/* ==========================================================================
   base.css — reset, document defaults and accessibility primitives.
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  /* Reserves the scrollbar gutter so the fluid --gutter math (which uses
     100vw) does not shift the layout by ~8px between pages. */
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  /* Guards every breakpoint against accidental horizontal scroll. */
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 400;
  line-height: var(--lh-tight);
  text-wrap: balance;
}

p {
  margin: 0;
}

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

img {
  height: auto;
}

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

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

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

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

/* --- Accessibility ------------------------------------------------------- */

:focus-visible {
  outline: 3px solid var(--royal-300);
  outline-offset: 3px;
  border-radius: 2px;
}

.visually-hidden:not(:focus):not(:active) {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: 0;
  left: 50%;
  z-index: 200;
  padding: 0.75rem 1.5rem;
  background: var(--navy);
  color: var(--white);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  transform: translate(-50%, -120%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus {
  transform: translate(-50%, 0);
}

/* --- 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;
    scroll-behavior: auto !important;
  }
}