:root {
  /* Taken from the IDG Architects logo SVG (see BRAND_RESEARCH.md). */
  --ink: #373a36;
  --grey: #898a8d;
  --green: #76bc21;
  --green-deep: #4a8b2c;
  --green-text: #3f7a24; /* darker green for text/buttons: 5.2:1 on white */
  --muted: #5b5d59;
  --line: #dcdcd8;
  --bg: #ffffff;
  --handle: 56px;
  --pad: clamp(1.25rem, 5vw, 4.5rem);
  --font: "Proxima Nova", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  font: 400 1rem/1.5 var(--font);
}
a { color: inherit; text-underline-offset: 3px; }
a:hover { color: var(--green-text); }
:focus-visible { outline: 3px solid var(--green-deep); outline-offset: 3px; }

.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: #fff; padding: .6rem 1rem; z-index: 10; }
.skip:focus { left: 0; }

/* Header */
.site-header {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem 2rem; flex-wrap: wrap;
  padding: 1.25rem var(--pad);
  border-bottom: 1px solid var(--line);
}
.logo img { display: block; width: clamp(104px, 14vw, 140px); height: auto; }
.site-header ul { display: flex; gap: .25rem 1.75rem; list-style: none; margin: 0; padding: 0; flex-wrap: wrap; }
.site-header nav a { text-decoration: none; font-size: .9375rem; font-weight: 600; letter-spacing: .02em; padding: .5rem 0; display: inline-block; }
.site-header nav a:hover { text-decoration: underline; text-decoration-color: var(--green); text-decoration-thickness: 2px; }

/* Stage */
.stage {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 6rem);
  padding: clamp(2rem, 7vh, 5rem) var(--pad);
  align-content: start;
}
.intro { max-width: 40rem; }
.eyebrow {
  margin: 0 0 1rem; display: flex; align-items: center; gap: .75rem;
  color: var(--green-text); font-weight: 700; font-size: .8125rem; letter-spacing: .12em; text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 2.5rem; height: 3px; background: var(--green); flex: none; }
h1 { margin: 0; font-weight: 300; font-size: clamp(2rem, 5.2vw, 3.5rem); line-height: 1.08; letter-spacing: -.01em; }
.lede { margin: 1rem 0 1.75rem; color: var(--muted); font-size: 1.0625rem; }

/* Gate */
.gate { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .75rem; align-items: stretch; max-width: 36rem; }
.slider { min-width: 0; }
.track {
  position: relative; height: var(--handle); border: 1px solid var(--grey); background: #f4f4f1;
  overflow: hidden; user-select: none; -webkit-user-select: none;
}
.fill { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--green); opacity: .35; pointer-events: none; }
.slider-label {
  position: absolute; inset: 0; display: grid; place-items: center; padding-left: var(--handle);
  font-weight: 600; letter-spacing: .04em; color: var(--muted); pointer-events: none; font-size: .9375rem; text-align: center;
}
.handle {
  position: absolute; top: 0; left: 0; width: var(--handle); height: var(--handle);
  display: grid; place-items: center; background: var(--green); color: var(--ink);
  cursor: grab; touch-action: none; transform: translateX(var(--x, 0px));
}
.handle:active { cursor: grabbing; }
.handle:focus-visible { outline-offset: -4px; outline-color: var(--ink); }
.slider[data-state="loading"] .handle,
.slider[data-state="checking"] .handle,
.slider[data-state="blocked"] .handle { cursor: not-allowed; background: #c9cbc6; }
.slider[data-state="done"] .handle { background: var(--green-deep); color: #fff; cursor: default; }
.slider[data-state="done"] .fill { opacity: .55; }
.slider[data-state="done"] .slider-label { color: var(--ink); }
.slider.is-returning .handle, .slider.is-returning .fill { transition: transform .25s ease, width .25s ease; }

.proceed {
  font: inherit; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; font-size: .875rem;
  min-height: var(--handle); padding: 0 1.75rem; border: 2px solid var(--green-text);
  background: var(--green-text); color: #fff; cursor: pointer;
}
.proceed:hover:not(:disabled) { background: var(--ink); border-color: var(--ink); }
.proceed:disabled { background: transparent; color: var(--muted); border-color: var(--line); cursor: not-allowed; }

.status { min-height: 1.5rem; margin: 1rem 0 0; color: var(--muted); max-width: 36rem; }
.status.is-error { color: #9b1c12; font-weight: 600; }
.status.is-ok { color: var(--green-text); font-weight: 600; }
.retry {
  font: inherit; font-weight: 600; background: none; border: 0; border-bottom: 2px solid var(--green);
  padding: .5rem 0; cursor: pointer; color: var(--ink);
}
.retry[hidden] { display: none; }

/* Work index */
.index { align-self: start; border-top: 3px solid var(--ink); padding-top: 1rem; }
.index h2 { margin: 0 0 .5rem; font-size: .8125rem; letter-spacing: .12em; text-transform: uppercase; font-weight: 700; color: var(--muted); }
.index ol { list-style: none; margin: 0; padding: 0; }
.index li + li { border-top: 1px solid var(--line); }
.index a { display: flex; gap: 1rem; align-items: baseline; padding: .85rem 0; text-decoration: none; font-size: 1.25rem; font-weight: 300; }
.index a:hover { color: var(--green-text); }
.index .n { font-size: .8125rem; font-weight: 700; color: var(--grey); letter-spacing: .08em; min-width: 1.5rem; }

/* Footer */
.site-footer {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(13rem, 100%), 1fr)); gap: 1.5rem 2rem;
  padding: 2rem var(--pad) 2.5rem; border-top: 1px solid var(--line); background: #f4f4f1; font-size: .9375rem;
}
.site-footer p { margin: 0 0 .5rem; }
.site-footer .label { font-weight: 700; letter-spacing: .1em; text-transform: uppercase; font-size: .75rem; color: var(--muted); }
.site-footer .social { display: flex; gap: 1rem; flex-wrap: wrap; }

@media (max-width: 52rem) {
  .stage { grid-template-columns: minmax(0, 1fr); padding-top: 1.75rem; gap: 2.5rem; }
}
@media (max-width: 30rem) {
  .gate { grid-template-columns: minmax(0, 1fr); }
  .proceed { width: 100%; }
  .eyebrow::before { display: none; }
  .site-header { padding-block: .75rem; }
  .site-header ul { gap: 0 1.25rem; }
}
h1, .eyebrow, .lede, .status, .site-footer p, .index a { overflow-wrap: anywhere; }
@media (max-height: 40rem) and (min-width: 52rem) {
  .stage { padding-top: 1.5rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}
@media (forced-colors: active) {
  .handle, .proceed { border: 2px solid ButtonText; }
}