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

.app-header {
  background: #3498db;
  color: white;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.app-header h1 {
  font-size: 1.5rem;
  font-weight: 500;
}

.header-actions {
  display: flex;
  gap: 1rem;
}

.refresh-btn, .add-btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.refresh-btn {
  background: #3498db;
  color: white;
}

.refresh-btn:hover:not(:disabled) {
  background: #2980b9;
}

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

.import-btn {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.import-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

.import-btn:focus {
  outline: none;
}

.add-btn {
  background: #27ae60;
  color: white;
  border: none;
}

.add-btn:hover {
  background: #229954;
}

.add-btn:focus {
  outline: none;
}

.app-main {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
}

.config-path {
  margin-top: 2rem;
  padding: 1rem;
  background: #ecf0f1;
  border-radius: 4px;
  font-size: 0.9rem;
  color: #7f8c8d;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.browse-btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 4px;
  background: #3498db;
  color: white;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
  margin-left: 1rem;
}

.browse-btn:hover {
  background: #2980b9;
}

/* 供应商列表区域 - 相对定位容器 */
.provider-section {
  position: relative;
}

/* 浮动通知 - 绝对定位，不占据空间 */
.notification-floating {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  
  padding: 0.75rem 1.25rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  
  width: fit-content;
  white-space: nowrap;
}

.fade-in {
  animation: fadeIn 0.3s ease-out;
}

.fade-out {
  animation: fadeOut 0.3s ease-out;
}

.notification-success {
  background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(39, 174, 96, 0.3);
}

.notification-error {
  background: linear-gradient(135deg, #e74c3c 0%, #ec7063 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

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

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