:root { 
  --bg-silver-1: #dbe0e6;
  --bg-silver-2: #cbd5e1;
  --bg-silver-3: #e7ebf1;
  --violet-500: #7c3aed;
  --violet-400: #8b5cf6;
  --glass: rgba(255,255,255,0.15);
  --glass-border: rgba(255,255,255,0.4);
  --text: #e5e7eb;
  --shadow: 0 8px 24px rgba(0,0,0,.25);
}

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

html, body { height: 100%; }

body {
  margin: 0;
  padding: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, Arial;
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  /* Silver gradient with violet haze for hacker vibe */
  background: 
    linear-gradient(135deg, rgba(124,58,237,0.18), rgba(0,0,0,0) 60%),
    linear-gradient(135deg, #dbe0e6 0%, #e3e7ed 40%, #cbd5e1 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  display: grid;
  place-items: center;
  padding: 3rem 1rem;
  min-height: calc(100vh - 140px);
}

.image-frame {
  width: min(92vw, 720px);
  padding: 1rem;
  border-radius: 20px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.4);
  box-shadow: 0 20px 40px rgba(0,0,0,.25);
  backdrop-filter: blur(8px) saturate(1.2);
  -webkit-backdrop-filter: blur(8px) saturate(1.2);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.image-frame img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  filter: saturate(1.05);
  /* subtle violet glow around image frame for hacker look */
  box-shadow: 0 0 0 2px rgba(124,58,237,0.15);
}

footer {
  padding: 1.75rem 1rem;
  text-align: center;
  color: #d1d5db;
}

.product-ad {
  margin: 0 auto 1rem;
  width: min(92vw, 520px);
  padding: .75rem;
  border-radius: 14px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.4);
  backdrop-filter: blur(8px) saturate(1.2);
  -webkit-backdrop-filter: blur(8px) saturate(1.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  box-shadow: var(--shadow);
}

.product-ad h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: #e9e6ff;
  text-shadow: 0 0 6px rgba(124,58,237,.75);
  display: inline-flex;
  align-items: center;
  gap: .5rem;
}

.product-ad a {
  text-decoration: none;
  width: 100%;
  display: inline-block;
}

.product-ad p {
  margin: 0;
  padding: .65rem 1rem;
  width: 100%;
  text-align: center;
  border-radius: 999px;
  background: linear-gradient(90deg, #6d28d9, #7c3aed);
  color: white;
  font-weight: 700;
  letter-spacing: .2px;
  border: 0;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease;
  box-shadow: 0 6px 16px rgba(124,58,237,.5);
}
.product-ad p:hover { transform: translateY(-1px); }

.product-ad a:focus-visible { outline: 3px solid #fff; outline-offset: 2px; border-radius: 999px; }

@media (min-width: 768px) {
  main { padding: 4rem 2rem; }
  .image-frame { width: 60%; }
  footer { padding: 2rem 0; }
  .product-ad { width: 420px; }
}

@media (min-width: 1024px) {
  .image-frame { width: 50%; }
  .product-ad { width: 480px; }
}