body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
}

#content {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

nav {
    text-align: center;
    margin: 20px 0;
}

.buttons {
    display: flex;
    justify-content: space-between;
    max-width: 800px;
    margin: 0 auto;
}

.previous, .next {
    text-decoration: none;
    padding: 10px;
    border: 1px solid #ccc;
    background-color: #f4f4f4;
}

.previous:hover, .next:hover {
    background-color: #ccc;
}

.previous {
    display: none;
}

.previous:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

img {
    max-width: 100%;
    height: auto;
}
.participant {
    margin-bottom: 1em;
}