/* =====================================================
   CompoundCalc — Blog System Stylesheet
   Extends main style.css — do not import without it
   ===================================================== */

/* ─── BLOG SHARED NAV OVERRIDE ───────────────────────── */
.site-nav a.active {
  color: var(--primary);
  font-weight: 700;
}

/* ─── PAGE HERO BANNER ───────────────────────────────── */
.page-hero {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent-light) 100%);
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--border);
}

.dark-mode .page-hero {
  background: linear-gradient(135deg, rgba(99,102,241,0.13) 0%, rgba(16,185,129,0.08) 100%);
}

.page-hero h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  margin-bottom: 12px;
}

.page-hero p {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 580px;
}

/* ─── BREADCRUMB ─────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.82rem;
  color: var(--text-subtle);
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.breadcrumb a { color: var(--text-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb i { font-size: 0.65rem; color: var(--text-subtle); }

/* ─── BLOG INDEX LAYOUT ──────────────────────────────── */
.blog-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  padding: 48px 0 80px;
  align-items: start;
}

/* ─── SEARCH & FILTER BAR ────────────────────────────── */
.blog-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.blog-search-wrap {
  position: relative;
  flex: 1;
  min-width: 200px;
}

.blog-search-wrap i {
  position: absolute;
  left: 13px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-subtle);
  font-size: 0.9rem;
}

.blog-search {
  width: 100%;
  padding: 10px 14px 10px 38px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text);
  transition: border-color var(--transition);
  outline: none;
}

.blog-search:focus { border-color: var(--primary); }

.category-filter {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.cat-btn {
  padding: 7px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.cat-btn:hover,
.cat-btn.active {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}

/* ─── FEATURED ARTICLE ───────────────────────────────── */
.featured-article {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  margin-bottom: 36px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  transition: transform var(--transition), box-shadow var(--transition);
}

.featured-article:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.12);
}

.featured-img {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  position: relative;
  overflow: hidden;
}

.featured-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 60%);
}

.featured-body {
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.featured-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.featured-body h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.featured-body p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 18px;
}

.featured-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.78rem;
  color: var(--text-subtle);
  margin-bottom: 18px;
}

.featured-meta span { display: flex; align-items: center; gap: 5px; }
.featured-meta i { color: var(--primary); }

/* ─── ARTICLE GRID ───────────────────────────────────── */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.article-card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.article-card-img {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
  position: relative;
  overflow: hidden;
}

.dark-mode .article-card-img {
  background: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(16,185,129,0.1));
}

.article-card-img .article-num {
  position: absolute;
  bottom: 8px;
  right: 10px;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-subtle);
  background: var(--surface);
  padding: 2px 7px;
  border-radius: 100px;
}

.article-card-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-tag {
  display: inline-block;
  background: var(--surface2);
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
  border: 1px solid var(--border);
}

.article-card h3 {
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.article-card p {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 14px;
}

.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-subtle);
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.article-card-meta span { display: flex; align-items: center; gap: 5px; }

.read-more-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 12px;
  transition: gap var(--transition);
}

.read-more-link:hover { gap: 8px; text-decoration: none; }

/* ─── PAGINATION ─────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.page-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.page-btn:hover,
.page-btn.active {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

/* ─── BLOG SIDEBAR ───────────────────────────────────── */
.blog-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.widget-title {
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.widget-title i { color: var(--primary); }

/* Calculator CTA Widget */
.calc-widget {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  border: none;
}

.calc-widget .widget-title { color: #fff; }
.calc-widget .widget-title i { color: rgba(255,255,255,0.8); }
.calc-widget p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 16px;
  line-height: 1.6;
}

.btn-widget {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 18px;
  background: #fff;
  color: var(--primary-dark);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  transition: all var(--transition);
  width: 100%;
  justify-content: center;
}

.btn-widget:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.15);
  text-decoration: none;
  color: var(--primary-dark);
}

/* Popular Posts Widget */
.popular-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.popular-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  text-decoration: none;
  transition: all var(--transition);
}

.popular-item:hover { transform: translateX(3px); }

.popular-num {
  width: 26px;
  height: 26px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  flex-shrink: 0;
}

.popular-text {
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  transition: color var(--transition);
}

.popular-item:hover .popular-text { color: var(--primary); }

/* Tags Widget */
.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.tag-chip {
  padding: 4px 11px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: all var(--transition);
}

.tag-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
  text-decoration: none;
}

/* Email Capture Widget */
.email-widget-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.email-widget-form input {
  font-size: 0.88rem;
  padding: 10px 13px;
}

