/* Light reset and base variables */
*,
*::before,
*::after { box-sizing: border-box; }

html, body { height: 100%; }

:root {
  --navy: #0a1020;
  --navy-deep: #090b1a;
  --beige-1: #f6e2cb;
  --beige-2: #e7d4b0;
  --beige-3: #d8c5a0;
  --glass: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.25);
  --text: #0b132b;
  --cyan: #00e5ff;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  color: var(--text);
  /* Beige gradient background for a cyber-beige vibe */
  background: linear-gradient(135deg, var(--beige-1) 0%, var(--beige-2) 50%, var(--beige-3) 100%);
  display: flex;
  flex-direction: column;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial;
}

/* Global focus outline for accessibility */
:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 2px;
}

/* Header (futuristic, frosted look) */
header {
  position: sticky;
  top: 0;
  z-index: 4;
  width: 100%;
  backdrop-filter: blur(6px) saturate(1.2);
  background: rgba(10, 15, 40, 0.65); /* navy glass */
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  padding: 1rem 1rem;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: clamp(1.25rem, 5vw, 2rem);
  color: #eaf3ff;
  letter-spacing: .5px;
  text-shadow: 0 1px 0 rgba(0,0,0,.15);
}

/* Main content area (centered hero image) */
main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 1rem;
}

.image-frame {
  width: min(720px, 92%);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 20px;
  padding: 1rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(6px);
  display: block;
}

.image-frame img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  filter: saturate(1.02);
}

/* Footer with frosted glass panel and CTA */
footer {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  background: rgba(9, 12, 40, 0.65);
  color: #eaf3ff;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.product-ad {
  text-align: center;
  padding: 0.75rem 1rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(6px);
  width: min(680px, 90%);
}

.product-ad h3 {
  font-size: 1rem;
  margin: 0 0 0.25rem 0;
}

.product-ad a {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #0b1a2b, #1b2a49);
  color: #e9f4ff;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 6px 14px rgba(0,0,0,0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.product-ad a:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(0,0,0,0.3);
}

.product-ad a:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 2px;
}

footer p {
  font-size: 0.8rem;
  opacity: 0.9;
  margin: 0;
}

/* Small screens adjustments (mobile-first) */
@media (max-width: 600px) {
  header { padding: 0.75rem; }
  .image-frame { padding: 0.75rem; border-radius: 16px; }
  .product-ad { width: 100%; }
}