/* ============================================================
   响应式 - 平板 & 移动端适配
   ============================================================ */

/* ---- 平板（1024px 及以下） ---- */
@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;
  }
  /* 平板端隐藏侧栏汉堡菜单 */
  #sidebarToggle {
    display: none !important;
  }
}

/* ---- 移动端（768px 及以下） ---- */
@media (max-width: 768px) {
  /* ---------- 侧栏 ---------- */
  #sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    transform: translateX(-100%);
    z-index: 100;
    box-shadow: none;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
  }
  #sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
  }
  #sidebar .logo,
  #sidebar .character-list-wrapper h3,
  #sidebar .character-item .info,
  #sidebar .sidebar-btn span {
    display: block;
  }

  /* ---------- 遮罩 ---------- */
  .sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    z-index: 99;
    display: none;
    animation: overlayFadeIn 0.2s ease;
  }
  .sidebar-overlay.show {
    display: block;
  }
  @keyframes overlayFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }

  /* ===== 展开按钮独立容器 ===== */
  .expand-toggle-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: 0.1rem 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 0.05rem;
  }

  .expand-toggle-container .expand-toggle {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    padding: 0.1rem 0.5rem;
    cursor: pointer;
    transition: color 0.15s;
    min-height: 24px;
  }
  .expand-toggle-container .expand-toggle:hover {
    color: var(--color-primary);
  }
  .expand-toggle-container .expand-toggle i {
    font-size: 1rem;
  }

  /* ---------- 移动端侧栏底部按钮 ---------- */
  .sidebar-footer {
    display: flex;
    flex-direction: column !important;
    flex-wrap: nowrap !important;
    padding: 0.2rem 0.2rem;
    gap: 0.1rem;
    border-top: none;
  }

  .sidebar-footer .sidebar-btn-row {
    display: flex;
    flex-direction: row !important;
    flex-wrap: nowrap;
    justify-content: space-around;
    gap: 0.1rem;
    padding: 0.05rem 0;
  }

  .sidebar-footer .sidebar-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    min-width: 0;
    max-width: 56px;
    padding: 0.2rem 0.05rem;
    gap: 0.05rem;
    font-size: 0.5rem;
    min-height: 36px;
    border-radius: var(--radius-md);
    background: transparent;
    transition: background var(--transition-fast), transform var(--transition-fast);
    color: var(--color-text-secondary);
    border: none;
    margin: 0;
  }
  .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: 0.9rem;
    margin: 0;
  }
  .sidebar-footer .sidebar-btn span {
    display: none !important;
  }

  .sidebar-footer .secondary-row {
    animation: expandSlideDown 0.2s ease;
  }
  @keyframes expandSlideDown {
    from {
      opacity: 0;
      transform: translateY(-4px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* ---------- 汉堡菜单 ---------- */
  #mobileMenuToggle {
    display: flex !important;
  }
  #sidebarToggle {
    display: flex !important;
  }

  /* ---------- 头部 ---------- */
  .header-actions .icon-btn {
    width: 32px;
    height: 32px;
  }

  /* ---------- 聊天区域 ---------- */
  #chatMessages {
    padding: var(--spacing-md);
  }
  .message {
    max-width: 90%;
  }
  #chatInput {
    padding: var(--spacing-sm) var(--spacing-md);
    gap: var(--spacing-sm);
  }

  /* ---------- 模态框 ---------- */
  .modal-content {
    padding: var(--spacing-lg);
    margin: var(--spacing-sm);
  }

  /* ---------- 设置面板 ---------- */
  .setting-row {
    flex-direction: column;
    align-items: stretch;
  }
  .setting-row label {
    min-width: unset;
  }

  /* ---------- 角色列表 ---------- */
  .character-item .item-actions {
    opacity: 1;
  }
  .character-item .item-actions .icon-btn {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
  }

  /* ---------- 朋友圈 ---------- */
  .social-post {
    padding: var(--spacing-base);
  }
  .social-inline-comment {
    flex-wrap: wrap;
  }
  .social-inline-comment .social-comment-input {
    flex-basis: 100%;
  }
  .social-inline-comment .social-inline-actions {
    width: 100%;
    justify-content: flex-end;
  }

  /* ---------- 世界书 ---------- */
  .worldbook-header {
    flex-direction: column;
    align-items: stretch;
  }
  .worldbook-actions {
    flex-wrap: wrap;
  }
  .worldbook-actions input[type="text"] {
    min-width: 100px;
    flex: 1;
  }
  .wb-rule-header {
    flex-wrap: wrap;
  }
  .wb-rule-actions {
    flex-wrap: wrap;
  }
  .wb-rule-actions .btn {
    flex: 1 1 auto;
  }

