/* ============================================================
   base.css — reset + base element styling
   ============================================================ */

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-body);
  line-height: 1.7;
  color: var(--color-ink);
  background: var(--color-bg);
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.15;
  color: var(--color-primary);
  margin: 0 0 var(--space-sm);
}

h1 { font-size: var(--step-hero); }
h2 { font-size: var(--step-h2); }
h3 { font-size: var(--step-h3); }

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

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover, a:focus-visible { color: var(--color-accent); }

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

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

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