/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Source+Code+Pro:wght@400;500&display=swap');

:root {
  --white: #FFFFFF;
  --bg-subtle: #F9FAFB;
  --slate: #1E293B;
  --blue-gray: #64748B;
  --accent-blue: #3B82F6;
  --accent-blue-dark: #2563EB;
  --border-light: #E2E8F0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg-subtle);
  color: var(--slate);
  line-height: 1.7;
  font-size: 16px;
  font-weight: 400;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-blue-dark);
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--border-light);
  padding: 1.25rem 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-title {
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 1.5px;
  color: var(--slate);
}

.site-title:hover {
  color: var(--slate);
}

.site-nav {
  display: flex;
  gap: 2rem;
  font-weight: 500;
  font-size: 0.95rem;
}

.site-nav a {
  color: var(--blue-gray);
  transition: color 0.2s ease;
}

.site-nav a:hover {
  color: var(--accent-blue);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 5rem 0 3rem;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 3rem;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  margin: 0 0 1rem;
  letter-spacing: 2px;
  font-weight: 800;
  color: var(--slate);
}

.hero-subtitle {
  margin: 0 0 2rem;
  font-size: 1.15rem;
  color: var(--blue-gray);
  font-weight: 400;
}

.hero-lede {
  max-width: 680px;
  margin: 0 auto 2.5rem;
  color: var(--slate);
  font-size: 1.05rem;
  line-height: 1.8;
}

.hero-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.hero-links a {
  font-weight: 600;
  font-size: 1rem;
  color: var(--accent-blue);
  transition: color 0.2s ease;
}

.hero-links a:hover {
  color: var(--accent-blue-dark);
}

/* Home Sections */
.home-section {
  margin: 4rem 0;
}

.home-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 2rem;
  color: var(--slate);
  letter-spacing: -0.5px;
}

.home-section ul {
  line-height: 1.8;
}

.home-section li {
  margin-bottom: 0.5rem;
  color: var(--slate);
}

/* Post List */
.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-list-item {
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border-light);
}

.post-list-item:first-child {
  padding-top: 0;
}

.post-list-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.post-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.post-title {
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--accent-blue);
  flex: 1;
}

.post-title:hover {
  color: var(--accent-blue-dark);
}

.post-date {
  color: var(--blue-gray);
  font-size: 0.9rem;
  font-weight: 400;
  white-space: nowrap;
  flex-shrink: 0;
}

.post-summary {
  margin: 0;
  color: var(--blue-gray);
  line-height: 1.6;
  font-size: 0.95rem;
}

/* Section Pages */
.section-header {
  margin: 2rem 0 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-light);
}

.section-header h1 {
  font-size: 2rem;
  font-weight: 800;
  margin: 0 0 0.5rem;
  color: var(--slate);
  letter-spacing: -0.5px;
}

.section-description {
  color: var(--blue-gray);
  font-size: 1.05rem;
  margin: 0;
}

.section-body {
  margin-top: 1rem;
  color: var(--slate);
}

/* Individual Pages */
.page {
  max-width: 720px;
  margin: 2.5rem auto;
  padding: 2.5rem 0;
}

.page h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin: 0 0 0.5rem;
  color: var(--slate);
  letter-spacing: -0.5px;
  line-height: 1.2;
}

.page-date {
  color: var(--blue-gray);
  margin: 0 0 2rem;
  font-size: 0.95rem;
}

.page-body {
  color: var(--slate);
  font-size: 1.05rem;
  line-height: 1.8;
}

.page-body h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
  color: var(--slate);
}

.page-body h3 {
  font-size: 1.35rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  color: var(--slate);
}

.page-body p {
  margin: 1rem 0;
}

.page-body ul,
.page-body ol {
  padding-left: 1.5rem;
  margin: 1rem 0;
}

.page-body li {
  margin-bottom: 0.5rem;
}

.page-body code {
  font-family: 'Source Code Pro', monospace;
  font-size: 0.9em;
  background: #F1F5F9;
  padding: 0.2em 0.4em;
  border-radius: 3px;
  color: var(--slate);
}

.page-body pre {
  font-family: 'Source Code Pro', monospace;
  background: #F1F5F9;
  padding: 1.25rem;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.6;
}

.page-body pre code {
  background: none;
  padding: 0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-light);
  background: var(--white);
  margin-top: 5rem;
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--blue-gray);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--blue-gray);
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--accent-blue);
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 1.5rem;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .site-nav {
    gap: 1.25rem;
    flex-wrap: wrap;
  }

  .hero {
    padding: 3rem 0 2rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-lede {
    font-size: 1rem;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .page {
    padding: 2rem 0;
  }

  .page h1 {
    font-size: 1.75rem;
  }
}

@media (max-width: 480px) {
  .site-nav {
    font-size: 0.9rem;
    gap: 1rem;
  }

  .hero-links {
    flex-direction: column;
    align-items: center;
  }

  .hero-links a {
    width: 100%;
    max-width: 200px;
    text-align: center;
  }
}