  /* ============================================================
     ★★★ 欢迎页适配 ★★★
     ============================================================ */
  #welcomePage {
    padding: 1.5rem 1rem !important; /* 减小内边距 */
  }
  #welcomePage h1 {
    font-size: 2rem !important; /* 从 3rem 缩小到 2rem */
    margin-bottom: 0.3rem !important;
  }
  #welcomePage p {
    font-size: 1.1rem !important; /* 从 1.5rem 缩小到 1.1rem */
  }
  #welcomePage .sub {
    font-size: 0.9rem !important; /* 从 1rem 缩小到 0.9rem */
    margin-top: 0.5rem !important;
  }
}

/* ---- 小屏手机（480px 及以下） ---- */
@media (max-width: 480px) {
  /* 侧栏按钮进一步缩小 */
  .expand-toggle-container .expand-toggle {
    min-height: 20px;
    font-size: 0.65rem;
  }
  .expand-toggle-container .expand-toggle i {
    font-size: 0.85rem;
  }
  .sidebar-footer .sidebar-btn {
    max-width: 44px;
    min-height: 30px;
    padding: 0.15rem 0.05rem;
  }
  .sidebar-footer .sidebar-btn i {
    font-size: 0.8rem;
  }

  /* 聊天输入区 */
  #chatMessages {
    padding: var(--spacing-sm);
  }
  .message {
    max-width: 95%;
  }
  #chatInput {
    padding: var(--spacing-xs) var(--spacing-sm);
  }
  #messageInput {
    font-size: var(--font-size-sm);
    padding: 0.4rem 0.6rem;
    min-height: 36px;
  }
  .send-btn {
    width: 36px;
    height: 36px;
  }
  .send-btn i {
    font-size: 1rem;
  }

  /* 模态框 */
  .modal-content {
    padding: var(--spacing-base);
    margin: var(--spacing-xs);
  }
  .modal-title {
    font-size: var(--font-size-lg);
  }

  /* 设置面板 */
  .setting-row {
    gap: var(--spacing-sm);
  }
  .setting-row label {
    font-size: var(--font-size-sm);
  }
  .setting-row input,
  .setting-row select {
    font-size: var(--font-size-sm);
    padding: 0.4rem 0.6rem;
  }

  /* 世界书 */
  .wb-rule-card {
    padding: 0.5rem 0.6rem;
  }
  .wb-rule-name {
    font-size: 0.95rem;
  }
  .wb-rule-meta {
    flex-wrap: wrap;
    gap: 0.3rem 0.8rem;
  }

  /* ============================================================
     ★★★ 小屏手机欢迎页进一步适配 ★★★
     ============================================================ */
  #welcomePage h1 {
    font-size: 1.6rem !important; /* 进一步缩小 */
  }
  #welcomePage p {
    font-size: 1rem !important;
  }
  #welcomePage .sub {
    font-size: 0.8rem !important;
  }
}

/* ---- 辅助类 ---- */
.hidden-mobile {
  display: block;
}
@media (max-width: 768px) {
  .hidden-mobile {
    display: none;
  }
}

.hidden-desktop {
  display: none;
}
@media (max-width: 768px) {
  .hidden-desktop {
    display: block;
  }
}

/* ============================================================
   音色选择器移动端优化
   ============================================================ */

@media (max-width: 768px) {
  /* 设置面板中的音色选择器（容器） */
  .tts-voice-controls {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.4rem !important;
  }

  .tts-voice-controls select {
    width: 100% !important;
    max-width: 100% !important;
    min-width: unset !important;
    flex: none !important;
    font-size: 16px !important; /* 防止iOS自动缩放 */
    box-sizing: border-box !important;
    /* 针对移动端下拉框本身，选项文本过长时强制换行（仅部分浏览器支持） */
    white-space: normal !important;
    word-break: break-word !important;
  }

  .tts-voice-controls .btn {
    width: 100% !important;
    justify-content: center;
    margin: 0 !important;
  }

  /* 角色表单中的音色选择器 */
  .tts-voice-select {
    width: 100% !important;
    max-width: 100% !important;
    font-size: 16px !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-break: break-word !important;
  }
}

/* 极小屏设备 (≤480px) 进一步微调 */
@media (max-width: 480px) {
  .tts-voice-controls .btn {
    font-size: 0.85rem;
    padding: 0.4rem 0.8rem;
  }
}