:root {
  --primary: #5672db;
  --primary-dark: #4459bf;
  --lavender: #8b82e6;
  --mint: #62b896;
  --peach: #e5a67a;
  --blush: #f0c2cc;
  --navy: #272d4a;
  --bg: #f2f4fa;
  --accent-tint: #eef0fa;

  --accent: var(--primary);
  --accent-dark: var(--primary-dark);
  --accent-light: var(--accent-tint);
  --text: var(--navy);
  --text-muted: #5c6280;
  --surface: #ffffff;
  --border: #e2e6f0;
  --white: #ffffff;
  --radius: 28px;
  --radius-lg: 28px;
  --shadow: 0 4px 24px rgba(39, 45, 74, 0.08);
  --font: "DM Sans", -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  --font-brand: "Sharp Serif Display", Georgia, serif;
  --font-heading: "DM Sans", var(--font);
  --font-heading-italic: "Sharp Serif Display", Georgia, serif;
  --font-hero: "DM Sans", var(--font);
  --font-hero-script: "Sharp Serif Display", Georgia, serif;
  --max-w: 1120px;
}

@font-face {
  font-family: "Sharp Serif Display";
  src: url("fonts/SharpSerifDisplay-Regular-Trial.otf") format("opentype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Sharp Serif Display";
  src: url("fonts/SharpSerifDisplay-Italic-Trial.otf") format("opentype");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}







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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(100% - 3rem, var(--max-w));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

h2 {
  font-family: var(--font-heading);
  font-weight: 500;
  letter-spacing: -0.02em;
}

h3 {
  font-family: var(--font-heading);
  font-weight: 500;
  letter-spacing: -0.02em;
}

em {
  font-family: var(--font-heading-italic);
  font-style: italic;
  font-weight: 400;
}

/* ——— Full-screen hero ——— */

.hero-full {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  color: var(--white);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--lavender) 100%);
}

.hero-bg__photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.hero-bg.has-photo .hero-bg__photo {
  opacity: 1;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(105deg, rgba(39, 45, 74, 0.5) 0%, rgba(39, 45, 74, 0.2) 45%, rgba(86, 114, 219, 0.15) 100%),
    linear-gradient(to top, rgba(39, 45, 74, 0.4) 0%, transparent 40%);
}

.site-header {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 2rem 3rem;
}

.logo,
.footer-logo {
  font-family: var(--font-brand);
  font-size: 1.75rem;
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.02em;
  color: inherit;
}

.logo-health {
  font-family: inherit;
  font-weight: inherit;
  font-style: inherit;
  letter-spacing: inherit;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.nav a:not(.nav-cta) {
  color: rgba(255, 255, 255, 0.82);
  transition: color 0.2s ease;
}

.nav a:not(.nav-cta):hover {
  color: var(--white);
}

.nav-cta {
  padding: 0.75rem 1.375rem;
  border-radius: var(--radius);
  background: var(--white);
  color: var(--navy) !important;
  letter-spacing: 0.1em;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.hero-inner {
  position: relative;
  z-index: 2;
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(560px, 760px);
  gap: 2.5rem;
  align-items: center;
  padding: 0 3rem 6rem;
  margin-top: -2rem;
}

.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 42rem;
  padding: 0;
}

.hero-content h1 {
  margin: 0 0 1.75rem;
  font-family: var(--font-hero);
  font-size: clamp(2.5rem, 5.5vw, 3.75rem);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.hero-content h1 em {
  font-family: var(--font-hero-script);
  font-style: italic;
  font-weight: 400;
  font-size: 1.08em;
  letter-spacing: -0.01em;
}

.hero-lead {
  margin: 0 0 2.5rem;
  max-width: 32rem;
  font-size: 0.9375rem;
  font-weight: 400;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.78);
}

.btn-hero {
  display: inline-flex;
  align-items: center;
  gap: 0;
  width: fit-content;
  padding: 0.375rem 0.375rem 0.375rem 1.75rem;
  border-radius: var(--radius);
  background: var(--white);
  color: var(--navy);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-hero:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
}

.btn-hero__icon {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  margin-left: 1.25rem;
  border-radius: var(--radius);
  background: var(--navy);
  color: var(--white);
}

.lab-showcase {
  justify-self: end;
  width: min(100%, 760px);
}

.lab-showcase__card {
  position: relative;
  padding: 2rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.1);
  border: 1.5px solid rgba(255, 255, 255, 0.42);
  box-shadow:
    0 24px 64px rgba(39, 45, 74, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(24px) saturate(1.15);
  -webkit-backdrop-filter: blur(24px) saturate(1.15);
  color: var(--white);
  isolation: isolate;
}

