/* ========== 左侧导航栏 ========== */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-body);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  overflow: hidden;
  border-right: 1px solid var(--border-light);
  z-index: 100;
}

.sidebar-header {
  padding: 16px;
  padding-top: calc(var(--header-height) + 16px); /* 为固定头部预留空间 */
  flex-shrink: 0;
}

.logo-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.logo-icon {
  color: var(--primary);
  flex-shrink: 0;
}

.logo {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-title);
  line-height: 1.4;
  cursor: pointer;
  transition: color 0.15s;
}

.logo:hover {
  color: var(--primary);
}

.search-box {
  position: relative;
  padding: calc(var(--header-height) + 16px) 12px 12px;
  flex-shrink: 0;
}

.search-box .search-icon {
  position: absolute;
  left: 22px;
  top: calc(var(--header-height) + 16px + 8px);
  color: var(--text-placeholder);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  padding: 7px 12px 7px 36px;
  background-color: var(--bg-container);
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--text-body);
  font-size: 13px;
  outline: none;
  transition: all 0.15s;
}

.search-box input:hover {
  background-color: var(--bg-hover);
}

.search-box input:focus {
  background-color: var(--bg-body);
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-light);
}

.search-box input::placeholder {
  color: var(--text-placeholder);
}

/* 侧边栏操作按钮 */
.sidebar-actions {
  padding: 0 12px 8px;
  flex-shrink: 0;
}

.collapse-all-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 12px;
  background-color: var(--bg-container);
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
}

.collapse-all-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-body);
  border-color: var(--border-light);
}

.collapse-all-btn:active {
  transform: scale(0.98);
}

.collapse-all-btn svg {
  flex-shrink: 0;
  transition: transform 0.2s;
}

/* ========== 网站头部 ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-body);
  border-bottom: 1px solid var(--border-light);
  z-index: 101;
}

.header-content {
  max-width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-title);
}

.header-logo svg {
  color: var(--primary);
}

.site-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-title);
  margin: 0;
  cursor: pointer;
  transition: color 0.15s;
}

.site-title:hover {
  color: var(--primary);
}

.header-divider {
  width: 1px;
  height: 16px;
  background: var(--border-default);
}

.site-description {
  font-size: 13px;
  color: var(--text-placeholder);
  margin: 0;
}

.header-nav {
  display: flex;
  gap: 4px;
  align-items: center;
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.15s;
}

.theme-toggle-btn:hover {
  background: var(--bg-hover);
  color: var(--text-title);
}

.theme-toggle-btn svg {
  width: 14px;
  height: 14px;
}

.header-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
  transition: all 0.15s;
}

.header-nav .nav-link:hover {
  background: var(--bg-hover);
  color: var(--text-title);
}

.header-nav .nav-link svg {
  flex-shrink: 0;
}

/* ========== 网站底部 ========== */
.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--footer-height);
  background: var(--bg-body);
  border-top: 1px solid var(--border-light);
  z-index: 101;
}

.footer-content {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  font-size: 12px;
  color: var(--text-placeholder);
}

.footer-left,
.footer-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-divider {
  color: var(--text-disabled);
}

.footer-content a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

.footer-content a:hover {
  color: var(--primary);
}

.footer-stats {
  display: flex;
  align-items: center;
  gap: 12px;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-placeholder);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.2s;
}

.stat-item:hover {
  color: var(--primary);
}

.stat-item svg {
  flex-shrink: 0;
}

.powered-by a {
  color: var(--primary);
}

/* ========== 中间内容区 ========== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  margin-right: var(--toc-width);
  margin-top: var(--header-height);
  margin-bottom: var(--footer-height);
  min-height: calc(100vh - var(--header-height) - var(--footer-height));
  background-color: var(--bg-container);
}

.view {
  display: none;
  max-width: 820px;
  margin: 0 auto;
  padding: 40px 56px 64px;
  background-color: var(--bg-body);
  min-height: calc(100vh - var(--header-height) - var(--footer-height));
}

.view.active {
  display: block;
}