:root {
  --white: #f7f9fc;
  --white-strong: #ffffff;
  --ink: #0a0f1a;
  --navy-900: #0b1d33;
  --navy-800: #102543;
  --navy-700: #183255;
  --navy-600: #1f3e66;
  --midnight: #05070c;
  --muted: #556174;
  --muted-strong: #3c4656;
  --accent: #0f3d7a;
  --accent-strong: #0a2e5d;
  --accent-soft: #e0e9f6;
  --border: rgba(16, 37, 67, 0.14);
  --shadow: 0 24px 60px rgba(5, 7, 12, 0.18);
  --radius: 18px;
  --radius-lg: 28px;
  --radius-sm: 12px;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  line-height: 1.5;
  background: radial-gradient(circle at top, #fdfefe 0%, #f6f9fc 45%, #eef3f9 100%);
}

html {
  scroll-behavior: smooth;
}

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

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

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 3rem 4rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: linear-gradient(120deg, var(--midnight), var(--navy-900));
  color: #eef3ff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
}

.site-header .header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.2rem 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-weight: 600;
}

.brand-mark {
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 0.9rem;
  background: conic-gradient(from 180deg, #10294b, #1f4f9b, #0d1f38, #10294b);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.08);
}

.brand-name {
  font-family: "IBM Plex Serif", "Times New Roman", serif;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
}

.brand-tag {
  display: block;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

#site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

#site-nav a {
  color: rgba(239, 244, 255, 0.85);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease, transform 0.2s ease;
}

#site-nav a:hover {
  color: #ffffff;
  transform: translateY(-1px);
}

.nav-user {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  font-weight: 600;
  cursor: pointer;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.16);
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  align-items: center;
  padding: 4.5rem 0 3rem;
}

.hero-content h1 {
  font-family: "IBM Plex Serif", "Times New Roman", serif;
  font-size: clamp(2.2rem, 3.5vw, 3.4rem);
  margin: 0 0 1rem;
  line-height: 1.1;
}

.hero-content p {
  margin: 0 0 2rem;
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.6;
}

.eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--muted-strong);
  margin-bottom: 1rem;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.3s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #ffffff;
  box-shadow: 0 18px 36px rgba(15, 61, 122, 0.3);
}

.btn-outline {
  background: transparent;
  border-color: rgba(15, 61, 122, 0.4);
  color: var(--accent-strong);
}

.btn:hover {
  transform: translateY(-2px);
}

.panel {
  background: var(--white-strong);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 2.4rem;
  box-shadow: var(--shadow);
  margin-bottom: 2.5rem;
}

#catalog {
  scroll-margin-top: 6.5rem;
}

.panel-dark {
  background: linear-gradient(160deg, var(--navy-900), var(--navy-700));
  color: #f6f8ff;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 30px 60px rgba(5, 7, 12, 0.35);
}

.panel-lite {
  background: var(--accent-soft);
  border-radius: var(--radius);
  padding: 1.5rem;
  border: 1px solid rgba(15, 61, 122, 0.15);
  display: grid;
  gap: 1rem;
}

.section-title {
  margin: 0 0 0.6rem;
  font-family: "IBM Plex Serif", "Times New Roman", serif;
  font-size: 1.6rem;
}

.section-subtitle {
  margin: 0 0 2rem;
  color: var(--muted);
  line-height: 1.5;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.2rem;
}

.stat-card {
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius);
  border: 1px solid rgba(15, 61, 122, 0.1);
  padding: 1.2rem 1.4rem;
  display: grid;
  gap: 0.35rem;
}

.stat-card h3 {
  margin: 0;
  font-size: 1rem;
}

.stat-card strong {
  font-size: 1.5rem;
  color: var(--accent-strong);
  font-family: "IBM Plex Mono", "Courier New", monospace;
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.feature-list li {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  line-height: 1.5;
}

.feature-list li::before {
  content: "◆";
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.7rem;
  margin-top: 0.2rem;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.metric {
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
}

.metric span {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.6);
}

.metric strong {
  font-size: 1.5rem;
  font-family: "IBM Plex Mono", "Courier New", monospace;
}

