:root {
  --bg: #000000;
  --surface: #141414;
  --text: #ffffff;
  --muted: #9e9e9e;
  --faint: #5c5c5c;
  --hairline: #2e2e2e;
  --accent: #c6ff3a;
  --blue: #5c9dff;
  --pad: 20px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  font-size: 17px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img { display: block; max-width: 100%; }

.wrap { max-width: 1280px; margin: 0 auto; padding: 0 var(--pad); }

/* Header */
.header .wrap { padding-top: 18px; padding-bottom: 18px; }
.wordmark { font-size: 20px; font-weight: 700; letter-spacing: -0.3px; text-decoration: none; }

/* Type */
h1 {
  font-size: 40px;
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -1.2px;
}
h2 {
  font-size: 28px;
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.6px;
}
h1, h2 { text-wrap: balance; }
.lead { color: var(--muted); }
.eyebrow {
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* Button */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  height: 54px;
  padding: 0 28px;
  border-radius: 12px;
  background: var(--accent);
  color: #000;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
}
.button svg { width: 18px; height: 18px; flex: none; }
.button:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }

/* Sections */
.section { padding: 48px 0; }
.section--surface { background: var(--surface); }

.hero .wrap { display: grid; gap: 20px; padding-top: 24px; padding-bottom: 48px; }
.hero .cta { padding-top: 8px; }

.familiar h2 { margin-bottom: 24px; }
.familiar ul { list-style: none; display: grid; gap: 20px; }
.familiar li { border-left: 2px solid var(--blue); padding: 2px 0 2px 14px; line-height: 1.45; }

.concepts .eyebrow { margin-bottom: 20px; }
.strip {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: var(--pad);
  margin: 0 calc(-1 * var(--pad));
  padding: 0 var(--pad) 4px;
  scrollbar-width: none;
}
.strip::-webkit-scrollbar { display: none; }
.strip figure { flex: 0 0 240px; scroll-snap-align: start; }
.strip img {
  width: 100%;
  height: auto;
  aspect-ratio: 347 / 385;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid var(--hairline);
}
.strip figcaption { color: var(--muted); font-size: 13px; font-weight: 500; margin-top: 10px; }
.concepts .caption { color: var(--muted); font-size: 13px; margin-top: 20px; }

.founder .byline { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; }
.founder .byline img { width: 64px; height: 64px; border-radius: 50%; }
.founder .name { font-weight: 600; font-size: 16px; line-height: 1.3; }
.founder .role { color: var(--muted); font-size: 14px; }
.founder .note { display: grid; gap: 20px; font-size: 17px; line-height: 1.6; }

.call .wrap { display: grid; gap: 14px; }
.call .cta { padding-top: 10px; }

/* Footer */
.footer { border-top: 1px solid var(--hairline); }
.footer .wrap { display: grid; gap: 16px; padding-top: 32px; padding-bottom: 40px; font-size: 13px; }
.footer .disclaimer { color: var(--muted); }
.footer .row { display: flex; justify-content: space-between; }
.footer .brand { font-weight: 700; }
.footer .row a { color: var(--muted); text-decoration: none; }
.footer .row a:hover { color: var(--text); }

/* /call */
.intro .wrap { display: grid; gap: 16px; padding-top: 24px; padding-bottom: 32px; }
.survey .wrap { padding-bottom: 48px; }
.survey-card { background: var(--surface); border-radius: 16px; padding: 12px 8px; min-height: 420px; }
.survey-card iframe { display: block; width: 100%; border: 0; }
.done { display: none; }
.is-done .done { display: block; }
.is-done .not-done { display: none; }

/* /privacy */
.prose .wrap { max-width: calc(760px + 2 * var(--pad)); padding-top: 24px; padding-bottom: 56px; display: grid; gap: 16px; }
.prose h2 { font-size: 20px; letter-spacing: -0.2px; margin-top: 16px; }
.prose p, .prose li { color: #d6d6d6; }
.prose ul { padding-left: 20px; display: grid; gap: 6px; }
.prose .updated { color: var(--muted); font-size: 14px; }

/* Desktop */
@media (min-width: 900px) {
  :root { --pad: 80px; }

  .header .wrap { padding-top: 28px; padding-bottom: 28px; }
  .wordmark { font-size: 22px; }

  h1 { font-size: 64px; letter-spacing: -1.8px; }
  h2 { font-size: 40px; letter-spacing: -1px; }
  .eyebrow { font-size: 13px; }

  .button { width: auto; }

  .section { padding: 96px 0; }

  .hero .wrap { gap: 24px; padding-top: 96px; padding-bottom: 120px; max-width: 1280px; }
  .hero h1 { max-width: 820px; }
  .hero .lead { font-size: 20px; max-width: 680px; }

  .familiar h2 { margin-bottom: 40px; }
  .familiar ul { grid-template-columns: repeat(3, 1fr); gap: 40px; }
  .familiar li { border-left: 0; border-top: 2px solid var(--blue); padding: 24px 0 0; font-size: 18px; }

  .concepts { padding-bottom: 104px; }
  .concepts .eyebrow { margin-bottom: 24px; }
  .strip { margin: 0; padding: 0; gap: 40px; overflow: visible; }
  .strip figure { flex: 1 1 0; }
  .strip img { border-radius: 16px; }
  .strip figcaption { font-size: 14px; margin-top: 12px; }
  .concepts .caption { margin-top: 24px; }

  .founder .wrap { display: grid; grid-template-columns: 280px minmax(0, 760px); justify-content: space-between; }
  .founder .byline { flex-direction: column; align-items: flex-start; gap: 16px; margin: 0; }
  .founder .byline img { width: 96px; height: 96px; }
  .founder .note { font-size: 18px; }

  .call .wrap { max-width: calc(600px + 2 * var(--pad)); justify-items: center; text-align: center; gap: 16px; }
  .call .text { font-size: 18px; }
  .call .cta { padding-top: 12px; }

  .footer .wrap { grid-template-columns: auto 1fr auto; align-items: center; gap: 40px; padding-top: 36px; padding-bottom: 48px; }
  .footer .row { display: contents; }
  .footer .brand { order: -1; }
  .footer .disclaimer { text-align: center; }

  .intro .wrap, .survey .wrap { max-width: calc(760px + 2 * var(--pad)); }
  .intro .wrap { padding-top: 64px; }
  .intro .lead { font-size: 18px; }
}