:root {
  color-scheme: light;
  --paper: #f4f2ec;
  --ink: #171b1d;
  --muted: #3d4549;
  --blue: #0754e5;
  --header-height: 6.18vw;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--paper);
  color: var(--ink);
}

* { box-sizing: border-box; }
body { margin: 0; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; color: inherit; cursor: pointer; }
a { color: inherit; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--blue); outline-offset: 6px; }
button { border: 0; background: none; }
p, h1, h2 { margin: 0; }
.page { position: relative; min-height: 100svh; overflow: clip; }
.skip-link { position: fixed; top: 12px; left: 12px; padding: 12px 18px; background: var(--paper); z-index: 20; transform: translateY(-200%); }
.skip-link:focus { transform: translateY(0); }

.masthead {
  position: relative;
  z-index: 3;
  height: var(--header-height);
  padding-inline: 4.45%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgb(23 27 29 / 70%);
  background: var(--paper);
}
.brand { display: inline-flex; align-items: center; gap: .48vw; text-decoration: none; }
.brand-mark { width: 2.5vw; height: 2.5vw; color: var(--blue); }
.brand-name { font-size: .88vw; font-weight: 800; letter-spacing: .035em; line-height: .98; text-transform: uppercase; }
.masthead-descriptor { position: absolute; left: 45.2%; transform: translateX(-50%); font-size: .70vw; letter-spacing: .12em; text-transform: uppercase; white-space: nowrap; }
.navigation { display: flex; align-items: center; gap: 1.65vw; }
.navigation button { padding: 12px 0; font-size: .70vw; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.navigation button:hover { color: var(--blue); }
.nav-arrow { width: 13px; height: 13px; vertical-align: -.12em; }
.menu-toggle { display: none; }
.menu-backdrop { display: none; }

/* Coordinates follow the user's 1585 × 992 signal-lines reference. */
.hero { position: relative; min-height: 56.37vw; }
.visual-stage { position: absolute; inset: calc(-1 * var(--header-height)) 0 auto; width: 100%; z-index: 0; pointer-events: none; }
.hero-picture { display: block; width: 100%; }
.hero-art { display: block; width: 100%; height: auto; }
.hero-copy { position: relative; z-index: 1; margin-left: 59.9%; padding-top: 2.6vw; width: 34.8%; }
.eyebrow { color: var(--blue); font-size: .76vw; font-weight: 700; letter-spacing: .14em; line-height: 1.25; text-transform: uppercase; }
h1 { margin-top: 1.5vw; font-family: Georgia, 'Times New Roman', serif; font-size: 3.2vw; font-weight: 400; line-height: 1.02; letter-spacing: -.055em; }
h1 > span { display: block; }
.accent { color: var(--blue); }
.introduction { margin-top: 1vw; color: var(--muted); font-size: 1.065vw; line-height: 1.42; max-width: 34.6vw; }
.signal-caption { position: absolute; left: 89%; top: 33.5vw; font-size: .7vw; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; }

dialog { color: var(--ink); background: var(--paper); border: 1px solid var(--ink); max-width: 540px; width: calc(100% - 40px); max-height: calc(100svh - 48px); padding: 48px 40px 40px; box-shadow: 8px 8px 0 var(--blue); }
dialog::backdrop { background: rgb(20 28 39 / 35%); backdrop-filter: blur(5px); }
dialog .eyebrow { font-size: 11px; }
dialog h2 { margin: 20px 0; font: 400 36px/1.08 Georgia, serif; letter-spacing: -.04em; }
dialog p:not(.eyebrow) { color: var(--muted); font-size: 16px; line-height: 1.6; }
dialog p + p { margin-top: 16px; }
.dialog-close { position: absolute; top: 10px; right: 14px; min-width: 40px; min-height: 40px; font-size: 28px; }
.dialog-close:hover { color: var(--blue); }
.availability { padding-top: 20px; border-top: 1px solid #c9c9c3; }
.methodology-list { padding-left: 22px; margin: 0; }
.methodology-list li { padding: 10px 0 10px 8px; }
.methodology-list li::marker { color: var(--blue); }
.methodology-list strong { display: block; margin-bottom: 4px; }

