body {
    background: linear-gradient(rgba(0,0,0,0.3), rgba(0,0,0,0.3)), url('背景ダイアン津田.png');
    background-size: cover;
    background-attachment: fixed;
    color: #e0e0e0;
    font-family: 'Courier New', monospace;
    padding: 20px;
}
header { border-bottom: 3px solid #333; margin-bottom: 20px; }
#trigger-box { text-align: center; padding: 20px; background: #fff; border-radius: 10px; margin: 20px 0; }
button { padding: 15px 30px; font-size: 1.2em; cursor: pointer; background: #ff4500; color: white; border: none; border-radius: 5px; }
#message { font-weight: bold; color: #ff4500; margin-top: 15px; font-size: 1.5em; }
li::marker {
    content: "";
}
.hidden {
    display: none;
}

#warningDisplay {
    margin-top: 20px;
    text-align: center;
    border: 3px solid red;
    padding: 20px;
    background-color: #ffe6e6;
}