/* =============================================================================
   Reset + element defaults
   ========================================================================== */

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

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1.5rem);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  font-family: var(--font);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-synthesis-weight: none;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4 {
  color: var(--ink);
  line-height: var(--lh-head);
  letter-spacing: var(--tracking-tight);
  font-weight: 700;
  text-wrap: balance;
}

h1 { font-size: var(--fs-h1); letter-spacing: var(--tracking-tighter); }
h2 { font-size: var(--fs-h2); letter-spacing: var(--tracking-tighter); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); }

p { text-wrap: pretty; }
p + p { margin-top: var(--sp-4); }

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue); opacity: .75; }

strong, b { font-weight: 700; color: var(--ink); }
.section--blue strong, .section--blue b, .hero strong, .hero b,
.site-footer strong, .site-footer b { color: inherit; }

ul, ol { padding-left: 1.25rem; }
li + li { margin-top: var(--sp-2); }

hr { border: 0; border-top: 1px solid var(--line); }

::selection { background: var(--blue); color: #fff; }

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
  border-radius: var(--r-xs);
}

/* --- layout primitives ---------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow { max-width: 880px; }

.section { padding-block: var(--section-y); }
.section--tight { padding-block: clamp(2.5rem, 4vw, 4rem); }
.section--alt { background: var(--bg-alt); }
.section--tint { background: var(--bg-alt); }

.section--blue {
  background: var(--blue);
  color: var(--on-blue);
}
.section--blue h1, .section--blue h2, .section--blue h3, .section--blue h4,
.section--blue strong { color: #fff; }

.skip-link {
  position: absolute;
  left: var(--sp-4);
  top: -100px;
  z-index: 200;
  background: var(--blue);
  color: #fff;
  padding: var(--sp-3) var(--sp-5);
  border-radius: var(--r-sm);
  font-weight: 600;
  transition: top var(--t) var(--ease);
}
.skip-link:focus { top: var(--sp-4); color: #fff; }

.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;
}

.no-scroll { overflow: hidden; }