/* Base: reset, typography, layout helpers. Uses tokens only. */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + var(--space-4)); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background .2s, color .2s;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: var(--leading-heading);
  font-weight: 700;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p { margin: 0; }
img, svg, video { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-underline-offset: 3px; }
button, input, select, textarea { font: inherit; color: inherit; }
ul, ol { margin: 0; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

[hidden] { display: none !important; }

.stack > * + * { margin-top: var(--space-4); }

.muted { color: var(--text-muted); }
.text-sm { font-size: var(--text-sm); }
.num { font-variant-numeric: tabular-nums; }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: var(--space-4); top: -100px; z-index: 100;
  background: var(--primary); color: var(--on-primary); padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm); font-weight: 700; text-decoration: none;
}
.skip-link:focus { top: var(--space-4); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}