:root {
  --navy-950: #050b17;
  --navy-900: #071329;
  --blue-800: #153e9b;
  --blue-700: #1b52ca;
  --blue-600: #286be4;
  --blue-500: #3d7df0;
  --blue-300: #8eb7ff;
  --blue-100: #dce8ff;
  --silver-50: #f8f9fb;
  --silver-100: #edf0f4;
  --silver-200: #d6dce4;
  --silver-300: #bdc6d1;
  --silver-500: #758295;
  --ink: #0a1322;
  --muted: #596678;
  --white: #ffffff;
  --green: #41b779;
  --line: rgba(10, 19, 34, 0.14);
  --dark-line: rgba(255, 255, 255, 0.14);
  --content: 1200px;
  --radius: 10px;
  --sans: Inter, "Avenir Next", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", "Courier New",
    monospace;
  --shadow: 0 24px 70px rgba(5, 11, 23, 0.18);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 130px;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--silver-50);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.menu-open {
  overflow: hidden;
}

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

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

a {
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--blue-500);
  outline-offset: 4px;
}

::selection {
  background: var(--blue-600);
  color: var(--white);
}

/* 2. Utilities
   ------------------------------------------------------------------------ */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 12px 18px;
  background: var(--white);
  color: var(--ink);
  font-weight: 800;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(calc(100% - 40px), var(--content));
  margin-inline: auto;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  color: var(--blue-700);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 28px;
  height: 2px;
  background: currentColor;
  content: "";
}

.section {
  position: relative;
  padding-block: 112px;
  border-bottom: 1px solid var(--line);
}

.section-heading {
  max-width: 800px;
  margin-bottom: 64px;
}

.section-heading h2,
.section-title,
.policy h2,
.contact h2 {
  margin: 0;
  font-size: clamp(2.5rem, 5vw, 4.9rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 0.98;
}

.section-heading p:last-child {
  max-width: 660px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--green);
  font-weight: 700;
}

.status-indicator::before {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  content: "";
  box-shadow: 0 0 12px currentColor;
}

/* 3. Header / navigation
   ------------------------------------------------------------------------ */
.site-top {
  position: sticky;
  top: 0;
  z-index: 100;
}

.research-bar {
  padding: 9px 20px;
  background: var(--navy-950);
  color: var(--silver-200);
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.45;
  text-align: center;
  text-transform: uppercase;
}

.site-header {
  border-bottom: 1px solid var(--dark-line);
  background: rgba(7, 19, 41, 0.94);
  color: var(--white);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.navigation {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-links > a:not(.button) {
  color: var(--silver-200);
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: none;
}

.nav-links > a:not(.button):hover {
  color: var(--white);
}

.menu-button {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  min-height: 44px;
  border: 1px solid var(--dark-line);
  border-radius: 7px;
  background: transparent;
  color: var(--white);
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* 4. Buttons
   ------------------------------------------------------------------------ */
.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 20px;
  border: 1px solid var(--blue-600);
  border-radius: 7px;
  background: var(--blue-600);
  color: var(--white);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.045em;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  transition:
    border-color 180ms ease,
    background-color 180ms ease,
    color 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease;
}

.button:hover {
  border-color: var(--blue-500);
  background: var(--blue-500);
  box-shadow: 0 12px 30px rgba(40, 107, 228, 0.28);
  transform: translateY(-2px);
}

.button-light {
  border-color: var(--white);
  background: var(--white);
  color: var(--navy-900);
}

.button-light:hover {
  border-color: var(--blue-100);
  background: var(--blue-100);
  color: var(--navy-900);
}

.button-outline {
  border-color: rgba(255, 255, 255, 0.5);
  background: transparent;
  color: var(--white);
}

.button-outline:hover {
  border-color: var(--white);
  background: var(--white);
  color: var(--navy-900);
}

.button-dark-outline {
  border-color: var(--navy-900);
  background: transparent;
  color: var(--navy-900);
}

.button-dark-outline:hover {
  background: var(--navy-900);
  color: var(--white);
}

/* 5. Hero
   ------------------------------------------------------------------------ */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(
      circle at 81% 30%,
      rgba(61, 125, 240, 0.38),
      transparent 29%
    ),
    linear-gradient(
      135deg,
      var(--navy-950) 0%,
      var(--navy-900) 43%,
      #113783 100%
    );
  color: var(--white);
}

.hero::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  content: "";
  -webkit-mask-image: linear-gradient(to bottom, black, transparent 95%);
  mask-image: linear-gradient(to bottom, black, transparent 95%);
  pointer-events: none;
}

.hero::after {
  position: absolute;
  right: -180px;
  bottom: -300px;
  width: 620px;
  height: 620px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  content: "";
  box-shadow:
    0 0 0 90px rgba(255, 255, 255, 0.025),
    0 0 0 180px rgba(255, 255, 255, 0.02);
}

