/* ==========================================================================
   PREMIUM LANDING PAGES - BILLION-DOLLAR HEALTH TECH QUALITY
   Modern, minimal, dynamic, trustworthy
   ========================================================================== */

/* ==========================================================================
   HOME PAGE - HERO & INTRO
   ========================================================================== */

.handbook-home-page {
  min-height: calc(100vh - 60px);
  padding: 0;
}

/* Hero Section */
.handbook-home-hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-20) var(--space-6) var(--space-16);
  text-align: center;
}

@media (max-width: 768px) {
  .handbook-home-hero {
    padding: var(--space-12) var(--space-4) var(--space-10);
  }
}

.handbook-home-hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-6) 0;
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.dark .handbook-home-hero-title {
  background: linear-gradient(135deg, var(--color-dark-text-primary) 0%, var(--color-dark-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.handbook-home-hero-description {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  line-height: 1.6;
  color: var(--color-text-secondary);
  max-width: 680px;
  margin: 0 auto var(--space-10);
}

.dark .handbook-home-hero-description {
  color: var(--color-dark-text-secondary);
}

/* Intro Content (if exists) */
.handbook-home-intro {
  max-width: 800px;
  margin: var(--space-8) auto 0;
  padding: 0 var(--space-6);
  text-align: left;
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.dark .handbook-home-intro {
  color: var(--color-dark-text-secondary);
}

.handbook-home-intro h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-4) 0;
  border: none;
  padding: 0;
}

.handbook-home-intro p {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin: 0;
}

.dark .handbook-home-intro p {
  color: var(--color-dark-text-secondary);
}

/* ==========================================================================
   SEARCH - PREMIUM STYLING
   ========================================================================== */

.search-container {
  max-width: 800px;
  margin: 0 auto var(--space-16);
  padding: 0 var(--space-6);
}

@media (max-width: 768px) {
  .search-container {
    margin-bottom: var(--space-12);
    padding: 0 var(--space-4);
  }
}

.search-input-wrapper {
  position: relative;
  width: 100%;
}

.search-icon {
  position: absolute;
  left: var(--space-5);
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: var(--color-text-tertiary);
  pointer-events: none;
  z-index: 1;
}

.dark .search-icon {
  color: var(--color-dark-text-tertiary);
}

.search-input {
  width: 100%;
  height: 64px;
  padding: 0 var(--space-5) 0 calc(var(--space-5) * 2 + 20px);
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  border: 2px solid var(--color-border-primary);
  border-radius: 12px;
  transition: all var(--transition-base);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.dark .search-input {
  background-color: var(--color-dark-bg-secondary);
  border-color: var(--color-dark-border);
  color: var(--color-dark-text-primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-info-accent);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1), 0 4px 12px rgba(0, 0, 0, 0.1);
}

.dark .search-input:focus {
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15), 0 4px 12px rgba(0, 0, 0, 0.3);
}

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

.dark .search-input::placeholder {
  color: var(--color-dark-text-tertiary);
}

@media (max-width: 768px) {
  .search-input {
    height: 56px;
    font-size: 16px; /* Prevents zoom on iOS */
  }
}

/* ==========================================================================
   HOME SECTIONS - PREMIUM LAYOUT
   ========================================================================== */

.handbook-home-sections {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-6) var(--space-20);
}

@media (max-width: 768px) {
  .handbook-home-sections {
    padding: 0 var(--space-4) var(--space-12);
  }
}

.handbook-home-section {
  margin-bottom: var(--space-16);
}

.handbook-home-section:last-child {
  margin-bottom: 0;
}

.handbook-section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-2) 0;
  padding: 0;
  border: none;
}

.dark .handbook-section-title {
  color: var(--color-dark-text-primary);
}

.handbook-section-title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base);
}

.handbook-section-title a:hover {
  color: var(--color-info-accent);
}

.handbook-section-description {
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-8) 0;
}

.dark .handbook-section-description {
  color: var(--color-dark-text-secondary);
}

/* ==========================================================================
   ARTICLE CARDS - PREMIUM GRID
   ========================================================================== */

.handbook-article-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-6);
}

@media (max-width: 768px) {
  .handbook-article-list {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

.handbook-article-card {
  position: relative;
  padding: var(--space-6);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-primary);
  border-radius: 12px;
  transition: all var(--transition-base);
  cursor: pointer;
  overflow: hidden;
}

.dark .handbook-article-card {
  background-color: var(--color-dark-bg-secondary);
  border-color: var(--color-dark-border);
}

.handbook-article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-info-accent), var(--color-regulatory-accent));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.handbook-article-card:hover {
  border-color: var(--color-info-accent);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.04);
  transform: translateY(-2px);
}

.dark .handbook-article-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3), 0 1px 4px rgba(0, 0, 0, 0.2);
}

.handbook-article-card:hover::before {
  opacity: 1;
}

.handbook-article-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.handbook-article-card h2,
.handbook-article-card h3 {
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-3) 0;
  padding: 0;
  border: none;
  transition: color var(--transition-base);
}

.dark .handbook-article-card h2,
.dark .handbook-article-card h3 {
  color: var(--color-dark-text-primary);
}

.handbook-article-card:hover h2,
.handbook-article-card:hover h3 {
  color: var(--color-info-accent);
}

.handbook-article-description {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-4) 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.dark .handbook-article-description {
  color: var(--color-dark-text-secondary);
}

.handbook-article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-tertiary);
  letter-spacing: 0.01em;
}

.dark .handbook-article-meta {
  color: var(--color-dark-text-tertiary);
}

.handbook-article-meta-item {
  display: inline;
}

.meta-separator {
  color: var(--color-text-disabled);
  margin: 0 var(--space-1);
}

