@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&family=Inter:wght@400;500;600&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');

:root {
  /* Modern Developer Light Theme */
  --bg-color: #f9fafb; /* gray-50 */
  --surface-color: #ffffff;
  --text-primary: #111827; /* gray-900 */
  --text-secondary: #4b5563; /* gray-600 */
  --text-tertiary: #9ca3af; /* gray-400 */
  --border-color: #e5e7eb; /* gray-200 */
  --border-hover: #d1d5db; /* gray-300 */
  --accent-color: #2563eb; /* blue-500 */
  --accent-hover: #1d4ed8; /* blue-600 */
  
  /* Code blocks get a dark theme for contrast */
  --code-bg: #1f2937; /* gray-800 */
  --code-text: #e5e7eb;
  --inline-code-bg: #f3f4f6; /* gray-100 */
  --inline-code-text: #db2777; /* pink-600 */

  --font-display: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'Fira Code', ui-monospace, SFMono-Regular, monospace;

  --max-width: 1024px;
  --reading-width: 720px;
  --header-height: 72px;
  
  --radius-md: 12px;
  --radius-lg: 24px;
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.05), 0 4px 6px -4px rgb(0 0 0 / 0.05);
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

::selection {
  background-color: rgba(37, 99, 235, 0.2);
  color: var(--accent-hover);
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 50;
  display: flex;
  align-items: center;
}

.header-inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-color);
  border-radius: 50%;
}

.site-nav {
  display: flex;
  gap: 32px;
}

.site-nav a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.site-nav a:hover, .site-nav a.active {
  color: var(--text-primary);
}

/* Main Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--header-height) + 64px) 24px 80px;
}

/* Hero Section */
.hero {
  padding: 40px 0 80px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  background-color: rgba(37, 99, 235, 0.1);
  color: var(--accent-color);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 24px;
  font-family: var(--font-display);
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: -0.04em;
  margin-bottom: 24px;
  max-width: 800px;
  background: linear-gradient(135deg, #111827 0%, #4b5563 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Article Grid */
.section-heading {
  font-size: 1.5rem;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 32px;
}

.article-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

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

.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 0.875rem;
  color: var(--text-tertiary);
  font-weight: 500;
}

.card-meta time {
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: 12px;
  line-height: 1.3;
}

.article-card:hover .card-title {
  color: var(--accent-color);
}

.card-excerpt {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 24px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  background-color: var(--bg-color);
  color: var(--text-secondary);
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

/* Post Layout */
.post-container {
  max-width: var(--reading-width);
  margin: 0 auto;
  padding-bottom: 80px;
}

.post-header {
  margin-bottom: 56px;
}

.post-date {
  font-family: var(--font-mono);
  color: var(--accent-color);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 16px;
  display: block;
}

.post-title {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  margin-bottom: 24px;
  line-height: 1.1;
}

.post-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Markdown Content Styling */
.prose {
  font-size: 1.125rem;
  color: var(--text-primary);
}

.prose > * + * {
  margin-top: 1.5em;
}

.prose h2 {
  font-size: 2rem;
  margin-top: 2em;
  margin-bottom: 0.75em;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--border-color);
}

.prose h3 {
  font-size: 1.5rem;
  margin-top: 1.5em;
  margin-bottom: 0.75em;
}

.prose p {
  color: var(--text-secondary);
}

.prose ul, .prose ol {
  padding-left: 1.5em;
  color: var(--text-secondary);
}

.prose li {
  margin-bottom: 0.5em;
}

.prose li::marker {
  color: var(--text-tertiary);
}

.prose strong {
  color: var(--text-primary);
  font-weight: 600;
}

.prose blockquote {
  border-left: 4px solid var(--accent-color);
  background-color: rgba(37, 99, 235, 0.05);
  padding: 1.5em 1.5em 1.5em 2em;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-primary);
  font-style: normal;
  font-weight: 500;
}

.prose blockquote p {
  color: inherit;
  margin: 0;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--inline-code-bg);
  color: var(--inline-code-text);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-weight: 500;
}

.prose pre {
  background-color: var(--code-bg);
  color: var(--code-text);
  padding: 1.5em;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 2em 0;
  box-shadow: var(--shadow-md);
}

.prose pre code {
  background-color: transparent;
  color: inherit;
  padding: 0;
  font-size: 0.9em;
  font-weight: 400;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

/* Animation */
.animate-in {
  animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  opacity: 0;
  transform: translateY(20px);
}

@keyframes slideUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.25rem;
  }
  .article-grid {
    grid-template-columns: 1fr;
  }
  .post-title {
    font-size: 2.25rem;
  }
}