fronend/scss/pages/_404.scss

.four-zero-four {
    width: 100%;
    text-align: center;
    margin: 5% auto;

    .four-zero-four-container {
        .error-code {
            font-size: 160px;
        }

        .error-message {
            font-size: 26px;
            color: #333;
            font-weight: bold;
            margin-top: -40px;
        }

        .button-place {
            margin-top: 32px;
        }
    }
}