/* ==========================================================================
   HindiMHelp.com - Core Stylesheet
   Theme Colors:
   Primary: #00417C (Deep Blue)
   Secondary: #FF9900 (Orange)
   Background: #F8FAFC
   Card Background: #FFFFFF
   Text: #1E293B
   Border: #E2E8F0
   ========================================================================== */

:root {
  --primary: #00417C;
  --primary-dark: #002d57;
  --primary-light: #0d5aa7;
  --secondary: #FF9900;
  --secondary-hover: #e68a00;
  --secondary-light: #fff5e6;
  --bg-main: #F8FAFC;
  --card-bg: #FFFFFF;
  --text-main: #1E293B;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  --border-color: #E2E8F0;
  --border-light: #F1F5F9;
  --success: #10B981;
  --info: #0284C7;
  --warning: #F59E0B;
  --danger: #EF4444;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --font-en: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-hi: 'Noto Sans Devanagari', -apple-system, sans-serif;
  --font-code: 'JetBrains Mono', monospace;
  --container-max: 1240px;
  --header-height: 72px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode variables support */
[data-theme="dark"] {
  --bg-main: #0F172A;
  --card-bg: #1E293B;
  --text-main: #F1F5F9;
  --text-muted: #94A3B8;
  --text-light: #64748B;
  --border-color: #334155;
  --border-light: #1E293B;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.5);
  --secondary-light: #312108;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  font-family: var(--font-hi), var(--font-en);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 1.05rem;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-family: var(--font-hi), var(--font-en);
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 1rem;
}

h1 { font-size: 2.15rem; }
h2 { font-size: 1.7rem; margin-top: 2rem; border-left: 4px solid var(--secondary); padding-left: 0.75rem; }
h3 { font-size: 1.35rem; margin-top: 1.5rem; color: var(--primary); }
h4 { font-size: 1.15rem; margin-top: 1.25rem; }

p {
  margin-bottom: 1.25rem;
}

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

a:hover {
  color: var(--secondary);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}

ul, ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

code, kbd {
  font-family: var(--font-code);
  font-size: 0.9em;
  background-color: var(--border-light);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  color: var(--primary-dark);
}

/* Header & Navigation (English Only Menus) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--card-bg);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  border-bottom: 1px solid var(--border-color);
  transition: box-shadow 0.25s ease, background-color 0.25s ease;
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--header-height);
  position: relative;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-en);
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  flex-shrink: 0;
  letter-spacing: -0.02em;
}

.site-logo .logo-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  display: block;
  border-radius: 8px;
  transition: transform 0.2s ease;
}

.site-logo:hover .logo-img {
  transform: scale(1.05);
}

.site-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-size: 1.2rem;
  font-weight: 900;
  box-shadow: 0 4px 10px rgba(0, 65, 124, 0.25);
}

.site-logo .brand-highlight {
  color: var(--secondary);
}

/* Primary Navigation (100% English) */
.main-nav {
  display: flex;
  align-items: center;
  flex: 1 1 auto;
  justify-content: flex-end;
  margin: 0 1rem;
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.2rem;
  font-family: var(--font-en);
  flex-wrap: nowrap;
}

.nav-item {
  position: relative;
  flex-shrink: 0;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.55rem 0.75rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-main);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}

.nav-link:hover, .nav-item.active > .nav-link {
  color: var(--primary);
  background-color: var(--border-light);
}

.nav-link svg {
  width: 13px;
  height: 13px;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.nav-item:hover .nav-link svg {
  transform: rotate(180deg);
}

/* English Dropdown Mega-Menu */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  min-width: 320px;
  max-width: 380px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  padding: 0.75rem 0;
  z-index: 1010;
  list-style: none;
  max-height: 480px;
  overflow-y: auto;
}

.dropdown-header {
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 700;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 0.35rem;
}

@media (min-width: 1101px) {
  .nav-item:hover .dropdown-menu,
  .nav-item:focus-within .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
}

.dropdown-item {
  margin: 0;
  padding: 0;
}

.dropdown-link {
  display: flex;
  align-items: center;
  padding: 0.55rem 1rem;
  font-size: 0.9rem;
  color: var(--text-main);
  font-family: var(--font-en);
  font-weight: 500;
  transition: var(--transition);
  border-left: 3px solid transparent;
}

.dropdown-link:hover {
  background-color: var(--border-light);
  color: var(--primary);
  border-left-color: var(--secondary);
  padding-left: 1.25rem;
}

