:root {
    --sidebar-width-expanded: 250px;
    --sidebar-width-collapsed: 60px;
    --topbar-height: 56px;
    --footer-height: 40px;
    --transition-speed: 0.25s;
    --sidebar-bg: var(--bs-light);
    --sidebar-text: var(--bs-dark);
    --sidebar-icon: var(--bs-secondary);
    --sidebar-hover-bg: var(--bs-gray-200);
    --sidebar-active-bg: var(--bs-primary-subtle);
    --sidebar-active-text: var(--bs-primary-emphasis);
    --sidebar-border: var(--bs-border-color-translucent);
    --topbar-bg: var(--bs-body-bg);
    --topbar-border: var(--bs-border-color-translucent);
    --content-bg: var(--bs-body-bg);
    --footer-bg: var(--bs-light);
    --icon-color: var(--bs-secondary);
    --icon-hover-color: var(--bs-dark);
}

[data-bs-theme="dark"] {
    --sidebar-bg: rgb(var(--bs-body-bg-rgb));
    --sidebar-text: rgb(var(--bs-body-color-rgb));
    --sidebar-icon: var(--bs-secondary);
    --sidebar-hover-bg: var(--bs-gray-800);
    --sidebar-active-bg: var(--bs-primary-subtle);
    --sidebar-active-text: var(--bs-primary-emphasis);
    --sidebar-border: var(--bs-border-color-translucent);
    --topbar-bg: rgb(var(--bs-body-bg-rgb));
    --topbar-border: var(--bs-border-color-translucent);
    --content-bg: var(--bs-body-bg);
    --footer-bg: rgb(var(--bs-body-bg-rgb));
    --icon-color: var(--bs-secondary);
    --icon-hover-color: rgb(var(--bs-body-color-rgb));
}

    [data-bs-theme="dark"] #themeToggleBtn .bi-sun {
        display: none !important;
    }

[data-bs-theme="light"] #themeToggleBtn .bi-moon {
    display: none !important;
}

body {
    transition: padding-left var(--transition-speed) ease-in-out;
    background-color: var(--content-bg);
}

@media (min-width: 992px) {
    body {
        padding-left: var(--sidebar-width-collapsed);
    }

        body.sidebar-expanded {
            padding-left: var(--sidebar-width-expanded);
        }
}

html {
    overflow-x: hidden;
}

.topbar {
    height: var(--topbar-height);
    z-index: 1030;
    background-color: var(--topbar-bg);
    border-bottom-color: var(--topbar-border) !important;
}

.topbar-actions .btn-icon {
    color: var(--icon-color);
}

    .topbar-actions .btn-icon:hover {
        color: var(--icon-hover-color);
        background-color: var(--sidebar-hover-bg);
    }

.theme-icon-light, body.dark-mode .theme-icon-dark {
    display: inline-block;
}

.theme-icon-dark, body.dark-mode .theme-icon-light {
    display: none;
}

.sidebar-toggle-btn {
    color: var(--sidebar-icon);
}

    .sidebar-toggle-btn:hover {
        color: var(--sidebar-text);
        background-color: var(--sidebar-hover-bg);
    }

@media (min-width: 992px) {
    body.sidebar-pinned .topbar .sidebar-toggle-btn {
        display: none !important;
    }
}

.sidebar {
    width: var(--sidebar-width-collapsed);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1020;
    transition: width var(--transition-speed) ease-in-out;
    background-color: var(--sidebar-bg);
    border-right-color: var(--sidebar-border) !important;
    overflow: hidden;
}

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

.pin-toggle-btn {
    color: var(--sidebar-icon);
    opacity: 0;
    transition: opacity var(--transition-speed) ease-in-out;
    pointer-events: none;
}

.sidebar.expanded .pin-toggle-btn {
    opacity: 1;
    pointer-events: auto;
}

.pin-toggle-btn:hover {
    color: var(--sidebar-text);
    background-color: var(--sidebar-hover-bg);
}

.sidebar-header {
    height: var(--topbar-height);
    flex-shrink: 0;
}

.offcanvas-start {
    width: var(--sidebar-width-expanded);
    background-color: var(--sidebar-bg);
    border-right-color: var(--sidebar-border) !important;
}

.offcanvas-body {
    color: var(--sidebar-text);
}

.offcanvas-header {
    border-bottom-color: var(--sidebar-border) !important;
}

.offcanvas .sidebar-footer {
    border-top-color: var(--sidebar-border) !important;
}

.offcanvas .user-profile-btn {
    color: var(--sidebar-icon);
}

    .offcanvas .user-profile-btn:hover {
        color: var(--sidebar-text);
        background-color: var(--sidebar-hover-bg) !important;
    }

.offcanvas .user-name-expanded {
    display: inline !important;
    opacity: 1 !important;
}

.sidebar-nav {
    scrollbar-width: thin;
    scrollbar-color: rgba(128, 128, 128, 0.3) transparent;
}

[data-bs-theme="dark"] .sidebar-nav {
    scrollbar-color: rgba(200, 200, 200, 0.2) transparent;
}

