/* ==========================================================================
   WARMUP™ CLINICAL MEDICAL STYLESHEET
   Light Medical Theme • Viewport Centered • 100% Grounded Clinical Evidence
   ========================================================================== */

:root {
  /* Brand Medical Palette */
  --primary-navy: #16336B;
  --primary-hover: #0F2552;
  --medical-blue: #0284C7;
  --medical-blue-light: #E0F2FE;
  --medical-blue-subtle: #F0F9FF;
  --therapeutic-warm: #EA580C;
  --therapeutic-red: #DC2626;
  --therapeutic-subtle: #FEF2F2;
  --clinical-green: #16A34A;
  --clinical-green-light: #DCFCE7;

  /* Surfaces & Neutrals */
  --bg-white: #FFFFFF;
  --bg-subtle: #F8FAFC;
  --bg-muted: #F1F5F9;
  --border-light: #E2E8F0;
  --border-medium: #CBD5E1;
  --text-main: #0F172A;
  --text-body: #334155;
  --text-muted: #64748B;
  --text-light: #94A3B8;

  /* Layout & Spacing */
  --header-height: 72px;
  --container-max: 1200px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 9999px;

  /* Elevated Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-card: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.03);

  /* Fonts */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-white);
  color: var(--text-body);
  line-height: 1.55;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

a {
  color: var(--medical-blue);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--primary-navy);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Global Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Section Framing & Viewport Alignment */
.section {
  padding: 56px 0;
  scroll-margin-top: var(--header-height);
  position: relative;
}

@media (min-height: 780px) and (min-width: 1024px) {
  .section {
    min-height: calc(100vh - var(--header-height));
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
}

.bg-light {
  background-color: var(--bg-subtle);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-header {
  max-width: 760px;
  margin: 0 auto 36px auto;
}

.text-center {
  text-align: center;
}

.section-tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary-navy);
  background-color: var(--medical-blue-subtle);
  border: 1px solid var(--medical-blue-light);
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.1rem;
  margin-bottom: 12px;
  color: var(--text-main);
}

.section-lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(22, 51, 107, 0.25);
}

.btn-secondary {
  background-color: #FFFFFF;
  color: var(--text-main);
  border-color: var(--border-medium);
}

.btn-secondary:hover {
  background-color: var(--bg-muted);
  color: var(--primary-navy);
  border-color: var(--text-muted);
}

.btn-lg {
  padding: 13px 26px;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.nav-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: box-shadow 0.2s ease;
}

.nav-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo img {
  height: 42px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 28px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-body);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary-navy);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--primary-navy);
  border-radius: 2px;
}

.nav-cta {
  display: flex;
  align-items: center;
}

.hamburger-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

.hamburger-btn .bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-main);
  border-radius: 2px;
  transition: all 0.2s ease;
}

/* Mobile Drawer Menu */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -320px;
  width: 290px;
  height: 100%;
  background-color: #FFFFFF;
  z-index: 1100;
  box-shadow: var(--shadow-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: right 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-drawer.open {
  right: 0;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 20px;
}

.drawer-header img {
  height: 34px;
  width: auto;
}

.drawer-close {
  background: none;
  border: none;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
}

.drawer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: auto;
}

.drawer-links a {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  display: block;
  padding: 6px 0;
}

.drawer-cta {
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
}

.drawer-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(2px);
  z-index: 1050;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.drawer-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

/* ==========================================================================
   SECTION 1: HERO
   ========================================================================== */
.hero-section {
  padding: 40px 0 56px 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
}

.clinical-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--medical-blue-subtle);
  border: 1px solid var(--medical-blue-light);
  color: var(--medical-blue);
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--clinical-green);
  box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.2);
}

.hero-title {
  font-size: 2.65rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.15;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 1.08rem;
  color: var(--text-body);
  line-height: 1.65;
  margin-bottom: 24px;
}

.hero-cta-group {
  display: flex;
  gap: 14px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.hero-feature-tags {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
}

.feat-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
}

.feat-tag svg {
  color: var(--clinical-green);
  flex-shrink: 0;
}

/* Right Schematic Card */
.medical-schematic-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  position: relative;
}

