:root {
  --primary: #6d28d9;
  --secondary: #ede9fe;
  --accent: #10b981;
  --text: #4c1d95;
  --bg: #fafafa;
}

body {
  background: #ffffff;
  color: #111111;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  overflow-x: hidden;
}

/* Typography Scale */
.main-title {
  font-size: clamp(22px, 5vw, 36px);
  font-weight: 700;
}

.product-desc {
  font-size: clamp(14px, 4vw, 16px);
}

/* Base Card Style */
.card {
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  box-shadow: none;
}

/* Screen reader only utility strictly for radio inputs */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Responsive CSS-Only Gallery */
.gallery-wrapper {
  position: relative;
  width: 100%;
}

.gallery-main {
  position: relative;
  width: 100%;
  padding-bottom: 100%; /* Strict aspect ratio container */
  overflow: hidden;
  background-color: #fafafa;
}

.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  z-index: 1;
  transition: opacity 0.3s ease-in-out;
}

.slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

/* Gallery slide activation via radio checked */
#img-1:checked ~ .gallery-main .slide-1 {
  opacity: 1;
  z-index: 10;
}

#img-2:checked ~ .gallery-main .slide-2 {
  opacity: 1;
  z-index: 10;
}

#img-3:checked ~ .gallery-main .slide-3 {
  opacity: 1;
  z-index: 10;
}

#img-4:checked ~ .gallery-main .slide-4 {
  opacity: 1;
  z-index: 10;
}

/* Thumbnail active borders */
#img-1:checked ~ .thumbnails label[for="img-1"] {
  border-color: var(--primary);
  background-color: var(--secondary);
}

#img-2:checked ~ .thumbnails label[for="img-2"] {
  border-color: var(--primary);
  background-color: var(--secondary);
}

#img-3:checked ~ .thumbnails label[for="img-3"] {
  border-color: var(--primary);
  background-color: var(--secondary);
}

#img-4:checked ~ .thumbnails label[for="img-4"] {
  border-color: var(--primary);
  background-color: var(--secondary);
}

/* CTA Button Styling */
.cta-button {
  min-height: 44px;
  background-color: var(--primary);
  color: #ffffff;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

.cta-button:hover {
  background-color: #5b21b6;
}

.cta-button:active {
  transform: scale(0.99);
}

/* Mobile first layout adjustments */
img {
  max-width: 100%;
  height: auto;
}