/* ── App shell ──────────────────────────────────────────────────────────── */
.bs-app-layout {
    display: flex;
    min-height: 100vh;
}

/* ── Sidebar ─────────────────────────────────────────────────────────────── */
.bs-sidebar {
    width: var(--bs-nav-width);
    background: var(--bs-nav-bg);
    color: var(--bs-nav-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.08) transparent;
}

.bs-sidebar::-webkit-scrollbar { width: 4px; }
.bs-sidebar::-webkit-scrollbar-track { background: transparent; }
.bs-sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

/* ── Main area ───────────────────────────────────────────────────────────── */
.bs-main {
    margin-left: var(--bs-nav-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: var(--bs-color-bg);
}

/* ── Topbar ──────────────────────────────────────────────────────────────── */
.bs-topbar {
    height: var(--bs-topbar-height);
    background: var(--bs-topbar-bg);
    border-bottom: 1px solid var(--bs-topbar-border);
    display: flex;
    align-items: center;
    padding: 0 var(--bs-spacing-lg);
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 1px 0 var(--bs-color-border);
}

/* ── Content ─────────────────────────────────────────────────────────────── */
.bs-content {
    padding: var(--bs-spacing-lg);
    flex: 1;
}

/* ── Page header ─────────────────────────────────────────────────────────── */
.bs-page-header {
    margin-bottom: var(--bs-spacing-lg);
}

.bs-page-title {
    font-size: var(--bs-font-size-h1);
    font-weight: 700;
    color: var(--bs-color-text);
    margin: 0 0 3px;
    letter-spacing: -0.025em;
    line-height: 1.3;
}

.bs-page-subtitle {
    font-size: var(--bs-font-size-base);
    color: var(--bs-color-text-secondary);
    margin: 0;
    line-height: 1.5;
}

/* ── Sidebar logo ────────────────────────────────────────────────────────── */
.bs-nav-logo {
    padding: 18px var(--bs-spacing-md);
    border-bottom: 1px solid var(--bs-nav-logo-border);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-logo-text {
    font-size: 1.05rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.02em;
    line-height: 1;
}

.sidebar-logo-badge {
    font-size: 0.6rem;
    font-weight: 600;
    background: var(--bs-color-primary);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

/* ── Sidebar nav ─────────────────────────────────────────────────────────── */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 10px 0 16px;
    scrollbar-width: none;
}
.sidebar-nav::-webkit-scrollbar { display: none; }

/* ── Section label ───────────────────────────────────────────────────────── */
.bs-nav-section {
    padding: 18px 16px 5px;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--bs-nav-section-text);
    user-select: none;
}

.bs-nav-section:first-child { padding-top: 10px; }

/* ── Nav item (top-level link or group toggle) ───────────────────────────── */
.bs-nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 16px;
    color: var(--bs-nav-text);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 450;
    transition: background var(--bs-transition), color var(--bs-transition);
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    border-left: 2px solid transparent;
    letter-spacing: -0.01em;
}

.bs-nav-item:hover {
    background: var(--bs-nav-bg-hover);
    color: var(--bs-nav-text-hover);
}

.bs-nav-item.active {
    background: var(--bs-nav-bg-active);
    color: var(--bs-nav-text-active);
    border-left-color: var(--bs-nav-border-active);
    font-weight: 500;
}

.bs-nav-icon {
    width: 16px;
    text-align: center;
    flex-shrink: 0;
    font-size: 0.85rem;
    opacity: 0.75;
}

.bs-nav-item:hover .bs-nav-icon,
.bs-nav-item.active .bs-nav-icon {
    opacity: 1;
}

/* ── Group toggle ────────────────────────────────────────────────────────── */
.sidebar-group-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 16px;
    color: var(--bs-nav-text);
    background: none;
    border: none;
    border-left: 2px solid transparent;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 450;
    transition: background var(--bs-transition), color var(--bs-transition);
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    letter-spacing: -0.01em;
}

.sidebar-group-toggle:hover {
    background: var(--bs-nav-bg-hover);
    color: var(--bs-nav-text-hover);
}

.sidebar-group-toggle.group-active {
    color: var(--bs-nav-text-hover);
}

.sidebar-item-label { flex: 1; }

.sidebar-arrow {
    font-size: 0.58rem;
    opacity: 0.5;
    transition: transform var(--bs-transition);
    flex-shrink: 0;
}

.sidebar-arrow-open { transform: rotate(90deg); opacity: 0.7; }

/* ── Sub-nav ─────────────────────────────────────────────────────────────── */
.sidebar-sub {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.22s ease;
}

.sidebar-sub.sidebar-sub-open {
    max-height: 1000px;
}

.sidebar-sub-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 16px 7px 40px;
    color: var(--bs-nav-text);
    font-size: 0.82rem;
    font-weight: 400;
    text-decoration: none;
    transition: background var(--bs-transition), color var(--bs-transition);
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    border-left: 2px solid transparent;
    letter-spacing: -0.005em;
}

.sidebar-sub-item:not(.sidebar-soon):hover {
    background: var(--bs-nav-bg-hover);
    color: var(--bs-nav-text-hover);
}

.sidebar-sub-item.active {
    background: var(--bs-nav-bg-active);
    color: var(--bs-nav-text-active);
    border-left-color: var(--bs-nav-border-active);
    font-weight: 500;
}

.sidebar-sub-item .oi {
    font-size: 0.72rem;
    opacity: 0.6;
    flex-shrink: 0;
}

.sidebar-sub-item.active .oi {
    opacity: 1;
}

.sidebar-soon { opacity: 0.35; cursor: default; }

.sidebar-badge {
    margin-left: auto;
    font-size: 0.6rem;
    background: rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.5);
    padding: 2px 7px;
    border-radius: 10px;
    white-space: nowrap;
    letter-spacing: 0.02em;
}

/* ── Mobile sidebar overlay ───────────────────────────────────────────────── */
.bs-mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 99;
    backdrop-filter: blur(2px);
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 1024px) and (min-width: 769px) {
    .bs-sidebar {
        width: 56px;
        overflow-x: hidden;
        transition: width var(--bs-transition-slow);
    }

    .bs-sidebar.open {
        width: var(--bs-nav-width);
        overflow-x: visible;
        box-shadow: 4px 0 24px rgba(0,0,0,0.2);
    }

    .bs-main {
        margin-left: 56px;
        transition: margin-left var(--bs-transition-slow);
    }

    .bs-sidebar.open ~ .bs-main {
        margin-left: var(--bs-nav-width);
    }

    .bs-nav-section,
    .sidebar-item-label,
    .sidebar-badge,
    .sidebar-arrow {
        opacity: 0;
        transition: opacity var(--bs-transition);
    }

    .bs-sidebar.open .bs-nav-section,
    .bs-sidebar.open .sidebar-item-label,
    .bs-sidebar.open .sidebar-badge,
    .bs-sidebar.open .sidebar-arrow {
        opacity: 1;
    }
}

@media (max-width: 768px) {
    .bs-sidebar {
        transform: translateX(-100%);
        transition: transform var(--bs-transition-slow);
        width: var(--bs-nav-width);
        z-index: 200;
        box-shadow: none;
    }

    .bs-sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 24px rgba(0,0,0,0.25);
    }

    .bs-mobile-overlay {
        display: block;
    }

    .bs-main {
        margin-left: 0 !important;
    }

    .bs-content {
        padding: var(--bs-spacing-md);
    }

    .bs-topbar {
        padding: 0 var(--bs-spacing-md);
    }
}