/* Navigation Container */
.nav-container {
    height: calc(100vh - var(--header-height));
    width: var(--nav-width);
    position: fixed;
    z-index: 1000;
    top: var(--header-height);
    left: 0;
    background-color: var(--color-black);
    overflow-x: hidden;
    overflow-y: auto;
    transition: left 0.3s ease;
    padding-top: var(--spacing-4);
    box-shadow: var(--shadow-lg);
    border: none;
}

/* Navigation Items */
.nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-item {
    margin: 0;
    padding: 0;
}

.nav-link {
    width: 100%;
    padding: 15px 25px;
    text-decoration: none;
    font-size: 16px;
    color: var(--color-white);
    display: flex;
    align-items: center;
    transition: 0.3s;
    border: none;
    background: none;
    cursor: pointer;
    box-sizing: border-box;
}

.nav-link:hover {
    background-color: var(--color-primary);
}

.nav-link.active {
    background-color: var(--color-primary);
}

.nav-icon {
    margin-right: var(--spacing-4);
    font-size: var(--font-size-xl);
    width: 1.25em;
    display: inline-flex;
    justify-content: center;
}

.nav-icon img {
    width: 1em;
    height: 1em;
    vertical-align: middle;
}

/* Main Content Shift — persistent sidebar on desktop */
body.admin-app .app-main {
    margin-left: var(--nav-width);
    transition: margin-left 0.3s;
}

/* Hamburger Menu Button — hidden on desktop, shown on mobile */
.menu-toggle {
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    content: '';
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    position: absolute;
    transition: transform 0.3s, background-color 0.3s;
}

.hamburger::before {
    transform: translateY(-8px);
}

.hamburger::after {
    transform: translateY(8px);
}

.menu-toggle.open .hamburger {
    background-color: transparent;
}

.menu-toggle.open .hamburger::before {
    transform: translateY(0) rotate(45deg);
}

.menu-toggle.open .hamburger::after {
    transform: translateY(0) rotate(-45deg);
}

.menu-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

/* Mobile: off-canvas sidebar */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    body.admin-app .nav-container {
        left: calc(-1 * var(--nav-width));
    }

    body.admin-app .nav-container.open {
        left: 0;
    }

    body.admin-app .app-main {
        margin-left: 0;
    }
}

/* Submenu styling (legacy) */
.has-submenu {
    position: relative;
}

.submenu {
    display: none;
    background-color: var(--color-black);
    padding-left: var(--spacing-5);
    list-style: none;
    margin: 0;
}

.has-submenu.expanded .submenu {
    display: block;
}

.submenu-toggle {
    margin-left: var(--spacing-2);
    cursor: pointer;
    float: right;
    padding-right: var(--spacing-4);
    transition: opacity 0.3s ease;
}

.submenu-toggle i {
    font-size: 0.875rem;
    transition: opacity 0.3s ease;
}

.nav-item[data-hidden="true"] {
    display: none !important;
}