.navbar-lessons {
    background-color: var(--color-canvas-default);
    border-bottom: 1px solid var(--color-border-muted);
    padding: 0.5rem 1rem;
}

.navbar-lessons .navbar-brand {
    color: var(--color-fg-default);
    font-weight: 600;
    font-size: 1.25rem;
}

.navbar-lessons .navbar-toggler {
    border-color: var(--color-border-default);
    padding: 0.25rem 0.5rem;
}

.navbar-lessons .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(36, 41, 47, 0.75)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}


.navbar-lessons .nav-link {
    color: var(--color-fg-muted);
    padding: 0.5rem 1rem;
    transition: color 0.15s ease-in-out;
}

.navbar-lessons .nav-link:hover,
.navbar-lessons .nav-link:focus {
    color: var(--color-fg-default);
}

.navbar-lessons .nav-link.active {
    color: var(--color-accent-fg);
    font-weight: 500;
}

@media (max-width: 991.98px) {
    .navbar-lessons .navbar-collapse {
        background-color: var(--color-canvas-default);
        padding: 1rem;
        border-radius: 6px;
        box-shadow: 0 1px 3px rgba(0,0,0,0.12);
        margin-top: 0.5rem;
    }
    
    .navbar-lessons .nav-link {
        padding: 0.75rem 1rem;
        border-radius: 6px;
    }
    
    .navbar-lessons .nav-link:hover {
        background-color: var(--color-canvas-subtle);
    }
}