:root {
  --ink: #0d1b2a;
  --muted: #566574;
  --line: #dde4e9;
  --bg: #fbfcfc;
  --soft: #f1f4f6;
  --accent: #0b7a75;
  --accent-ink: #06544f;
  --dark: #0b1620;
  --dark-line: #1d3142;
  --on-dark: #e8eff3;
  --dark-muted: #93a6b4;
  --glow: #44c9c0;
  --maxw: 1080px;
  --radius: 14px;
  --font: "Manrope", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); }
a:hover { color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: 24px; }

.skip-link { position: absolute; inset-inline-start: -999px; top: 0; background: var(--ink); color: #fff; padding: 10px 16px; z-index: 100; }
.skip-link:focus { inset-inline-start: 12px; top: 12px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.65rem 1.25rem; border-radius: 999px; border: 1px solid transparent;
  font: inherit; font-weight: 600; font-size: 0.92rem; text-decoration: none; white-space: nowrap;
  transition: background-color .15s, border-color .15s, color .15s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-ink); color: #fff; }
.btn-ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); }
.btn-sm { padding: 0.45rem 0.95rem; font-size: 0.85rem; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251, 252, 252, 0.92);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; gap: 24px; min-height: 64px; }
.brand { font-weight: 800; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; white-space: nowrap; }
.brand:hover { color: var(--ink); }
.header-logo { display: flex; padding-inline-start: 18px; border-inline-start: 1px solid var(--line); }
.header-logo img { height: 30px; width: auto; }
.main-nav { margin-inline-start: auto; }
.main-nav ul { list-style: none; display: flex; gap: 24px; margin: 0; padding: 0; }
.main-nav a { color: var(--muted); text-decoration: none; font-size: 0.92rem; font-weight: 500; }
.main-nav a:hover { color: var(--ink); }
.header-cta { display: flex; align-items: center; gap: 8px; }

/* Hero */
.hero { padding: 72px 0 56px; }
.hero-grid { display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 64px; align-items: center; }
.hero h1 {
  font-size: clamp(2.5rem, 5.6vw, 4rem); line-height: 1.05; letter-spacing: -0.03em;
  font-weight: 800; margin: 0 0 14px;
}
.hero .role { font-size: 1.15rem; font-weight: 600; color: var(--accent); margin: 0 0 18px; }
.hero .lede { font-size: 1.08rem; color: var(--muted); max-width: 50ch; margin: 0 0 28px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; }
.portrait {
  width: 100%; height: auto; max-width: 320px; aspect-ratio: 1 / 1; object-fit: cover; object-position: center;
  border-radius: var(--radius); border: 1px solid var(--line); background: #fff; margin-inline-start: auto;
}
.facts {
  list-style: none; margin: 56px 0 0; padding: 24px 0 0; border-top: 1px solid var(--line);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.facts strong { display: block; font-size: 1rem; font-weight: 700; line-height: 1.3; margin-bottom: 2px; }
.facts span { color: var(--muted); font-size: 0.88rem; line-height: 1.4; display: block; }

/* Sections */
.section { padding: 72px 0; }
.section h2 { font-size: clamp(1.6rem, 3.2vw, 2.15rem); line-height: 1.2; letter-spacing: -0.02em; font-weight: 800; margin: 0 0 12px; }
.section .lead { color: var(--muted); max-width: 54ch; margin: 0 0 36px; }

.focus-list { list-style: none; margin: 8px 0 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; column-gap: 56px; }
.focus-list li { border-top: 1px solid var(--line); padding: 20px 0 24px; }
.focus-list h3 { margin: 0 0 4px; font-size: 1.08rem; font-weight: 700; }
.focus-list p { margin: 0; color: var(--muted); font-size: 0.96rem; }

/* Procedures: dark "viewer" band */
.viewer { background: var(--dark); color: var(--on-dark); }
.viewer h2 { color: #fff; }
.viewer .lead { color: var(--dark-muted); }
.viewer :focus-visible { outline-color: var(--glow); }
.tiles { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr; gap: 16px; }
.tile { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); align-items: center; border: 1px solid var(--dark-line); border-radius: var(--radius); overflow: hidden; background: #0f1d29; }
.tile > div:not(.diagram), .tile .text { padding: 24px 32px; }
.tile .diagram { margin: 0; }
.tile .diagram svg { display: block; width: 100%; max-width: none; height: auto; border-radius: 0; }
.tile h3 { margin: 0 0 6px; font-size: 1.2rem; font-weight: 700; color: #fff; }
.tile p { margin: 0; font-size: 0.98rem; color: var(--dark-muted); line-height: 1.55; }

