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

@media (max-width: 768px) {
  :root {
    --font-size-body:    1.25rem;
    --font-size-body-lg: 1.375rem;
  }
}

html {
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  scrollbar-gutter: stable;
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-family-base);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-wrap: pretty;
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-md);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-blue-primary);
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

h1 { font-size: var(--font-size-hero); letter-spacing: -0.02em; color: var(--color-blue-primary); }
h2 { font-size: var(--font-size-h2); letter-spacing: -0.02em; }
h3 { font-size: var(--font-size-h3); }

p {
  margin: 0 0 var(--space-lg);
  font-size: var(--font-size-body-lg);
  line-height: var(--line-height-relaxed);
}

a {
  color: var(--color-blue-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-blue-primary);
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  padding: 0;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

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

::selection {
  background-color: var(--color-text-primary);
  color: var(--color-cta-text);
}

/* ----- Skip link ----- */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: 9999;
  padding: var(--space-xs) var(--space-lg);
  background-color: var(--color-blue-primary);
  color: #fff;
  font-weight: var(--font-weight-bold);
  font-size: 1rem;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-yellow);
  outline-offset: 2px;
}

/* ----- Screen-reader only utility ----- */

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

body.is-modal-open > .site-header,
body.is-modal-open > main,
body.is-modal-open > footer {
  filter: blur(4px);
  transition: filter var(--transition-normal);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}