@media screen and (min-width: 768px) {
  .ai-knowledge-workspace {
    position: fixed;
    z-index: 9998;
    inset: 0 0 0 240px;
    overflow: auto;
    background: #f4f6fa;
    color: #1f2940;
  }

  .ai-knowledge-workspace-header {
    position: sticky;
    z-index: 2;
    top: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 24px 32px 20px;
    border-bottom: 1px solid #e4e8f0;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
  }

  .ai-knowledge-workspace-eyebrow {
    margin-bottom: 4px;
    color: #61708c;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.08em;
  }

  .ai-knowledge-workspace-header h1 {
    margin: 0;
    font-size: 24px;
    line-height: 1.25;
  }

  .ai-knowledge-workspace-header p {
    margin: 6px 0 0;
    color: #6d7890;
    font-size: 14px;
  }

  .ai-knowledge-back-button {
    flex: 0 0 auto;
    border: 1px solid #d8deeb;
    border-radius: 10px;
    padding: 10px 15px;
    background: #fff;
    color: #33415f;
    font-size: 14px;
    cursor: pointer;
  }

  .ai-knowledge-back-button:hover {
    border-color: #6a7ff0;
    color: #526be2;
    box-shadow: 0 4px 16px rgba(82, 107, 226, 0.12);
  }

  .ai-knowledge-workspace-content {
    width: min(1180px, calc(100% - 48px));
    margin: 0 auto;
    padding: 12px 0 36px;
  }

  .ai-knowledge-workspace #user-knowledge-hub {
    margin: 16px 0;
  }
}

@media screen and (max-width: 767px) {
  .ai-knowledge-workspace {
    position: fixed;
    z-index: 10002;
    inset: 0;
    overflow: auto;
    background: #f4f6fa;
    color: #1f2940;
  }

  .ai-knowledge-workspace-header {
    position: sticky;
    z-index: 2;
    top: 0;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
    padding: 14px;
    border-bottom: 1px solid #e4e8f0;
    background: rgba(255,255,255,.97);
  }

  .ai-knowledge-workspace-eyebrow { color: #61708c; font-size: 11px; }
  .ai-knowledge-workspace-header h1 { margin: 3px 0; font-size: 19px; }
  .ai-knowledge-workspace-header p { margin: 0; color: #6d7890; font-size: 12px; }
  .ai-knowledge-back-button { flex: 0 0 auto; border: 1px solid #d8deeb; border-radius: 9px; padding: 8px 10px; background: #fff; }
  .ai-knowledge-workspace-content { padding: 10px; }
}

@media screen and (min-width: 1024px) {
  .ai-knowledge-workspace { left: 260px; }
}

@media screen and (min-width: 1440px) {
  .ai-knowledge-workspace { left: 280px; }
}