/*!
 * BusinessPulse AI - Main Stylesheet
 * Version: 1.0.0
 */

/* ==========================================================================
   CSS Custom Properties
   ========================================================================== */
:root {
  --color-white: #ffffff;
  --color-light: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;
  --color-black: #020617;
  --color-primary: #2563eb;
  --color-primary-light: #3b82f6;
  --color-primary-dark: #1d4ed8;
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-purple: #7c3aed;
  --color-cyan: #06b6d4;
  --color-green: #10b981;
  --color-amber: #f59e0b;
  --color-red: #ef4444;
  --color-violet: #8b5cf6;
  --color-pink: #ec4899;
  --color-emerald: #34d399;
  --color-sky: #38bdf8;

  --font-sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-serif: Georgia, "Times New Roman", Times, serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px 0 rgba(0,0,0,0.1), 0 1px 2px -1px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  --shadow-glass: 0 8px 32px rgba(0,0,0,0.12);

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;

  --content-width: 720px;
  --wide-width: 1200px;
  --sidebar-width: 320px;

  --header-height: 64px;
  --transition: 0.2s ease;
}

/* ==========================================================================
   Base / Reset
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-gray-900);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.2;
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--color-gray-900);
}

h1 { font-size: clamp(1.875rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p { margin-top: 0; margin-bottom: 1rem; }

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

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

small, .text-small { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }

.text-muted { color: var(--color-gray-500); }
.text-primary { color: var(--color-primary); }
.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ==========================================================================
   Container / Layout
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

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

.site-content {
  min-height: 60vh;
}

.content-area {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
}

@media (min-width: 1024px) {
  .has-sidebar .content-area {
    grid-template-columns: 1fr var(--sidebar-width);
  }
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-gray-200);
  transition: background var(--transition), border-color var(--transition);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  height: var(--header-height);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-gray-900);
}

.site-logo:hover {
  text-decoration: none;
}

.site-logo img {
  max-height: 36px;
  width: auto;
}

.main-navigation {
  display: none;
}

@media (min-width: 1024px) {
  .main-navigation {
    display: flex;
    align-items: center;
    gap: 1.5rem;
  }
}

.main-navigation ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 1.5rem;
}

.main-navigation li {
  position: relative;
}

.main-navigation a {
  display: block;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-600);
  padding: 0.5rem 0;
  position: relative;
  transition: color var(--transition);
}

.main-navigation a:hover,
.main-navigation .current-menu-item > a,
.main-navigation .current_page_item > a {
  color: var(--color-primary);
}

.main-navigation .menu-item-has-children > a::after {
  content: '';
  display: inline-block;
  width: 4px;
  height: 4px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  margin-left: 6px;
  margin-bottom: 2px;
}

.main-navigation .sub-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: -1rem;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: 0.5rem;
  min-width: 220px;
  box-shadow: var(--shadow-lg);
  z-index: 50;
}

.main-navigation .menu-item-has-children:hover > .sub-menu,
.main-navigation .menu-item-has-children:focus-within > .sub-menu {
  display: block;
}

.main-navigation .sub-menu a {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
}

.main-navigation .sub-menu a:hover {
  background: var(--color-gray-100);
}

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

.header-actions__search {
  display: flex;
  align-items: center;
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  padding: 0.5rem 1rem;
  gap: 0.5rem;
  border: 1px solid transparent;
  transition: all var(--transition);
}

.header-actions__search:focus-within {
  background: var(--color-white);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.header-actions__search input {
  background: none;
  border: 0;
  outline: 0;
  font-size: 0.8125rem;
  font-family: var(--font-sans);
  color: var(--color-gray-900);
  width: 160px;
}

.header-actions__search input::placeholder {
  color: var(--color-gray-400);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-gray-100);
  border: 0;
  cursor: pointer;
  color: var(--color-gray-600);
  font-size: 1rem;
  transition: all var(--transition);
}

.theme-toggle:hover {
  background: var(--color-gray-200);
  color: var(--color-gray-900);
}

/* ==========================================================================
   Mobile Menu Toggle
   ========================================================================== */
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-gray-900);
  border-radius: 2px;
  transition: all var(--transition);
}

@media (min-width: 1024px) {
  .mobile-menu-toggle {
    display: none;
  }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  position: relative;
  overflow: hidden;
  background: var(--color-light);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-2xl);
}

