/* ==========
   全局基础样式（独立：布局、组件、主题变量，不包含断点覆盖）
   ========== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

/* CSS 变量定义 - 浅色主题（默认） */
:root {
  --color-bg-primary: #f3f4f6; /* gray-100 */
  --color-bg-secondary: #ffffff;
  --color-bg-sidebar: #020617; /* slate-950 */
  --color-bg-header: #111827; /* gray-900 */
  --color-bg-content: #f9fafb; /* gray-50 */
  --color-bg-modal: #020617; /* slate-950 */
  --color-bg-input: #ffffff;
  --color-bg-input-dark: #0b1220;
  --color-text-primary: #111827; /* gray-900 */
  --color-text-secondary: #6b7280; /* gray-500 */
  --color-text-sidebar: #e5e7eb; /* gray-200 */
  --color-text-sidebar-secondary: #9ca3af; /* gray-400 */
  --color-text-modal: #e5e7eb;
  --color-border: #d1d5db; /* gray-300 */
  --color-border-sidebar: rgba(148, 163, 184, 0.5);
  --color-border-modal: rgba(148, 163, 184, 0.6);
  --color-shadow: rgba(15, 23, 42, 0.12);
  --color-shadow-modal: rgba(15, 23, 42, 0.55);
  --color-backdrop: rgba(15, 23, 42, 0.45);
  --color-drawer-shadow: rgba(15, 23, 42, 0.4);
}

/* 深色主题 */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg-primary: #0f172a; /* slate-900 */
    --color-bg-secondary: #1e293b; /* slate-800 */
    --color-bg-sidebar: #020617; /* slate-950 */
    --color-bg-header: #0f172a; /* slate-900 */
    --color-bg-content: #1e293b; /* slate-800 */
    --color-bg-modal: #1e293b; /* slate-800 */
    --color-bg-input: #334155; /* slate-700 */
    --color-bg-input-dark: #0b1220;
    --color-text-primary: #f1f5f9; /* slate-100 */
    --color-text-secondary: #94a3b8; /* slate-400 */
    --color-text-sidebar: #e5e7eb; /* gray-200 */
    --color-text-sidebar-secondary: #9ca3af; /* gray-400 */
    --color-text-modal: #e5e7eb;
    --color-border: #475569; /* slate-600 */
    --color-border-sidebar: rgba(148, 163, 184, 0.5);
    --color-border-modal: rgba(148, 163, 184, 0.6);
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-shadow-modal: rgba(0, 0, 0, 0.7);
    --color-backdrop: rgba(0, 0, 0, 0.65);
    --color-drawer-shadow: rgba(0, 0, 0, 0.5);
  }
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

/* ==========
   应用整体布局
   ========== */

.app-root {
  height: 100vh;          /* 整个应用占满一屏高度，方便侧边栏做“三段式”布局 */
  display: flex;
  flex-direction: column;
}

.app-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  background-color: var(--color-bg-header);
  color: #f9fafb; /* gray-50 */
  box-shadow: 0 1px 2px var(--color-shadow);
  z-index: 10;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.app-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0;
}

/* 桌面端默认隐藏汉堡按钮，移动端在 responsive.css 中显示 */
.sidebar-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  border: 1px solid rgba(249, 250, 251, 0.2);
  background: transparent;
  color: inherit;
}

.sidebar-toggle:focus-visible {
  outline: 2px solid #f97316; /* orange-500 */
  outline-offset: 2px;
}

.app-layout {
  flex: 1;
  display: flex;
  min-height: 0; /* 允许内部子项（侧边栏 + 内容区）在 flex 容器中正确撑满剩余高度 */
}

/* ==========
   侧边栏
   ========== */

.sidebar {
  width: 260px;
  max-width: 100%;
  background-color: var(--color-bg-sidebar);
  color: var(--color-text-sidebar);
  display: flex;
  flex-direction: column;
  padding: 1rem 0.75rem;
  border-right: 1px solid var(--color-border-sidebar);
  height: 100%; /* 填满 app-layout 高度，方便底部登录区固定在底部 */
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0 0.5rem 0.5rem;
  border-bottom: 1px solid rgba(31, 41, 55, 0.9);
  margin-bottom: 0.5rem;
}

