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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3, h4 {
  line-height: 1.25;
  margin-top: 0;
  color: var(--color-primary-dark);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; margin-bottom: var(--space-md); }
h3 { font-size: 1.15rem; margin-bottom: var(--space-sm); }

p {
  margin-top: 0;
  margin-bottom: var(--space-md);
}

ul, ol {
  margin-top: 0;
  margin-bottom: var(--space-md);
  padding-left: 1.25rem;
}

code, pre {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

pre {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  overflow-x: auto;
  margin-bottom: var(--space-md);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.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;
}