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

html, body {
  margin: 0;
  padding: 0;
}

/* Scales the whole type system in one place. See --root-font-size in
   tokens.css for why it is a percentage rather than a px value. */
html { font-size: var(--root-font-size, 100%); }

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.15rem); font-weight: 600; }
h3 { font-size: 1.2rem; }

p { margin: 0 0 1em; color: var(--color-text-muted); }

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: clamp(2.5rem, 6vw, 5rem) 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 2.5rem;
}

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 1000;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
}