/* ========================================
   RENAGEN BIOSCIENCES — Production Stylesheet
   ======================================== */

/* === BASE RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
  scroll-padding-top: 5rem;
}

body {
  min-height: 100dvh;
  line-height: 1.7;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

p { line-height: 1.75; }

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'], ol[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }

::selection {
  background: oklch(from var(--color-primary) l c h / 0.25);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }

a, button, [role='button'], [role='link'], input, textarea, select {
  transition: color var(--transition-interactive), background var(--transition-interactive), border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0;
}

.skip-link {
  position: absolute; top: -100%; left: 1rem; z-index: 1000;
  padding: 0.75rem 1.5rem; background: var(--color-primary); color: #fff;
  border-radius: var(--radius-md); font-weight: 600; text-decoration: none;
}
.skip-link:focus { top: 1rem; }


/* === DESIGN TOKENS === */
:root, [data-theme="light"] {
  --text-xs: clamp(0.8125rem, 0.75rem + 0.25vw, 0.9375rem);
  --text-sm: clamp(0.9375rem, 0.875rem + 0.35vw, 1.0625rem);
  --text-base: clamp(1.0625rem, 1rem + 0.25vw, 1.1875rem);
  --text-lg: clamp(1.1875rem, 1.0625rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.25rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.25rem + 2.5vw, 3.5rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Renagen palette */
  --color-bg: #ffffff;
  --color-surface: #f5f6f8;
  --color-surface-2: #eef0f3;
  --color-surface-offset: #f0f1f4;
  --color-divider: #dce0e6;
  --color-border: #c9ced6;

  --color-text: #1a1a2e;
  --color-text-muted: #5a5e6e;
  --color-text-faint: #9298a5;

  --color-primary: #0d5c6e;
  --color-primary-hover: #094a5a;
  --color-primary-active: #073d4a;
  --color-primary-light: #e8f2f5;

  --color-dark-section: #0b1e2d;
  --color-dark-section-text: #e2e8ee;
  --color-dark-section-muted: #8da0b5;

  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'DM Sans', 'Helvetica Neue', Arial, sans-serif;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 3px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 4px 16px rgba(26, 26, 46, 0.08);
  --shadow-lg: 0 12px 40px rgba(26, 26, 46, 0.12);

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* DARK MODE */
[data-theme="dark"] {
  --color-bg: #0e1117;
  --color-surface: #161a22;
  --color-surface-2: #1c2028;
  --color-surface-offset: #1a1e26;
  --color-divider: #272c36;
  --color-border: #333a46;

  --color-text: #d4d8e0;
  --color-text-muted: #8892a4;
  --color-text-faint: #5a6478;

  --color-primary: #3fa8bc;
  --color-primary-hover: #5bbdd0;
  --color-primary-active: #2e95a8;
  --color-primary-light: #1a2a30;

  --color-dark-section: #080e16;
  --color-dark-section-text: #d0dae6;
  --color-dark-section-muted: #6e8298;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0e1117;
    --color-surface: #161a22;
    --color-surface-2: #1c2028;
    --color-surface-offset: #1a1e26;
    --color-divider: #272c36;
    --color-border: #333a46;
    --color-text: #d4d8e0;
    --color-text-muted: #8892a4;
    --color-text-faint: #5a6478;
    --color-primary: #3fa8bc;
    --color-primary-hover: #5bbdd0;
    --color-primary-active: #2e95a8;
    --color-primary-light: #1a2a30;
    --color-dark-section: #080e16;
    --color-dark-section-text: #d0dae6;
    --color-dark-section-muted: #6e8298;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  }
}


/* === LAYOUT === */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}

.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
}

.section-alt {
  background: var(--color-surface);
}


/* === HEADER === */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

[data-theme="dark"] .site-header {
  background: rgba(14, 17, 23, 0.92);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  gap: var(--space-6);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}

.logo-mark { color: var(--color-primary); }
.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  letter-spacing: -0.01em;
}

/* Nav */
.main-nav ul {
  display: flex;
  gap: var(--space-8);
}

.main-nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.01em;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-primary);
  transition: width var(--transition-interactive);
}

.main-nav a:hover { color: var(--color-text); }
.main-nav a:hover::after { width: 100%; }

