:root {
  /* Primary Colors */
  --primary-blue: #3a6ea5;
  --secondary-navy: #1f3a4d;

  /* Background Colors */
  --bg-main: #f6f9fc;
  --bg-section: #eef4f8;
  --bg-card: #ffffff;

  /* Accent Colors */
  --accent-cyan: #5ec3e6;
  --accent-soft-blue: #a9d6e5;

  /* Text Colors */
  --text-heading: #102a43;
  --text-body: #334e68;
  --text-muted: #829ab1;

  /* UI & Border Colors */
  --border-divider: #d9e2ec;
  --bg-input: #f1f5f9;
  --shadow-color: rgba(16, 42, 67, 0.08);

  /* CTA & Button States */
  --btn-primary: #3a6ea5;
  --btn-primary-hover: #2c5e8a;
  --btn-secondary: #5ec3e6;
  --btn-secondary-hover: #46b2d8;

  /* Spacing & Layout */
  --navbar-height: 70px;
  --border-radius-lg: 16px;
  --border-radius-md: 8px;
  --border-radius-pill: 50px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family:
    "Inter",
    system-ui,
    -apple-system,
    sans-serif;
  background-color: var(--bg-main);
  color: var(--text-body);
  line-height: 1.6;
  overflow-x: hidden;
  /* Faster rendering for modern browsers */
  text-rendering: optimizeLegibility;
}

/* Rendering performance for long pages */
.specs-section,
.science-section,
.app-experience-section,
.tips-section,
.comparison-section,
.detailed-comparison-section,
.shipping-section,
.faq-section,
.disclaimer-section,
.privacy-section,
.security-section {
  content-visibility: auto;
  contain-intrinsic-size: 1px 500px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--text-heading);
  font-weight: 700;
  line-height: 1.2;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

ul {
  list-style: none;
}

/* --- Container --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* --- Navbar (Dynamic Island Style) --- */
.navbar-container {
  position: fixed;
  top: 20px;
  left: 0;
  width: 100%;
  z-index: 1002;
  display: flex;
  justify-content: center;
  padding: 0 20px;
  pointer-events: none;
}

.navbar {
  background: var(--bg-card); /* White surface */
  width: 100%;
  max-width: 900px;
  height: var(--navbar-height);
  border-radius: var(--border-radius-pill);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 30px;
  box-shadow:
    0 10px 40px -10px var(--shadow-color),
    0 0 0 1px var(--border-divider);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  pointer-events: auto;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  z-index: 2;
}

.nav-logo-img {
  height: 32px;
  width: auto;
  object-fit: contain;
  display: block;
}

/* Desktop Menu */
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-weight: 500;
  color: var(--text-body);
  position: relative;
  font-size: 0.95rem;
}

.nav-link:hover {
  color: var(--primary-blue);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 100%;
  height: 2px;
  background-color: var(--accent-cyan);
  transition: transform 0.3s ease;
  border-radius: 2px;
}

.nav-link:hover::after {
  transform: translateX(-50%) scaleX(1);
}

/* CTA Button in Nav */
.nav-cta {
  background-color: var(--btn-primary);
  color: white;
  padding: 10px 24px;
  border-radius: var(--border-radius-pill);
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 4px 12px rgba(58, 110, 165, 0.3);
}

.nav-cta:hover {
  background-color: var(--btn-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(58, 110, 165, 0.4);
}

/* Hamburger Menu */
.burger-menu {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  cursor: pointer;
  z-index: 1002;
}

.burger-line {
  height: 2px;
  width: 100%;
  background-color: var(--text-heading);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* Mobile Menu (Hidden by default) */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100dvh;
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 30px;
  transform: translateY(-100%);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 1001; /* Behind the navbar container container specifically, or handle via JS state */
  padding-top: 80px;
}

/* Fix z-index stacking for mobile: 
   We want the navbar pill to seemingly morph or the overlay to take over.
   Let's make a separate mobile wrapper.
*/

/* Mobile Responsive Styles */
/* Mobile Responsive Styles */
@media (max-width: 768px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .burger-menu {
    display: flex;
  }

  .navbar {
    padding: 0 20px;
    /* On mobile, maybe shrinking slightly or staying same width */
  }
}

/* Mobile Menu Active State */
.mobile-nav-overlay.active {
  transform: translateY(0);
}

.mobile-link {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-heading);
}

.mobile-link:hover {
  color: var(--primary-blue);
}

/* Body Spacer for fixed header */
.spacer {
  height: 120px;
}

/* --- Hero Section (Placeholder) --- */
.hero {
  text-align: center;
  background-color: var(--bg-section);
  padding: 80px 20px;
  border-radius: var(--border-radius-lg);
  margin: 20px auto;
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 40px;
}

/* --- Footer --- */
.footer {
  background-color: var(--secondary-navy);
  color: white;
  padding: 80px 0 30px;
  margin-top: 80px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 60px;
}

.footer-logo-img {
  height: 32px;
  width: auto;
  object-fit: contain;
  margin-bottom: 24px;
  filter: brightness(0) invert(1); /* Makes the black logo white for dark footer */
}

.footer-brand p {
  color: var(--text-muted); /* This might be too dark for dark bg */
  color: #829ab1; /* Adjusting for contrast */
  opacity: 0.8;
  line-height: 1.7;
}

.footer-links h3 {
  color: var(--accent-cyan);
  font-size: 1.1rem;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: #d9e2ec;
  font-size: 0.95rem;
}

.footer-links a:hover {
  color: var(--accent-cyan);
  padding-left: 5px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 30px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Burger Animation */
.burger-menu.active .burger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
  background-color: var(--primary-blue);
}
.burger-menu.active .burger-line:nth-child(2) {
  opacity: 0;
}
.burger-menu.active .burger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
  background-color: var(--primary-blue);
}

/* Extra Polish */
.navbar:hover {
  box-shadow:
    0 15px 35px -5px rgba(58, 110, 165, 0.15),
    0 0 0 1px var(--primary-blue);
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2rem;
  }
}

