lerobot/examples/openarms_web_interface/App.css

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: #f5f5f5;
}

main {
  min-height: 100vh;
  padding: 2rem;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

h1 {
  font-size: 2rem;
  font-weight: 600;
  color: #333;
  margin: 0;
}

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #333;
  margin: 0 0 1rem 0;
}

h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: #666;
  margin: 0 0 0.5rem 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.container {
  max-width: 1920px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(500px, 600px) 1fr;
  gap: 2rem;
  align-items: start;
}

/* Left column container */
.left-column {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Right column container */
.right-column {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Responsive: Stack on smaller screens */
@media (max-width: 1200px) {
  .container {
    grid-template-columns: 1fr;
  }
}

.panel {
  background: white;
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.config-panel {
  border: 2px solid #e5e7eb;
}

.config-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
  padding: 0.5rem 0;
}

.config-header:hover {
  opacity: 0.7;
}

.toggle-icon {
  font-size: 1rem;
  color: #6b7280;
  transition: transform 0.2s;
}

.config-content {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid #e5e7eb;
}

.robot-setup {
  margin-bottom: 0.5rem;
}

.robot-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  border-radius: 6px;
  font-weight: 500;
  gap: 1rem;
}

.robot-status.ready {
  background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
  color: #065f46;
  border: 1px solid #10b981;
}

.robot-status.not-ready {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  color: #92400e;
  border: 1px solid #f59e0b;
}

.btn-setup {
  background: #10b981;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-setup:hover:not(:disabled) {
  background: #059669;
}

.btn-setup:disabled {
  background: #d1d5db;
  cursor: not-allowed;
}

.btn-zero {
  background: #8b5cf6;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-zero:hover:not(:disabled) {
  background: #7c3aed;
}

.btn-zero:disabled {
  background: #d1d5db;
  cursor: not-allowed;
}

.zero-position-section {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid #e5e7eb;
}

.btn-zero-large {
  width: 100%;
  background: #8b5cf6;
  color: white;
  border: none;
  padding: 0.875rem 1.5rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 2px 4px rgba(139, 92, 246, 0.2);
}

.btn-zero-large:hover:not(:disabled) {
  background: #7c3aed;
  box-shadow: 0 4px 8px rgba(139, 92, 246, 0.3);
  transform: translateY(-1px);
}

.btn-zero-large:disabled {
  background: #d1d5db;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.delete-episode-section {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid #e5e7eb;
}

.btn-delete {
  width: 100%;
  background: #ef4444;
  color: white;
  border: none;
  padding: 0.875rem 1.5rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 2px 4px rgba(239, 68, 68, 0.2);
}

.btn-delete:hover:not(:disabled) {
  background: #dc2626;
  box-shadow: 0 4px 8px rgba(239, 68, 68, 0.3);
  transform: translateY(-1px);
}

.btn-delete:disabled {
  background: #d1d5db;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.delete-info {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: #666;
  text-align: center;
  font-style: italic;
}

.btn-disconnect {
  background: #ef4444;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-disconnect:hover {
  background: #dc2626;
}

.btn-refresh {
  background: #3b82f6;
  color: white;
  border: none;
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-refresh:hover:not(:disabled) {
  background: #2563eb;
}

.btn-refresh:disabled {
  background: #d1d5db;
  cursor: not-allowed;
}

.control-panel {
  border: 2px solid #10b981;
}

.status-banner {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-radius: 6px;
  margin-bottom: 1.5rem;
  font-weight: 500;
  font-size: 0.95rem;
}

.status-banner.initializing {
  background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
  color: #1e40af;
  border-left: 4px solid #3b82f6;
}

.status-banner.encoding {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  color: #92400e;
  border-left: 4px solid #f59e0b;
}

.status-banner.uploading {
  background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%);
  color: #3730a3;
  border-left: 4px solid #6366f1;
}

.status-banner.success {
  background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
  color: #065f46;
  border-left: 4px solid #10b981;
}

.status-banner.warning {
  background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
  color: #991b1b;
  border-left: 4px solid #ef4444;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 3px solid rgba(0, 0, 0, 0.1);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.control-horizontal {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.control-left {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.control-right {
  display: flex;
  align-items: center;
  justify-content: center;
}

.input-group {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0;
}

input[type="text"] {
  flex: 1;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}

input[type="text"]:disabled {
  background: #f5f5f5;
  cursor: not-allowed;
}

input[type="text"]:focus {
  outline: none;
  border-color: #10b981;
}

button {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-set-task {
  background: #3b82f6;
  color: white;
  min-width: 120px;
}

