* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: linear-gradient(135deg, #ff9a9e, #fad0c4);
    color: #333;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

h1 {
    margin-top: 20px;
    margin-bottom: 20px;
    font-size: 3rem;
    text-align: center;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

#presentation-div {
    background-color: rgba(255,255,255,0.9);
    border-radius: 10px;
    padding: 30px;
    max-width: 500px;
    width: 90%;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
}

#cat-hello {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 20px;
}

#before-begin {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: #555;
}

#start-question-button {
    background-color: #ff6f61;
    color: #fff;
    border: none;
    border-radius: 5px;
    font-size: 1.2rem;
    padding: 12px 24px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#start-question-button:hover {
    background-color: #ff4d3d;
}

@media only screen and (max-width: 767px) {
    body {
        padding: 10px;
    }
    h1 {
        font-size: 2.5rem;
    }
    #presentation-div {
        padding: 20px;
    }
    #before-begin {
        font-size: 1rem;
    }
    #start-question-button {
        font-size: 1rem;
        padding: 10px 20px;
    }
}

@media only screen and (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }
    #presentation-div {
        margin: 10px auto;
        padding: 15px;
    }
    #before-begin {
        font-size: 0.9rem;
    }
    #start-question-button {
        font-size: 0.9rem;
        padding: 8px 16px;
    }
}