm4 0L80 4v2L46 40h-2zm4 0L80 8v2L50 40h-2zm4 0L80 12v2L54 40h-2zm4 0L80 16v2L58 40h-2zm4 0L80 20v2L62 40h-2zm4 0L80 24v2L66 40h-2zm4 0L80 28v2L70 40h-2zm4 0L80 32v2L74 40h-2zm4 0L80 36v2L78 40h-2zm4 0L80 40v-2h-2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
  opacity: 0.4;
}
.article-hero .container { position: relative; }
.article-hero-inner {
  max-width: 800px;
}
.article-hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  opacity: 0.75;
  margin-bottom: var(--space-4);
}
.article-hero-breadcrumb a {
  color: inherit;
  text-decoration: none;
  opacity: 0.8;
}
.article-hero-breadcrumb a:hover { opacity: 1; }
.article-hero-breadcrumb span { opacity: 0.5; }
.article-hero-badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--color-accent);
  color: #fff;
  margin-bottom: var(--space-4);
}
.article-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 1.2rem + 1.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-5);
  color: #fff;
}
.article-hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  font-size: var(--text-sm);
  opacity: 0.85;
  flex-wrap: wrap;
}
.article-hero-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ── Article Body + Sidebar Layout ── */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-12);
  align-items: start;
  padding: var(--space-12) 0 var(--space-20);
}

/* Article prose */
.article-body {
  max-width: 68ch;
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-text);
}
.article-body h2 {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 1rem + 0.75vw, 1.65rem);
  font-weight: 700;
  color: var(--color-primary);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
  line-height: 1.25;
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-accent-highlight);
}
.article-body h3 {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 0.95rem + 0.4vw, 1.25rem);
  font-weight: 700;
  color: var(--color-text);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}
.article-body p {
  margin-bottom: var(--space-5);
}
.article-body ul,
.article-body ol {
  margin-bottom: var(--space-5);
  padding-left: var(--space-6);
}
.article-body li {
  margin-bottom: var(--space-2);
  line-height: 1.7;
}
.article-body a {
  color: var(--color-accent);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-body a:hover { color: var(--color-accent-hover); }
.article-body strong { color: var(--color-text); font-weight: 700; }

/* Pull quote */
.pull-quote {
  margin: var(--space-8) 0;
  padding: var(--space-6) var(--space-8);
  border-left: 4px solid var(--color-accent);
  background: var(--color-accent-highlight);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}
.pull-quote p {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.35rem);
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.5;
  margin-bottom: 0;
  font-style: italic;
}

/* Callout box */
.callout-box {
  margin: var(--space-8) 0;
  padding: var(--space-6) var(--space-7);
  background: #dce8f8;
  border: 1px solid #b0c8e8;
  border-radius: var(--radius-lg);
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}
[data-theme="dark"] .callout-box {
  background: var(--color-primary-highlight);
  border-color: var(--color-border);
}
.callout-box-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}
.callout-box-content p {
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.65;
}
.callout-box-content p:last-child { margin-bottom: 0; }
.callout-box-content strong {
  color: var(--color-primary);
  display: block;
  margin-bottom: var(--space-1);
}

/* Callout box variants */
.callout-box.callout-warning {
  background: var(--color-warning-highlight);
  border-color: #e0a870;
}
.callout-box.callout-warning .callout-box-icon { background: var(--color-warning); }
.callout-box.callout-success {
  background: var(--color-success-highlight);
  border-color: #80c8a0;
}
.callout-box.callout-success .callout-box-icon { background: var(--color-success); }

