body {
    font-family: sans-serif;
    background-color: #f0f4f8;
    color: #333;
    display: flex;
    justify-content: center;
    padding: 20px;
}

.simulator-container {
    background-color: #fff;
    padding: 20px 40px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    max-width: 700px;
    width: 100%;
}

h1 {
    text-align: center;
    color: #fff;
    background-color: #008080; /* Teal */
    padding: 15px;
    border-radius: 5px;
    margin: -20px -40px 20px -40px;
}

.input-area {
    margin-bottom: 30px;
}

.form-group {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.form-group label {
    width: 200px;
    font-weight: bold;
}

.form-group input {
    flex-grow: 1;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    text-align: right;
}

.form-group span {
    margin-left: 10px;
}

button#calculate-btn {
    display: block;
    width: 100%;
    padding: 12px;
    font-size: 1.2em;
    font-weight: bold;
    color: #fff;
    background-color: #f0ad4e; /* Orange */
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 20px;
}

button#calculate-btn:hover {
    background-color: #ec971f;
}

.result-area table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.result-area th, .result-area td {
    border: 1px solid #ddd;
    padding: 12px;
}

.result-area th {
    background-color: #f7f7f7;
    text-align: left;
    width: 40%;
}

.result-area td {
    text-align: right;
    font-weight: bold;
    font-size: 1.2em;
}

.total-row {
    background-color: #eaf6ff;
}

.total-row td {
    color: #d9534f; /* Red */
    font-size: 1.4em;
}

.caution {
    font-size: 0.9em;
    color: #555;
    background-color: #fef9e7;
    border-left: 5px solid #f0ad4e;
    padding: 10px;
    line-height: 1.6;
}

.notes {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.notes h2 {
    color: #008080;
    border-left: 5px solid #008080;
    padding-left: 10px;
}
.notes ul, .notes p {
    line-height: 1.7;
}