/* =========================================================
   Base element styling — the semantic layer.
   ========================================================= */
* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: var(--weight-regular);
  font-size: var(--type-body);
  line-height: var(--leading-body);
  color: var(--text-primary);
  background: var(--surface-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: var(--weight-semibold); color: var(--text-primary); }
h1 { font-size: var(--type-display-2); line-height: var(--leading-display-2); letter-spacing: var(--tracking-display); }
h2 { font-size: var(--type-h2); line-height: 1.15; letter-spacing: var(--tracking-heading); }
h3 { font-size: var(--type-h3); line-height: var(--leading-heading); letter-spacing: var(--tracking-heading); }
h4 { font-size: var(--type-h5); line-height: 1.2; letter-spacing: var(--tracking-heading-sm); }
h5 { font-size: var(--type-h6); line-height: 1.3; letter-spacing: var(--tracking-heading-sm); }
h6 { font-size: var(--type-label); letter-spacing: var(--tracking-label); text-transform: uppercase; color: var(--text-secondary); }

/* One italic word per headline: italic, weight steps DOWN 600 -> 500 */
h1 em, h2 em, h3 em { font-style: italic; font-weight: var(--weight-medium); }

p { margin: 0 0 18px; max-width: var(--measure-body); }
p:last-child { margin-bottom: 0; }

/* Links are black with a 1px border-bottom, never text-decoration.
   With no accent color, the underline IS the affordance. */
a { color: var(--text-primary); text-decoration: none; }
a:hover { opacity: var(--hover-opacity); }

code, pre { font-family: var(--font-mono); font-size: 0.9em; }
code { background: var(--gray-3); padding: 2px 5px; }

hr { border: none; border-top: var(--border-width) solid var(--border-hairline); margin: 0; }

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