:root {
  --bg-main: #0e1117;
  --bg-sidebar: #161b22;
  --bg-card: #1f242d;
  --bg-input: #29303d;
  --border-color: #30363d;
  --text-primary: #f0f6fc;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent-cyan: #00e5a3;
  --accent-yellow: #ffb800;
  --accent-red: #ff4d4f;
  --accent-blue: #388bfd;
  --accent-purple: #a371f7;
  --sidebar-width: 250px;
  --sidebar-collapsed-width: 68px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar Styles */
#sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 100;
  user-select: none;
}

#sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar-header {
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.brand-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--accent-cyan);
  white-space: nowrap;
  overflow: hidden;
}

.brand-icon {
  font-size: 1.3rem;
}

.collapse-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
}
.collapse-btn:hover {
  background: var(--bg-input);
  color: var(--text-primary);
}

.sidebar-menu {
  list-style: none;
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.92rem;
  transition: all 0.15s ease;
  white-space: nowrap;
  overflow: hidden;
}

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

.menu-item.active {
  background-color: #21262d;
  color: var(--accent-cyan);
  border-left: 3px solid var(--accent-cyan);
}

.menu-icon {
  font-size: 1.15rem;
  min-width: 24px;
  text-align: center;
}

.sidebar-footer {
  padding: 14px;
  border-top: 1px solid var(--border-color);
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* App Main Container */
#main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* Page Sub-navigation bar */
.sub-nav-bar {
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 52px;
}

.page-title-group {
  display: flex;
  align-items: center;
  gap: 16px;
}

.page-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.sub-tabs {
  display: flex;
  gap: 6px;
  list-style: none;
}

.sub-tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.86rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.sub-tab-btn:hover {
  background: var(--bg-input);
  color: var(--text-primary);
}

.sub-tab-btn.active {
  background: var(--bg-card);
  color: var(--accent-cyan);
  border-color: var(--border-color);
}

.view-container {
  flex: 1;
  overflow-y: auto;
  padding: 18px;
  display: none;
}

.view-container.active {
  display: block;
}

/* Studio Workbench Layout */
.studio-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 16px;
  margin-bottom: 16px;
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 16px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
}

.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Video Player Container */
.video-wrapper {
  position: relative;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
}

#main-video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

#canvas-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.player-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.btn {
  background-color: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.86rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s;
}

.btn:hover {
  background-color: #353e4f;
  border-color: #48546b;
}

.btn-primary {
  background-color: #1f6feb;
  color: #fff;
  border-color: #388bfd;
}
.btn-primary:hover {
  background-color: #388bfd;
}

.btn-success {
  background-color: #238636;
  color: #fff;
  border-color: #2ea043;
}
.btn-success:hover {
  background-color: #2ea043;
}

.btn-danger {
  background-color: #da3633;
  color: #fff;
  border-color: #f85149;
}

/* Metrics Badges Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}

.metric-box {
  background: var(--bg-input);
  border-radius: 8px;
  padding: 10px;
  border: 1px solid var(--border-color);
}

.metric-label {
  font-size: 0.74rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.metric-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: monospace;
}

.metric-state {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
}
.state-stable { background: rgba(0, 229, 163, 0.15); color: var(--accent-cyan); border: 1px solid var(--accent-cyan); }
.state-moving { background: rgba(255, 184, 0, 0.15); color: var(--accent-yellow); border: 1px solid var(--accent-yellow); }
.state-periodic { background: rgba(163, 113, 247, 0.15); color: var(--accent-purple); border: 1px solid var(--accent-purple); }
.state-high { background: rgba(255, 77, 79, 0.15); color: var(--accent-red); border: 1px solid var(--accent-red); }

/* Trigger List & Timeline */
.trigger-list-container {
  max-height: 230px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: #151921;
}

.trigger-item {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 0.85rem;
  transition: background 0.15s;
}

.trigger-item:hover {
  background: var(--bg-input);
}

.trigger-tag {
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.76rem;
}
.tag-stable { background: #1b4731; color: #3fb950; }
.tag-periodic { background: #3d2966; color: #d2a8ff; }
.tag-spike { background: #5a1e1e; color: #ff7b72; }

/* Charts Container */
.charts-wrapper {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.chart-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 14px;
}

/* Data Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.data-table th, .data-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  background-color: var(--bg-sidebar);
  color: var(--text-secondary);
  font-weight: 600;
}

.data-table tr:hover {
  background-color: var(--bg-input);
}

/* Toast Notification Container */
#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 12px 18px;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 280px;
  max-width: 420px;
  pointer-events: auto;
  animation: slideInRight 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  transition: opacity 0.3s ease;
}

.toast-success { border-left: 4px solid var(--accent-cyan); }
.toast-info { border-left: 4px solid var(--accent-blue); }
.toast-warning { border-left: 4px solid var(--accent-yellow); }
.toast-error { border-left: 4px solid var(--accent-red); }

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Progress Bar & Processing Panel */
.progress-container {
  background: #11151c;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  margin-top: 14px;
}

.progress-track {
  width: 100%;
  height: 12px;
  background: #21262d;
  border-radius: 6px;
  overflow: hidden;
  margin: 10px 0;
  position: relative;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #1f6feb, #00e5a3);
  border-radius: 6px;
  transition: width 0.15s ease;
}

/* Parameter Sliders with Live Values */
.param-card {
  background: #161b22;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.param-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.param-title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.param-badge {
  font-family: monospace;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--accent-cyan);
  background: rgba(0, 229, 163, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid rgba(0, 229, 163, 0.3);
}

.param-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.param-slider {
  width: 100%;
  accent-color: var(--accent-cyan);
  cursor: pointer;
  margin-top: 4px;
}

/* Diff Comparison Table */
.diff-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-top: 12px;
}

.diff-table th, .diff-table td {
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  text-align: left;
}

.diff-table th {
  background: #161b22;
  color: var(--text-secondary);
}

.diff-highlight {
  color: var(--accent-cyan);
  font-weight: 700;
}