:root {
  --bg: #000000;
  --bg-soft: #0c0c0c;
  --fg: #ffffff;
  --muted: #9a9a9a;
  --dim: #5c5c5c;
  --line: #222222;
  --line-strong: #3a3a3a;
  --hover: #111111;
  --font: "IBM Plex Mono", ui-monospace, monospace;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
  letter-spacing: -0.015em;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

/* Atmosphere */
.bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, #1a1a1a 0%, transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 100%, #121212 0%, transparent 50%),
    #000;
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 20%, transparent 75%);
}

.bg-glow {
  position: absolute;
  top: -20%;
  left: 50%;
  width: 70vw;
  height: 50vh;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(255, 255, 255, 0.06), transparent 65%);
  animation: pulse 8s ease-in-out infinite;
}

.bg-noise {
  position: absolute;
  inset: 0;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.shell {
  position: relative;
  z-index: 1;
  width: min(760px, calc(100% - 2.5rem));
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.site-header {
  padding: 4rem 0 2.75rem;
  animation: rise 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 1.75rem;
  color: var(--dim);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--fg);
  box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.5);
  animation: blink 2.4s ease-in-out infinite;
}

.brand {
  display: block;
  color: var(--fg);
  text-decoration: none;
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 1.05;
  transition: opacity 0.2s ease;
}

.brand:hover {
  opacity: 0.75;
}

.tagline {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 400;
  max-width: 28ch;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0.35rem;
  padding: 0.3rem;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  animation: rise 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.1s both;
}

.tab {
  appearance: none;
  flex: 1;
  background: transparent;
  border: 1px solid transparent;
  color: var(--dim);
  font: inherit;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.85rem 1rem;
  cursor: pointer;
  transition:
    color 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease;
}

.tab:hover {
  color: var(--fg);
}

.tab.is-active {
  color: var(--bg);
  background: var(--fg);
  border-color: var(--fg);
}

.tab:focus-visible {
  outline: 1px solid var(--fg);
  outline-offset: 3px;
}

/* Panels */
.panel {
  padding: 1.5rem 0 2.5rem;
  flex: 1;
  animation: rise 0.45s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.panel[hidden] {
  display: none;
}

.product-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.product {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "meta price"
    "desc price";
  gap: 0.4rem 1.5rem;
  align-items: center;
  padding: 1.25rem 1.2rem;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.015);
  transition:
    border-color 0.2s ease,
    background 0.2s ease,
    transform 0.2s ease;
}

.product:hover {
  border-color: var(--line-strong);
  background: var(--hover);
  transform: translateX(4px);
}

.product-meta {
  grid-area: meta;
}

.sku {
  display: block;
  color: var(--dim);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.product h2 {
  margin: 0;
  color: var(--fg);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.product p {
  grid-area: desc;
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  max-width: 38ch;
  line-height: 1.5;
}

.price {
  grid-area: price;
  color: var(--fg);
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
  padding: 0.4rem 0.65rem;
  border: 1px solid var(--line-strong);
}

/* Footer */
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  animation: rise 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.18s both;
}

.footer-right {
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.55;
  }
  50% {
    opacity: 1;
  }
}

@keyframes blink {
  0%,
  100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.35);
  }
  50% {
    opacity: 0.35;
    box-shadow: 0 0 0 6px rgba(255, 255, 255, 0);
  }
}

@media (max-width: 560px) {
  .shell {
    width: calc(100% - 1.75rem);
  }

  .site-header {
    padding-top: 3rem;
  }

  .product {
    grid-template-columns: 1fr;
    grid-template-areas:
      "meta"
      "desc"
      "price";
    gap: 0.55rem;
  }

  .price {
    justify-self: start;
    margin-top: 0.25rem;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}