*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 16px/1.55 var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; border-radius: 0; }
button { cursor: pointer; }
table { border-spacing: 0; }
fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
legend { padding: 0; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
::selection { background: var(--ink); color: var(--paper); }

.h1 { font-size: clamp(40px, 6.2vw, 76px); line-height: 1.02; letter-spacing: -.035em; font-weight: 400; }
.h2 { font-size: clamp(28px, 3.4vw, 40px); line-height: 1.12; letter-spacing: -.025em; font-weight: 400; }
.h3 { font-size: 20px; line-height: 1.3; letter-spacing: -.01em; font-weight: 500; }
.lead { font-size: clamp(18px, 1.6vw, 21px); line-height: 1.45; color: var(--ink-2); }
.small { font-size: 14px; line-height: 1.5; }
.label { font-size: 11px; line-height: 1.4; font-weight: 500; letter-spacing: .09em; text-transform: uppercase; color: var(--ink-2); }
.muted { color: var(--ink-2); }
.tab { font-variant-numeric: tabular-nums; }

.wrap { width: 100%; max-width: var(--wide); margin-inline: auto; padding-inline: var(--gutter); }
.measure { max-width: var(--measure); }
.stack > * + * { margin-top: var(--s-5); }
.stack--2 > * + * { margin-top: var(--s-2); }
.stack--3 > * + * { margin-top: var(--s-3); }
.stack--4 > * + * { margin-top: var(--s-4); }
.stack--6 > * + * { margin-top: var(--s-6); }
.stack--7 > * + * { margin-top: var(--s-7); }
.rule { border: 0; border-top: 1px solid var(--line); margin: 0; }
.link { border-bottom: 1px solid var(--line-2); padding-bottom: 1px; transition: border-color var(--dur) var(--ease); }
.link:hover { border-color: var(--ink); }
/* A sentence in place of the page: the survey could not load, needs JavaScript, or the browser is too old. */
.page-note { padding-top: var(--s-7); padding-bottom: var(--s-7); }
.visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

.site-head { border-bottom: 1px solid var(--line); background: var(--paper); }
.site-head__in { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.wordmark { font-size: 17px; font-weight: 500; letter-spacing: -.01em; }
.site-nav { display: flex; align-items: center; gap: var(--s-5); font-size: 14px; }
.site-nav a:not(.btn) { position: relative; color: var(--ink-2); transition: color var(--dur) var(--ease); }
/* Small text controls take presses over an area 44 px tall, without changing how they look or where things sit. */
.site-nav a:not(.btn)::before { content: ""; position: absolute; inset: calc(50% - 22px) 0; }
.site-nav a:not(.btn):hover, .site-nav a[aria-current="page"] { color: var(--ink); }
.site-foot { border-top: 1px solid var(--line); padding-block: var(--s-6); font-size: 13px; color: var(--ink-2); }
.site-foot__in { display: flex; justify-content: space-between; gap: var(--s-5); flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: var(--control); padding: 0 var(--s-5);
  border: 1px solid var(--ink); background: transparent; color: var(--ink);
  font-size: 15px; font-weight: 500; line-height: 1; white-space: nowrap;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn--primary { background: var(--ink); color: var(--paper); }
.btn--primary:hover { background: #2b2a28; border-color: #2b2a28; }
.btn--small { height: 36px; padding: 0 var(--s-4); font-size: 14px; }
.btn--quiet {
  position: relative; height: auto; padding: 0 0 1px; border: 0; border-bottom: 1px solid var(--line-2);
  color: var(--ink-2); font-weight: 400; font-size: 14px;
}
/* The area reaches 12 px up, the space above a skip control, so it never takes a press meant for the options above. */
.btn--quiet::before { content: ""; position: absolute; inset: -12px 0 -17px; }
.btn--quiet:hover { background: transparent; color: var(--ink); border-bottom-color: var(--ink); }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .3; pointer-events: none; }

@media (max-width: 640px) {
  .site-nav { gap: var(--s-4); }
  .site-nav a.hide-small { display: none; }
}