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

:root {
  --primary: #007bff;
  --primary-dark: #0056b3;
  --success: #28a745;
  --danger: #dc3545;
  --warning: #ffc107;
  --info: #17a2b8;
  --light: #f8f9fa;
  --dark: #343a40;
  --sidebar-width: 280px;
  --border-radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f5f7fa;
}

.app {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: linear-gradient(180deg, #1e3c72 0%, #2a5298 100%);
  color: white;
  display: flex;
  flex-direction: column;
  box-shadow: 4px 0 10px rgba(0, 0, 0, 0.1);
  position: fixed;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-header {
  padding: 30px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h1 {
  font-size: 24px;
  margin-bottom: 5px;
}

.subtitle {
  font-size: 14px;
  opacity: 0.8;
  font-weight: 300;
}

.nav {
  flex: 1;
  padding: 20px 0;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 15px 20px;
  color: white;
  text-decoration: none;
  transition: all 0.3s;
  border-left: 4px solid transparent;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.1);
  border-left-color: white;
}

.nav-item.active {
  background: rgba(255, 255, 255, 0.15);
  border-left-color: white;
}

.nav-item .icon {
  font-size: 20px;
  margin-right: 12px;
  width: 24px;
}

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.status-indicator {
  display: flex;
  align-items: center;
  margin: 10px 0;
  font-size: 13px;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--warning);
  margin-right: 8px;
  animation: pulse 2s infinite;
}

.status-dot.online {
  background: var(--success);
  animation: none;
}

.status-dot.offline {
  background: var(--danger);
  animation: none;
}

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

/* Main Content */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 40px;
  max-width: 1400px;
}

.page {
  animation: fadeIn 0.3s;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-header {
  margin-bottom: 30px;
}

.page-header h2 {
  font-size: 32px;
  color: var(--dark);
  margin-bottom: 10px;
}

.page-header p {
  color: #6c757d;
  font-size: 16px;
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  margin-left: 10px;
}

.badge-success {
  background: #d4edda;
  color: #155724;
}

.badge-warning {
  background: #fff3cd;
  color: #856404;
}

.badge-info {
  background: #d1ecf1;
  color: #0c5460;
}

/* Cards */
.card {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  padding: 25px;
  margin-bottom: 20px;
}

.card-header {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--dark);
}

/* Form Elements */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--dark);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 15px;
  border: 2px solid #e0e0e0;
  border-radius: var(--border-radius);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.3s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-hint {
  font-size: 13px;
  color: #6c757d;
  margin-top: 5px;
}

/* Buttons */
.btn {
  padding: 12px 24px;
  border: none;
  border-radius: var(--border-radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

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

.btn-danger:hover:not(:disabled) {
  background: #c82333;
}

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

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

/* Messages/Logs */
.messages-container {
  background: #f8f9fa;
  border: 1px solid #dee2e6;
  border-radius: var(--border-radius);
  padding: 15px;
  max-height: 400px;
  overflow-y: auto;
  font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
  font-size: 13px;
}

.message {
  padding: 8px 12px;
  margin: 5px 0;
  border-radius: 4px;
  border-left: 4px solid;
}

.message-sent {
  background: #cfe2ff;
  border-left-color: #0d6efd;
}

.message-received {
  background: #d1e7dd;
  border-left-color: #198754;
}

.message-system {
  background: #e2e3e5;
  border-left-color: #6c757d;
}

.message-error {
  background: #f8d7da;
  border-left-color: #dc3545;
}

.message-streaming {
  background: #fff3cd;
  border-left-color: #ffc107;
}

.message-time {
  color: #6c757d;
  font-size: 11px;
  margin-right: 8px;
}

/* Status Box */
.status-box {
  padding: 15px;
  border-radius: var(--border-radius);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-box.connected {
  background: #d4edda;
  border: 1px solid #c3e6cb;
  color: #155724;
}

.status-box.disconnected {
  background: #f8d7da;
  border: 1px solid #f5c6cb;
  color: #721c24;
}

/* Streaming Box */
.streaming-box {
  background: white;
  border: 2px dashed #ffc107;
  border-radius: var(--border-radius);
  padding: 20px;
  margin: 20px 0;
  min-height: 80px;
  font-size: 15px;
  line-height: 1.8;
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 20px;
}

/* Info Box */
.info-box {
  background: #e7f3ff;
  border-left: 4px solid var(--info);
  padding: 15px;
  border-radius: var(--border-radius);
  margin: 20px 0;
}

.info-box strong {
  color: var(--info);
}

/* Code Block */
.code-block {
  background: #2d2d2d;
  color: #f8f8f2;
  padding: 15px;
  border-radius: var(--border-radius);
  overflow-x: auto;
  font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
  font-size: 13px;
  line-height: 1.5;
}

/* Feature List */
.feature-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 15px;
  margin: 20px 0;
}

.feature-item {
  display: flex;
  align-items: start;
  gap: 10px;
  padding: 15px;
  background: white;
  border-radius: var(--border-radius);
  border: 1px solid #e0e0e0;
}

.feature-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.feature-text h4 {
  font-size: 16px;
  margin-bottom: 5px;
}

.feature-text p {
  font-size: 13px;
  color: #6c757d;
}

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin: 20px 0;
}

.stat-card {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 20px;
  border-radius: var(--border-radius);
  text-align: center;
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 5px;
}

.stat-label {
  font-size: 14px;
  opacity: 0.9;
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
  }

  .main-content {
    margin-left: 0;
    padding: 20px;
  }

  .grid,
  .feature-list,
  .stats {
    grid-template-columns: 1fr;
  }
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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