/* ===== 响应式 ===== */

/* 平板 & 移动端 */
@media (max-width: 1024px) {
  #sidebar {
    width: var(--sidebar-collapsed);
  }
  #sidebar .logo,
  #sidebar .character-list-wrapper h3,
  #sidebar .character-item .info,
  #sidebar .sidebar-btn span {
    display: none;
  }
  .character-item .avatar {
    margin: 0 auto;
  }
  .sidebar-btn i {
    margin: 0 auto;
  }
  #sidebarToggle {
    display: flex !important;
  }
}

@media (max-width: 768px) {
  /* 侧栏移动端样式 */
  #sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    transform: translateX(-100%);
    z-index: 100;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-base);
  }
  #sidebar.open {
    transform: translateX(0);
  }
  #sidebar .logo,
  #sidebar .character-list-wrapper h3,
  #sidebar .character-item .info,
  #sidebar .sidebar-btn span {
    display: block; /* 恢复显示 */
  }

  /* 遮罩层 */
  .sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 99;
    display: none;
    backdrop-filter: blur(2px);
    animation: fadeIn 0.2s ease;
  }
  .sidebar-overlay.show {
    display: block;
  }

  /* ===== 新增：移动端侧栏底部按钮并排显示 ===== */
  .sidebar-footer {
    flex-direction: row !important;
    justify-content: space-around;
    padding: var(--spacing-sm) var(--spacing-md);
    gap: var(--spacing-xs);
    border-top: 1px solid var(--color-border);
  }
  .sidebar-footer .sidebar-btn {
    flex: 1;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-xs);
    gap: var(--spacing-xs);
    font-size: var(--font-size-xs);
    min-height: 56px;
    border-radius: var(--radius-md);
    background: transparent;
    transition: background var(--transition-fast), transform var(--transition-fast);
    color: var(--color-text-secondary);
  }
  .sidebar-footer .sidebar-btn:hover {
    background: var(--color-accent-light);
    color: var(--color-accent);
  }
  .sidebar-footer .sidebar-btn:active {
    transform: scale(0.95);
  }
  .sidebar-footer .sidebar-btn i {
    font-size: 1.4rem;
    width: auto;
    margin: 0;
  }
  .sidebar-footer .sidebar-btn span {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
  }
  .sidebar-footer .sidebar-btn:hover span {
    color: var(--color-accent);
  }

  #mobileMenuToggle {
    display: flex !important;
  }
  #sidebarToggle {
    display: flex !important;
  }

  .header-actions .icon-btn {
    width: 32px;
    height: 32px;
  }
  #chatMessages {
    padding: var(--spacing-md);
  }
  .message {
    max-width: 90%;
  }
  #chatInput {
    padding: var(--spacing-sm);
    gap: var(--spacing-sm);
  }
  .modal-content {
    padding: var(--spacing-lg);
    margin: var(--spacing-sm);
  }
  .setting-row {
    flex-direction: column;
    align-items: stretch;
  }
  .setting-row label {
    min-width: unset;
  }

  /* 角色列表操作按钮在移动端始终显示 */
  .character-item .item-actions {
    opacity: 1;
  }
  .character-item .item-actions .icon-btn {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
  }
}

/* 暗色主题切换按钮（可后续添加） */
.theme-toggle {
  margin-left: auto;
}