body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f6f8;
    margin: 0;
    padding: 0;
    color: #222;
}

.calculator-container {
    max-width: 650px;
    margin: 40px auto;
    background: #ffffff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #0b5ed7;
}

.intro {
    text-align: center;
    font-size: 16px;
    margin-bottom: 25px;
}

.calculator-box label {
    display: block;
    margin-top: 15px;
    font-weight: bold;
}

.calculator-box input {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    font-size: 16px;
}

.calculator-box button {
    width: 100%;
    margin-top: 20px;
    padding: 12px;
    font-size: 18px;
    background: #0b5ed7;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.calculator-box button:hover {
    background: #0949a8;
}

.result-box {
    margin-top: 25px;
    padding: 15px;
    background: #e9f1ff;
    border-left: 5px solid #0b5ed7;
    display: none;
}

.seo-content {
    margin-top: 30px;
}

.seo-content h2 {
    color: #0b5ed7;
    margin-top: 20px;
}