/* --- Optimized Hero Section --- */
.hero-section {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
  background: linear-gradient(135deg, var(--bg-section) 0%, #ffffff 100%);
  padding: 40px 30px;
  border-radius: 24px;
  margin: 0px auto;
  position: relative;
  overflow: hidden;
  min-height: auto;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: 8px 16px;
  background-color: white;
  color: var(--primary-blue);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 50px;
  width: fit-content;
  box-shadow: 0 2px 10px rgba(58, 110, 165, 0.1);
  border: 1px solid rgba(58, 110, 165, 0.2);
}

.hero-title {
  font-size: 2.5rem;
  line-height: 1.1;
  color: var(--text-heading);
  margin: 0;
}

/* Feature Grid inside Hero */
.hero-features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 0;
}

.feature-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  transition:
    transform 0.3s ease,
    background 0.3s ease;
}

.feature-card:hover {
  background: white;
  transform: translateX(5px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.feature-icon {
  min-width: 40px;
  height: 40px;
  background-color: var(--bg-input);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-blue);
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.5;
  margin: 0;
}

.feature-card strong {
  color: var(--text-heading);
}

/* Offer Box */
.hero-offer-box {
  margin-top: 20px;
  background: linear-gradient(135deg, white 0%, #f8fbff 100%);
  padding: 24px;
  border-radius: 16px;
  border: 1px solid var(--primary-blue);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  box-shadow: 0 8px 30px rgba(58, 110, 165, 0.12);
  position: relative;
  overflow: hidden;
}

.hero-offer-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--primary-blue);
}

.offer-details {
  flex: 1;
}

.offer-heading {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary-blue);
  margin-bottom: 4px;
}

.offer-sub {
  font-size: 0.95rem;
  color: var(--text-body);
  margin-bottom: 8px;
}

.promo-code {
  background-color: var(--secondary-navy);
  color: var(--accent-cyan);
  padding: 4px 8px;
  border-radius: 6px;
  font-family: monospace;
  font-weight: 700;
  letter-spacing: 1px;
  border: 1px dashed var(--accent-cyan);
  animation: promoPulse 2s infinite;
}

@keyframes promoPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(94, 195, 230, 0.4);
  }
  70% {
    box-shadow: 0 0 0 6px rgba(94, 195, 230, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(94, 195, 230, 0);
  }
}

.hero-guarantee {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-hero-primary {
  background-color: var(--primary-blue);
  color: white;
  padding: 16px 32px;
  text-align: center;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: 0 8px 20px rgba(58, 110, 165, 0.3);
  white-space: nowrap;
}

.btn-hero-primary:hover {
  background-color: var(--btn-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(58, 110, 165, 0.4);
}

/* Visualization (CSS Mockup Scale) */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1000px;
}

.scale-mockup {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1/1;
  position: relative;
  transform: rotateX(20deg) rotateY(-10deg) rotateZ(5deg);
  transition: transform 0.5s ease;
}

.scale-mockup:hover {
  transform: rotateX(10deg) rotateY(-5deg) rotateZ(2deg) scale(1.02);
}

.scale-body {
  width: 100%;
  height: 100%;
  background: white;
  border-radius: 30px;
  box-shadow:
    0 20px 50px rgba(0, 0, 0, 0.1),
    0 4px 10px rgba(0, 0, 0, 0.05),
    inset 0 0 0 2px rgba(220, 230, 240, 0.5);
  position: relative;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, #ffffff 0%, #f0f4f8 100%);
}

.scale-glass-reflection {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    115deg,
    rgba(255, 255, 255, 0.8) 0%,
    rgba(255, 255, 255, 0) 40%
  );
  pointer-events: none;
}

.scale-screen {
  width: 120px;
  height: 60px;
  background: #102a43; /* Dark header color for screen */
  border-radius: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--accent-cyan);
  font-family: monospace;
  font-size: 2rem;
  font-weight: 700;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.3);
  position: relative;
  top: -40px; /* Position towards top */
}

/* Handle CSS Mockup */
.scale-handle {
  position: absolute;
  bottom: -60px; /* Floating handle visual */
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 20px;
  background: var(--text-heading);
  border-radius: 10px;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.scale-handle::after {
  /* Cord */
  content: "";
  position: absolute;
  top: -40px;
  left: 50%;
  width: 2px;
  height: 40px;
  background: var(--text-muted);
}

/* Responsive Desgin */
@media (max-width: 1024px) {
  .hero-section {
    grid-template-columns: 1fr; /* Stack */
    padding: 60px 24px;
    gap: 40px;
    text-align: center;
  }

  .hero-content {
    align-items: center;
  }

  .feature-card {
    text-align: left; /* Keep feature text readable */
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
  }

  .hero-visual {
    order: -1; /* Show visual first */
    margin-top: 20px;
  }

  .hero-offer-box {
    flex-direction: column;
    text-align: center;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
  }

  .hero-offer-box::before {
    width: 100%;
    height: 4px; /* Top border instead of left */
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }

  .hero-section {
    margin: 20px 0;
    padding: 40px 20px;
  }
}

/* --- Specifications Section --- */
.specs-section {
  padding: 80px 0;
  margin-top: 40px;
  background-color: var(--bg-card); /* Keep it clean white */
  border-radius: 20px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.02); /* Very subtle elevation */
}

.specs-heading {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 50px;
  color: var(--text-heading);
}

.specs-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

.specs-table-wrapper {
  overflow-x: auto; /* Allow horiz scroll if needed on tiny screens (fallback) */
  border-radius: 12px;
  border: 1px solid var(--border-divider);
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  text-align: left;
}

.specs-table th {
  background-color: var(--bg-section);
  color: var(--text-heading);
  font-weight: 700;
  padding: 20px 24px;
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--border-divider);
}

.specs-table td {
  padding: 20px 24px;
  vertical-align: top;
  border-bottom: 1px solid var(--border-divider);
  color: var(--text-body);
  font-size: 1rem;
  line-height: 1.6;
}

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

/* Specific Columns */
.spec-feature {
  font-weight: 600;
  color: var(--primary-blue);
  width: 25%;
}

.spec-desc {
  width: 40%;
}

.spec-benefit {
  color: var(--text-heading);
  width: 35%;
  background-color: #fafbfc; /* Subtle highlight for benefits */
  font-style: italic;
  border-left: 1px solid var(--border-divider);
}

