/* FS base: reset, typography, page frame. overflow-x lives on html, never body (sticky nav). */
*, *::before, *::after { box-sizing: border-box; }

html {
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.25; margin: 0 0 0.5em; font-weight: 650; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.4rem, 1.1rem + 1.2vw, 1.85rem); }
h2 { font-size: 1.1rem; }
h3 { font-size: 1rem; }
p { margin: 0 0 0.75em; }

a { color: var(--accent); text-underline-offset: 2px; }
a:hover { color: var(--accent-hover); }

button, input, select, textarea { font: inherit; color: inherit; }
img, svg { display: block; max-width: 100%; }

:focus-visible { outline: none; box-shadow: var(--focus); border-radius: var(--radius-sm); }

[hidden] { display: none !important; }

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

.icon { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.icon-lg { width: 22px; height: 22px; }

.page { padding: 24px var(--gutter) 64px; max-width: 1280px; margin: 0 auto; }
section[id], [id].card { scroll-margin-top: calc(var(--bar-h) + 16px); }