.lab-showcase__card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: rgba(255, 255, 255, 0.04);
  pointer-events: none;
}

.lab-showcase__header {
  position: relative;
  z-index: 1;
  margin-bottom: 1.5rem;
}

.lab-showcase__title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.375rem;
}

.lab-showcase__name {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 600;
}

.lab-showcase__status {
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lab-showcase__status--good {
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: var(--white);
}

.lab-showcase__meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.lab-showcase__value {
  margin: 0;
  font-size: 2rem;
  font-weight: 700;
  color: var(--white);
}

.lab-showcase__value span {
  font-size: 1.125rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.72);
}

.lab-showcase__ref {
  margin: 0;
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.62);
}

.lab-showcase__chart {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  overflow: visible;
}

@media (prefers-reduced-motion: no-preference) {
  .tsh-chart .chart-grid,
  .tsh-chart .chart-area,
  .tsh-chart .chart-labels {
    opacity: 0;
    transition: opacity 0.5s ease;
  }

  .tsh-chart .chart-line {
    stroke-dasharray: var(--line-length, 600);
    stroke-dashoffset: var(--line-length, 600);
    transition: stroke-dashoffset 1.35s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .tsh-chart .chart-point {
    opacity: 0;
    transition: opacity 0.35s ease;
    transition-delay: calc(0.5s + var(--point-i, 0) * 0.1s);
  }

  .tsh-chart .chart-tooltip {
    opacity: 0;
    transform: translateY(8px);
    transition:
      opacity 0.45s ease,
      transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .tsh-chart .chart-marker {
    opacity: 0;
    transition: opacity 0.35s ease;
  }

  .tsh-chart.is-animated .chart-grid,
  .tsh-chart.is-animated .chart-area,
  .tsh-chart.is-animated .chart-labels {
    opacity: 1;
  }

  .tsh-chart.is-animated .chart-grid {
    transition-delay: 0.05s;
  }

  .tsh-chart.is-animated .chart-area {
    transition-delay: 0.85s;
  }

  .tsh-chart.is-animated .chart-labels {
    transition-delay: 1.05s;
  }

  .tsh-chart.is-animated .chart-line {
    stroke-dashoffset: 0;
  }

  .tsh-chart.is-animated .chart-point {
    opacity: 1;
  }

  .tsh-chart.is-animated .chart-tooltip {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 1.15s;
  }

  .tsh-chart.is-animated .chart-marker {
    opacity: 1;
    transition-delay: 1.25s;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tsh-chart.is-animated .chart-grid,
  .tsh-chart.is-animated .chart-area,
  .tsh-chart.is-animated .chart-labels,
  .tsh-chart.is-animated .chart-point,
  .tsh-chart.is-animated .chart-tooltip,
  .tsh-chart.is-animated .chart-marker {
    opacity: 1;
    transform: none;
  }

  .tsh-chart.is-animated .chart-line {
    stroke-dashoffset: 0;
  }
}

.scroll-hint {
  position: absolute;
  z-index: 2;
  right: 3rem;
  bottom: 2.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.875rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.2s ease;
}

.scroll-hint:hover {
  color: var(--white);
}

.scroll-hint__icon {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: var(--white);
}

/* ——— Lazy-loaded sections ——— */

.lazy-section {
  content-visibility: auto;
  contain-intrinsic-size: auto 520px;
}

@media (prefers-reduced-motion: no-preference) {
  .lazy-section:not(.is-visible) .section-head,
  .lazy-section:not(.is-visible) .lazy-item,
  .lazy-section:not(.is-visible) .waitlist-inner,
  .lazy-section:not(.is-visible) .footer-inner,
  .lazy-section:not(.is-visible) .container > p {
    opacity: 0;
    transform: translateY(1.5rem);
  }

  .lazy-section.is-visible .section-head,
  .lazy-section.is-visible .lazy-item,
  .lazy-section.is-visible .waitlist-inner,
  .lazy-section.is-visible .footer-inner,
  .lazy-section.is-visible .container > p {
    opacity: 1;
    transform: none;
    transition:
      opacity 0.65s ease,
      transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .lazy-section.is-visible .lazy-item:nth-child(1) { transition-delay: 0.05s; }
  .lazy-section.is-visible .lazy-item:nth-child(2) { transition-delay: 0.12s; }
  .lazy-section.is-visible .lazy-item:nth-child(3) { transition-delay: 0.19s; }
  .lazy-section.is-visible .lazy-item:nth-child(4) { transition-delay: 0.26s; }
}

