body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px 40px;
}

.toggle-section {
    border-bottom: 1px solid #ddd;
    padding: 20px 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.section-header h2 {
    margin: 0;
}

.toggle-btn {
    padding: 6px 14px;
    border: 1px solid #555;
    background: #f5f5f5;
    color: #333;
    cursor: pointer;
    border-radius: 4px;
    font-size: 0.85em;
}

.toggle-btn:hover {
    background: #e5e5e5;
}

/* This is the class JS toggles to actually hide a section.
   display:none removes it from layout entirely, so nothing
   below it leaves a gap. */
.hidden .section-body {
    display: none;
}