/* Hover effects for rows */
.specs-table tbody tr:hover td {
  background-color: #f8fbff;
}

/* --- Responsive Table (Stacking Card View) --- */
@media (max-width: 768px) {
  .specs-heading {
    font-size: 2rem;
    margin-bottom: 30px;
  }

  .specs-table,
  .specs-table thead,
  .specs-table tbody,
  .specs-table th,
  .specs-table td,
  .specs-table tr {
    display: block;
  }

  /* Hide table headers (but accessible) */
  .specs-table thead tr {
    position: absolute;
    top: -9999px;
    left: -9999px;
  }

  .specs-table tr {
    border: 1px solid var(--border-divider);
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
    background: white;
    overflow: hidden; /* For border radius */
  }

  .specs-table td {
    border-bottom: 1px solid #eee;
    position: relative;
    padding-left: 20px; /* Standard padding */
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .specs-table td:last-child {
    border-bottom: none;
  }

  /* Column styling adjustments for mobile */
  .spec-feature {
    background-color: var(--bg-section);
    color: var(--text-heading);
    font-size: 1.1rem;
    width: 100%;
    border-bottom: 1px solid var(--border-divider);
  }

  .spec-desc,
  .spec-benefit {
    width: 100%;
  }

  .spec-benefit {
    border-left: none; /* Remove desktop border */
    background-color: transparent;
    color: var(--primary-blue); /* Highlight benefit differently on mobile */
    font-weight: 500;
  }

  /* Add pseudo-labels for context on mobile */
  .spec-desc::before {
    content: "Specs: ";
    font-weight: 700;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    display: block;
    margin-bottom: 4px;
  }

  .spec-benefit::before {
    content: "Benefit: ";
    font-weight: 700;
    color: var(--accent-cyan);
    font-size: 0.8rem;
    text-transform: uppercase;
    display: block;
    margin-bottom: 4px;
  }
}

/* --- Product Overview Section --- */
.overview-section {
  padding: 80px 0;
  background-color: var(--bg-main);
}

.overview-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.overview-heading {
  font-size: 2.5rem;
  color: var(--text-heading);
  margin-bottom: 16px;
}

.overview-intro {
  font-size: 1.1rem;
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 40px;
}

.overview-subheading {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-blue);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.overview-subheading::before {
  content: "";
  width: 24px;
  height: 4px;
  background-color: var(--accent-cyan);
  border-radius: 2px;
}

.overview-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.overview-list li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.overview-icon {
  min-width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: #e3f2fd; /* Very light blue */
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-blue);
  margin-top: -4px; /* Align with first line of text */
}

.overview-list span {
  color: var(--text-body);
  line-height: 1.5;
}

.overview-list strong {
  color: var(--text-heading);
  font-weight: 600;
}

.conversion-trigger {
  margin-top: 40px;
  background-color: var(--secondary-navy);
  padding: 24px 32px;
  border-radius: 12px;
  border-left: 6px solid var(--accent-cyan);
  box-shadow: 0 10px 30px rgba(31, 58, 77, 0.2);
}

.conversion-trigger p {
  color: white;
  font-size: 1.1rem;
  font-style: italic;
  margin: 0;
}

.conversion-trigger strong {
  color: var(--accent-cyan);
}

/* Overview Visual Mockup */
.overview-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.overview-video-wrapper {
  width: 100%;
  max-width: 450px;
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  background: white;
  border: 1px solid var(--border-divider);
}

.overview-video {
  width: 100%;
  height: auto;
  display: block;
}

.overview-video-wrapper::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.05);
}

/* Responsive Overview */
@media (max-width: 1024px) {
  .overview-container {
    grid-template-columns: 1fr;
    gap: 60px;
    padding: 0 24px;
  }

  .overview-visual {
    order: -1;
    margin-bottom: 20px;
  }
}

/* --- Accuracy & Clinical Validation Section --- */
.accuracy-section {
  padding: 80px 0;
  background-color: white;
}

.accuracy-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.accuracy-heading {
  font-size: 2.5rem;
  color: var(--text-heading);
  margin-bottom: 20px;
}

.accuracy-lead {
  font-size: 1.125rem;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 50px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.accuracy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  margin-bottom: 50px;
}

.accuracy-card {
  background-color: var(--bg-section);
  padding: 40px;
  border-radius: 20px;
  text-align: left;
  transition: transform 0.3s ease;
  border: 1px solid transparent;
}

.accuracy-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-divider);
  background-color: #f8fbff;
}

.accuracy-card h3 {
  color: var(--primary-blue);
  margin-bottom: 16px;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
}

.accuracy-card p {
  color: var(--text-body);
  font-size: 1rem;
  line-height: 1.6;
}

.accuracy-highlight {
  background-color: var(--secondary-navy);
  color: white;
  padding: 30px;
  border-radius: 50px;
  display: inline-flex;
  align-items: center;
  gap: 20px;
  max-width: 100%;
}

.highlight-label {
  background-color: var(--accent-cyan);
  color: var(--secondary-navy);
  padding: 6px 16px;
  border-radius: 20px;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.accuracy-highlight p {
  margin: 0;
  text-align: left;
  font-size: 1.05rem;
}

.accuracy-highlight strong {
  color: var(--accent-cyan);
}

@media (max-width: 768px) {
  .accuracy-grid {
    grid-template-columns: 1fr;
  }

  .accuracy-highlight {
    flex-direction: column;
    border-radius: 24px;
    text-align: center;
    padding: 24px;
    gap: 12px;
  }

  .accuracy-highlight p {
    text-align: center;
  }
}

/* --- Key Features Section --- */
.features-section {
  padding: 80px 0;
  background-color: var(--bg-main);
}

.container-narrow {
  max-width: 1000px;
}

.features-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 60px;
}

.features-heading {
  font-size: 2.5rem;
  color: var(--text-heading);
  margin-bottom: 20px;
}

.features-intro {
  font-size: 1.125rem;
  color: var(--text-body);
  line-height: 1.6;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 60px;
}

.feature-detail-card {
  background: white;
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
  border: 1px solid var(--border-divider);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.feature-detail-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 24px rgba(58, 110, 165, 0.1);
  border-color: rgba(58, 110, 165, 0.3);
}

