/* ============================================
   SCIC — Stephenson Cardiac Imaging Centre
   Design System & Global Styles
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Barlow:ital,wght@0,400;0,500;0,600;1,400&display=swap');

/* ---- CSS Variables ---- */
:root {
  /* One accent, on neutrals. */
  --blue: #00ABFF;
  --blue-dark: #0083CC;
  --blue-deep: #005a99;

  --ink:     #0A0E14;   /* headings, dark surfaces */
  --ink-2:   #3a4050;   /* body copy               */
  --ink-3:   #6b7280;   /* muted / meta            */
  --line:    #e5e7eb;   /* borders                 */
  --surface: #f7f8f9;   /* tinted panels           */
  --white:   #FFFFFF;

  --nav-height: 72px;
  --section-gap: 88px;

  --font: 'Barlow', system-ui, -apple-system, sans-serif;

  --radius: 8px;
  --radius-sm: 4px;

  --shadow: 0 1px 3px rgba(10,14,20,0.06);
  --transition: 0.2s ease;

  /* Aliases — keep the ~946 inline styles on the old names working while
     pass 2 converts them to components. Remove once the markup is clean. */
  --black: var(--ink);
  --grey: var(--ink-3);
  --grey-light: var(--surface);
  --grey-mid: var(--line);
  --off-white: var(--surface);
  --font-display: var(--font);
  --font-body: var(--font);
  --transition-slow: var(--transition);
  --shadow-sm: var(--shadow);
  --shadow-md: var(--shadow);
  --shadow-lg: var(--shadow);
  --shadow-blue: none;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--white);
  color: var(--black);
  line-height: 1.6;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---- Typography ---- */
h1, h2, h3, h4, h5 {
  font-family: var(--font);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
}
h1 { font-size: clamp(2.4rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.075rem; }
p { font-size: 1rem; color: var(--ink-2); line-height: 1.7; }
.lead { font-size: 1.15rem; font-weight: 400; color: var(--ink-3); line-height: 1.65; }

/* ---- Layout Utilities ---- */
.container { max-width: 1180px; margin: 0 auto; padding: 0 2rem; }
.container-wide { max-width: 1400px; margin: 0 auto; padding: 0 2rem; }
.section { padding: var(--section-gap) 0; }
.section--dark { background: var(--black); color: var(--white); }
.section--dark p { color: rgba(255,255,255,0.75); }
.section--blue { background: var(--blue); color: var(--white); }
.section--grey { background: var(--grey-light); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); row-gap: 1.5rem; column-gap: 3.5rem; }

.text-center { text-align: center; }
.text-blue { color: var(--blue); }
.text-grey { color: var(--grey); }

/* ---- Eyebrow ---- The only uppercase left on the site. ---- */
.eyebrow,
.section-label {
  display: block;
  font-weight: 600;
  font-size: 3rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.75rem;
}

/* ---- Section head: eyebrow + h2 + lead ---- */
.section-head {
  max-width: 640px;
  margin-bottom: 3.5rem;
}
.section-head p { margin-top: 0.75rem; }

/* ---- Section head with a trailing action (e.g. "All projects →") ---- */
.section-head--row {
  max-width: none;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 2rem;
}
.section-head--row > div { max-width: 640px; }

/* ============================================
   Components — these replace the inline-style
   patterns that were repeated across the pages.
   ============================================ */

/* ---- Muted small print (was: font-size:0.85rem;color:#9ca3af, ~40 sites) ---- */
.meta { font-size: 0.875rem; color: var(--ink-3); }

/* ---- Neutral tag (was: 5 colored category pills) ---- */
.tag {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--ink-3);
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-sm);
}
.tag-blue { color: var(--blue); background: rgba(0,171,255,0.07); border-color: rgba(0,171,255,0.25); }

/* ---- Tinted panel (was: background:var(--grey-light);border-radius:14px;padding:2.5rem) ---- */
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem;
}
.panel--dark {
  background: var(--ink);
  border-color: rgba(255,255,255,0.1);
  color: var(--white);
}
.panel--dark p { color: rgba(255,255,255,0.7); }

