:root {
  --black: #030507;
  --pure-black: #000000;
  --carbon: #0b0f12;
  --graphite: #151a1f;
  --silver: #d8dde2;
  --soft-silver: #a7b0b8;
  --white: #f6f8fa;
  --teal: #00d2be;
  --border: rgba(216, 221, 226, 0.16);
  --shadow: 0 24px 80px rgba(0, 210, 190, 0.12);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", sans-serif;
  background: var(--black);
  color: var(--white);
  line-height: 1.6;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
}

.container {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
}

.narrow {
  max-width: 790px;
  text-align: center;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(3, 5, 7, 0.92);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  min-height: 82px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 28px;
}

.nav-brand {
  font-weight: 900;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: 0.96rem;
}

.main-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 34px;
}

.main-nav a {
  color: var(--soft-silver);
  font-size: 0.9rem;
  font-weight: 800;
  transition: 0.2s ease;
}

.main-nav a:hover {
  color: var(--teal);
}

.nav-button {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 23px;
  border-radius: 999px;
  background: var(--white);
  color: var(--black);
  font-weight: 900;
  font-size: 0.92rem;
  transition: 0.2s ease;
}

.nav-button:hover {
  background: var(--teal);
  transform: translateY(-1px);
}

/* Hero */

.hero {
  position: relative;
  overflow: hidden;
  padding: 46px 0 104px;
  background:
    radial-gradient(circle at 50% 48%, rgba(0, 210, 190, 0.11), transparent 32%),
    linear-gradient(
      180deg,
      #000000 0%,
      #000000 44%,
      #041012 72%,
      #030507 100%
    );
  text-align: center;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--teal), transparent);
}

.hero-inner {
  max-width: 1040px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-main-logo {
  width: 390px;
  max-width: 82vw;
  height: auto;
  margin-bottom: 30px;
}

.eyebrow {
  color: var(--teal);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 900;
  margin-bottom: 18px;
}

h1,
h2,
h3 {
  line-height: 1.04;
  letter-spacing: -0.055em;
}

h1 {
  font-size: clamp(3.15rem, 7vw, 6.1rem);
  max-width: 1040px;
  margin: 0 auto;
}

h2 {
  font-size: clamp(2.2rem, 4.8vw, 4.6rem);
}

h3 {
  font-size: 1.35rem;
}

.hero-text {
  max-width: 720px;
  color: var(--silver);
  font-size: 1.16rem;
  margin-top: 26px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 25px;
  border-radius: 999px;
  font-weight: 900;
  border: 1px solid transparent;
  cursor: pointer;
  transition: 0.2s ease;
}

.btn-primary {
  background: var(--teal);
  color: var(--black);
  box-shadow: 0 14px 40px rgba(0, 210, 190, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: #20ead8;
}

.btn-secondary {
  border-color: var(--border);
  color: var(--white);
  background: rgba(255, 255, 255, 0.03);
}

.btn-secondary:hover {
  border-color: var(--teal);
  color: var(--teal);
}

/* Sections */

.section {
  padding: 94px 0;
  background: var(--black);
}

.intro-section {
  background:
    radial-gradient(circle at 50% 10%, rgba(0, 210, 190, 0.08), transparent 30%),
    linear-gradient(180deg, var(--black), var(--carbon));
}

.intro-section p,
.section-heading p,
.trust-section p,
.enquiry-grid p,
.results-section p {
  color: var(--soft-silver);
  font-size: 1.05rem;
  margin-top: 18px;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 38px;
}

/* Results */

.results-section {
  background:
    radial-gradient(circle at 80% 20%, rgba(0, 210, 190, 0.08), transparent 32%),
    var(--carbon);
}

.results-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}

.results-list {
  display: grid;
  gap: 14px;
}

.result-item {
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 20px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.018));
}

.result-item span {
  display: inline-block;
  color: var(--teal);
  font-weight: 900;
  margin-bottom: 10px;
}

.result-item p {
  margin: 0;
}

/* Test Cards */

.tests-section {
  background:
    radial-gradient(circle at 80% 8%, rgba(0, 210, 190, 0.08), transparent 30%),
    var(--black);
}

.test-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.test-card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 30px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.018)),
    rgba(11, 15, 18, 0.72);
  overflow: hidden;
  transition: 0.2s ease;
}

.test-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 85% 10%, rgba(0, 210, 190, 0.12), transparent 30%);
  opacity: 0;
  transition: 0.2s ease;
}

.test-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 210, 190, 0.42);
  box-shadow: var(--shadow);
}

.test-card:hover::before {
  opacity: 1;
}

.test-card > * {
  position: relative;
}

.featured-test {
  border-color: rgba(0, 210, 190, 0.38);
}

.test-topline {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  margin-bottom: 22px;
}

.test-tag {
  color: var(--teal);
  border: 1px solid rgba(0, 210, 190, 0.35);
  background: rgba(0, 210, 190, 0.08);
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.09em;
}

.test-price {
  color: var(--silver);
  font-weight: 900;
  font-size: 0.95rem;
}

.test-card h3 {
  font-size: clamp(1.6rem, 3vw, 2.35rem);
  max-width: 520px;
}

.test-card p {
  color: var(--soft-silver);
  margin-top: 16px;
}

.test-highlights {
  display: grid;
  gap: 10px;
  margin: 22px 0 24px;
  padding: 0;
  list-style: none;
}

.test-highlights li {
  position: relative;
  color: var(--silver);
  padding-left: 22px;
  font-size: 0.95rem;
}

