/* Bart Lind portfolio — global styles
   Minimal, readable defaults. System font stack, ~70ch measure,
   generous whitespace, one accent color, dark-mode variant. */

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #5a5a5a;
  --color-border: #e0e0e0;
  --color-accent: #2b6cb0;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --measure: 70ch;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 2rem;
  --space-4: 4rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #14171a;
    --color-text: #e8e8e8;
    --color-text-muted: #a0a0a0;
    --color-border: #2c2f33;
    --color-accent: #6ea8dc;
  }
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light dark;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--space-4) var(--space-2);
}

h1, h2, h3, h4 {
  line-height: 1.25;
  margin-top: var(--space-4);
  margin-bottom: var(--space-2);
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

p, ul, ol {
  margin-top: 0;
  margin-bottom: var(--space-2);
}

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a:hover {
  text-decoration-thickness: 2px;
}

code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

pre {
  padding: var(--space-2);
  overflow-x: auto;
  background: var(--color-border);
  border-radius: 6px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--space-2);
  border-bottom: 1px solid var(--color-border);
}

.site-header a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
}

.site-header nav {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.site-header nav a {
  color: var(--color-text-muted);
  font-weight: 400;
}

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

footer {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--space-3) var(--space-2) var(--space-4);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-4);
}

footer a {
  color: var(--color-text-muted);
}