.filters-form {
  display: grid;
  gap: 1rem;
}

form {
  display: grid;
  gap: 1rem;
}

form label,
.filters-form label {
  display: grid;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.filters-form input,
.filters-form select,
.filters-form textarea,
.order-form input,
.order-form textarea,
.order-form select {
  padding: 0.75rem 0.9rem;
  border-radius: 0.8rem;
  border: 1px solid rgba(15, 61, 122, 0.2);
  background: #ffffff;
  font-size: 0.95rem;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
}

.filters-form input:focus,
.filters-form select:focus,
.filters-form textarea:focus,
.order-form input:focus,
.order-form textarea:focus,
.order-form select:focus {
  outline: none;
  border-color: rgba(15, 61, 122, 0.45);
  box-shadow: 0 0 0 3px rgba(15, 61, 122, 0.12);
}

.filter-actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.catalog-stack {
  display: grid;
  gap: 2rem;
}

.catalog-section {
  display: grid;
  gap: 1rem;
}

.catalog-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.catalog-heading h3 {
  margin: 0;
  font-family: "IBM Plex Serif", "Times New Roman", serif;
}

.catalog-section {
  scroll-margin-top: 6.5rem;
}

.category-jumps {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.category-jumps a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.2rem;
  border-radius: 999px;
  border: 1px solid rgba(15, 61, 122, 0.2);
  color: var(--accent-strong);
  background: #ffffff;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.category-jumps a:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 20px rgba(5, 7, 12, 0.12);
}

.category-jumps a.active {
  background: var(--accent-strong);
  color: #ffffff;
  border-color: transparent;
}

.catalog-heading span {
  color: var(--muted);
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.4rem;
}

.product-card {
  background: #ffffff;
  border-radius: var(--radius);
  border: 1px solid rgba(15, 61, 122, 0.12);
  box-shadow: 0 20px 40px rgba(5, 7, 12, 0.08);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 26px 50px rgba(5, 7, 12, 0.16);
}

.product-media {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: linear-gradient(140deg, #e6edf6, #f5f8fc);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 0.9rem;
}

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

.product-body {
  padding: 1.2rem 1.4rem 1.4rem;
  display: grid;
  gap: 0.6rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-strong);
  background: var(--accent-soft);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
}

.product-title {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.product-summary {
  margin: 0;
  color: var(--muted);
  line-height: 1.4;
  font-size: 0.95rem;
}

.product-meta {
  display: grid;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--muted-strong);
}

.meta-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.empty-state {
  margin-top: 1.5rem;
  color: var(--muted);
  font-weight: 600;
}

.detail-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  align-items: start;
}

.detail-main h1 {
  margin-top: 0;
  font-family: "IBM Plex Serif", "Times New Roman", serif;
  font-size: 2rem;
}

.detail-description {
  color: var(--muted);
  line-height: 1.6;
}

.detail-panel {
  position: sticky;
  top: 6.5rem;
}

.detail-panel .btn {
  width: 100%;
}

.detail-panel .btn + .btn {
  margin-top: 0.8rem;
}

.spec-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}

.spec-item {
  background: #ffffff;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(15, 61, 122, 0.15);
  padding: 0.9rem 1rem;
  display: grid;
  gap: 0.3rem;
}

.spec-item span {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.spec-item strong {
  font-size: 1rem;
  color: var(--ink);
}

.gallery-slider {
  position: relative;
  background: #ffffff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(15, 61, 122, 0.16);
}

.gallery-window {
  overflow: hidden;
}

.gallery-track {
  display: flex;
  transition: transform 0.3s ease;
}

.gallery-slide {
  min-width: 100%;
  margin: 0;
}

.gallery-slide img {
  width: 100%;
  height: auto;
  display: block;
}

.gallery-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(5, 7, 12, 0.6);
  color: #ffffff;
  border: none;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  cursor: pointer;
}

.gallery-nav.prev {
  left: 1rem;
}

.gallery-nav.next {
  right: 1rem;
}

.gallery-nav:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.table-scroll {
  overflow-x: auto;
}

