/* ==========================================================================
   base.css — element defaults
   Sensible resets and defaults for bare HTML elements. No components here.
   ========================================================================== */

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

* { margin: 0; }

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

body {
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Headings use the display serif; body copy stays in the system sans. */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
  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 { text-wrap: pretty; }

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

ul, ol { list-style: none; padding: 0; }

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

button, input, textarea, select { font: inherit; color: inherit; }

button { cursor: pointer; background: none; border: none; padding: 0; }

strong, b { font-weight: 600; }

hr { border: none; border-top: 1px solid var(--color-line); }

/* Visible focus ring for keyboard users. */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 3px;
}

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

/* Respect users who prefer less motion. */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---- Utilities ---------------------------------------------------------- */

/* Skip link — first focusable element, hidden until focused. */
.skip-link {
  position: absolute;
  left: var(--space-sm);
  top: -5rem;
  z-index: calc(var(--z-header) + 10);
  padding: var(--space-2xs) var(--space-sm);
  background: var(--color-ink);
  color: var(--color-bg);
  border-radius: var(--radius-sm);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: var(--space-sm); }