:root {
  --ink: #1d1d1f;
  --black: #000000;
  --muted: #6e6e73;
  --quiet: #86868b;
  --paper: #ffffff;
  --surface: #f5f5f7;
  --surface-raised: #fbfbfd;
  --line: #d2d2d7;
  --line-soft: rgba(0, 0, 0, 0.08);
  --danger: #b42318;
  --radius: 22px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body { margin: 0; min-height: 100vh; background: var(--paper); }
body::selection, body *::selection { background: var(--ink); color: var(--paper); }

a, button, input, textarea { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 200;
  top: -80px;
  left: 20px;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--black);
  color: white;
  text-decoration: none;
  transition: top 160ms ease;
}
.skip-link:focus { top: 14px; }

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  width: 100%;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, 0.82);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
}

.nav-shell {
  width: min(1120px, 100%);
  height: 58px;
  margin: auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  gap: 9px;
  align-items: center;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 650;
  letter-spacing: -.025em;
  text-decoration: none;
}

.brand-mark {
  width: 23px;
  height: 23px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: var(--black);
  color: white;
  font-size: .72rem;
  font-weight: 750;
  letter-spacing: -.04em;
}

.site-header nav { display: flex; gap: 24px; align-items: center; }
.site-header nav a, .link-button {
  color: var(--ink);
  font: inherit;
  font-size: .88rem;
  font-weight: 500;
  text-decoration: none;
}
.site-header nav .button { color: white; }
.site-header nav > a:not(.button), .link-button { transition: opacity 160ms ease; }
.site-header nav > a:not(.button):hover, .link-button:hover { opacity: .55; }
.inline { display: inline; }
.link-button { padding: 0; border: 0; background: none; cursor: pointer; }

main { width: min(1120px, 100%); min-height: calc(100vh - 160px); margin: 0 auto; padding: 48px 28px 100px; }
.landing-page main { padding-top: 0; }

footer { border-top: 1px solid var(--line-soft); color: var(--quiet); font-size: .78rem; }
.footer-shell {
  width: min(1120px, 100%);
  min-height: 96px;
  margin: auto;
  padding: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-brand { color: var(--ink); font-weight: 650; letter-spacing: -.02em; }

h1, h2, h3 { color: var(--ink); text-wrap: balance; }
h1 { font-size: clamp(2.6rem, 7vw, 5.75rem); line-height: .98; letter-spacing: -.067em; }
h2 { font-size: 1.35rem; line-height: 1.16; letter-spacing: -.035em; }
h3 { letter-spacing: -.025em; }
p { line-height: 1.55; }

.eyebrow, .principle-label {
  margin: 0 0 18px;
  color: var(--quiet);
  font-size: .72rem;
  font-weight: 650;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.hero { padding: clamp(76px, 11vw, 142px) 0 90px; text-align: center; }
.hero-copy { position: relative; z-index: 2; max-width: 940px; margin: auto; }
.hero h1 { margin: 28px 0 26px; }
.lede {
  max-width: 660px;
  margin: 0 auto;
  color: var(--muted);
  font-size: clamp(1.12rem, 2.2vw, 1.4rem);
  line-height: 1.48;
  letter-spacing: -.016em;
}
.availability {
  width: fit-content;
  margin: 0 auto;
  padding: 7px 12px;
  display: flex;
  gap: 8px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: .75rem;
  font-weight: 600;
}
.availability span { width: 6px; height: 6px; border-radius: 50%; background: var(--ink); }
.actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin-top: 32px; }
.hero .actions { justify-content: center; }

