:root {
  --color-bg: #270c46;
  --color-surface: #302c47;
  --color-text: #e6f8ff;
  --color-text-muted: #a0fdc4;
  --color-accent: #1ba7c0;
  --color-accent-soft: #18460686;
  --color-border: #0f2b1a;
  --font-display: "Courier New", Courier, monospace;
  --font-body: "Courier New", Courier, monospace;
  --shadow-sm: 0 1px 2px rgba(28, 25, 23, 0.06);
  --shadow-md: 0 8px 24px rgba(28, 25, 23, 0.08);
  --radius: 12px;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(18, 19, 41, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.site-nav {
  display: flex;
  gap: 2rem;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color 0.2s;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: transform 0.2s;
}

/* Hero */
.hero {
  padding: 4rem 0 5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 600;
  line-height: 1.1;
  margin: 0 0 1.25rem;
  letter-spacing: -0.02em;
}

.hero-text {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 42ch;
  margin: 0 0 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--color-text);
  color: var(--color-bg);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.hero-visual {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: calc(var(--radius) * 2);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Sections */
.section {
  padding: 4rem 0;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 600;
  margin: 0;
}

.section-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-accent);
}

.section-link:hover {
  text-decoration: underline;
}

/* Product grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.product-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: transform 0.2s, box-shadow 0.2s;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.product-card__image-wrap {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--color-accent-soft);
}

.product-card__image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.product-card:hover .product-card__image-wrap img {
  transform: scale(1.04);
}

.product-card__category {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.92);
  border-radius: 999px;
}

.product-card__body {
  padding: 1rem 1.125rem 1.25rem;
}

.product-card__name {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
  line-height: 1.35;
}

.product-card__price {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* About strip */
.about-strip {
  background: var(--color-surface);
  border-block: 1px solid var(--color-border);
  padding: 3rem 0;
}

.about-strip-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  text-align: center;
}

.about-strip h3 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  margin: 0 0 0.5rem;
}

.about-strip p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* Catalog page */
.page-header {
  padding: 3rem 0 2rem;
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.page-header p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1.0625rem;
}

.filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.filter-btn {
  padding: 0.5rem 1rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: all 0.15s;
}

.filter-btn:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}

.filter-btn.is-active {
  background: var(--color-text);
  border-color: var(--color-text);
  color: var(--color-bg);
}

/* Product detail */
.product-detail {
  padding: 2rem 0 4rem;
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.product-detail__image {
  aspect-ratio: 1;
  border-radius: calc(var(--radius) * 1.5);
  overflow: hidden;
  background: var(--color-accent-soft);
  box-shadow: var(--shadow-md);
}

.product-detail__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-detail__category {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.product-detail h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 1rem;
}

.product-detail__price {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 1.5rem;
}

.product-detail__description {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  margin: 0 0 2rem;
  max-width: 48ch;
}

.product-detail__details {
  margin: 0 0 2rem;
  padding: 0;
  list-style: none;
}

.product-detail__details li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--color-text-muted);
}

.product-detail__details li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.availability-note {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--color-accent-soft);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  color: var(--color-text);
}

.availability-note::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.back-link:hover {
  color: var(--color-text);
}

.empty-state,
.not-found {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--color-text-muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 0;
  margin-top: 2rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
}

.footer-text {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 0.5rem 1rem 1rem;
    display: none;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav .nav-link {
    padding: 0.75rem 0;
  }

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

  .hero {
    padding-top: 2.5rem;
  }

  .hero-visual {
    order: -1;
    max-height: 360px;
    aspect-ratio: 16 / 10;
  }

  .about-strip-inner {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }
}