.dropdown-link.view-all {
  border-top: 1px solid var(--border-color);
  margin-top: 0.35rem;
  font-weight: 700;
  color: var(--secondary);
}

/* 4-Column Mega-Menu for Mobile Tips (English Only) */
.nav-item.has-mega {
  position: static;
}

.header-container {
  position: relative;
}

.dropdown-menu.mega-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  min-width: unset;
  max-height: none;
  overflow: visible;
  padding: 1.5rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

.mega-column {
  display: flex;
  flex-direction: column;
}

.mega-column .dropdown-header {
  padding: 0 0 0.5rem 0;
  font-size: 0.8rem;
  color: var(--primary);
  font-weight: 800;
  border-bottom: 2px solid var(--secondary);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.mega-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.mega-list .dropdown-item {
  margin: 0;
  padding: 0;
}

.mega-list .dropdown-link {
  padding: 0.45rem 0.5rem;
  font-size: 0.88rem;
  line-height: 1.35;
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
}

.mega-list .dropdown-link:hover {
  background-color: var(--border-light);
  color: var(--primary);
  border-left-color: var(--secondary);
  padding-left: 0.75rem;
}

.mega-list .dropdown-link.view-all {
  margin-top: 0.5rem;
  padding-top: 0.6rem;
  font-weight: 700;
  color: var(--secondary);
  border-top: 1px dashed var(--border-color);
}

/* Header Utilities */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.search-toggle-btn, .theme-toggle-btn, .mobile-toggle-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  transition: var(--transition);
}

.search-toggle-btn:hover, .theme-toggle-btn:hover, .mobile-toggle-btn:hover {
  background-color: var(--border-light);
  color: var(--primary);
}

.mobile-toggle-btn {
  display: none;
}

/* Breadcrumbs (English Category / Nav, Hindi Title) */
.breadcrumb-nav {
  padding: 1rem 0;
  font-size: 0.9rem;
  font-family: var(--font-en);
  color: var(--text-muted);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
}

.breadcrumb-item a {
  color: var(--text-muted);
  text-decoration: none;
}

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

.breadcrumb-separator {
  color: var(--text-light);
  user-select: none;
}

.breadcrumb-item.active {
  color: var(--text-main);
  font-weight: 600;
  font-family: var(--font-hi), var(--font-en);
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, #002d57 0%, #00417C 60%, #0d5aa7 100%);
  color: #FFFFFF;
  padding: 4rem 0 3.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255,153,0,0.2) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-section::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 153, 0, 0.2);
  border: 1px solid var(--secondary);
  color: #FFB340;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.25rem;
  letter-spacing: 0.03em;
  font-family: var(--font-en);
}

.hero-title {
  color: #FFFFFF;
  font-size: 2.65rem;
  font-weight: 800;
  margin-bottom: 1.25rem;
  line-height: 1.3;
}

.hero-subtitle {
  color: #E2E8F0;
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-search-wrapper {
  max-width: 640px;
  margin: 0 auto;
  position: relative;
}

.search-input-group {
  position: relative;
  display: flex;
  align-items: center;
  background: #FFFFFF;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 25px rgba(0,0,0,0.2);
  padding: 0.35rem;
}

.search-input-group svg {
  margin-left: 1.25rem;
  color: var(--text-muted);
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.search-input {
  width: 100%;
  border: none;
  background: transparent;
  padding: 0.85rem 1rem;
  font-size: 1.05rem;
  color: #1E293B;
  outline: none;
  font-family: var(--font-hi), var(--font-en);
}

.search-input::placeholder {
  color: #94A3B8;
}

.search-btn {
  background: var(--secondary);
  color: #FFFFFF;
  border: none;
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-en);
  flex-shrink: 0;
}

.search-btn:hover {
  background: var(--secondary-hover);
}

/* Categories Section */
.categories-section {
  padding: 3.5rem 0 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-tag {
  display: inline-block;
  color: var(--secondary);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-en);
  margin-bottom: 0.35rem;
}

.section-title {
  font-size: 2rem;
  color: var(--text-main);
  border: none;
  padding: 0;
  margin-top: 0;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 650px;
  margin: 0.5rem auto 0;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
}

.category-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.25rem;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.cat-icon-box {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--secondary-light);
  color: var(--secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.5rem;
  transition: var(--transition);
}

.category-card:hover .cat-icon-box {
  background: var(--primary);
  color: #FFFFFF;
}

.cat-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.25rem;
  font-family: var(--font-en);
}

.cat-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Article Cards Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.75rem;
  margin-top: 1.5rem;
}

.article-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--border-color);
}

.article-card-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background-color: #E2E8F0;
}