@media (min-width: 768px) {
  .hero-grid {
    grid-template-columns: 2fr 1fr;
    padding: var(--spacing-2xl) var(--spacing-lg) var(--spacing-3xl);
  }
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 3fr 2fr;
  }
}

.hero-main {
  position: relative;
}

.hero-main .post-thumbnail {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--spacing-md);
  position: relative;
}

.hero-main img {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 9;
  display: block;
}

.hero-main .category-badge {
  margin-bottom: var(--spacing-sm);
}

.hero-main .entry-title {
  font-size: clamp(1.5rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: var(--spacing-md);
}

.hero-main .entry-title a {
  color: var(--color-gray-900);
  text-decoration: none;
}

.hero-main .entry-title a:hover {
  color: var(--color-primary);
}

.hero-main .entry-excerpt {
  color: var(--color-gray-500);
  font-size: 1.0625rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.hero-main .entry-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  color: var(--color-gray-400);
  font-size: 0.875rem;
}

.hero-sidebar {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.hero-sidebar__title {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-sm);
}

.hero-side-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-gray-100);
}

.hero-side-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.hero-side-item .post-thumbnail {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.hero-side-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-side-item .entry-title {
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.25rem;
}

.hero-side-item .entry-title a {
  color: var(--color-gray-900);
  text-decoration: none;
}

.hero-side-item .entry-title a:hover {
  color: var(--color-primary);
}

.hero-side-item .entry-meta {
  font-size: 0.75rem;
  color: var(--color-gray-400);
}

/* ==========================================================================
   Breaking News Bar
   ========================================================================== */
.breaking-news-bar {
  background: var(--color-gray-900);
  color: var(--color-white);
  padding: 0.5rem 0;
  overflow: hidden;
}

.breaking-news__inner {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.breaking-news__label {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  background: var(--color-red);
  color: var(--color-white);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.025em;
  white-space: nowrap;
  animation: pulse-label 2s infinite;
}

@keyframes pulse-label {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.85; }
}

.breaking-news__items {
  display: flex;
  gap: var(--spacing-xl);
  white-space: nowrap;
  overflow: hidden;
}

.breaking-news__item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-gray-300);
  font-size: 0.8125rem;
  text-decoration: none;
}

.breaking-news__item:hover {
  color: var(--color-white);
}

.breaking-news__item .item-date {
  color: var(--color-gray-500);
  font-size: 0.75rem;
}

/* ==========================================================================
   Section Styles
   ========================================================================== */
.section {
  padding: var(--spacing-2xl) 0;
}

.section__inner {
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
}

.section-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-gray-200);
  min-width: 2rem;
}

.section-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
}

.section-link:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Article Grid
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

@media (min-width: 640px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .articles-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
  }
}

.articles-grid--cols-2 {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .articles-grid--cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.articles-grid--cols-4 {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .articles-grid--cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .articles-grid--cols-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ==========================================================================
   Article Card
   ========================================================================== */
.article-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-gray-200);
}

.article-card__image {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-gray-100);
}

.article-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

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

.article-card__badge {
  position: absolute;
  top: var(--spacing-sm);
  left: var(--spacing-sm);
  z-index: 2;
}

.article-card__body {
  padding: var(--spacing-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--spacing-sm);
}

.article-card__title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
  flex: 1;
}

.article-card__title a {
  color: var(--color-gray-900);
  text-decoration: none;
}

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

.article-card__excerpt {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  line-height: 1.5;
  margin-bottom: var(--spacing-md);
}

.article-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--color-gray-400);
  padding-top: var(--spacing-sm);
  border-top: 1px solid var(--color-gray-100);
  margin-top: auto;
}

/* ==========================================================================
   Single Article
   ========================================================================== */
.single-article {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-3xl);
}

.single-article__header {
  margin-bottom: var(--spacing-xl);
}

.single-article__categories {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.single-article__title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: var(--spacing-md);
}

.single-article__excerpt {
  font-size: 1.125rem;
  color: var(--color-gray-500);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
}

.single-article__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--color-gray-400);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-gray-200);
  margin-bottom: var(--spacing-xl);
}

.single-article__author {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.single-article__author-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  overflow: hidden;
}

.single-article__author-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.single-article__author-name {
  font-weight: 600;
  color: var(--color-gray-700);
}

.single-article__featured-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--spacing-xl);
}

.single-article__featured-image img {
  width: 100%;
  height: auto;
  display: block;
}

