/* ===================================
 *  sidebar.css — 左侧导航栏
 * =================================== */

.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--color-sidebar-bg);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: sticky;
  top: 0;
}

.sidebar-header {
  padding: 1.5rem 1.2rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

.site-logo {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--color-text);
}
.site-logo:hover {
  text-decoration: none;
}

.nav-list {
  list-style: none;
  padding: 0.5rem 0;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  display: block;
  padding: 0.6rem 1.2rem;
  font-size: 0.95rem;
  color: var(--color-text);
  border-left: 3px solid transparent;
  transition: background 0.15s, border-color 0.15s;
}

.nav-item:hover {
  background: #eee;
  text-decoration: none;
  border-left-color: var(--color-text);
}

.nav-item.active {
  background: #eaeaea;
  border-left-color: var(--color-text);
  font-weight: 600;
}