/* ==========================================================================
   🤗 Hugging Face LeRobot Physical AI Simulator Styling
   Theme: Dark Slate with Hugging Face Yellow (#FFD21E) & Modern Glassmorphism
   ========================================================================== */

:root {
  --bg-primary: #0b0f17;
  --bg-secondary: #131b26;
  --bg-card: #182232;
  --bg-card-hover: #1f2b3e;
  --border-color: #26354a;
  --border-focus: #ffd21e;
  
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --hf-yellow: #ffd21e;
  --hf-yellow-hover: #f5c400;
  --accent-cyan: #38bdf8;
  --accent-green: #22c55e;
  --accent-red: #ef4444;
  --accent-purple: #a855f7;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* App Container */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Header */
.app-header {
  height: 64px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  gap: 16px;
  z-index: 10;
}

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

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

.hf-emoji {
  font-size: 1.5rem;
}

.logo-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: #fff;
}

.badge {
  background: rgba(255, 210, 30, 0.15);
  color: var(--hf-yellow);
  border: 1px solid rgba(255, 210, 30, 0.3);
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
  margin-left: 4px;
}

.divider {
  color: var(--border-color);
  font-size: 1.2rem;
}

.model-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  background: var(--bg-primary);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  gap: 4px;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
  background: var(--bg-card);
  color: var(--hf-yellow);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.teleop-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  background: rgba(0, 0, 0, 0.3);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.rec-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--text-muted);
  transition: all 0.3s ease;
}

.teleop-indicator.recording {
  border-color: var(--accent-red);
  color: var(--accent-red);
  background: rgba(239, 68, 68, 0.1);
}

.teleop-indicator.recording .rec-dot {
  background-color: var(--accent-red);
  box-shadow: 0 0 10px var(--accent-red);
  animation: pulse 1s infinite alternate;
}

@keyframes pulse {
  from { opacity: 0.4; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1.2); }
}

/* Buttons */
.btn {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.btn-record {
  background-color: var(--bg-card);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-record:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--accent-red);
  color: var(--accent-red);
}

.btn-record.recording-active {
  background-color: var(--accent-red);
  border-color: var(--accent-red);
  color: #fff;
}

.btn-export {
  background-color: var(--hf-yellow);
  color: #0b0f17;
}

.btn-export:hover {
  background-color: var(--hf-yellow-hover);
  box-shadow: 0 0 12px rgba(255, 210, 30, 0.4);
}

.btn-sm {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
}

.btn-sm:hover {
  background: var(--bg-card-hover);
  border-color: var(--hf-yellow);
}

.btn-accent {
  background: var(--hf-yellow);
  color: #000;
  border-color: var(--hf-yellow);
  font-weight: 600;
}

.btn-accent:hover {
  background: var(--hf-yellow-hover);
}

/* Main Workspace & Tabs */
.main-workspace {
  flex: 1;
  padding: 16px 20px;
  overflow-y: auto;
}

.tab-content {
  display: none;
  height: 100%;
}

.tab-content.active {
  display: block;
}

/* Sim Grid Layout */
.sim-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 16px;
  height: calc(100vh - 100px);
}

@media (max-width: 1080px) {
  .sim-grid {
    grid-template-columns: 1fr;
    height: auto;
  }
}

/* Viewport Card (Canvas area) */
.viewport-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.viewport-header {
  padding: 12px 18px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.view-title h3 {
  font-size: 0.95rem;
  font-weight: 600;
}

.chip {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.3);
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 600;
}

.chip-accent {
  background: rgba(255, 210, 30, 0.15);
  color: var(--hf-yellow);
  border-color: rgba(255, 210, 30, 0.3);
}

.camera-controls {
  display: flex;
  gap: 6px;
}

.btn-icon-view {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
}

.btn-icon-view:hover, .btn-icon-view.active {
  color: var(--hf-yellow);
  border-color: var(--hf-yellow);
  background: rgba(255, 210, 30, 0.08);
}

/* Canvas Area */
.canvas-container {
  flex: 1;
  position: relative;
  background: #080c13;
  min-height: 480px;
  overflow: hidden;
}

.canvas-pusht-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
}

#pushtCanvas {
  background: #111827;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: crosshair;
  box-shadow: 0 0 20px rgba(0,0,0,0.5);
}

/* HUD Overlay */
.hud-overlay {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(19, 27, 38, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  pointer-events: none;
}

.hud-label {
  color: var(--text-muted);
}

/* Wrist Cam Picture-in-Picture */
.wrist-pip-container {
  position: absolute;
  bottom: 14px;
  right: 14px;
  background: rgba(19, 27, 38, 0.9);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.pip-header {
  background: var(--bg-card);
  font-size: 0.68rem;
  padding: 3px 8px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
}

/* Viewport Footer */
.viewport-footer {
  padding: 12px 18px;
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

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

.group-title {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Toggle Switch */
.toggle-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  cursor: pointer;
  color: var(--text-primary);
  user-select: none;
}

.toggle-label input {
  display: none;
}

.toggle-slider {
  width: 34px;
  height: 18px;
  background-color: var(--border-color);
  border-radius: 20px;
  position: relative;
  transition: all 0.2s ease;
}