.sidebar-title {
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-sidebar-secondary);
  margin: 0;
  transition: color 0.3s ease;
}

.page-list {
  flex: 1;                /* 占据 header 和 footer 之间的所有剩余空间 */
  margin-top: 0.5rem;
  min-height: 0;          /* 允许内部内容在 flex 容器中正确计算高度并滚动 */
  overflow-y: auto;       /* 整个区域（页面列表 + 未来自定义内容）可上下滚动 */
  scrollbar-width: none;  /* Firefox：隐藏滚动条 */
  -ms-overflow-style: none; /* IE/旧 Edge：隐藏滚动条 */
}

.page-list::-webkit-scrollbar {
  width: 0;              /* Chrome/Safari：隐藏滚动条 */
  height: 0;
}

.page-list-items {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-list-items::-webkit-scrollbar {
  width: 6px;
}

.page-list-items::-webkit-scrollbar-thumb {
  background-color: rgba(148, 163, 184, 0.7);
  border-radius: 999px;
}

/* 侧边栏底部登录区域 */
.sidebar-footer {
  margin-top: auto;
  padding: 0.5rem 0.5rem 0;
  border-top: 1px solid rgba(31, 41, 55, 0.9);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--color-text-sidebar-secondary);
  transition: color 0.3s ease;
}

.login-info {
  flex: 1;
  min-width: 0;
}

.login-status-text {
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}

.login-btn {
  padding-inline: 0.8rem;
  background: #2563eb;
  border-color: #1d4ed8;
}

.login-btn:hover {
  background: #1d4ed8;
}

.login-btn[disabled] {
  cursor: not-allowed;
  opacity: 0.6;
}

.page-item {
  display: flex;
  align-items: center;
  padding: 0.45rem 0.55rem;
  margin-bottom: 0.2rem;
  border-radius: 0.375rem;
  font-size: 0.9rem;
  color: #e5e7eb;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
}

.page-select-checkbox {
  width: 1rem;
  height: 1rem;
  margin-right: 0.5rem;
  accent-color: #22c55e;
}

.page-item.is-selected {
  background: rgba(34, 197, 94, 0.18);
}

.page-item:hover {
  background-color: rgba(55, 65, 81, 0.9); /* gray-700 */
  transition: background-color 0.15s ease;
}

@media (prefers-color-scheme: dark) {
  .page-item:hover {
    background-color: rgba(71, 85, 105, 0.5); /* slate-600 */
  }
}

.page-item.is-active {
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: #022c22;
}

.page-item:focus-visible {
  outline: 2px solid #f97316;
  outline-offset: 2px;
}

.page-item-label {
  white-space: nowrap;
  text-overflow: ellipsis;   /* 超出部分显示省略号 */
  overflow: hidden;
  flex: 1;
  min-width: 0;          /* 允许 flex 子项收缩到比内容更小 */
  position: relative;
}

.sidebar-actions {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.btn {
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  line-height: 1.2;
  background-color: var(--color-bg-header);
  color: #e5e7eb;
  transition: background-color 0.15s ease, border-color 0.15s ease,
    box-shadow 0.15s ease, transform 0.05s ease;
}

.btn.icon-btn {
  position: relative;
  width: 2rem;
  height: 2rem;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
}

.btn.icon-btn .btn-icon {
  width: 1.15rem;
  height: 1.15rem;
  display: block;
}

/* 标题右侧工具栏按钮：仅图标、弱化底色，匹配截图风格 */
.sidebar-header .sidebar-actions .btn {
  background: transparent;
  border-color: transparent;
  color: #94a3b8; /* slate-400 */
  box-shadow: none;
}

.sidebar-header .sidebar-actions .btn:hover {
  background: rgba(148, 163, 184, 0.12);
  color: #e5e7eb;
}

.sidebar-header .sidebar-actions .btn.is-active {
  background: rgba(148, 163, 184, 0.14);
  color: #e5e7eb;
}

.sidebar-header .sidebar-actions .btn:active {
  transform: none;
  background: rgba(148, 163, 184, 0.18);
}

.sidebar-header .sidebar-actions .btn:focus-visible {
  outline: 2px solid #f97316;
  outline-offset: 2px;
}

