:root {
  --bg0: #070a12;
  --bg1: #0b1024;
  --card: rgba(255, 255, 255, 0.06);
  --card2: rgba(255, 255, 255, 0.08);
  --stroke: rgba(255, 255, 255, 0.12);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.64);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --radius: 18px;
  --easing: cubic-bezier(0.2, 0.8, 0.2, 1);
  --dur: 320ms;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family:
    Inter,
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    Arial,
    sans-serif;
  color: var(--text);
  background:
    radial-gradient(1100px 750px at 12% 15%, rgba(124, 58, 237, 0.25), transparent 55%),
    radial-gradient(900px 700px at 82% 8%, rgba(6, 182, 212, 0.22), transparent 56%),
    radial-gradient(1200px 900px at 70% 88%, rgba(34, 197, 94, 0.18), transparent 55%),
    linear-gradient(180deg, var(--bg0), var(--bg1));
}

.shell {
  width: min(1020px, calc(100% - 40px));
  margin: 36px auto 64px;
}

.top {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand__mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.9), rgba(6, 182, 212, 0.9));
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.42);
  position: relative;
  overflow: hidden;
}

.brand__mark::after {
  content: '';
  position: absolute;
  inset: -50%;
  background: radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.35), transparent 55%);
  transform: rotate(22deg);
}

.brand__title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.brand__subtitle {
  font-size: 13px;
  color: var(--muted);
  margin-top: 2px;
}

.top__hint {
  font-size: 13px;
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.panel-wrap {
  border-radius: calc(var(--radius) + 8px);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.tabs {
  padding: 14px 14px 0;
}

.tabs__inner {
  display: flex;
  gap: 10px;
  overflow: auto;
  padding: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  scrollbar-width: thin;
}

.tab {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: rgba(255, 255, 255, 0.72);
  padding: 10px 12px;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition:
    background var(--dur) var(--easing),
    border-color var(--dur) var(--easing),
    color var(--dur) var(--easing),
    transform var(--dur) var(--easing);
}

.tab:hover {
  color: rgba(255, 255, 255, 0.92);
  transform: translateY(-1px);
}

.tab[aria-selected='true'] {
  color: rgba(255, 255, 255, 0.98);
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.14);
}

.tab:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.stage {
  position: relative;
  min-height: 420px;
  padding: 18px;
}

.product-panel {
  position: absolute;
  inset: 18px;
  opacity: 0;
  transform: translateX(var(--enter-x, 16px)) scale(0.992);
  transition:
    opacity var(--dur) var(--easing),
    transform var(--dur) var(--easing);
  pointer-events: none;
}

.product-panel.is-visible {
  opacity: 1;
  transform: translateX(0) scale(1);
  pointer-events: auto;
}

.product-panel.is-leaving {
  opacity: 0;
  transform: translateX(var(--leave-x, -16px)) scale(0.992);
  pointer-events: none;
}

.product {
  height: 100%;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.09);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
}

.product__visual {
  padding: 22px 22px 18px;
  position: relative;
  background:
    radial-gradient(1100px 480px at 0% 0%, rgba(255, 255, 255, 0.06), transparent 55%),
    linear-gradient(135deg, var(--accent-from, #7c3aed), var(--accent-to, #06b6d4));
}

.product__visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(340px 220px at 38% 35%, rgba(255, 255, 255, 0.22), transparent 55%),
    radial-gradient(600px 320px at 12% 70%, rgba(0, 0, 0, 0.25), transparent 55%);
  mix-blend-mode: overlay;
  opacity: 0.8;
}

.product__badge {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 11px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: rgba(255, 255, 255, 0.92);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.2px;
}

.product__badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
}

.product__title {
  position: relative;
  z-index: 1;
  font-size: 34px;
  line-height: 1.08;
  font-weight: 800;
  margin: 14px 0 8px;
  letter-spacing: -0.02em;
}

.product__tagline {
  position: relative;
  z-index: 1;
  font-size: 15px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
  margin: 0 0 14px;
}

.product__desc {
  position: relative;
  z-index: 1;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.82);
  margin: 0;
  max-width: 48ch;
}

.product__detail {
  padding: 20px 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.08), rgba(0, 0, 0, 0.18));
}

.feature-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.feature {
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.86);
  font-weight: 600;
  font-size: 13px;
  transform: translateY(6px);
  opacity: 0;
  transition:
    transform 420ms var(--easing),
    opacity 420ms var(--easing);
}

.product-panel.is-visible .feature {
  transform: translateY(0);
  opacity: 1;
}

.feature:nth-child(1) {
  transition-delay: 80ms;
}
.feature:nth-child(2) {
  transition-delay: 130ms;
}
.feature:nth-child(3) {
  transition-delay: 180ms;
}
.feature:nth-child(4) {
  transition-delay: 230ms;
}

.cta {
  margin-top: auto;
  padding-top: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.price {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.price__label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.66);
}

.price__value {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.btn {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.07);
  color: rgba(255, 255, 255, 0.92);
  font-weight: 800;
  font-size: 13px;
  cursor: pointer;
  transition:
    transform var(--dur) var(--easing),
    background var(--dur) var(--easing),
    border-color var(--dur) var(--easing);
}

.btn:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.11);
  border-color: rgba(255, 255, 255, 0.18);
}

.btn:active {
  transform: translateY(0);
}

@media (max-width: 860px) {
  .top {
    align-items: flex-start;
    flex-direction: column;
  }

  .product {
    grid-template-columns: 1fr;
  }

  .stage {
    min-height: 520px;
  }

  .product-panel {
    inset: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --dur: 0ms;
  }
  .feature {
    transition: none;
    transform: none;
    opacity: 1;
  }
  .tab,
  .product-panel {
    transition: none;
  }
}