:root {
  --color-bg:           #ffffff;
  --color-bg-subtle:    #f8f9fa;
  --color-surface:      #f1f5f9;
  --color-text:         #1e293b;
  --color-text-muted:   #64748b;
  --color-accent:       #06b6d4;
  --color-accent-light: #cffafe;
  --color-accent-dark:  #0e7490;
  --color-border:       #e2e8f0;
  --color-code-bg:      #0f172a;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --radius: 6px;
  --transition: 150ms ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-accent-dark);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-accent);
}

.tag {
  display: inline-block;
  background-color: var(--color-accent-light);
  color: var(--color-accent-dark);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.15em 0.6em;
  border-radius: 999px;
  letter-spacing: 0.03em;
}