/* ==========================================================================
   base.css — Element-level resets and defaults
   Minimal, semantic defaults. No component styling lives here.
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-heading);
  color: var(--color-text-heading);
  line-height: var(--lh-heading);
}

p {
  margin: 0;
}

a {
  color: var(--color-blue);
  text-decoration: none;
  transition: color var(--transition-fast) ease;
}

a:hover {
  color: var(--color-blue-dark);
}

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

img {
  height: auto;
}

button {
  font-family: inherit;
  cursor: pointer;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* Visible focus ring on every interactive element (accessibility). */
:focus-visible {
  outline: 2.5px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Only show smooth scroll / rich motion when motion is welcome. */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

/* Screen-reader-only helper for non-visual labels. */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}