#ppc-roi-calculator {
    max-width: 600px;
    margin: 20px auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 10px;
    background: #ffffff;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
    font-family: Arial, sans-serif;
}

#ppc-roi-calculator h2 {
    color: #e63946;
    text-align: center;
}

#ppc-roi-calculator p {
    text-align: center;
    color: #555;
    margin-bottom: 20px;
}

#ppc-roi-calculator .field {
    margin-bottom: 20px;
}

#ppc-roi-calculator label {
    display: block;
    font-weight: bold;
    margin-bottom: 10px;
}

#ppc-roi-calculator input[type="range"] {
    width: 100%;
}

#ppc-roi-calculator span {
    display: block;
    text-align: right;
    margin-top: 5px;
    font-size: 14px;
    color: #333;
}

#ppc-roi-calculator button {
    display: block;
    width: 100%;
    padding: 10px;
    font-size: 16px;
    color: #fff;
    background-color: #e63946;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#ppc-roi-calculator button:hover {
    background-color: #d62828;
}

#roi-results {
    margin-top: 20px;
    font-size: 16px;
    color: #333;
}