:root {
  /* Dynamic Theme Variables: DARK Theme with Cyan/Teal Accents */
  --cor-bg: #0c1017;
  --cor-surface: #141a24;
  --cor-surface-alt: #1a2230;
  --cor-border: #263346;
  --cor-accent: #00e5ff;
  --cor-accent-hover: #00b4d8;
  --cor-accent-glow: rgba(0, 229, 255, 0.2);
  --cor-ink-bright: #ffffff;
  --cor-ink-main: #f0f4f8;
  --cor-ink-muted: #94a3b8;
  --cor-star-gold: #ffc107;
  
  /* Container & Radius */
  --cor-container-w: 1180px;
  --cor-radius-soft: 16px;
  
  /* Shadow Depth: DEEP */
  --cor-shadow-deep: 0 20px 40px -15px rgba(0, 0, 0, 0.7), 0 0 25px rgba(0, 229, 255, 0.12);
  --cor-shadow-card: 0 10px 30px -5px rgba(0, 0, 0, 0.5);
  
  /* Typography */
  --cor-font-heading: 'Montserrat', sans-serif;
  --cor-font-body: 'Inter', sans-serif;
}

/* Base Document Layout */
html {
  box-sizing: border-box;
  scroll-behavior: smooth;
}

*, *:before, *:after {
  box-sizing: inherit;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0;
  background-color: var(--cor-bg);
  color: var(--cor-ink-main);
  font-family: var(--cor-font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.cor-bg-pattern {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* Header Styles */
.cor-site-header {
  position: relative;
  z-index: 20;
  width: 100%;
  background-color: rgba(20, 26, 36, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--cor-border);
}

.cor-header-inner {
  max-width: var(--cor-container-w);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cor-brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--cor-ink-bright);
}

.cor-brand-icon {
  width: 32px;
  height: 32px;
  color: var(--cor-accent);
}

.cor-brand-name {
  font-family: var(--cor-font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: 0.05em;
  color: var(--cor-ink-bright);
}

.cor-header-deco {
  display: none;
}

@media (min-width: 768px) {
  .cor-header-deco {
    display: block;
  }
}

/* Main Content Shell */
.cor-main-shell {
  flex: 1;
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: var(--cor-container-w);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem 1.5rem;
}

/* Headings */
.cor-heading-primary {
  font-family: var(--cor-font-heading);
  font-weight: 800;
  text-transform: uppercase;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.2;
  color: var(--cor-ink-bright);
  margin-top: 0;
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}

.cor-heading-secondary {
  font-family: var(--cor-font-heading);
  font-weight: 700;
  text-transform: uppercase;
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: var(--cor-ink-bright);
  margin: 0 0 0.5rem 0;
  text-align: center;
}

.cor-subheading {
  text-align: center;
  color: var(--cor-ink-muted);
  max-width: 640px;
  margin: 0 auto 2.5rem auto;
  font-size: 1.05rem;
}

/* Preset A: Split Sticky Product Section */
.cor-product-stage {
  margin-bottom: 5rem;
}

.cor-stage-wrap {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

@media (min-width: 900px) {
  .cor-stage-wrap {
    flex-direction: row;
    align-items: flex-start;
  }
  
  .cor-media-sticky {
    width: 40%;
    position: sticky;
    top: 2rem;
    align-self: flex-start;
  }

  .cor-details-content {
    width: 60%;
  }
}

.cor-media-sticky {
  margin: 0;
}

.cor-image-frame {
  background: radial-gradient(circle at center, rgba(0, 229, 255, 0.12) 0%, rgba(20, 26, 36, 0.8) 70%);
  border: 1px solid var(--cor-border);
  border-radius: var(--cor-radius-soft);
  padding: 2rem;
  box-shadow: var(--cor-shadow-deep);
  display: flex;
  justify-content: center;
  align-items: center;
}

.cor-product-img {
  max-width: 100%;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 15px 25px rgba(0,0,0,0.6));
  transition: transform 0.3s ease;
}

.cor-image-frame:hover .cor-product-img {
  transform: scale(1.03);
}

/* Info Card & Lists */
.cor-info-card {
  background-color: var(--cor-surface);
  border: 1px solid var(--cor-border);
  border-radius: var(--cor-radius-soft);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--cor-shadow-card);
}

.cor-info-text {
  margin: 0;
  color: var(--cor-ink-main);
  font-size: 1.05rem;
}

.cor-mini-list {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.cor-mini-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.cor-icon-dot {
  width: 22px;
  height: 22px;
  min-width: 22px;
  background-color: rgba(0, 229, 255, 0.15);
  color: var(--cor-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.cor-mini-text {
  color: var(--cor-ink-muted);
  font-size: 0.98rem;
}

/* Guarantee Badge (Icon-Left) */
.cor-guarantee-left {
  display: flex;
  align-items: center;
  gap: 1rem;
  background-color: var(--cor-surface-alt);
  border-left: 4px solid var(--cor-accent);
  border-radius: var(--cor-radius-soft);
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
}

.cor-guarantee-icon {
  width: 38px;
  height: 38px;
  min-width: 38px;
  color: var(--cor-accent);
}

