/* Layout System */

/* Main Layout Container */
.layout {
  display: flex;
  min-height: 100vh;
  padding-top: var(--topbar-height);
}

/* Header/Topbar */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--topbar-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-6);
  z-index: var(--z-fixed);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.logo {
  display: flex;
  align-items: center;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  color: var(--color-text);
  text-decoration: none;
}

.logo-container {
  position: relative;
  display: flex;
  align-items: center;
  width: 140px;
  height: 32px;
}

.logo img {
  position: absolute;
  top: 0;
  left: 0;
  height: 32px;
  width: auto;
}

/* Light logo (default) */
.logo-light {
  display: block !important;
}

.logo-dark {
  display: none !important;
}

/* Dark mode logo switching */
@media (prefers-color-scheme: dark) {
  .logo-light {
    display: none !important;
  }
  
  .logo-dark {
    display: block !important;
  }
}

/* Force dark logo when data-theme is dark */
[data-theme="dark"] .logo-light {
  display: none !important;
}

[data-theme="dark"] .logo-dark {
  display: block !important;
}

/* Force light logo when data-theme is light */
[data-theme="light"] .logo-light {
  display: block !important;
}

[data-theme="light"] .logo-dark {
  display: none !important;
}

/* Top Navigation */
.topnav {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
}

.nav-link {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text);
  background-color: var(--color-bg-secondary);
  text-decoration: none;
}

.nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

/* Sidebar */
.sidebar {
  width: var(--nav-width);
  height: calc(100vh - var(--topbar-height));
  background: var(--color-panel-bg);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  position: sticky;
  top: var(--topbar-height);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: var(--spacing-6) var(--spacing-6) var(--spacing-4);
  border-bottom: 1px solid var(--color-border-light);
}

/* Main Content Area */
.content {
  flex: 1;
  min-width: 0; /* Prevent flex item from overflowing */
  background: var(--color-bg);
}

.page {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: var(--content-padding);
}

/* Content Sections */
.hero-section {
  text-align: center;
  padding: var(--spacing-12) 0 var(--spacing-16);
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--line-height-relaxed);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--spacing-6);
}

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

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Product Cards Grid */
.product-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-6);
  margin-top: var(--spacing-8);
}

/* Utilities */
.container {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: 0 var(--spacing-6);
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 {
  gap: var(--spacing-2);
}

.gap-3 {
  gap: var(--spacing-3);
}

.gap-4 {
  gap: var(--spacing-4);
}

.gap-6 {
  gap: var(--spacing-6);
}

.w-full {
  width: 100%;
}

.h-full {
  height: 100%;
}

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

/* Mobile-first responsive breakpoints */
@media (max-width: 768px) {
  .layout {
    flex-direction: column;
  }
  
  .topbar {
    padding: 0 var(--spacing-4);
  }
  
  .topnav {
    display: none;
  }
  
  .sidebar {
    position: fixed;
    top: var(--topbar-height);
    left: -100%;
    width: 280px;
    height: calc(100vh - var(--topbar-height));
    z-index: var(--z-modal);
    transition: left var(--transition-base);
    box-shadow: var(--shadow-lg);
  }
  
  .sidebar.open {
    left: 0;
  }
  
  .content {
    width: 100%;
  }
  
  .page {
    padding: var(--spacing-4);
  }
  
  .hero-section {
    padding: var(--spacing-8) 0 var(--spacing-12);
  }
  
  .product-cards {
    grid-template-columns: 1fr;
  }
  
  .mobile-only {
    display: block;
  }
  
  .desktop-only {
    display: none;
  }
}

@media (min-width: 769px) {
  .mobile-only {
    display: none;
  }
  
  .desktop-only {
    display: block;
  }
}

/* Tablet adjustments */
@media (max-width: 1024px) and (min-width: 769px) {
  .sidebar {
    width: 240px;
  }
  
  .product-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Large desktop adjustments */
@media (min-width: 1280px) {
  .topbar {
    padding: 0 var(--spacing-8);
  }
  
  .sidebar {
    width: 300px;
  }
  
  .page {
    padding: var(--spacing-8);
  }
}

/* Print layout */
@media print {
  .topbar,
  .sidebar {
    display: none !important;
  }
  
  .layout {
    display: block;
    padding-top: 0;
  }
  
  .content {
    width: 100% !important;
    max-width: none !important;
  }
  
  .page {
    padding: 0 !important;
  }
}