@media (max-width: 768px) {
  :root {
    --km-sidebar-width: 220px;
  }
  body {
    min-width: 320px;
  }
  .sidebar {
    width: var(--km-sidebar-width);
    min-width: 200px;
  }
  .sidebar-toggle-btn {
    top: 16px;
    left: 16px;
    width: 36px;
    height: 36px;
  }
  .header {
    padding: 12px;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .model-selector {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    min-width: 140px;
  }
  .model-selector select {
    min-width: 100px;
    font-size: 12px;
    padding: 6px 10px;
  }
  .welcome-view {
    padding: 20px;
  }
  .search-box-container {
    width: 95%;
    padding: 12px;
    border-radius: 24px;
  }
  .prompt-area {
    gap: 8px;
  }
  .prompt-input {
    font-size: 14px;
  }
  .related-content {
    width: 95%;
    flex-direction: column;
    gap: 12px;
  }
  .content-card {
    max-width: none;
  }
  .chat-container {
    padding: 15px;
    gap: 12px;
  }
  .message-content {
    max-width: 95%;
    min-width: 120px;
    padding: 10px;
    font-size: 14px;
  }
  .input-container {
    padding: 12px;
    gap: 8px;
  }
  .file-upload-btn {
    width: 35px;
    height: 35px;
    font-size: 16px;
  }
  .send-btn {
    padding: 10px 16px;
    font-size: 14px;
  }
  .new-chat-btn {
    width: 100%;
    margin: 8px 0;
    padding: 12px;
    font-size: 14px;
  }
}
@media (max-width: 360px) {
  .input-container {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .message-content {
    max-width: 98%;
    min-width: 100px;
  }
}