/* Reset & root vars */
:root{
  --cyan: #00e5ff;
  --cyan-dark: #00bcd4;
  --indigo: #4f46e5;
  --indigo-dark: #3730a3;
  --glass: rgba(255,255,255,.15);
}
*,
*::before,
*::after{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Inter, Arial;
  background: var(--cyan);
  color: #0b1020;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a{ color: inherit; text-decoration: none; }

/* Layout: mobile-first, centered hero image with frosted glass feel */
main{
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
  min-height: 60vh;
}
.image-frame{
  width: min(92vw, 860px);
  aspect-ratio: 16/9;
  border-radius: 18px;
  overflow: hidden;
  position: relative;
  background: rgba(0,0,0,.15);
  border: 1px solid rgba(255,255,255,.25);
  box-shadow: 0 12px 40px rgba(0,0,0,.35);
  /* frosted glass vibe on top area */
  isolation: isolate;
}
.image-frame::after{
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 42%;
  background: rgba(255,255,255,.18);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  pointer-events: none;
}
.image-frame img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.image-frame{ outline: 2px solid rgba(0,255,255,.6); outline-offset: 0.5px; }

/* Footer with prominent CTA (Cyberpunk Indigo) */
footer{
  padding: 1.5rem 1rem;
  text-align: center;
  color: rgba(16,20,40,.9);
  background: rgba(255,255,255,.15);
  border-top: 1px solid rgba(0,0,0,.08);
}
.product-ad{
  display: inline-block;
  padding: .25rem;
  border-radius: 12px;
  background: rgba(255,255,255,.25);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,.4);
  margin-bottom: .75rem;
}
.product-ad h3{
  margin: 0 0 .5rem 0;
  font-size: .95rem;
  color: #0b1020;
  text-shadow: 0 0 6px rgba(79,70,229,.5);
  letter-spacing: .4px;
}
.product-ad a{ display: inline-block; }
.product-ad a p{
  display: inline-block;
  padding: .85rem 1.25rem;
  border-radius: 10px;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
  background: var(--indigo);
  box-shadow: 0 6px 14px rgba(0,0,0,.25);
  transition: transform .2s ease, box-shadow .2s ease;
}
.product-ad a:hover p{
  transform: translateY(-1px);
  box-shadow: 0 10px 18px rgba(0,0,0,.28);
}
.product-ad a:focus-visible{
  outline: 3px solid #fff;
  outline-offset: 2px;
  border-radius: 10px;
}
footer p{ margin: 0.75rem 0 0; }

/* Focus accessibility for all interactive elements */
:focus-visible{
  outline: 3px solid #fff;
  outline-offset: 2px;
  border-radius: 6px;
}
@media (min-width: 600px){
  main{ padding: 3rem 1.5rem; }
  .image-frame{ width: min(80vw, 900px); aspect-ratio: 16/9; }
}
@media (min-width: 900px){
  main{ padding: 4rem 2rem; }
  .image-frame{ width: min(720px, 60vw); }
}