.sales-calculator {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.calculator-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.calculator-icon {
    width: 2rem;
    height: 2rem;
    color: #4f46e5;
}

.calculator-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1f2937;
    margin: 0;
}

.input-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: #374151;
}

.input-group label::after {
    content: " *";
    color: #ef4444;
}

.input-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    transition: all 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: #4f46e5;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.calculate-button {
    width: 100%;
    padding: 0.75rem;
    background: #4f46e5;
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

.calculate-button:hover {
    background: #4338ca;
}

.error-message {
    margin: 1rem 0;
    padding: 0.75rem;
    background-color: #fee2e2;
    border: 1px solid #ef4444;
    border-radius: 0.5rem;
    color: #b91c1c;
    font-size: 0.875rem;
}

.result-display {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: linear-gradient(to right, #eef2ff, #e0e7ff);
    border-radius: 0.75rem;
    text-align: center;
}

.result-display h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: #1f2937;
    margin: 0 0 0.5rem 0;
}

.result-amount {
    font-size: 1.875rem;
    font-weight: 700;
    color: #4f46e5;
    margin: 0.5rem 0;
}

.result-display p {
    font-size: 0.875rem;
    color: #6b7280;
    margin: 0;
}