/* =========================================================================
   base.css — reset, typography, prose elements
   ========================================================================= */

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-serif);
  line-height: var(--line-height-base);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* UI chrome (nav, buttons, labels, captions, TOC) uses the sans stack;
   only long-form prose uses the serif. */
nav, .toc, .site-footer, button, .btn, figcaption, .meta, .label,
.widget-controls, .badge {
  font-family: var(--font-sans);
}

img, svg { max-width: 100%; display: block; }

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
a:hover { color: var(--color-accent-ink); }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-ink);
  margin: var(--space-5) 0 var(--space-3);
}
h1 { font-size: 2.5rem; }
h2 { font-size: 1.6rem; border-bottom: 1px solid var(--color-border); padding-bottom: var(--space-2); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.05rem; font-style: italic; }

p { margin: 0 0 var(--space-3); }

blockquote {
  margin: var(--space-4) 0;
  padding: var(--space-2) var(--space-4);
  border-left: 3px solid var(--color-accent);
  color: var(--color-ink-muted);
  font-style: italic;
}

code, pre {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-bg-code);
  border-radius: var(--radius-sm);
}
code { padding: 0.1em 0.35em; }
pre {
  padding: var(--space-3);
  overflow-x: auto;
  border: 1px solid var(--color-border);
}
pre code { padding: 0; background: none; }

/* Add class="wrap" to any <pre> to wrap long lines instead of scrolling
   horizontally — handy for citation text, long prose-like strings, or
   anything where losing the right edge on narrow screens is worse than
   losing monospace alignment. */
pre.wrap {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  overflow-x: visible;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: var(--space-4) 0;
  font-family: var(--font-sans);
  font-size: 0.92rem;
}
th, td {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-3);
  text-align: left;
}
th { color: var(--color-ink-muted); font-weight: 600; }

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-5) 0;
}

::selection { background: var(--color-accent-soft); }

/* Skip link for keyboard/screen-reader users */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
}
.skip-link:focus {
  position: fixed;
  left: var(--space-3);
  top: var(--space-3);
  z-index: 1000;
  background: var(--color-bg);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
}