.ck-portal-sidebar {
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    background: #111827;
    color: #fff;
}

.app-shell {
    display: flex;
    min-height: 100vh;
}

.app-shell > .ck-portal-sidebar {
    position: sticky;
    top: 0;
    flex: 0 0 260px;
    width: 260px;
    height: 100vh;
    min-height: 100vh;
    overflow-y: auto;
}

.app-shell > .main-content {
    flex: 1;
    min-width: 0;
}

body.ck-portal-page {
    padding-left: 260px;
}

body.ck-portal-page > .ck-portal-sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: 210px;
    min-height: 100vh;
    overflow-y: auto;
    z-index: 1000;
}

.ck-portal-sidebar .sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 22px 18px;
}

.ck-portal-sidebar .sidebar-brand img {
    flex: 0 0 52px;
    width: 52px;
    height: 52px;
    object-fit: contain;
}

.ck-portal-sidebar .sidebar-brand-text h2 {
    margin: 0;
    color: #fff;
    font-size: 1rem;
    line-height: 1.25;
}

.ck-portal-sidebar .sidebar-brand-text span {
    display: block;
    margin-top: 4px;
    color: #d1d5db;
    font-size: 0.78rem;
}

.ck-portal-sidebar .sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 8px 12px;
}

.ck-portal-sidebar .nav-section-title,
.ck-portal-sidebar .sidebar-section-title {
    padding: 8px 10px;
    color: #9ca3af;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.ck-portal-sidebar .nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 44px;
    padding: 10px 12px;
    border-radius: 8px;
    color: #e5e7eb;
    font-size: 0.88rem;
    text-decoration: none;
}

.ck-portal-sidebar .nav-link i {
    width: 18px;
    text-align: center;
}

.ck-portal-sidebar .nav-link:hover,
.ck-portal-sidebar .nav-link:focus-visible,
.ck-portal-sidebar .nav-link.active {
    background: #374151;
    color: #fff;
}

.ck-portal-sidebar .sidebar-footer {
    margin-top: auto;
    padding: 12px;
}

@media (max-width: 760px) {
    body.ck-portal-page {
        padding-left: 76px;
    }

    body.ck-portal-page > .ck-portal-sidebar {
        width: 76px;
    }

    body.ck-portal-page > .ck-portal-sidebar .sidebar-brand {
        justify-content: center;
    }

    body.ck-portal-page > .ck-portal-sidebar .sidebar-brand-text,
    body.ck-portal-page > .ck-portal-sidebar .nav-section-title,
    body.ck-portal-page > .ck-portal-sidebar .sidebar-section-title,
    body.ck-portal-page > .ck-portal-sidebar .nav-link span {
        display: none;
    }

    body.ck-portal-page > .ck-portal-sidebar .nav-link {
        justify-content: center;
        padding-right: 8px;
        padding-left: 8px;
    }

    .ck-portal-sidebar .sidebar-brand {
        padding: 16px 12px;
    }

    .ck-portal-sidebar .sidebar-nav {
        padding-right: 8px;
        padding-left: 8px;
    }
}