div#main {
background: rgba(255,255,255,.8);
padding: 1em;
}
To add CSS: use the “Additional CSS” option in the customizer. https://codex.www.ads-software.com/CSS#Custom_CSS_in_WordPress
Learn to use the Chrome Developer Tools to help you see and test changes to your CSS.
I recommend asking at https://www.ads-software.com/support/theme/satisfy#new-post so the plugin’s / theme’s developers and support community can help you with this.
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