:root {
  --site-max: 72rem;
  --text-max: 44rem;
  --content-max: clamp(45rem, 95vw, 52rem);
  --gutter: clamp(1rem, 3vw, 2rem);
  --section-space: 2rem;
  --header-height: clamp(4rem, 6vw, 6.5rem);
  --radius: 1rem;
  --border: 1px solid #d9d9d9;
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1f2933;
  --muted: #4f6375;
  --heading: #102a43;
  --accent: #0f766e;
  --accent-dark: #115e59;
  --focus: 3px solid rgba(15, 118, 110, 0.25);
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: linear-gradient(180deg, #eef4f7 0%, var(--bg) 28rem);
}
img {
  display: block;
  max-width: 100%;
  height: auto;
}
a {
  color: var(--accent-dark);
  text-underline-offset: 0.18em;
}
a:hover {
  text-decoration-thickness: 2px;
}
a:focus-visible,
button:focus-visible {
  outline: var(--focus);
  outline-offset: 3px;
}
h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.15;
  color: var(--heading);
}
h1 {
  font-size: clamp(1.8rem, 8vw, 2.5rem);
  max-width: 20ch;
  margin-bottom: 1rem;
}
h2 {
  font-size: clamp(1.5rem, 3.2vw, 2.4rem);
  margin-bottom: 1rem;
}
h3 {
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  margin-bottom: 0.75rem;
}
p,
li {
  font-size: clamp(1rem, 1.2vw, 1.0625rem);
}
.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--heading);
  color: #fff;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  z-index: 100;
}
.skip-link:focus {
  top: 1rem;
}
.section--alt {
  background: rgba(255, 255, 255, 0.72);
}
.hero-break {
  display: none;
}
.preview-notebreak {
  display: none;
}