:root {
  --ink: #f6f0e6;
  --muted: #a8b5af;
  --paper: #08110f;
  --paper-2: #0d1714;
  --green: #102f2a;
  --green-2: #050b0a;
  --teal: #2ca69a;
  --gold: #c7a15a;
  --line: rgba(218, 191, 132, 0.16);
  --shadow: 0 34px 90px rgba(0, 0, 0, 0.45);
  --serif: "Playfair Display", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 14% 0%, rgba(44, 166, 154, 0.2), transparent 34%),
    radial-gradient(circle at 86% 10%, rgba(199, 161, 90, 0.16), transparent 30%),
    linear-gradient(135deg, #050b0a 0%, #0a1714 52%, #07100f 100%);
  font-family: var(--sans);
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 18px clamp(20px, 4vw, 64px);
  color: #fff;
  transition: background 240ms ease, color 240ms ease, box-shadow 240ms ease;
}

.site-header.is-scrolled {
  color: #fff;
  background: rgba(5, 11, 10, 0.84);
  backdrop-filter: blur(18px);
  box-shadow: 0 1px 0 var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 0.82rem;
}

.brand strong,
.brand small {
  display: block;
  white-space: nowrap;
}

.brand strong {
  font-family: var(--serif);
  font-size: 1.02rem;
  letter-spacing: 0.01em;
}

.brand small {
  margin-top: 3px;
  font-size: 0.68rem;
  color: currentColor;
  opacity: 0.68;
}

.desktop-nav {
  display: flex;
  justify-content: center;
  gap: 26px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.desktop-nav a {
  opacity: 0.76;
  transition: opacity 180ms ease;
}

.desktop-nav a:hover { opacity: 1; }

.header-cta {
  justify-self: end;
  padding: 12px 18px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.menu-toggle {
  display: none;
  justify-self: end;
  width: 42px;
  height: 42px;
  border: 1px solid currentColor;
  border-radius: 50%;
  color: inherit;
  background: transparent;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 1px;
  margin: 5px auto;
  background: currentColor;
}

.mobile-menu {
  position: fixed;
  inset: 74px 14px auto;
  z-index: 19;
  display: none;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(8, 17, 15, 0.96);
  box-shadow: var(--shadow);
}

.mobile-menu.is-open { display: grid; gap: 16px; }

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.72fr);
  align-items: stretch;
  background:
    linear-gradient(90deg, rgba(13, 45, 40, 0.96), rgba(13, 45, 40, 0.82) 48%, rgba(13, 45, 40, 0.18)),
    url("./assets/surgery-team.jpg") center / cover;
  color: #fff;
}

.hero-copy {
  align-self: center;
  max-width: 760px;
  padding: 150px clamp(24px, 7vw, 96px) 80px;
}

.eyebrow,
.section-kicker {
  display: block;
  margin: 0 0 18px;
  color: var(--gold);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }

h1,
h2 {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: 0;
  line-height: 0.98;
}

h1 {
  max-width: 660px;
  margin-bottom: 24px;
  font-size: clamp(3rem, 5.7vw, 5.35rem);
}

h2 {
  font-size: clamp(2.25rem, 5vw, 4.6rem);
}

h3 {
  font-family: var(--serif);
  margin-bottom: 12px;
  font-size: 1.45rem;
}

.hero-lede {
  max-width: 590px;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(0.98rem, 1.4vw, 1.12rem);
  line-height: 1.7;
}

.hero-actions,
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.primary-btn {
  background: var(--gold);
  color: #15110a;
}

.secondary-btn {
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
}

.hero-stats {
  max-width: 700px;
  margin-top: 52px;
  color: rgba(255, 255, 255, 0.72);
}

.hero-stats span {
  width: 180px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 0.82rem;
  line-height: 1.45;
}

.hero-stats strong {
  display: block;
  margin-bottom: 3px;
  color: #fff;
  font-family: var(--serif);
  font-size: 2rem;
}

.hero-visual {
  position: absolute;
  right: clamp(20px, 4vw, 58px);
  bottom: 46px;
  width: min(31vw, 430px);
  min-width: 300px;
  height: min(72svh, 650px);
  margin: 0;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.56));
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.hero-card {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 22px;
  z-index: 2;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 18px;
  background: rgba(10, 20, 18, 0.58);
  backdrop-filter: blur(16px);
}

.hero-card span {
  display: block;
  margin-bottom: 6px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.hero-card strong {
  font-family: var(--serif);
  font-size: 1.3rem;
}

.credibility-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(218, 191, 132, 0.13);
}

.credibility-strip div {
  min-height: 104px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 20px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.015)),
    #08110f;
  color: #efe8da;
  font-weight: 700;
}

.credibility-strip img {
  width: 54px;
  height: 54px;
  object-fit: contain;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.94);
  padding: 4px;
}

.text-mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 1px solid var(--line);
  border-radius: 50%;
  font-family: var(--serif);
  color: var(--gold);
}

.section {
  padding: clamp(84px, 10vw, 150px) clamp(22px, 6vw, 92px);
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 8%, rgba(44, 166, 154, 0.15), transparent 34%),
    radial-gradient(circle at 88% 20%, rgba(199, 161, 90, 0.12), transparent 28%),
    linear-gradient(145deg, #07100f 0%, #0f211d 52%, #060b0a 100%);
}