.card-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background-color: var(--bg-subtle);
  border-bottom: 1px solid var(--border-light);
}

.schematic-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.live-indicator {
  width: 6px;
  height: 6px;
  background-color: var(--clinical-green);
  border-radius: 50%;
}

.btn-toggle-vein {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: #FFFFFF;
  border: 1px solid var(--border-medium);
  padding: 5px 10px;
  font-size: 0.76rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  color: var(--therapeutic-red);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-toggle-vein:hover {
  background-color: var(--therapeutic-subtle);
  border-color: var(--therapeutic-red);
}

.btn-toggle-vein.inactive {
  color: var(--text-muted);
  border-color: var(--border-light);
}

/* Illustration Stage */
.illustration-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 860 / 626;
  background-color: #FCFDFE;
  display: flex;
  align-items: center;
  justify-content: center;
}

.schematic-grid {
  position: absolute;
  inset: 0;
  background-size: 24px 24px;
  background-image: 
    linear-gradient(to right, rgba(226, 232, 240, 0.45) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(226, 232, 240, 0.45) 1px, transparent 1px);
  pointer-events: none;
}

.arm-drawing {
  width: 100%;
  height: 100%;
  object-fit: contain;
  position: relative;
  z-index: 1;
}

/* Vein Pathway Overlay SVG */
.vein-svg-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.3s ease;
}

.vein-svg-layer.hidden {
  opacity: 0;
}

.vein-path-outer {
  stroke: var(--therapeutic-red);
  stroke-width: 6;
  stroke-linecap: round;
  fill: none;
  opacity: 0.92;
}

.vein-path-core {
  stroke: #FFFFFF;
  stroke-width: 2.2;
  stroke-linecap: round;
  fill: none;
  opacity: 0.95;
}

.vein-branch {
  stroke: var(--therapeutic-warm);
  stroke-width: 4;
  stroke-linecap: round;
  fill: none;
  opacity: 0.85;
}

.vein-target-dot {
  fill: #FFFFFF;
  stroke: var(--therapeutic-red);
  stroke-width: 3.5;
}

/* Hotspot Pins */
.hotspots-container {
  position: absolute;
  inset: 0;
  z-index: 5;
  pointer-events: none;
}

.hotspot-pin {
  position: absolute;
  pointer-events: auto;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: var(--primary-navy);
  color: #FFFFFF;
  border: 2px solid #FFFFFF;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transform: translate(-50%, -50%);
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.hotspot-pin:hover {
  transform: translate(-50%, -50%) scale(1.15);
  background-color: var(--medical-blue);
}

.hotspot-pin.active {
  background-color: var(--therapeutic-warm);
  transform: translate(-50%, -50%) scale(1.18);
  box-shadow: 0 0 0 5px rgba(234, 88, 12, 0.25);
}

.pin-number {
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1;
}

/* Hotspot Callout Panel */
.hotspot-callout-panel {
  padding: 14px 18px;
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-light);
}

.callout-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.callout-badge {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--primary-navy);
}

.callout-hint {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-light);
}

.callout-body {
  font-size: 0.88rem;
  color: var(--text-body);
  line-height: 1.5;
}

/* ==========================================================================
   SECTION 2: PHYSIOLOGICAL TRANSFORMATION (SIDE-BY-SIDE + SIMULATOR)
   ========================================================================== */
.transformation-wrapper {
  max-width: 1040px;
  margin: 0 auto;
}

/* Stage Selector / Simulator Bar */
.hemodynamic-simulator-bar {
  background-color: #FFFFFF;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
  gap: 12px;
}

.sim-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
}

.sim-buttons {
  display: flex;
  gap: 8px;
}

.btn-sim-stage {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-medium);
  color: var(--text-body);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-sim-stage:hover {
  background-color: var(--medical-blue-subtle);
  color: var(--primary-navy);
  border-color: var(--medical-blue);
}

.btn-sim-stage.active {
  background-color: var(--primary-navy);
  color: #FFFFFF;
  border-color: var(--primary-navy);
  box-shadow: 0 2px 6px rgba(22, 51, 107, 0.2);
}

/* Side-by-Side Dual Comparison Cards */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.compare-card {
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--border-medium);
  box-shadow: var(--shadow-card);
  padding: 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
}

