/* base.css — reset, typography defaults, layout primitives, a11y utilities
   (REDESIGN_SPEC §2.4). Colors/sizes only via var(--token). */

/* ---------- reset ---------- */

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

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  /* keep anchored sections clear of the sticky header */
  scroll-padding-top: 4.5rem;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-canvas);
  -webkit-font-smoothing: antialiased;
}

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

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

button {
  cursor: pointer;
}

/* ---------- typography ---------- */

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  color: var(--color-ink);
  letter-spacing: -0.02em;
  line-height: 1.15;
  font-weight: 700;
  text-wrap: balance;
}

p {
  overflow-wrap: break-word;
}

a {
  color: var(--color-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--color-primary-strong);
}

ul[class],
ol[class] {
  list-style: none;
  padding: 0;
}

strong {
  color: var(--color-ink);
  font-weight: 600;
}

/* ---------- layout primitives ---------- */

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--section-y);
}

/* ---------- a11y utilities ---------- */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  font-weight: 600;
  transform: translateY(-200%);
}

.skip-link:focus-visible {
  transform: none;
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- reveal-on-scroll (classes applied by site.js only, so a no-JS
   page never hides content; skipped entirely under reduced motion) ---------- */

.reveal-init {
  opacity: 0;
  transform: translateY(26px);
  filter: blur(9px);
  transition:
    opacity 0.7s var(--ease-out),
    transform 0.7s var(--ease-out),
    filter 0.7s var(--ease-out);
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform, filter;
}

.reveal-init.in-view {
  opacity: 1;
  transform: none;
  filter: none;
}

/* ---------- reduced motion ---------- */

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

  .reveal-init {
    opacity: 1;
    transform: none;
    filter: none;
  }
}

/* ---------- print ---------- */

@media print {
  .skip-link,
  .site-header,
  .nav-toggle {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  a {
    text-decoration: underline;
  }
}