.btn:hover {
  background-color: var(--color-bg-secondary);
}

@media (prefers-color-scheme: dark) {
  .btn:hover {
    background-color: #334155; /* slate-700 */
  }
}

.btn:active {
  transform: translateY(1px);
}

.btn:focus-visible {
  outline: 2px solid #f97316;
  outline-offset: 2px;
}

.action-add {
  background: linear-gradient(135deg, #22c55e, #16a34a);
  border-color: transparent;
  color: #022c22;
}

.action-add:hover {
  background: linear-gradient(135deg, #16a34a, #15803d);
}

.action-add-sub {
  background: linear-gradient(135deg, #4ade80, #22c55e);
  border-color: transparent;
  color: #022c22;
}

.action-add-sub:hover {
  background: linear-gradient(135deg, #22c55e, #16a34a);
}

/* 新增页面下拉：一个「+」展开为「创建一级 / 创建二级」 */
.add-page-dropdown {
  position: relative;
  display: inline-flex;
}

.add-page-dropdown .action-add {
  display: inline-flex;
  align-items: center;
  gap: 0.1rem;
}

.add-page-dropdown-chevron {
  font-size: 0.5rem;
  line-height: 1;
  opacity: 0.9;
}

.add-page-dropdown.is-open .add-page-dropdown-chevron {
  transform: rotate(-180deg);
}

.add-page-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0.25rem;
  min-width: 10rem;
  padding: 0.25rem 0;
  list-style: none;
  background: var(--color-bg-secondary, #1e293b);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 0.5rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  z-index: 100;
  display: none;
}

.add-page-dropdown.is-open .add-page-dropdown-menu {
  display: block;
}

.add-page-dropdown-menu li {
  margin: 0;
}

.add-page-dropdown-item {
  display: block;
  width: 100%;
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
  text-align: left;
  border: none;
  background: transparent;
  color: #e5e7eb;
  cursor: pointer;
  transition: background 0.15s ease;
  border-radius: 0;
}

.add-page-dropdown-item:hover:not(:disabled) {
  background: rgba(148, 163, 184, 0.15);
}

.add-page-dropdown-item:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.action-delete {
  background: #b91c1c;
  border-color: #7f1d1d;
}

.action-delete:hover {
  background: #991b1b;
}

.action-rename {
  background: #0ea5e9;
  border-color: #0284c7;
}

.action-rename:hover {
  background: #0284c7;
}

/* ==========
   内容区
   ========== */

.content {
  flex: 1;
  padding: 1.25rem 1.5rem;
  background-color: var(--color-bg-content);
  overflow-y: auto;
  min-width: 0;
  transition: background-color 0.3s ease;
}

/* 查看/编辑模式切换 */
.content-view,
.content-edit {
  max-width: 960px;
  margin: 0 auto;
}

.content-view.is-hidden,
.content-edit.is-hidden {
  display: none;
}

.content-view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.content-view-title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.content-view-body {
  margin-top: 0.5rem;
  padding: 0.75rem 0;
  font-size: 0.95rem;
  line-height: 1.6;
  word-break: break-word;
  color: var(--color-text-primary);
}

/* 阅读模式：渲染后的正文（标题、加粗、链接等） */
.content-view-body:not(.content-view-body--plain) {
  white-space: normal;
}

.content-view-body h1 { font-size: 1.85rem; font-weight: 700; margin: 1rem 0 0.5rem; line-height: 1.3; }
.content-view-body h2 { font-size: 1.5rem; font-weight: 600; margin: 0.9rem 0 0.45rem; line-height: 1.35; }
.content-view-body h3 { font-size: 1.3rem; font-weight: 600; margin: 0.8rem 0 0.4rem; line-height: 1.4; }
.content-view-body h4 { font-size: 1.15rem; font-weight: 600; margin: 0.7rem 0 0.35rem; }
.content-view-body h5 { font-size: 1.05rem; font-weight: 600; margin: 0.6rem 0 0.3rem; }
.content-view-body h6 { font-size: 0.95rem; font-weight: 600; margin: 0.5rem 0 0.25rem; color: var(--color-text-secondary); }

.content-view-body strong,
.content-view-body b { font-weight: 700; }
.content-view-body em,
.content-view-body i { font-style: italic; }
.content-view-body u { text-decoration: underline; }
.content-view-body del,
.content-view-body s { text-decoration: line-through; }