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

a.header-cta { display: none; }

@media (min-width: 1024px) {
  a.header-cta { display: inline-flex; }
  .mobile-menu-toggle { display: none; }
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (min-width: 768px) {
  .mobile-menu-toggle { display: none; }
}

/* Mobile Nav */
@media (max-width: 1023px) {
  .main-nav {
    position: fixed;
    top: 4rem;
    left: 0;
    right: 0;
    bottom: 0;
    height: calc(100vh - 4rem);
    height: calc(100dvh - 4rem);
    background-color: #ffffff;
    padding: var(--space-10) var(--space-8) var(--space-8);
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 150;
    overflow-y: auto;
  }

  [data-theme="dark"] .main-nav {
    background-color: #0e1117;
  }

  .main-nav.open { transform: translateX(0); }

  .main-nav ul {
    flex-direction: column;
    gap: var(--space-8);
  }

  .main-nav a {
    font-size: var(--text-xl);
    font-weight: 500;
    color: var(--color-text);
    display: block;
  }

  .main-nav a::after { display: none; }
}


/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  border: none;
  cursor: pointer;
  letter-spacing: 0.01em;
  transition: background var(--transition-interactive), color var(--transition-interactive), transform var(--transition-interactive), box-shadow var(--transition-interactive);
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  background: var(--color-primary-active);
  transform: translateY(0);
}

.btn-white {
  background: #ffffff;
  color: var(--color-dark-section);
}

.btn-white:hover {
  background: #f0f0f0;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: var(--text-base);
}

.btn-full { width: 100%; }


/* === BADGE === */
.badge {
  display: inline-block;
  padding: 0.375rem 1rem;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
}


/* === HERO === */
.hero {
  padding-top: calc(4rem + clamp(var(--space-16), 8vw, var(--space-24)));
  padding-bottom: clamp(var(--space-12), 6vw, var(--space-20));
  background: var(--color-bg);
}

.hero-inner {
  display: grid;
  gap: var(--space-12);
  align-items: center;
}

@media (min-width: 960px) {
  .hero-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
  }
}

.hero-content { max-width: 600px; }

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
  margin-top: var(--space-5);
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-top: var(--space-6);
  line-height: 1.7;
}

.hero .btn { margin-top: var(--space-8); }

.trust-bullets {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-8);
  margin-top: var(--space-8);
}

.trust-bullets li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.trust-bullets svg { color: var(--color-primary); flex-shrink: 0; }

.hero-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}


/* === STATS BAR === */
.stats-bar {
  background: var(--color-primary);
  padding-block: var(--space-8);
}

.stats-inner {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  text-align: center;
}

@media (min-width: 768px) {
  .stats-inner { grid-template-columns: repeat(4, 1fr); }
}

.stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.stat-label {
  display: block;
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.7);
  margin-top: var(--space-1);
  letter-spacing: 0.02em;
}


/* === SECTION HEADERS === */
.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section-label-light {
  color: rgba(255, 255, 255, 0.6);
}

.section h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.section-body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  line-height: 1.7;
  max-width: 60ch;
}

.section-note {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  margin-top: var(--space-10);
  font-style: italic;
}


/* === SECTION HEADER WITH IMAGE === */
.section-header-with-image {
  display: grid;
  gap: var(--space-10);
  align-items: center;
  margin-bottom: var(--space-12);
}

@media (min-width: 768px) {
  .section-header-with-image {
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-16);
  }
  .section-header-reverse {
    grid-template-columns: 0.8fr 1.2fr;
  }
  .section-header-reverse .section-header-text {
    order: 2;
  }
  .section-header-reverse .section-header-image {
    order: 1;
  }
}

.section-header-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.section-header-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}


/* === CARDS === */
.card-grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 600px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}

.card {
  padding: var(--space-8);
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-interactive);
}

[data-theme="dark"] .card {
  background: var(--color-surface);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
  opacity: 0.4;
  display: block;
  margin-bottom: var(--space-4);
}

.card h3 {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}


/* === BENEFIT BLOCKS === */
.benefit-grid {
  display: grid;
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

@media (min-width: 600px) {
  .benefit-grid { grid-template-columns: repeat(2, 1fr); }
}

.benefit-block {
  padding: var(--space-8);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-divider);
}

[data-theme="dark"] .benefit-block {
  background: var(--color-surface-2);
}

.benefit-block h3 {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.benefit-block p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}