.article-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
  transition: transform 0.4s ease;
}

.article-card:hover .article-card-thumb img {
  transform: scale(1.05);
}

.card-category-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--primary);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-en);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.article-card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  font-family: var(--font-en);
}

.card-title {
  font-size: 1.25rem;
  line-height: 1.45;
  margin-bottom: 0.75rem;
}

.card-title a {
  color: var(--text-main);
}

.card-title a:hover {
  color: var(--primary);
}

.card-excerpt {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-light);
  padding-top: 1rem;
  margin-top: auto;
}

.read-more-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--secondary);
  font-weight: 700;
  font-size: 0.95rem;
}

.read-more-link:hover {
  color: var(--secondary-hover);
  gap: 0.6rem;
}

/* Article Page Layout (70% Content, 30% Sidebar) */
.article-page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 2.5rem;
  padding: 2.5rem 0 4rem;
  align-items: start;
}

.article-main-content {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
  word-break: break-word;
  overflow-wrap: break-word;
}

.article-header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.75rem;
}

.article-title {
  font-size: 2.25rem;
  line-height: 1.35;
  margin-bottom: 1rem;
  color: var(--primary);
  word-break: break-word;
  overflow-wrap: break-word;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-family: var(--font-en);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.article-featured-image {
  margin: 1.75rem 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background-color: #002d57;
  position: relative;
  width: 100%;
  max-width: 100%;
}

.article-featured-image img {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

.article-featured-image figcaption {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  padding: 0.6rem;
  background-color: var(--border-light);
  font-family: var(--font-en);
}

/* Table of Contents */
.toc-box {
  background: var(--border-light);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 2rem 0;
}

.toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.toc-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  border: none;
  padding: 0;
}

.toc-toggle-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-en);
}

.toc-list {
  margin-top: 1rem;
  padding-left: 1.25rem;
  margin-bottom: 0;
}

.toc-list li {
  margin-bottom: 0.45rem;
  font-size: 0.95rem;
}

.toc-list a {
  color: var(--text-main);
  text-decoration: none;
}

.toc-list a:hover {
  color: var(--secondary);
  text-decoration: underline;
}

/* Callout Boxes / Tips */
.tip-box {
  background: var(--secondary-light);
  border-left: 4px solid var(--secondary);
  padding: 1.25rem 1.5rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.75rem 0;
}

.tip-box-title {
  font-weight: 700;
  color: #B45309;
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.05rem;
}

.info-box {
  background: #F0F9FF;
  border-left: 4px solid var(--info);
  padding: 1.25rem 1.5rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.75rem 0;
}

.info-box-title {
  font-weight: 700;
  color: #0369A1;
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.05rem;
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 2rem 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.data-table, .comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.data-table th, .data-table td,
.comparison-table th, .comparison-table td {
  padding: 0.85rem 1.15rem;
  border-bottom: 1px solid var(--border-color);
}

.data-table th, .comparison-table th {
  background-color: var(--primary);
  color: #FFFFFF;
  font-weight: 700;
  font-family: var(--font-en);
}

.data-table tr:last-child td,
.comparison-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:nth-child(even) td,
.comparison-table tr:nth-child(even) td {
  background-color: var(--border-light);
}

.data-table tr:hover td,
.comparison-table tr:hover td {
  background-color: #FEF3C7;
}

/* Diagrams / Visual Component Boxes */
.diagram-container {
  background: var(--border-light);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 2rem 0;
  text-align: center;
}

.diagram-title {
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1rem;
}

/* FAQ Accordion (Supports both JS accordion and native HTML5 details/summary) */
.faq-section, .faq-accordion {
  margin: 2.25rem 0;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 0.85rem;
  background: var(--card-bg);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-item:hover {
  border-color: var(--secondary);
}

.faq-item.active, details.faq-item[open] {
  box-shadow: var(--shadow-sm);
  border-color: var(--primary);
}

.faq-question, summary.faq-question {
  width: 100%;
  padding: 1.1rem 1.25rem;
  text-align: left;
  background: transparent;
  border: none;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-hi), var(--font-en);
  list-style: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

summary.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question:hover, details.faq-item[open] > summary.faq-question, .faq-item.active > .faq-question {
  background-color: var(--border-light);
  color: var(--primary);
}

.faq-question .icon {
  font-size: 1.35rem;
  line-height: 1;
  font-weight: 700;
  transition: transform 0.25s ease;
  color: var(--secondary);
  flex-shrink: 0;
}

