html {
    cursor: text;
}

body {
    width: 100%;
    background-color: #fff;
}

.passage {
    width: 65%;
    margin: 0 auto;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 1.6em;
    line-height: 1.5;
    text-align: justify;
    padding: 20px;
    color: transparent;
    letter-spacing: 0.01em;
    touch-action: manipulation;
    -webkit-touch-callout: none;
    -webkit-user-select: text;
    user-select: text;
}

@media (max-width: 768px) {
    .passage {
        width: 90%;
        font-size: 1.4em;
        line-height: 1.5;
        padding: 15px;
    }
    
    .word {
        padding: 2px 4px;
    }
}

::selection {
    background: transparent;
}

.word.preview {
    color: rgba(0, 0, 0, 0.2);
    transition: color 0.1s ease;
}

.word.revealed {
    color: #000;
    transition: color 0.2s ease;
}