/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #64748b;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --info-color: #3b82f6;
  
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --border-color: #e2e8f0;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
}

/* Header */
.header {
  background: var(--bg-card);
  padding: 30px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin-bottom: 30px;
  text-align: center;
}

.header h1 {
  font-size: 2rem;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 20px;
}

.server-status {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.status-badge {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
  display: inline-block;
}

.status-connected {
  background: #d1fae5;
  color: #065f46;
}

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

.status-unknown {
  background: #e5e7eb;
  color: #374151;
}

/* Content Layout */
.content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  margin-bottom: 30px;
}

@media (max-width: 1024px) {
  .content {
    grid-template-columns: 1fr;
  }
}

.column {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Card Component */
.card {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
}

.card h2 {
  font-size: 1.25rem;
  margin-bottom: 20px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Form Styles */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.9375rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
  font-family: 'Monaco', 'Courier New', monospace;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  width: auto;
  cursor: pointer;
}

/* Buttons */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-block;
  text-align: center;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: var(--secondary-color);
  color: white;
}

.btn-secondary:hover {
  background: #475569;
}

.btn-tertiary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-tertiary:hover {
  background: #e2e8f0;
}

.btn-small {
  padding: 6px 12px;
  font-size: 0.875rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.button-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* Topic Preview */
.topic-preview {
  margin: 16px 0;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: 6px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.topic-preview code {
  color: var(--primary-color);
  font-family: 'Monaco', 'Courier New', monospace;
}

/* Devices List */
.devices-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

#devices-count {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.devices-list {
  max-height: 300px;
  overflow-y: auto;
}

.device-item {
  padding: 12px;
  border-radius: 6px;
  background: var(--bg-secondary);
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s;
}

.device-item:hover {
  background: #e2e8f0;
}

.device-info {
  flex: 1;
}

.device-id {
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.875rem;
}

.device-meta {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.device-status {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 8px;
}

.device-status.active {
  background: var(--success-color);
}

.device-status.inactive {
  background: var(--secondary-color);
}

/* Message Monitor */
.monitor-controls {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  align-items: center;
}

.monitor-controls select {
  flex: 1;
  padding: 6px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.875rem;
}

.message-monitor {
  max-height: 400px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 12px;
  background: #fafafa;
}

.monitor-message {
  padding: 12px;
  border-radius: 6px;
  margin-bottom: 8px;
  font-size: 0.875rem;
  border-left: 3px solid;
}

.monitor-message.success {
  background: #d1fae5;
  border-color: var(--success-color);
  color: #065f46;
}

.monitor-message.error {
  background: #fee2e2;
  border-color: var(--danger-color);
  color: #991b1b;
}

.monitor-message.info {
  background: #dbeafe;
  border-color: var(--info-color);
  color: #1e40af;
}

.monitor-message.warning {
  background: #fef3c7;
  border-color: var(--warning-color);
  color: #92400e;
}

.message-time {
  font-weight: 600;
  margin-bottom: 4px;
  font-family: 'Monaco', 'Courier New', monospace;
}

.message-content {
  line-height: 1.5;
}

.message-details {
  margin-top: 8px;
  font-size: 0.75rem;
  opacity: 0.8;
  font-family: 'Monaco', 'Courier New', monospace;
}

/* Loading State */
.loading {
  text-align: center;
  padding: 20px;
  color: var(--text-secondary);
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
}

.toast {
  min-width: 300px;
  padding: 16px;
  border-radius: 8px;
  margin-bottom: 10px;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease-out;
  display: flex;
  align-items: center;
  gap: 12px;
}

.toast.success {
  background: var(--success-color);
  color: white;
}

.toast.error {
  background: var(--danger-color);
  color: white;
}

.toast.info {
  background: var(--info-color);
  color: white;
}

.toast-icon {
  font-size: 1.25rem;
}

.toast-message {
  flex: 1;
  font-size: 0.9375rem;
}

@keyframes slideIn {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(400px);
    opacity: 0;
  }
}

/* Footer */
.footer {
  text-align: center;
  padding: 20px;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-color);
}