/**
 * EssentialsC Documentation - Layout System
 * Grid, Sidebar, and Responsive Design
 */

/* Body Layout - Sidebar + Main Content */
body {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
  background-color: var(--bg-primary);
}

/* Sidebar (Fixed) */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: var(--space-6) 0;
  overflow-y: auto;
  z-index: 100;
  scrollbar-width: thin;
  scrollbar-color: var(--border) var(--bg-secondary);
}

/* Sidebar Scrollbar */
.sidebar::-webkit-scrollbar {
  width: 5px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
}

/* Main Content Area */
.main-content {
  grid-column: 2;
  min-height: 100vh;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
}

/* Content Header (Sticky) */
.content-header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(18, 18, 24, 0.85);
  border-bottom: 1px solid var(--border);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-8);
}

/* Light mode header background adjustment */
[data-theme="light"] .content-header {
  background: rgba(255, 255, 255, 0.85);
}

/* Content Wrapper */
.content-wrapper {
  flex: 1;
  max-width: var(--content-max-width);
  width: 100%;
  margin: 0 auto;
  padding: var(--space-10);
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: var(--space-8);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: auto;
}

/* Mobile Menu Toggle (hidden on desktop) */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  padding: var(--space-2);
  cursor: pointer;
}

.mobile-menu-toggle svg {
  width: 24px;
  height: 24px;
}

/* Sidebar Overlay (mobile) */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
  opacity: 0;
  transition: opacity var(--transition);
}

.sidebar-overlay.active {
  opacity: 1;
}

/* Responsive Breakpoints */

/* Tablet: 768px - 1024px */
@media (max-width: 1024px) {
  body {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
    box-shadow: var(--shadow-lg);
  }
  
  .sidebar.active {
    transform: translateX(0);
  }
  
  .main-content {
    grid-column: 1;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .sidebar-overlay {
    display: block;
    pointer-events: none;
  }
  
  .sidebar-overlay.active {
    pointer-events: all;
  }
  
  .content-wrapper {
    padding: var(--space-6);
  }
}

/* Mobile: < 768px */
@media (max-width: 768px) {
  .content-header {
    padding: 0 var(--space-4);
  }
  
  .content-wrapper {
    padding: var(--space-4);
  }
  
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
}

/* Large Desktop: > 1400px */
@media (min-width: 1400px) {
  :root {
    --content-max-width: 1200px;
  }
}

/* Print Styles */
@media print {
  .sidebar,
  .content-header,
  .mobile-menu-toggle {
    display: none;
  }
  
  body {
    grid-template-columns: 1fr;
  }
  
  .main-content {
    grid-column: 1;
  }
  
  .content-wrapper {
    max-width: none;
    padding: 0;
  }
}