/* === STEPS === */
.steps-grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 600px) {
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 960px) {
  .steps-grid { grid-template-columns: repeat(4, 1fr); }
}

.step-card {
  position: relative;
  padding: var(--space-6);
  border-left: 2px solid var(--color-divider);
  padding-left: var(--space-6);
}

.step-card::before {
  content: '';
  position: absolute;
  left: -5px;
  top: var(--space-6);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
}

.step-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
  display: block;
  margin-bottom: var(--space-3);
}

.step-card h3 {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.step-meta {
  font-weight: 400;
  color: var(--color-text-faint);
  font-size: var(--text-sm);
}

.step-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}


/* === COMPARISON TABLES === */
.table-wrapper {
  overflow-x: auto;
  margin-top: var(--space-10);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-divider);
}

.comparison-table {
  font-size: var(--text-sm);
  min-width: 600px;
}

.comparison-table thead {
  background: var(--color-surface);
}

[data-theme="dark"] .comparison-table thead {
  background: var(--color-surface-2);
}

.comparison-table th {
  padding: var(--space-4) var(--space-6);
  text-align: left;
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-divider);
  white-space: nowrap;
}

.comparison-table td {
  padding: var(--space-4) var(--space-6);
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-divider);
}

.comparison-table tbody tr:last-child td { border-bottom: none; }

.row-label {
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}

.highlight-col {
  background: var(--color-primary-light);
  color: var(--color-text) !important;
  font-weight: 500;
}


/* === BIOBANKING === */
.section-biobanking {
  background: var(--color-dark-section);
  color: var(--color-dark-section-text);
  position: relative;
  overflow: hidden;
}

.section-biobanking h2 {
  color: #ffffff;
}

.section-biobanking p {
  color: var(--color-dark-section-muted);
  max-width: 60ch;
}

.biobanking-content {
  position: relative;
  z-index: 2;
}

.biobanking-content .btn { margin-top: var(--space-8); }

.biobank-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

@media (min-width: 768px) {
  .biobank-stats { grid-template-columns: repeat(4, 1fr); }
}

.biobank-stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: #ffffff;
}

.biobank-stat-label {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-dark-section-muted);
  margin-top: var(--space-1);
}

.biobanking-image-accent {
  margin-top: var(--space-12);
  border-radius: var(--radius-lg);
  overflow: hidden;
  opacity: 0.35;
}

.biobanking-image-accent img {
  width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 1;
}


/* === PILOT PROGRAMME === */
.section-pilot {
  background: var(--color-primary-light);
}

[data-theme="dark"] .section-pilot {
  background: var(--color-surface);
}

.pilot-layout {
  display: grid;
  gap: var(--space-12);
  align-items: center;
}

@media (min-width: 768px) {
  .pilot-layout {
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-16);
  }
}

.pilot-details {
  margin-top: var(--space-6);
  list-style: none;
}

.pilot-details li {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-6);
  position: relative;
}

.pilot-details li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}

.exclusivity-callout {
  margin-top: var(--space-8);
  padding: var(--space-6);
  background: var(--color-bg);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
  text-align: center;
  border: 1px solid var(--color-divider);
}

[data-theme="dark"] .exclusivity-callout {
  background: var(--color-surface-2);
}

.pilot-content .btn { margin-top: var(--space-8); }

.pilot-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.pilot-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}


/* === CONTACT === */
.section-contact {
  background: var(--color-bg);
}

.contact-layout {
  display: grid;
  gap: var(--space-12);
}

@media (min-width: 768px) {
  .contact-layout {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
  }
}

.requirements-box {
  margin-top: var(--space-8);
  padding: var(--space-6);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-divider);
}

.requirements-box h3 {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.requirements-box ul {
  list-style: none;
}

.requirements-box li {
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
}

.requirements-box li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-primary);
}

.contact-image-wrapper {
  margin-top: var(--space-8);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.contact-image-wrapper img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* Form */
.contact-form {
  background: var(--color-surface);
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-divider);
  display: grid;
  gap: var(--space-5);
}

@media (min-width: 480px) {
  .contact-form {
    grid-template-columns: 1fr 1fr;
  }
  .form-group-full {
    grid-column: 1 / -1;
  }
  .contact-form .btn {
    grid-column: 1 / -1;
  }
  .contact-form .form-note {
    grid-column: 1 / -1;
  }
}