.single-article__body {
  font-size: 1.0625rem;
  line-height: 1.8;
}

.single-article__body p {
  margin-bottom: 1.25rem;
}

.single-article__body h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.single-article__body h3 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.single-article__body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  margin: 1.5rem 0;
}

.single-article__body blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--spacing-lg);
  margin: 1.5rem 0;
  color: var(--color-gray-600);
  font-style: italic;
}

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

.single-article__body li {
  margin-bottom: 0.5rem;
}

.single-article__footer {
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-gray-200);
}

/* ==========================================================================
   Article Components - AI Ready
   ========================================================================== */

/* Summary Box */
.summary-box {
  background: var(--color-primary-50);
  border: 1px solid var(--color-primary-100);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.summary-box__label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.summary-box__content {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-gray-700);
}

/* Key Highlights */
.key-highlights {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

@media (min-width: 640px) {
  .key-highlights {
    grid-template-columns: repeat(2, 1fr);
  }
}

.key-highlight {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-light);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary);
}

.key-highlight__icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.key-highlight__text {
  font-size: 0.875rem;
  color: var(--color-gray-700);
  line-height: 1.5;
}

/* Business Impact Cards */
.business-impact {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

@media (min-width: 640px) {
  .business-impact {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .business-impact {
    grid-template-columns: repeat(3, 1fr);
  }
}

.impact-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: box-shadow var(--transition);
}

.impact-card:hover {
  box-shadow: var(--shadow-md);
}

.impact-card__icon {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.impact-card__title {
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.impact-card__text {
  font-size: 0.8125rem;
  color: var(--color-gray-500);
  line-height: 1.5;
}

/* Score Cards */
.score-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-light);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
}

.score-card__value {
  font-size: 1.5rem;
  font-weight: 800;
  min-width: 48px;
  text-align: center;
}

.score-card__value.score--high { color: var(--color-green); }
.score-card__value.score--medium { color: var(--color-amber); }
.score-card__value.score--low { color: var(--color-red); }

.score-card__label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-gray-700);
}

.score-card__description {
  font-size: 0.75rem;
  color: var(--color-gray-500);
}

/* FAQ Accordion */
.faq-section {
  margin-bottom: var(--spacing-xl);
}

.faq-item {
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
}

.faq-item__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--spacing-md);
  background: var(--color-light);
  border: 0;
  text-align: left;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--font-sans);
  color: var(--color-gray-900);
  cursor: pointer;
  transition: background var(--transition);
}

.faq-item__question:hover {
  background: var(--color-gray-100);
}

.faq-item__question[aria-expanded="true"] {
  background: var(--color-primary-50);
}

.faq-item__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-item__question[aria-expanded="true"] .faq-item__icon {
  transform: rotate(180deg);
}

.faq-item__answer {
  display: none;
  padding: var(--spacing-md);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-gray-600);
}

.faq-item__answer[aria-hidden="false"] {
  display: block;
}

/* Comparison Table */
.comparison-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-gray-200);
  margin-bottom: var(--spacing-xl);
}

.comparison-table thead {
  background: var(--color-gray-900);
  color: var(--color-white);
}

.comparison-table th {
  padding: var(--spacing-md);
  font-size: 0.875rem;
  font-weight: 600;
  text-align: left;
}

.comparison-table td {
  padding: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--color-gray-700);
  border-top: 1px solid var(--color-gray-200);
}

.comparison-table tbody tr:nth-child(even) {
  background: var(--color-light);
}

.comparison-table tbody tr:hover {
  background: var(--color-primary-50);
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-gray-200);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--spacing-lg);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--spacing-xl) + 4px);
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  border: 2px solid var(--color-white);
  box-shadow: 0 0 0 2px var(--color-primary);
}

.timeline-item__date {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-xs);
}

.timeline-item__title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.timeline-item__text {
  font-size: 0.8125rem;
  color: var(--color-gray-500);
  line-height: 1.5;
}

/* Statistics Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

@media (min-width: 640px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-card {
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--color-light);
  border-radius: var(--radius-lg);
}

.stat-card__value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.stat-card__label {
  font-size: 0.75rem;
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

/* Callout Boxes */
.callout {
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  border-left: 4px solid;
}

.callout--info {
  background: var(--color-primary-50);
  border-color: var(--color-primary);
}

.callout--warning {
  background: #fefce8;
  border-color: var(--color-amber);
}

.callout--danger {
  background: #fef2f2;
  border-color: var(--color-red);
}

.callout--success {
  background: #f0fdf4;
  border-color: var(--color-green);
}

.callout__title {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.callout__text {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-gray-600);
}

