.app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 240px;
    background: #004481;
    color: white;
    transition: 0.3s;
}

    .sidebar.collapsed {
        width: 70px;
    }

.logo {
    padding: 20px;
    text-align: center;
    font-weight: bold;
}

.menu {
    list-style: none;
    padding: 0;
}

    .menu li {
        padding: 12px 20px;
    }

        .menu li a {
            color: white;
            text-decoration: none;
            display: flex;
            gap: 10px;
        }

        .menu li:hover {
            background: rgba(255,255,255,0.1);
        }

.menu-title {
    padding: 10px 20px;
    font-size: 12px;
    opacity: 0.7;
}

.menu-group {
    padding: 0 !important;
}

.menu-group details {
    width: 100%;
}

.menu-group summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 20px;
    cursor: pointer;
    color: white;
}

.menu-group summary::-webkit-details-marker {
    display: none;
}

.menu-group summary:hover,
.submenu li:hover {
    background: rgba(255,255,255,0.1);
}

.menu-group__label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.menu-group__icon {
    transition: transform 0.2s ease;
}

.menu-group details[open] .menu-group__icon {
    transform: rotate(180deg);
}

.submenu {
    list-style: none;
    padding: 0 0 8px;
    margin: 0;
    background: rgba(0,0,0,0.08);
}

.submenu li {
    padding: 10px 20px 10px 34px;
}

.submenu li a {
    color: white;
    text-decoration: none;
    display: flex;
    gap: 10px;
    font-size: 14px;
}

.submenu-title {
    padding: 10px 20px 6px 34px !important;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.72;
    cursor: default;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.topbar {
    height: 60px;
    background: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

.content {
    padding: 20px;
    background: #F5F7FA;
}

@media (max-width: 768px) {
    .sidebar {
        position: absolute;
        left: -240px;
        z-index: 1000;
    }

        .sidebar.collapsed {
            left: 0;
        }
}