.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
}

.sidebar-logo {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 20px;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-logo span {
    font-weight: 600;
    font-size: var(--text-lg);
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-link span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-nav {
    flex: 1;
    padding: 15px 0;
    overflow-y: auto;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    user-select: none;
}

.nav-link:hover {
    background-color: var(--bg-secondary);
    color: var(--accent-color);
}

.nav-item.active > .nav-link {
    background-color: rgba(13, 110, 253, 0.1);
    color: var(--accent-color);
    border-right: 3px solid var(--accent-color);
}

.nav-link .icon {
    width: 20px;
    height: 20px;
    margin-right: 12px;
}

.nav-link .arrow {
    width: 14px;
    height: 14px;
    margin-left: auto;
    transition: transform 0.3s;
}

.nav-group.open .arrow {
    transform: rotate(180deg);
}

.sub-nav {
    display: none;
    background-color: rgba(0, 0, 0, 0.02);
}

.nav-group.open .sub-nav {
    display: block;
}

.sub-nav .nav-link {
    padding-left: 52px;
    font-size: var(--text-sm);
}

[data-theme="dark"] .sub-nav {
    background-color: rgba(255, 255, 255, 0.02);
}