:root {
  --sidebar-width: 250px;
  --brand: #4f46e5;
  --brand-dark: #3730a3;
}

* { box-sizing: border-box; }

body {
  font-family: "Segoe UI", Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
  background: #f4f6fb;
  color: #1f2937;
}

.app-shell {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: linear-gradient(180deg, var(--brand-dark), #1e1b4b);
  color: #e5e7eb;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; bottom: 0; left: 0;
  z-index: 1030;
  transition: transform 0.25s ease;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  padding: 1.25rem 1.25rem 1rem;
}

.sidebar-nav {
  padding: 0.5rem 0.75rem;
  flex: 1;
}

.sidebar-nav .nav-link {
  color: #cbd5e1;
  border-radius: 0.5rem;
  padding: 0.6rem 0.9rem;
  margin-bottom: 0.15rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.92rem;
  transition: background 0.15s ease, color 0.15s ease;
}

.sidebar-nav .nav-link i { font-size: 1.05rem; width: 1.2rem; text-align: center; }

.sidebar-nav .nav-link:hover { background: rgba(255,255,255,0.08); color: #fff; }
.sidebar-nav .nav-link.active { background: var(--brand); color: #fff; }

.sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: #94a3b8;
}

/* Main area */
.main-area {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 1020;
}

.topbar-title { font-size: 1.25rem; font-weight: 700; margin: 0; flex: 0 0 auto; }
.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 0.6rem; }
.search-box { width: 280px; }

.content { padding: 1.5rem; flex: 1; }

.app-footer {
  padding: 0.85rem 1.5rem;
  font-size: 0.8rem;
  color: #6b7280;
  border-top: 1px solid #e5e7eb;
  background: #fff;
}

/* KPI cards */
.kpi-card .card-body { display: flex; align-items: center; gap: 1rem; }
.kpi-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.kpi-value { font-size: 1.5rem; font-weight: 700; line-height: 1.1; }
.kpi-label { font-size: 0.8rem; color: #6b7280; }

.card { border: none; box-shadow: 0 1px 3px rgba(0,0,0,0.06); border-radius: 0.75rem; }
.card-header { background: #fff; font-weight: 600; border-bottom: 1px solid #eef0f4; }

.badge-status-inuse { background:#dbeafe; color:#1d4ed8; }
.badge-status-instock { background:#dcfce7; color:#15803d; }
.badge-status-maintenance { background:#fef9c3; color:#a16207; }
.badge-status-retired { background:#e5e7eb; color:#4b5563; }
.badge-status-lost { background:#fee2e2; color:#b91c1c; }

/* Asset photos */
.photo-preview {
  width: 64px; height: 64px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}
.photo-placeholder {
  width: 64px; height: 64px;
  border-radius: 8px;
  border: 1px dashed #cbd5e1;
  display: flex; align-items: center; justify-content: center;
  color: #94a3b8;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.asset-thumb {
  width: 40px; height: 40px;
  object-fit: cover;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid #e5e7eb;
}
.asset-thumb-placeholder {
  width: 40px; height: 40px;
  border-radius: 6px;
  background: #f1f5f9;
  color: #94a3b8;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
}

table th { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.03em; color: #6b7280; cursor: pointer; user-select: none; }
table td { font-size: 0.9rem; vertical-align: middle; }

.view { animation: fadeIn 0.2s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px);} to { opacity: 1; transform: translateY(0);} }

@media (max-width: 991.98px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.show { transform: translateX(0); }
  .main-area { margin-left: 0; }
  .search-box { width: 160px; }
}