.form-group { display: flex; flex-direction: column; gap: var(--space-2); }

.form-group label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  font-size: var(--text-base);
  color: var(--color-text);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13, 92, 110, 0.12);
}

[data-theme="dark"] .form-group input:focus,
[data-theme="dark"] .form-group select:focus,
[data-theme="dark"] .form-group textarea:focus {
  box-shadow: 0 0 0 3px rgba(63, 168, 188, 0.2);
}

.form-group textarea { resize: vertical; min-height: 100px; }

.form-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-align: center;
}


/* === FOOTER === */
.site-footer {
  background: var(--color-surface);
  padding-block: var(--space-12);
  border-top: 1px solid var(--color-divider);
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-divider);
}

@media (min-width: 768px) {
  .footer-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-6);
}

.footer-nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-nav a:hover { color: var(--color-text); }

.footer-bottom {
  padding-top: var(--space-8);
}

.disclaimer {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.7;
  max-width: 80ch;
}

.legal {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-4);
}


/* === SCROLL REVEAL ANIMATIONS === */
.fade-in { opacity: 1; }

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 35%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}


/* === RESPONSIVE REFINEMENTS === */
@media (max-width: 767px) {
  .hero { padding-top: calc(4rem + var(--space-10)); }

  .hero h1 { font-size: clamp(1.75rem, 1rem + 3vw, 2.5rem); }

  .stats-inner { gap: var(--space-4); }
  .stat-value { font-size: var(--text-lg); }

  .section h2 { font-size: clamp(1.5rem, 1rem + 2.5vw, 2.25rem); }

  .section-header-with-image { gap: var(--space-6); }

  .contact-form { padding: var(--space-6); }
}

@media (max-width: 479px) {
  .container { padding-inline: var(--space-4); }
  .biobank-stats { grid-template-columns: 1fr 1fr; }
}


/* ========================================
   REFINEMENTS — v2 optimization pass
   ======================================== */

/* Global readability boosts */
.section-body {
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-text-muted);
  margin-top: var(--space-5);
}

.section-header-text h2 {
  margin-bottom: 0.25em;
}

.section-label {
  margin-bottom: var(--space-4);
}

/* More breathing room between section headers and card grids */
.section-header-with-image {
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}

/* Cards — larger padding, better hierarchy */
.card,
.benefit-block,
.step-card {
  padding: clamp(var(--space-6), 3vw, var(--space-10)) !important;
  line-height: 1.7;
}

.card h3,
.benefit-block h3,
.step-card h3 {
  font-size: clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  margin-bottom: var(--space-3);
  line-height: 1.3;
  letter-spacing: -0.005em;
}

.card p,
.benefit-block p,
.step-card p {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text-muted);
}

.card-number,
.step-number {
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem) !important;
  margin-bottom: var(--space-4) !important;
}

/* How It Works — connecting progress line + visual distinction */
#process .steps-grid {
  position: relative;
  gap: clamp(var(--space-6), 3vw, var(--space-8));
}

#process .step-card {
  position: relative;
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

#process .step-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

#process .step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-family: var(--font-display);
  font-size: 1.375rem !important;
  font-weight: 500;
  margin-bottom: var(--space-5) !important;
}

/* Connecting line between steps on desktop */
@media (min-width: 900px) {
  #process .steps-grid {
    position: relative;
  }
  #process .steps-grid::before {
    content: '';
    position: absolute;
    top: calc(clamp(var(--space-6), 3vw, var(--space-10)) + 1.5rem);
    left: 12%;
    right: 12%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary-light) 20%, var(--color-primary-light) 80%, transparent);
    z-index: 0;
    pointer-events: none;
  }
}

/* Tables — larger text, more padding, lighter feel */
.comparison-table {
  font-size: var(--text-sm);
  line-height: 1.65;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.comparison-table th,
.comparison-table td {
  padding: clamp(var(--space-4), 2vw, var(--space-5)) clamp(var(--space-5), 2.5vw, var(--space-6)) !important;
  vertical-align: top;
}

.comparison-table thead th {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
}

.comparison-table .row-label {
  font-weight: 600;
  color: var(--color-text);
}

.comparison-table td {
  color: var(--color-text-muted);
}

.comparison-table .highlight-col {
  background: var(--color-primary-light) !important;
  color: var(--color-primary) !important;
  font-weight: 500;
}

.comparison-table thead .highlight-col {
  background: var(--color-primary) !important;
  color: #fff !important;
}

