/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Astro-inspired color palette - modern and professional */
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-text-muted: #94a3b8;
  --color-background: #ffffff;
  --color-background-subtle: #f8fafc;
  --color-accent: #6366f1;
  --color-accent-hover: #4f46e5;
  --color-accent-light: #e0e7ff;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  
  /* Typography - Astro uses system fonts for performance */
  --font-serif: ui-serif, Georgia, Cambria, 'Times New Roman', Times, serif;
  --font-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Monaco, Consolas, monospace;
  
  /* Layout - wider, more spacious like Astro docs */
  --max-width: 1200px;
  --content-width: 800px;
  --spacing-unit: 1.5rem;
  --spacing-section: 4rem;
  
  /* Shadows for depth */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  
  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
}

body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography - Astro-inspired hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.2;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

h1 { 
  font-size: 2.5rem;
  font-weight: 800;
}
h2 { 
  font-size: 2rem;
  font-weight: 700;
}
h3 { 
  font-size: 1.5rem;
  font-weight: 600;
}

p {
  margin-bottom: 1.25rem;
  line-height: 1.75;
}

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

a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-light);
}

/* Container - wider for modern feel */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header - cleaner, more spacious */
.site-header {
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border-light);
  padding: 1.25rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  background-color: rgba(255, 255, 255, 0.8);
}

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.site-title {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.site-title:hover {
  text-decoration: none;
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.nav-links a {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-light);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

/* Footer - modern and minimal */
.site-footer {
  background-color: var(--color-background-subtle);
  border-top: 1px solid var(--color-border-light);
  margin-top: var(--spacing-section);
  padding: 3rem 0;
  font-size: 0.9375rem;
  color: var(--color-text-light);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.social-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.social-links a {
  color: var(--color-text-light);
  font-weight: 500;
  transition: color 0.2s ease;
}

.social-links a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

/* Main content spacing */
.site-content {
  min-height: 60vh;
  padding-top: 2rem;
  padding-bottom: 2rem;
}

/* Home Page - Astro-inspired hero */
.home-hero {
  text-align: center;
  padding: 4rem 0 5rem;
  background: linear-gradient(135deg, var(--color-background) 0%, var(--color-background-subtle) 100%);
  margin: 0 -2rem 4rem -2rem;
  border-bottom: 1px solid var(--color-border-light);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  margin-bottom: 1.25rem;
  /* Gradient text with fallback for accessibility */
  color: var(--color-text);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

/* Fallback for high contrast mode and browsers that don't support background-clip */
@media (prefers-contrast: high) {
  .hero-title {
    background: none;
    -webkit-text-fill-color: unset;
    color: var(--color-text);
  }
}

.hero-tagline {
  font-size: 1.375rem;
  font-weight: 400;
  color: var(--color-text-light);
  margin-bottom: 2.5rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

/* Buttons - modern, Astro-inspired */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  border: 2px solid transparent;
  cursor: pointer;
  letter-spacing: -0.01em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
  color: white;
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
}

.btn-secondary {
  background-color: var(--color-background);
  color: var(--color-accent);
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--color-accent-light);
  border-color: var(--color-accent);
  text-decoration: none;
}

/* Sections - generous spacing */
.home-section {
  margin-bottom: var(--spacing-section);
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
}

.home-section h2 {
  margin-top: 0;
  margin-bottom: 2rem;
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: -0.02em;
}

.section-footer {
  text-align: center;
  margin-top: 2.5rem;
  font-family: var(--font-sans);
  font-weight: 500;
}

.section-footer a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-accent);
  font-size: 1.0625rem;
  transition: transform 0.2s ease;
}

.section-footer a:hover {
  transform: translateX(4px);
}

/* Projects - modern card design */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.project-card {
  padding: 2rem;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

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

.project-card:hover::before {
  transform: scaleX(1);
}

.project-card h3 {
  margin-top: 0;
  margin-bottom: 1rem;
  font-size: 1.375rem;
  font-weight: 700;
}

.project-card h3 a {
  color: var(--color-text);
  text-decoration: none;
}

.project-card h3 a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.project-card p {
  color: var(--color-text-light);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.project-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
  margin-bottom: 1.25rem;
}

.tag {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.375rem 0.875rem;
  background-color: var(--color-accent-light);
  color: var(--color-accent-hover);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-accent);
}

.read-more {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

/* Posts List - clean and readable */
.posts-list {
  margin-bottom: 2rem;
}

.post-item {
  margin-bottom: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--color-border-light);
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
}

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

.post-item:hover {
  transform: translateX(4px);
  border-left-color: var(--color-accent);
}

