/* =========================================================
   GLOBAL — Base
   Reset, document defaults, skip link, shell utility, reveal
   primitive, and reduced-motion guard. No page-specific rules.
   ========================================================= */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  background: var(--page-bg);
}

body {
  margin: 0;
  background: var(--page-bg);
  color: var(--page-fg);
  font-family: var(--font-body);
  overflow-x: hidden;
  transition: background-color var(--duration-page-theme) var(--ease), color var(--duration-fast) linear;
}

body[data-menu-state="open"] {
  overflow: hidden;
}

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

h1,
h2,
h3 {
  font-family: var(--font-display);
  text-wrap: balance;
}

a {
  color: inherit;
  text-decoration: none;
  transition:
    color var(--hover-duration) var(--ease),
    background-color var(--hover-duration) var(--ease),
    border-color var(--hover-duration) var(--ease),
    opacity var(--hover-duration) var(--ease),
    transform var(--hover-duration) var(--ease);
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
  transition:
    color var(--hover-duration) var(--ease),
    background-color var(--hover-duration) var(--ease),
    border-color var(--hover-duration) var(--ease),
    opacity var(--hover-duration) var(--ease),
    transform var(--hover-duration) var(--ease);
}

:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 5px;
}

/* Brand lime highlight on text selection, site-wide. */
::selection {
  background: var(--pr-lime);
  color: var(--pr-ink);
}

.skip-link {
  position: fixed;
  left: var(--space-page-x);
  top: 16px;
  z-index: 999;
  transform: translateY(-160%);
  background: var(--pr-ink);
  color: var(--pr-paper);
  padding: var(--space-row-sm) var(--space-form-pad);
  border-radius: var(--radius-pill);
  transition: transform var(--duration-fast) var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

.pr-shell {
  width: var(--shell);
  margin: 0 auto;
}

/* Reveal-on-scroll primitive (main.js animates these in). */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
}

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

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}