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CSS

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HTML 

              
                <!DOCTYPE html>
<html lang="en" >
<head>
  <meta charset="UTF-8">
  <title>Scrollable Main Menu</title>
  <link rel="stylesheet" href="./topmenu.css">
 
   <script src="topmenu.js"></script>
</head>

<body onload="blinkingfrontdesk();">


<div class='topcontainer' id='topcontainer'>

    <div class="topmenu" id='topmenu' style="display: grid;">
        <div onclick="location.href=''"><a href=''>Dashboard</a></div>
        <div onclick='showmenuscreen(this.id);' id="primary">Primary</div>
        <div onclick='showmenuscreen(this.id);' id="frontdesk">Front Desk</div>
        <div onclick='showmenuscreen(this.id);' id="main">Main</div>
        <div><a href=''>Logout</a></div>
    </div>
</div>

<div class="topmenubtnup" id="topmenubtn" onclick='topmenubtn();'><span class="menubtnarrow">&#8250;&#8250;</span></div>



<div class='menuscreen' id='menuscreen'>

    <div class='closemenu' id='closemenu' onclick='hidemenuscreen();'>X</div>


    <div class="scrollcontent" id="primarymenu">

        <div class="gridhdr">Primary</div>
        <div class="grid">
            <div onclick="location.href=''"><a href=''>Primary 1</a></div>
            <div>Primary 2</div>
            <div><a href=''>Primary Web Development</a></div>
            <div>Primary 4</div>
            <div>Primary 5</div>
            <div>Primary 6</div>
            <div>Primary 7</div>
            <div>Primary 8</div>
            <div onclick="location.href=''"><a href=''>Primary Development</a></div>
        </div>

        <br />
    </div>


    <div class="scrollcontent" id="frontdeskmenu">

        <div class="gridhdr">Front Desk</div>
        <div class="grid">
            <div onclick="location.href=''" style="background-color:#C00000;border: solid 1px #C00000;border-radius: 10px;">Messages</div>
            <div>Logs</div>
            <div><a href=''>Site Settings</a></div>
            <div>FD 4</div>
            <div>FD 5</div>
            <div>FD 6</div>
            <div>FD 7</div>
            <div>FD 8</div>
        </div>

        <br />
    </div>
    
    
    <div class="scrollcontent" id="mainmenu">

        <div class="gridhdr">Tasks</div>
        <div class="grid">
            <div onclick="location.href=''"><a href=''>Web Application Development</a></div>
            <div><a href=''>Software as a Service (SaaS) Systems</a></div>
            <div><a href=''>Custom Software</a></div>
            <div><a href=''>AWS Cloud Systems Design</a></div>
            <div><a href=''>Startup Development and Design</a></div>
            <div>Item 7</div>
            <div>Item 8</div>
            <div onclick="location.href=''"><a href=''>Web Application Development</a></div>
        </div>
    


        <div class="gridhdr">Maintenance Tasks</div>
        <div class="grid">
            <div>Item 1</div>
            <div>Item 2</div>
            <div><a href=''>Software as a Service (SaaS) Systems</a></div>
            <div>Item 4</div>
            <div>Item 5</div>
            <div>Item 6</div>
            <div>Item 7</div>
            <div>Item 8</div>
            <div onclick="location.href=''"><a href=''>Web Application Development</a></div>
        </div>


        <div class="gridhdr">Recurring Tasks</div>
        <div class="grid">
            <div>Item 1</div>
            <div>Item 2</div>
            <div><a href=''>Software as a Service (SaaS) Systems</a></div>
            <div>Item 4</div>
            <div>Item 5</div>
            <div>Item 6</div>
            <div>Item 7</div>
            <div>Item 8</div>
            <div onclick="location.href=''"><a href=''>Web Application Development</a></div>
        </div>


        <div class="gridhdr">Employees</div>
        <div class="grid">
            <div>Item 1</div>
            <div>Item 2</div>
            <div><a href=''>Software as a Service (SaaS) Systems</a></div>
            <div>Item 4</div>
            <div>Item 5</div>
            <div>Item 6</div>
            <div>Item 7</div>
            <div>Item 8</div>
            <div onclick="location.href=''"><a href=''>Web Application Development</a></div>
        </div>

