Default styles

[ghost]

Hi! I cannot grasp where default styles are coming from. I use maintenance.min.css but it clashes with injected styles before. I want to get rid of them:

<style type="text/css">
        html {
            background: #f1f1f1;
        }
        body {
            background: #fff;
            color: #444;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
            margin: 2em auto;
            padding: 1em 2em;
            max-width: 700px;
            -webkit-box-shadow: 0 1px 3px rgba(0,0,0,0.13);
            box-shadow: 0 1px 3px rgba(0,0,0,0.13);
        }
        h1 {
            border-bottom: 1px solid #dadada;
            clear: both;
            color: #666;
            font-size: 24px;
            margin: 30px 0 0 0;
            padding: 0;
            padding-bottom: 7px;
        }
        #error-page {
            margin-top: 50px;
        }
        #error-page p {
            font-size: 14px;
            line-height: 1.5;
            margin: 25px 0 20px;
        }
        #error-page code {
            font-family: Consolas, Monaco, monospace;
        }
        ul li {
            margin-bottom: 10px;
            font-size: 14px ;
        }
        a {
            color: #0073aa;
        }
        a:hover,
        a:active {
            color: #00a0d2;
        }
        a:focus {
            color: #124964;
            -webkit-box-shadow:
                0 0 0 1px #5b9dd9,
                0 0 2px 1px rgba(30, 140, 190, .8);
            box-shadow:
                0 0 0 1px #5b9dd9,
                0 0 2px 1px rgba(30, 140, 190, .8);
            outline: none;
        }
        .button {
            background: #f7f7f7;
            border: 1px solid #ccc;
            color: #555;
            display: inline-block;
            text-decoration: none;
            font-size: 13px;
            line-height: 26px;
            height: 28px;
            margin: 0;
            padding: 0 10px 1px;
            cursor: pointer;
            -webkit-border-radius: 3px;
            -webkit-appearance: none;
            border-radius: 3px;
            white-space: nowrap;
            -webkit-box-sizing: border-box;
            -moz-box-sizing:    border-box;
            box-sizing:         border-box;

            -webkit-box-shadow: 0 1px 0 #ccc;
            box-shadow: 0 1px 0 #ccc;
            vertical-align: top;
        }

        .button.button-large {
            height: 30px;
            line-height: 28px;
            padding: 0 12px 2px;
        }

        .button:hover,
        .button:focus {
            background: #fafafa;
            border-color: #999;
            color: #23282d;
        }

        .button:focus  {
            border-color: #5b9dd9;
            -webkit-box-shadow: 0 0 3px rgba( 0, 115, 170, .8 );
            box-shadow: 0 0 3px rgba( 0, 115, 170, .8 );
            outline: none;
        }

        .button:active {
            background: #eee;
            border-color: #999;
            -webkit-box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 );
            box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 );
            -webkit-transform: translateY(1px);
            -ms-transform: translateY(1px);
            transform: translateY(1px);
        }

            </style>

[ghost]

Got it. It's a browser default styles. I was looking in DB and plugin files.