.btn-email-widget {
  width: 100%;
  padding: 11px;
  background: linear-gradient(135deg, var(--accent), #059669);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  transition: all var(--transition);
}

.btn-email-widget:hover { transform: translateY(-2px); box-shadow: 0 4px 14px rgba(16,185,129,0.35); }

/* ─── ARTICLE PAGE LAYOUT ────────────────────────────── */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  padding: 48px 0 80px;
  align-items: start;
}

/* ─── ARTICLE HEADER ─────────────────────────────────── */
.article-header {
  margin-bottom: 32px;
}

.article-tags-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.article-cat-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 11px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.article-header h1 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 14px;
  letter-spacing: -0.03em;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.article-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.author-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}

.author-info .author-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text);
}

.author-info .author-role {
  font-size: 0.75rem;
  color: var(--text-subtle);
}

.meta-stats {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.meta-stat {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.8rem;
  color: var(--text-subtle);
}

.meta-stat i { color: var(--primary); font-size: 0.75rem; }

/* ─── FEATURED IMAGE BANNER ──────────────────────────── */
.article-featured-img {
  width: 100%;
  height: 340px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 7rem;
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent-light) 100%);
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
}

.dark-mode .article-featured-img {
  background: linear-gradient(135deg, rgba(99,102,241,0.15) 0%, rgba(16,185,129,0.1) 100%);
}

.article-featured-img .img-overlay-text {
  position: absolute;
  bottom: 20px;
  left: 24px;
  background: rgba(0,0,0,0.55);
  color: #fff;
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 0.78rem;
  backdrop-filter: blur(4px);
}

/* ─── TABLE OF CONTENTS ──────────────────────────────── */
.toc-box {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 20px 24px;
  margin: 0 0 32px;
}

.toc-title {
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-title i { color: var(--primary); }

.toc-list {
  list-style: none;
  counter-reset: toc-counter;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.toc-list li {
  counter-increment: toc-counter;
}

.toc-list a {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  display: flex;
  align-items: flex-start;
  gap: 9px;
  transition: color var(--transition);
  line-height: 1.4;
}

.toc-list a::before {
  content: counter(toc-counter, decimal-leading-zero);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  padding: 1px 6px;
  border-radius: 4px;
  flex-shrink: 0;
  margin-top: 1px;
}

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

/* ─── ARTICLE BODY STYLES ────────────────────────────── */
.article-body {
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.article-body h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text);
  margin: 40px 0 14px;
  letter-spacing: -0.02em;
  line-height: 1.3;
  scroll-margin-top: 80px;
}

.article-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin: 28px 0 10px;
  scroll-margin-top: 80px;
}

.article-body p {
  margin-bottom: 18px;
}

.article-body strong { color: var(--text); font-weight: 700; }
.article-body em { font-style: italic; }

.article-body ul,
.article-body ol {
  padding-left: 22px;
  margin-bottom: 18px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.article-body li { line-height: 1.7; }

.article-body a {
  color: var(--primary);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

/* Blockquote */
.article-body blockquote {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 18px 22px;
  margin: 24px 0;
  font-style: italic;
  color: var(--text);
  font-size: 1.05rem;
}

.dark-mode .article-body blockquote {
  background: rgba(99,102,241,0.1);
}

/* Key Takeaway Box */
.key-box {
  background: var(--accent-light);
  border: 1px solid rgba(16,185,129,0.3);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin: 24px 0;
}

.dark-mode .key-box {
  background: rgba(16,185,129,0.08);
  border-color: rgba(16,185,129,0.2);
}

.key-box-title {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 7px;
}

.key-box p { margin: 0; font-size: 0.95rem; }

/* Formula Display */
.formula-display {
  background: var(--surface2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin: 20px 0;
  font-family: 'Courier New', monospace;
}

.formula-display code {
  font-size: 1rem;
  color: var(--primary);
  font-weight: 700;
  display: block;
  margin-bottom: 10px;
}

.formula-display ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.formula-display li {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: inherit;
  padding: 3px 0;
}

/* Example Table */
.example-table-wrap {
  overflow-x: auto;
  margin: 20px 0;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}

.example-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.example-table th {
  background: var(--primary);
  color: #fff;
  padding: 11px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.example-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--surface);
}

.example-table tbody tr:hover td { background: var(--surface2); }
.example-table .highlight { color: var(--accent); font-weight: 700; }

/* CTA Inside Article */
.article-cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius);
  padding: 32px;
  margin: 36px 0;
  text-align: center;
  color: #fff;
}