        <div class="gridhdr">Inspections</div>
        <div class="grid">
            <div>Item 1</div>
            <div>Item 2</div>
            <div><a href=''>Software as a Service (SaaS) Systems</a></div>
            <div>Item 4</div>
            <div>Item 5</div>
            <div>Item 6</div>
            <div>Item 7</div>
            <div>Item 8</div>
            <div onclick="location.href=''"><a href=''>Web Application Development</a></div>
        </div>



        <div class="gridhdr">Reports</div>
        <div class="grid">
            <div onclick="location.href=''"><a href=''>Web Application Development</a></div>
            <div><a href=''>Software as a Service (SaaS) Systems</a></div>
            <div><a href=''>Custom Software</a></div>
            <div><a href=''>AWS Cloud Systems Design</a></div>
            <div><a href=''>Startup Development and Design</a></div>
            <div>Item 6</div>
            <div>Item 7</div>
            <div>Item 8</div>
            <div>Item 9</div>
            <div>Item 10</div>
            <div>Item 11</div>
            <div>Item 12</div>
            <div>Item 13</div>
            <div>Item 14</div>
            <div>Item 15</div>
            <div>Item 16</div>
            <div>Item 17</div>
            <div>Item 18</div>
            <div>Item 19</div>
            <div>Item 20</div>
        </div>



        <div class="gridhdr">Help Menu</div>
        <div class="grid">
            <div onclick="location.href='https://www.c3solutionware.com/webappdev.aspx'"><a href='https://www.c3solutionware.com/webappdev.aspx'>Web Application Development</a></div>
            <div onclick="location.href='https://www.c3solutionware.com/cloudsaasdev.aspx'"><a href='https://www.c3solutionware.com/cloudsaasdev.aspx'>Software as a Service (SaaS) Systems</a></div>
            <div onclick="location.href='https://www.c3solutionware.com/customsoftware.aspx'"><a href='https://www.c3solutionware.com/customsoftware.aspx'>Custom Software</a></div>
            <div onclick="location.href='https://www.c3solutionware.com/cloudappdev.aspx'"><a href='https://www.c3solutionware.com/cloudappdev.aspx'>AWS Cloud Systems Design</a></div>
            <div onclick="location.href='https://www.c3solutionware.com/startupdev.aspx'"><a href='https://www.c3solutionware.com/startupdev.aspx'>Startup Development and Design</a></div>
            <div onclick="location.href='https://www.c3solutionware.com/about.aspx'"><a href='https://www.c3solutionware.com/about.aspx'>About Us</a></div>
        </div>

        <br />
    </div>
    
</div>



<h1>Scrollable Full Screen Grid Style Main Menu</h1>

<p>Simple full screen scrollable menu that easily modified and translated dynamically 
based on the users credentials and preferences for larger SaaS systems. 
Easy to use & learn, minimal clicks, and maximizing screen real estate.
Live systems red icons will blink and then sound audible alarm warnings if not resolved within
a certain time.
</p>





<h2>This is just filler material</h2>
<p></p>



<h1>Web Application Development</h1>
<p>Our custom mobile and desktop web applications have a proven record of being highly reliable, scalable, and consistently 
    exceeding our customers and business partners expectations.
    Whether you are a start-up with the next great product idea 
    or a Fortune 500 company that needs to modernize. 
    We have the technical knowledge and experience necessary to quickly turn your vision into reality and
    our modular development process allows us to meet any future business and technology needs.
    Our innovative web applications are easy to use, easy to maintain, cost effective, and customized to your business.
</p>


    <p>With over 25 years of experience developing quality results driven Web Applications, AWS Cloud Systems, and SaaS Custom Software Solutions
	from concept to implementation to the enhancement and integration of legacy 
	systems. Our innovative custom web applications development solutions have led to significant increases in 
	quality, productivity, and efficiency for both small and large customers spanning numerous 
	industries, including: Hospitality, Service, Sales &amp; Marketing, Accounting, Insurance, Financial, 
	Chemical &amp; Industrial, and Manufacturing.
	</p>

    
<p>We stay current with the latest Cloud technologies, industry 
	standards, security, and best software development practices.</p>

