/* ============================================================
   Sansoif — Base / reset + global chrome helpers
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-text);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: inherit; text-decoration: none; }

/* Keyboard-visible focus (a11y) — never removed without a visible alternative. */
a:focus-visible,
button:focus-visible,
[role="button"]:focus-visible {
  outline: none;
  box-shadow: var(--sf-ring);
}

/* Offset in-page anchors so they clear the sticky header. */
:target { scroll-margin-top: 90px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* Visually-hidden but screen-reader-available. */
.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;
}

/* Skip-to-content link. */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
  background: var(--accent);
  color: var(--on-accent);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 700;
}

/* The site follows the system's light or dark preference (data-theme="auto" on its
   layouts, sansoif/tokens.css); native controls and scrollbars follow too. */
:root[data-theme="auto"] { color-scheme: light dark; }