.test-highlights li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 8px;
  height: 8px;
  background: var(--teal);
  border-radius: 50%;
  box-shadow: 0 0 18px rgba(0, 210, 190, 0.55);
}

.test-details {
  border-top: 1px solid var(--border);
  padding-top: 18px;
}

.test-details summary {
  cursor: pointer;
  color: var(--white);
  font-weight: 900;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.test-details summary::-webkit-details-marker {
  display: none;
}

.test-details summary::after {
  content: "+";
  color: var(--teal);
  font-size: 1.4rem;
  line-height: 1;
}

.test-details[open] summary::after {
  content: "–";
}

.details-content {
  margin-top: 16px;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  background: rgba(0, 0, 0, 0.28);
}

.biomarker-groups {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px 22px;
}

.biomarker-groups.compact {
  grid-template-columns: repeat(2, 1fr);
}

.biomarker-groups h4 {
  color: var(--white);
  font-size: 0.9rem;
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.biomarker-groups ul {
  list-style: none;
  display: grid;
  gap: 7px;
  padding: 0;
  margin: 0;
}

.biomarker-groups li {
  position: relative;
  color: var(--soft-silver);
  font-size: 0.88rem;
  line-height: 1.45;
  padding-left: 16px;
}

.biomarker-groups li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  background: var(--teal);
  border-radius: 50%;
  opacity: 0.9;
}

.other-tests-banner {
  margin-top: 24px;
  padding: 30px;
  border: 1px solid rgba(0, 210, 190, 0.28);
  border-radius: 28px;
  background:
    radial-gradient(circle at 85% 20%, rgba(0, 210, 190, 0.12), transparent 28%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.018));
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 26px;
}

.other-tests-banner h3 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
}

.other-tests-banner p {
  color: var(--soft-silver);
  margin-top: 12px;
  max-width: 680px;
}

.test-note {
  color: var(--soft-silver);
  font-size: 0.86rem;
  margin-top: 20px;
  opacity: 0.78;
}

/* Process */

.process-section {
  background:
    radial-gradient(circle at 15% 20%, rgba(0, 210, 190, 0.08), transparent 30%),
    var(--carbon);
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.step {
  border: 1px solid var(--border);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.018));
  border-radius: 24px;
  padding: 30px;
}

.step span {
  display: inline-flex;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  background: rgba(0, 210, 190, 0.12);
  color: var(--teal);
  font-weight: 900;
  margin-bottom: 34px;
}

.step p {
  color: var(--soft-silver);
  margin-top: 14px;
}

/* Trust */

.split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: center;
}

/* Enquiry */

.enquiry-section {
  background:
    radial-gradient(circle at 80% 10%, rgba(0, 210, 190, 0.1), transparent 30%),
    linear-gradient(180deg, var(--carbon), var(--black));
}

.enquiry-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 54px;
  align-items: start;
}

.enquiry-form {
  border: 1px solid var(--border);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.018));
  border-radius: 24px;
  padding: 30px;
}

.form-row {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

label {
  color: var(--silver);
  font-size: 0.9rem;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--white);
  border-radius: 14px;
  padding: 14px 15px;
  outline: none;
}

select {
  color-scheme: dark;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--teal);
}

textarea {
  resize: vertical;
}

.form-button {
  width: 100%;
  margin-top: 8px;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 34px 0;
  background: #020304;
  color: var(--soft-silver);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
  font-size: 0.9rem;
}

.footer-copy p + p {
  margin-top: 4px;
}

.site-credit {
  display: flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
  color: var(--soft-silver);
  font-size: 0.86rem;
}

.site-credit span {
  opacity: 0.85;
}

.site-credit a {
  display: inline-flex;
  align-items: center;
}

.diviti-credit-logo {
  width: 142px;
  height: auto;
  opacity: 0.86;
  transition: 0.2s ease;
}

.diviti-credit-logo:hover {
  opacity: 1;
  transform: translateY(-1px);
}

/* Responsive */

@media (max-width: 980px) {
  .nav-inner {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 16px 0;
  }

  .nav-brand {
    text-align: center;
  }

  .nav-button {
    justify-self: center;
  }

  .main-nav {
    flex-wrap: wrap;
    gap: 22px;
  }

  .hero {
    padding: 42px 0 82px;
  }

  .hero-main-logo {
    width: 330px;
  }

  .results-grid,
  .split,
  .enquiry-grid {
    grid-template-columns: 1fr;
  }

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

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

  .footer-inner {
    align-items: flex-start;
  }

  .other-tests-banner {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(100% - 26px, 1160px);
  }

  .nav-brand {
    font-size: 0.84rem;
  }

  .main-nav {
    gap: 18px;
  }

  .main-nav a {
    font-size: 0.78rem;
  }

  .nav-button {
    width: 100%;
  }

  .hero {
    padding: 32px 0 68px;
  }

  .hero-main-logo {
    width: 260px;
    margin-bottom: 26px;
  }

  h1 {
    font-size: clamp(2.65rem, 13vw, 4rem);
  }

  .hero-text {
    font-size: 1.02rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
  }

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

  .biomarker-groups,
  .biomarker-groups.compact {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 72px 0;
  }

  .test-card {
    padding: 24px;
  }

  .test-topline {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-inner {
    flex-direction: column;
  }

    .site-credit {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .diviti-credit-logo {
    width: 132px;
  }
}

.hidden {
  display: none;
}

.success-hero {
  min-height: calc(100vh - 82px);
  display: flex;
  align-items: center;
}