body {
    font-family: Arial, sans-serif;
    background-color: #f5f7fa;
}

.sales-container {
    max-width: 1000px; /* Limit form width on large screens */
    margin: auto;
    padding: 15px;
}

.sales-card {
    background: #fff;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.sales-card h2 {
    font-size: 18px;
    margin-bottom: 15px;
    border-bottom: 1px solid #eee;
    padding-bottom: 8px;
}

/* Fixed number of columns on desktop */
.sales-fields {
    display: grid;
    grid-template-columns: repeat(3, 1fr); 
    gap: 15px;
}

.sales-fields > div {
    min-width: 200px;
}

.sales-fields label {
    font-size: 12px;
    color: #555;
    display: block;
    margin-bottom: 5px;
}

/* Buttons side by side */
.button-group {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

/* Button colors */
.btn-primary {
    background-color: #3b82f6;
    color: #fff !important;
}

.btn-secondary {
    background-color: #6b7280;
    color: #fff !important;
}

.btn-light {
    background-color: #e5e7eb;
    color: #000 !important;
}

/* Tablet view: 2 columns */
@media (max-width: 992px) {
    .sales-fields {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile view: 1 column */
@media (max-width: 600px) {
    .sales-fields {
        grid-template-columns: 1fr;
    }
}