/* FAQ section in article */
.article-faq {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 2px solid var(--color-border);
}
.article-faq h2 {
  border-bottom: none;
  margin-top: 0;
}
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-3);
}
.faq-item summary {
  padding: var(--space-5) var(--space-6);
  font-weight: 600;
  font-size: var(--text-sm);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  color: var(--color-text);
  background: var(--color-surface);
  transition: background var(--transition-interactive);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '';
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%234a5a72' stroke-width='2.5'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E") center/contain no-repeat;
  transition: transform var(--transition-interactive);
}
.faq-item[open] summary { background: var(--color-surface-2); }
.faq-item[open] summary::after { transform: rotate(180deg); }
.faq-item summary:hover { background: var(--color-surface-2); }
.faq-item-body {
  padding: var(--space-4) var(--space-6) var(--space-6);
  background: var(--color-surface);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
}

/* End-of-article CTA box */
.article-cta-box {
  margin-top: var(--space-12);
  padding: var(--space-8) var(--space-8);
  background: linear-gradient(135deg, var(--color-primary) 0%, #1a5fa8 100%);
  border-radius: var(--radius-xl);
  color: #fff;
  text-align: center;
}
.article-cta-box h3 {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 1rem + 0.5vw, 1.4rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-3);
}
.article-cta-box p {
  opacity: 0.88;
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
  line-height: 1.65;
}
.article-cta-box .cta-btns {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}
.article-cta-box .btn-cta-light {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: #fff;
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: var(--text-sm);
  text-decoration: none;
  transition: all var(--transition-interactive);
  border: 2px solid transparent;
}
.article-cta-box .btn-cta-light:hover {
  background: var(--color-accent);
  color: #fff;
}
.article-cta-box .btn-cta-outline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: transparent;
  color: #fff;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: var(--text-sm);
  text-decoration: none;
  transition: all var(--transition-interactive);
  border: 2px solid rgba(255,255,255,0.5);
}
.article-cta-box .btn-cta-outline:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.1);
}

/* ── Sticky Sidebar ── */
.article-sidebar {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* TOC widget */
.sidebar-toc {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.sidebar-toc-header {
  background: var(--color-surface-2);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.toc-list {
  padding: var(--space-4) var(--space-5);
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.toc-list a {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-1) var(--space-3);
  border-left: 2px solid transparent;
  transition: all var(--transition-interactive);
  line-height: 1.45;
}
.toc-list a:hover,
.toc-list a.toc-active {
  color: var(--color-primary);
  border-left-color: var(--color-accent);
  background: var(--color-accent-highlight);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* Sidebar related articles */
.sidebar-related {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.sidebar-related-header {
  background: var(--color-surface-2);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.sidebar-related-list {
  padding: var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.sidebar-related-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  text-decoration: none;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  transition: background var(--transition-interactive);
}
.sidebar-related-item:hover { background: var(--color-surface-2); }
.sidebar-related-item .rel-cat {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.sidebar-related-item .rel-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.35;
}
.sidebar-related-item .rel-meta {
  font-size: 0.7rem;
  color: var(--color-text-faint);
}

/* Sidebar CTA widget */
.sidebar-cta {
  background: linear-gradient(160deg, var(--color-primary) 0%, #1a5fa8 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  color: #fff;
  text-align: center;
}
.sidebar-cta h4 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: #fff;
}
.sidebar-cta p {
  font-size: var(--text-xs);
  opacity: 0.85;
  line-height: 1.65;
  margin-bottom: var(--space-5);
}
.sidebar-cta a {
  display: block;
  padding: var(--space-3) var(--space-4);
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: var(--text-sm);
  text-decoration: none;
  transition: background var(--transition-interactive);
}
.sidebar-cta a:hover { background: var(--color-accent-hover); }

/* ── Responsive ── */
@media (max-width: 960px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
    order: -1;
  }
  .sidebar-toc { display: none; }
  .blog-card-featured {
    grid-template-columns: 1fr;
  }
  .blog-card-featured .card-image {
    min-height: 220px;
  }
}

@media (max-width: 720px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .blog-card-featured {
    grid-column: 1 / -1;
  }
  .article-body {
    max-width: 100%;
  }
  .article-cta-box {
    padding: var(--space-6);
  }
  .pull-quote {
    padding: var(--space-4) var(--space-5);
  }
}