@media (max-width: 1000px) {
  :root { --header-height: 80px; }
  .masthead { padding-inline: 24px; }
  .brand { gap: 7px; }
  .brand-mark { width: 36px; height: 36px; }
  .brand-name { font-size: 12px; }
  .masthead-descriptor { display: none; }
  .navigation { gap: 24px; }
  .navigation button { font-size: 11px; }
  .hero { display: flex; flex-direction: column; min-height: calc(100svh - 80px); padding: 46px 0 48px; }
  .hero-copy { margin: 0 7%; padding: 0; width: auto; }
  .eyebrow { font-size: 11px; }
  h1 { margin-top: 24px; font-size: clamp(38px, 6.9vw, 66px); line-height: 1.03; letter-spacing: -.055em; }
  .introduction { max-width: 550px; font-size: 16px; line-height: 1.5; margin-top: 22px; }
  .visual-stage { order: 1; position: relative; inset: auto; width: 100%; height: 52vw; margin-top: 30px; overflow: hidden; }
  .hero-art { position: absolute; width: 130%; max-width: none; left: -30%; top: -9vw; }
  .signal-caption { order: 2; position: relative; left: auto; top: auto; align-self: flex-end; margin: -7vw 8% 0 0; font-size: 10px; }
}

@media (max-width: 560px) {
  .masthead { padding-inline: 20px; }
  body.menu-open { overflow: hidden; }
  .menu-toggle { display: inline-flex; position: relative; z-index: 6; align-items: center; gap: 12px; min-height: 44px; padding: 12px 0 12px 12px; font-size: 12px; font-weight: 700; letter-spacing: .10em; text-transform: uppercase; }
  .menu-icon { display: block; position: relative; width: 18px; height: 18px; }
  .menu-icon::before, .menu-icon::after { content: ''; position: absolute; left: 0; width: 18px; height: 1.5px; background: currentColor; transition: transform .3s ease, top .3s ease; }
  .menu-icon::before { top: 5px; }
  .menu-icon::after { top: 12px; }
  .menu-toggle[aria-expanded="true"] .menu-icon::before { top: 8px; transform: rotate(45deg); }
  .menu-toggle[aria-expanded="true"] .menu-icon::after { top: 8px; transform: rotate(-45deg); }
  .menu-backdrop { display: block; position: fixed; inset: 0; z-index: 4; background: rgb(23 27 29 / 45%); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .32s ease, visibility .32s; }
  .menu-backdrop.is-open { opacity: 1; visibility: visible; pointer-events: auto; }
  .navigation { display: flex; position: fixed; top: 0; right: 0; bottom: 0; left: auto; z-index: 5; width: min(86vw, 360px); height: 100dvh; padding: calc(104px + env(safe-area-inset-top)) 28px max(28px, env(safe-area-inset-bottom)); background: var(--paper); border-left: 1px solid var(--ink); box-shadow: -12px 0 32px rgb(23 27 29 / 12%); flex-direction: column; align-items: stretch; justify-content: flex-start; gap: 0; overflow-y: auto; visibility: hidden; transform: translateX(100%); transition: transform .32s cubic-bezier(.22, 1, .36, 1), visibility .32s; }
  .navigation.is-open { visibility: visible; transform: translateX(0); }
  .navigation button { display: flex; align-items: center; justify-content: space-between; min-height: 64px; padding: 12px 0; border-bottom: 1px solid rgb(23 27 29 / 22%); font-size: 16px; text-align: left; }
  .nav-arrow { width: 16px; height: 16px; }
  .hero-copy { margin-inline: 24px; }
  h1 { font-size: clamp(33px, 9.65vw, 52px); }
  .visual-stage { height: 64vw; }
  .signal-caption { margin-top: -19vw; }
  dialog { padding: 44px 26px 28px; }
  dialog h2 { font-size: 32px; }
}

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