.compare-card.card-before {
  border-color: #FCA5A5;
  background: linear-gradient(180deg, #FFFFFF 0%, #FEF2F2 100%);
}

.compare-card.card-after {
  border-color: #86EFAC;
  background: linear-gradient(180deg, #FFFFFF 0%, #F0FDF4 100%);
}

.compare-card-header {
  margin-bottom: 20px;
}

.state-badge {
  display: inline-block;
  padding: 5px 12px;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}

.badge-danger {
  background-color: #FEF2F2;
  color: var(--therapeutic-red);
  border: 1px solid #FCA5A5;
}

.badge-success {
  background-color: var(--clinical-green-light);
  color: var(--clinical-green);
  border: 1px solid #86EFAC;
}

.compare-card-title {
  font-size: 1.3rem;
  color: var(--text-main);
  margin-bottom: 4px;
}

.compare-card-subtitle {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Anatomical Lumen Graphic */
.lumen-visual-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px;
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.vessel-circle {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 6px solid;
  position: relative;
  transition: all 0.3s ease;
}

.vessel-circle.collapsed {
  border-color: #CBD5E1;
  background-color: #F1F5F9;
}

.vessel-circle.collapsed .inner-lumen {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: #64748B;
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.vessel-circle.dilated {
  border-color: #FDBA74;
  background-color: #FFEDD5;
}

.vessel-circle.dilated .inner-lumen {
  width: 66px;
  height: 66px;
  border-radius: 50%;
  background-color: var(--therapeutic-warm);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 12px rgba(234, 88, 12, 0.4);
}

.lumen-info h5 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.lumen-info p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Observations List */
.compare-factors {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
}

.compare-factors li {
  font-size: 0.9rem;
  color: var(--text-body);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.45;
}

.factor-icon {
  flex-shrink: 0;
  font-weight: bold;
  font-size: 0.95rem;
  margin-top: 1px;
}

.factor-icon.red {
  color: var(--therapeutic-red);
}

.factor-icon.green {
  color: var(--clinical-green);
}

/* ==========================================================================
   SECTION 3: ANATOMY & CLINICAL ENGINEERING
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 1040px;
  margin: 0 auto;
}

.feature-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.feature-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature-icon-wrapper.blue {
  background-color: var(--medical-blue-subtle);
  color: var(--medical-blue);
  border: 1px solid var(--medical-blue-light);
}

.feature-icon-wrapper.orange {
  background-color: #FFF7ED;
  color: var(--therapeutic-warm);
  border: 1px solid #FED7AA;
}

.feature-icon-wrapper.green {
  background-color: var(--clinical-green-light);
  color: var(--clinical-green);
  border: 1px solid #BBF7D0;
}

.feature-card h3 {
  font-size: 1.18rem;
  margin-bottom: 8px;
  color: var(--text-main);
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.55;
}

/* ==========================================================================
   SECTION 4: WORKFLOW (4 STEPS)
   ========================================================================== */
.workflow-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1100px;
  margin: 0 auto;
}

.step-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.2s ease;
}

.step-card:hover {
  transform: translateY(-2px);
}

.step-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.step-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--medical-blue-subtle);
  color: var(--primary-navy);
  border: 1px solid var(--medical-blue-light);
}

.step-time {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--therapeutic-warm);
}

.step-card h4 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 0.88rem;
  color: var(--text-body);
  line-height: 1.5;
}

/* ==========================================================================
   SECTION 5: CLINICAL EVIDENCE (PEER-REVIEWED)
   ========================================================================== */
.evidence-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 1040px;
  margin: 0 auto 36px auto;
}

.evidence-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.evidence-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  flex-wrap: wrap;
  gap: 6px;
}

.journal-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--primary-navy);
  background-color: var(--medical-blue-subtle);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--medical-blue-light);
}

.doi-cite {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.evidence-card h4 {
  font-size: 1.08rem;
  margin-bottom: 6px;
  color: var(--text-main);
}

.study-authors {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.study-finding-box {
  background-color: var(--bg-subtle);
  border-left: 3px solid var(--medical-blue);
  padding: 10px 12px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.86rem;
  color: var(--text-body);
  line-height: 1.5;
  margin-top: auto;
}