.button, .danger {
  min-height: 46px;
  padding: 12px 21px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  appearance: none;
  border: 1px solid var(--black);
  border-radius: 999px;
  background: var(--black);
  color: white;
  cursor: pointer;
  font: inherit;
  font-size: .92rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 180ms ease, opacity 180ms ease, background 180ms ease;
}
.button:hover, .danger:hover { opacity: .72; transform: translateY(-1px); }
.button:active, .danger:active { transform: translateY(0); }
.button:disabled { cursor: wait; opacity: .45; transform: none; }
.button.ghost { border-color: transparent; background: var(--surface); color: var(--ink); }
.button.small { min-height: 34px; padding: 7px 14px; font-size: .8rem; }
.full { width: 100%; }
.danger { border-color: var(--danger); border-radius: 12px; background: var(--danger); }
.text-link { color: var(--ink); font-size: .94rem; font-weight: 600; text-decoration: none; }
.text-link span { display: inline-block; margin-left: 4px; transition: transform 160ms ease; }
.text-link:hover span { transform: translateX(3px); }

.product-stage {
  position: relative;
  min-height: 630px;
  margin-top: clamp(80px, 10vw, 128px);
  padding: 74px 24px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 36px;
  background: var(--surface);
}
.stage-glow {
  position: absolute;
  top: 4%;
  left: 50%;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,.95) 0, rgba(255,255,255,.5) 42%, rgba(255,255,255,0) 72%);
  transform: translateX(-50%);
}
.identity-preview {
  position: relative;
  z-index: 1;
  width: min(390px, 100%);
  min-height: 492px;
  padding: 22px 26px 28px;
  border: 1px solid rgba(0,0,0,.09);
  border-radius: 30px;
  background: rgba(255,255,255,.94);
  box-shadow: 0 42px 90px rgba(0,0,0,.13), 0 3px 9px rgba(0,0,0,.05);
  text-align: center;
}
.preview-topline { display: flex; justify-content: space-between; color: var(--quiet); font-size: .72rem; font-weight: 600; }
.preview-lock { width: 20px; height: 20px; display: grid; place-items: center; border-radius: 50%; background: var(--black); color: white; }
.preview-avatar {
  width: 88px;
  height: 88px;
  margin: 42px auto 16px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(145deg, #111, #777);
  color: white;
  font-size: 2rem;
  font-weight: 620;
}
.preview-badge { width: fit-content; margin: auto; padding: 5px 9px; border-radius: 999px; background: var(--surface); color: #3a3a3c; font-size: .67rem; font-weight: 700; }
.identity-preview h2 { margin: 13px 0 3px; font-size: 2rem; }
.preview-alias { margin: 0; color: var(--quiet); font-size: .9rem; }
.preview-proof { margin: 29px 0 20px; padding: 18px 0; display: flex; align-items: start; justify-content: space-between; border-block: 1px solid var(--line-soft); text-align: left; }
.preview-proof span { color: var(--quiet); font-size: .68rem; font-weight: 650; letter-spacing: .07em; text-transform: uppercase; }
.preview-proof strong { max-width: 150px; font-size: .92rem; line-height: 1.35; text-align: right; }
.preview-links { display: grid; gap: 9px; }
.preview-links span { height: 38px; border-radius: 10px; background: var(--surface); }
.preview-links span:nth-child(2) { opacity: .72; }
.preview-links span:nth-child(3) { opacity: .44; }

.principles { display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid var(--line-soft); }
.principles article { padding: 56px 36px 62px 0; }
.principles article + article { padding-left: 36px; border-left: 1px solid var(--line-soft); }
.principles h2 { max-width: 270px; margin: 0 0 14px; }
.principles p:last-child { max-width: 285px; margin: 0; color: var(--muted); font-size: .94rem; }

.how-it-works { padding: 150px 0; display: grid; grid-template-columns: minmax(0, .9fr) minmax(400px, 1.1fr); gap: 90px; }
.section-intro h2 { margin: 0; font-size: clamp(2.3rem, 4.6vw, 4.1rem); line-height: 1.02; letter-spacing: -.055em; }
.steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.steps li { padding: 26px 0; display: grid; grid-template-columns: 56px 1fr; gap: 20px; border-bottom: 1px solid var(--line); }
.steps > li > span { padding-top: 3px; color: var(--quiet); font-size: .72rem; font-weight: 650; }
.steps h3 { margin: 0 0 7px; font-size: 1.08rem; }
.steps p { max-width: 430px; margin: 0; color: var(--muted); font-size: .94rem; }