.hero-grid {
  position: relative;
  z-index: 2;
  min-height: 720px;
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(340px, 0.84fr);
  gap: clamp(50px, 8vw, 110px);
  align-items: center;
  padding-block: 92px;
}

.hero .eyebrow {
  color: var(--blue-300);
}

.hero h1 {
  max-width: 800px;
  margin: 0;
  font-size: clamp(3.4rem, 7vw, 7rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 0.95;
}

.hero h1 span {
  color: var(--blue-300);
}

.hero-copy {
  max-width: 690px;
  margin: 32px 0;
  color: var(--silver-200);
  font-size: clamp(1.05rem, 1.6vw, 1.24rem);
  line-height: 1.7;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-art {
  position: relative;
  width: min(100%, 480px);
  margin-inline: auto;
}

.hero-logo-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
  box-shadow:
    0 35px 90px rgba(0, 0, 0, 0.34),
    inset 0 1px rgba(255, 255, 255, 0.16);
  transform: rotate(1.5deg);
}

.hero-logo-frame img {
  width: 100%;
  height: auto;
}

.status-card {
  position: absolute;
  right: -22px;
  bottom: 42px;
  width: min(270px, 76%);
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 10px;
  background: rgba(5, 11, 23, 0.88);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.32);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.status-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  color: var(--silver-300);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-card strong {
  display: block;
  margin-top: 25px;
  font-size: 1rem;
}

.status-card p {
  margin: 7px 0 0;
  color: var(--silver-300);
  font-size: 0.78rem;
}

/* 6. Figures strip
   ------------------------------------------------------------------------ */
.trust-strip {
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.trust-item {
  min-height: 180px;
  padding: 35px 28px;
  border-right: 1px solid var(--line);
}

.trust-item:last-child {
  border-right: 0;
}

.trust-number {
  display: block;
  color: var(--blue-700);
  font-size: clamp(2.2rem, 3.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}

.trust-item h3 {
  margin: 18px 0 6px;
  font-size: 1rem;
  letter-spacing: -0.025em;
}

.trust-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

/* 7. Testing process
   ------------------------------------------------------------------------ */
.process {
  background: var(--silver-50);
}

.process-list {
  border-top: 1px solid var(--ink);
}

.process-item {
  display: grid;
  grid-template-columns: 80px minmax(200px, 0.7fr) 1.3fr;
  gap: 36px;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.process-number {
  color: var(--blue-700);
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 700;
}

.process-item h3 {
  margin: 0;
  font-size: 1.24rem;
  letter-spacing: -0.035em;
}

.process-item p {
  max-width: 690px;
  margin: 0;
  color: var(--muted);
}

/* 8. Certificates
   ------------------------------------------------------------------------ */
.evidence {
  overflow: hidden;
  background: var(--navy-900);
  color: var(--white);
}

.evidence::before {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at 12% 30%,
    rgba(40, 107, 228, 0.22),
    transparent 30%
  );
  content: "";
  pointer-events: none;
}

.evidence .container {
  position: relative;
  z-index: 2;
}

.evidence .eyebrow {
  color: var(--blue-300);
}

.evidence-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(50px, 9vw, 130px);
  align-items: center;
}

.evidence-copy h2 {
  margin: 0;
  font-size: clamp(2.6rem, 5vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 0.98;
}

.evidence-copy > p:not(.eyebrow) {
  margin: 26px 0 0;
  color: var(--silver-300);
}

.record-panel {
  margin: 0;
  border: 1px solid var(--dark-line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.045);
  box-shadow: var(--shadow);
}

.record-panel-header {
  padding: 17px 20px;
  border-bottom: 1px solid var(--dark-line);
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.record-content {
  padding: 25px;
}

.record-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--dark-line);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.record-row:last-child {
  border-bottom: 0;
}

.record-row span:first-child {
  color: var(--silver-300);
}

/* 9. Cards (catalogue, shipping)
   ------------------------------------------------------------------------ */
.catalogue {
  background: var(--silver-100);
}

.shipping {
  background: var(--white);
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.principle-card {
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.shipping .principle-card {
  background: var(--silver-50);
}

.principle-card span {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 50%;
  background: var(--blue-100);
  color: var(--blue-800);
  font-family: var(--mono);
  font-size: 0.67rem;
  font-weight: 800;
}

.principle-card h3 {
  margin: 24px 0 10px;
  font-size: 1.2rem;
  letter-spacing: -0.035em;
}

.principle-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* 10. Wholesale
   ------------------------------------------------------------------------ */
.wholesale {
  background: var(--silver-100);
}

.wholesale .evidence-grid {
  align-items: start;
}

.wholesale .button {
  margin-top: 30px;
}

/* 11. Research-use policy
   ------------------------------------------------------------------------ */
.policy {
  background: var(--white);
}

