/* =========================================
   Sidebar Modern (RTL Native)
   ========================================= */

/* 1. Base Layout & Positioning */
.sidebar-modern {
    position: fixed;
    inset-block-start: 0;
    inset-block-end: 0;
    inset-inline-start: 0;
    /* Left in LTR, Right in RTL */

    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    z-index: var(--z-sidebar);

    display: flex;
    flex-direction: column;
    transition: transform var(--transition-normal), width var(--transition-normal);

    /* Shadow only on the inner side */
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
}

/* 2. Sidebar Header & Logo */
.sidebar-header {
    height: var(--navbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-inline: 1.5rem;
    border-bottom: 1px solid var(--sidebar-border-color);
    background-color: var(--sidebar-bg-dark);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: #fff;
    overflow: hidden;
}

.logo-wrapper {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.brand-logo {
    max-width: 100%;
    max-height: 100%;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    white-space: nowrap;
    opacity: 1;
    transition: opacity var(--transition-normal);
}

.sidebar-close-btn {
    background: none;
    border: none;
    color: var(--sidebar-text);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 4px;
}

/* 3. Navigation Content */
.sidebar-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding-block: 1rem;
    /* Thin Scrollbar */
    scrollbar-width: thin;
    scrollbar-color: #475569 transparent;
}

.sidebar-content::-webkit-scrollbar {
    width: 5px;
}

.sidebar-content::-webkit-scrollbar-thumb {
    background-color: #475569;
    border-radius: 4px;
}

.sidebar-nav {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-inline: 12px;
}

/* 4. Section Labels */
.nav-section-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #64748b;
    margin-block: 16px 8px;
    padding-inline-start: 16px;
    white-space: nowrap;
}

/* 5. Nav Items & Links */
.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    color: var(--sidebar-text);
    text-decoration: none;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
    font-weight: 500;
}

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

.nav-link.active,
.nav-link.active:hover {
    background-color: var(--sidebar-item-bg-active);
    color: var(--sidebar-item-text-active);
    box-shadow: 0 4px 6px -1px rgba(14, 165, 233, 0.2);
}

.nav-icon {
    width: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.nav-label {
    margin-inline-start: 12px;
    flex: 1;
    opacity: 1;
    transition: opacity var(--transition-normal);
}

.nav-arrow {
    font-size: 0.8rem;
    transition: transform var(--transition-normal);
    margin-inline-start: auto;
}

/* 6. Submenus (Accordion) */
.nav-submenu {
    list-style: none;
    padding: 0;
    margin: 0;
    overflow: hidden;
    max-height: 0;
    transition: max-height 400ms ease-in-out;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius-md);
    margin-top: 2px;
}

.nav-item.has-submenu.open>.nav-submenu {
    max-height: 1000px;
    /* Arbitrary large number for CSS transition */
}

.nav-item.has-submenu.open>.nav-link .nav-arrow {
    transform: rotate(180deg);
}

.submenu-link {
    display: block;
    padding: 8px 16px 8px 48px;
    /* Indent subitems */
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

/* RTL adjustment for padding implemented by logical properties automatically? 
   No, 'padding' 4th value is physical-left. We must use logical. */
.submenu-link {
    padding-block: 8px;
    padding-inline-start: 48px;
    padding-inline-end: 16px;
}

.submenu-link:hover {
    color: #fff;
}

.submenu-divider {
    height: 1px;
    background-color: rgba(255, 255, 255, 0.1);
    margin: 8px 16px;
}

/* 7. Footer / Help */
.mt-auto {
    margin-top: auto;
}

/* 8. Layout Offset for Fixed Sidebar */
.page-container {
    padding-inline-start: var(--sidebar-width);
    padding-inline-end: 0;
    transition: padding-inline-start var(--transition-normal), padding-inline-end var(--transition-normal);
}

body.is-collapsed .page-container {
    padding-inline-start: var(--sidebar-collapsed-width);
    padding-inline-end: 0;
}

/* =========================================
   Responsive & Collapsed States
   ========================================= */

/* Mobile Pattern (< 992px) */
@media (max-width: 991.98px) {
    .sidebar-modern {
        transform: translateX(calc(var(--sidebar-width) * -1));
        /* Physical shift left (assumes LTR default) */
    }

    /* RTL Mirroring for Mobile Transform */
    :root[dir="rtl"] .sidebar-modern:not(.show) {
        transform: translateX(var(--sidebar-width));
    }

    .sidebar-modern.show {
        transform: translateX(0);
    }

    /* Overlay */
    .sidebar-overlay {
        position: fixed;
        inset: 0;
        background-color: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(2px);
        z-index: var(--z-sidebar-overlay);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }

    .sidebar-overlay.show {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }
}

@media (max-width: 991.98px) {
    .page-container {
        padding-inline-start: 0;
        padding-inline-end: 0;
    }
}

/* Desktop Collapsed State (>= 992px) */
@media (min-width: 992px) {
    body.is-collapsed .sidebar-modern {
        width: var(--sidebar-collapsed-width);
    }

    body.is-collapsed .sidebar-brand .brand-name,
    body.is-collapsed .nav-label,
    body.is-collapsed .nav-arrow,
    body.is-collapsed .nav-section-label,
    body.is-collapsed .nav-submenu {
        display: none;
        opacity: 0;
    }

    body.is-collapsed .nav-link {
        padding-inline: 0;
        justify-content: center;
    }

    body.is-collapsed .nav-icon {
        margin-inline: 0;
        font-size: 1.25rem;
    }

    /* Hover to expand temporarily (Optional polish) */
    body.is-collapsed .sidebar-modern:hover {
        width: var(--sidebar-width);
    }

    body.is-collapsed .sidebar-modern:hover .brand-name,
    body.is-collapsed .sidebar-modern:hover .nav-label,
    body.is-collapsed .sidebar-modern:hover .nav-arrow,
    body.is-collapsed .sidebar-modern:hover .nav-section-label {
        display: initial;
        /* Restore visibility on hover */
        opacity: 1;
    }

    /* On hover, restore section labels behavior */
    body.is-collapsed .sidebar-modern:hover .nav-section-label {
        display: block;
    }

    body.is-collapsed .sidebar-modern:hover .nav-link {
        justify-content: flex-start;
        padding-inline: 16px;
    }
}