styles.css

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    text-align: center;
    width: 500px; /* Increased container width */
}

h1 {
    margin-bottom: 20px;
}

.layer {
    display: none; /* Hide all layers by default */
    border: 2px solid #007bff; /* Border for visual nesting */
    border-radius: 8px;
    margin: 10px; /* Margin to create space between layers */
    padding: 10px; /* Padding for internal spacing */
    position: relative; /* Relative positioning for child layers */
}

.layer-button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.layer-button:hover {
    background-color: #0056b3;
}

.checkbox-list {
    text-align: left;
    margin: 20px 0;
    max-height: 150px; /* Set a max height for scrolling */
    overflow-y: auto; /* Enable scrolling if needed */
}

.methodology-box {
    margin-top: 20px;
    text-align: left;
}

.methodology-box ul {
    list-style-type: none;
    padding: 0;
}

.methodology-box li {
    background-color: #e9ecef;
    margin: 5px 0;
    padding: 10px;
    border-radius: 5px;
}

.copyright {
    margin-top: 20px;
    font-size: 12px;
}

/* Show the first layer by default */
.layer.layer-1 {
    display: block;
}