.privacy-callout {
  padding: clamp(52px, 8vw, 88px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: end;
  border-radius: 34px;
  background: var(--black);
  color: white;
}
.privacy-callout .eyebrow { color: rgba(255,255,255,.52); }
.privacy-callout h2 { max-width: 500px; margin: 0; color: white; font-size: clamp(2.5rem, 5vw, 4.6rem); line-height: .98; letter-spacing: -.058em; }
.privacy-callout > p { max-width: 430px; margin: 0; color: rgba(255,255,255,.68); font-size: 1.03rem; }

.closing-cta { padding: 150px 0 55px; text-align: center; }
.closing-cta h2 { margin: 0; font-size: clamp(2.5rem, 5vw, 4.5rem); letter-spacing: -.055em; }
.closing-cta .actions { justify-content: center; }

.three-up { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.three-up article, .card, .profile-card { padding: 30px; border: 1px solid var(--line-soft); border-radius: var(--radius); background: var(--surface-raised); }
.three-up article span { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: var(--ink); color: white; font-weight: 700; }
.three-up p, .muted { color: var(--muted); line-height: 1.55; }

.card h1 { margin: .25em 0; font-size: 2.6rem; }
.card > p:not(.eyebrow), .security > p { color: var(--muted); }
.narrow { max-width: 580px; margin: 45px auto; }
label { display: grid; gap: 8px; margin: 20px 0; color: var(--ink); font-size: .88rem; font-weight: 600; }
input, textarea {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: white;
  color: var(--ink);
  font: inherit;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}
input:focus, textarea:focus { border-color: var(--ink); box-shadow: 0 0 0 3px rgba(0,0,0,.06); outline: none; }
textarea { resize: vertical; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.prefix-input { display: flex; align-items: center; overflow: hidden; border: 1px solid var(--line); border-radius: 11px; background: white; }
.prefix-input span { padding-left: 14px; color: var(--muted); }
.prefix-input input { border: 0; box-shadow: none; }
.form-error { min-height: 1.4em; color: var(--danger) !important; }

.verification-result { padding: 52px 42px 40px; text-align: center; }
.verification-result h1 { margin-top: .18em; }
.verification-result > p:not(.eyebrow) { max-width: 390px; margin: 0 auto 28px; }
.verification-result .button { margin-top: 6px; }
.verification-animation { position: relative; width: 128px; height: 128px; margin: 0 auto 30px; }
.verification-face, .verification-symbol { position: absolute; inset: 0; width: 100%; height: 100%; }
.verification-face { fill: none; stroke: var(--black); stroke-linecap: round; stroke-width: 4; animation: verification-face-out 2.1s cubic-bezier(.4,0,.2,1) forwards; }
.verification-face .face-eye { fill: var(--black); stroke: none; }
.verification-face .face-mouth { fill: none; }
.verification-face .face-scan { stroke-width: 2; animation: verification-scan 1.05s ease-in-out 2; }
.verification-symbol { opacity: 0; transform: scale(.72); animation: verification-symbol-in .55s 1.42s cubic-bezier(.2,.9,.25,1.25) forwards; }
.verification-symbol circle { stroke: none; }
.verification-symbol path { fill: none; stroke: white; stroke-linecap: round; stroke-linejoin: round; stroke-width: 8; }
.verification-result--success .verification-symbol circle { fill: #248a3d; }
.verification-result--failure .verification-symbol circle { fill: #d92d20; }
.verification-continue-note { margin-top: 15px !important; margin-bottom: 0 !important; color: var(--quiet) !important; font-size: .78rem; }

@keyframes verification-scan {
  0%, 100% { transform: translateY(-28px); opacity: .15; }
  50% { transform: translateY(28px); opacity: .8; }
}
@keyframes verification-face-out {
  0%, 62% { opacity: 1; transform: scale(1); }
  82%, 100% { opacity: 0; transform: scale(.86); }
}
@keyframes verification-symbol-in {
  to { opacity: 1; transform: scale(1); }
}

