/* ==========================================================================
   Layout Styles
   Restaurant Backoffice - Minimalist Design
   ========================================================================== */

/* ==========================================================================
   App Shell
   ========================================================================== */

#app {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: var(--header-height) 1fr;
  min-height: 100vh;
  width: 100%;
}

/* ==========================================================================
   Header
   ========================================================================== */

.header {
  grid-area: 1 / 1 / 2 / 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--space-5);
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  z-index: var(--z-30);
}

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

.header-logo {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.header-separator {
  width: 1px;
  height: 24px;
  background-color: var(--color-border);
}

.header-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

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

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

.header-time {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums;
}

.header-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.header-theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-lg);
  border: none;
  background: none;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.header-theme-toggle:hover {
  background-color: var(--color-bg-hover);
  color: var(--color-text-primary);
}

/* ==========================================================================
   Sidebar
   ========================================================================== */

.sidebar {
  grid-area: 2 / 1 / 3 / 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: var(--sidebar-width);
  padding: var(--space-2) 0;
  gap: var(--space-1);
  background-color: var(--color-bg-primary);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar-item {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  background: none;
  font-family: var(--font-sans);
  flex-shrink: 0;
}

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

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

.sidebar-item svg,
.sidebar-item img {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* Sidebar tooltips use JS data-tip system (see app.js) */

.sidebar-separator {
  width: 24px;
  height: 1px;
  margin: var(--space-1) 0;
  background-color: var(--color-border);
  flex-shrink: 0;
}

.sidebar-bottom {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding-top: var(--space-2);
}

.sidebar-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--color-danger);
  border: 2px solid var(--color-bg-primary);
}

/* ==========================================================================
   Main Content
   ========================================================================== */

.main-content {
  grid-area: 2 / 2 / 3 / 3;
  overflow-y: auto;
  padding: var(--space-6);
  background-color: var(--color-bg-secondary);
}

.main-content-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.page-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.page-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.page-date-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

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

/* ==========================================================================
   Panel Grid
   ========================================================================== */

.panel-grid {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: var(--space-6);
  align-items: start;
}

@media (max-width: 1024px) {
  .panel-grid {
    grid-template-columns: 1fr;
  }
}

.panel-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  min-width: 0;
}

/* ==========================================================================
   Stats Row
   ========================================================================== */

.stats-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-4);
}

@media (max-width: 1200px) {
  .stats-row {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .stats-row {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Toolbar
   ========================================================================== */

.toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  flex-wrap: wrap;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.toolbar-separator {
  width: 1px;
  height: 24px;
  background-color: var(--color-border);
  flex-shrink: 0;
}

.toolbar-spacer {
  flex: 1;
}

/* ==========================================================================
   Side Panel
   ========================================================================== */

.side-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: sticky;
  top: var(--space-6);
}

.side-panel-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.side-panel-title {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Connection Status Indicators
   ========================================================================== */

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--color-text-muted);
  flex-shrink: 0;
}

.status-dot.connected {
  background-color: var(--color-success);
}

.status-dot.disconnected {
  background-color: var(--color-danger);
  animation: pulse-dot 2s ease-in-out infinite;
}

.status-dot.warning {
  background-color: var(--color-warning);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  cursor: default;
}

.status-indicator-label {
  font-weight: var(--font-medium);
}

/* Global JS tooltip (appended to body) */
.tip-popup {
  position: fixed;
  z-index: 9999;
  padding: 6px 12px;
  font-family: var(--font-family);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--color-text-inverted);
  background: var(--color-text-primary);
  border-radius: var(--radius-sm);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
  max-width: 260px;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.tip-popup.visible {
  opacity: 1;
}

.header-status-separator {
  width: 1px;
  height: 16px;
  background-color: var(--color-border);
  margin: 0 var(--space-1);
}

/* ==========================================================================
   Quick Stats Widget
   ========================================================================== */

.quick-stats {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-40);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-4);
  min-width: 320px;
}

.quick-stats-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.quick-stats-title {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.quick-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}

.quick-stats-item {
  text-align: center;
}

.quick-stats-value {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  line-height: 1;
}

.quick-stats-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.quick-stats-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  border: none;
  background: none;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.quick-stats-close:hover {
  background-color: var(--color-bg-hover);
  color: var(--color-text-primary);
}

/* ==========================================================================
   Content Sections
   ========================================================================== */

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

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */

@media (max-width: 768px) {
  #app {
    grid-template-columns: 1fr;
    grid-template-rows: var(--header-height) 1fr;
  }

  .header {
    grid-area: 1 / 1 / 2 / 2;
  }

  .sidebar {
    display: none;
  }

  .main-content {
    grid-area: 2 / 1 / 3 / 2;
    padding: var(--space-4);
  }

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

  .quick-stats {
    left: var(--space-4);
    right: var(--space-4);
    bottom: var(--space-4);
    min-width: auto;
  }
}

@media (max-width: 480px) {
  .main-content {
    padding: var(--space-3);
  }

  .header {
    padding: 0 var(--space-3);
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .page-date-nav {
    flex-wrap: wrap;
  }
}