:root {
  --bg: #090b0f;
  --surface: #121722;
  --surface-2: #171e2a;
  --line: #293244;
  --text: #e9edf3;
  --muted: #9aa7bd;
  --accent: #49f3af;
  --accent-2: #48c6ff;
  --danger: #ff6f6f;
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: Inter, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(circle at top, #121827 0%, var(--bg) 55%);
  color: var(--text);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(10, 12, 17, 0.8);
  border-bottom: 1px solid rgba(73, 243, 175, 0.15);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.86rem;
}

.nav-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 0.92rem;
  color: var(--muted);
}

.nav-links a:hover {
  color: var(--text);
}

.hero {
  display: grid;
  gap: 20px;
  padding: 38px 0 26px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.8rem, 6vw, 3rem);
  line-height: 1.06;
}

.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 1.03rem;
  max-width: 68ch;
}

.hero-grid {
  display: grid;
  gap: 20px;
}

.hero-image {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, #182133, #11161f);
  overflow: hidden;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0 4px;
}

.badge {
  border: 1px solid rgba(73, 243, 175, 0.4);
  color: var(--accent);
  border-radius: 999px;
  padding: 6px 11px;
  font-size: 0.82rem;
  font-weight: 600;
}

.section {
  padding: 22px 0;
}

.section h2 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: clamp(1.3rem, 4vw, 2rem);
}

.section p.lead {
  margin-top: 0;
  color: var(--muted);
}

.product-grid {
  display: grid;
  gap: 14px;
}

.card {
  background: linear-gradient(150deg, var(--surface), var(--surface-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: grid;
  gap: 12px;
}

.card-body {
  padding: 14px;
  display: grid;
  gap: 9px;
}

.card h3 {
  margin: 0;
  font-size: 1.15rem;
}

.price {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.meta {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.button-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.button,
button {
  border: none;
  background: linear-gradient(110deg, var(--accent), var(--accent-2));
  color: #04111a;
  font-weight: 700;
  border-radius: 10px;
  padding: 11px 14px;
  cursor: pointer;
  transition: transform 0.12s ease, filter 0.12s ease;
}

.button.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
}

.button:hover,
button:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

.button[disabled],
button[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

.notice {
  margin-top: 10px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  background: rgba(73, 243, 175, 0.08);
  border-radius: 10px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 0.92rem;
}

.notice.error {
  border-left-color: var(--danger);
  background: rgba(255, 111, 111, 0.09);
}

.spec-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.5;
}

footer {
  margin-top: 26px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.footer-inner {
  padding: 20px 0 34px;
  font-size: 0.88rem;
}

@media (min-width: 760px) {
  .hero-grid {
    grid-template-columns: 1.08fr 0.92fr;
    align-items: center;
  }

  .product-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}