/* =============================================================================
   rpiWebKit Layout System - Clean Header, Toolbar, Split Workspace & Panes
   ČVUT FEL • Úvod do bioinženýrství (UBI)
   ============================================================================= */

.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  background-color: var(--bg-body);
}

/* =============================================================================
   Top Header (Only Logo, App Name, Language Toggle and Dark Mode Toggle)
   ============================================================================= */
.top-header {
  height: 48px;
  background: var(--bg-nav);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  flex-shrink: 0;
  z-index: 100;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  user-select: none;
}

.brand-logo-img {
  width: 30px;
  height: 30px;
  object-fit: contain;
}

.brand-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-title {
  font-weight: 800;
  font-size: 1.12rem;
  color: var(--text-white);
  letter-spacing: -0.2px;
}

.brand-subtitle-tag {
  font-size: 0.70rem;
  font-weight: 700;
  color: #0b1120;
  background: var(--accent-cyan);
  padding: 2px 8px;
  border-radius: 9999px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

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

/* =============================================================================
   Main IDE & Signal Action Toolbar
   ============================================================================= */
.ide-toolbar {
  min-height: 42px;
  background: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  padding: 3px 12px;
  gap: 6px;
  flex-shrink: 0;
  overflow: visible;
}

.ide-toolbar .btn {
  padding: 4px 8px;
  font-size: 0.77rem;
}

.ide-toolbar .form-select {
  padding: 3px 6px;
  font-size: 0.76rem;
}

.ide-toolbar .view-btn {
  padding: 3px 8px;
  font-size: 0.74rem;
}

.examples-toolbar-group {
  margin-left: auto;
  flex-shrink: 1;
  min-width: 0;
}

.templates-select {
  max-width: 175px;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}

@media (max-width: 1360px) {
  .templates-select {
    max-width: 135px;
  }
}

@media (max-width: 1180px) {
  .examples-toolbar-group {
    margin-left: 0;
  }
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.toolbar-separator {
  width: 1px;
  height: 22px;
  background: var(--border-color);
  margin: 0 4px;
  flex-shrink: 0;
}

/* View Switcher Segmented Control */
.view-switcher {
  display: flex;
  align-items: center;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 2px;
  gap: 2px;
}

.view-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.76rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
}

.view-btn:hover {
  color: var(--text-white);
}

.view-btn.active {
  background: var(--accent-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

/* Status Pill */
.device-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--font-code);
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--status-disconnected);
  box-shadow: 0 0 6px rgba(244, 63, 94, 0.6);
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.status-dot.connected {
  background: var(--status-connected);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.8);
}

.status-dot.busy {
  background: var(--status-busy);
  box-shadow: 0 0 8px rgba(245, 158, 11, 0.8);
  animation: pulseDot 1s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.9); }
}

/* =============================================================================
   Main Workspace: Sidebars, Center (Editor & REPL) and Right (Signal Plotter)
   ============================================================================= */
.ide-workspace {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  position: relative;
}

/* Unified Left Sidebar Pane (Stacked PC & Pico Explorer) */
.sidebar-pane, .explorer-pane {
  display: flex;
  flex-direction: column;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  width: 260px;
  min-width: 180px;
  max-width: 460px;
  overflow: hidden;
  position: relative;
  transition: width 0.15s ease;
  user-select: none;
  flex-shrink: 0;
  height: 100%;
}

.sidebar-pane.collapsed, .explorer-pane.collapsed {
  width: 0 !important;
  min-width: 0 !important;
  border: none !important;
  overflow: hidden;
}

/* Vertically Stacked Explorer Sections */
.explorer-stack-section {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  min-height: 80px;
}

#pcSection {
  flex: 1;
  min-height: 90px;
}

#picoSection {
  flex: 1;
  min-height: 90px;
  border-top: 1px solid var(--border-color);
}

/* Vertical Stack Resizer between PC and Pico */
.stack-resizer-v {
  height: 5px;
  cursor: row-resize;
  background: var(--bg-body);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.15s ease;
  z-index: 10;
  flex-shrink: 0;
}