.upload-control {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.orders-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.orders-table th,
.orders-table td {
  text-align: left;
  padding: 0.75rem 0.6rem;
  border-bottom: 1px solid rgba(15, 61, 122, 0.15);
}

.orders-table th {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.link-button {
  background: none;
  border: none;
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
  padding: 0;
}

.chip-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.chip-list li {
  background: rgba(15, 61, 122, 0.1);
  border: 1px solid rgba(15, 61, 122, 0.2);
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.chip-list button {
  border: none;
  background: none;
  color: var(--accent-strong);
  font-weight: 600;
  cursor: pointer;
}

.image-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.image-chip {
  position: relative;
  border-radius: 0.8rem;
  overflow: hidden;
  border: 1px solid rgba(15, 61, 122, 0.2);
}

.image-chip img {
  width: 80px;
  height: 60px;
  object-fit: cover;
}

.image-chip button {
  position: absolute;
  top: 0.2rem;
  right: 0.2rem;
  border: none;
  background: rgba(5, 7, 12, 0.6);
  color: #ffffff;
  border-radius: 50%;
  width: 1.5rem;
  height: 1.5rem;
  cursor: pointer;
}

.order-status {
  margin-top: 1rem;
}

.toast {
  padding: 0.6rem 0.9rem;
  border-radius: 0.8rem;
  background: rgba(15, 61, 122, 0.1);
  color: var(--accent-strong);
  font-weight: 600;
}

.toast.error {
  background: rgba(156, 44, 44, 0.12);
  color: #9c2c2c;
}

.field-hint {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.4;
}

.contact-availability {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.6rem;
}

.contact-availability li {
  padding: 0.5rem 0.7rem;
  border-radius: 0.6rem;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(15, 61, 122, 0.1);
}

footer {
  text-align: center;
  padding: 2rem 1rem 3rem;
  color: var(--muted);
  border-top: 1px solid rgba(15, 61, 122, 0.1);
  margin-top: 3rem;
}

@media (max-width: 900px) {
  main {
    padding: 0 2rem 3rem;
  }

  .site-header .header-inner {
    padding: 1.1rem 2rem;
  }
}

@media (max-width: 600px) {
  body {
    background: #f7f9fc;
  }

  .site-header .header-inner {
    padding: 1rem 1.25rem;
  }

  .brand-mark {
    width: 2.4rem;
    height: 2.4rem;
  }

  .brand-name {
    font-size: 1.1rem;
  }

  .brand-tag {
    font-size: 0.65rem;
    letter-spacing: 0.1em;
  }

  .hero {
    padding: 2.8rem 0 2rem;
    gap: 1.8rem;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-content p {
    font-size: 0.98rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .panel {
    padding: 1.5rem;
  }

  .panel-dark {
    padding: 1.5rem;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .section-subtitle {
    font-size: 0.95rem;
  }

  .category-jumps {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.5rem;
    -webkit-overflow-scrolling: touch;
  }

  .category-jumps a {
    white-space: nowrap;
  }

  .filters-form {
    gap: 0.85rem;
  }

  .filters-form label {
    font-size: 0.85rem;
  }

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

  .product-media {
    aspect-ratio: 16 / 10;
  }

  .product-body {
    padding: 1rem 1.2rem 1.2rem;
  }

  .detail-layout {
    grid-template-columns: 1fr;
  }

  .detail-panel {
    position: static;
  }

  .spec-list {
    grid-template-columns: 1fr;
  }

  .orders-table {
    font-size: 0.85rem;
  }

  footer {
    padding: 1.5rem 1rem 2.5rem;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  #site-nav {
    position: absolute;
    right: 1.25rem;
    top: 4.1rem;
    flex-direction: column;
    align-items: flex-start;
    background: rgba(5, 7, 12, 0.98);
    padding: 1rem 1.4rem;
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    width: min(90vw, 320px);
    display: none;
  }

  body.nav-open #site-nav {
    display: flex;
  }

  .site-header .header-inner {
    position: relative;
  }

  main {
    padding: 0 1.5rem 2.5rem;
  }

  .detail-panel {
    position: static;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }

  .btn,
  .product-card,
  #site-nav a {
    transition: none !important;
  }
}