.two-column {
  display: grid;
  grid-template-columns: 0.9fr 1fr;
  gap: clamp(34px, 8vw, 110px);
  align-items: start;
}

.two-column p,
.surgery-feature p,
.venture-card p,
.contact-section p {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.85;
}

.section-heading {
  max-width: 860px;
  margin-bottom: 52px;
}

.expertise-section,
.timeline-section {
  background:
    radial-gradient(circle at 78% 0%, rgba(199, 161, 90, 0.15), transparent 34%),
    linear-gradient(155deg, #08110f 0%, #122b26 46%, #050b0a 100%);
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(218, 191, 132, 0.14);
  border: 1px solid var(--line);
}

.expertise-grid article {
  min-height: 260px;
  padding: clamp(26px, 3vw, 38px);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.015)),
    rgba(6, 13, 12, 0.74);
}

.expertise-grid span {
  display: block;
  margin-bottom: 52px;
  color: var(--gold);
  font-weight: 800;
}

.expertise-grid p,
.publication-list small,
.timeline span {
  color: var(--muted);
  line-height: 1.65;
}

.surgery-feature {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  min-height: 680px;
  background: var(--green);
  color: #fff;
}

.surgery-feature img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.surgery-feature div {
  align-self: center;
  padding: clamp(44px, 7vw, 96px);
}

.surgery-feature p { color: rgba(255, 255, 255, 0.72); }

.ventures-section {
  background:
    radial-gradient(circle at 20% 20%, rgba(44, 166, 154, 0.16), transparent 34%),
    linear-gradient(145deg, #050b0a 0%, #11231f 55%, #07100e 100%);
}

.venture-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 24px;
}

.venture-card {
  overflow: hidden;
  border-radius: 26px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02)),
    #08110f;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.venture-card img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

.venture-card div {
  padding: 30px;
}

.venture-card span,
.publication-list time,
.timeline time {
  display: block;
  margin-bottom: 10px;
  color: var(--gold);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.logo-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.logo-card img {
  height: 260px;
  padding: 38px;
  object-fit: contain;
  background: rgba(255, 255, 255, 0.94);
}

.timeline {
  display: grid;
  gap: 1px;
  background: rgba(218, 191, 132, 0.14);
  border: 1px solid var(--line);
}

.timeline div {
  display: grid;
  grid-template-columns: 170px 1fr 1fr;
  gap: 24px;
  padding: 26px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.015)),
    rgba(6, 13, 12, 0.74);
}

.timeline strong {
  font-family: var(--serif);
  font-size: 1.18rem;
}

.research-section {
  color: #fff;
  background:
    radial-gradient(circle at 84% 16%, rgba(199, 161, 90, 0.16), transparent 32%),
    linear-gradient(145deg, #050b0a 0%, #0f2a25 48%, #030706 100%);
}

.publication-list {
  display: grid;
  gap: 1px;
  background: rgba(255, 255, 255, 0.12);
}

.publication-list article {
  display: grid;
  grid-template-columns: 90px 1fr 240px;
  gap: 20px;
  padding: 24px 0;
  background: rgba(5, 11, 10, 0.88);
}

.publication-list span {
  font-family: var(--serif);
  font-size: 1.18rem;
}

.contact-section {
  display: grid;
  grid-template-columns: 1fr 0.72fr;
  gap: 48px;
  padding: clamp(84px, 10vw, 150px) clamp(22px, 6vw, 92px);
  background:
    radial-gradient(circle at 18% 12%, rgba(44, 166, 154, 0.18), transparent 34%),
    radial-gradient(circle at 80% 30%, rgba(199, 161, 90, 0.13), transparent 28%),
    linear-gradient(145deg, #07100f 0%, #102620 48%, #050b0a 100%);
}

.contact-section h2 {
  max-width: 800px;
}

.contact-card {
  align-self: start;
  display: grid;
  gap: 14px;
  padding: 28px;
  border-radius: 24px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.02)),
    rgba(6, 13, 12, 0.82);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.contact-card a:not(.primary-btn) {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  color: #efe8da;
  font-weight: 700;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 34px clamp(22px, 6vw, 92px);
  color: rgba(255, 255, 255, 0.72);
  background: var(--green-2);
  font-size: 0.88rem;
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }
  .desktop-nav,
  .header-cta { display: none; }
  .menu-toggle { display: block; }
  .hero {
    grid-template-columns: 1fr;
  }
  .hero-visual {
    position: relative;
    right: auto;
    bottom: auto;
    width: auto;
    min-width: 0;
    height: 500px;
    margin: 0 22px 40px;
  }
  .credibility-strip,
  .expertise-grid,
  .venture-grid,
  .contact-section,
  .surgery-feature,
  .two-column {
    grid-template-columns: 1fr;
  }
  .timeline div,
  .publication-list article {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 640px) {
  .brand small { display: none; }
  .hero-copy {
    padding-top: 128px;
  }
  h1 {
    font-size: 3.25rem;
  }
  .credibility-strip div {
    justify-content: flex-start;
  }
  .hero-stats span {
    width: 100%;
  }
  .surgery-feature {
    min-height: auto;
  }
  .surgery-feature img {
    max-height: 520px;
  }
  footer {
    flex-direction: column;
  }
}