/* Light reset & base */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
:root {
  --bg: #0b0f14;
  --surface: rgba(255,255,255,.08);
  --surface-2: rgba(255,255,255,.14);
  --text: #eaf4ff;
  --muted: #a8b5cf;
  --coral: #ff6a5a;
  --glow: 0 0 18px rgba(255, 106, 90, 0.6);
}
html, body { font-family: system-ui, -apple-system, "Segoe UI", Roboto, Inter, Arial; color: var(--text); background: var(--bg); }

/* Silver diagonal background + frosted cyber vibe */
body {
  background-color: var(--bg);
  /* silver diagonal lines background (hacker-cyberpunk aesthetic) */
  background-image:
    repeating-linear-gradient(135deg, rgba(190,190,190,.25) 0 2px, rgba(190,190,190,0) 2px 6px),
    repeating-linear-gradient(315deg, rgba(170,170,170,.25) 0 2px, rgba(170,170,170,0) 2px 6px);
  background-size: auto;
  min-height: 100vh;
  line-height: 1.4;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 20% 20%, rgba(255,140,100,.08), transparent 40%),
              radial-gradient(circle at 80% 40%, rgba(0,255,255,.08), transparent 40%);
  filter: saturate(120%);
  z-index: 0;
  mix-blend-mode: screen;
}

/* Layout containers */
header {
  position: relative;
  z-index: 1;
  margin: 2rem auto;
  width: min(920px, 92%);
  padding: 2.5rem 1.25rem;
  text-align: center;
  border-radius: 14px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.18);
  box-shadow: 0 12px 40px rgba(0,0,0,.45);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
header h1 {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 3rem);
  line-height: 1.05;
  color: #f7fbff;
  text-shadow: 0 0 10px rgba(255,106,90,.6);
}
main { padding: 0 1rem 2rem; }
.image-frame {
  width: min(720px, 100%);
  margin: 1.75rem auto 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.04);
  box-shadow: 0 8px 28px rgba(0,0,0,.4);
}
.image-frame img { display: block; width: 100%; height: auto; }

/* Footer / CTA area (prominent CTA via the ad card) */
footer {
  text-align: center;
  padding: 1.75rem 1rem 2.75rem;
  color: var(--muted);
  position: relative;
  z-index: 1;
}
.product-ad {
  display: inline-block;
  text-align: left;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 12px;
  padding: .75rem 1rem;
  margin-bottom: .75rem;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.product-ad h3 {
  margin: 0 0 .25rem;
  font-size: 1.05rem;
  color: #f3f7ff;
}
.product-ad a {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .55rem .9rem;
  border-radius: 999px;
  text-decoration: none;
  color: #fff;
  font-weight: 700;
  background: linear-gradient(135deg, var(--coral), #ff8a7b);
  box-shadow: 0 4px 12px rgba(0,0,0,.4);
}
.product-ad a:focus-visible {
  outline: 2px solid #ffd54f;
  outline-offset: 2px;
}
.product-ad a:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(0,0,0,.5);
}
.product-ad p { margin: 0; }

/* Focus accessibility for all interactive elements (default to anchor CTA) */
a, button {
  outline: none;
}
a:focus-visible, button:focus-visible {
  outline: 2px solid #ffd54f;
  outline-offset: 2px;
  border-radius: 4px;
}
@media (min-width: 640px) {
  header { padding: 3rem 1.5rem; }
  .image-frame { width: 80%; }
  footer { padding-bottom: 3rem; }
  .product-ad { margin: 1.25rem auto; }
}
@media (min-width: 900px) {
  header { padding: 4rem 2rem; }
  header h1 { font-size: 2.25rem; }
  main { padding: 2rem 0; display: block; }
  .image-frame { width: 70%; }
} 

/* Subtle cyber-glow on header text for futuristic feel */
header h1 {
  text-shadow: 0 0 12px rgba(255, 106, 90, 0.55), 0 0 24px rgba(255, 106, 90, 0.25);
}