/* ==========================================================================
   UBI Data Visualizer Studio - Layout CSS
   ========================================================================== */

.app-wrapper {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* App Header */
.app-header {
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 100;
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15px;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, #0284c7, #10b981);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  box-shadow: 0 2px 8px rgba(2, 132, 199, 0.4);
}

.brand-tag {
  font-size: 10px;
  padding: 2px 6px;
  background: rgba(2, 132, 199, 0.15);
  color: var(--accent-cyan);
  border-radius: 4px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-badge {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-cyan));
  color: white;
  font-weight: 700;
  font-size: 13px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.5px;
}

.brand-title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.2px;
}

.brand-sub {
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 400;
  margin-left: 4px;
}

.header-center {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Main Body Layout */
.app-main {
  display: flex;
  flex: 1;
  height: calc(100vh - var(--header-height));
  position: relative;
  overflow: hidden;
}

/* Left Sidebar Controls */
.sidebar-controls {
  width: 360px;
  min-width: 340px;
  max-width: 480px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  height: 100%;
  flex-shrink: 0;
  z-index: 20;
  transition: transform var(--transition-normal);
}

.sidebar-controls.collapsed {
  transform: translateX(-100%);
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
}

/* Source Box in Sidebar */
.sidebar-source-box {
  padding: 12px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-source-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-source-label {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.sidebar-source-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-tertiary);
  padding: 4px 4px 0;
  gap: 2px;
}

.sidebar-tab-btn {
  flex: 1;
  padding: 8px 4px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 11.5px;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.sidebar-tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.sidebar-tab-btn.active {
  color: var(--text-primary);
  background: var(--bg-secondary);
  border-top: 2px solid var(--accent-primary);
  font-weight: 600;
}

.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sidebar-pane {
  display: none;
  flex-direction: column;
  gap: 16px;
}

.sidebar-pane.active {
  display: flex;
}

/* Stage Area (Canvas + Drawer) */
.stage-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  overflow: hidden;
  background: var(--bg-primary);
}

/* Visualization Canvas */
.viz-canvas-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  padding: 16px;
}

.viz-toolbar {
  height: 44px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  flex-shrink: 0;
}

.viz-toolbar-left, .viz-toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.viz-container {
  flex: 1;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

#chart-plot-area {
  width: 100%;
  height: 100%;
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text-secondary);
  gap: 12px;
  padding: 32px;
}

.empty-state-icon {
  font-size: 48px;
  opacity: 0.6;
}

.empty-state h3 {
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 600;
}

.empty-state p {
  max-width: 420px;
  font-size: 13px;
  line-height: 1.6;
}

/* Collapsible Bottom Data Grid Drawer */
.data-drawer {
  height: var(--drawer-height);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  transition: height var(--transition-normal);
  z-index: 30;
  flex-shrink: 0;
}

.data-drawer.minimized {
  height: 40px;
}

.data-drawer-header {
  height: 40px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  cursor: pointer;
  user-select: none;
}

.data-drawer-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
}

.data-drawer-stats {
  font-size: 12px;
  color: var(--text-muted);
}

.data-drawer-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.data-drawer-body {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}