.feature-detail-icon {
  width: 48px;
  height: 48px;
  background-color: var(--bg-input);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-blue);
  margin-bottom: 20px;
}

.feature-detail-card h4 {
  font-size: 1.2rem;
  color: var(--text-heading);
  margin-bottom: 12px;
}

.feature-detail-card p {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.5;
}

/* Highlight specifically the 'No Subscription' card */
.feature-detail-card.highlight-feature {
  background: linear-gradient(135deg, white 0%, #f0f7ff 100%);
  border: 1px solid var(--accent-cyan);
  position: relative;
  overflow: hidden;
}

.feature-detail-card.highlight-feature::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background-color: var(--accent-cyan);
}

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

.trigger-box {
  display: inline-block;
  background-color: var(--secondary-navy);
  color: white;
  padding: 20px 40px;
  border-radius: 50px;
  box-shadow: 0 8px 24px rgba(31, 58, 77, 0.2);
}

.trigger-box p {
  margin: 0;
  font-size: 1.05rem;
  font-style: italic;
}

.trigger-box strong {
  color: var(--accent-cyan);
}

@media (max-width: 768px) {
  .features-heading {
    font-size: 2rem;
  }

  .feature-detail-card {
    padding: 24px;
  }
}

/* --- Build Quality Section --- */
.build-section {
  padding: 100px 0;
  background-color: var(--bg-section);
}

.build-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: flex-start;
  margin-bottom: 50px;
}

.build-heading {
  font-size: 2.5rem;
  color: var(--text-heading);
  margin-bottom: 20px;
  line-height: 1.25;
}

.build-intro {
  font-size: 1.1rem;
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 40px;
}

/* Info Grid */
.build-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

.build-info-item {
  display: flex;
  gap: 16px;
  background: white;
  padding: 20px;
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
  border: 1px solid rgba(58, 110, 165, 0.1);
  transition: transform 0.3s ease;
}

.build-info-item:hover {
  transform: translateY(-5px);
  border-color: var(--primary-blue);
}

.build-info-icon {
  width: 40px;
  height: 40px;
  background-color: #f0f7ff;
  color: var(--primary-blue);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.build-info-text strong {
  display: block;
  color: var(--text-heading);
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.build-info-text p {
  color: var(--text-body);
  font-size: 0.9rem;
  line-height: 1.4;
  margin: 0;
}

.build-conversion {
  border-left: 4px solid var(--primary-blue);
  padding-left: 20px;
  margin-top: 30px;
}

.build-conversion p {
  font-size: 1.1rem;
  font-style: italic;
  color: var(--text-heading);
  margin: 0;
}

/* Video Visualization */
.build-visual {
  position: sticky;
  top: 100px;
}

.build-video-container {
  position: relative;
  width: 100%;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.15);
  background: white;
  aspect-ratio: 1 / 1;
}

.build-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-overlay-badge {
  position: absolute;
  bottom: 20px;
  right: 20px;
  background: rgba(31, 58, 77, 0.9);
  color: white;
  padding: 8px 16px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.85rem;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Mini Specs Table */
.specs-mini-table {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1px;
  background-color: var(--border-divider);
  border: 1px solid var(--border-divider);
  border-radius: 16px;
  overflow: hidden;
  margin-top: 40px;
}

.spec-row {
  background: white;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: center;
}

.spec-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 700;
}

.spec-value {
  font-size: 1.1rem;
  color: var(--text-heading);
  font-weight: 600;
}

@media (max-width: 1024px) {
  .build-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .build-visual {
    position: relative;
    top: 0;
    order: -1;
  }

  .build-video-container {
    max-width: 500px;
    margin: 0 auto;
  }
}

/* --- How It Works Section --- */
.how-it-works-section {
  padding: 100px 0;
  background-color: var(--bg-main);
}

.section-title-center {
  font-size: 2.5rem;
  color: var(--text-heading);
  text-align: center;
  margin-bottom: 20px;
}

.section-intro-center {
  font-size: 1.1rem;
  color: var(--text-body);
  text-align: center;
  max-width: 800px;
  margin: 0 auto 60px;
  line-height: 1.6;
}

.how-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 80px;
}

.how-card {
  background: white;
  padding: 30px 20px;
  border-radius: 16px;
  border: 1px solid var(--border-divider);
  text-align: center;
  position: relative;
  transition: transform 0.3s ease;
}

.how-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-blue);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
}

.step-badge {
  width: 32px;
  height: 32px;
  background-color: var(--secondary-navy);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin: 0 auto 16px;
}

.how-card h3 {
  font-size: 1.1rem;
  color: var(--text-heading);
  margin-bottom: 12px;
}

.how-card p {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.5;
}

/* Science Explainer */
.science-explainer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  background-color: white;
  border-radius: 20px;
  padding: 40px;
  border: 1px solid var(--border-divider);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
}

.science-text h3 {
  font-size: 1.8rem;
  color: var(--text-heading);
  margin-bottom: 20px;
}

.science-text p {
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 30px;
}

.science-trigger {
  background-color: #f0f7ff;
  border-left: 4px solid var(--primary-blue);
  padding: 20px;
  color: var(--text-heading);
  font-style: italic;
  border-radius: 0 8px 8px 0;
}

/* Body Flow Diagram Mockup */
.science-visual {
  display: flex;
  justify-content: center;
}

.electrode-advantage-image {
  width: 100%;
  max-width: 320px;
  height: auto;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease;
}

.electrode-advantage-image:hover {
  transform: scale(1.02);
}

@media (max-width: 1024px) {
  .how-grid {
    grid-template-columns: 1fr 1fr;
  }

  .science-explainer {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 600px) {
  .how-grid {
    grid-template-columns: 1fr;
  }
}

/* --- How to Use: Guidelines Section --- */
.usage-section {
  padding: 80px 0;
  background-color: white;
}

.usage-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px;
}

.usage-heading {
  font-size: 2.2rem;
  color: var(--text-heading);
  margin-bottom: 20px;
}

.usage-intro {
  font-size: 1.1rem;
  color: var(--text-body);
  line-height: 1.6;
}

