/* CSS Variables for Theme Consistency */
:root {
  --primary: #115e59;
  --secondary: #f0fdfa;
  --accent: #fbbf24;
  --text: #042f2e;
  --bg: #ffffff;
}

/* Screen Reader Utility (Strictly Required for Pure CSS Gallery) */
.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 Typography using Clamp */
h1 {
  font-size: clamp(20px, 4vw, 24px);
}

h2 {
  font-size: clamp(22px, 5vw, 36px);
}

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

/* Interactive Pure CSS Gallery */
.gallery-main {
  position: relative;
  width: 100%;
  padding-bottom: 100%; /* Forces a perfect square aspect ratio */
  overflow: hidden;
}

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

/* Gallery Control Logic via Checked States */
#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;
}

/* Active Thumbnail Styling */
#img-1:checked ~ .thumbnails label[for="img-1"] {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(17, 94, 89, 0.2);
}

#img-2:checked ~ .thumbnails label[for="img-2"] {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(17, 94, 89, 0.2);
}

#img-3:checked ~ .thumbnails label[for="img-3"] {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(17, 94, 89, 0.2);
}

#img-4:checked ~ .thumbnails label[for="img-4"] {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(17, 94, 89, 0.2);
}