.content-view-body a {
  color: #2563eb;
  text-decoration: none;
}
.content-view-body a:hover {
  text-decoration: underline;
}
.content-view-body a:focus {
  outline: 2px solid #2563eb;
  outline-offset: 2px;
}

.content-view-body ul,
.content-view-body ol {
  margin: 0.5rem 0;
  padding-left: 1.5rem;
}
.content-view-body li {
  margin: 0.2rem 0;
}
.content-view-body ul ul,
.content-view-body ol ol,
.content-view-body ul ol,
.content-view-body ol ul {
  margin: 0.2rem 0;
}

.content-view-body blockquote {
  margin: 0.5rem 0;
  padding: 0.25rem 0 0.25rem 1rem;
  border-left: 4px solid var(--color-border);
  color: var(--color-text-secondary);
}

.content-view-body pre {
  margin: 0.75rem 0;
  padding: 1rem;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  overflow-x: auto;
  position: relative;
}
.content-view-body pre code {
  font-size: 0.875rem;
  background: none;
  padding: 0;
}
.content-view-body code {
  font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, monospace;
  font-size: 0.9em;
  padding: 0.15em 0.35em;
  background: var(--color-bg-secondary);
  border-radius: 0.25rem;
  border: 1px solid var(--color-border);
}
.content-view-body .content-body-copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 0.25rem;
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  cursor: pointer;
}
.content-view-body .content-body-copy-btn:hover {
  background: var(--color-border);
}

.content-view-body img {
  max-width: 100%;
  height: auto;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
}
.content-view-body video {
  max-width: 100%;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  background: #000;
}

.content-view-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0;
}
.content-view-body th,
.content-view-body td {
  border: 1px solid var(--color-border);
  padding: 0.5rem 0.75rem;
  text-align: left;
}
.content-view-body th {
  font-weight: 600;
  background: var(--color-bg-primary);
}
.content-view-body p {
  margin: 0.5rem 0;
}
.content-view-body p:first-child { margin-top: 0; }
.content-view-body p:last-child { margin-bottom: 0; }

/* 纯文本模式（无 BodyRenderer 时保留原样） */
.content-view-body.content-view-body--plain {
  white-space: pre-wrap;
}

.content-view-body:empty::before {
  content: "（暂无正文）";
  color: var(--color-text-secondary);
}

.page-hero-view {
  margin-bottom: 1rem;
}

.page-hero-view.is-hidden {
  display: none;
}

.page-hero-view .hero-image {
  width: 100%;
  max-width: 960px;
  height: auto;
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
  object-fit: cover;
}

.content-edit-actions {
  margin-top: 1rem;
  margin-bottom: 1rem;
}

/* 非管理员：编辑按钮不显示 */
.btn-edit.is-hidden {
  display: none;
}

.btn-edit,
.btn-save {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.btn-edit:hover,
.btn-save:hover {
  background-color: var(--color-border);
}

.btn-save {
  background-color: #2563eb;
  border-color: #2563eb;
  color: #fff;
}

.btn-save:hover {
  background-color: #1d4ed8;
  border-color: #1d4ed8;
}

.page-meta,
.page-body,
.page-hero {
  max-width: 960px;
  margin: 0 auto 1rem;
}

.page-meta {
  margin-top: 0.25rem;
}

.field-label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color 0.3s ease;
}

.field-input,
.field-textarea {
  width: 100%;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  padding: 0.55rem 0.7rem;
  font-size: 0.95rem;
  background-color: var(--color-bg-input);
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease,
    background-color 0.15s ease, color 0.15s ease;
}

.field-input:focus-visible,
.field-textarea:focus-visible {
  outline: none;
  border-color: #2563eb; /* blue-600 */
  box-shadow: 0 0 0 1px #2563eb33;
}

.field-textarea {
  resize: vertical;
  min-height: 160px;
}

/* ==========
   首页图片（自适应核心样式）
   ========== */

.page-hero {
  margin-top: 0.5rem;
}

.page-hero .hero-image {
  width: 100%;
  max-width: 960px;
  height: auto;
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
  background-color: var(--color-border);
  object-fit: cover;
  box-shadow: 0 10px 25px var(--color-shadow);
  transition: border-color 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
}

