/* Navigation & Sidebar Styles */
:root {
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 70px;
    --sidebar-bg: #16191c;
    --sidebar-color: #ced4da;
    --sidebar-active-bg: #0d6efd;
    --sidebar-hover-bg: #22272b;
    --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;
    box-sizing: border-box;
}

.main-shell.ltr .sidebar {
    left: 0;
    right: auto;
    border-right: 1px solid #2b3035;
}

.main-shell.rtl .sidebar {
    right: 0;
    left: auto;
    border-left: 1px solid #2b3035;
}

.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 #2b3035;
}

.sidebar-logo {
    font-weight: 700;
    font-size: 1.25rem;
    white-space: nowrap;
    overflow: hidden;
    color: #fff;
}

.nav-scrollable {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0.75rem 0.5rem;
}

/* Base Nav Links */
.sidebar .nav-item {
    width: 100%;
}

.sidebar .nav-item .nav-link {
    color: var(--sidebar-color) !important;
    padding: 0.6rem 0.75rem;
    border-radius: 8px;
    margin: 2px 0;
    display: flex;
    align-items: center;
    white-space: nowrap;
    transition: background-color 0.2s ease, color 0.2s ease;
    font-size: 0.925rem;
    min-width: 0;
    box-sizing: border-box;
    width: 100%;
}

.sidebar .nav-text {
    flex: 1 1 auto;
    min-width: 0 !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
    text-align: start !important;
}

.main-shell.rtl .sidebar .nav-text,
[dir="rtl"] .sidebar .nav-text {
    text-align: right !important;
}

.main-shell.ltr .sidebar .nav-text,
[dir="ltr"] .sidebar .nav-text {
    text-align: left !important;
}

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

.sidebar .nav-item .nav-link.active {
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
    color: #fff !important;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(13, 110, 253, 0.35);
}

.sidebar .nav-link i.sidebar-parent-icon,
.sidebar .nav-link i:first-child {
    font-size: 1.15rem;
    min-width: 1.75rem;
    text-align: center;
    flex-shrink: 0 !important;
}

.sidebar.collapsed .nav-text,
.sidebar.collapsed .sidebar-chevron-icon,
.sidebar.collapsed .sidebar-chevron-btn {
    display: none !important;
}

/* Parent Dropdown Headers */
.sidebar-parent-wrapper {
    margin-bottom: 4px;
    width: 100%;
}

.sidebar-parent-btn,
.sidebar-parent-row {
    font-weight: 600 !important;
    color: #f8f9fa !important;
    border-radius: 8px;
    transition: background-color 0.2s ease;
    width: 100%;
}

.sidebar-parent-btn.expanded,
.sidebar-parent-btn[aria-expanded="true"],
.sidebar-parent-row.expanded {
    background-color: rgba(255, 255, 255, 0.08) !important;
    color: #fff !important;
}

/* Chevron Arrows */
.sidebar-chevron-icon {
    font-size: 0.8rem !important;
    min-width: 1rem !important;
    text-align: center;
    flex-shrink: 0 !important;
    margin-inline-start: auto !important;
    opacity: 0.8;
}

.sidebar-parent-btn.expanded .sidebar-chevron-icon,
.sidebar-parent-btn[aria-expanded="true"] .sidebar-chevron-icon,
.sidebar-parent-row.expanded .sidebar-chevron-icon {
    opacity: 1 !important;
}

/* Submenu Container */
.sidebar-submenu {
    list-style: none;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    margin: 4px 6px 8px 6px !important;
    padding: 4px 0 !important;
    border: 1px solid rgba(255, 255, 255, 0.06);
    box-sizing: border-box;
}

.main-shell.ltr .sidebar-submenu {
    border-left: 3px solid #0d6efd;
    padding-left: 2px !important;
}

.main-shell.rtl .sidebar-submenu,
[dir="rtl"] .sidebar-submenu {
    border-right: 3px solid #0d6efd;
    padding-right: 2px !important;
}

.sidebar .sidebar-submenu .nav-item .nav-link {
    padding: 0.45rem 0.65rem;
    font-size: 0.85rem;
    color: #a0aec0 !important;
    border-radius: 6px;
    margin: 2px 4px;
    width: calc(100% - 8px);
}

.sidebar .sidebar-submenu .nav-item .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: #fff !important;
}

.sidebar .sidebar-submenu .nav-item .nav-link.active {
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%) !important;
    color: #ffffff !important;
    font-weight: 600;
    box-shadow: 0 2px 6px rgba(13, 110, 253, 0.4);
}

.sidebar .sidebar-submenu .nav-item .nav-link i {
    font-size: 0.95rem;
    min-width: 1.5rem;
    opacity: 0.85;
    flex-shrink: 0 !important;
}

/* Main Content Area */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin var(--transition-speed);
    min-width: 0;
}

.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;
    }
}