/* Design System Variables */
:root {
  --primary: #4338ca;
  --secondary: #eef2ff;
  --accent: #f97316;
  --text: #f5f5f5;
  --bg: #0f0f0f;
}

/* Base resets */
body {
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

section {
  padding: 48px 16px;
}

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

.card {
  background: #1a1a1a;
  border: 1px solid #333;
  border-radius: 12px;
}

.btn {
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
  transition: background-color 0.2s ease, transform 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
}

.btn:hover {
  background: #ea580c; /* Darker accent */
}

h1 {
  font-weight: 800;
}

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

h1, h2 {
  font-size: clamp(20px, 5vw, 32px);
}

/* Screen reader only helper */
.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;
}

/* CSS Gallery Engine (No JS) */
.gallery-main {
  position: relative;
  width: 100%;
  padding-bottom: 100%; /* Forces 1:1 Aspect Ratio */
  overflow: hidden;
}

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

/* Gallery Engine State Switching */
#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 States */
#img-1:checked ~ .thumbnails label[for="img-1"] {
  border-color: var(--accent);
}
#img-2:checked ~ .thumbnails label[for="img-2"] {
  border-color: var(--accent);
}
#img-3:checked ~ .thumbnails label[for="img-3"] {
  border-color: var(--accent);
}
#img-4:checked ~ .thumbnails label[for="img-4"] {
  border-color: var(--accent);
}