.usage-steps-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 60px;
}

.usage-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.usage-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: rgba(58, 110, 165, 0.15); /* Faded primary blue */
  line-height: 1;
  margin-bottom: 12px;
}

.usage-content h4 {
  font-size: 1.25rem;
  color: var(--text-heading);
  margin-bottom: 10px;
}

.usage-content p {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.5;
}

.usage-warning-box {
  background-color: #fff8e1; /* Light yellow warning bg */
  border: 1px solid #ffe082;
  border-radius: 12px;
  padding: 24px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.warning-icon {
  color: #f57c00; /* Darker orange warning color */
  flex-shrink: 0;
}

.warning-content {
  color: #614008;
  font-size: 1rem;
  line-height: 1.5;
}

@media (max-width: 1024px) {
  .usage-steps-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .usage-steps-list {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

/* --- App Experience Section --- */
.app-section {
  padding: 100px 0;
  background-color: var(--bg-section);
}

.app-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.section-tag {
  display: inline-block;
  color: var(--primary-blue);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.8rem;
  margin-bottom: 12px;
}

.app-heading {
  font-size: 2.2rem;
  color: var(--text-heading);
  margin-bottom: 20px;
  line-height: 1.25;
}

.app-intro {
  font-size: 1.1rem;
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 30px;
}

.app-features-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 40px;
}

.app-features-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--text-heading);
  font-weight: 500;
}

.app-feature-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: white;
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.no-sub-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background-color: var(--text-heading); /* Dark bg */
  color: white;
  padding: 12px 24px;
  border-radius: 50px;
  font-weight: 600;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.no-sub-badge svg {
  color: var(--accent-cyan);
}

/* App Visual Mockup */
.app-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.app-experience-image {
  width: 100%;
  max-width: 320px;
  height: auto;
  border-radius: 30px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
  z-index: 2;
  position: relative;
}

/* Float Badges */
.float-badge {
  position: absolute;
  background: white;
  padding: 10px 20px;
  border-radius: 30px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-heading);
  z-index: 3;
  animation: float 4s ease-in-out infinite;
}

.fb-1 {
  top: 60px;
  left: -20px;
}
.fb-2 {
  bottom: 80px;
  right: -20px;
  animation-delay: 2s;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@media (max-width: 1024px) {
  .app-container {
    grid-template-columns: 1fr;
    gap: 60px;
  }

  .app-visual {
    order: -1;
  }
}

/* --- Common Mistakes & Best Practices Section --- */
.tips-section {
  padding: 100px 0;
  background-color: white;
}

.container-medium {
  max-width: 1000px;
  margin: 0 auto;
}

.tips-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.tip-column {
  border-radius: 20px;
  padding: 30px;
  position: relative;
  overflow: hidden;
}

.best-practices {
  background-color: #e8f5e9; /* Light green bg */
  border: 1px solid #c8e6c9;
}

.mistakes {
  background-color: #ffebee; /* Light red bg */
  border: 1px solid #ffcdd2;
}

.tip-column h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.best-practices h3 {
  color: #2e7d32;
}
.mistakes h3 {
  color: #c62828;
}

.tip-icon-header {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: white;
}

.tip-icon-header.check {
  background-color: #2e7d32;
}
.tip-icon-header.cross {
  background-color: #c62828;
}

.tip-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tip-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 1rem;
  color: var(--text-heading);
  line-height: 1.5;
}

.bullet {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
  position: relative;
}

.bullet.check::before {
  content: "✓";
  font-weight: 900;
  color: #2e7d32;
  position: absolute;
  top: -2px;
  left: 0;
}

.bullet.cross::before {
  content: "✕";
  font-weight: 900;
  color: #c62828;
  position: absolute;
  top: -2px;
  left: 0;
  font-size: 0.9em;
}

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

.tips-footer p {
  display: inline-block;
  background-color: var(--bg-section);
  padding: 12px 24px;
  border-radius: 50px;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}

@media (max-width: 768px) {
  .tips-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Real Customer Reviews Section --- */
.reviews-section {
  padding: 100px 0;
  background-color: var(--bg-main);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 30px;
}

.review-card {
  background-color: white;
  border: 1px solid var(--border-divider);
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
  transition: transform 0.3s ease;
}

.review-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 24px rgba(58, 110, 165, 0.12);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.review-avatar {
  width: 48px;
  height: 48px;
  background-color: var(--secondary-navy);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.review-meta h4 {
  color: var(--text-heading);
  margin-bottom: 2px;
  font-size: 1.05rem;
}

.review-meta .location {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.review-stars {
  color: #ffc107; /* Star yellow */
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.review-text {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.6;
  font-style: italic;
}

@media (max-width: 768px) {
  .reviews-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Why We Recommend This Product Section --- */
.recommend-section {
  padding: 80px 0 120px;
  background-color: var(--bg-section);
}

.recommend-card {
  background-color: white;
  border-radius: 20px;
  padding: 60px 40px;
  box-shadow: 0 20px 60px rgba(58, 110, 165, 0.1);
  border: 1px solid var(--border-divider);
  text-align: center;
}

.recommend-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  margin: 40px 0;
  text-align: left;
}

.recommend-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  background-color: var(--bg-main);
  padding: 16px;
  border-radius: 12px;
}

.recommend-icon {
  width: 40px;
  height: 40px;
  background-color: var(--primary-blue);
  color: white;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.recommend-list span {
  color: var(--text-body);
  font-size: 1.05rem;
}

.recommend-list strong {
  color: var(--text-heading);
}

.recommend-footer {
  margin-bottom: 40px;
}

.recommend-footer p {
  color: var(--text-muted);
  font-size: 1rem;
  font-style: italic;
}

.cta-container {
  margin-top: 20px;
}

@media (max-width: 768px) {
  .recommend-card {
    padding: 40px 24px;
  }

  .recommend-list {
    grid-template-columns: 1fr;
  }
}

/* --- Special Offer / Discount Section --- */
.offer-section {
  padding: 100px 0;
  background-color: var(--bg-main);
}

.offer-header {
  text-align: center;
  margin-bottom: 60px;
}

.offer-tag {
  display: inline-block;
  background-color: #ff5252;
  color: white;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.85rem;
  padding: 6px 16px;
  border-radius: 4px;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.highlight-code {
  background-color: #ffd740;
  color: #333;
  padding: 2px 8px;
  border-radius: 4px;
  font-family: monospace;
  font-weight: 700;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: center; /* Vertically align so middle one can pop */
  margin-bottom: 50px;
}

