body {
    font-family: "Segoe UI", Arial, sans-serif;
    background: linear-gradient(135deg, #e8f5ff, #f9fcff);
    margin: 0;
    padding: 0;
}

.calculator-wrapper {
    max-width: 460px;
    background: #ffffff;
    margin: 30px auto;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
}

h1 {
    text-align: center;
    color: #0b5ed7;
    margin-bottom: 5px;
}

.intro {
    text-align: center;
    font-size: 14px;
    color: #555;
    margin-bottom: 20px;
}

.step-box {
    margin-bottom: 20px;
    padding: 15px;
    background: #f4f9ff;
    border-radius: 8px;
}

.step-box h2 {
    font-size: 16px;
    color: #0b5ed7;
    margin-bottom: 10px;
}

label {
    display: block;
    margin-top: 12px;
    font-weight: 600;
    font-size: 14px;
}

input {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    border-radius: 6px;
    border: 1px solid #ccc;
    font-size: 15px;
}

.helper {
    font-size: 12px;
    color: #666;
    margin-top: 6px;
}

button {
    width: 100%;
    padding: 14px;
    background: #0b5ed7;
    color: #ffffff;
    font-size: 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

button:hover {
    background: #094db5;
}

.result-box {
    display: none;
    margin-top: 20px;
    padding: 15px;
    background: #e9f5ff;
    border-radius: 8px;
    text-align: center;
}

.result-box h2 {
    color: #0b5ed7;
    margin-bottom: 10px;
}

.result-box p {
    font-size: 16px;
    margin: 8px 0;
    font-weight: bold;
}

.disclaimer {
    margin-top: 15px;
    font-size: 12px;
    color: #777;
    text-align: center;
}