/* Sidebar menu — pola spa-NG, tema LPPM UNUD */
:root {
    --sidebar-width: 260px;
    --sidebar-nav-icon: 32px;
}

.app-sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: linear-gradient(180deg, #002244 0%, var(--primary-color) 55%, #004488 100%);
    border-right: none;
    box-shadow: 4px 0 18px rgba(0, 0, 0, 0.12);
    position: fixed;
    top: 56px;
    left: 0;
    bottom: 0;
    z-index: 1020;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.app-sidebar .sidebar-nav {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0.65rem 0 1rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.25) transparent;
}

.app-sidebar .sidebar-nav::-webkit-scrollbar { width: 5px; }
.app-sidebar .sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.22);
    border-radius: 4px;
}

.app-sidebar .sidebar-section-label {
    padding: 0.55rem 1rem 0.35rem;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.45);
}

.app-sidebar .nav-group { margin-bottom: 1px; }

.app-sidebar .nav-group-header {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.55rem 0.85rem;
    margin: 0 0.45rem;
    color: rgba(255, 255, 255, 0.82);
    cursor: pointer;
    user-select: none;
    border-radius: 10px;
    transition: background 0.2s ease, color 0.2s ease;
}

.app-sidebar .nav-group-header:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.app-sidebar .nav-group-header.open,
.app-sidebar .nav-group-header.active {
    background: rgba(255, 204, 0, 0.14);
    color: var(--accent-color);
}

.app-sidebar .nav-icon {
    width: var(--sidebar-nav-icon);
    height: var(--sidebar-nav-icon);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    flex-shrink: 0;
    font-size: 0.9rem;
}

.app-sidebar .nav-label {
    flex: 1;
    min-width: 0;
    font-size: 0.8rem;
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: 0.02em;
}

.app-sidebar .nav-arrow {
    font-size: 0.65rem;
    opacity: 0.75;
    transition: transform 0.25s ease;
    flex-shrink: 0;
}

.app-sidebar .nav-group-header.open .nav-arrow { transform: rotate(90deg); }

.app-sidebar .nav-children {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.32s ease;
}

.app-sidebar .nav-children.open { max-height: 1200px; }

.app-sidebar .nav-child-item,
.app-sidebar .nav-single {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.48rem 0.85rem 0.48rem 3.15rem;
    margin: 0 0.45rem;
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.78rem;
    line-height: 1.3;
    border-radius: 8px;
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease, padding-left 0.2s ease;
}

.app-sidebar .nav-single {
    padding-left: 0.85rem;
    margin-top: 1px;
    margin-bottom: 1px;
}

.app-sidebar .nav-child-item i,
.app-sidebar .nav-single .nav-icon i {
    font-size: 0.78rem;
    width: 1rem;
    text-align: center;
    flex-shrink: 0;
}

.app-sidebar .nav-child-item:hover,
.app-sidebar .nav-single:hover {
    background: rgba(255, 255, 255, 0.07);
    color: #fff;
}

.app-sidebar .nav-child-item.active,
.app-sidebar .nav-single.active {
    background: linear-gradient(90deg, rgba(255, 204, 0, 0.22), transparent);
    color: #fff;
    border-left: 3px solid var(--accent-color);
    padding-left: calc(3.15rem - 3px);
}

.app-sidebar .nav-single.active {
    padding-left: calc(0.85rem - 3px);
}

.app-sidebar .nav-child-item span,
.app-sidebar .nav-single .nav-label {
    flex: 1;
    min-width: 0;
    word-break: break-word;
}

.app-sidebar .nav-single.nav-guide {
    margin-top: 0.5rem;
    color: rgba(255, 204, 0, 0.95);
}

.app-sidebar .nav-single.nav-guide:hover {
    background: rgba(255, 204, 0, 0.12);
    color: #ffe566;
}

.app-layout main.app-main {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    min-height: calc(100vh - 56px);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 56px 0 0 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1015;
}

.sidebar-overlay.show { display: block; }

@media (max-width: 767.98px) {
    .app-sidebar {
        transform: translateX(-100%);
        transition: transform 0.28s ease;
    }
    .app-sidebar.show {
        transform: translateX(0);
    }
    .app-layout main.app-main {
        margin-left: 0;
        width: 100%;
    }
}