/* ---- Check list (was: 36 inline flex rows with a ✓ glyph) ---- */
.check-list { display: flex; flex-direction: column; gap: 0.7rem; }
.check-list li {
  position: relative;
  padding-left: 1.6rem;
  color: var(--ink-2);
  line-height: 1.6;
}
.check-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 13px;
  height: 10px;
  background: var(--blue);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 10'%3E%3Cpath d='M1 5l3.5 3.5L12 1' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat center / contain;
          mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 13 10'%3E%3Cpath d='M1 5l3.5 3.5L12 1' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat center / contain;
}
.section--dark .check-list li,
.panel--dark .check-list li { color: rgba(255,255,255,0.75); }

/* ---- Feature row: icon + title + copy (~20 sites) ---- */
.feature-row { display: flex; gap: 1rem; align-items: flex-start; }
.feature-row + .feature-row { margin-top: 1.75rem; }
.feature-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue);
}
.feature-row strong { display: block; margin-bottom: 0.2rem; font-weight: 600; color: var(--ink); }
.feature-row p { font-size: 0.95rem; }

/* ---- Stats ---- */
.stat-grid { display: flex; flex-wrap: wrap; gap: 3rem; }
.stat-value {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--ink);
}
.stat-label { font-size: 0.875rem; color: var(--ink-3); margin-top: 0.4rem; }

/* ---- Stat tile (bordered figure + caption) ---- */
.stat-tile {
  text-align: center;
  padding: 1.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.stat-tile-value {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1;
}
.stat-tile-label { font-size: 0.875rem; color: var(--ink-3); margin-top: 0.4rem; }

/* ---- Theme card (on dark sections) ---- */
.theme-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 1.75rem;
}
.theme-card--accent { border-color: rgba(0,171,255,0.3); }
.theme-card h4 { color: var(--white); margin-bottom: 0.5rem; }
.theme-card p { color: rgba(255,255,255,0.6); font-size: 0.95rem; }

/* ---- Publication row ---- */
.pub-list { display: flex; flex-direction: column; gap: 0.75rem; }
.pub-row {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}
.pub-year {
  flex-shrink: 0;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--blue);
  line-height: 1.2;
  text-align: center;
  min-width: 3.5rem;
}
.pub-year span { display: block; font-size: 0.75rem; color: var(--ink-3); font-weight: 400; }
.pub-row h4 { margin-bottom: 0.2rem; font-size: 1rem; }
.pub-row p { margin: 0; }

/* ---- Full-width dark call to action ---- */
.cta-band { background: var(--ink); padding: 5rem 0; }
.cta-band h2 { color: var(--white); max-width: 620px; margin: 0 auto; }
.cta-band p {
  color: rgba(255,255,255,0.6);
  max-width: 520px;
  margin: 1rem auto 2rem;
}

/* ---- Mission / vision / values strip ---- */
.mission-strip {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 3.5rem 0;
}
.mission-strip h3 {
  font-size: 1rem;
  color: var(--blue);
  margin-bottom: 0.5rem;
}
.mission-strip p { font-size: 0.95rem; }

/* ---- Research cards (shared by index.html and research.html) ---- */
.research-card {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
  text-align: left;
  width: 100%;
}
.research-card:hover { border-color: var(--blue); }
.research-card h4 { margin: 0.75rem 0 0.4rem; }
.research-card p { font-size: 0.925rem; color: var(--ink-3); }
.research-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}
.research-status { font-size: 0.875rem; color: var(--ink-3); }
.research-status.is-recruiting { color: var(--blue); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: var(--transition);
}

.btn-primary {
  background: var(--blue);
  color: var(--white);
}
.btn-primary:hover { background: var(--blue-dark); }

.btn-outline {
  background: transparent;
  color: var(--blue);
  border-color: var(--blue);
}
.btn-outline:hover { background: var(--blue); color: var(--white); }

.btn-white {
  background: var(--white);
  color: var(--ink);
}
.btn-white:hover { background: var(--surface); }

.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.35);
}
.btn-ghost:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.08);
}

/* ---- Navigation ---- */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: var(--transition);
}
#navbar.scrolled {
  background: rgba(10, 14, 20, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
#navbar .nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
#navbar .nav-logo {
  flex-shrink: 0;
}
#navbar .nav-logo img {
  height: 40px;
  width: auto;
  display: block;
}
#navbar .nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
#navbar .nav-links a,
#navbar .nav-links button {
  font-family: var(--font);
  font-weight: 500;
  font-size: 0.95rem;
  color: rgba(255,255,255,0.8);
  padding: 0.5rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
#navbar .nav-links a:hover,
#navbar .nav-links button:hover,
#navbar .nav-links a.active {
  color: var(--white);
  background: rgba(255,255,255,0.07);
}
#navbar .nav-links a.active { color: var(--blue); }

