css
body {
    background-image: linear-gradient(45deg, #FF0000 0 0, #00FF00 0 0);
    background-size: 20px 20px;
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
    color: #000;
}

.wavefunction {
    background-color: #333;
    padding: 10px 20px 10px 20px;
    border: 4px solid #000;
    font-family: Arial, sans-serif;
    font-weight: bold;
}

.wavefunction h2 {
    text-align: center;
    margin-bottom: 10px;
    font-size: 24px;
    font-weight: bold;
}

.wavefunction p {
    text-align: center;
    margin: 0;
}

.wavefunction a {
    text-decoration: none;
    color: #FF0000;
}

.wavefunction a:hover {
    text-decoration: underline;
}

.wavefunction .quiz {
    background-color: #444;
    padding: 10px 20px 10px 20px;
    border: 4px solid #000;
    border-radius: 10px;
    box-shadow: 0 0 5px #000;
}

.wavefunction .quiz p {
    margin: 0;
}

.wavefunction .quiz a {
    text-decoration: none;
    color: #FF0000;
}

.wavefunction .quiz a:hover {
    text-decoration: underline;
}

.wavefunction .answer {
    background-color: #333;
    padding: 10px 20px 10px 20px;
    border: 4px solid #000;
    border-radius: 10px;
    box-shadow: 0 0 5px #000;
}

.wavefunction .answer p {
    margin: 0;
}

.wavefunction .answer a {
    text-decoration: none;
    color: #FF0000;
}

.wavefunction .answer a:hover {
    text-decoration: underline;
}