.pricing-card {
  background-color: white;
  border-radius: 20px;
  padding: 40px 30px;
  border: 1px solid var(--border-divider);
  text-align: center;
  position: relative;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease;
}

.pricing-card:hover {
  transform: translateY(-5px);
}

/* Popular card styling */
.pricing-card.popular {
  border-color: var(--primary-blue);
  box-shadow: 0 20px 50px rgba(58, 110, 165, 0.15);
  transform: scale(1.05); /* Slightly larger */
  z-index: 2;
}

.pricing-card.popular:hover {
  transform: scale(1.05) translateY(-5px);
}

.popular-tag {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--primary-blue);
  color: white;
  padding: 6px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
}

.package-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-heading);
}

.price-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 10px;
}

.old-price {
  font-size: 1.2rem;
  color: var(--text-muted);
  text-decoration: line-through;
  margin-bottom: 4px;
}

.new-price {
  font-size: 2.5rem;
  color: var(--text-heading);
  font-weight: 800;
  line-height: 1;
}

.unit-price {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.discount-badge {
  display: inline-block;
  background-color: #ffebee;
  color: #c62828;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 8px;
  margin-bottom: 30px;
}

.package-features {
  list-style: none;
  padding: 0;
  margin: 0 0 30px;
  text-align: left;
}

.package-features li {
  padding: 10px 0;
  border-bottom: 1px solid #f0f0f0;
  color: var(--text-body);
  font-size: 0.95rem;
}

.package-features li:last-child {
  border-bottom: none;
}

.btn-pricing {
  display: block;
  width: 100%;
  padding: 16px;
  border-radius: 12px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  background-color: #f0f7ff;
  color: var(--primary-blue);
}

.btn-pricing:hover {
  background-color: #e0f0ff;
}

.btn-pricing-highlight {
  background-color: var(--primary-blue);
  color: white;
  box-shadow: 0 10px 20px rgba(58, 110, 165, 0.25);
}

.btn-pricing-highlight:hover {
  background-color: var(--secondary-navy);
  box-shadow: 0 10px 20px rgba(10, 25, 47, 0.25);
}

.offer-details {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.offer-details p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr); /* 2 columns for tablet */
    gap: 20px;
  }

  .pricing-card.popular {
    transform: scale(
      1
    ); /* remove scale effect on smaller screens to avoid overlap */
  }
  .pricing-card.popular:hover {
    transform: translateY(-5px);
  }
}

@media (max-width: 768px) {
  .pricing-grid {
    grid-template-columns: 1fr; /* Stack on mobile */
  }

  .popular-tag {
    position: static;
    display: inline-block;
    margin-bottom: 16px;
    transform: none;
  }
}

/* --- Size Guide / Fit Section --- */
.size-guide-section {
  padding: 100px 0;
  background-color: white;
}

.size-guide-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.specs-mini-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

.spec-mini-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background-color: var(--bg-section);
  padding: 16px;
  border-radius: 12px;
}

.spec-icon {
  width: 40px;
  height: 40px;
  background-color: white;
  color: var(--secondary-navy);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.spec-detail {
  display: flex;
  flex-direction: column;
}

.spec-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.spec-value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-heading);
}

.fit-note {
  background-color: #f8fbff;
  border-left: 4px solid var(--primary-blue);
  padding: 16px;
  color: var(--text-body);
  font-size: 0.95rem;
  border-radius: 0 8px 8px 0;
}

/* Visualization: Dimensions */
.size-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.size-guide-image {
  width: 100%;
  max-width: 450px;
  height: auto;
  border-radius: 20px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
  transition: transform 0.3s ease;
}

.size-guide-image:hover {
  transform: scale(1.02);
}

@media (max-width: 1024px) {
  .size-guide-container {
    grid-template-columns: 1fr;
    gap: 60px;
  }
  .size-visual {
    order: -1;
  }

  .size-guide-image {
    max-width: 100%;
  }
}

/* --- Who Should Buy Section --- */
.target-audience-section {
  padding: 100px 0;
  background-color: var(--bg-section);
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 50px;
}

.audience-card {
  background-color: white;
  padding: 30px;
  border-radius: 16px;
  border: 1px solid var(--border-divider);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.02);
  transition: transform 0.3s ease;
}

.audience-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
}

.audience-icon {
  width: 48px;
  height: 48px;
  background-color: var(--secondary-navy);
  color: white;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.audience-card h3 {
  font-size: 1.25rem;
  color: var(--text-heading);
  margin-bottom: 12px;
}

.audience-card p {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.5;
}

.not-recommended-box {
  background-color: #ffebee; /* Light red warning */
  border: 1px solid #ffcdd2;
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.not-rec-title {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #c62828;
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.not-recommended-box p {
  color: #b71c1c; /* Darker red text */
  font-size: 0.95rem;
  line-height: 1.5;
}

@media (max-width: 768px) {
  .audience-grid {
    grid-template-columns: 1fr;
  }
}

/* --- What Makes It Different Section --- */
.comparison-section {
  padding: 100px 0;
  background-color: white;
}

.comparison-table-container {
  max-width: 900px;
  margin: 0 auto 50px;
  border: 1px solid var(--border-divider);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
}

.comparison-header-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  background-color: var(--secondary-navy);
  color: white;
  padding: 20px 30px;
  font-weight: 700;
  font-size: 1.1rem;
}

.comparison-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  padding: 24px 30px;
  border-bottom: 1px solid var(--border-divider);
  align-items: center;
}

.comparison-row:last-child {
  border-bottom: none;
}

.comp-col-feature {
  color: var(--text-heading);
  font-weight: 700;
  font-size: 1.05rem;
}

.comp-col-typical {
  color: var(--text-muted);
}

.comp-col-herz {
  color: var(--primary-blue);
  font-size: 1.05rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}

.highlight-tag {
  font-size: 0.75rem;
  background-color: #e3f2fd; /* Light blue bg */
  color: var(--primary-blue);
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 700;
  text-transform: uppercase;
}

