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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  color: #333;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Login Page */
.login-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: 20px;
}

.login-box {
  background: white;
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.login-box h1 {
  text-align: center;
  color: #667eea;
  margin-bottom: 10px;
  font-size: 28px;
}

.subtitle {
  text-align: center;
  color: #666;
  margin-bottom: 30px;
  font-size: 14px;
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #444;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px;
  border: 2px solid #e1e8ed;
  border-radius: 6px;
  font-size: 14px;
  transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: #667eea;
}

.form-group small {
  display: block;
  margin-top: 5px;
  color: #666;
  font-size: 12px;
}

/* Buttons */
.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
  display: inline-block;
}

.btn-primary {
  background: #667eea;
  color: white;
}

.btn-primary:hover {
  background: #5568d3;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
  background: #6c757d;
  color: white;
}

.btn-secondary:hover {
  background: #5a6268;
}

.btn-success {
  background: #28a745;
  color: white;
}

.btn-success:hover {
  background: #218838;
}

.btn-danger {
  background: #dc3545;
  color: white;
}

.btn-danger:hover {
  background: #c82333;
}

.btn-block {
  width: 100%;
  display: block;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

/* Error Message */
.error-message {
  background: #f8d7da;
  color: #721c24;
  padding: 12px;
  border-radius: 6px;
  margin-top: 15px;
  border: 1px solid #f5c6cb;
}

/* Dashboard */
.dashboard {
  min-height: 100vh;
  background: #f5f7fa;
}

.header {
  background: white;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 20px 0;
  margin-bottom: 30px;
}

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

.header h1 {
  color: #667eea;
  font-size: 24px;
}

.header-actions {
  display: flex;
  gap: 15px;
  align-items: center;
}

#username-display {
  color: #666;
  font-weight: 600;
}

/* Actions Bar */
.actions-bar {
  display: flex;
  gap: 15px;
  margin-bottom: 30px;
}

/* Sessions Grid */
.sessions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.session-card {
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s, box-shadow 0.3s;
}

.session-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.session-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 15px;
}

.session-title {
  flex: 1;
}

.session-title h3 {
  color: #333;
  margin-bottom: 5px;
}

.session-id {
  color: #666;
  font-size: 12px;
  font-family: monospace;
}

.status-badge {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}

.status-connected {
  background: #d4edda;
  color: #155724;
}

.status-disconnected {
  background: #f8d7da;
  color: #721c24;
}

.status-qr_ready {
  background: #fff3cd;
  color: #856404;
}

.status-initializing {
  background: #d1ecf1;
  color: #0c5460;
}

.session-info {
  margin-bottom: 15px;
}

.info-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid #f0f0f0;
  font-size: 13px;
}

.info-label {
  color: #666;
  font-weight: 600;
}

.info-value {
  color: #333;
  font-family: monospace;
  font-size: 12px;
}

.session-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  animation: fadeIn 0.3s;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background-color: white;
  margin: 5% auto;
  padding: 30px;
  border-radius: 12px;
  max-width: 500px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  animation: slideIn 0.3s;
}

@keyframes slideIn {
  from {
    transform: translateY(-50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.modal-content h2 {
  color: #667eea;
  margin-bottom: 25px;
}

.close {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
  line-height: 1;
  margin-top: -10px;
}

.close:hover,
.close:focus {
  color: #333;
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 25px;
}

.form-actions .btn {
  flex: 1;
}

/* QR Modal */
.qr-container {
  text-align: center;
  padding: 20px;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-container img {
  max-width: 100%;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.qr-instructions {
  text-align: center;
  color: #666;
  font-size: 13px;
  margin-top: 20px;
  padding: 15px;
  background: #f8f9fa;
  border-radius: 6px;
}

/* Loading */
.loading {
  text-align: center;
  color: #666;
  padding: 40px;
}

/* Spinner */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-right: 8px;
  vertical-align: middle;
}

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

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Responsive */
@media (max-width: 768px) {
  .sessions-grid {
    grid-template-columns: 1fr;
  }
  
  .header .container {
    flex-direction: column;
    gap: 15px;
    text-align: center;
  }
  
  .actions-bar {
    flex-direction: column;
  }
  
  .session-actions {
    justify-content: center;
  }
}

/* Utilities */
.text-center {
  text-align: center;
}

.mt-20 {
  margin-top: 20px;
}

.mb-20 {
  margin-bottom: 20px;
}

.truncate {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}