.table-wrapper {
  margin-top: clamp(var(--space-10), 5vw, var(--space-16));
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-divider);
}

/* Requirements box — more premium */
.requirements-box {
  padding: clamp(var(--space-6), 3vw, var(--space-8));
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  margin-block: var(--space-8);
}

.requirements-box h3 {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  font-weight: 600;
}

.requirements-box ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.requirements-box li {
  font-size: var(--text-sm);
  line-height: 1.6;
  padding-left: var(--space-6);
  position: relative;
  color: var(--color-text);
}

.requirements-box li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-primary);
}

/* Contact form — stronger visual contrast */
.contact-form-wrapper {
  padding: clamp(var(--space-6), 3vw, var(--space-10));
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

[data-theme="dark"] .contact-form-wrapper {
  background: var(--color-surface);
}

.contact-form .form-group label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  padding: var(--space-4) var(--space-4) !important;
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-divider);
  background: var(--color-surface);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-light);
  outline: none;
}

.contact-form .btn-primary {
  margin-top: var(--space-4);
  font-size: var(--text-base);
  padding: 1rem 1.5rem;
}

/* Urgency headline above form */
.contact-urgency {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  padding: 0.4rem 0.9rem;
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-5);
}

/* Pilot exclusivity callout — bolder presence */
.exclusivity-callout {
  padding: var(--space-5) var(--space-6);
  background: var(--color-primary-light);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-primary);
  font-weight: 500;
  margin-block: var(--space-6);
}

[data-theme="dark"] .exclusivity-callout {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* Hero — slightly tighter on text, give more space below */
.hero h1 {
  line-height: 1.08;
  letter-spacing: -0.015em;
}

.hero-sub {
  font-size: clamp(1.125rem, 1rem + 0.5vw, 1.3125rem);
  line-height: 1.65;
  margin-top: var(--space-6);
  margin-bottom: var(--space-8);
}

.trust-bullets {
  margin-top: var(--space-8);
  gap: var(--space-4) var(--space-6) !important;
}

.trust-bullets li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Stats bar — larger labels */
.stats-bar .stat-value {
  font-size: clamp(1.75rem, 1.4rem + 1.5vw, 2.5rem);
}

.stats-bar .stat-label {
  font-size: var(--text-sm);
  line-height: 1.5;
  margin-top: var(--space-2);
}

/* Section note */
.section-note {
  font-size: var(--text-sm);
  margin-top: var(--space-10);
  text-align: center;
  color: var(--color-text-faint);
  font-style: italic;
  line-height: 1.6;
}

/* Biobank stats — larger numbers, better spacing */
.biobank-stats {
  margin-top: clamp(var(--space-10), 5vw, var(--space-16));
  gap: clamp(var(--space-6), 3vw, var(--space-10)) !important;
}

.biobank-stat-value {
  font-size: clamp(1.625rem, 1.4rem + 1vw, 2.25rem) !important;
  line-height: 1.15;
}

.biobank-stat-label {
  font-size: var(--text-sm) !important;
  line-height: 1.5;
  margin-top: var(--space-2);
}

/* Pilot details list — better spacing and weight */
.pilot-details {
  margin-block: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.pilot-details li {
  font-size: var(--text-base);
  line-height: 1.65;
  padding-left: var(--space-6);
  position: relative;
}

.pilot-details li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-primary);
}

/* The System image — softer, less dominant */
#system .section-header-image img {
  filter: saturate(0.85) brightness(1.02);
}

/* Biobank image — cleaner presence */
.biobanking-image-accent img {
  filter: saturate(0.8) brightness(1.05);
}


/* ========================================
   MOBILE OPTIMIZATION — v3 pass
   Target: <= 768px
   ======================================== */

@media (max-width: 768px) {

  /* --- Readability: bigger body text & generous line-height --- */
  body {
    font-size: 1.0625rem;
    line-height: 1.75;
  }

  p, li {
    font-size: 1rem;
    line-height: 1.7;
  }

  /* Section body text slightly bigger */
  .section-body {
    font-size: 1.0625rem;
    line-height: 1.7;
    margin-top: 1.25rem;
  }

  /* --- Vertical spacing between sections --- */
  .section {
    padding-block: clamp(3.5rem, 10vw, 5rem);
  }

