2021 Anki - Nightmode on Android

Current question:
How to use .nightMode {} to avoid database entries from being recolored?
https://docs.ankimobile.net/night-mode.html

My current card styling
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.card {
 #font-family: arial;
 font-size: 20px;
 text-align: center;
 color: black;
 background-color: white;
}

.card1 { background-color: #ffffff; }
@font-face { font-family: simsun; src: url('_simsun.ttf'); }
.keyword { font-size: 40px; font-weight: bold;}
.hanzi { font-size: 150px; font-family: simsun; src: url('_simsun.ttf');}
.traditional { font-size: 100px; font-family: simsun; src: url('_simsun.ttf');}
.pinyin { font-size: 65px; font-family: Meiryo;}
.story { font-size: 18px; color: #999}