/* Dropdown */
.dropdown { position: relative; }
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(0);
  background: var(--black);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 0.5rem;
  padding-top: calc(0.5rem + 8px);
  min-width: 200px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  box-shadow: var(--shadow-lg);
}
/* Invisible bridge above the menu so hover is not lost crossing the gap */
.dropdown-menu::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 0;
  right: 0;
  height: 8px;
}
.dropdown:hover .dropdown-menu,
.dropdown.open .dropdown-menu {
  opacity: 1;
  pointer-events: all;
}
.dropdown-menu a {
  display: block;
  padding: 0.6rem 1rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8) !important;
  border-radius: 4px;
  transition: var(--transition);
}
.dropdown-menu a:hover {
  background: rgba(0,171,255,0.1);
  color: var(--blue) !important;
}

.nav-cta { margin-left: 1rem; white-space: nowrap; }

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
}

/* ---- Hero Section ---- */
.hero {
  position: relative;
  min-height: 78vh;
  display: flex;
  align-items: center;
  background: var(--ink);
  overflow: hidden;
  padding: calc(var(--nav-height) + 4rem) 0 5rem;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 72% 50%, rgba(0,171,255,0.10) 0%, transparent 70%),
    var(--ink);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}


.hero h1 {
  color: var(--white);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.1;
  margin-bottom: 1.25rem;
}
.hero h1 span {
  color: var(--blue);
  font-size: inherit;
}
.hero p {
  color: rgba(255,255,255,0.65);
  font-size: 1.15rem;
  max-width: 560px;
  margin-bottom: 2rem;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 3rem;
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.hero-stat-value {
  font-family: var(--font);
  font-size: 2rem;
  font-weight: 600;
  color: var(--white);
  line-height: 1;
  letter-spacing: -0.02em;
}
.hero-stat-label {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
  margin-top: 0.4rem;
}
.hero-visual {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 45%;
  opacity: 0.16;
  pointer-events: none;
}

/* ---- Cards ---- */
.card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid var(--line);
}
.card:hover { border-color: var(--blue); transform: scale(1.05); }
/* Mobile: scale when card is in viewport */
@media (hover: none) {
  .card.active { border-color: var(--blue); transform: scale(1.05); }
}
.card .theme-card-media { width: 100%; height: 200px; margin: 0; border: none; margin-bottom: 0; }
.card-body { padding: 1.75rem; }
.card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-bottom: 1rem;
  color: var(--blue);
}
.card h4 { margin-bottom: 0.5rem; }
.card-link {
  display: inline-block;
  margin-top: 1.25rem;
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--blue);
}
.card-link:hover { color: var(--blue-dark); }

/* Research Project Cards */
.project-card {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
  background: var(--ink);
}
.project-card-bg {
  position: absolute;
  inset: 0;
  transition: transform 0.5s ease;
}
.project-card:hover .project-card-bg { opacity: 0.9; }
.project-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.3) 60%, transparent 100%);
}
.project-card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.75rem;
  transform: translateY(0);
  transition: var(--transition);
}
.project-card-tag {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  color: var(--white);
  font-size: 0.8rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.6rem;
}
.project-card h4 {
  color: var(--white);
  font-size: 1.15rem;
}
.project-card p {
  color: rgba(255,255,255,0.75);
  font-size: 0.9rem;
  margin-top: 0.5rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.project-card:hover p { max-height: 100px; }
.project-card-arrow {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  opacity: 0;
  transform: scale(0.8);
  transition: var(--transition);
}
.project-card:hover .project-card-arrow {
  opacity: 1;
  transform: scale(1);
}

/* ---- Team Cards ---- */
.team-card { text-align: center; }
.team-avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: var(--surface) !important;   /* !important defeats the per-person inline gradients until pass 2 strips them */
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink-3);
  border: 1px solid var(--line);
  overflow: hidden;
}
.team-card h4 { font-size: 1.05rem; margin-bottom: 0.2rem; }
.team-card .role {
  font-size: 0.9rem;
  color: var(--ink-3);
}
.team-card .bio {
  font-size: 0.875rem;
  color: var(--ink-3);
  margin-top: 0.3rem;
}
.linkedin-icon {
  opacity: 0.7;
  transition: opacity 0.2s;
}
.team-card h4 a:hover .linkedin-icon {
  opacity: 1;
}

