:root {
  --primary: #0d9488;
  --secondary: #f0fdfa;
  --accent: #f59e0b;
  --text: #134e4a;
  --bg: #ffffff;
}

body {
  background: #fff;
  color: #000;
  font-family: 'Public Sans', sans-serif;
}

section {
  padding: 64px 16px;
}

h1, h2 {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.1;
  text-transform: uppercase;
}

.card {
  border-left: 4px solid #000;
  padding-left: 20px;
  border-radius: 0;
}

.btn {
  border-radius: 0;
  border: 2px solid #000;
  font-weight: 700;
  text-transform: uppercase;
}

/* Visually Hidden Helper for Gallery Radios */
.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;
}

/* Gallery CSS Rules */
.gallery-main {
  position: relative;
  width: 100%;
  padding-bottom: 100%;
  overflow: hidden;
}

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

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

#img-1:checked ~ .thumbnails label[for="img-1"],
#img-2:checked ~ .thumbnails label[for="img-2"],
#img-3:checked ~ .thumbnails label[for="img-3"],
#img-4:checked ~ .thumbnails label[for="img-4"] {
  border-color: var(--primary);
  outline: 2px solid var(--primary);
}