.columns {
    display: flex;
    gap: 5rem;
}

.menu {
    flex: 0 0 200px;
}

.menu ul {
    list-style: none;
}

.menu li + li {
    margin-top: 0.9rem;
}

.menu a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    transition: color 0.2s ease;
}

.menu a:hover {
    color: var(--text);
}

.menu a.active {
    color: var(--text);
    font-weight: 500;
}

.content {
    flex: 1;
    max-width: 640px;
}

.content h1 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 1.2rem;
}

.content p {
    font-size: 1.05rem;
    line-height: 1.7;
    color: #333333;
}

@media (max-width: 720px) {
    .columns {
        flex-direction: column;
        gap: 2.5rem;
    }

    .menu {
        flex: none;
    }
}