:root {
  --bg: #ffffff;
  --muted: #6b7280;
  --accent: #0f766e;
  --card: #f8fafc;
  --max: 1100px;
}
* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
  margin: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    "Noto Sans", sans-serif;
  color: #0f172a;
  background: var(--bg);
}
a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}
.brand img {
  height: 56px;
  display: block;
}
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 0;
}
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
}
nav {
  display: flex;
  gap: 14px;
  align-items: center;
}
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 10px 14px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
}
.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  color: #374151;
  font-size: 22px;
  padding: 6px;
  cursor: pointer;
}

.store-btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
}
.hero {
  background: linear-gradient(90deg, rgba(15, 118, 110, 0.06), transparent);
  padding: 20px;
  border-radius: 12px;
  margin-top: 14px;
}
.hero h1 {
  margin: 0;
  font-size: 22px;
  color: #062b2a;
}
.hero p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.6;
}
.actions {
  margin-top: 14px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 20px;
}
.card {
  background: var(--card);
  padding: 20px;
  border-radius: 10px;
  border: 1px solid #eef2f2;
}
.card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: #08303a;
}
.card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.card li {
  padding: 6px 0;
  border-bottom: 1px dashed #e6eef0;
}
.brand-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.brand-list img {
  height: 36px;
  object-fit: contain;
  border-radius: 6px;
  padding: 6px;
  background: #fff;
  border: 1px solid #e9f0f1;
}
footer {
  border-top: 1px solid #eef2f2;
  margin-top: 28px;
  padding: 18px 0;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}
h2 {
  color: #08303a;
}
p,
li {
  color: var(--muted);
}
@media (max-width: 520px) {
  .hero h1 {
    font-size: 18px;
  }
}
.topbar {
  background: #f8fafc;
  border-bottom: 1px solid #eef2f2;
  padding: 6px 0;
}
.topnav {
  display: flex;
  gap: 18px;
  justify-content: flex-start;
  align-items: center;
  font-size: 14px;
}
.topnav a {
  color: #374151;
  text-decoration: none;
  font-weight: 600;
}
.topnav a:hover {
  color: var(--accent);
}

.has-submenu {
  position: relative;
}
.has-submenu .submenu-toggle {
  background: transparent;
  border: 0;
  color: #374151;
  font-weight: 700;
  cursor: pointer;
  padding: 6px 8px;
}
.has-submenu .submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: #fff;
  border: 1px solid #eef2f2;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(3, 16, 31, 0.06);
  z-index: 1000;
  padding: 8px 0;
}
.has-submenu .submenu a {
  display: block;
  padding: 8px 14px;
  color: #374151;
  font-weight: 600;
  white-space: nowrap;
}
.has-submenu .submenu a:hover {
  background: #f6f9f9;
  color: var(--accent);
}

@media (min-width: 901px) {
  .has-submenu:hover .submenu {
    display: block;
  }
}

.page-box {
  background: var(--bg);
}

.brand-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 12px;
  align-items: center;
  margin-top: 12px;
}
.brand-list a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 14px rgba(3, 16, 31, 0.06);
  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease;
  border: 1px solid rgba(14, 63, 60, 0.04);
}
.brand-list img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  background: transparent;
  border: 0;
  padding: 4px;
}
.brand-list .brand-name {
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 900px) {
  .brand-list {
    grid-template-columns: repeat(auto-fill, minmax(85px, 1fr));
  }
  .brand-list img {
    width: 65px;
    height: 65px;
  }
}
@media (max-width: 520px) {
  .brand-list {
    grid-template-columns: repeat(auto-fill, minmax(75px, 1fr));
  }
  .brand-list a {
    padding: 8px;
  }
  .brand-list img {
    width: 55px;
    height: 55px;
    padding: 2px;
  }
}

.brand-list a:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(3, 16, 31, 0.08);
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex !important;
  }
  .store-btn {
    display: none !important;
  }
  .nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(3, 16, 31, 0.45);
    opacity: 0;
    visibility: hidden;
    transition:
      opacity 0.22s ease,
      visibility 0.22s ease;
    z-index: 998;
  }
  .nav-overlay.active {
    opacity: 1;
    visibility: visible;
  }
  nav.topnav {
    display: flex !important;
    flex-direction: column;
    padding: 20px 16px;
    gap: 12px;
    align-items: flex-start;
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: 320px;
    max-width: 80%;
    background: #fff;
    transform: translateX(100%);
    opacity: 0;
    pointer-events: none;
    transition:
      transform 0.28s ease,
      opacity 0.22s ease;
    z-index: 999;
    overflow: auto;
  }
  nav.topnav.open {
    transform: translateX(0);
    opacity: 1;
    pointer-events: auto;
    box-shadow: -8px 0 30px rgba(3, 16, 31, 0.08);
  }
  nav.topnav a {
    display: block;
    padding: 14px 12px;
    border-radius: 6px;
    color: #374151;
    font-weight: 700;
    white-space: nowrap;
  }
  nav.topnav a:hover {
    background: #f6f9f9;
    color: var(--accent);
  }
  nav.topnav .has-submenu {
    width: 100%;
  }
  nav.topnav .submenu {
    position: static;
    display: none;
    padding: 0;
    background: transparent;
    box-shadow: none;
    border: 0;
  }
  nav.topnav .has-submenu.open .submenu {
    display: block;
  }
  nav.topnav .has-submenu .submenu a {
    padding-left: 22px;
    font-weight: 600;
  }
  .nav-toggle {
    position: relative;
    z-index: 1001;
  }
  body.nav-open {
    overflow: hidden;
  }
}

.models-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

@media (max-width: 900px) {
  .models-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .models-grid {
    grid-template-columns: 1fr;
  }
}
.model-badge {
  background: #fff;
  border: 1px solid #eef2f2;
  border-radius: 8px;
  padding: 14px;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 8px 24px rgba(3, 16, 31, 0.08);
}
.model-badge:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 28px rgba(15, 118, 110, 0.15);
  border-color: rgba(15, 118, 110, 0.3);
}
.model-badge .model-title {
  font-size: 16px;
  margin: 0 0 6px 0;
  color: #08303a;
  font-weight: 700;
}
.model-badge .model-desc {
  font-size: 13px;
  margin: 0;
  color: var(--muted);
  line-height: 1.4;
}