@charset "UTF-8";
/**
 * YCat Editor - 统一侧边栏组件 v1.1
 * 视觉升级：渐变色、去玻璃态、优化间距
 * 需配合 layout.css v3.1 使用
 * 保留所有旧组件名确保向后兼容
 */

/* ===== 侧边栏容器 ===== */
.sidebar-nav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  width: var(--nav-width);
  background: var(--surface);
  border-right: 1px solid var(--border);
  z-index: 150;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  transition: transform 0.3s ease, background var(--t), border-color var(--t), box-shadow var(--t);
}

[data-theme="dark"] .sidebar-nav {
  background: linear-gradient(180deg, var(--surface) 0%, rgba(26,29,46,0.98) 100%);
  border-right-color: var(--border);
}

/* 侧边栏顶部渐变线 */
.sidebar-nav::before {
  content: '';
  position: absolute;
  top: 0; left: 16px; right: 16px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand), transparent);
  opacity: 0.3;
}

/* ===== 侧边栏分组 ===== */
.sidebar-group {
  padding: 6px 0;
}

.sidebar-group + .sidebar-group {
  border-top: 1px solid var(--border);
  margin-top: 4px;
}

.sidebar-group-label {
  padding: 10px 20px 5px;
  font-size: 10px;
  font-weight: 700;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 1px;
  user-select: none;
}

/* ===== 侧边栏链接 ===== */
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s ease;
  border-left: 3px solid transparent;
  white-space: nowrap;
  margin: 1px 8px;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.sidebar-nav a:hover {
  color: var(--brand);
  background: var(--brand-dim);
}

.sidebar-nav a.active {
  color: var(--brand);
  background: var(--brand-dim);
  border-left-color: var(--brand);
  font-weight: 600;
  box-shadow: inset 3px 0 0 var(--brand);
}

.sidebar-nav a .nav-icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-nav a .nav-icon svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.sidebar-nav a .nav-label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 13px;
}

.sidebar-nav a .nav-badge {
  font-size: 10px;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  background: var(--danger);
  color: white;
  font-weight: 600;
  line-height: 1.4;
  min-width: 18px;
  text-align: center;
}

/* ===== 侧边栏底部 ===== */
.sidebar-bottom {
  margin-top: auto;
  padding: 12px 0;
  border-top: 1px solid var(--border);
}

/* ===== 主内容区偏移 ===== */
body.has-sidebar .page-body,
body.has-sidebar .main,
body.has-sidebar main {
  margin-left: var(--nav-width);
}

/* ===== Header 简化（有条边栏时导航隐藏） ===== */
body.has-sidebar .header-nav,
body.has-sidebar nav.nav-links {
  display: none !important;
}

/* 侧边栏切换按钮 */
.sidebar-toggle {
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: all var(--t);
  flex-shrink: 0;
}
.sidebar-toggle:hover {
  background: var(--brand-dim);
  border-color: var(--brand);
  color: var(--brand);
}

/* ===== 响应式 ===== */

/* 大屏：侧边栏始终显示 */
@media (min-width: 1025px) {
  .sidebar-nav {
    transform: translateX(0);
  }
  body.has-sidebar .mobile-sidebar-overlay {
    display: none;
  }
}

/* 平板/手机：侧边栏默认隐藏，点击显示 */
@media (max-width: 1024px) {
  .sidebar-nav {
    transform: translateX(-100%);
    z-index: 300;
    box-shadow: none;
  }
  .sidebar-nav.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }
  body.has-sidebar .page-body,
  body.has-sidebar .main,
  body.has-sidebar main {
    margin-left: 0;
  }
  .mobile-sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 250;
    backdrop-filter: blur(2px);
  }
  .mobile-sidebar-overlay.show {
    display: block;
  }
  .sidebar-toggle {
    display: flex !important;
  }
}

/* 大屏默认隐藏 toggle（除非侧边栏收起） */
@media (min-width: 1025px) {
  .sidebar-toggle {
    display: none !important;
  }
}

/* ===== 侧边栏滚动条 ===== */
.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: var(--radius-full);
}

/* ===== 侧边栏折叠态 ===== */
.sidebar-nav.collapsed {
  width: 56px;
}

.sidebar-nav.collapsed .nav-label,
.sidebar-nav.collapsed .sidebar-group-label,
.sidebar-nav.collapsed .nav-badge {
  display: none;
}

.sidebar-nav.collapsed a {
  justify-content: center;
  padding: 10px 0;
  border-left-width: 0;
  margin: 2px 6px;
  border-radius: var(--radius);
}

.sidebar-nav.collapsed a.active {
  border-left-width: 0;
  background: var(--brand-dim);
  box-shadow: none;
}

body.has-sidebar.sidebar-collapsed .page-body,
body.has-sidebar.sidebar-collapsed .main,
body.has-sidebar.sidebar-collapsed main {
  margin-left: 56px;
}