.main-section {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(320px, 1fr);
    gap: 14px;
    min-height: 100%;
}

.main-left,
.main-right {
    min-height: 0;
    padding: 16px;
    border-radius: 20px;
    background: linear-gradient(180deg, rgba(255,255,255,0.84), rgba(255,255,255,0.62));
    border: 1px solid rgba(72, 113, 159, 0.10);
    box-shadow: 0 14px 34px rgba(53, 55, 71, 0.06);
}

.section-card-header {
    margin-bottom: 12px;
}

    .section-card-header h2 {
        margin: 0;
        color: var(--surface-dark);
        font-size: 1.3rem;
        font-weight: 800;
        letter-spacing: -0.02em;
    }

.placeholder-list {
    margin: 0;
    padding-left: 18px;
}

    .placeholder-list li {
        margin-bottom: 8px;
    }

@media (max-width: 1280px) {
    .main-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .main-left,
    .main-right {
        padding: 12px;
    }
}