:root{
  --bg: #0b0b0f;
  --panel: rgba(17,17,24,.84);
  --panel-soft: rgba(255,255,255,.03);
  --text: #f4f6f8;
  --muted: rgba(244,246,248,.74);
  --line: rgba(244,246,248,.14);
  --cortex: #39ff14;
  --shadow: 0 12px 30px rgba(0,0,0,.42);
  --radius: 22px;
  --max: 1120px;
  --focus: 0 0 0 3px rgba(57,255,20,.35);
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  line-height: 1.5;
  background:
    radial-gradient(850px 520px at 10% 0%, rgba(57,255,20,.09), transparent 58%),
    radial-gradient(700px 500px at 100% 10%, rgba(57,255,20,.06), transparent 60%),
    linear-gradient(180deg, #0b0b0f 0%, #090a0d 100%);
}

a{ color: inherit; text-decoration: none; }
.wrap{ max-width: var(--max); margin: 0 auto; padding: 0 18px; }
:focus-visible{ outline: none; box-shadow: var(--focus); border-radius: 12px; }

header{
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(11,11,15,.78);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
}
.brand{
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand img{
  width: 42px;
  height: 42px;
  object-fit: contain;
  filter: drop-shadow(0 8px 18px rgba(0,0,0,.35));
}
.brand-name{
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.brand-name strong{ font-size: 15px; letter-spacing: .5px; }
.brand-name span{ font-size: 12px; color: var(--muted); }
.header-actions{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(17,17,24,.55);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: transform .14s ease, border-color .14s ease, background .14s ease;
}
.btn:hover{
  transform: translateY(-1px);
  border-color: rgba(57,255,20,.55);
  background: rgba(57,255,20,.08);
}
.btn.primary{
  border-color: rgba(57,255,20,.8);
  background: linear-gradient(180deg, rgba(57,255,20,.18), rgba(57,255,20,.06));
  color: #fff;
  box-shadow: 0 12px 26px rgba(57,255,20,.12);
}

main{ padding: 22px 0 40px; }
.breadcrumb{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 14px;
  flex-wrap: wrap;
}

.product-shell{
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
  gap: 24px;
  align-items: start;
}
.product-media,
.product-info,
.info-card,
.feature-card{
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.product-media{
  overflow: hidden;
  padding: 18px;
  background:
    linear-gradient(135deg, rgba(57,255,20,.08), transparent 36%),
    #0e1014;
}
.media-gallery{
  display: grid;
  gap: 14px;
}
.media-top{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}
.badge{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid rgba(57,255,20,.35);
  background: rgba(57,255,20,.10);
  font-size: 13px;
}
.price-pill{
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid rgba(244,246,248,.14);
  color: var(--text);
  font-size: 13px;
  background: rgba(0,0,0,.18);
}
.product-media img{
  display: block;
  width: 100%;
  max-width: 540px;
  margin: 0 auto;
  border-radius: 18px;
  background: #fff;
  object-fit: contain;
  box-shadow: 0 22px 40px rgba(0,0,0,.30);
}
.gallery-secondary{
  display: grid;
  gap: 12px;
}
.gallery-secondary img{
  max-width: 100%;
  min-height: 180px;
}

.product-info{
  padding: 22px;
}
.kicker{
  color: var(--cortex);
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
}
h1{
  margin: 10px 0 12px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.02;
}
.lead{
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 1.03rem;
}
.price{
  margin: 0 0 18px;
  font-size: 2rem;
  color: var(--cortex);
  text-shadow: 0 0 22px rgba(57,255,20,.16);
}
.actions{
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.share-feedback{
  min-height: 20px;
  margin: -8px 0 18px;
  color: var(--muted);
  font-size: 13px;
}

.info-grid{
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}
.info-card{
  padding: 14px;
  background: var(--panel-soft);
}
.info-card strong{
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
}
.info-card span{
  color: var(--muted);
  font-size: 14px;
}

.content-grid{
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 24px;
  margin-top: 24px;
}
.feature-card{
  padding: 22px;
}
.feature-card h2{
  margin: 0 0 14px;
  font-size: 1.3rem;
}
.feature-card p{
  margin: 0 0 14px;
  color: var(--muted);
}
.feature-list{
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.feature-list li{
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(244,246,248,.10);
  background: rgba(255,255,255,.02);
}
.note{
  margin-top: 14px;
  padding: 14px;
  border-radius: 16px;
  border: 1px solid rgba(57,255,20,.22);
  background: rgba(57,255,20,.08);
  color: rgba(244,246,248,.92);
}

footer{
  padding: 20px 0 40px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 920px){
  .product-shell,
  .content-grid{
    grid-template-columns: 1fr;
  }
  .info-grid{
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px){
  .topbar{
    flex-direction: column;
    align-items: stretch;
  }
  .header-actions{
    justify-content: stretch;
  }
  .header-actions .btn,
  .actions .btn{
    width: 100%;
  }
  .product-info{
    padding: 18px;
  }
}