.policy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(55px, 9vw, 130px);
  align-items: start;
}

.policy-copy {
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.policy-copy + .policy-copy {
  margin-top: 18px;
}

.policy-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ink);
  list-style: none;
}

.policy-list li {
  display: flex;
  gap: 15px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.86rem;
  font-weight: 700;
  line-height: 1.5;
}

.policy-list li::before {
  flex: 0 0 auto;
  color: var(--blue-700);
  content: "—";
}

/* 12. FAQ
   ------------------------------------------------------------------------ */
.faq {
  background: var(--silver-50);
}

.faq-list {
  border-top: 1px solid var(--ink);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
  padding: 25px 0;
  cursor: pointer;
  list-style: none;
}

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

.faq-question {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
}

.faq-symbol {
  flex: 0 0 auto;
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--blue-700);
  transition: transform 180ms ease;
}

.faq-item[open] .faq-symbol {
  transform: rotate(45deg);
}

.faq-answer {
  max-width: 780px;
  margin: 0;
  padding: 0 50px 25px 0;
  color: var(--muted);
}

/* 13. Contact
   ------------------------------------------------------------------------ */
.contact {
  background: var(--white);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(55px, 9vw, 130px);
  align-items: start;
}

.contact-copy {
  max-width: 670px;
  margin: 26px 0 32px;
  color: var(--muted);
  font-size: 1.05rem;
}

.contact-details {
  margin: 0;
  border-top: 1px solid var(--ink);
}

.contact-row {
  display: grid;
  grid-template-columns: 135px 1fr;
  gap: 24px;
  margin: 0;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.contact-row dt {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.contact-row dd {
  margin: 0;
  font-size: 0.94rem;
  font-weight: 700;
}

.contact-row a {
  color: var(--blue-700);
  text-underline-offset: 4px;
}

/* 14. Footer
   ------------------------------------------------------------------------ */
.site-footer {
  padding-block: 64px 30px;
  background: var(--navy-950);
  color: var(--white);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 70px;
}

.footer-logo {
  width: min(100%, 220px);
  overflow: hidden;
  border: 1px solid var(--dark-line);
  border-radius: 8px;
}

.footer-logo img {
  width: 100%;
  height: auto;
}

.footer-disclaimer {
  max-width: 450px;
  margin: 24px 0 0;
  color: var(--silver-300);
  font-size: 0.78rem;
}

.footer-heading {
  margin: 0 0 18px;
  color: var(--silver-500);
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-links {
  display: grid;
  gap: 11px;
}

.footer-links a {
  width: fit-content;
  color: var(--silver-200);
  font-size: 0.86rem;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--white);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 25px;
  margin-top: 60px;
  padding-top: 25px;
  border-top: 1px solid var(--dark-line);
  color: var(--silver-500);
  font-family: var(--mono);
  font-size: 0.61rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* 15. Reveal animation (JS only; content is visible without JS)
   ------------------------------------------------------------------------ */
.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 600ms ease,
    transform 600ms ease;
}

.js .reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 16. Responsive
   ------------------------------------------------------------------------ */
@media (min-width: 981px) {
  .catalogue .principle-grid,
  .shipping .principle-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 980px) {
  .menu-button {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    height: calc(100vh - 100%);
    height: calc(100dvh - 100%);
    display: none;
    align-content: start;
    padding: 35px 24px;
    overflow-y: auto;
    background: var(--navy-900);
  }

  .nav-links.open {
    display: grid;
  }

  .nav-links > a:not(.button) {
    padding: 13px 0;
    border-bottom: 1px solid var(--dark-line);
    font-size: 1rem;
  }

  .nav-links .button {
    margin-top: 10px;
  }

  .hero-grid,
  .evidence-grid,
  .policy-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    min-height: auto;
    padding-block: 85px 115px;
  }

  .hero-art {
    width: min(100%, 520px);
  }

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

  .trust-item:nth-child(2) {
    border-right: 0;
  }

  .trust-item:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(calc(100% - 28px), var(--content));
  }

  .section {
    padding-block: 80px;
  }

  .navigation {
    min-height: 68px;
  }

  .hero h1 {
    font-size: clamp(3.2rem, 16vw, 5rem);
  }

  .status-card {
    right: 12px;
    bottom: 20px;
  }

  .process-item {
    grid-template-columns: 50px 1fr;
    gap: 20px;
  }

  .process-item p {
    grid-column: 2;
  }

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

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

@media (max-width: 520px) {
  .research-bar {
    font-size: 0.58rem;
  }

  .hero-actions,
  .hero-actions .button,
  .contact-actions,
  .contact-actions .button {
    width: 100%;
  }

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

  .trust-item {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .trust-item:last-child {
    border-bottom: 0;
  }

  .contact-row {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .principle-card {
    padding: 28px;
  }
}

/* 17. Reduced motion
   ------------------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}