.article-cta h3 { color: #fff; font-size: 1.2rem; margin-bottom: 8px; }
.article-cta p { color: rgba(255,255,255,0.85); font-size: 0.92rem; margin-bottom: 18px; }

.btn-article-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: #fff;
  color: var(--primary-dark);
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all var(--transition);
}

.btn-article-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.15);
  text-decoration: none;
  color: var(--primary-dark);
}

/* ─── FAQ INSIDE ARTICLE ─────────────────────────────── */
.article-faq {
  margin: 40px 0;
}

.article-faq h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 18px;
}

/* ─── ARTICLE SHARE BAR ──────────────────────────────── */
.article-share {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
  margin: 32px 0;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.share-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
}

.share-btns { display: flex; gap: 8px; flex-wrap: wrap; }

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  color: #fff;
  transition: all var(--transition);
}

.share-btn:hover { transform: translateY(-2px); color: #fff; text-decoration: none; }
.share-btn.tw { background: #1da1f2; }
.share-btn.fb { background: #1877f2; }
.share-btn.li { background: #0a66c2; }

/* ─── RELATED ARTICLES ───────────────────────────────── */
.related-articles {
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--border);
}

.related-articles h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--text);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.related-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px;
  text-decoration: none;
  transition: all var(--transition);
  display: block;
}

.related-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
}

.related-emoji { font-size: 1.8rem; margin-bottom: 10px; }
.related-card h4 {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 5px;
}

.related-card p { font-size: 0.78rem; color: var(--text-muted); margin: 0; }

/* ─── ARTICLE STICKY SIDEBAR ─────────────────────────── */
.article-sidebar {
  position: sticky;
  top: 80px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

/* TOC Sidebar Widget */
.toc-sidebar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.toc-sidebar-title {
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 7px;
}

.toc-sidebar-title i { color: var(--primary); }

.toc-sidebar-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.toc-sidebar-list a {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 5px 10px;
  border-radius: 5px;
  display: block;
  border-left: 2px solid transparent;
  transition: all var(--transition);
  line-height: 1.4;
}

.toc-sidebar-list a:hover,
.toc-sidebar-list a.active {
  color: var(--primary);
  background: var(--primary-light);
  border-left-color: var(--primary);
}

/* ─── PROGRESS BAR ───────────────────────────────────── */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: 200;
  width: 0%;
  transition: width 0.1s linear;
}

/* ─── LEGAL PAGES ────────────────────────────────────── */
.legal-layout {
  max-width: 820px;
  margin: 0 auto;
  padding: 56px 0 80px;
}

.legal-body h2 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text);
  margin: 36px 0 12px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.legal-body h2:first-child { border-top: none; margin-top: 0; }

.legal-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin: 22px 0 8px;
}

.legal-body p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 14px;
}

.legal-body ul {
  padding-left: 20px;
  margin-bottom: 14px;
}

.legal-body li {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 5px;
}

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

.legal-last-updated {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 5px 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

/* ─── CONTACT PAGE ───────────────────────────────────── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding: 56px 0 80px;
  align-items: start;
}

.contact-form-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow-lg);
}

.contact-form-card h2 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 24px;
  color: var(--text);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 7px;
}

.form-group textarea {
  width: 100%;
  background: var(--surface2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text);
  outline: none;
  resize: vertical;
  min-height: 130px;
  transition: border-color var(--transition);
}

.form-group textarea:focus { border-color: var(--primary); }

.btn-contact-submit {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition);
  box-shadow: 0 4px 14px rgba(99,102,241,0.35);
}

.btn-contact-submit:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(99,102,241,0.45); }

.contact-info-panel { display: flex; flex-direction: column; gap: 20px; }

.contact-info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-icon {
  width: 46px;
  height: 46px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-info-text h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.contact-info-text p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

/* ─── RESPONSIVE BLOG ────────────────────────────────── */
@media (max-width: 1024px) {
  .blog-layout,
  .article-layout {
    grid-template-columns: 1fr;
  }
  .blog-sidebar,
  .article-sidebar { display: none; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .seo-sidebar { display: none; }
  .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .featured-article { grid-template-columns: 1fr; }
  .featured-img { min-height: 180px; }
  .articles-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .article-featured-img { height: 200px; font-size: 4rem; }
  .article-share { flex-direction: column; align-items: flex-start; }
  .contact-form-card { padding: 24px 18px; }
}

@media (max-width: 480px) {
  .blog-controls { flex-direction: column; align-items: stretch; }
  .category-filter { justify-content: flex-start; }
  .article-meta-bar { flex-direction: column; align-items: flex-start; gap: 12px; }
}