.cor-guarantee-title {
  display: block;
  color: var(--cor-ink-bright);
  font-size: 0.95rem;
  font-family: var(--cor-font-heading);
}

.cor-guarantee-desc {
  margin: 0;
  color: var(--cor-ink-muted);
  font-size: 0.85rem;
}

/* Price & CTA Cluster */
.cor-purchase-cluster {
  background-color: var(--cor-surface);
  border: 1px solid var(--cor-border);
  border-radius: var(--cor-radius-soft);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  box-shadow: var(--cor-shadow-deep);
}

@media (min-width: 480px) {
  .cor-purchase-cluster {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.cor-price-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.cor-price-label {
  font-size: 0.85rem;
  color: var(--cor-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.cor-price-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--cor-accent) 0%, var(--cor-accent-hover) 100%);
  color: #05080e;
  font-family: var(--cor-font-heading);
  font-weight: 800;
  font-size: 1.75rem;
  padding: 0.3rem 1rem;
  border-radius: var(--cor-radius-soft);
  box-shadow: 0 4px 15px var(--cor-accent-glow);
}

.cor-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background-color: var(--cor-accent);
  color: #05080e;
  font-family: var(--cor-font-heading);
  font-weight: 800;
  font-size: 1.15rem;
  text-transform: uppercase;
  text-decoration: none;
  padding: 1rem 2rem;
  border-radius: var(--cor-radius-soft);
  transition: all 0.25s ease;
  box-shadow: 0 8px 25px var(--cor-accent-glow);
}

.cor-action-btn:hover {
  background-color: #ffffff;
  color: #05080e;
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(255, 255, 255, 0.3);
}

/* Features Section (Horizontal Rows) */
.cor-benefits-section {
  margin-bottom: 5rem;
}

.cor-section-head {
  margin-bottom: 2.5rem;
}

.cor-rows-stack {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.cor-row-card {
  background-color: var(--cor-surface);
  border: 1px solid var(--cor-border);
  border-radius: var(--cor-radius-soft);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  box-shadow: var(--cor-shadow-card);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.cor-row-card:hover {
  border-color: var(--cor-accent);
  transform: translateX(4px);
}

.cor-row-icon-bubble {
  width: 64px;
  height: 64px;
  min-width: 64px;
  background-color: var(--cor-surface-alt);
  border: 2px solid var(--cor-accent);
  border-radius: 50%;
  color: var(--cor-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px var(--cor-accent-glow);
}

.cor-row-icon-bubble svg {
  width: 30px;
  height: 30px;
}

.cor-row-title {
  font-family: var(--cor-font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--cor-ink-bright);
  margin: 0 0 0.35rem 0;
}

.cor-row-desc {
  margin: 0;
  color: var(--cor-ink-muted);
  font-size: 0.95rem;
}

/* Testimonials Section (2-Column Grid with Accent Border-Top) */
.cor-feedback-section {
  background-color: var(--cor-surface);
  border: 1px solid var(--cor-border);
  border-radius: var(--cor-radius-soft);
  padding: 3rem 1.5rem;
  box-shadow: var(--cor-shadow-deep);
}

.cor-feedback-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .cor-feedback-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.cor-quote-card {
  background-color: var(--cor-bg);
  border: 1px solid var(--cor-border);
  border-top: 4px solid var(--cor-accent);
  border-radius: var(--cor-radius-soft);
  padding: 1.5rem;
  box-shadow: var(--cor-shadow-card);
}

.cor-quote-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.cor-avatar-initials {
  width: 46px;
  height: 46px;
  background-color: var(--cor-surface-alt);
  border: 1px solid var(--cor-accent);
  color: var(--cor-accent);
  font-family: var(--cor-font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cor-reviewer-name {
  display: block;
  font-family: var(--cor-font-heading);
  color: var(--cor-ink-bright);
  font-size: 1rem;
}

.cor-reviewer-city {
  display: block;
  font-size: 0.8rem;
  color: var(--cor-ink-muted);
}

.cor-star-row {
  color: var(--cor-star-gold);
  font-size: 1rem;
  letter-spacing: 2px;
  margin-bottom: 0.75rem;
}

.cor-quote-body {
  margin: 0;
  color: var(--cor-ink-main);
  font-style: italic;
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Footer Styles */
.cor-site-footer {
  position: relative;
  z-index: 20;
  width: 100%;
  background-color: #06090e;
  border-top: 1px solid var(--cor-border);
  padding: 3rem 1.5rem 2rem 1.5rem;
  margin-top: auto;
}

.cor-footer-inner {
  max-width: var(--cor-container-w);
  margin: 0 auto 2rem auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

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

.cor-footer-brand {
  max-width: 400px;
}

.cor-footer-tagline {
  margin: 0.75rem 0 0 0;
  color: var(--cor-ink-muted);
  font-size: 0.9rem;
}

.cor-footer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

@media (min-width: 768px) {
  .cor-footer-nav {
    align-items: flex-end;
  }
}

.cor-footer-link {
  color: var(--cor-ink-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.cor-footer-link:hover {
  color: var(--cor-accent);
}

.cor-footer-copy {
  max-width: var(--cor-container-w);
  margin: 0 auto;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  text-align: center;
  font-size: 0.8rem;
  color: var(--cor-ink-muted);
}