/* Base — reset and baseline styles */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

/* Respect user motion preference */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Skip link — visible on focus */
.skip-link {
  position: absolute;
  top: -9999px;
  left: var(--space-sm);
  z-index: 9999;
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-accent);
  color: #ffffff;
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-sm);
}

/* Headings */
h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: var(--line-height-heading);
  font-weight: var(--font-weight-bold);
}

/* Links */
a {
  color: var(--color-accent);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--color-accent-hover);
}

/* Focus visible — global */
:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  outline-offset: var(--focus-ring-offset);
  border-radius: var(--radius-sm);
}

/* Lists */
ul,
ol {
  list-style: none;
}

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

/* Details / summary */
details > summary {
  cursor: pointer;
  font-weight: var(--font-weight-medium);
  padding: var(--space-sm) 0;
}

details > summary:focus-visible {
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
  outline: none;
}