HolmesInc

register_activation_hook(__FILE__, 'activate_options');

add_options_page('RDolls Category Adder', 'RDolls Category Setting', 8, __FILE__, 'plugin_setting_page');

add_options_page('RDolls Category Adder', 'RDolls Category Setting', 'manage_options', __FILE__, 'plugin_setting_page');

.parent {
    position: relative;
    width: 200px;
    height: 300px;
    background: #000;
    margin: 0 auto;
}

.child {
    position: absolute;
    top: 50px; left: 50%;
    width: 100vw; margin-left: -50vw;
    height: 100px;
    background: #f00;
}