:root {
  --primary: #1D6655;
  --primary-dark: #145242;
  --primary-light: #2A8F7D;
  --secondary: #F8F9FA;
  --accent: #E67E22;
  --text-primary: #212529;
  --text-secondary: #6C757D;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Source Sans Pro', sans-serif;
  color: var(--text-primary);
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Playfair Display', serif;
}

.brand-text {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
  color: var(--primary);
  font-size: 1.5rem;
}

.site-brand-logo {
  display: block;
  width: auto;
  height: 42px;
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
}

.site-header .navbar {
  padding: 1rem 0;
}

.site-header .nav-link {
  font-weight: 500;
  color: var(--text-primary);
  transition: color 0.3s;
}

.site-header .nav-link:hover {
  color: var(--primary);
}

.search-suggestions {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  right: 0;
  z-index: 20;
  display: none;
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 0.75rem;
  box-shadow: 0 18px 35px rgba(0, 0, 0, 0.12);
  overflow: hidden;
}

.search-suggestions.show {
  display: block;
}

.search-suggestion-item {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.search-suggestion-item:hover {
  background: rgba(29, 102, 85, 0.08);
  color: var(--primary);
}

.search-suggestion-item:last-child {
  border-bottom: 0;
}

.hero-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
}

.hero-section .display-4 {
  color: white;
}

.hero-content .btn-primary {
  background: var(--accent);
  border-color: var(--accent);
}

.hero-content .btn-primary:hover {
  background: #d35400;
  border-color: #d35400;
}

.category-card {
  transition: transform 0.3s, box-shadow 0.3s;
}

.category-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1) !important;
}

.blog-card {
  transition: transform 0.3s;
}

.blog-card:hover {
  transform: translateY(-5px);
}

.blog-card .card-title a {
  transition: color 0.3s;
}

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

.post-content {
  font-size: 1.1rem;
  line-height: 1.8;
}

.post-content p {
  margin-bottom: 1.5rem;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: center;
}

.post-reading-time,
.post-toc {
  color: var(--text-secondary);
}

.post-toc {
  background: #f8f9fa;
  border-radius: 1rem;
  padding: 1rem;
  margin: 1.5rem 0;
}

.post-toc ol,
.post-toc ul {
  margin-bottom: 0;
  padding-left: 1.25rem;
}

.post-toc a {
  text-decoration: none;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.post-content ul,
.post-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.post-content pre {
  background: #f5f5f5;
  padding: 1rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.post-content blockquote {
  border-left: 4px solid var(--primary);
  padding-left: 1rem;
  margin: 1.5rem 0;
  font-style: italic;
}

.site-footer {
  margin-top: 4rem;
}

.site-footer a {
  transition: color 0.3s;
}

.site-footer a:hover {
  color: white !important;
}

.bg-primary {
  background-color: var(--primary) !important;
}

.btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
}

.text-primary {
  color: var(--primary) !important;
}

.badge.bg-primary {
  background-color: var(--primary) !important;
}

.pagination .page-link {
  color: var(--primary);
}

.pagination .page-item.active .page-link {
  background-color: var(--primary);
  border-color: var(--primary);
}

.stat-icon,
.mission-icon,
.contact-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cta-section {
  background-color: var(--primary);
}

.quiz-card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  border-radius: 1.25rem;
}

.quiz-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.08) !important;
}

.quiz-hero {
  background: linear-gradient(135deg, rgba(29, 102, 85, 0.08), rgba(29, 102, 85, 0.02));
}

.quiz-meta {
  color: var(--text-secondary);
}

.quiz-timer {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 0.08em;
}

.quiz-timer.is-low {
  color: #dc3545;
}

.quiz-question-card {
  border-radius: 1.25rem;
}

.quiz-options {
  display: grid;
  gap: 0.75rem;
}

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.85rem 1rem 0.85rem 2.3rem;
  border: 1px solid rgba(29, 102, 85, 0.12);
  border-radius: 1rem;
  background: #fff;
  cursor: pointer;
  user-select: none;
  position: relative;
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.quiz-option:hover {
  background: rgba(29, 102, 85, 0.04);
  border-color: rgba(29, 102, 85, 0.28);
  box-shadow: 0 0.75rem 1.5rem rgba(29, 102, 85, 0.08);
  transform: translateY(-1px);
}

.quiz-option .form-check-input {
  margin: 0.2rem 0 0;
  flex: 0 0 auto;
}

.quiz-option .quiz-option-text {
  flex: 1 1 auto;
  line-height: 1.5;
}

.quiz-option .form-check-input:checked + .quiz-option-text {
  font-weight: 600;
}

.quiz-option.is-selected {
  background: rgba(29, 102, 85, 0.08);
  border-color: rgba(29, 102, 85, 0.35);
  box-shadow: 0 0.85rem 1.6rem rgba(29, 102, 85, 0.1);
}

.quiz-progress-summary {
  border: 0;
  background: rgba(29, 102, 85, 0.08);
}

.sticky-bottom-actions {
  position: sticky;
  bottom: 1rem;
  z-index: 10;
  padding: 1rem 1.25rem;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 1rem;
  box-shadow: 0 16px 30px rgba(0, 0, 0, 0.08);
}

.quiz-result-stat {
  padding: 1.25rem;
  border-radius: 1rem;
  background: #fff;
  border: 1px solid rgba(29, 102, 85, 0.1);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.05);
}

.quiz-result-stat span {
  display: block;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.quiz-result-stat strong {
  font-size: 1.75rem;
  color: var(--primary);
}

.quiz-review {
  display: grid;
  gap: 1rem;
}

.quiz-review-item {
  padding: 1rem 1.1rem;
  border-radius: 1rem;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.quiz-review-item.correct {
  background: rgba(25, 135, 84, 0.04);
}

.quiz-review-item.wrong {
  background: rgba(220, 53, 69, 0.04);
}

.quiz-side-card {
  position: sticky;
  top: 96px;
}

.auth-page {
  background:
    radial-gradient(circle at top left, rgba(29, 102, 85, 0.08), transparent 30%),
    linear-gradient(180deg, #f8fbfd 0%, #eef5f3 100%);
  min-height: calc(100vh - 100px);
}

.auth-card {
  border-radius: 1.5rem;
}

.profile-dashboard .stat-card {
  border: 1px solid rgba(29, 102, 85, 0.08);
}

.quiz-summary-list li {
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.quiz-summary-list li:last-child {
  border-bottom: 0;
}

@media (max-width: 768px) {
  .hero-content {
    text-align: center;
  }

  .hero-content .display-4 {
    font-size: 2rem;
  }

  .quiz-timer {
    font-size: 1.5rem;
  }

  .site-brand-logo {
    height: 34px;
  }
}