/* ============================================
   1. Reset
   ============================================ */
   *, *::before, *::after {
    box-sizing: border-box;
  }
  
  * {
    margin: 0;
    padding: 0;
  }
  
  img, picture {
    max-width: 100%;
    display: block;
  }
  
  /* ============================================
     2. Tokens
     ============================================ */
  :root {
    --color-bg: #fafafa;
    --color-text: #1a1a1a;
    --color-muted: #666;
    --color-accent: #2563eb;
    --color-border: #e5e5e5;
  
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    --size-base: 1.0625rem;
    --line-height: 1.6;
  
    --space-1: 0.5rem;
    --space-2: 1rem;
    --space-3: 1.5rem;
    --space-4: 1.5rem;
    --space-6: 2rem;
    --space-8: 2.5rem;
  
    --max-width: 42rem; /* ~672px, roughly 65ch */
  }
  
  /* ============================================
     3. Base
     ============================================ */
  body {
    font-family: var(--font-body);
    font-size: var(--size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background: var(--color-bg);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-4) var(--space-3);
  }
  
  h1 {
    font-size: 1.5rem;
    font-weight: 600;
  }
  
  h2 {
    font-size: 1.125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-muted);
    margin-bottom: var(--space-2);
  }
  
  h3 {
    font-size: 1.0625rem;
    font-weight: 600;
  }
  
  p {
    margin-bottom: var(--space-2);
  }
  
  a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
  }
  
  a:hover {
    text-decoration: none;
  }
  
  /* ============================================
     4. Layout
     ============================================ */
  header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-8);
  }
  
  header p {
    color: var(--color-muted);
    margin-bottom: 0;
  }
  
  nav {
    display: flex;
    gap: var(--space-2);
  }
  
  main > section {
    margin-bottom: var(--space-8);
  }
  
  section article {
    margin-bottom: var(--space-4);
  }

  section article:last-child {
    margin-bottom: 0;
  }

  .project-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1) var(--space-2);
  }
  
  time {
    color: var(--color-muted);
    font-size: 0.9375rem;
  }

  footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-8);
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-border);
    color: var(--color-muted);
    font-size: 0.9375rem;
  }
  
  footer p {
    margin: 0;
  }

  /* ============================================
     5. Post body
     ============================================ */
  .post {
    margin-bottom: var(--space-8);
  }

  .post > header {
    display: block;
    margin-bottom: var(--space-6);
  }

  .post h1 {
    font-size: 1.75rem;
    margin-bottom: var(--space-1);
  }

  .post h2 {
    text-transform: none;
    letter-spacing: normal;
    color: var(--color-text);
    font-size: 1.25rem;
    margin-top: var(--space-6);
    margin-bottom: var(--space-2);
  }

  .post h3 {
    font-size: 1.125rem;
    margin-top: var(--space-4);
    margin-bottom: var(--space-1);
  }

  .post ul,
  .post ol {
    padding-left: var(--space-3);
    margin-bottom: var(--space-2);
  }

  .post li {
    margin-bottom: var(--space-1);
  }

  .post pre {
    background: color-mix(in srgb, var(--color-text) 6%, transparent);
    padding: var(--space-2);
    border-radius: 6px;
    overflow-x: auto;
    font-size: 0.9375rem;
    line-height: 1.5;
    margin-bottom: var(--space-3);
  }

  .post code {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.9em;
    background: color-mix(in srgb, var(--color-text) 8%, transparent);
    padding: 0.1em 0.3em;
    border-radius: 3px;
  }

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

  .post blockquote {
    border-left: 3px solid var(--color-border);
    padding-left: var(--space-2);
    color: var(--color-muted);
    margin-bottom: var(--space-2);
  }

  .post figure {
    margin-bottom: var(--space-3);
  }

  .post figure img {
    max-width: 24rem;
    display: block;
    margin-inline: auto;
  }

  .post figcaption {
    color: var(--color-muted);
    font-size: 0.9375rem;
    margin-top: var(--space-1);
    text-align: center;
  }

  /* ============================================
     6. Accessibility
     ============================================ */
  .skip-link {
    position: absolute;
    inset-inline-start: -999px;
    inset-block-start: 0;
    background: var(--color-bg);
    color: var(--color-accent);
    padding: var(--space-1) var(--space-2);
  }

  .skip-link:focus {
    inset-inline-start: var(--space-2);
    inset-block-start: var(--space-2);
  }

  /* ============================================
     7. Dark mode (free)
     ============================================ */
  @media (prefers-color-scheme: dark) {
    :root {
      --color-bg: #111;
      --color-text: #eaeaea;
      --color-muted: #888;
      --color-accent: #60a5fa;
      --color-border: #2a2a2a;
    }
  }