.profit-calculator {
    max-width: 600px;
    margin: 20px auto;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.calculator-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.tab-button {
    padding: 10px 20px;
    border: none;
    background: #f0f0f0;
    cursor: pointer;
    border-radius: 4px;
    flex: 1;
}

.tab-button.active {
    background: #007bff;
    color: white;
}

.calculator-content {
    display: none;
}

.calculator-content.active {
    display: block;
}

.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.input-group input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

button {
    width: 100%;
    padding: 10px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 10px;
}

button:hover {
    background: #0056b3;
}

.result {
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 4px;
    font-weight: bold;
}