/* Navigation & Sidebar Styles */
:root {
    --sidebar-width: 250px;
    --sidebar-collapsed-width: 70px;
    --sidebar-bg: #1a1e21;
    --sidebar-color: #dee2e6;
    --sidebar-active-bg: #0d6efd;
    --sidebar-hover-bg: #2b3035;
    --topbar-height: 60px;
    --transition-speed: 0.3s;
}

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

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    color: var(--sidebar-color);
    transition: width var(--transition-speed);
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: fixed;
    top: 0;
    z-index: 1000;
}

.main-shell.ltr .sidebar {
    left: 0;
    border-right: 1px solid #343a40;
}

.main-shell.rtl .sidebar {
    right: 0;
    border-left: 1px solid #343a40;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar-header {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    border-bottom: 1px solid #343a40;
}

.sidebar-logo {
    font-weight: bold;
    font-size: 1.25rem;
    white-space: nowrap;
    overflow: hidden;
}

.nav-scrollable {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 0;
}

.sidebar .nav-item .nav-link {
    color: var(--sidebar-color) !important;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    white-space: nowrap;
    transition: background-color 0.2s;
}

.sidebar .nav-item .nav-link:hover {
    background-color: var(--sidebar-hover-bg);
    color: #fff;
}

.sidebar .nav-item .nav-link.active {
    background-color: var(--sidebar-active-bg);
    color: #fff;
}

.nav-link i {
    font-size: 1.2rem;
    min-width: 2rem;
    text-align: center;
}

.sidebar.collapsed .nav-text {
    display: none;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin var(--transition-speed);
}

.main-shell.ltr .main-content {
    margin-left: var(--sidebar-width);
}

.main-shell.rtl .main-content {
    margin-right: var(--sidebar-width);
}

.main-shell.ltr .sidebar.collapsed+.main-content {
    margin-left: var(--sidebar-collapsed-width);
}

.main-shell.rtl .sidebar.collapsed+.main-content {
    margin-right: var(--sidebar-collapsed-width);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .sidebar {
        width: 0;
        visibility: hidden;
    }

    .sidebar.mobile-show {
        width: var(--sidebar-width);
        visibility: visible;
    }

    .main-shell.ltr .main-content,
    .main-shell.rtl .main-content {
        margin-left: 0 !important;
        margin-right: 0 !important;
    }
}

/* Sidebar Submenu Polish */
.sidebar-submenu {
    margin: 0;
}
.main-shell.ltr .sidebar-submenu {
    padding-left: 1rem !important;
    padding-right: 0 !important;
}
.main-shell.rtl .sidebar-submenu {
    padding-right: 1rem !important;
    padding-left: 0 !important;
}
.sidebar .sidebar-submenu .nav-item .nav-link {
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
}