:root {
  --brand-blue: #0156e9;
  --ink: #1c1c1c;
  --paper: #ffffff;
  --soft-blue: #edf4ff;
  --border: #d6dce5;
  --muted: #525966;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 280px; }
button, input { font: inherit; }
a { color: var(--brand-blue); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--brand-blue); outline-offset: 4px; }
[hidden] { display: none !important; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link { position: absolute; left: 16px; top: -100px; z-index: 2; padding: 12px 16px; background: white; }
.skip-link:focus { top: 12px; }
.preview-notice { padding: 11px 20px; text-align: center; background: var(--soft-blue); color: #244776; font-size: 13px; line-height: 1.5; }
.page-shell { width: min(1120px, calc(100% - 80px)); margin: 0 auto; }
.site-header { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 32px 0 24px; }
.brand-logo { display: block; width: 78px; height: auto; object-fit: contain; }
.header-purpose { margin: 0; color: var(--muted); font-size: 14px; }

.entry-layout { display: grid; grid-template-columns: 1fr 1fr; align-items: start; gap: clamp(44px, 7vw, 100px); padding: 38px 0 66px; }
.introduction h1 { font-size: clamp(40px, 4.7vw, 58px); line-height: 1.06; letter-spacing: -2px; margin: 0 0 26px; font-weight: 700; }
.intro-copy { max-width: 44ch; margin: 0 0 36px; color: var(--muted); font-size: 18px; line-height: 1.65; }
.research-notice { padding-left: 20px; border-left: 3px solid var(--brand-blue); }
.research-notice h2 { font-size: 18px; line-height: 1.4; margin: 0 0 8px; font-weight: 600; }
.research-notice p { margin: 0; max-width: 44ch; font-size: 16px; line-height: 1.65; color: var(--muted); }
.disclosure { max-width: 56ch; font-size: 13px; line-height: 1.65; color: var(--muted); margin: 28px 0 0; }

.eligibility-panel { padding-top: 4px; scroll-margin-top: 24px; }
.eligibility-panel > h2 { margin: 0 0 10px; font-size: 24px; letter-spacing: -.5px; line-height: 1.3; }
.panel-intro { margin: 0 0 28px; color: var(--muted); line-height: 1.6; font-size: 15px; }
fieldset { margin: 0; padding: 0; border: 0; display: grid; gap: 14px; }
.eligibility-choice { display: flex; align-items: flex-start; gap: 15px; padding: 22px 20px; border: 1px solid var(--border); border-radius: 8px; line-height: 1.6; font-size: 16px; cursor: pointer; }
.eligibility-choice:has(input:checked) { border-color: var(--brand-blue); background: var(--soft-blue); }
.eligibility-choice:has(input:focus-visible) { outline: 3px solid var(--brand-blue); outline-offset: 3px; }
.eligibility-choice input { flex: 0 0 auto; width: 20px; height: 20px; margin: 3px 0 0; accent-color: var(--brand-blue); cursor: pointer; }
.eligibility-choice input:focus-visible { outline: none; }
.selection-hint { margin: 18px 0 16px; color: var(--muted); font-size: 13px; line-height: 1.5; min-height: 20px; }
.continue-button { display: block; width: 100%; border: 1px solid var(--brand-blue); border-radius: 6px; background: var(--brand-blue); color: white; padding: 17px 18px; min-height: 56px; font-size: 16px; line-height: 1.4; font-weight: 600; cursor: pointer; }
.continue-button:hover:not(:disabled) { background: #0046c0; border-color: #0046c0; }
.continue-button:disabled { cursor: not-allowed; background: #dde3eb; border-color: #dde3eb; color: #596273; }
.acknowledgment { margin: 20px 0 0; font-size: 13px; line-height: 1.7; color: var(--muted); }
.verification-status { margin-top: 20px; padding: 18px; border-left: 3px solid var(--brand-blue); background: var(--soft-blue); }
.verification-status h3 { margin: 0 0 6px; font-size: 16px; line-height: 1.4; }
.verification-status p { margin: 0; font-size: 14px; line-height: 1.65; color: var(--muted); }
.noscript-message { margin-top: 20px; padding: 16px; border: 1px solid var(--border); font-size: 14px; line-height: 1.6; }

.site-footer { display: flex; justify-content: space-between; align-items: flex-start; gap: 28px; border-top: 1px solid var(--border); padding: 25px 0 32px; }
.site-footer p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; white-space: nowrap; }
.site-footer nav { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 12px 22px; }
.site-footer a { font-size: 13px; line-height: 1.65; color: var(--muted); }

@media (max-width: 760px) {
  .page-shell { width: calc(100% - 48px); max-width: 540px; }
  .site-header { padding: 26px 0 18px; }
  .brand-logo { width: 68px; }
  .entry-layout { grid-template-columns: 1fr; gap: 38px; padding: 26px 0 44px; }
  .desktop-break { display: none; }
  .introduction h1 { font-size: 43px; letter-spacing: -1.5px; margin-bottom: 20px; }
  .intro-copy { margin-bottom: 24px; font-size: 17px; }
  .disclosure { margin-top: 20px; }
  .eligibility-panel { padding-top: 0; }
  .panel-intro { margin-bottom: 20px; }
  .site-footer { flex-direction: column; gap: 15px; }
  .site-footer nav { justify-content: flex-start; gap: 12px 20px; }
}

@media (max-width: 360px) {
  .preview-notice { font-size: 12px; padding: 10px 15px; }
  .page-shell { width: calc(100% - 36px); }
  .introduction h1 { font-size: 36px; letter-spacing: -1px; }
  .header-purpose { font-size: 12px; }
  .eligibility-choice { gap: 12px; padding: 18px 15px; font-size: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}