*,
*::before,
*::after { box-sizing: border-box; }

:root {
  --bg: #0a0f1a;
  --surface: rgba(255, 255, 255, 0.08);
  --surface-strong: rgba(255, 255, 255, 0.14);
  --text: #e8f2ff;
  --muted: #cbdfff;
  --blue: #4f9cff;
  --blue-deep: #0b4bd0;
  --olive: #6b8e23;
  --shadow: rgba(0, 0, 0, 0.45);
}

html, body { height: 100%; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Inter, Arial;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background-color: var(--bg);
  /* olive dot pattern background */
  background-image:
    radial-gradient(circle at 1px 1px, var(--olive) 1px, transparent 1.5px);
  background-size: 12px 12px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
  min-height: calc(100vh - 140px);
}

.image-frame {
  width: min(100%, 900px);
  aspect-ratio: 16 / 9;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  display: flex;
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(1.05);
}

footer {
  text-align: center;
  padding: 1.75rem 1rem 2rem;
  color: #dbeaff;
}

.product-ad {
  display: inline-block;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15);
  margin-bottom: 0.75rem;
}

.product-ad h3 {
  font-size: 0.95rem;
  margin: 0 0 6px;
  color: #e9f2ff;
  font-weight: 700;
  letter-spacing: .3px;
  text-shadow: 0 0 6px rgba(70, 170, 255, 0.6);
}

.product-ad a {
  text-decoration: none;
  display: inline-block;
  padding: 10px 14px;
  border-radius: 8px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: linear-gradient(135deg, rgba(34, 150, 255, 0.95), rgba(12, 60, 180, 0.95));
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.product-ad a:focus-visible {
  outline: 2px solid #9de2ff;
  outline-offset: 2px;
}

.product-ad a:hover {
  filter: brightness(1.05);
}

footer p { margin: 0.5rem 0 0; font-size: 0.85rem; opacity: 0.8; }

a, button { color: #cde6ff; }

a:focus-visible, button:focus-visible {
  outline: 2px solid #9de2ff;
  outline-offset: 2px;
  border-radius: 4px;
}

/* Responsive tweaks (mobile-first) */
@media (min-width: 720px) {
  main { padding: 3rem 1rem; }
  .image-frame { border-radius: 20px; }
  footer { padding-bottom: 2rem; }
}