.sidebar-nav::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background-color: rgba(128, 128, 128, 0.3);
    border-radius: 10px;
}

[data-bs-theme="dark"] .sidebar-nav::-webkit-scrollbar-thumb {
    background-color: rgba(200, 200, 200, 0.2);
}

.sidebar-nav .nav-link,
.sidebar-nav .btn-toggle {
    color: var(--sidebar-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: background-color 0.15s ease-in-out, color 0.15s ease-in-out;
}

    .sidebar-nav .nav-link i,
    .sidebar-nav .btn-toggle i {
        color: var(--sidebar-icon);
        transition: color 0.15s ease-in-out;
        flex-shrink: 0;
    }

    .sidebar-nav .nav-link:hover,
    .sidebar-nav .btn-toggle:hover {
        background-color: var(--sidebar-hover-bg);
        color: var(--sidebar-text);
    }

        .sidebar-nav .nav-link:hover i,
        .sidebar-nav .btn-toggle:hover i {
            color: var(--sidebar-text);
        }

    .sidebar-nav .nav-link.active,
    .sidebar-nav .btn-toggle[aria-expanded="true"] {
        background-color: var(--sidebar-active-bg);
        color: var(--sidebar-active-text);
        font-weight: 500;
    }

        .sidebar-nav .nav-link.active i,
        .sidebar-nav .btn-toggle[aria-expanded="true"] i {
            color: var(--sidebar-active-text);
        }

.sidebar-nav .collapse .nav-link.active {
    background-color: transparent;
    color: var(--bs-primary);
    font-weight: 500;
}

    .sidebar-nav .collapse .nav-link.active i {
        color: var(--bs-primary);
    }

[data-bs-theme="dark"] .sidebar-nav .collapse .nav-link.active,
[data-bs-theme="dark"] .sidebar-nav .collapse .nav-link.active i {
    color: var(--bs-primary-emphasis);
}

.sidebar-arrow {
    font-size: 0.7rem;
    transition: transform var(--transition-speed) ease-in-out;
    opacity: 0.6;
}

.btn-toggle[aria-expanded="true"] .sidebar-arrow {
    transform: rotate(-180deg);
}

.sidebar:not(.expanded) .menu-text,
.sidebar:not(.expanded) .user-name-expanded,
.sidebar:not(.expanded) .sidebar-arrow {
    display: none;
    opacity: 0;
    transition: none;
    width: 0;
}

.sidebar:not(.expanded) .nav-link,
.sidebar:not(.expanded) .btn-toggle {
    justify-content: center;
}

.sidebar:not(.expanded) .menu-icon {
    margin-right: 0 !important;
}

.sidebar:not(.expanded) .collapse {
    display: none !important;
}

.sidebar .sidebar-footer {
    height: calc(var(--topbar-height) + 1px);
    border-top-color: var(--sidebar-border) !important;
}

.sidebar .user-profile-btn {
    color: var(--sidebar-icon);
}

    .sidebar .user-profile-btn:hover {
        color: var(--sidebar-text);
        background-color: var(--sidebar-hover-bg) !important;
    }

.sidebar-divider {
    height: 1px;
    margin: 0.5rem 1rem;
    background-color: var(--sidebar-border);
    border: 0;
    opacity: 0.5;
}

.sidebar:not(.expanded) .sidebar-divider {
    margin: 0.5rem 0.5rem;
}

.offcanvas .sidebar-divider {
    margin: 0.5rem 1rem;
}

.footer {
    height: var(--footer-height);
    background-color: var(--footer-bg);
    border-top-color: var(--topbar-border) !important;
}

.admin-card {
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

    .admin-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important;
    }

/* .text-truncate class removed to avoid conflict with Bootstrap */

.btn-icon {
    padding: 0.375rem 0.5rem;
    line-height: 1;
}

    .btn-icon:focus {
        box-shadow: none !important;
    }

body.preload-transitions,
body.preload-transitions .sidebar {
    transition: none !important;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition: none !important;
        animation: none !important;
    }
}

/* Responsive polish for Desktop/Notebook/Mobile */
@media (max-width: 991.98px) {
    .topbar {
        padding-left: 0.75rem !important;
        padding-right: 0.75rem !important;
    }

    .offcanvas-start {
        width: min(86vw, 320px);
    }

    #mainContent .content-wrapper {
        padding: 1rem !important;
    }

    .footer {
        min-height: var(--footer-height);
        height: auto;
        padding: 0.5rem 0.75rem;
        text-align: center;
    }
}

@media (max-width: 575.98px) {
    .navbar-brand img {
        height: 24px;
    }

    .topbar-actions {
        gap: 0.25rem !important;
    }

    .topbar-actions .btn-icon,
    .sidebar-toggle-btn {
        padding: 0.35rem !important;
    }

    .topbar-actions .btn-icon i,
    .sidebar-toggle-btn i {
        font-size: 1rem !important;
    }

    .footer small {
        font-size: 0.75rem;
        line-height: 1.4;
    }
}