/* ==========================================================================
   Navigation - Sidebar and header navigation
   ========================================================================== */

/* Sidebar */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  z-index: var(--z-sticky);
  transition: width var(--transition-base);
}

.sidebar-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border-light);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.sidebar-logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-blue), var(--color-purple));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
}

.sidebar-logo-text {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.sidebar-logo-text span {
  color: var(--color-blue);
}

/* Customer Selector */
.customer-selector {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border-light);
}

.customer-selector-button {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-background);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.customer-selector-button:hover {
  background: var(--color-border-light);
}

.customer-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

.customer-info {
  flex: 1;
  min-width: 0;
  text-align: left;
}

.customer-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.customer-meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.customer-selector-icon {
  color: var(--color-text-tertiary);
  flex-shrink: 0;
}

/* Sidebar Navigation */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4) var(--space-3);
}

.nav-section {
  margin-bottom: var(--space-6);
}

.nav-section-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-tertiary);
  padding: 0 var(--space-3);
  margin-bottom: var(--space-2);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: all var(--transition-fast);
  margin-bottom: var(--space-1);
}

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

.nav-item.active {
  background: var(--color-info-bg);
  color: var(--color-blue);
}

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

.nav-item-icon svg {
  width: 100%;
  height: 100%;
}

.nav-item-label {
  flex: 1;
}

.nav-item-badge {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-inverse);
  background: var(--color-red);
  padding: 2px 6px;
  border-radius: var(--radius-full);
  min-width: 20px;
  text-align: center;
}

/* Highlighted nav item for Action Plan */
.nav-item-highlight {
  background: linear-gradient(135deg, rgba(0, 122, 255, 0.1), rgba(175, 82, 222, 0.1));
  border: 1px solid var(--color-blue);
  position: relative;
}

.nav-item-highlight::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--color-blue), var(--color-purple));
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.nav-item-highlight:hover {
  background: linear-gradient(135deg, rgba(0, 122, 255, 0.15), rgba(175, 82, 222, 0.15));
}

.nav-item-highlight.active {
  background: linear-gradient(135deg, rgba(0, 122, 255, 0.2), rgba(175, 82, 222, 0.2));
}

/* Sidebar Footer */
.sidebar-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border-light);
}

/* Page Header */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
}

.page-header-content {
  flex: 1;
}

.page-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-2);
}

.breadcrumb-item {
  color: var(--color-text-secondary);
}

.breadcrumb-item:hover {
  color: var(--color-blue);
}

.breadcrumb-separator {
  color: var(--color-text-tertiary);
}

.breadcrumb-current {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
}

/* Tabs Navigation */
.tabs {
  display: flex;
  gap: var(--space-1);
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: var(--space-6);
}

.tab {
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all var(--transition-fast);
  cursor: pointer;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}

.tab:hover {
  color: var(--color-text-primary);
}

.tab.active {
  color: var(--color-blue);
  border-bottom-color: var(--color-blue);
}

/* Pills Navigation */
.pills {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.pill {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  background: transparent;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
}

.pill:hover {
  background: var(--color-background);
  color: var(--color-text-primary);
}

.pill.active {
  background: var(--color-text-primary);
  color: var(--color-text-inverse);
}

/* Date Range Selector */
.date-range-selector {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.date-range-button {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.date-range-button:hover {
  border-color: var(--color-text-tertiary);
}

.date-range-button svg {
  width: 16px;
  height: 16px;
  color: var(--color-text-secondary);
}

/* Top Header (optional, for multi-tenant) */
.top-header {
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.top-header-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.top-header-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}