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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  color: var(--color-text);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(196, 163, 90, 0.14), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(11, 61, 46, 0.08), transparent 50%),
    linear-gradient(180deg, var(--color-bg) 0%, #f3efe6 40%, var(--color-bg) 100%);
  min-height: 100vh;
}

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

/* Header logo must not inherit global img height:auto */
img.brand__mark {
  width: 94px;
  height: 94px;
  max-width: none;
}

a {
  color: var(--color-primary-light);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-accent);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--lh-tight);
  color: var(--color-primary);
  margin: 0 0 var(--space-4);
}

h1 { font-size: var(--fs-2xl); }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-lg); letter-spacing: 0.01em; }
h4 { font-size: var(--fs-md); font-family: var(--font-sans); font-weight: 700; }

p {
  margin: 0 0 var(--space-4);
  color: var(--color-text-muted);
}

ul, ol {
  margin: 0 0 var(--space-4);
  padding-left: 1.25rem;
  color: var(--color-text-muted);
}

li + li {
  margin-top: var(--space-2);
}

strong {
  color: var(--color-text);
  font-weight: 600;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100px;
  z-index: 1000;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  top: var(--space-4);
}

/* Sticky header offset for in-page anchors */
:target,
#verify,
#process,
#efficacy-eval {
  scroll-margin-top: calc(var(--header-h) + 1rem);
}