.roi-calculator {
    margin: 3rem 0;
    padding: 1.5rem;
    border: 1px solid #e5e7eb;
    border-radius: 1rem;
    background: #f8fafc;
}

.roi-calculator h2 {
    color: #111827;
}

.roi-calculator-intro {
    margin-bottom: 1.25rem;
    color: #4b5563;
}

.roi-calculator-fields {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.roi-calculator-field {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.roi-calculator-field label {
    color: #374151;
    font-size: 0.875rem;
    font-weight: 600;
}

.roi-calculator-field input {
    width: 100%;
    box-sizing: border-box;
    padding: 0.65rem 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    background: #ffffff;
    color: #111827;
    font: inherit;
}

.roi-calculator-results {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.roi-calculator-result {
    padding: 0.9rem;
    border-radius: 0.75rem;
    background: #111827;
    color: #ffffff;
}

.roi-calculator-result-label {
    display: block;
    margin-bottom: 0.35rem;
    color: #cbd5e1;
    font-size: 0.75rem;
}

.roi-calculator-result-value {
    font-size: 1.15rem;
    font-weight: 700;
}

.roi-calculator-message {
    margin: 1rem 0 0;
    padding: 0.8rem 1rem;
    border-left: 3px solid #06b6d4;
    background: #ecfeff;
    color: #164e63;
    font-weight: 600;
}

.roi-calculator-note {
    margin: 1rem 0 0;
    color: #6b7280;
    font-size: 0.8rem;
}

@media (max-width: 640px) {
    .roi-calculator-fields,
    .roi-calculator-results {
        grid-template-columns: 1fr;
    }
}