/* ===================================================
   REMS – Sidebar (dark bluish rail; scoped under .rems-sidebar)
   =================================================== */

.rems-sidebar {
    width: var(--sidebar-w);
    height: 100vh;
    background-color: #0f172a;
    background: linear-gradient(180deg, var(--sidebar-bg, #0f172a) 0%, var(--sidebar-bg-deep, #0c1222) 100%);
    color: rgba(255, 255, 255, 0.92);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 200;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: width var(--transition, 0.25s ease), transform var(--transition, 0.25s ease);
    box-shadow: var(--sidebar-shadow, 4px 0 24px rgba(0, 0, 0, 0.28));
    border-right: 1px solid var(--sidebar-divider, rgba(255, 255, 255, 0.06));
}

.rems-wrapper.sidebar-collapsed .rems-sidebar {
    width: 0;
    overflow: hidden;
}

/* ----- Brand ----- */
.rems-sidebar .sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 1.25rem 1.1rem;
    border-bottom: 1px solid var(--sidebar-divider, rgba(255, 255, 255, 0.06));
    flex-shrink: 0;
    white-space: nowrap;
    background: transparent;
}

.rems-sidebar .brand-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm, 10px);
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: #fff;
    box-shadow: var(--sidebar-brand-icon-shadow, 0 4px 14px rgba(99, 102, 241, 0.4));
}

.rems-sidebar .brand-text {
    flex: 1;
    min-width: 0;
}
.rems-sidebar .brand-name {
    display: block;
    font-size: 1rem;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: 0.02em;
    line-height: 1.2;
}
.rems-sidebar .brand-sub {
    display: block;
    font-size: 0.7rem;
    color: var(--sidebar-text-label, rgba(255, 255, 255, 0.4));
    font-weight: 400;
}

.rems-sidebar .sidebar-close-btn {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--transition, 0.25s ease), color var(--transition, 0.25s ease);
}
.rems-sidebar .sidebar-close-btn:hover {
    background: rgba(255, 255, 255, 0.14);
    color: #fff;
}

/* ----- Nav scroll ----- */
.rems-sidebar .sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0.75rem 0;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.12) transparent;
}
.rems-sidebar .sidebar-nav::-webkit-scrollbar {
    width: 4px;
}
.rems-sidebar .sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}
.rems-sidebar .sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.12);
    border-radius: 2px;
}

/* ----- Sections ----- */
.rems-sidebar .nav-section {
    padding: 0.5rem 0;
}
.rems-sidebar .nav-section + .nav-section {
    border-top: 1px solid var(--sidebar-divider, rgba(255, 255, 255, 0.06));
}

.rems-sidebar .nav-section-label {
    display: block;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--sidebar-text-label, rgba(255, 255, 255, 0.34));
    padding: 0.5rem 1.1rem 0.3rem;
}

.rems-sidebar .nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

/* ----- Links ----- */
.rems-sidebar .nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1.1rem;
    border-radius: 0;
    color: var(--sidebar-text, rgba(255, 255, 255, 0.68)) !important;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    background: transparent !important;
    width: 100%;
    text-align: left;
    transition: background var(--transition, 0.25s ease), color var(--transition, 0.25s ease);
    white-space: nowrap;
    position: relative;
    text-decoration: none !important;
}

.rems-sidebar .nav-link:hover {
    background: var(--sidebar-hover-bg, rgba(255, 255, 255, 0.06)) !important;
    color: var(--sidebar-text-hover, #ffffff) !important;
}

.rems-sidebar .nav-link.active,
.rems-sidebar .nav-link.active:hover {
    background: rgba(99, 102, 241, 0.2) !important;
    background: var(--sidebar-active-bg) !important;
    color: var(--sidebar-active-text, #a5b4fc) !important;
}
.rems-sidebar .nav-link.active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    border-radius: 0 3px 3px 0;
    background: var(--sidebar-accent, #6366f1);
}

.rems-sidebar .nav-link--danger {
    color: var(--sidebar-text, rgba(255, 255, 255, 0.68)) !important;
}
.rems-sidebar .nav-link--danger:hover {
    background: rgba(244, 63, 94, 0.12) !important;
    color: #fda4af !important;
}

.rems-sidebar .nav-icon {
    flex-shrink: 0;
    width: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.rems-sidebar .nav-link.active .nav-icon {
    color: var(--sidebar-active-text, #a5b4fc);
}

.rems-sidebar .nav-arrow {
    margin-left: auto;
    font-size: 0.65rem;
    color: var(--sidebar-text-label, rgba(255, 255, 255, 0.34));
    transition: transform var(--transition, 0.25s ease);
}
.rems-sidebar .nav-item--has-sub.open > .nav-link--parent .nav-arrow {
    transform: rotate(90deg);
    color: var(--sidebar-accent, #6366f1);
}

/* ----- Submenus ----- */
.rems-sidebar .nav-submenu {
    list-style: none;
    margin: 0;
    padding: 0.25rem 0;
    background: var(--sidebar-submenu-bg, rgba(0, 0, 0, 0.22));
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s ease;
}
.rems-sidebar .nav-submenu.open {
    max-height: 400px;
}

.rems-sidebar .nav-sublink {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 1.1rem 0.55rem 2.7rem;
    color: rgba(255, 255, 255, 0.52) !important;
    font-size: 0.82rem;
    font-weight: 500;
    transition: background var(--transition, 0.25s ease), color var(--transition, 0.25s ease);
    border-radius: 0;
    white-space: nowrap;
    text-decoration: none !important;
}
.rems-sidebar .nav-sublink:hover {
    background: rgba(255, 255, 255, 0.05) !important;
    color: rgba(255, 255, 255, 0.88) !important;
}
.rems-sidebar .nav-sublink.active {
    color: var(--sidebar-sublink-active-text, #a5b4fc) !important;
    background: var(--sidebar-sublink-active-bg, rgba(99, 102, 241, 0.15)) !important;
}
.rems-sidebar .nav-sublink i {
    font-size: 0.75rem;
    opacity: 0.85;
}

@media (max-width: 991.98px) {
    .rems-sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-w) !important;
    }
    .rems-sidebar.mobile-open {
        transform: translateX(0);
    }
    .rems-wrapper.sidebar-collapsed .rems-sidebar {
        width: var(--sidebar-w) !important;
        transform: translateX(-100%);
    }
}