/* Reset + element defaults. */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

h1, h2, h3, h4 { line-height: var(--lh-tight); font-weight: 650; letter-spacing: -.015em; }
/* Editorial: display levels take the serif; h3/h4 stay sans as functional subheads. */
h1, h2 { font-family: var(--font-display); font-weight: 600; letter-spacing: -.01em; }
h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }

p, li { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; }
/* Fragment jumps must clear the sticky masthead. */
h2, h3 { scroll-margin-top: 6rem; }

a { color: var(--c-accent); text-decoration-thickness: 1px; text-underline-offset: .18em; }
a:hover { color: var(--c-accent-hover); }

/* Never outline:none. Fallback for engines without :focus-visible. */
:focus { outline: 3px solid var(--c-accent-2); outline-offset: 2px; }
:focus:not(:focus-visible) { outline: none; }
:focus-visible { outline: 3px solid var(--c-accent-2); outline-offset: 2px; }

code, pre, kbd, samp { font-family: var(--font-mono); font-size: .9em; }

code {
  background: var(--c-surface-2);
  padding: .15em .4em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border);
}

pre {
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: var(--sp-4);
  overflow-x: auto;   /* wide code scrolls itself, never the page */
}
pre code { background: none; border: 0; padding: 0; }

blockquote {
  border-left: 3px solid var(--c-accent);
  padding-left: var(--sp-4);
  color: var(--c-text-mute);
  font-style: italic;
}

hr { border: 0; border-top: 1px solid var(--c-border); margin: var(--sp-8) 0; }

table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: var(--sp-2) var(--sp-3); border-bottom: 1px solid var(--c-border); }
th { font-weight: 650; }

ul, ol { padding-left: var(--sp-5); }

button { font: inherit; color: inherit; }

::selection { background: var(--c-accent); color: #fff; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}