body {
    background-color: black;
    color: white;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    display: flex;
    align-items: center;
    padding: 10px;
    background-color: black;
}

header img {
    height: 50px;
    margin-right: 20px;
}

header h1 {
    margin: 0;
}

.container {
    display: flex;
    justify-content: space-around;
    margin: 20px;
}

.box {
    background-color: black;
    padding: 20px;
    border-radius: 8px;
    width: 45%;
}

.collapsible {
    margin: 20px;
}

.collapsible-button {
    background-color: black;
    color: white;
    border: none;
    padding: 10px;
    text-align: left;
    width: 100%;
    font-size: 16px;
    cursor: pointer;
    border-radius: 8px;
}

.collapsible-button:after {
    content: '\25BC';  /* Arrow symbol */
    float: right;
}

.collapsible-button.active:after {
    content: "\25B2";  /* Up arrow symbol */
}

.collapsible-content {
    display: none;
    background-color: black;
    padding: 20px;
    border-radius: 8px;
    margin-top: 10px;
}

.iframe-container {
    margin: 20px;
}