/* ============================================================
   0xmrerror.me — base: reset, typography, utilities
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 20px);
  -webkit-text-size-adjust: 100%;
  scrollbar-gutter: stable;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-lg);
  line-height: var(--lh-body);
  color: var(--text);
  background: var(--bg-0);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ── headings ───────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-hi);
  line-height: var(--lh-tight);
  font-weight: 650;
  letter-spacing: -.017em;
  text-wrap: balance;
}
h1 { font-size: var(--fs-5xl); }
h2 { font-size: var(--fs-3xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }

/* ── prose ──────────────────────────────────────────────── */
p { max-width: var(--measure); text-wrap: pretty; }
p + p { margin-top: var(--sp-4); }

strong, b { color: var(--text-hi); font-weight: 600; }
em { color: var(--text-hi); }
small { font-size: var(--fs-2xs); }

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-size: .875em;
  font-variant-ligatures: none;
}

a {
  color: var(--accent-text);
  text-decoration: none;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
a:hover { text-decoration: underline; text-decoration-color: var(--accent-line); }

ul, ol { padding-left: 1.25em; }
li { margin-block: var(--sp-2); }
li::marker { color: var(--text-faint); }

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin-block: var(--sp-10);
}

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

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

/* ── film grain ─────────────────────────────────────────────
   A fixed, pointer-transparent layer of SVG turbulence so the
   dark surfaces have texture instead of reading as flat fill.
   z-index --z-raised puts it over the page and under the nav,
   modals and toast; nothing else has to know it exists.

   It is a token because on white it is only noise: the light
   theme sets --grain-alpha to 0 rather than inheriting a value
   meant for a dark page. The SVG is desaturated by feColorMatrix
   so it grains in greyscale, not in the random hues a bare
   feTurbulence produces. */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: var(--z-raised);
  pointer-events: none;
  opacity: var(--grain-alpha);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 140px 140px;
}

/* ── theme crossfade ─────────────────────────────────────────
   js/main.js wraps theme/accent switches in
   document.startViewTransition when the API exists, the page has
   already painted, and motion is allowed. This only shortens the
   default crossfade; without the API the switch is instant, which
   is what it always was. */
@media (prefers-reduced-motion: no-preference) {
  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation-duration: var(--t-vt);
    animation-timing-function: var(--ease);
  }
}

/* ── focus ──────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent-text);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}
:focus:not(:focus-visible) { outline: none; }

/* ── scrollbar ──────────────────────────────────────────── */
* { scrollbar-width: thin; scrollbar-color: var(--line-strong) transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border: 3px solid var(--bg-0);
  border-radius: var(--r-pill);
}
::-webkit-scrollbar-thumb:hover { background: var(--accent-text); }

/* ── layout primitives ──────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
/* the CV is a document, not a page: narrower measure, and the same type
   scale as print so the screen and the PDF agree */
.container--cv { max-width: 860px; }

.skip-link {
  position: absolute;
  left: var(--sp-4);
  top: -100px;
  z-index: var(--z-toast);
  background: var(--accent);
  color: var(--accent-ink);
  padding: var(--sp-3) var(--sp-5);
  border-radius: var(--r);
  font-weight: 600;
  transition: top var(--t) var(--ease);
}
.skip-link:focus { top: var(--sp-4); text-decoration: none; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ── typography helpers ─────────────────────────────────── */
.mono { font-family: var(--font-mono); }
.dim  { color: var(--text-dim); }
.faint{ color: var(--text-faint); }
.hi   { color: var(--text-hi); }
.accent { color: var(--accent-text); }
.measure { max-width: var(--measure); }
.nowrap { white-space: nowrap; }

/* ── progressive enhancement guard ──────────────────────────
   .reveal hides content only when JS is running, so the page
   is never blank if the script fails to load.

   --reveal-delay staggers siblings that reveal together. It is
   cleared along with the reveal classes once the transition has
   run (js/main.js), so it never lingers onto a card's own hover
   transitions. */
.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
  transition-delay: var(--reveal-delay, 0s);
}
.js .reveal.is-in { opacity: 1; transform: none; }

.grid .reveal:nth-child(2) { --reveal-delay: .05s; }
.grid .reveal:nth-child(3) { --reveal-delay: .1s; }
.grid .reveal:nth-child(4) { --reveal-delay: .15s; }
.grid .reveal:nth-child(5) { --reveal-delay: .2s; }
.grid .reveal:nth-child(n+6) { --reveal-delay: .25s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .js .reveal { opacity: 1; transform: none; }
}

@media print {
  html { scroll-padding-top: 0; }
}