:root {
  --centrum-bg: #f4f8f6;
  --centrum-surface: #ffffff;
  --centrum-tone: #0d7a5f;
  --centrum-tone-hover: #095a46;
  --centrum-ink: #1a2e28;
  --centrum-gradient: linear-gradient(135deg, #0d7a5f 0%, #159a78 100%);
  --font-display: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--centrum-bg);
  color: var(--centrum-ink);
  font-family: var(--font-body);
}

/* Header Styling (Preset A: Accent strip at bottom) */
.centrum-header-strip {
  background-color: var(--centrum-surface);
  border-bottom: 4px solid var(--centrum-tone);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.centrum-brand-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--centrum-ink);
  line-height: 1.4;
}

@media (min-width: 768px) {
  .centrum-brand-title {
    font-size: 1.125rem;
  }
}

/* Main Container Showcase */
.centrum-showcase-box {
  background-color: var(--centrum-surface);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

@media (min-width: 768px) {
  .centrum-showcase-box {
    padding: 2.5rem;
  }
}

/* Gallery Logic */
.centrum-radio-toggle {
  display: none;
}

.centrum-slide-img {
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

#c-img-1:checked ~ .centrum-slide-wrap #slide-1,
#c-img-2:checked ~ .centrum-slide-wrap #slide-2,
#c-img-3:checked ~ .centrum-slide-wrap #slide-3,
#c-img-4:checked ~ .centrum-slide-wrap #slide-4 {
  opacity: 1;
  z-index: 10;
}

.centrum-thumb-item {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  border: 2px solid #e5e7eb;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s ease;
}

.centrum-thumb-item:hover {
  border-color: var(--centrum-tone);
}

#c-img-1:checked ~ .centrum-thumbs-row label[for="c-img-1"],
#c-img-2:checked ~ .centrum-thumbs-row label[for="c-img-2"],
#c-img-3:checked ~ .centrum-thumbs-row label[for="c-img-3"],
#c-img-4:checked ~ .centrum-thumbs-row label[for="c-img-4"] {
  border-color: var(--centrum-tone);
  box-shadow: 0 0 0 2px rgba(13, 122, 95, 0.2);
}

/* Product Info */
.centrum-product-heading {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--centrum-ink);
  line-height: 1.35;
}

.centrum-description-body {
  font-size: 0.95rem;
  color: #374151;
}

/* CTA Button (Preset A: Pill shape with hover shadow) */
.centrum-pill-button {
  background: var(--centrum-gradient);
  border-radius: 999px;
  box-shadow: 0 4px 14px rgba(13, 122, 95, 0.3);
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
}

.centrum-pill-button:hover {
  background: var(--centrum-tone-hover);
  box-shadow: 0 6px 20px rgba(13, 122, 95, 0.45);
  transform: translateY(-1px);
}

/* Reviews (Preset A: Left colored border 4px) */
.centrum-reviews-heading {
  font-family: var(--font-display);
  text-transform: uppercase;
  color: var(--centrum-ink);
}

.centrum-opinion-card {
  background-color: var(--centrum-surface);
  border-left: 4px solid var(--centrum-tone);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

/* Footer Styling */
.centrum-footer-bottom {
  background-color: var(--centrum-surface);
}