:root {
  --color-primary: #5e35b1;
  --color-primary-light: #7e57c2;
  --color-primary-dark: #4527a0;
  --color-secondary: #1e88e5;
  --color-secondary-light: #42a5f5;
  --color-accent: #00acc1;
  --color-text-primary: #212121;
  --color-text-secondary: #616161;
  --color-background: #fafafa;
  --color-surface: #ffffff;
  --color-border: #e0e0e0;
  --shadow-sm: 0 2px 8px rgba(33, 33, 33, 0.08);
  --shadow-md: 0 10px 24px rgba(33, 33, 33, 0.14);
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

html,
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--color-background);
  color: var(--color-text-primary);
  line-height: 1.6;
}

.site-header nav {
  background-color: var(--color-surface);
  border-bottom: 1px solid rgba(94, 53, 177, 0.08);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
}

.brand-logo {
  color: var(--color-primary) !important;
  font-weight: 700;
  letter-spacing: -0.01em;
}

nav ul a {
  color: var(--color-text-primary) !important;
  font-weight: 500;
  transition: background-color var(--spacing-xs) ease, color var(--spacing-xs) ease;
}

nav ul a:hover,
nav ul li.active a {
  background-color: rgba(94, 53, 177, 0.12);
  color: var(--color-primary-dark) !important;
}

.sidenav li a {
  color: var(--color-text-primary);
  font-weight: 500;
}

.site-main {
  padding: var(--spacing-xl) 0;
}

.hero-section {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary-dark));
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  color: #ffffff;
  margin-bottom: var(--spacing-xl);
  overflow: hidden;
  padding: var(--spacing-xl) var(--spacing-lg);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  margin-bottom: var(--spacing-sm);
  opacity: 0.85;
}

.hero-title {
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 600;
  margin: 0 0 var(--spacing-sm);
}

.hero-lead {
  font-size: 1.15rem;
  margin-bottom: var(--spacing-md);
  max-width: 60ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.hero-actions .btn-large {
  background-color: var(--color-secondary);
}

.hero-actions .btn-large:hover {
  background-color: var(--color-secondary-light);
}

.hero-actions .hero-secondary {
  border: 1px solid rgba(255, 255, 255, 0.45);
  background-color: rgba(255, 255, 255, 0.12);
  color: #ffffff !important;
}

.hero-actions .hero-secondary:hover {
  background-color: rgba(255, 255, 255, 0.22);
}

.focus-grid {
  margin-bottom: var(--spacing-xl);
}

.focus-card {
  background: linear-gradient(145deg, rgba(94, 53, 177, 0.08), rgba(94, 53, 177, 0.04));
  border-radius: 12px;
  padding: var(--spacing-lg);
  height: 100%;
  box-shadow: var(--shadow-sm);
}

.focus-card h5 {
  align-items: center;
  color: var(--color-primary-dark);
  display: flex;
  font-weight: 600;
  gap: var(--spacing-xs);
  margin-top: 0;
}

.focus-card p {
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

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

.section-header h4 {
  margin: 0;
  font-weight: 600;
}

.section-header .chip {
  background-color: rgba(94, 53, 177, 0.12);
  color: var(--color-primary-dark);
  font-weight: 600;
}

.article-card {
  border-radius: 12px;
  box-shadow: none;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

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

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

.article-meta {
  color: var(--color-text-secondary);
  display: flex;
  gap: var(--spacing-xs);
  font-size: 0.95rem;
  align-items: center;
}

.article-meta .material-icons {
  font-size: 18px;
}

.article-card .card-title {
  color: var(--color-primary-dark);
  font-size: 1.4rem !important;
  line-height: 1.3;
}

.article-card p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.article-card .chip {
  background-color: rgba(94, 53, 177, 0.16);
  color: var(--color-primary-dark);
  font-weight: 500;
}

.article-card .card-action {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-sm) var(--spacing-lg);
}

.article-card .card-action a {
  color: var(--color-secondary) !important;
  font-weight: 600;
}

.post-article {
  display: grid;
  gap: var(--spacing-lg);
}

.post-header {
  background: var(--color-surface);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-xl) var(--spacing-lg);
}

.post-kicker {
  color: var(--color-secondary);
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
}

.post-title {
  font-size: clamp(2.2rem, 4vw, 2.8rem);
  font-weight: 700;
  margin: var(--spacing-sm) 0;
}

.post-meta {
  color: var(--color-text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  font-weight: 500;
}

.post-meta span {
  align-items: center;
  display: inline-flex;
  gap: var(--spacing-xs);
}

.post-excerpt {
  color: var(--color-text-secondary);
  font-size: 1.15rem;
  margin-bottom: 0;
  max-width: 65ch;
}

.post-hero {
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  margin: 0;
  overflow: hidden;
}

.post-content {
  background: var(--color-surface);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-xl) var(--spacing-lg);
}

.post-content h2,
.post-content h3 {
  color: var(--color-primary-dark);
  margin-top: var(--spacing-lg);
}

.post-content blockquote {
  border-left: 4px solid var(--color-primary-light);
  font-size: 1.1rem;
  margin: var(--spacing-lg) 0;
  padding-left: var(--spacing-md);
}

.post-content table {
  border: 1px solid var(--color-border);
  border-collapse: collapse;
  width: 100%;
}

.post-content th,
.post-content td {
  border: 1px solid var(--color-border);
  padding: 0.75rem 1rem;
}

.post-share {
  align-items: center;
  background: var(--color-surface);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
}

.post-share .share-label {
  font-weight: 600;
  margin-right: var(--spacing-sm);
}

.post-share .chip {
  background-color: rgba(30, 136, 229, 0.12);
  color: var(--color-secondary);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.post-tags .chip {
  background-color: rgba(94, 53, 177, 0.14);
  color: var(--color-primary-dark);
  font-weight: 500;
}

.post-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.post-actions .btn-flat {
  color: var(--color-secondary) !important;
  font-weight: 600;
}

.tags-page .tag-hero {
  background: linear-gradient(135deg, rgba(94, 53, 177, 0.1), rgba(66, 165, 245, 0.12));
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-xl) var(--spacing-lg);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-lg);
}

.tag-cloud .chip {
  background-color: rgba(94, 53, 177, 0.14);
  color: var(--color-primary-dark);
  font-weight: 500;
}

.tag-group {
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-lg);
}

.tag-title {
  color: var(--color-primary);
  font-weight: 600;
  margin-top: 0;
}

.tag-article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tag-article-meta span {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.footer-content {
  align-items: flex-start;
  gap: var(--spacing-lg);
}

.footer-title {
  color: var(--color-primary);
  font-weight: 600;
}

.footer-description {
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.footer-heading {
  font-weight: 600;
  margin-top: 0;
}

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

.footer-links li + li {
  margin-top: 0.5rem;
}

.footer-links a {
  color: var(--color-secondary) !important;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  margin-top: var(--spacing-lg);
  padding: var(--spacing-sm) 0;
}

@media (max-width: 992px) {
  .hero-section {
    padding: var(--spacing-lg);
  }
  .focus-card {
    padding: var(--spacing-md);
  }
  .post-content,
  .post-header {
    padding: var(--spacing-lg);
  }
}

@media (max-width: 600px) {
  .site-main {
    padding: var(--spacing-lg) 0;
  }
  .hero-title {
    font-size: 2rem;
  }
  .hero-lead {
    font-size: 1.05rem;
  }
  .post-actions {
    flex-direction: column;
    align-items: stretch;
  }
}