/* =====================================================================
   NOCTIS v2 — base.css
   reset + base type + theme transition. No components, no layout.
   ===================================================================== */

@import "./tokens.css";

/* -------- reset (minimum, modern-targeted) --------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: var(--type-body);
  line-height: var(--lh-body);
  font-weight: 400;
  /* theme transition only on the actual coloured props, not transform */
  transition:
    background-color var(--t-theme) var(--ease-out),
    color            var(--t-theme) var(--ease-out);
}

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

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

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; margin: 0; }
p { margin: 0; }
hr { border: 0; border-top: var(--border); margin: 0; }

::selection { background: var(--accent); color: var(--bg); }

/* -------- typography classes (shared across pages) ----------------- */
.h1, h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: var(--type-h1);
  line-height: var(--lh-h1);
  letter-spacing: var(--track-h1);
  margin: 0;
  color: var(--fg);
}
.h2, h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: var(--type-h2);
  line-height: var(--lh-h2);
  letter-spacing: var(--track-h2);
  margin: 0;
  color: var(--fg);
}
.h3, h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: var(--type-h3);
  line-height: var(--lh-h3);
  letter-spacing: var(--track-h3);
  margin: 0;
  color: var(--fg);
}
.h4, h4 {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: var(--type-h4);
  line-height: 1.3;
  letter-spacing: -0.005em;
  margin: 0;
  color: var(--fg);
}

/* light theme: serif feels chunky against cream — drop weight */
:root[data-theme="light"] h1,
:root[data-theme="light"] h2,
:root[data-theme="light"] h3 {
  font-weight: 500;
}
:root[data-theme="dark"] h1 { font-weight: 500; }

/* Chinese: negative tracking would crush the glyphs together */
:lang(zh) h1, :lang(zh) h2, :lang(zh) h3, :lang(zh) .h1, :lang(zh) .h2,
[lang^="zh"] h1, [lang^="zh"] h2, [lang^="zh"] h3,
[lang^="zh"] .h1, [lang^="zh"] .h2 {
  letter-spacing: 0;
}

.lead {
  font-size: var(--type-lead);
  line-height: 1.55;
  color: var(--fg-soft);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--type-eyebrow);
  font-weight: 500;
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
  color: var(--fg-muted);
}

.meta {
  font-family: var(--font-sans);
  font-size: var(--type-eyebrow);
  font-weight: 400;
  letter-spacing: var(--track-meta);
  text-transform: uppercase;
  color: var(--fg-faint);
}

.caption {
  font-family: var(--font-sans);
  font-size: var(--type-caption);
  color: var(--fg-muted);
  line-height: 1.5;
  font-style: italic;
}

.small { font-size: var(--type-small); color: var(--fg-soft); }

/* prose — for long-form article body */
.prose {
  font-family: var(--font-sans);
  font-size: var(--type-body);
  line-height: var(--lh-prose);
  color: var(--fg-soft);
  max-width: 36rem;
}
.prose > p + p { margin-top: 2em; }
.prose > blockquote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--type-h3);
  line-height: 1.32;
  color: var(--fg);
  margin: 2.4em 0;
  padding: 0 0 0 1.2em;
  border-left: 1px solid var(--accent);
}

/* -------- focus state ---------------------------------------------- */
:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 3px;
}

/* -------- view-transition root crossfade (theme swap) -------------- */
@supports (view-transition-name: root) {
  :root { view-transition-name: root; }
  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation-duration: var(--t-theme);
    animation-timing-function: var(--ease-out);
  }
  /* don't crossfade nav (it lives above everything) */
  .nav { view-transition-name: nav; }
}