.study-finding-box strong {
  color: var(--primary-navy);
}

/* Qualitative Benefit Trio (No fabricated numbers) */
.benefit-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1040px;
  margin: 0 auto;
}

.pillar-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  box-shadow: var(--shadow-sm);
}

.pillar-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-weight: bold;
}

.pillar-icon.blue {
  background-color: var(--medical-blue-subtle);
  color: var(--medical-blue);
}

.pillar-icon.orange {
  background-color: #FFF7ED;
  color: var(--therapeutic-warm);
}

.pillar-icon.green {
  background-color: var(--clinical-green-light);
  color: var(--clinical-green);
}

.pillar-content h5 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.pillar-content p {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* ==========================================================================
   SECTION 6: SAMPLE EVALUATION REQUEST
   ========================================================================== */
.sample-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 40px;
  max-width: 1040px;
  margin: 0 auto;
  align-items: start;
}

.sample-info-side {
  padding-right: 12px;
}

.sample-info-side h2 {
  font-size: 2rem;
  margin-bottom: 14px;
}

.sample-info-side p {
  font-size: 0.98rem;
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 24px;
}

.kit-contents-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.kit-contents-card h5 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary-navy);
  margin-bottom: 12px;
}

.kit-contents-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.kit-contents-card li {
  font-size: 0.88rem;
  color: var(--text-body);
  display: flex;
  align-items: center;
  gap: 8px;
}

.kit-contents-card li::before {
  content: '✓';
  color: var(--clinical-green);
  font-weight: bold;
}

.procurement-notice {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
  background-color: var(--bg-muted);
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--border-medium);
}

/* Form Card */
.form-card {
  background-color: #FFFFFF;
  border: 1.5px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.form-group-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-label {
  display: block;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  font-size: 0.92rem;
  font-family: inherit;
  color: var(--text-main);
  background-color: #FFFFFF;
  border: 1.5px solid var(--border-medium);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--medical-blue);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

/* Dropdown Clean Styling */
.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23334155' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 14px 14px;
  padding-right: 36px;
  cursor: pointer;
}

.form-select option {
  background-color: #FFFFFF;
  color: #0F172A;
  padding: 8px;
}

.form-textarea {
  resize: vertical;
  min-height: 70px;
}

.form-success-box {
  display: none;
  background-color: var(--clinical-green-light);
  border: 1.5px solid #86EFAC;
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
}

.success-check-icon {
  width: 48px;
  height: 48px;
  background-color: var(--clinical-green);
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin: 0 auto 14px auto;
}

.form-success-box h4 {
  color: #14532D;
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.form-success-box p {
  font-size: 0.9rem;
  color: #166534;
  line-height: 1.5;
  margin-bottom: 16px;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-light);
  padding: 40px 0 28px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 36px;
  margin-bottom: 28px;
}

.footer-brand img {
  height: 38px;
  width: auto;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
  max-width: 320px;
}

.footer-nav h5,
.footer-contact h5 {
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary-navy);
  margin-bottom: 14px;
}

.footer-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav a {
  font-size: 0.88rem;
  color: var(--text-body);
}

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

.footer-contact p {
  font-size: 0.88rem;
  color: var(--text-body);
  line-height: 1.5;
  margin-bottom: 6px;
}

.footer-bottom {
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-light);
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   RESPONSIVE DESIGN & MOBILE OPTIMIZATIONS
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

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

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

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

  .benefit-pillars {
    grid-template-columns: 1fr;
  }

  .sample-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .nav-links,
  .nav-cta {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }

  .hero-section {
    padding: 24px 0 40px 0;
  }

  /* Place interactive schematic on top on mobile */
  .hero-visual {
    order: -1;
    margin-bottom: 12px;
  }

  .hero-title {
    font-size: 1.95rem;
  }

  .hero-subtitle {
    font-size: 0.98rem;
  }

  .hero-feature-tags {
    grid-template-columns: 1fr;
  }

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

  .workflow-steps-grid {
    grid-template-columns: 1fr;
  }

  .form-group-grid {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: 1.65rem;
  }

  .section {
    padding: 44px 0;
  }
}