.post-item h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
}

.post-item h3 a {
  color: var(--color-text);
  text-decoration: none;
}

.post-item h3 a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.post-item p {
  color: var(--color-text-light);
  line-height: 1.7;
}

.post-meta {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.language-tag {
  display: inline-block;
  padding: 0.25rem 0.625rem;
  background-color: var(--color-accent-light);
  color: var(--color-accent-hover);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Post Detail - optimized for reading */
.post-header,
.project-header {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
}

.post-title,
.project-title {
  margin-bottom: 1rem;
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
}

.post-content,
.project-content {
  margin-bottom: 3rem;
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
  font-size: 1.0625rem;
  line-height: 1.8;
}

.post-content img,
.project-content img {
  max-width: 100%;
  height: auto;
  margin: 2rem 0;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.post-content pre,
.project-content pre {
  background-color: var(--color-background-subtle);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: 0.9375rem;
  border: 1px solid var(--color-border);
  font-family: var(--font-mono);
}

.post-content code,
.project-content code {
  font-family: var(--font-mono);
  background-color: var(--color-background-subtle);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
  color: var(--color-accent-hover);
  border: 1px solid var(--color-border-light);
}

.post-content pre code,
.project-content pre code {
  background-color: transparent;
  padding: 0;
  border: none;
  color: inherit;
}



/* CV Page - professional and print-friendly */
.cv-header {
  text-align: center;
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 2px solid var(--color-border);
}

.cv-header h1 {
  font-size: 2.75rem;
  font-weight: 900;
  margin-bottom: 0.5rem;
}

.cv-header p {
  font-size: 1.125rem;
  color: var(--color-text-light);
  margin-bottom: 0.5rem;
}

.cv-section {
  margin-bottom: 3rem;
}

.cv-section h2 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-border-light);
  font-weight: 700;
}

.cv-item {
  margin-bottom: 2rem;
  padding-left: 1rem;
  border-left: 3px solid var(--color-border-light);
  transition: border-color 0.2s ease;
}

.cv-item:hover {
  border-left-color: var(--color-accent);
}

.cv-item h3 {
  font-size: 1.25rem;
  margin-bottom: 0.375rem;
  font-weight: 700;
}

.cv-item-meta {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.cv-item ul {
  margin-top: 0.75rem;
  margin-left: 1.25rem;
}

.cv-item li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

/* Print Styles for CV */
@media print {
  .site-header,
  .site-footer,
  .back-link {
    display: none;
  }
  
  body {
    font-size: 11pt;
    line-height: 1.5;
    color: #000;
  }
  
  .container {
    max-width: 100%;
    padding: 0;
  }
  
  a {
    color: #000;
    text-decoration: none;
  }
  
  .cv-item {
    page-break-inside: avoid;
  }
  
  h1, h2, h3 {
    page-break-after: avoid;
  }
}

/* Responsive Design - mobile-first approach */
@media (max-width: 768px) {
  body {
    font-size: 16px;
  }
  
  .container {
    padding: 0 1.25rem;
  }
  
  .hero-title {
    font-size: 2.25rem;
  }
  
  .hero-tagline {
    font-size: 1.125rem;
  }
  
  .home-hero {
    padding: 3rem 0 3.5rem;
    margin: 0 -1.25rem 3rem -1.25rem;
  }
  
  .site-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  
  .nav-links {
    width: 100%;
    justify-content: flex-start;
    gap: 1.25rem;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }
  
  .social-links {
    justify-content: center;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.625rem; }
  h3 { font-size: 1.25rem; }
  
  .btn {
    width: 100%;
    text-align: center;
  }
  
  .hero-cta {
    flex-direction: column;
    width: 100%;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Accessibility - improved focus states */
a:focus,
button:focus,
.btn:focus {
  outline: 3px solid var(--color-accent-light);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Skip to main content link for screen readers */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-accent);
  color: white;
  padding: 0.75rem 1.25rem;
  text-decoration: none;
  z-index: 1000;
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 600;
}

.skip-link:focus {
  top: 0;
}

/* Utility classes */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--color-text-muted);
}

/* Back link styling */
.back-link {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  margin-top: 2rem;
  display: inline-block;
}

.back-link a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-light);
  transition: all 0.2s ease;
}

.back-link a:hover {
  color: var(--color-accent);
  transform: translateX(-4px);
  text-decoration: none;
}

/* Post navigation */
.post-footer,
.project-footer {
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
}

.post-navigation {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.nav-previous,
.nav-next {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
}

/* Project detail sections */
.project-section {
  margin-bottom: 2.5rem;
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
}

.project-section h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  font-weight: 700;
  color: var(--color-text);
}