/* 首页图片区域整体可隐藏（非首页时） */
.page-hero.is-hidden {
  display: none;
}

/* 当没有图片时可以通过 JS 添加一个辅助类隐藏 */
.hero-image.is-hidden {
  display: none;
}

.page-hero-controls {
  margin-top: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  transition: color 0.3s ease;
}

.hero-config-btn {
  padding: 0.3rem 0.9rem;
  font-size: 0.8rem;
}

.hero-tip {
  margin: 0;
  color: var(--color-text-secondary);
  transition: color 0.3s ease;
}

/* ==========
   侧边栏折叠（桌面端）
   说明：JS 可在 body 上添加/移除 .sidebar-collapsed
   ========== */

body.sidebar-collapsed .sidebar {
  width: 0;
  padding: 0;
  border-right: none;
  overflow: hidden;
}

body.sidebar-collapsed .content {
  padding-left: 1.75rem;
}

/* ==========
   登录模态框
   ========== */

.login-modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: var(--color-backdrop);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
  transition: background-color 0.3s ease;
}

.login-modal-backdrop.is-open {
  display: flex;
}

.login-modal {
  width: 100%;
  max-width: 360px;
  margin: 1.5rem;
  padding: 1.2rem 1.25rem 1rem;
  border-radius: 0.75rem;
  background-color: var(--color-bg-modal);
  color: var(--color-text-modal);
  box-shadow: 0 20px 45px var(--color-shadow-modal);
  border: 1px solid var(--color-border-modal);
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.login-modal-title {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
}

.login-modal-field {
  margin-bottom: 0.75rem;
}

.login-modal .field-label {
  color: var(--color-text-modal);
}

/* 登录弹窗中输入框：深色高对比，避免“白底浅字”不清晰 */
.login-modal .field-input {
  background-color: var(--color-bg-input-dark);
  color: var(--color-text-modal);
  border-color: rgba(148, 163, 184, 0.55);
}

@media (prefers-color-scheme: dark) {
  .login-modal .field-input {
    background-color: var(--color-bg-input);
    border-color: var(--color-border);
  }
}

.login-modal .field-input::placeholder {
  color: rgba(203, 213, 225, 0.65); /* slate-300 */
}

.login-modal .field-input:focus-visible {
  border-color: #60a5fa; /* blue-400 */
  box-shadow: 0 0 0 1px rgba(96, 165, 250, 0.35);
}

.login-modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.login-modal-btn {
  min-width: 4.5rem;
}

.login-modal-btn.cancel {
  background-color: var(--color-bg-header);
  border-color: #4b5563;
  transition: background-color 0.15s ease;
}

.login-modal-btn.cancel:hover {
  background-color: var(--color-bg-secondary);
}

@media (prefers-color-scheme: dark) {
  .login-modal-btn.cancel:hover {
    background-color: #334155; /* slate-700 */
  }
}

.login-modal-btn.primary {
  background-color: #2563eb;
  border-color: #1d4ed8;
}

.login-modal-btn.primary:hover {
  background-color: #1d4ed8;
}

/* ==========
   新增页面模态框（与登录弹窗样式一致）
   ========== */

.add-page-modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: var(--color-backdrop);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
  transition: background-color 0.3s ease;
}

.add-page-modal-backdrop.is-open {
  display: flex;
}

.add-page-modal {
  width: 100%;
  max-width: 360px;
  margin: 1.5rem;
  padding: 1.2rem 1.25rem 1rem;
  border-radius: 0.75rem;
  background-color: var(--color-bg-modal);
  color: var(--color-text-modal);
  box-shadow: 0 20px 45px var(--color-shadow-modal);
  border: 1px solid var(--color-border-modal);
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.add-page-modal-title {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
}

.add-page-modal-field {
  margin-bottom: 0.75rem;
}

.add-page-modal .field-label {
  color: var(--color-text-modal);
}

.add-page-modal .field-input {
  background-color: var(--color-bg-input-dark);
  color: var(--color-text-modal);
  border-color: rgba(148, 163, 184, 0.55);
}

@media (prefers-color-scheme: dark) {
  .add-page-modal .field-input {
    background-color: var(--color-bg-input);
    border-color: var(--color-border);
  }
}

