/* CSS Custom Properties for better maintainability */
:root {
  --color-primary: #4078c0;
  --color-text: #333;
  --color-text-muted: #808080;
  --color-bg: #fff;
  --color-code-bg: #f5f7f9;
  --color-border: #69c;
  --color-border-light: #e1e4e8;
  --color-shadow: rgba(0, 0, 0, 0.1);

  --font-primary: 'Optima', 'Geneva', 'Helvetica Neue', 'Helvetica', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  --font-secondary: 'Helvetica Neue', 'Helvetica', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  --font-mono: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', 'source-code-pro', monospace;
  
  --font-header: 'Cormorant Garamond', 'Adobe Garamond Pro', 'Garamond', 'Times New Roman', serif;
  
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  
  --container-max-width: 900px;
  --border-radius: 4px;
  --transition: all 0.3s ease;
}

/* Modern CSS Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  line-height: 1.4;
  font-family: var(--font-primary);
  color: var(--color-text);
  background-color: var(--color-bg);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Improved focus management for accessibility */
:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* Header improvements */
#header {
  text-align: center;
  font-size: 0.8em;
  letter-spacing: 0.4em;
  padding: var(--space-md) 0 var(--space-sm) 0;
}

#header h1 {
  font-family: var(--font-header);
  font-weight: 500;
  font-size: clamp(2rem, 5.5vw, 3.4rem);
  letter-spacing: 0.02em;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
  text-rendering: optimizeLegibility;
  margin: 0;
  line-height: 1.2;
  color: var(--color-text);
  transition: var(--transition);
}

#header h1 a {
  color: inherit;
  text-decoration: none;
  display: inline-block;
  transition: var(--transition);
}

#header h1 a:hover,
#header h1 a:focus {
  transform: translateY(-1px);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  color: var(--color-primary);
}

/* Navigation */
nav[role="navigation"] {
  text-align: center;
  padding: var(--space-sm) 0 var(--space-md) 0;
  letter-spacing: 0.15em;
  font-family: var(--font-secondary);
  font-size: 0.95rem;
}

nav[role="navigation"] a {
  color: var(--color-text);
  text-decoration: none;
  padding: var(--space-xs) var(--space-sm);
  transition: var(--transition);
}

nav[role="navigation"] a:hover,
nav[role="navigation"] a:focus {
  color: var(--color-primary);
}

nav[role="navigation"] a + a {
  margin-left: var(--space-xs);
  padding-left: var(--space-md);
}

/* Typography improvements */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: 600;
  line-height: 1.3;
  margin-top: 0;
  margin-bottom: var(--space-md);
}

h1 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h2 {
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

h3, h4 {
  margin: var(--space-lg) 0 var(--space-md) 0;
}

/* Modern link styling with better accessibility */
a {
  text-decoration: none;
  color: var(--color-primary);
  transition: var(--transition);
  border-radius: var(--border-radius);
}

a:hover,
a:focus {
  text-decoration: none;
  background-color: rgba(64, 120, 192, 0.1);
}

/* Improved paragraph styling */
p {
  font-family: var(--font-primary);
  font-size: clamp(16px, 2.5vw, 17px);
  text-align: justify;
  margin-bottom: var(--space-md);
  line-height: 1.5;
}

/* Modern code styling */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: var(--space-xs) var(--space-sm);
  vertical-align: baseline;
  border-radius: var(--border-radius);
  background-color: var(--color-code-bg);
  border: 1px solid var(--color-border-light);
}

pre {
  background-color: var(--color-code-bg);
  padding: var(--space-lg);
  border-left: 3px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow-x: auto;
  margin: var(--space-lg) 0;
  font-size: 0.875em;
  line-height: 1.5;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
}

/* Improved image styling */
img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--border-radius);
  box-shadow: 0 4px 8px var(--color-shadow);
  transition: var(--transition);
}

img:hover {
  box-shadow: 0 8px 16px var(--color-shadow);
}

/* Modern time element styling */
time {
  font-family: var(--font-secondary);
  font-size: 0.75rem;
  font-style: italic;
  color: var(--color-text-muted);
  display: inline-block;
}

/* Homepage two-column layout */
.content-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.content-grid .left {
  flex: 1 1 55%;
  min-width: 300px;
}

.content-grid .right {
  flex: 0 1 35%;
  min-width: 200px;
}

/* Improved byline styling */
.byline {
  font-size: 0.875rem;
  text-align: center;
  margin: var(--space-sm) 0;
  color: var(--color-text-muted);
}

.related_post {
  font-size: 0.875rem;
  margin-bottom: var(--space-sm);
}

/* Container improvements */
#container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#dates {
  line-height: 1.2;
  border-bottom: none;
  font-size: clamp(18px, 3vw, 20px);
  margin: var(--space-md) 0;
}

/* Modern section styling */
section {
  flex: 1;
  padding: var(--space-sm) 0;
}

/* Improved content width for readability */
.new-left {
  margin: 0 auto;
  width: 100%;
  max-width: 70%;
  padding: 0 var(--space-md);
}

@media (max-width: 768px) {
  .new-left {
    max-width: 100%;
    padding: 0;
  }
}

/* Figure and image container improvements */
figure {
  margin: var(--space-lg) 0;
  text-align: center;
}

figure img {
  width: 100%;
  margin: 0 auto;
}

figcaption {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: var(--space-sm);
}

/* Accessibility improvements */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Print styles */
@media print {
  * {
    background: transparent !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
  
  a,
  a:visited {
    text-decoration: underline;
  }
  
  img {
    max-width: 100% !important;
    page-break-inside: avoid;
  }
  
  h2,
  h3 {
    page-break-after: avoid;
  }
}

/* Post-specific styling */
.post-header {
  margin-bottom: var(--space-md);
  text-align: center;
  letter-spacing: normal;
}

.post-content {
  margin-top: var(--space-lg);
}

.post-content h2 {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
}

/* Content section improvements */
.content-section {
  min-height: 50vh;
}

.sr-only:focus {
  position: static;
  width: auto;
  height: auto;
  padding: var(--space-sm);
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
  background-color: var(--color-primary);
  color: white;
  text-decoration: none;
  border-radius: var(--border-radius);
  z-index: 1000;
}

/* Blockquote styling */
blockquote {
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  border-left: 3px solid var(--color-primary);
  background-color: rgba(64, 120, 192, 0.05);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  font-style: italic;
}

blockquote p {
  margin-bottom: 0;
}

/* List improvements */
ul, ol {
  margin: var(--space-md) 0;
  padding-left: var(--space-xl);
}

li {
  margin-bottom: var(--space-xs);
  line-height: 1.4;
}

/* Selection styling */
::selection {
  background-color: rgba(64, 120, 192, 0.2);
  color: var(--color-text);
}

/* Footer */
footer[role="contentinfo"] {
  text-align: center;
  padding: var(--space-xl) 0 var(--space-md) 0;
  margin-top: var(--space-xl);
  border-top: 1px solid var(--color-border-light);
  font-family: var(--font-secondary);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

footer[role="contentinfo"] p {
  margin: 0;
  text-align: center;
}

/* Callout for position statement */
.callout {
  background-color: rgba(64, 120, 192, 0.06);
  border-left: 3px solid var(--color-primary);
  padding: var(--space-sm) var(--space-md);
  margin: var(--space-md) 0;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}