.presentation {
        max-width: 800px;
        margin: 50px auto;
        padding: 20px 30px;
    }

    .presentation h1 {
        font-size: 1.8em;
        margin-bottom: 20px;
        color: #f1c40f;
        text-shadow: 2px 2px #000;
        text-align: center;
    }

    .presentation p {
        font-size: 1.2em;
        line-height: 1.6;
        margin-bottom: 20px;
    }

    .presentation ul {
        list-style: none;
        padding: 0;
        margin: 20px 0;
    }

    .presentation ul li {
        font-size: 1.1em;
        margin: 10px 0;
        position: relative;
        padding-left: 25px;
    }

    .presentation ul li::before {
        content: "✅";
        position: absolute;
        left: 0;
        color: #2ecc71;
    }

    .join-btn {
        display: inline-block;
        padding: 12px 25px;
        background-color: #e74c3c;
        color: #fff;
        font-size: 1.2em;
        text-decoration: none;
        border-radius: 8px;
        transition: background 0.3s;
    }

    .join-btn:hover {
        background-color: #c0392b;
    }