.portal-heading { display: flex; align-items: end; justify-content: space-between; margin-bottom: 26px; }
.portal-heading h1 { margin: .1em 0; font-size: 3rem; }
.portal-grid { display: grid; grid-template-columns: minmax(0, 1.8fr) minmax(300px, 1fr); gap: 20px; }
.avatar, .profile-photo { width: 110px; height: 110px; border-radius: 50%; object-fit: cover; }
.section-label { margin-top: 28px; font-weight: 700; }
.section-label span, .count { float: right; color: var(--muted); font-size: .86rem; font-weight: 400; }
.link-row { display: grid; grid-template-columns: 1fr 2fr; gap: 8px; }
.link-row input { margin-top: 8px; }
.empty-link { display: none; }
.link-row:nth-child(-n+4) { display: grid; }
.check { display: flex; grid-template-columns: auto 1fr; align-items: start; font-weight: 500; }
.check input { width: auto; }
.security hr { margin: 30px 0; border: 0; border-top: 1px solid var(--line); }
.verified { display: inline-block; padding: 6px 10px; border-radius: 999px; background: #e8e8ed; color: var(--ink); font-size: .8rem; font-weight: 700; }

.profile-card { max-width: 680px; margin: 30px auto; padding: 48px; text-align: center; }
.profile-card h1 { margin: .35em 0 .05em; font-size: 3.8rem; }
.alias { color: var(--muted); font-size: 1.15rem; }
.proof { margin: 30px 0; padding: 18px 0; display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid var(--line); text-align: left; }
.proof div { padding: 0 14px; }
.proof div + div { border-left: 1px solid var(--line); }
dt { color: var(--muted); font-size: .7rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
dd { margin: 5px 0 0; font-weight: 650; word-break: break-word; }
.bio { font-size: 1.15rem; line-height: 1.55; }
.public-links { display: grid; gap: 10px; margin: 30px 0; }
.public-links a { padding: 15px 18px; display: flex; justify-content: space-between; border: 1px solid var(--line); border-radius: 12px; color: var(--ink); font-weight: 650; text-decoration: none; transition: background 160ms ease; }
.public-links a:hover { background: var(--surface); }
.ask-box { margin-top: 30px; padding: 22px; border-radius: 16px; background: var(--surface); text-align: left; }
.ask-form { display: flex; gap: 8px; }
.ask-answer { line-height: 1.5; }
.attestation-link { display: block; margin-top: 28px; color: var(--muted); font-size: .88rem; }

@media (max-width: 820px) {
  .principles, .portal-grid, .how-it-works, .privacy-callout { grid-template-columns: 1fr; }
  .principles article, .principles article + article { padding: 38px 0; border-left: 0; }
  .principles article + article { border-top: 1px solid var(--line-soft); }
  .how-it-works { gap: 52px; padding: 105px 0; }
  .privacy-callout { gap: 44px; }
}

@media (max-width: 640px) {
  .nav-shell, main { padding-inline: 20px; }
  .site-header nav { gap: 14px; }
  .site-header nav > a:not(.button) { display: none; }
  .hero { padding-top: 72px; }
  .hero h1 { font-size: clamp(3rem, 15vw, 4.5rem); }
  .product-stage { min-height: 550px; margin-inline: -20px; padding-inline: 18px; border-radius: 0; }
  .identity-preview { padding-inline: 22px; }
  .privacy-callout { margin-inline: -20px; padding: 56px 26px; border-radius: 0; }
  .closing-cta { padding-top: 100px; }
  .footer-shell { padding-inline: 20px; }
  .three-up { grid-template-columns: 1fr; }
  .portal-heading { align-items: start; gap: 15px; }
  .split, .proof { grid-template-columns: 1fr; }
  .proof div + div { margin-top: 12px; border-left: 0; }
  .profile-card { padding: 30px 20px; }
  .profile-card h1 { font-size: 2.8rem; }
  .ask-form { display: grid; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
  .verification-face { display: none; }
  .verification-symbol { opacity: 1; transform: none; animation: none; }
}