/* ==========================================================================
   Reset & Base — Modern CSS Reset
   ========================================================================== */

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  color: var(--color-text-heading);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  font-weight: var(--font-weight-bold);
}

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

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

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

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

ul,
ol {
  list-style: none;
}

p {
  max-width: 65ch;
}

/* ── Focus Visible ─────────────────────────────────────────────────────── */
:focus-visible {
  outline: 3px solid var(--color-focus-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

:focus:not(:focus-visible) {
  outline: none;
}

/* ── Skip Link ─────────────────────────────────────────────────────────── */
.skip-link {
  position: fixed;
  top: -100%;
  left: var(--space-4);
  z-index: calc(var(--z-modal) + 1);
  padding: var(--space-3) var(--space-6);
  background: var(--color-accent);
  color: var(--color-white);
  font-weight: var(--font-weight-semi);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  transition: top var(--duration-fast) var(--ease-default);
}

.skip-link:focus {
  top: 0;
}

/* ── Reduced Motion ────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── Selection ─────────────────────────────────────────────────────────── */
::selection {
  background-color: var(--color-accent);
  color: var(--color-white);
}