body {
    font-family: Arial, sans-serif;
    background: #f4f6f8;
    padding: 20px;
}

.calculator-container {
    max-width: 420px;
    margin: auto;
    background: #ffffff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 0 12px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #2c3e50;
}

.subtitle {
    text-align: center;
    font-size: 14px;
    color: #666;
    margin-bottom: 20px;
}

label {
    display: block;
    margin-top: 12px;
    font-weight: bold;
}

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

button {
    width: 100%;
    margin-top: 20px;
    padding: 12px;
    background: #27ae60;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
}

button:hover {
    background: #219150;
}

.result-box {
    margin-top: 20px;
    padding: 15px;
    border-radius: 6px;
    display: none;
}

.green { background: #eafaf1; color: #1e8449; }
.yellow { background: #fff9e6; color: #7d6608; }
.red { background: #fdecea; color: #922b21; }

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