body {
    font-family: Arial, sans-serif;
}

.container {
    width: 80%;
    margin: 0 auto;
}

.header {
    cursor: pointer;
    padding: 10px;
    background-color: #f1f1f1;
    border: 1px solid #ccc;
    margin-top: 5px;
    display: flex;
    align-items: center;
}

.header .arrow {
    margin-right: 10px;
    transition: transform 0.3s;
}

.content {
    display: none;
    padding: 10px;
    border: 1px solid #ccc;
    border-top: none;
}