.btn-set-task:hover:not(:disabled) {
  background: #2563eb;
}

.btn-set-task:disabled {
  background: #d1d5db;
  cursor: not-allowed;
}

.btn-start {
  background: #10b981;
  color: white;
}

.btn-start:hover:not(:disabled) {
  background: #059669;
}

.btn-start:disabled {
  background: #d1d5db;
  cursor: not-allowed;
}

.btn-stop {
  background: #ef4444;
  color: white;
}

.btn-stop:hover {
  background: #dc2626;
}

.btn-reset {
  padding: 0.5rem 1rem;
  background: #6b7280;
  color: white;
  font-size: 0.875rem;
}

.btn-reset:hover {
  background: #4b5563;
}

.status {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}

.status.recording {
  background: #fee2e2;
  color: #991b1b;
}

.status.recording.recording-active {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: #dc2626;
  color: white;
  padding: 1.5rem;
  border: 4px solid #991b1b;
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.4);
  font-weight: 700;
  font-size: 1rem;
}

.status.recording.recording-active .indicator {
  width: 20px;
  height: 20px;
  background: #fef2f2;
  animation: pulse-strong 1s ease-in-out infinite;
}

@keyframes pulse-strong {
  0%, 100% { 
    opacity: 1;
    transform: scale(1);
  }
  50% { 
    opacity: 0.7;
    transform: scale(1.1);
  }
}

.status.recording.recording-active .time-display {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
}

.fps-display {
  font-size: 1rem;
  font-weight: 500;
  opacity: 0.95;
}

.fps-warning {
  color: #fef2f2;
  animation: pulse-warning 1s ease-in-out infinite;
}

@keyframes pulse-warning {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.status.recording.recording-active .btn-stop {
  align-self: stretch;
}

.ramp-up-countdown {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
}

.countdown-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 3rem;
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border: 4px solid #f59e0b;
  border-radius: 16px;
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
  min-width: 280px;
  animation: pulse-warm 1.5s ease-in-out infinite;
}

@keyframes pulse-warm {
  0%, 100% {
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
  }
  50% {
    box-shadow: 0 6px 25px rgba(245, 158, 11, 0.6);
  }
}

.countdown-label {
  font-size: 1rem;
  color: #92400e;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 800;
  margin-bottom: 1rem;
  text-align: center;
}

.countdown-value {
  font-size: 4.5rem;
  font-weight: 900;
  color: #d97706;
  font-family: 'Courier New', monospace;
  line-height: 1;
  text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.15);
  margin-bottom: 0.5rem;
}

.countdown-subtitle {
  font-size: 0.875rem;
  color: #78350f;
  font-weight: 600;
  font-style: italic;
  text-align: center;
  margin-top: 0.5rem;
}

.status.idle {
  background: #f3f4f6;
  color: #374151;
}

.indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ef4444;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.counter {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem;
  background: linear-gradient(135deg, #f9fafb 0%, #f3f4f6 100%);
  border-radius: 8px;
  border: 2px solid #e5e7eb;
  min-width: 200px;
}

.counter-label {
  font-size: 0.75rem;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.counter-value {
  font-size: 3rem;
  font-weight: 700;
  color: #10b981;
  line-height: 1;
}

.time-display {
  font-size: 1.5rem;
  font-weight: 600;
  font-family: 'Courier New', monospace;
}

.error-box {
  padding: 1rem;
  background: #fee2e2;
  color: #991b1b;
  border-radius: 4px;
  border-left: 4px solid #ef4444;
  font-size: 0.875rem;
}

.config-section {
  margin-bottom: 1.5rem;
}

.config-section:last-child {
  margin-bottom: 0;
}

.config-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: #374151;
  font-weight: 500;
}

select {
  padding: 0.5rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 0.875rem;
  background: white;
}

select:disabled {
  background: #f5f5f5;
  cursor: not-allowed;
}

/* Camera Layout */
.camera-layout {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.camera-base {
  width: 100%;
}

.camera-wrist-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.camera-wrist {
  width: 100%;
}

.camera {
  border: 1px solid #e5e7eb;
  border-radius: 4px;
  overflow: hidden;
}

.camera h3 {
  padding: 0.75rem;
  background: #f9fafb;
  border-bottom: 1px solid #e5e7eb;
  margin: 0;
}

.camera img {
  width: 100%;
  height: auto;
  display: block;
  background: #000;
  min-height: 300px;
  object-fit: cover;
}

.camera-placeholder {
  text-align: center;
  padding: 4rem 2rem;
  background: #f9fafb;
  border-radius: 4px;
  border: 2px dashed #d1d5db;
}

.camera-placeholder p {
  margin: 0.5rem 0;
  font-size: 1rem;
  color: #6b7280;
}

.camera-placeholder p:first-child {
  font-size: 1.25rem;
  font-weight: 500;
  color: #374151;
}

.hint {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: #6b7280;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}