/* Definition Blocks */
.definition-block {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-light);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
}

.definition-block__term {
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--color-primary);
  min-width: 100px;
  flex-shrink: 0;
}

.definition-block__description {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  line-height: 1.5;
}

/* ==========================================================================
   Table of Contents
   ========================================================================== */
.toc {
  background: var(--color-light);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.toc__title {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-md);
}

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

.toc__list li {
  margin-bottom: var(--spacing-sm);
}

.toc__list a {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  text-decoration: none;
  display: block;
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--color-gray-200);
  transition: color var(--transition);
}

.toc__list a:hover,
.toc__list a.active {
  color: var(--color-primary);
}

.toc__list .toc-h3 {
  padding-left: var(--spacing-md);
}

.toc__list .toc-h4 {
  padding-left: var(--spacing-xl);
}

/* ==========================================================================
   Social Sharing
   ========================================================================== */
.social-share {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
}

.social-share__label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-gray-500);
}

.social-share__buttons {
  display: flex;
  gap: var(--spacing-sm);
}

.social-share__button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-gray-100);
  color: var(--color-gray-600);
  font-size: 0.8125rem;
  font-weight: 700;
  text-decoration: none;
  transition: all var(--transition);
}

.social-share__button:hover {
  color: var(--color-white);
  text-decoration: none;
}

.social-share__button--twitter:hover { background: #1da1f2; }
.social-share__button--facebook:hover { background: #4267b2; }
.social-share__button--linkedin:hover { background: #0077b5; }
.social-share__button--email:hover { background: var(--color-gray-700); }

/* ==========================================================================
   Author Box
   ========================================================================== */
.author-box {
  display: flex;
  gap: var(--spacing-lg);
  padding: var(--spacing-xl);
  background: var(--color-light);
  border-radius: var(--radius-lg);
  margin: var(--spacing-xl) 0;
}

.author-box__avatar {
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  overflow: hidden;
}

.author-box__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.author-box__name {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.author-box__description {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  line-height: 1.5;
}

.author-box__social {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

/* ==========================================================================
   Related Articles
   ========================================================================== */
.related-articles {
  margin: var(--spacing-2xl) 0;
}

.related-articles__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
}

.related-articles__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

@media (min-width: 640px) {
  .related-articles__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .related-articles__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.related-article {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.related-article:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.related-article__image {
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.related-article__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.related-article:hover .related-article__image img {
  transform: scale(1.05);
}

.related-article__content {
  padding: var(--spacing-md);
}

.related-article__title {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
}

.related-article__title a {
  color: var(--color-gray-900);
  text-decoration: none;
}

.related-article__title a:hover {
  color: var(--color-primary);
}

.related-article__date {
  font-size: 0.75rem;
  color: var(--color-gray-400);
}

/* ==========================================================================
   Newsletter Section
   ========================================================================== */
.newsletter-section {
  background: linear-gradient(135deg, var(--color-light), var(--color-primary-50));
  padding: var(--spacing-3xl) var(--spacing-lg);
  text-align: center;
}

.newsletter-section__inner {
  max-width: 560px;
  margin: 0 auto;
}

.newsletter-section__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.newsletter-section__description {
  color: var(--color-gray-500);
  font-size: 1.0625rem;
  margin-bottom: var(--spacing-lg);
}

.newsletter-form {
  display: flex;
  gap: var(--spacing-sm);
  max-width: 480px;
  margin: 0 auto;
}

.newsletter-form input[type="email"] {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-family: var(--font-sans);
  outline: 0;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.newsletter-form input[type="email"]:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.newsletter-form .btn {
  flex-shrink: 0;
}

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

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-lg);
}

.site-footer__inner {
  max-width: var(--wide-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

@media (min-width: 640px) {
  .site-footer__inner {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .site-footer__inner {
    grid-template-columns: repeat(4, 1fr);
  }
}

.site-footer .widget-title {
  color: var(--color-white);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-md);
}

.site-footer a {
  color: var(--color-gray-400);
}

.site-footer a:hover {
  color: var(--color-white);
}

.site-footer__bottom {
  border-top: 1px solid var(--color-gray-800);
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-gray-500);
}

/* ==========================================================================
   Badges and Labels
   ========================================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.025em;
  white-space: nowrap;
}

