Redesign of PTO Calendar website

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This customer received 64 web designs from 14 designers. They chose this web design from nzdesigners as the winning design.
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Web Design Brief
Looking to drastically improve our PTO (paid time off) Calendar look and feel. Need a modern and well thought out design that is fun.
Current Screenshots
https://docs.google.com/document/d/1qXk8aCoD_HsRLULHfS5RtF0sln4sdQr9ieRO0HeWmMY/edit?usp=sharing
It's written in PHP and Laravel, if that matters. I am not necessarily attached to any of the current design, so please go wild. Current functionality needs to remain the same, but some can be added if you feel it would be of value. Layout can certainly change.
NOTE - this calendar can be used by any company, not just our own. So we'd like it to have a look and feel that is easy to navigate.
Site logo is attached.
Pages needed:
* Login Page
* Registration Page
* Calendar page
* Add PTO method
* Admin page (will use template for all admin areas)
* User profile page
Thanks!
Coding
Coded - Design and coding required
Number of Pages Required
5+ page
Look and feel
Each slider illustrates characteristics of the customer's brand and the style your logo design should communicate.