By default, the "Not Authorized" page login form module is too wide. You can make it narrow and look much better like this:

You can accomplish this by adding this custom CSS in css_additional template:
Adjust the values according to your preferences.
You can accomplish this by adding this custom CSS in css_additional template:
Code:
.canvas-widget-list.section-0 > .h-center-horizontal-container > .h-center-horizontal { width: 425px; max-width: 100%; margin: 0 auto 20px; border: 1px solid #aaa; padding: 20px; border-radius: 5px; background: #EFF3F4; background: linear-gradient(to bottom,#FFFFFF,#EFF3F4); box-sizing: border-box; }
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