.dark .meta-separator {
  color: var(--color-dark-text-tertiary);
}

.handbook-section-more {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-primary);
  text-align: center;
}

.dark .handbook-section-more {
  border-top-color: var(--color-dark-border);
}

.handbook-section-more a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-info-accent);
  text-decoration: none;
  transition: all var(--transition-base);
}

.handbook-section-more a:hover {
  color: var(--color-link-hover);
  gap: var(--space-3);
}

/* ==========================================================================
   LIST PAGES - PREMIUM HEADER
   ========================================================================== */

.handbook-list-page {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-12) var(--space-6) var(--space-16);
}

@media (max-width: 768px) {
  .handbook-list-page {
    padding: var(--space-8) var(--space-4) var(--space-12);
  }
}

.handbook-page-header {
  margin-bottom: var(--space-12);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border-primary);
}

.dark .handbook-page-header {
  border-bottom-color: var(--color-dark-border);
}

.handbook-page-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-4) 0;
}

.dark .handbook-page-title {
  color: var(--color-dark-text-primary);
}

.handbook-page-description {
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-4) 0;
}

.dark .handbook-page-description {
  color: var(--color-dark-text-secondary);
}

.handbook-page-intro {
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-top: var(--space-4);
}

.dark .handbook-page-intro {
  color: var(--color-dark-text-secondary);
}

/* ==========================================================================
   PAGINATION - PREMIUM STYLING
   ========================================================================== */

.handbook-pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border-primary);
}

.dark .handbook-pagination {
  border-top-color: var(--color-dark-border);
}

.handbook-pagination-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  text-decoration: none;
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-primary);
  border-radius: 8px;
  transition: all var(--transition-base);
}

.dark .handbook-pagination-link {
  background-color: var(--color-dark-bg-secondary);
  border-color: var(--color-dark-border);
  color: var(--color-dark-text-primary);
}

.handbook-pagination-link:hover {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-info-accent);
  color: var(--color-info-accent);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.dark .handbook-pagination-link:hover {
  background-color: var(--color-dark-bg-tertiary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.handbook-pagination-info {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-tertiary);
}

.dark .handbook-pagination-info {
  color: var(--color-dark-text-tertiary);
}

/* ==========================================================================
   EMPTY STATE
   ========================================================================== */

.handbook-empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-6);
  color: var(--color-text-secondary);
}

.dark .handbook-empty-state {
  color: var(--color-dark-text-secondary);
}

.handbook-empty-state h2 {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-3) 0;
}

.dark .handbook-empty-state h2 {
  color: var(--color-dark-text-primary);
}

.handbook-empty-state p {
  font-size: var(--text-base);
  margin: 0;
}

/* ==========================================================================
   SEARCH RESULTS - PREMIUM STYLING
   ========================================================================== */

.search-results {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  max-height: 480px;
  overflow-y: auto;
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-primary);
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.08);
  z-index: 1000;
  display: none;
  -webkit-overflow-scrolling: touch;
}

.dark .search-results {
  background-color: var(--color-dark-bg-secondary);
  border-color: var(--color-dark-border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.3);
}

.search-results.active {
  display: block;
  animation: fadeInUp 0.2s ease-out;
}

.search-result-item {
  display: block;
  padding: var(--space-4) var(--space-5);
  text-decoration: none;
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border-primary);
  transition: background-color var(--transition-base);
}

.dark .search-result-item {
  color: var(--color-dark-text-primary);
  border-bottom-color: var(--color-dark-border);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background-color: var(--color-bg-tertiary);
}

.dark .search-result-item:hover {
  background-color: var(--color-dark-bg-tertiary);
}

.search-result-title {
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-1) 0;
}

.dark .search-result-title {
  color: var(--color-dark-text-primary);
}

.search-result-title mark {
  background-color: rgba(59, 130, 246, 0.2);
  color: inherit;
  padding: 0 2px;
  border-radius: 2px;
}

.dark .search-result-title mark {
  background-color: rgba(59, 130, 246, 0.3);
}

.search-result-description {
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-2) 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.dark .search-result-description {
  color: var(--color-dark-text-secondary);
}

.search-result-meta {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  font-family: var(--font-family-mono);
}

.dark .search-result-meta {
  color: var(--color-dark-text-tertiary);
}

.search-no-results {
  padding: var(--space-8) var(--space-5);
  text-align: center;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.dark .search-no-results {
  color: var(--color-dark-text-secondary);
}

/* ==========================================================================
   ANIMATIONS - SUBTLE & PROFESSIONAL
   ========================================================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.handbook-article-card {
  animation: fadeInUp 0.4s ease-out backwards;
}

.handbook-article-card:nth-child(1) { animation-delay: 0.05s; }
.handbook-article-card:nth-child(2) { animation-delay: 0.1s; }
.handbook-article-card:nth-child(3) { animation-delay: 0.15s; }
.handbook-article-card:nth-child(4) { animation-delay: 0.2s; }
.handbook-article-card:nth-child(5) { animation-delay: 0.25s; }
.handbook-article-card:nth-child(6) { animation-delay: 0.3s; }

@media (prefers-reduced-motion: reduce) {
  .handbook-article-card {
    animation: none;
  }
  
  .handbook-article-card:hover {
    transform: none;
  }
  
  .handbook-pagination-link:hover {
    transform: none;
  }
}

/* ==========================================================================
   RESPONSIVE REFINEMENTS
   ========================================================================== */

@media (min-width: 1024px) {
  .handbook-article-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1400px) {
  .handbook-article-list {
    grid-template-columns: repeat(3, 1fr);
  }
}