/* ==========================================================================
   HOLYSTOCK - Layout
   ==========================================================================
   App shell layout: sidebar, main content area, and grid system.
   ========================================================================== */

/* --- App Shell --- */
.app {
  display: flex;
  min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: rgba(10, 10, 10, 0.80);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  z-index: var(--z-sticky);
  transition: transform var(--transition-base);
}

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

.sidebar-logo {
  font-family: var(--font-primary);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-accent);
  text-shadow: var(--shadow-glow-sm);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-4) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.sidebar-nav .nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
}

.sidebar-nav .nav-item:hover {
  color: var(--color-text-primary);
  background: var(--color-surface);
}

.sidebar-nav .nav-item.active {
  color: var(--color-accent);
  background: var(--color-accent-dim);
}

.sidebar-nav .nav-item .nav-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.sidebar-footer .avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
}

.sidebar-footer .user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-footer .user-name {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

.sidebar-footer .user-role {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* --- Main Content --- */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: var(--space-8);
  max-width: var(--content-max-width);
}

/* --- Page Header --- */
.page-header {
  margin-bottom: var(--space-8);
}

.page-header .page-title {
  font-size: var(--text-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-2);
}

.page-header .page-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

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

.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); }

/* --- Toolbar --- */
.toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 1;
}

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

/* --- Section --- */
.section {
  margin-bottom: var(--space-8);
}

.section-title {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* --- Mobile Bottom Nav (hidden on desktop) --- */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(10, 10, 10, 0.80);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-top: 1px solid var(--glass-border);
  z-index: var(--z-sticky);
  padding: var(--space-2) 0;
}

.bottom-nav .nav-items {
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.bottom-nav .nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2);
  color: var(--color-text-secondary);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.bottom-nav .nav-item.active {
  color: var(--color-accent);
}

/* --- Mobile Sidebar Overlay --- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: calc(var(--z-sticky) - 1);
}