  /* More air above/below major headings */
  h1, h2, h3 {
    letter-spacing: -0.01em;
  }

  .section-header-with-image,
  .section-header-text {
    margin-bottom: 2.25rem;
  }

  .section-header-text h2,
  .section-header h2 {
    margin-bottom: 1rem;
    line-height: 1.2;
  }

  .section-label {
    margin-bottom: 1rem;
    font-size: 0.8125rem;
    letter-spacing: 0.12em;
  }

  /* --- Hero mobile: stronger hierarchy --- */
  .hero {
    padding-top: clamp(3rem, 10vw, 4.5rem);
    padding-bottom: clamp(3rem, 10vw, 4.5rem);
  }

  .hero h1 {
    font-size: clamp(2.25rem, 8vw, 3rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 1.25rem;
  }

  .hero-sub {
    font-size: 1.0625rem;
    line-height: 1.65;
    margin-block: 1.25rem 2rem;
  }

  .badge {
    font-size: 0.75rem;
    letter-spacing: 0.12em;
  }

  .trust-bullets {
    margin-top: 2rem !important;
    gap: 0.875rem !important;
    flex-direction: column;
  }

  .trust-bullets li {
    font-size: 0.9375rem;
  }

  /* --- Cards: more padding, better breathing --- */
  .card,
  .benefit-block,
  .step-card {
    padding: 1.75rem 1.5rem !important;
  }

  .card h3,
  .benefit-block h3,
  .step-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    line-height: 1.3;
  }

  .card p,
  .benefit-block p,
  .step-card p {
    font-size: 0.9375rem;
    line-height: 1.7;
  }

  .card-grid,
  .benefits-grid,
  .steps-grid {
    gap: 1rem !important;
  }

  /* Hide desktop connecting line on mobile */
  #process .steps-grid::before {
    display: none;
  }

  #process .step-number {
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1.125rem !important;
    margin-bottom: 1rem !important;
  }

  /* --- Stats bar: larger on mobile --- */
  .stats-bar {
    padding-block: 2.5rem;
  }

  .stats-bar .stat-value,
  .biobank-stat-value {
    font-size: 1.75rem !important;
  }

  .stats-bar .stat-label,
  .biobank-stat-label {
    font-size: 0.9375rem !important;
    line-height: 1.45;
  }

  /* ===================================================
     TABLES -> STACKED COMPARISON CARDS on mobile
     Consolidated, conflict-free, no-overflow version
     =================================================== */

  .table-wrapper {
    border: none !important;
    box-shadow: none !important;
    background: transparent !important;
    border-radius: 0 !important;
    overflow: visible !important;
    margin-top: 2.25rem !important;
    padding: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  /* Nuke desktop table layout and turn every element into block */
  .comparison-table,
  .comparison-table thead,
  .comparison-table tbody,
  .comparison-table tr,
  .comparison-table th,
  .comparison-table td {
    display: block !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    box-sizing: border-box !important;
    border: 0 !important;
    padding: 0 !important;
    margin: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
    text-align: left !important;
    white-space: normal !important;
    word-break: break-word;
    overflow-wrap: break-word;
  }

  /* Hide the desktop header row entirely */
  .comparison-table thead,
  .comparison-table th {
    display: none !important;
  }

  /* Each row becomes a premium card */
  .comparison-table tbody tr {
    background: var(--color-surface) !important;
    border: 1px solid var(--color-divider) !important;
    border-radius: var(--radius-lg) !important;
    padding: 1.25rem !important;
    margin-bottom: 1rem !important;
    box-shadow: var(--shadow-sm) !important;
  }

  /* Feature name becomes the card title */
  .comparison-table tbody .row-label {
    font-family: var(--font-display) !important;
    font-size: 1.25rem !important;
    font-weight: 500 !important;
    color: var(--color-text) !important;
    padding: 0 0 0.875rem 0 !important;
    margin: 0 0 0.75rem 0 !important;
    border-bottom: 1px solid var(--color-divider) !important;
    line-height: 1.3 !important;
  }

  /* Traditional value (neutral) */
  .comparison-table tbody td[data-label]:not(.highlight-col) {
    padding: 0.75rem 0 0.25rem 0 !important;
    color: var(--color-text-muted) !important;
    font-size: 0.9375rem !important;
    line-height: 1.55 !important;
  }

