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

html, body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  color: #333;
}

/* Modern App */
.modern-app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 2rem 1rem;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
}

.app-title {
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.app-subtitle {
  font-size: 0.95rem;
  color: #666;
  font-weight: 500;
}

/* Main Container */
.app-container {
  flex: 1;
  padding: 2rem 1rem;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.main-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 2rem;
  height: 100%;
}

/* Sidebar */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Main Content */
.main-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  min-height: 600px;
}

/* Card Modern */
.card-modern {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.card-modern:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #333;
}

/* Input Modern */
.input-modern {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  background: #f8f9fa;
}

.input-modern:focus {
  outline: none;
  border-color: #667eea;
  background: white;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.input-modern:disabled {
  background: #e9ecef;
  color: #999;
  cursor: not-allowed;
}

/* Buttons */
.btn-modern {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-block;
  width: 100%;
  margin-top: 0.75rem;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.btn-accept {
  background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
  color: white;
}

.btn-accept:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(17, 153, 142, 0.4);
}

.btn-reject {
  background: linear-gradient(135deg, #eb3349 0%, #f45c43 100%);
  color: white;
}

.btn-reject:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(235, 51, 73, 0.4);
}

.btn-danger {
  background: linear-gradient(135deg, #eb3349 0%, #f45c43 100%);
  color: white;
}

.btn-control {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.btn-control:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.btn-control.btn-danger {
  background: linear-gradient(135deg, #eb3349 0%, #f45c43 100%);
}

/* Users List */
.users-list {
  max-height: 400px;
  overflow-y: auto;
}

.users-list::-webkit-scrollbar {
  width: 6px;
}

.users-list::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 10px;
}

.users-list::-webkit-scrollbar-thumb {
  background: #667eea;
  border-radius: 10px;
}

.user-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem;
  margin-bottom: 0.5rem;
  background: #f8f9fa;
  border-radius: 8px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.user-item:hover {
  background: #e9ecef;
  transform: translateX(4px);
}

.user-name {
  font-weight: 600;
  color: #333;
  flex: 1;
}

.user-btn {
  padding: 0.4rem 0.8rem;
  background: #667eea;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.user-btn:hover {
  background: #764ba2;
  transform: scale(1.05);
}

.empty-state {
  text-align: center;
  color: #999;
  padding: 2rem 1rem;
  font-size: 0.9rem;
}

/* Status Panel */
.status-panel {
  text-align: center;
}

.status-badge {
  display: inline-block;
  padding: 1.5rem 2.5rem;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
  border: 2px solid #667eea;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 600;
  color: #333;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

/* Incoming Call Panel */
.incoming-call-panel {
  background: linear-gradient(135deg, rgba(17, 153, 142, 0.95) 0%, rgba(56, 239, 125, 0.95) 100%);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
  color: white;
  box-shadow: 0 12px 40px rgba(17, 153, 142, 0.3);
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.incoming-header h2 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.incoming-header p {
  font-size: 0.95rem;
  opacity: 0.9;
}

.call-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.call-actions .btn-modern {
  flex: 1;
  margin-top: 0;
  margin: 0;
}

/* Controls Panel */
.controls-panel {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.current-call {
  margin-bottom: 1.5rem;
}

.control-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Form Group */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: #333;
}

/* Responsive */
@media (max-width: 768px) {
  .main-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .sidebar {
    order: 2;
  }

  .main-content {
    order: 1;
  }

  .app-title {
    font-size: 1.8rem;
  }

  .app-subtitle {
    font-size: 0.85rem;
  }

  .control-buttons {
    flex-wrap: wrap;
  }

  .btn-control {
    width: 45px;
    height: 45px;
    font-size: 1.2rem;
  }

  .call-actions {
    flex-direction: column;
  }

  .app-container {
    padding: 1rem;
  }

  .card-modern {
    padding: 1rem;
  }

  .controls-panel {
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .app-title {
    font-size: 1.5rem;
  }

  .app-header {
    padding: 1rem;
  }

  .main-grid {
    gap: 0.75rem;
  }

  .control-buttons {
    gap: 0.5rem;
  }

  .btn-control {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}

/* Icon styling */
.icon {
  display: inline-block;
  font-size: 1.5rem;
}

#micIcon, #volumeIcon {
  display: block;
  font-size: 1.8rem;
}