/* ---- Timeline ---- */
.timeline {
  position: relative;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--line);
}
.timeline-item {
  position: relative;
  padding: 0 0 3rem 2rem;
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.timeline-item.visible { opacity: 1; transform: translateX(0); }
.timeline-dot {
  position: absolute;
  left: -2.4rem;
  top: 0.45rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--blue);
}
.timeline-year {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--blue);
  margin-bottom: 0.4rem;
}
.timeline-item h4 { margin-bottom: 0.5rem; }

/* ---- Forms ---- */
.form-group { margin-bottom: 1.25rem; }
.form-label {
  display: block;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--ink-2);
  margin-bottom: 0.4rem;
}
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 1rem;
  color: var(--black);
  background: var(--white);
  transition: var(--transition);
  outline: none;
  appearance: none;
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(0,171,255,0.12);
}
.form-textarea { resize: vertical; min-height: 120px; }
.form-hint { font-size: 0.83rem; color: #9ca3af; margin-top: 0.35rem; }

/* Select arrow */
.form-select-wrap { position: relative; }
.form-select-wrap::after {
  content: '▾';
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--grey);
  pointer-events: none;
}

/* ---- History: paired photo + milestone track (about page) ---- */
.history-track {
  --track-gap: 5rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  column-gap: var(--track-gap);
  row-gap: 3rem;
  align-items: start;
  margin-top: 3rem;
  /* continuous timeline rule down the left edge of the text column */
  background-image: linear-gradient(var(--line), var(--line));
  background-repeat: no-repeat;
  background-size: 1px 100%;
  background-position: calc(50% + var(--track-gap) / 2) 0;
}
.history-track .timeline-item { padding-bottom: 0; }
.history-track .timeline-dot { left: -4px; }

.history-photo { margin: 0; }
.history-photo img,
.history-photo__frame {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  object-fit: cover;
}
.history-photo__frame {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--surface);
  border: 1px dashed var(--grey-mid);
  color: var(--ink-3);
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 1rem;
}
.history-photo figcaption {
  margin-top: 0.6rem;
  font-size: 0.83rem;
  line-height: 1.45;
  color: var(--ink-3);
}
.history-photo__hint {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.72rem;
  word-break: break-all;
}

/* ---- Callout / Info boxes ---- */
.callout {
  padding: 1.5rem;
  border-left: 2px solid var(--blue);
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.callout-blue {
  background: var(--blue);
  color: var(--white);
  border-radius: var(--radius);
  padding: 2.5rem;
  border: none;
}
.callout-blue p { color: rgba(255,255,255,0.9); }

/* ---- Tabs ---- */
.tab-nav {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2.5rem;
  overflow-x: auto;
}
.tab-btn {
  font-family: var(--font);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--ink-3);
  padding: 0.75rem 1.1rem;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: var(--transition);
  white-space: nowrap;
}
.tab-btn:hover { color: var(--ink); }
.tab-btn.active { color: var(--blue); border-bottom-color: var(--blue); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---- Accordion ---- */
.accordion-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
}
.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  transition: var(--transition);
}
.accordion-header:hover { background: var(--grey-light); }
.accordion-header h4 { font-size: 1rem; font-weight: 600; margin: 0; }
.accordion-icon {
  font-size: 1.25rem;
  color: var(--blue);
  transition: transform 0.3s;
  flex-shrink: 0;
}
.accordion-item.open .accordion-icon { transform: rotate(45deg); }
.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.accordion-body-inner { padding: 0 1.5rem 1.5rem; }

/* ---- Page Hero (internal pages) ---- */
.page-hero {
  background: var(--black);
  padding: calc(var(--nav-height) + 4rem) 0 4rem;
  position: relative;
  overflow: hidden;
}

.page-hero h1 { color: var(--white); }
.page-hero .lead { color: rgba(255,255,255,0.65); max-width: 640px; }
.page-hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 80% 50%, rgba(0,171,255,0.07) 0%, transparent 70%);
  pointer-events: none;
}