.badge--danger { background: #fef2f2; color: var(--color-red); }
.badge--warning { background: #fefce8; color: #a16207; }
.badge--success { background: #f0fdf4; color: var(--color-green); }
.badge--info { background: var(--color-primary-50); color: var(--color-primary); }
.badge--primary { background: var(--color-primary-100); color: var(--color-primary-dark); }

/* ==========================================================================
   Reading Progress Bar
   ========================================================================== */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-purple));
  z-index: 9999;
  transition: width 0.1s linear;
}

/* ==========================================================================
   Search
   ========================================================================== */
.search-form {
  display: flex;
  gap: var(--spacing-sm);
  max-width: 480px;
}

.search-form input[type="search"] {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-family: var(--font-sans);
  outline: 0;
  transition: border-color var(--transition);
}

.search-form input[type="search"]:focus {
  border-color: var(--color-primary);
}

.search-results-count {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-lg);
}

.search-highlight {
  background: #fef08a;
  padding: 0.125rem 0.25rem;
  border-radius: 2px;
}

/* ==========================================================================
   Pagination
   ========================================================================== */
.pagination {
  margin: var(--spacing-2xl) 0;
}

.pagination .nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  list-style: none;
  padding: 0;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition);
}

.pagination a {
  color: var(--color-gray-600);
  background: var(--color-gray-100);
}

.pagination a:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.pagination .current {
  background: var(--color-primary);
  color: var(--color-white);
}

.pagination .dots {
  color: var(--color-gray-400);
  background: none;
}

/* ==========================================================================
   Comments
   ========================================================================== */
.comments-area {
  margin: var(--spacing-2xl) 0;
}

.comments-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
}

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

.comment {
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--color-gray-100);
}

.comment.depth-1 { margin-left: 0; }
.comment.depth-2 { margin-left: var(--spacing-xl); }
.comment.depth-3 { margin-left: calc(var(--spacing-xl) * 2); }

.comment__body {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.comment__meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.comment__author {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.comment__avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  overflow: hidden;
}

.comment__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.comment__author-name {
  font-size: 0.875rem;
  font-weight: 600;
}

.comment__time {
  font-size: 0.75rem;
  color: var(--color-gray-400);
}

.comment__content {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-gray-600);
}

.comment__actions {
  display: flex;
  gap: var(--spacing-md);
  font-size: 0.8125rem;
}

.comment-form {
  margin-top: var(--spacing-xl);
}

.comment-form label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-family: var(--font-sans);
  margin-bottom: var(--spacing-md);
  outline: 0;
  transition: border-color var(--transition);
}

.comment-form input:focus,
.comment-form textarea:focus {
  border-color: var(--color-primary);
}

.comment-form .form-submit {
  margin-top: var(--spacing-md);
}

/* ==========================================================================
   Sidebar / Widgets
   ========================================================================== */
.widget {
  margin-bottom: var(--spacing-xl);
}

.widget-title {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-gray-200);
}

.widget ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.widget li {
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-gray-100);
  font-size: 0.875rem;
}

.widget li:last-child {
  border-bottom: 0;
}

.widget a {
  color: var(--color-gray-600);
  text-decoration: none;
}

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

/* ==========================================================================
   404 Page
   ========================================================================== */
.error-404 {
  text-align: center;
  padding: var(--spacing-4xl) var(--spacing-lg);
}

.error-404__title {
  font-size: 6rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--spacing-md);
}

.error-404__text {
  font-size: 1.125rem;
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-xl);
}

/* ==========================================================================
   Accessibility Utilities
   ========================================================================== */
.screen-reader-text {
  border: 0;
  clip: rect(1px, 1px, 1px, 1px);
  -webkit-clip-path: inset(50%);
  clip-path: inset(50%);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
  word-wrap: normal !important;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 100000;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0.5rem 1rem;
  text-decoration: none;
  font-size: 0.875rem;
}

.skip-link:focus {
  top: 0;
  outline: 0;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
  .site-header,
  .site-footer,
  .sidebar,
  .reading-progress-bar,
  .social-share,
  .comments-area,
  .related-articles,
  .newsletter-section,
  .breadcrumbs,
  .ad-widget {
    display: none !important;
  }

  body {
    font-size: 12pt;
    color: #000;
    background: #fff;
  }

  a {
    color: #000 !important;
    text-decoration: underline;
  }

  img {
    max-width: 100% !important;
    page-break-inside: avoid;
  }

  h1, h2, h3, h4 {
    page-break-after: avoid;
  }
}