#wrapper {
    display: flex;
    align-items: stretch;
    width: 100%;
    min-height: 100vh;
}

#sidebar-wrapper {
    min-width: 260px;
    max-width: 260px;
    background: #111827; /* Tailwind Gray 900 */
    color: #f3f4f6;
    transition: margin-left 0.3s ease;
    display: flex;
    flex-direction: column;
    border-right: 1px solid #1f2937;
}

#sidebar-wrapper.collapsed {
    margin-left: -260px;
}

#sidebar-wrapper .sidebar-heading {
    padding: 1.5rem 1.25rem;
    font-size: 1.25rem;
    font-weight: 700;
    border-bottom: 1px solid #1f2937;
    background: #1f2937;
    color: #ffffff;
    letter-spacing: 0.05em;
}

#sidebar-wrapper .list-group {
    width: 100%;
    border-radius: 0;
}

#sidebar-wrapper .list-group-item {
    background: transparent;
    color: #9ca3af;
    border: none;
    padding: 1rem 1.5rem;
    font-weight: 500;
    transition: all 0.2s ease-in-out;
    display: flex;
    align-items: center;
    text-decoration: none;
}

#sidebar-wrapper .list-group-item i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

#sidebar-wrapper .list-group-item:hover {
    background: #1f2937;
    color: #ffffff;
}

#sidebar-wrapper .list-group-item.active {
    background: #4f46e5; /* Indigo 600 */
    color: #ffffff;
    font-weight: 600;
    border-left: 4px solid #818cf8;
}

#page-content-wrapper {
    width: 100%;
    background-color: #f9fafb;
    display: flex;
    flex-direction: column;
}

/* Toggle Hamburger Button Styling */
.menu-toggle-btn {
    border: none;
    background: transparent;
    font-size: 1.25rem;
    padding: 0.5rem;
    color: #4b5563;
    cursor: pointer;
    transition: color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.menu-toggle-btn:hover {
    color: #111827;
}