/* =============================================
   EXPERTISE
   ============================================= */

.expertise__layout {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-24);
    align-items: start;
}

/* Sticky left column on desktop */
@media (min-width: 901px) {
    .expertise__left {
        position: sticky;
        top: calc(72px + var(--space-8));
    }
}

.expertise__lead {
    font-size: 1rem;
    color: var(--color-muted);
    line-height: 1.75;
    margin-bottom: var(--space-10);
    max-width: 36ch;
}

/* ── Right: numbered list ─────────────────── */

.expertise__list {
    display: flex;
    flex-direction: column;
    list-style: none;
}

.expertise__item {
    display: grid;
    grid-template-columns: 44px 1fr;
    gap: var(--space-5);
    padding-block: var(--space-8);
    border-top: 1px solid var(--color-border);
}

.expertise__item:last-child {
    border-bottom: 1px solid var(--color-border);
}

.expertise__item-num {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    opacity: 0.5;
    padding-top: 4px;
}

.expertise__item-title {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-ink);
    margin-bottom: var(--space-2);
}

.expertise__item-text {
    font-size: 0.875rem;
    color: var(--color-muted);
    line-height: 1.75;
}

/* ── Responsive ───────────────────────────── */

@media (max-width: 900px) {
    .expertise__layout {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }

    .expertise__lead {
        max-width: 100%;
    }
}