html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

.intro {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

    .intro img {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        min-width: 100%;
        min-height: 100%;
        width: auto;
        height: auto;
        object-fit: cover;
    }

.intro-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    color: white;
    text-align: center;
    width: 90%;
    max-width: 600px;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 20px;
    border-radius: 10px;
}

    .intro-content h1 {
        font-size: 2.5em;
        margin-bottom: 10px;
    }

    .intro-content p {
        font-size: 1.2em;
        margin-top: 0;
    }

.btn-primary {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    margin-top: 20px;
}

@media (max-width: 768px) {
    .intro-content h1 {
        font-size: 2em;
    }

    .intro-content p {
        font-size: 1em;
    }
}

@media (max-width: 480px) {
    .intro-content h1 {
        font-size: 1.5em;
    }

    .intro-content p {
        font-size: 0.9em;
    }
}