*,
*::before,
*::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; padding: 0; }

:root {
  --bg: #0a0a0f;
  --fg: #e9e9f5;
  --card: rgba(255,255,255,.08);
  --card-strong: rgba(255,255,255,.12);
  --purple: #7c3aed;
  --purple-dark: #5b21b6;
  --blur: 6px;
  --shadow: 0 12px 28px rgba(0,0,0,.4);
}

body {
  color: var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial;
  background-color: var(--bg);
  /* gray diagonal lines background */
  background-image: repeating-linear-gradient(
    135deg,
    rgba(128,128,128,.22) 0 1px,
    transparent 1px 40px
  );
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

main {
  width: min(1100px, 92%);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 0;
}

.image-frame {
  width: 100%;
  max-width: 900px;
  border-radius: 18px;
  overflow: hidden;
  position: relative;
  background: rgba(18,18,26,.65);
  box-shadow: var(--shadow);
}

.image-frame img {
  width: 100%;
  height: auto;
  display: block;
  /* slight cyberpunk hue */
  filter: saturate(1.05) contrast(1.05);
}

/* frosted glass overlay on the hero to evoke hacker/cyberpunk vibe */
.image-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(140, 92, 246, .28), rgba(0,0,0,.28));
  backdrop-filter: blur(var(--blur)) saturate(120%);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(120%);
  pointer-events: none;
  z-index: 1;
  mix-blend-mode: screen;
}

/* footer with frosted glass promo card */
footer {
  width: min(1100px, 92%);
  padding: 1.5rem 0 2rem;
  text-align: center;
}

.product-ad {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: 1rem;
  width: min(520px, 90%);
  border-radius: 14px;
  background: var(--card);
  border: 1px solid rgba(255,255,255,.15);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  margin: 0.75rem auto;
}

.product-ad h3 {
  margin: 0;
  font-size: 1rem;
  color: #e8e0ff;
  letter-spacing: .3px;
}

.product-ad p { margin: 0; color: #d9d9e6; }

.product-ad a {
  text-decoration: none;
  display: inline-block;
  padding: .75rem 1.25rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #6d28d9, #8b5cf6);
  color: #fff;
  font-weight: 700;
  border: 1px solid rgba(255,255,255,.25);
  transition: transform .2s ease;
}
.product-ad a:hover { transform: translateY(-1px); }
.product-ad a:focus-visible { outline: 3px solid #a78bfa; outline-offset: 2px; }

p { margin: .25rem 0; }

@media (min-width: 768px) {
  main { padding: 3rem 0 2rem; }
  .image-frame { border-radius: 22px; }
  .image-frame::before {
    background: linear-gradient(135deg, rgba(140,92,246,.32), rgba(0,0,0,.32));
  }
  .product-ad { margin-top: 1.5rem; }
}