frontend/src/App.css

/* App Container */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100%;
  overflow: hidden;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* Status Bar */
.status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  z-index: 100;
}

.status-bar.online {
  border-left: 4px solid var(--success-500);
}

.status-bar.offline {
  border-left: 4px solid var(--error-500);
}

.status-bar.checking {
  border-left: 4px solid var(--warning-500);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.status-dot.online {
  background-color: var(--success-500);
}

.status-dot.offline {
  background-color: var(--error-500);
}

.status-dot.checking {
  background-color: var(--warning-500);
}

@keyframes pulse {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.7);
  }
  
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 10px rgba(59, 130, 246, 0);
  }
  
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(59, 130, 246, 0);
  }
}

/* Main Content */
.main-content {
  display: flex;
  gap: 1rem;
  flex: 1;
  padding: 1rem;
  overflow: hidden;
  min-height: 0;
}

@media (max-width: 768px) {
  .main-content {
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.5rem;
  }
}

/* Settings Button */
.settings-button {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 0, 0, 0.1);
  color: var(--gray-900);
  font-weight: 500;
  font-size: 0.875rem;
  transition: all 0.2s ease;
  z-index: 40;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.settings-button:hover {
  background: rgba(255, 255, 255, 1);
  transform: translateY(-1px);
  box-shadow: 0 8px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

@media (max-width: 768px) {
  .settings-button {
    bottom: 1rem;
    right: 1rem;
    padding: 0.75rem;
    border-radius: 50%;
  }
  
  .settings-button span {
    display: none;
  }
}

/* Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 1rem;
}

.modal {
  background: white;
  border-radius: 1rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem;
  border-bottom: 1px solid var(--gray-200);
}

.modal-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
}

.modal-header button {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--gray-500);
  transition: all 0.2s;
}

.modal-header button:hover {
  background: var(--gray-100);
  color: var(--gray-700);
}

.modal-content {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
}

.modal-close-btn {
  padding: 1rem 1.5rem;
  background: var(--gray-50);
  border: none;
  font-weight: 500;
  color: var(--gray-700);
  transition: all 0.2s;
  border-top: 1px solid var(--gray-200);
}

.modal-close-btn:hover {
  background: var(--gray-100);
}

/* About Content */
.about-content {
  text-align: left;
}

.feature-list ul {
  list-style: none;
  padding: 0;
}

.tech-badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  background: var(--gray-100);
  color: var(--gray-700);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 9999px;
  border: 1px solid var(--gray-200);
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .modal {
    margin: 0.5rem;
    max-height: calc(100vh - 1rem);
  }
  
  .modal-header {
    padding: 1rem;
  }
  
  .modal-content {
    padding: 1rem;
  }
  
  .modal-close-btn {
    padding: 0.75rem 1rem;
  }
}

/* Loading states */
.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--gray-200);
  border-top: 3px solid var(--primary-500);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Error and Success Messages */
.message-bar {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  font-weight: 500;
  font-size: 0.875rem;
  z-index: 60;
  animation: slideDown 0.3s ease-out;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.message-bar.error {
  background: var(--error-500);
  color: white;
}

.message-bar.success {
  background: var(--success-500);
  color: white;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(-100%);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* Print styles */
@media print {
  .settings-button,
  .status-bar,
  .modal-overlay {
    display: none !important;
  }
}