/* Diagram palette (dark) */
.d-bg { fill: #0f1d29; }
.d-tissue { fill: #172a3a; }
.d-skin { stroke: #587083; stroke-width: 2; fill: none; }
.d-organ { fill: #1d4a4b; stroke: var(--glow); stroke-width: 2; }
.d-lesion { fill: #e8b95a; stroke: #f5d792; stroke-width: 1.5; }
.d-fluid { fill: #4a90c2; opacity: 0.55; }
.d-bowel { fill: #1b3a3d; stroke: var(--glow); stroke-width: 1.5; }
.d-needle { stroke: #fff; stroke-width: 2.5; stroke-linecap: round; fill: none; }
.d-hub { stroke: #fff; stroke-width: 6; stroke-linecap: round; fill: none; }
.d-tube { stroke: #fff; stroke-width: 2; fill: none; stroke-linecap: round; }
.d-probe { fill: #cbd6de; }
.d-beam { fill: rgba(68, 201, 192, 0.12); stroke: var(--glow); stroke-width: 1; stroke-dasharray: 4 3; }
.diagram svg [fill="#eef2f5"] { fill: #172a3a; }
.diagram svg [fill="#fff"] { fill: #0f1d29; }
.diagram svg [stroke="#9fb2bf"] { stroke: #587083; }

/* Credentials */
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.cols h3 { margin: 0 0 8px; font-size: 1.08rem; font-weight: 700; }
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li { display: grid; grid-template-columns: 7rem 1fr; gap: 12px; padding: 12px 0; border-top: 1px solid var(--line); font-size: 0.96rem; }
.timeline .yr { color: var(--muted); font-weight: 600; font-variant-numeric: tabular-nums; }
.timeline p { margin: 0; }
.members { margin: 32px 0 0; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); max-width: 70ch; }

/* FAQ */
.faq { max-width: 760px; }
details.faq-item { border-top: 1px solid var(--line); }
details.faq-item:last-of-type { border-bottom: 1px solid var(--line); }
details.faq-item summary {
  list-style: none; cursor: pointer; padding: 18px 40px 18px 0; position: relative;
  font-weight: 600; font-size: 1.02rem;
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary::after {
  content: "+"; position: absolute; inset-inline-end: 4px; top: 50%; translate: 0 -50%;
  font-size: 1.4rem; font-weight: 400; color: var(--accent); transition: rotate .2s;
}
details.faq-item[open] summary::after { rotate: 45deg; }
details.faq-item p { margin: 0 0 20px; color: var(--muted); max-width: 64ch; }

/* Contact */
.contact { background: var(--soft); }
.contact-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: start; }
.contact-list { margin: 0; padding: 0; list-style: none; }
.contact-list li { padding: 14px 0; border-top: 1px solid var(--line); font-size: 0.96rem; }
.contact-list li:first-child { border-top: none; padding-top: 0; }
.contact-list .label { display: block; color: var(--muted); font-size: 0.82rem; margin-bottom: 2px; }
.contact-list a { font-weight: 600; word-break: break-word; }
.disclaimer { margin: 48px 0 0; padding-top: 20px; border-top: 1px solid var(--line); font-size: 0.82rem; color: var(--muted); max-width: 72ch; }

/* Footer */
.site-footer { padding: 28px 0; font-size: 0.85rem; color: var(--muted); border-top: 1px solid var(--line); }
.site-footer .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px 24px; flex-wrap: wrap; }
.site-footer img { height: 30px; width: auto; }
.site-footer p { margin: 0; }
.site-footer a { color: var(--muted); }

@media (max-width: 960px) {
  .main-nav { display: none; }
  .header-cta { margin-inline-start: auto; }
  .hero { padding: 48px 0 40px; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .portrait { max-width: 240px; margin-inline-start: 0; order: -1; }
  .facts { grid-template-columns: 1fr 1fr; margin-top: 40px; }
  .cols, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .section { padding: 56px 0; }
}
@media (max-width: 640px) {
  .header-logo { display: none; }
  .site-header .wrap { gap: 12px; }
  .focus-list { grid-template-columns: 1fr; }
  .timeline li { grid-template-columns: 6rem 1fr; }
  .header-cta .btn-primary { padding-inline: 0.8rem; }
}
@media (max-width: 480px) {
  .facts { grid-template-columns: 1fr; gap: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}
@media (max-width: 520px) {
  .brand { font-size: 0.95rem; }
}
/* Use a photo instead of a diagram: <div class="diagram"><img src="images/your-photo.jpg" alt="..."></div> */
.tile .diagram img { display: block; width: 100%; height: auto; aspect-ratio: 12 / 7; object-fit: cover; }
@media (max-width: 640px) { .tile { grid-template-columns: 1fr; } .tile .text { padding: 18px 20px 22px; } }

/* Contact notes */
.alt { margin: 16px 0 0; font-size: 0.88rem; color: var(--muted); }
.contact-list .note { display: block; font-size: 0.88rem; color: var(--muted); font-weight: 400; }