.comparison-footer {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.comparison-footer p {
  color: var(--text-body);
  font-size: 1.1rem;
  font-style: italic;
  background: #f8fbff;
  padding: 24px;
  border-radius: 12px;
  border-left: 4px solid var(--primary-blue);
}

@media (max-width: 768px) {
  .comparison-header-row,
  .comparison-row {
    grid-template-columns: 1fr;
    gap: 12px;
    text-align: center;
  }

  .comp-col-herz {
    align-items: center;
  }

  .comparison-header-row {
    display: none; /* Hide header on mobile for simpler stacking */
  }

  .comparison-row {
    position: relative;
    padding-top: 40px;
  }

  .comp-col-feature {
    font-size: 1.2rem;
    margin-bottom: 8px;
    position: absolute;
    top: 16px;
    left: 0;
    right: 0;
    text-decoration: underline;
    text-decoration-color: var(--primary-blue);
    text-underline-offset: 4px;
  }

  .comp-col-typical::before {
    content: "Typical: ";
    font-weight: 600;
  }
}

/* --- Detailed Comparison Table Section --- */
.detailed-comparison-section {
  padding: 100px 0;
  background-color: var(--bg-section);
}

.table-responsive-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 20px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
  background-color: white;
}

.detailed-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 800px; /* Ensure table doesn't squish too much */
}

.detailed-table th,
.detailed-table td {
  padding: 20px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border-divider);
  font-size: 0.95rem;
  color: var(--text-body);
}

.detailed-table th {
  background-color: white;
  font-weight: 700;
  color: var(--text-heading);
  border-top: 1px solid var(--border-divider);
  vertical-align: middle;
}

.detailed-table thead th {
  border-top: none;
  background-color: #f9fafb;
  font-size: 1.05rem;
}

/* Herz Column Highlight */
.detailed-table th.herz-col,
.detailed-table td.herz-cell {
  background-color: #f0f7ff;
  border-left: 2px solid var(--primary-blue);
  border-right: 2px solid var(--primary-blue);
  position: relative;
  z-index: 1; /* Keep shadow above if any */
}

/* Add shadow to pop the column */
.detailed-table td.herz-cell {
  background-color: #eef6ff; /* Slightly darker to differentiate */
}

/* Feature Column */
.detailed-table .feature-col,
.detailed-table .feature-name {
  width: 20%;
  font-weight: 700;
  color: var(--text-heading);
  background-color: white;
  position: sticky;
  left: 0;
  z-index: 2; /* Keep label visible on scroll */
  min-width: 150px;
}

.detailed-table .feature-name {
  background-color: #f9fafb; /* Match feature column bg */
}

.th-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.th-badge {
  background-color: var(--primary-blue);
  color: white;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 700;
}

.highlight-cell {
  color: var(--primary-blue);
  font-weight: 700;
}

.price-cell {
  font-size: 1.1rem;
  color: var(--text-heading);
}

/* Mobile responsive adjustments */
@media (max-width: 768px) {
  .detailed-comparison-section {
    padding: 60px 0;
  }

  .detailed-table .feature-col,
  .detailed-table .feature-name {
    position: static; /* Unstick on mobile to allow full scrolling if screen very small */
    background-color: transparent;
  }

  .th-badge {
    font-size: 0.7rem;
    padding: 2px 8px;
  }
}

/* --- Shipping & Returns Section --- */
.shipping-section {
  padding: 80px 0;
  background-color: white;
}

.shipping-card {
  background-color: white;
  border: 1px solid var(--border-divider);
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.shipping-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--border-divider);
  padding-bottom: 20px;
}

.shipping-icon-container {
  background-color: var(--secondary-navy);
  color: white;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.section-title-small {
  font-size: 1.5rem;
  color: var(--text-heading);
  margin: 0;
}

.shipping-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.shipping-item h3 {
  font-size: 1.1rem;
  color: var(--text-heading);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.shipping-item p {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 8px;
}

.icon-inline {
  font-size: 1.2rem;
}

.shipping-countries {
  font-size: 0.85rem;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .shipping-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .shipping-card {
    padding: 24px;
  }
}

/* --- Guarantee Section (Final) --- */
.guarantee-section {
  padding: 80px 0 120px; /* Extra bottom padding for breathing room before footer */
  background-color: var(--bg-section);
  text-align: center;
}

.guarantee-badge-container {
  display: flex;
  justify-content: center;
  margin-bottom: 30px;
}

.guarantee-badge {
  max-width: 180px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.guarantee-image {
  width: 100%;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.1));
  transition: transform 0.3s ease;
}

.guarantee-image:hover {
  transform: scale(1.05);
}

.guarantee-content {
  max-width: 700px;
  margin: 0 auto;
}

.guarantee-text {
  font-size: 1.1rem;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 20px;
}

.guarantee-subtext {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-style: italic;
}

/* --- FAQ Section --- */
.faq-section {
  padding: 100px 0;
  background-color: white;
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  border: 1px solid var(--border-divider);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: var(--primary-blue);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: white;
  padding: 24px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-heading);
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.2s;
}

.faq-question:hover {
  background-color: #f8fbff;
}

.faq-icon {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--primary-blue);
  transition: transform 0.3s ease;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  background-color: #f8fbff;
  transition: max-height 0.3s ease-out;
}

.faq-answer p {
  padding: 24px;
  padding-top: 0;
  color: var(--text-body);
  line-height: 1.6;
  margin: 0;
}

/* Active state classes for JS */
.faq-item.active {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  border-color: var(--primary-blue);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-item.active .faq-answer {
  max-height: 300px; /* Arbitrary large height */
  transition: max-height 0.3s ease-in;
}

/* --- Transparency & Limitations Section --- */
.disclaimer-section {
  padding: 60px 0 100px;
  background-color: var(--bg-section);
}

.disclaimer-box {
  background-color: #fff9e6; /* Light yellow warning background */
  border: 2px solid #ffc107;
  border-radius: 16px;
  padding: 40px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.disclaimer-icon {
  width: 48px;
  height: 48px;
  background-color: #ffc107;
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.disclaimer-content h3 {
  font-size: 1.4rem;
  color: var(--text-heading);
  margin-bottom: 12px;
}

