:root {
  --bg: #0b1120;
  --surface: #111827;
  --surface-2: #1f2937;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f8fafc;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-2: #818cf8;
  --success: #34d399;
  --radius: 14px;
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Segoe UI", system-ui, sans-serif;
  background: radial-gradient(circle at top, #172554 0%, var(--bg) 45%);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

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

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(11, 17, 32, 0.85);
  border-bottom: 1px solid var(--border);
}

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

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.logo span { color: var(--text); font-weight: 600; }

.nav-links {
  display: flex;
  gap: 1.25rem;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.92rem;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active { color: var(--accent); }

.auth-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.user-greeting {
  color: var(--muted);
  font-size: 0.88rem;
}

.hero {
  padding: 3.5rem 0 2rem;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.hero p {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 560px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
}

.stat-card strong {
  display: block;
  font-size: 1.6rem;
  color: var(--accent);
}

.stat-card span {
  color: var(--muted);
  font-size: 0.82rem;
}

.hero-search {
  margin: 0 0 1.5rem;
}

.search-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 2px);
  padding: 0.5rem 0.5rem 0.5rem 1.15rem;
  box-shadow: var(--shadow);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-bar:focus-within {
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12), var(--shadow);
}

.search-icon {
  flex-shrink: 0;
  color: var(--muted);
}

.search-bar input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  color: var(--text);
  font: inherit;
  font-size: 1.05rem;
  padding: 0.65rem 0;
}

.search-bar input::placeholder {
  color: var(--muted);
}

.search-bar input:focus {
  outline: none;
}

.search-btn {
  flex-shrink: 0;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
}

.toolbar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin: 0 0 1.5rem;
}

.toolbar-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}

.toolbar input,
.toolbar select {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
  font: inherit;
}

.toolbar input:focus,
.toolbar select:focus {
  outline: 2px solid rgba(56, 189, 248, 0.35);
  border-color: var(--accent);
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 2rem 0 1rem;
}

.section-title h2 { font-size: 1.35rem; }

.section-title p {
  color: var(--muted);
  font-size: 0.9rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 1rem;
}

.breadcrumb button {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font: inherit;
}

.breadcrumb button:hover { text-decoration: underline; }

.brands-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 1rem;
}

.brand-card,
.model-card,
.listing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.brand-card:hover,
.model-card:hover,
.listing-card:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.45);
  box-shadow: var(--shadow);
}

.brand-card {
  padding: 1.1rem;
  text-align: center;
}

.brand-logo {
  width: 100%;
  height: 100px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 0.75rem;
}

.brand-card h3 { font-size: 1rem; margin-bottom: 0.25rem; }
.brand-card p { color: var(--muted); font-size: 0.8rem; }

.models-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.model-card { padding: 1rem; }

.model-card .category {
  display: inline-block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.model-card h3 { margin-bottom: 0.35rem; }
.model-card p { color: var(--muted); font-size: 0.85rem; }

.listings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.listing-card { overflow: hidden; }

.listing-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
  background: var(--surface-2);
}

.listing-subtitle {
  color: var(--muted);
  font-size: 0.88rem;
}

.tag-fav {
  color: #f472b6;
  border-color: rgba(244, 114, 182, 0.35);
}

.listing-body { padding: 1rem; }

.listing-body h3 {
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}

.listing-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0;
}

.tag {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
  font-size: 0.75rem;
  color: var(--muted);
}

.price-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.75rem;
}

.price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--success);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  border: none;
  border-radius: 10px;
  padding: 0.65rem 1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, opacity 0.2s;
}

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

.btn-primary {
  background: var(--accent);
  color: #0b1120;
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-sm { padding: 0.45rem 0.75rem; font-size: 0.85rem; }

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--muted);
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 1rem;
}

.modal-overlay.open { display: flex; }

.modal {
  width: min(560px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.modal-lg { width: min(680px, 100%); }

.modal-image {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: 1rem;
}

.modal-subtitle {
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.modal-price {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.modal-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
}

.inquiry-input {
  width: 100%;
  margin-top: 1rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 0.75rem;
  font: inherit;
  resize: vertical;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.auth-tab {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 10px;
  padding: 0.6rem;
  cursor: pointer;
  font: inherit;
}

.auth-tab.active {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.12);
}

.form-field {
  margin-bottom: 0.85rem;
}

.form-field label {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 0.35rem;
}

.form-field input {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 0.7rem 0.85rem;
  font: inherit;
}

.form-error {
  color: #f87171;
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

.demo-hint {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 1.1rem; }

.modal-close {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 1.4rem;
  cursor: pointer;
}

.modal-body { padding: 1.25rem; }

.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 1rem;
}

.detail-item {
  background: var(--surface-2);
  border-radius: 10px;
  padding: 0.75rem;
}

.detail-item span {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  margin-bottom: 0.15rem;
}

.site-footer {
  margin-top: 4rem;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  text-align: center;
  font-size: 0.85rem;
}

.hidden { display: none !important; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .toolbar { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
}

@media (max-width: 560px) {
  .search-bar {
    flex-wrap: wrap;
    padding: 0.75rem;
  }

  .search-bar input {
    width: 100%;
    order: 2;
    padding: 0.5rem 0;
  }

  .search-icon { order: 1; }

  .search-btn {
    order: 3;
    width: 100%;
  }

  .toolbar { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
}