@media (prefers-reduced-motion: reduce) {
  .lazy-section .section-head,
  .lazy-section .lazy-item,
  .lazy-section .waitlist-inner,
  .lazy-section .footer-inner,
  .lazy-section .container > p {
    opacity: 1;
    transform: none;
  }
}

/* ——— Below-fold sections ——— */

.eyebrow {
  margin: 0 0 0.75rem;
  font-family: var(--font-heading);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-dark);
}

.section-head {
  max-width: 560px;
  margin-bottom: 3.5rem;
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.section-head h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.12;
}

.section-head h2 em {
  font-family: var(--font-heading-italic);
  font-style: italic;
  font-weight: 400;
  font-size: 1.08em;
}

.section-lead {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.0625rem;
  line-height: 1.65;
}

.features {
  padding: 6rem 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.feature-card {
  padding: 2.5rem;
  background: var(--navy);
  color: var(--white);
}

.feature-label {
  display: block;
  margin-bottom: 1.25rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--lavender);
}

.feature-card h3 {
  margin: 0 0 0.625rem;
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 500;
  color: var(--white);
}

.feature-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.68);
  line-height: 1.65;
}

.how-it-works {
  padding: 6rem 0;
  background: var(--surface);
  border-block: 1px solid var(--border);
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.steps li {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.step-num {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--white);
  background: var(--navy);
}

.steps h3 {
  margin: 0 0 0.375rem;
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 500;
}

.steps p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.waitlist {
  padding: 6rem 0;
}

.waitlist-inner {
  padding: 4rem 3rem;
  border-radius: var(--radius-lg);
  background: var(--navy);
  color: var(--white);
  text-align: center;
}

.waitlist-copy h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 4vw, 2.5rem);
  color: var(--white);
}

.waitlist-copy p {
  margin: 0 auto 2rem;
  max-width: 440px;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.65;
}

.waitlist-inner .eyebrow {
  color: var(--blush);
}

.waitlist-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  align-items: center;
  max-width: 440px;
  margin-inline: auto;
}

.waitlist-form input {
  flex: 1 1 220px;
  align-self: center;
  min-width: 0;
  height: 44px;
  max-height: 44px;
  padding: 0 1.25rem;
  border: none;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.9375rem;
  line-height: 44px;
  box-sizing: border-box;
}

.waitlist-form input:focus {
  outline: 2px solid var(--peach);
  outline-offset: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary {
  background: var(--white);
  color: var(--navy);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.form-note {
  margin: 1.25rem auto 0;
  max-width: 440px;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.55;
}

.form-note a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.form-status {
  margin: 1rem auto 0;
  max-width: 440px;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.45;
}

.form-status--success {
  color: var(--mint);
}

.form-status--error {
  color: #ffb4a8;
}

.disclaimer {
  padding: 2rem 0 4rem;
}

.disclaimer p {
  margin: 0;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius);
  background: rgba(229, 166, 122, 0.15);
  border: 1px solid rgba(229, 166, 122, 0.35);
  font-size: 0.875rem;
  color: var(--navy);
  line-height: 1.65;
}

.site-footer {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-logo {
  font-size: 1.25rem;
  color: var(--navy);
}

.footer-nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-nav a:hover {
  color: var(--text);
}

/* ——— Responsive ——— */

@media (max-width: 1280px) {
  .site-header {
    padding: 1.5rem 1.5rem;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    padding: 0 1.5rem 5rem;
    gap: 20px;
    margin-top: 0;
    align-items: start;
  }

  .lab-showcase {
    justify-self: center;
    order: -1;
    width: min(100%, 760px);
    margin-bottom: 0;
  }

  .hero-content {
    text-align: center;
    align-items: center;
    margin-inline: auto;
    margin-top: 0;
  }

  .hero-content h1 {
    margin-top: 0;
  }

  .hero-lead {
    margin-inline: auto;
  }

  .scroll-hint {
    right: 1.5rem;
    bottom: 1.5rem;
  }
}

@media (max-width: 960px) {
  .steps {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 720px) {
  .nav a:not(.nav-cta) {
    display: none;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .waitlist-inner {
    padding: 2.5rem 1.5rem;
  }

  .waitlist-form {
    flex-direction: column;
    align-items: stretch;
  }

  .waitlist-form input,
  .waitlist-form .btn {
    width: 100%;
  }

  .waitlist-form input {
    flex: 0 0 auto;
    width: 100%;
    height: 30px;
    max-height: 30px;
    padding: 0 1rem;
    font-size: 0.875rem;
    line-height: 30px;
    box-sizing: border-box;
  }

  .scroll-hint span:first-child {
    display: none;
  }
}