.inv-lines-header,
.inv-line {
    display: grid;
    grid-template-columns: 1fr 4rem 5rem 5.5rem 2.5rem;
    gap: 0.5rem;
    align-items: center;
    font-size: 0.85rem;
}

.inv-lines-header {
    font-weight: 600;
    margin: 1rem 0 0.5rem;
    opacity: 0.85;
}

.inv-lines {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.inv-line input {
    width: 100%;
    min-width: 0;
}

.inv-totals {
    margin: 1rem 0;
    text-align: right;
}

.inv-totals p {
    margin: 0.25rem 0;
}

.inv-grand {
    font-size: 1.1rem;
    margin-top: 0.5rem !important;
}

.inv-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

@media (max-width: 640px) {
    .inv-lines-header { display: none; }
    .inv-line {
        grid-template-columns: 1fr 1fr;
        border: 1px solid var(--border, rgba(255, 255, 255, 0.12));
        border-radius: 0.5rem;
        padding: 0.5rem;
    }
    .inv-line input:first-child { grid-column: 1 / -1; }
}