  /* Renagen value (highlighted card-within-card) */
  .comparison-table tbody td.highlight-col {
    padding: 0.875rem 1rem !important;
    margin-top: 0.625rem !important;
    background: var(--color-primary-light) !important;
    color: var(--color-primary) !important;
    font-size: 1rem !important;
    font-weight: 500 !important;
    line-height: 1.5 !important;
    border-radius: var(--radius-md) !important;
  }

  /* Label prefix (TRADITIONAL / RENAGEN) */
  .comparison-table tbody td[data-label]::before {
    content: attr(data-label);
    display: block;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 0.375rem;
  }

  .comparison-table tbody td[data-label]:not(.highlight-col)::before {
    color: var(--color-text-faint);
  }

  .comparison-table tbody td.highlight-col::before {
    color: var(--color-primary);
    opacity: 0.75;
  }

  /* --- Buttons: bigger tap targets on mobile --- */
  .btn {
    padding: 1rem 1.5rem !important;
    font-size: 1rem !important;
    min-height: 52px;
  }

  .btn-lg {
    padding: 1.125rem 1.75rem !important;
    font-size: 1.0625rem !important;
    width: 100%;
    justify-content: center;
  }

  .hero .btn {
    width: 100%;
    justify-content: center;
  }

  /* --- Contact section: premium mobile feel --- */
  .contact-form-wrapper {
    padding: 1.75rem 1.25rem !important;
    border-radius: var(--radius-lg);
  }

  .contact-urgency {
    display: block;
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 0.75rem;
  }

  .contact-form {
    gap: 1.25rem;
  }

  .contact-form .form-row {
    grid-template-columns: 1fr !important;
    gap: 1.25rem !important;
  }

  .contact-form label {
    font-size: 0.75rem !important;
    margin-bottom: 0.5rem !important;
  }

  .contact-form input,
  .contact-form select,
  .contact-form textarea {
    padding: 0.875rem 1rem !important;
    font-size: 1rem;
    min-height: 52px;
    border-radius: var(--radius-md);
  }

  .contact-form textarea {
    min-height: 130px;
  }

  .contact-form .btn-primary {
    margin-top: 0.5rem;
    padding: 1.125rem 1.5rem !important;
    font-size: 1.0625rem !important;
    width: 100%;
  }

  /* Requirements box on mobile */
  .requirements-box {
    padding: 1.5rem 1.25rem;
    margin-block: 1.5rem;
  }

  .requirements-box li {
    font-size: 1rem;
    line-height: 1.55;
    padding-left: 1.5rem;
  }

  /* --- Biobanking dark section --- */
  .section-biobanking {
    padding-block: clamp(3.5rem, 10vw, 5rem);
  }

  .biobank-stats {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 1.5rem !important;
    margin-top: 2.5rem;
  }

  /* --- Pilot section --- */
  .pilot-details {
    gap: 0.75rem;
  }

  .pilot-details li {
    font-size: 1rem;
    line-height: 1.6;
  }

  .exclusivity-callout {
    padding: 1rem 1.25rem;
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-block: 1.5rem;
  }

  /* --- Section with image: stack cleanly --- */
  .section-header-with-image {
    display: flex !important;
    flex-direction: column !important;
    gap: 2rem !important;
  }

  .section-header-reverse {
    flex-direction: column !important;
  }

  .section-header-image img {
    border-radius: var(--radius-lg);
  }

  /* --- Navigation: mobile menu spacing --- */
  .nav-menu.active {
    padding: 2rem 1.5rem !important;
    gap: 1.5rem !important;
  }

  .nav-menu.active a {
    font-size: 1.125rem;
    padding: 0.75rem 0;
  }

  /* --- Footer --- */
  .footer {
    padding-block: 2.5rem;
  }

  .footer p, .footer li {
    font-size: 0.9375rem;
    line-height: 1.65;
  }

  /* Tighter paragraph widths so text scans faster */
  .section-body,
  .hero-sub {
    max-width: 42ch;
  }

  /* Section-specific: biobanking dark text on mobile */
  .section-biobanking .section-body {
    font-size: 1rem;
    line-height: 1.7;
    max-width: 100%;
  }
}

/* Smallest phones */
@media (max-width: 400px) {
  .hero h1 {
    font-size: 2rem;
  }

  .stats-bar {
    padding-inline: 1rem;
  }

  .biobank-stats {
    grid-template-columns: 1fr !important;
  }
}