/* CSS Custom Properties */
:root {
  --primary: #dc2626;
  --secondary: #fef2f2;
  --accent: #2563eb;
  --text: #450a0a;
  --bg: #ffffff;
}

/* Accessibility & Utility */
.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;
}

/* Page styles based on CLEAN-WHITE Design System */
body {
  background: var(--bg);
  color: #111;
}

section {
  padding: 48px 16px;
}

@media (min-width: 768px) {
  section {
    padding: 64px 16px;
  }
}

.card {
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  box-shadow: none;
}

.btn {
  border-radius: 6px;
  font-weight: 600;
  min-height: 44px;
}

h1, h2 {
  font-weight: 700;
}

/* Typography clamp settings */
p, span, label, li {
  font-size: clamp(14px, 4vw, 16px);
}

h1 {
  font-size: clamp(20px, 5vw, 24px);
}

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

/* CSS-Only Gallery Implementation */
.gallery-main {
  position: relative;
  width: 100%;
  padding-bottom: 100%; /* Strict height constraint */
  overflow: hidden;
}

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

/* Checked states displaying the appropriate slides */
#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 borders based on active state */
#img-1:checked ~ .thumbnails label[for="img-1"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

#img-2:checked ~ .thumbnails label[for="img-2"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

#img-3:checked ~ .thumbnails label[for="img-3"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

#img-4:checked ~ .thumbnails label[for="img-4"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}