.stack-resizer-v:hover, .stack-resizer-v.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.pane-header {
  height: 36px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-white);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.pane-header-title {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pane-header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.pane-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 6px;
  position: relative;
}

/* Resizers */
.gutter-resizer {
  width: 4px;
  cursor: col-resize;
  background: transparent;
  transition: background-color 0.15s ease;
  z-index: 10;
  flex-shrink: 0;
}

.gutter-resizer:hover, .gutter-resizer.active {
  background: var(--accent-primary);
}

.gutter-resizer-v {
  height: 4px;
  cursor: row-resize;
  background: transparent;
  transition: background-color 0.15s ease;
  z-index: 10;
  flex-shrink: 0;
}

.gutter-resizer-v:hover, .gutter-resizer-v.active {
  background: var(--accent-primary);
}

/* =============================================================================
   Center Pane: Editor + REPL
   ============================================================================= */
.center-pane {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 300px;
  overflow: hidden;
  background: var(--bg-body);
}

.editor-section {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 120px;
  overflow: hidden;
}

.editor-tabs-bar {
  height: 36px;
  background: var(--bg-nav);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 6px;
  overflow-x: auto;
  flex-shrink: 0;
}

.tabs-list {
  display: flex;
  align-items: center;
  gap: 2px;
  overflow-x: auto;
  height: 100%;
}

.editor-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 30px;
  padding: 0 10px;
  background: var(--bg-sidebar);
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-family: var(--font-code);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-fast);
}

.editor-tab:hover {
  color: var(--text-white);
  background: var(--bg-card);
}

.editor-tab.active {
  color: var(--text-white);
  background: var(--bg-body);
  border-color: var(--border-color);
  border-top: 2px solid var(--accent-cyan);
  font-weight: 600;
}

.editor-tab.active.tab-source-pico {
  border-top: 2px solid var(--accent-rose);
}

.editor-tab.active.tab-source-pc {
  border-top: 2px solid var(--accent-cyan);
}

.editor-tab.active.tab-source-memory {
  border-top: 2px solid var(--accent-amber);
}

/* Tab Origin Badge (Pico vs PC vs Memory) */
.tab-source-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  padding: 1px 5px;
  border-radius: var(--radius-xs);
  line-height: 1.25;
  user-select: none;
  flex-shrink: 0;
}

.tab-badge-pico {
  background: rgba(244, 63, 94, 0.16);
  color: #fb7185;
  border: 1px solid rgba(244, 63, 94, 0.35);
}

[data-theme="light"] .tab-badge-pico {
  background: rgba(225, 29, 72, 0.10);
  color: #be123c;
  border-color: rgba(225, 29, 72, 0.30);
}

.tab-badge-pc {
  background: rgba(14, 165, 233, 0.16);
  color: #38bdf8;
  border: 1px solid rgba(14, 165, 233, 0.35);
}

[data-theme="light"] .tab-badge-pc {
  background: rgba(2, 132, 199, 0.10);
  color: #0369a1;
  border-color: rgba(2, 132, 199, 0.30);
}

.tab-badge-ram {
  background: rgba(148, 163, 184, 0.14);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

[data-theme="light"] .tab-badge-ram {
  background: rgba(100, 116, 139, 0.10);
  color: #64748b;
  border-color: #cbd5e1;
}

.tab-dirty-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-amber);
  display: none;
}

.editor-tab.is-dirty .tab-dirty-indicator {
  display: inline-block;
}

.tab-close-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 0.85rem;
  cursor: pointer;
  border-radius: 3px;
  padding: 0 2px;
  line-height: 1;
}

.tab-close-btn:hover {
  color: var(--text-white);
  background: var(--accent-rose);
}

.editor-container {
  flex: 1;
  min-height: 0;
  position: relative;
  overflow: hidden;
}

/* Diagnostics Drawer */
.diagnostics-drawer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  max-height: 160px;
  min-height: 28px;
  transition: max-height 0.2s ease;
  overflow: hidden;
}