.add-page-modal .field-input::placeholder {
  color: rgba(203, 213, 225, 0.65);
}

.add-page-modal .field-input:focus-visible {
  border-color: #60a5fa;
  box-shadow: 0 0 0 1px rgba(96, 165, 250, 0.35);
}

.add-page-modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.add-page-modal-btn {
  min-width: 4.5rem;
}

.add-page-modal-btn.cancel {
  background-color: var(--color-bg-header);
  border-color: #4b5563;
}

.add-page-modal-btn.cancel:hover {
  background-color: var(--color-bg-secondary);
}

.add-page-modal-btn.primary {
  background-color: #2563eb;
  border-color: #1d4ed8;
}

.add-page-modal-btn.primary:hover {
  background-color: #1d4ed8;
}

/* ==========
   页面列表一级/二级分类标题（归档展示）
   ========== */

.page-category1,
.page-category2 {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.page-category1 {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-text-sidebar-secondary);
  padding: 0.5rem 0.55rem 0.25rem;
  margin-top: 0.5rem;
  border-bottom: 1px solid var(--color-border-sidebar);
  text-transform: uppercase;
}

.page-category1:first-child {
  margin-top: 0;
}

.page-category2 {
  font-size: 0.8rem;
  color: var(--color-text-sidebar-secondary);
  padding: 0.3rem 0.55rem 0.15rem;
  padding-left: 1rem;
}

.page-category-label {
  flex: 1;
  min-width: 0;
}

.page-category-add {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  padding: 0;
  border: 1px solid var(--color-border-sidebar);
  border-radius: 0.25rem;
  background: transparent;
  color: var(--color-text-sidebar-secondary);
  font-size: 0.9rem;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.page-category-add:hover {
  color: var(--color-text-primary, #f3f4f6);
  border-color: currentColor;
  background: rgba(255, 255, 255, 0.08);
}

/* 多选模式下分类行的「删除本组」按钮 */
.page-category-delete-group {
  flex-shrink: 0;
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--color-border-sidebar);
  border-radius: 0.25rem;
  background: transparent;
  color: var(--color-text-sidebar-secondary);
  font-size: 0.7rem;
  line-height: 1.2;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.page-category-delete-group:hover {
  color: #f87171;
  border-color: #f87171;
  background: rgba(248, 113, 113, 0.1);
}

/* 多选模式下分类行的「全选本组」复选框（与 .page-item 的 checkbox 视觉统一） */
.page-category-select-checkbox {
  flex-shrink: 0;
  width: 1rem;
  height: 1rem;
  margin-right: 0.35rem;
  accent-color: #22c55e;
  cursor: pointer;
}

.page-category1 .page-category-select-checkbox,
.page-category2 .page-category-select-checkbox {
  margin-top: 0;
  margin-bottom: 0;
}

/* 新增页面弹窗：一级只读展示与隐藏 */
.is-hidden {
  display: none !important;
}

.add-page-category1-readonly .add-page-category1-readonly-text {
  display: block;
  padding: 0.35rem 0;
  color: var(--color-text-secondary, #9ca3af);
  font-size: 0.9rem;
}

/* 树形列表：一级/二级层次 */
.page-tree-item {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-item-row {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.page-expand-toggle {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--color-text-sidebar-secondary);
  font-size: 0.7rem;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s;
}

.page-expand-toggle:hover {
  color: var(--color-text-sidebar);
}

.page-expand-spacer {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  display: inline-block;
}

.page-list-children {
  list-style: none;
  margin: 0;
  padding: 0;
  padding-left: 1.25rem;
  border-left: 1px solid rgba(148, 163, 184, 0.25);
  margin-left: 0.625rem;
  margin-top: 0.15rem;
  margin-bottom: 0.2rem;
}

.page-item-row.page-item {
  flex: 1;
  min-width: 0;
  padding: 0.45rem 0.55rem;
  margin-bottom: 0.2rem;
  margin-left: 0;
}

.page-item.page-item-level2 {
  padding-left: 0.75rem;
  margin-left: 0.5rem;
  border-left: 2px solid rgba(148, 163, 184, 0.2);
}

/* 兼容旧样式 */
.page-item.page-item-under-category2 {
  margin-left: 0.5rem;
}