.toggle-slider::before {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  left: 2px;
  top: 2px;
  background-color: #fff;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.toggle-label input:checked + .toggle-slider {
  background-color: var(--accent-green);
}

.toggle-label input:checked + .toggle-slider::before {
  transform: translateX(16px);
}

/* Sidebar */
.sidebar-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  padding: 16px;
  gap: 16px;
  overflow-y: auto;
  box-shadow: var(--shadow-md);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-header h3 {
  font-size: 0.95rem;
  font-weight: 600;
}

.badge-sub {
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--text-secondary);
}

/* Joint Sliders List */
.joint-controls-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.joint-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.joint-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
}

.joint-name {
  color: var(--text-primary);
  font-weight: 500;
}

.joint-val {
  font-family: var(--font-mono);
  color: var(--hf-yellow);
  font-weight: 600;
}

.slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 4px;
  background: var(--border-color);
  outline: none;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--hf-yellow);
  cursor: pointer;
  box-shadow: 0 0 6px rgba(255, 210, 30, 0.6);
  transition: transform 0.1s ease;
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Telemetry & Guide Boxes */
.telemetry-box, .guide-box, .dataset-stats-card, .episodes-list-box, .code-preview-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px;
}

.telemetry-title, .code-title {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 600;
}

.telemetry-code, .code-snippet {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--accent-cyan);
  background: rgba(0, 0, 0, 0.3);
  padding: 8px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

.code-snippet {
  color: #a5f3fc;
}

.guide-box h4, .episodes-list-box h4, .mobile-touch-controller h4 {
  font-size: 0.82rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.mobile-touch-controller {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
}

.mobile-touch-controller h4 {
  color: var(--hf-yellow);
  display: flex;
  align-items: center;
  gap: 6px;
}

.touch-control-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.touch-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.touch-group-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
}

.touch-btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.btn-touch {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 10px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  user-select: none;
  touch-action: manipulation;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.1s, transform 0.1s;
}

.btn-touch:active, .btn-touch.active-touch {
  background: rgba(255, 210, 30, 0.2);
  border-color: var(--hf-yellow);
  color: var(--hf-yellow);
  transform: scale(0.96);
}

.btn-touch-accent {
  background: var(--hf-yellow);
  color: #0b0f17;
  border-color: var(--hf-yellow);
  font-weight: 700;
  padding: 12px 10px;
}

.btn-touch-accent:active, .btn-touch-accent.active-touch {
  background: var(--hf-yellow-hover);
  color: #000;
}

.touch-group.full-width {
  margin-top: 4px;
}

/* Enhanced Mobile Responsiveness */
@media (max-width: 768px) {
  .app-header {
    height: auto;
    padding: 10px 12px;
    flex-wrap: wrap;
    gap: 8px;
  }

  .brand-section {
    width: 100%;
    justify-content: space-between;
  }

  .nav-tabs {
    width: 100%;
    justify-content: center;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

  .main-workspace {
    padding: 8px;
  }

  .sim-grid {
    grid-template-columns: 1fr;
    height: auto;
    gap: 12px;
  }

  .canvas-container {
    min-height: 340px;
    height: 50vh;
  }

  #pushtCanvas {
    width: 100% !important;
    height: auto !important;
    max-width: 360px;
  }

  .viewport-footer {
    padding: 8px 12px;
  }

  .btn-sm {
    padding: 8px 10px;
    font-size: 0.8rem;
  }

  .slider::-webkit-slider-thumb {
    width: 24px;
    height: 24px;
  }
}

.guide-box ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

kbd {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--hf-yellow);
}

/* Push-T Specifics */
.pusht-stats {
  display: flex;
  gap: 12px;
}

.stat-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

.stat-label {
  color: var(--text-muted);
}

.stat-value {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-green);
}

.pusht-mode-select {
  display: flex;
  align-items: center;
  gap: 6px;
}

.control-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.btn-toggle {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.78rem;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.btn-toggle.active {
  background: var(--bg-card-hover);
  color: var(--hf-yellow);
  border-color: var(--hf-yellow);
  font-weight: 600;
}

.pusht-instruction-overlay {
  position: absolute;
  inset: 0;
  background: rgba(11, 15, 23, 0.75);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.3s;
}

.pusht-instruction-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.overlay-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  max-width: 400px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-lg);
}

.overlay-card h4 {
  color: var(--hf-yellow);
  font-size: 1.05rem;
}

.overlay-card p {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* Dataset Statistics */
.dataset-stats-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ds-stat-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.text-success {
  color: var(--accent-green);
}

.text-hf {
  color: var(--hf-yellow);
}

.episodes-scroll {
  max-height: 180px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.ep-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.ep-success {
  color: var(--accent-green);
}

.empty-state {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
  padding: 16px 0;
  line-height: 1.4;
}

/* Modal Exporter */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 600px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.modal-header {
  padding: 16px 20px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.btn-close {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
}

.btn-close:hover {
  color: #fff;
}

.modal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.export-summary {
  background: var(--bg-card);
  padding: 12px;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.82rem;
}

.json-preview-container {
  max-height: 200px;
  overflow-y: auto;
  background: #080c13;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
}

.modal-footer {
  padding: 14px 20px;
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}