.diagnostics-drawer.collapsed {
  max-height: 28px;
}

.diagnostics-header {
  height: 28px;
  background: var(--bg-nav);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
}

.diagnostics-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 8px;
  font-family: var(--font-code);
  font-size: 0.76rem;
}

/* Terminal Section */
.terminal-section {
  display: flex;
  flex-direction: column;
  height: 180px;
  min-height: 70px;
  max-height: 500px;
  background: var(--terminal-bg);
  border-top: 1px solid var(--border-color);
  overflow: hidden;
  position: relative;
}

.terminal-header {
  height: 30px;
  background: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text-white);
  flex-shrink: 0;
  user-select: none;
}

.terminal-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.terminal-tools {
  display: flex;
  align-items: center;
  gap: 6px;
}

.terminal-screen {
  flex: 1;
  min-height: 0;
  padding: 8px 12px;
  font-family: var(--font-code);
  font-size: 0.82rem;
  color: var(--terminal-text);
  overflow-y: auto;
  overflow-x: hidden;
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.4;
  cursor: text;
}

.terminal-input-bar {
  height: 32px;
  background: var(--bg-sidebar);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  padding: 0 8px;
  gap: 6px;
  flex-shrink: 0;
}

.terminal-prompt-symbol {
  font-family: var(--font-code);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--terminal-prompt);
}

.terminal-input-field {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-code);
  font-size: 0.82rem;
  color: var(--text-white);
}

/* =============================================================================
   Plotter & FFT Section (from UBIserial)
   ============================================================================= */
.plotter-section {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 320px;
  background: var(--bg-body);
  border-left: 1px solid var(--border-color);
  overflow: hidden;
}

.plotter-toolbar {
  min-height: 38px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 10px;
  gap: 8px;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.plots-grid {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  gap: 1px;
  background: var(--border-color);
}

.chart-panel {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 100px;
  background: var(--bg-body);
  overflow: hidden;
}

.chart-panel-header {
  height: 26px;
  background: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-white);
  flex-shrink: 0;
}

/* Plot Sub-View Switcher (Both / Signal Only / FFT Only) */
.plot-subview-switcher {
  display: inline-flex;
  align-items: center;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 2px;
  gap: 2px;
}

.plot-subview-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 3px;
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
}

.plot-subview-btn:hover {
  color: var(--text-white);
  background: rgba(255, 255, 255, 0.05);
}

.plot-subview-btn.active {
  background: var(--accent-primary);
  color: var(--text-white);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
}

.btn-panel-toggle {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  cursor: pointer;
  padding: 1px 5px;
  font-size: 0.85rem;
  line-height: 1;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-panel-toggle:hover {
  color: var(--text-white);
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-color);
}

.chart-wrapper {
  flex: 1;
  min-height: 0;
  position: relative;
  width: 100%;
  padding: 4px;
}

/* Bottom Channel Cards Drawer in Plotter */
.channels-drawer {
  background: var(--bg-sidebar);
  border-top: 1px solid var(--border-color);
  padding: 6px 10px;
  max-height: 140px;
  overflow-y: auto;
  flex-shrink: 0;
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 8px;
}

.channel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xs);
  padding: 6px 8px;
  font-size: 0.72rem;
}

.ch-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-left: 4px;
  margin-bottom: 4px;
}

.ch-name-input {
  background: transparent;
  border: none;
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--text-white);
  width: 75px;
  outline: none;
}

.ch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 3px;
}

.ch-color {
  width: 22px;
  height: 18px;
  border: none;
  background: none;
  cursor: pointer;
}

.stats-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  font-family: var(--font-code);
  font-size: 0.68rem;
  color: var(--text-dim);
  gap: 1px 4px;
}

.peak-stat {
  grid-column: span 2;
  color: var(--accent-cyan);
  font-weight: 700;
}

/* Status Bar */
.app-statusbar {
  height: 24px;
  background: var(--bg-nav);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  font-size: 0.70rem;
  color: var(--text-dim);
  user-select: none;
  flex-shrink: 0;
}