.disclaimer-intro {
  font-size: 1rem;
  color: var(--text-body);
  margin-bottom: 20px;
  line-height: 1.6;
}

.disclaimer-list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}

.disclaimer-list li {
  padding: 8px 0;
  padding-left: 24px;
  position: relative;
  color: var(--text-body);
  line-height: 1.6;
}

.disclaimer-list li::before {
  content: "⚠";
  position: absolute;
  left: 0;
  color: #ffc107;
  font-size: 1.1rem;
}

.disclaimer-footer {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-style: italic;
  margin: 0;
}

@media (max-width: 768px) {
  .disclaimer-box {
    flex-direction: column;
    padding: 24px;
  }
}

/* --- Privacy & Health Data Protection Section --- */
.privacy-section {
  padding: 100px 0;
  background-color: white;
}

.privacy-header {
  text-align: center;
  margin-bottom: 60px;
}

.privacy-icon-large {
  width: 80px;
  height: 80px;
  background-color: var(--primary-blue);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  box-shadow: 0 10px 30px rgba(58, 110, 165, 0.2);
}

.privacy-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-bottom: 50px;
}

.privacy-feature-card {
  background-color: var(--bg-section);
  border: 1px solid var(--border-divider);
  border-radius: 16px;
  padding: 30px;
  text-align: center;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

.privacy-feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.privacy-feature-icon {
  width: 64px;
  height: 64px;
  background-color: white;
  color: var(--primary-blue);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.privacy-feature-card h3 {
  font-size: 1.2rem;
  color: var(--text-heading);
  margin-bottom: 12px;
}

.privacy-feature-card p {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.6;
}

.privacy-footer-note {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  padding: 24px;
  background-color: #f0f7ff;
  border-radius: 12px;
}

.privacy-footer-note p {
  font-size: 1rem;
  color: var(--text-body);
  line-height: 1.6;
  margin: 0;
  font-style: italic;
}

@media (max-width: 1024px) {
  .privacy-features {
    grid-template-columns: 1fr;
  }
}

/* --- Security & Checkout Assurance Section --- */
.security-section {
  padding: 100px 0;
  background-color: var(--bg-section);
}

.security-container {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: center;
}

.security-visual {
  display: flex;
  justify-content: center;
}

.security-badge-large {
  width: 100%;
  max-width: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.security-image-seal {
  width: 100%;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 15px 35px rgba(0, 0, 0, 0.1));
}

.security-content h2 {
  font-size: 2rem;
  color: var(--text-heading);
  margin-bottom: 16px;
}

.security-intro {
  font-size: 1.1rem;
  color: var(--text-body);
  margin-bottom: 30px;
  line-height: 1.6;
}

.security-features-list {
  list-style: none;
  padding: 0;
  margin: 0 0 30px;
}

.security-features-list li {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  align-items: flex-start;
}

.security-check {
  width: 32px;
  height: 32px;
  background-color: #2e7d32;
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.security-features-list strong {
  display: block;
  color: var(--text-heading);
  margin-bottom: 4px;
  font-size: 1.05rem;
}

.security-features-list p {
  color: var(--text-body);
  line-height: 1.6;
  margin: 0;
  font-size: 0.95rem;
}

.security-footer {
  background-color: #e8f5e9;
  padding: 16px 20px;
  border-left: 4px solid #2e7d32;
  border-radius: 0 8px 8px 0;
}

.security-footer p {
  margin: 0;
  color: var(--text-body);
  font-size: 0.95rem;
  font-style: italic;
}

@media (max-width: 1024px) {
  .security-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .security-visual {
    order: -1;
  }
}

/* --- Contact Support Section --- */
.contact-section {
  padding: 100px 0;
  background-color: white;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 50px;
}

.contact-info-card,
.contact-notes-card {
  background-color: var(--bg-section);
  border: 1px solid var(--border-divider);
  border-radius: 16px;
  padding: 40px;
}

.contact-info-card h3,
.contact-notes-card h3 {
  font-size: 1.5rem;
  color: var(--text-heading);
  margin-bottom: 30px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--primary-blue);
}

.contact-item {
  display: flex;
  gap: 20px;
  margin-bottom: 30px;
  align-items: flex-start;
}

.contact-icon {
  width: 48px;
  height: 48px;
  background-color: var(--primary-blue);
  color: white;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-details strong {
  display: block;
  color: var(--text-heading);
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.contact-details p {
  color: var(--text-body);
  line-height: 1.6;
  margin: 0;
  font-size: 0.95rem;
}

.contact-details a {
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 600;
}

.contact-details a:hover {
  text-decoration: underline;
}

.support-note {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  padding: 20px;
  background-color: white;
  border-radius: 12px;
  border-left: 4px solid var(--primary-blue);
}

.note-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.support-note strong {
  display: block;
  color: var(--text-heading);
  margin-bottom: 6px;
  font-size: 1.05rem;
}

.support-note p {
  color: var(--text-body);
  line-height: 1.6;
  margin: 0;
  font-size: 0.9rem;
}

.support-footer-note {
  margin-top: 30px;
  padding: 20px;
  background-color: #f0f7ff;
  border-radius: 12px;
  text-align: center;
}

.support-footer-note p {
  margin: 0;
  color: var(--text-body);
  font-size: 0.95rem;
}

@media (max-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Last Updated Section --- */
.last-updated-section {
  padding: 60px 0;
  background-color: var(--bg-section);
}

.last-updated-box {
  background-color: white;
  border: 1px solid var(--border-divider);
  border-radius: 12px;
  padding: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.update-icon {
  width: 48px;
  height: 48px;
  background-color: #f0f7ff;
  color: var(--primary-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.update-content {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 12px;
  font-size: 1.05rem;
}

.update-content strong {
  color: var(--text-heading);
}

.update-content span {
  color: var(--primary-blue);
  font-weight: 600;
}

.update-note {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
  font-style: italic;
}

/* --- Hero Product Image --- */
.hero-product-image {
  width: 100%;
  max-width: 500px;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 20px 60px rgba(0, 0, 0, 0.15));
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

@media (max-width: 768px) {
  .hero-product-image {
    max-width: 100%;
  }
}