.faq-item.active .faq-question .icon,
details.faq-item[open] > summary.faq-question .icon {
  transform: rotate(45deg);
  color: var(--primary);
}

/* Closed state: strictly hidden, 0 padding */
div.faq-item:not(.active) .faq-answer {
  display: none !important;
  max-height: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  overflow: hidden !important;
}

/* Open state: fully expanded with proper padding */
.faq-item.active .faq-answer,
details.faq-item[open] .faq-answer {
  display: block !important;
  max-height: none !important;
  overflow: visible !important;
  padding: 0.85rem 1.25rem 1.25rem !important;
  border-top: 1px solid var(--border-light) !important;
  color: var(--text-main);
  font-size: 1rem;
  line-height: 1.7;
}

.faq-answer p {
  margin: 0 !important;
  line-height: 1.7 !important;
}

/* Previous / Next Article Navigation */
.post-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin: 2.5rem 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.nav-box {
  display: flex;
  flex-direction: column;
  padding: 1.25rem;
  background: var(--border-light);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.nav-box:hover {
  border-color: var(--primary);
  background: var(--card-bg);
  box-shadow: var(--shadow-md);
}

.nav-box-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-family: var(--font-en);
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.nav-box-title {
  font-weight: 700;
  color: var(--text-main);
  font-size: 1rem;
  line-height: 1.4;
}

/* Article Actions (Share / Copy) */
.article-share-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  margin: 1.5rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.copy-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--border-light);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-en);
}

.copy-link-btn:hover {
  background: var(--primary);
  color: #FFFFFF;
  border-color: var(--primary);
}

/* Sidebar */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: sticky;
  top: 95px;
}

.sidebar-widget {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.widget-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--secondary);
  margin-bottom: 1.25rem;
  font-family: var(--font-en);
}

.quick-links-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.quick-links-list li {
  margin-bottom: 0.6rem;
}

.quick-links-list a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  color: var(--text-main);
  padding: 0.4rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.quick-links-list a:hover {
  background: var(--border-light);
  color: var(--primary);
  padding-left: 0.75rem;
}

/* Footer (English Nav Links, Hindi Branding & Info) */
.site-footer {
  background: #002342;
  color: #E2E8F0;
  padding: 3.5rem 0 1.5rem;
  margin-top: auto;
  border-top: 4px solid var(--secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

.footer-brand .site-logo {
  color: #FFFFFF;
  margin-bottom: 1rem;
}

.footer-bio {
  color: #94A3B8;
  font-size: 0.95rem;
  line-height: 1.7;
}

.footer-heading {
  color: #FFFFFF;
  font-size: 1.1rem;
  font-family: var(--font-en);
  font-weight: 700;
  margin-bottom: 1.25rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-heading::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 35px;
  height: 2px;
  background: var(--secondary);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 0.65rem;
}

.footer-links a {
  color: #94A3B8;
  font-family: var(--font-en);
  font-size: 0.92rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--secondary);
  padding-left: 0.35rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.88rem;
  color: #94A3B8;
  font-family: var(--font-en);
}

/* Reading Progress Bar */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 4px;
  background: linear-gradient(90deg, var(--secondary), #FFB340);
  z-index: 1050;
  transition: width 0.1s ease;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--primary);
  color: #FFFFFF;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--secondary);
  transform: translateY(-3px);
}

/* Modal Search Overlay */
.search-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(4px);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
}

.search-modal.active {
  opacity: 1;
  visibility: visible;
}

.search-modal-content {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 680px;
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  transform: translateY(-20px);
  transition: transform 0.25s ease;
}

.search-modal.active .search-modal-content {
  transform: translateY(0);
}

.search-modal-header {
  display: flex;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.search-modal-input {
  flex-grow: 1;
  border: none;
  font-size: 1.15rem;
  background: transparent;
  color: var(--text-main);
  outline: none;
  font-family: var(--font-hi), var(--font-en);
  margin-left: 0.75rem;
}

.search-modal-close {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
}

.search-results-list {
  max-height: 400px;
  overflow-y: auto;
  padding: 1rem;
}

.search-result-item {
  padding: 0.85rem;
  border-radius: var(--radius-md);
  margin-bottom: 0.5rem;
  border: 1px solid var(--border-light);
  display: block;
  text-decoration: none;
  transition: var(--transition);
}

.search-result-item:hover {
  background: var(--border-light);
  border-color: var(--secondary);
}

.result-title {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--primary);
  margin-bottom: 0.25rem;
}

.result-snippet {
  font-size: 0.88rem;
  color: var(--text-muted);
}