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

html, body { height: 100%; }

:root {
  --green: #39ff14;
}

html {
  color-scheme: dark;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial;
  min-height: 100vh;
  color: #eafff0;
  background: #0a1a38;
  background-image:
    radial-gradient(circle at 15% 10%, rgba(0, 180, 120, 0.25) 0%, transparent 40%),
    radial-gradient(circle at 85% 60%, rgba(0, 120, 255, 0.25) 0%, transparent 40%);
  background-repeat: no-repeat;
  background-size: cover;
  line-height: 1.45;
}

a { color: var(--green); text-decoration: none; }

main {
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
  min-height: calc(100vh - 120px);
}

.image-frame {
  width: min(92vw, 720px);
  aspect-ratio: 16 / 9;
  border-radius: 14px;
  overflow: hidden;
  background: rgba(10, 18, 36, 0.65);
  border: 1px solid rgba(57, 255, 180, 0.25);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 12px 40px rgba(0,0,0,.45);
  position: relative;
}
.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  image-rendering: auto;
  filter: saturate(1.05);
}
.image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(57,255,180,.25);
  pointer-events: none;
  box-shadow: inset 0 0 0 rgba(0,0,0,0);
  /* subtle glow edge for hacker vibe */
  outline: 0;
}

footer {
  padding: 1.75rem 1rem;
  text-align: center;
  color: rgba(210,255,230,.9);
}

.product-ad {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  padding: .75rem;
  border-radius: 12px;
  background: rgba(8,12,22,0.65);
  border: 1px solid rgba(0,255,170,.25);
  width: min(100%, 520px);
  margin: 0 auto;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.product-ad h3 {
  font-size: .95rem;
  margin: 0;
  color: #b9ffd9;
}
.product-ad a {
  display: inline-block;
  width: 100%;
}
.product-ad a p {
  margin: 0;
  padding: .8rem 1rem;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(0,170,80,.95), rgba(0,120,60,.95));
  color: #06220e;
  font-weight: 700;
  text-align: center;
}
.product-ad a:focus-visible p {
  outline: 2px solid #9DFF8A;
  outline-offset: 2px;
}

@media (min-width: 600px) {
  main { padding: 3rem 1.75rem; }
  .image-frame { border-radius: 18px; }
}

@media (min-width: 900px) {
  footer { padding: 2rem 0.5rem; }
  .product-ad { width: 540px; }
  .product-ad h3 { font-size: 1rem; }
}