/* ---- Footer ---- */
#footer {
  background: var(--black);
  color: rgba(255,255,255,0.7);
  padding: 5rem 0 2rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}
#footer h5 {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--white);
  margin-bottom: 1rem;
}
#footer ul li { margin-bottom: 0.6rem; }
#footer ul li a {
  color: rgba(255,255,255,0.55);
  font-size: 0.9rem;
  transition: color 0.2s;
}
#footer ul li a:hover { color: var(--blue); }
.footer-logo { margin-bottom: 1.25rem; }
.footer-logo img { height: 36px; opacity: 0.9; }
.footer-desc { font-size: 0.9rem; line-height: 1.7; max-width: 300px; }
.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.83rem;
  color: rgba(255,255,255,0.35);
}
.footer-social { display: flex; gap: 0.75rem; }
.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
  transition: var(--transition);
}
.footer-social a:hover {
  border-color: rgba(255,255,255,0.5);
  color: var(--white);
}

/* ---- Animations ---- */
.fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* Pulse animation on blue dots */


/* MRI: Proton precession + T1 relaxation — animated via JS in main.js */

/* ---- Mobile Navigation ---- */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10,14,20,0.98);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding-top: 6rem;
  padding-bottom: 2rem;
  gap: 1.5rem;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.mobile-menu.open { transform: translateX(0); }
.mobile-menu a {
  font-family: var(--font);
  font-size: 1.5rem;
  font-weight: 500;
  color: rgba(255,255,255,0.8);
  transition: color 0.2s;
}
.mobile-menu a:hover { color: var(--blue); }
.mobile-menu-cta {
  margin-top: 0.5rem;
  padding: 0.7rem 1.6rem !important;
  background: var(--blue);
  color: var(--white) !important;
  border-radius: var(--radius-sm);
  font-size: 1rem !important;
}
.mobile-menu-cta:hover { background: var(--blue-dark); }
.mobile-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  color: white;
  font-size: 1.5rem;
  padding: 0.5rem;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  :root { --section-gap: 64px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .eyebrow,
  .section-label {
    font-size: 1.75rem;
    letter-spacing: 0.05em;
  }
  .hero-stats { gap: 1.5rem; flex-wrap: wrap; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
  #navbar .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .nav-cta { display: none !important; }
  .hero-visual { opacity: 0.07; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
}
/* Phones/tablets: one column — photo, then its milestone, then the next pair */
@media (max-width: 900px) {
  .history-track {
    grid-template-columns: 1fr;
    row-gap: 1.25rem;
    background-image: none;
  }
  .history-track .timeline-item { padding-left: 0; margin-bottom: 1.5rem; }
  .history-track .timeline-dot { display: none; }
}

@media (max-width: 480px) {
  h1 { font-size: 2.4rem; }
  .grid-4 { grid-template-columns: 1fr; }
  .eyebrow,
  .section-label {
    font-size: 1.3rem;
    letter-spacing: 0.04em;
  }
}

/* ---- Utility ---- */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-6 { margin-top: 3rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-6 { margin-bottom: 3rem; }
.gap-1 { gap: 0.5rem; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.w-full { width: 100%; }

/* ---- Page-specific: Clinical ---- */
.indication-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}
.indication-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
}
.indication-card:hover,
.indication-card.selected {
  border-color: var(--blue);
  background: rgba(0,171,255,0.04);
}
.indication-card.selected .check { opacity: 1; }
.check {
  display: inline-flex;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--blue);
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.7rem;
  float: right;
  opacity: 0;
  transition: opacity 0.2s;
}
.indication-card strong { display: block; margin-bottom: 0.3rem; font-size: 0.95rem; }
.indication-card p { font-size: 0.85rem; color: #6b7280; }

/* Referral form step indicator */
.steps {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 3rem;
}
.step {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
}
.step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid var(--line);
  color: var(--grey);
  flex-shrink: 0;
  transition: var(--transition);
}
.step.active .step-num, .step.done .step-num {
  background: var(--blue);
  border-color: var(--blue);
  color: white;
}
.step-label { font-size: 0.85rem; font-weight: 600; color: var(--grey); }
.step.active .step-label { color: var(--blue-dark); }
.step-line { flex: 1; height: 2px; background: var(--grey-mid); margin: 0 0.5rem; }
.step.done ~ .step-line { background: var(--blue); }

/* Generated protocol box */
.protocol-box {
  background: var(--ink);
  color: var(--white);
  border-radius: var(--radius);
  padding: 2rem;
}
.protocol-box h4 { color: var(--blue); margin-bottom: 1.25rem; }
.protocol-line {
  display: flex;
  justify-content: space-between;
  padding: 0.6rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  font-size: 0.9rem;
}
.protocol-line:last-child { border: none; }
.protocol-line .key { color: rgba(255,255,255,0.5); }
.protocol-line .val { font-weight: 600; color: white; }