/* Wrapper structure */
.wrapper {
    display: flex;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

#sidebar {
    width: 260px;
    min-width: 260px;
    background-color: var(--sidebar-bg) !important;
    color: #F8FAFC;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: all 0.25s ease;
    z-index: 1000;
}

#sidebar-brand {
    padding: 1.5rem;
    border-bottom: 1px solid #1E293B;
}

#sidebar-brand a {
    color: #FFFFFF !important;
    text-decoration: none;
}

#sidebar-menu {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1.25rem 0.75rem;
}

#sidebar-menu::-webkit-scrollbar {
    width: 4px;
}
#sidebar-menu::-webkit-scrollbar-thumb {
    background-color: #334155;
    border-radius: 4px;
}

.sidebar-heading {
    padding: 0.75rem 1rem 0.4rem 1rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #64748B;
}

.nav-link-vms {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--sidebar-color) !important;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.875rem;
    text-decoration: none;
    transition: all 0.2s ease;
    margin-bottom: 0.25rem;
}

.nav-link-vms i {
    width: 16px;
    text-align: center;
}

.nav-link-vms:hover {
    color: var(--sidebar-active-color) !important;
    background-color: var(--sidebar-active-bg);
}

.nav-link-vms.active {
    color: #FFFFFF !important;
    background-color: var(--primary-color) !important;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

#content-wrapper {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

#topbar {
    height: 70px;
    min-height: 70px;
    background-color: var(--topbar-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    transition: all 0.25s ease;
}

#main-content {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1.5rem;
    background-color: var(--bg-color);
}

/* Sidebar Regions Sub-Menu Links */
.nav-link-sub-vms {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.45rem 0.75rem;
    color: #94A3B8 !important;
    font-size: 0.825rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
    border-radius: 6px;
    margin-bottom: 0.15rem;
}

.nav-link-sub-vms i {
    color: #0ea5e9 !important; /* light sky blue location marker */
    font-size: 0.8rem;
    opacity: 0.8;
    transition: color 0.2s ease, opacity 0.2s ease;
}

.nav-link-sub-vms:hover {
    color: #F8FAFC !important;
    background-color: var(--sidebar-active-bg) !important;
}

.nav-link-sub-vms:hover i {
    color: #38bdf8 !important;
    opacity: 1;
}

.nav-link-sub-vms.active {
    color: #FFFFFF !important;
    background-color: var(--primary-color) !important;
    font-weight: 600;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
}

.nav-link-sub-vms.active i {
    color: #FFFFFF !important;
    opacity: 1;
}