/* ==========================================================================
   茱萸 ZhuYu Design System — 页面骨架与主导航 (Layout & Navigation)
   Style: Modern Zen & Clean Flat / Dual-State Mini Sidebar / Fluid Desktop
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 应用主容器 (App Container)
   -------------------------------------------------------------------------- */
.app-container {
  display: flex;
  min-height: 100vh;
  width: 100vw;
  overflow-x: hidden;
  position: relative;
  background-color: var(--bg-app);
}

/* --------------------------------------------------------------------------
   2. 沉静雅致双态侧边栏 (Dual-State Sidebar)
   -------------------------------------------------------------------------- */
.sidebar {
  width: 240px;
  background-color: var(--bg-sidebar);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 100;
  border-right: 1px solid var(--sidebar-border);
  transition: width var(--transition-normal), transform var(--transition-normal);
  user-select: none;
  position: relative;
}

/* 折叠态 (Mini 状态：68px) */
.app-container.sidebar-collapsed .sidebar {
  width: 68px;
}

/* 品牌头部 */
.brand-header {
  height: 60px;
  display: flex;
  align-items: center;
  padding: 0 18px;
  gap: 12px;
  border-bottom: 1px solid var(--sidebar-border);
  overflow: hidden;
  white-space: nowrap;
}

.brand-icon {
  width: 32px;
  height: 32px;
  min-width: 32px;
  border-radius: var(--radius-sm);
  background: rgba(197, 155, 39, 0.15);
  border: 1px solid rgba(197, 155, 39, 0.3);
  color: var(--sidebar-active-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: transform var(--transition-fast);
}

.brand-text-group {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: opacity var(--transition-fast);
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.05em;
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 12px;
  color: #7a8691;
  font-family: var(--font-sans);
  letter-spacing: 0.02em;
}

.app-container.sidebar-collapsed .brand-text-group {
  opacity: 0;
  pointer-events: none;
  width: 0;
}

/* 导航菜单列表 */
.nav-list {
  list-style: none;
  padding: 14px 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 42px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--sidebar-text);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-item .icon {
  width: 20px;
  min-width: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  color: #8c97a0;
  transition: color var(--transition-fast);
}

.nav-item span:not(.icon) {
  overflow: hidden;
  text-overflow: ellipsis;
  transition: opacity var(--transition-fast);
}

.nav-item:hover {
  background-color: var(--sidebar-item-hover);
  color: var(--sidebar-text-hover);
}
.nav-item:hover .icon {
  color: #ffffff;
}

/* 选中高亮状态 */
.nav-item.active {
  background-color: var(--sidebar-item-active);
  color: #ffffff;
  font-weight: 600;
}
.nav-item.active .icon {
  color: var(--sidebar-active-gold);
}
.nav-item.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background-color: var(--sidebar-active-gold);
  border-radius: 0 2px 2px 0;
}

/* 折叠态菜单行为 */
.app-container.sidebar-collapsed .nav-item {
  padding: 0;
  justify-content: center;
}
.app-container.sidebar-collapsed .nav-item span:not(.icon) {
  display: none;
}
.app-container.sidebar-collapsed .nav-item.active::before {
  left: 2px;
}

/* 侧栏底部折叠切换与个人信息栏 */
.sidebar-footer {
  padding: 10px;
  border-top: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.btn-sidebar-collapse {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 34px;
  width: 100%;
  border-radius: var(--radius-sm);
  color: #8c97a0;
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: transparent;
  border: 1px solid transparent;
}
.btn-sidebar-collapse:hover {
  background: var(--sidebar-item-hover);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.1);
}
.app-container.sidebar-collapsed .btn-sidebar-collapse span {
  display: none;
}

.user-info-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.user-info-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(197, 155, 39, 0.4);
}

.user-info-card:hover .user-avatar {
  background: rgba(197, 155, 39, 0.35);
}

.user-info-card:hover .user-card-action {
  color: var(--sidebar-active-gold);
}

.user-info-card:active {
  transform: scale(0.98);
}

.user-avatar {
  width: 32px;
  height: 32px;
  min-width: 32px;
  border-radius: var(--radius-pill);
  background: rgba(197, 155, 39, 0.2);
  color: var(--sidebar-active-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  transition: background-color var(--transition-fast);
}

.user-details {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  white-space: nowrap;
  flex: 1;
}

.user-name {
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role {
  font-size: 12px;
  color: #7a8691;
}

.user-card-action {
  color: #7a8691;
  font-size: 13px;
  display: flex;
  align-items: center;
  transition: color var(--transition-fast);
}

.app-container.sidebar-collapsed .user-info-card {
  padding: 6px;
  justify-content: center;
  background: transparent;
  border-color: transparent;
}
.app-container.sidebar-collapsed .user-details,
.app-container.sidebar-collapsed .user-card-action {
  display: none;
}

/* 权限隐藏类 */
.perm-hidden {
  display: none !important;
}

/* --------------------------------------------------------------------------
   3. 顶部 Header (Topbar)
   -------------------------------------------------------------------------- */
.topbar {
  height: 60px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 90;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mobile-menu-toggle {
  display: none;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  border: 1px solid var(--border-light);
  background: var(--bg-surface);
}
.mobile-menu-toggle:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.page-header-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-header-title i {
  color: var(--primary);
  font-size: 16px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* --------------------------------------------------------------------------
   4. 主内容视窗 (Main Content)
   -------------------------------------------------------------------------- */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background-color: var(--bg-app);
  overflow-y: auto;
  position: relative;
}

.content-wrapper {
  padding: 24px;
  flex: 1;
  max-width: 1920px;
  margin: 0 auto;
  width: 100%;
}

/* 移动端遮罩 */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(25, 32, 38, 0.45);
  backdrop-filter: blur(2px);
  z-index: 95;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

/* --------------------------------------------------------------------------
   5. 响应式布局断点 (Responsive Breakpoints)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .content-wrapper {
    padding: 16px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    transform: translateX(-100%);
    width: 260px !important;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.2);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-backdrop.active {
    display: block;
    opacity: 1;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .topbar {
    padding: 0 14px;
    height: 54px;
  }

  .content-wrapper {
    padding: 12px;
  }
}