body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}
.method-content {
    display: none;
}
.active {
    display: block;
}
.tab-active {
    background-color: #4299e1;
    color: white;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}
th, td {
    border: 1px solid #e2e8f0;
    padding: 0.5rem;
    text-align: left;
    font-size: 0.875rem;
}
th {
    background-color: #f8fafc;
}
.formula {
    font-family: "Courier New", monospace;
    background-color: #f8fafc;
    padding: 0.5rem;
    border-radius: 0.25rem;
    overflow-x: auto;
    margin: 1rem 0;
}
.data-input {
    width: 100%;
    min-height: 100px;
    font-family: monospace;
}
.chart-container {
    width: 100%;
    height: 400px;
    margin: 1rem 0;
}