        
<h1>Footer</h1>
       
<p>We are a Full Stack Results Driven Web Applications, AWS Cloud Systems, and SaaS Custom Software Solutions Development company located in Austin, Texas. 
        We specialize in creating Cost-Effective Quality Custom Web Apps, AWS Cloud Systems, and SaaS Software Solutions Development 
        with over 25 years of Expertise building business critical applications of any size and scope from concept to 
        live 24/7 production systems that have proven to be both reliable and scalable.
</p>

    <table width="100%" cellspacing='10px'>
    
    <tr>
        <td style='vertical-align:top'>
            <h4>Company</h4>
        </td>
        <td style='vertical-align:top'>
            <h4>Our Services</h4>
        </td>
    </tr>

    <tr>
        <td style='vertical-align:top'>
            <span style='white-space: nowrap;'><a href='' title='Call or Text Us 24/7' target="_blank">Available 24/7</a></span>
        </td>
        <td style='vertical-align:top'>
            <a href='https://www.c3solutionware.com/webappdev.aspx' title='Results Driven Web Application Development - C3Solutionware Austin' target="_blank">Web Application Development</a>
        </td>
     </tr>   

    <tr>
        <td style='vertical-align:top'>
            <a href='https://www.c3solutionware.com/softwaresolutionrequest.aspx' rel='nofollow' title='Call, Text, or Contact us in Austin - C3Solutionware.com' target="_blank">Contact Us</a>
        </td>
        <td style='vertical-align:top'>
            <a href='https://www.c3solutionware.com/cloudsaasdev.aspx' title='Expert SaaS Systems Development - C3Solutionware Austin' target="_blank">SaaS Systems Development</a>
        </td>
     </tr>
     
    
    <tr>        
        <td style='vertical-align:top'>
            <a href='https://www.c3solutionware.com/about.aspx' title='About Us C3Solutionware Austin - Web Applications, AWS Cloud, and SaaS Custom Software Development' target="_blank">About Us</a>
        </td>
        <td style='vertical-align:top'>
            <a href='https://www.c3solutionware.com/customsoftware.aspx' title='Quality Custom Software Development - C3Solutionware Austin' target="_blank">Custom Software</a>
        </td>   
     </tr>
          
        
    <tr>
        <td style='vertical-align:top'>
            <a href='https://www.c3solutionware.com/sitemap.aspx' title='Austin Web App Development Company' target="_blank">Site Map</a>
        </td>
        <td style='vertical-align:top'>
            <a href='https://www.c3solutionware.com/cloudappdev.aspx' title='AWS Cloud Systems - C3Solutionware Austin' target="_blank">AWS Cloud Systems</a>
        </td>        
      </tr>
        
      
    <tr>
        <td style='vertical-align:top'>
            <a href='https://www.c3solutionware.com/privacypolicy.aspx' target="_blank">Privacy Policy</a>
        </td>
        <td style='vertical-align:top'>
            <a href='https://www.c3solutionware.com/startupdev.aspx' title='Startup Development - C3Solutionware Austin' target="_blank">Startup Development</a>
        </td>        
    </tr>
    
  
</table>  
<br />
  
  <div class="sitelink">
    <a href="https://www.c3solutionware.com" title="Web Applications and SaaS Systems Development - C3Solutionware Austin Tx" target="_blank">
    <img alt='Austin Web App Development Company C3Solutionware' src='https://www.c3solutionware.com/images/C3Solutionware_Logo4.jpg' width='15%'/>    
    </a>
</div>
  
</body>
</html>
!

CSS 

              
                html { font-size: 18px; }

body {
  color: black;
  font-size: 1.2em;
  line-height: 1.6;
  background-color: #F5F5F5;
  
  overflow-x: hidden;
  padding-left: 25px;
}

.topcontainer {
  position: fixed;
  left: 5px;
  top: 0px;
  z-index: 990;
  padding: 8px 0px 8px 0px;
  width:98.5%;
  border: solid 2px #F5F5F5;
  border-radius: 20px;
  display: flex;
  justify-content: center;
  background-color: rgba(0,77,165,.65);
  border-radius: 20px;
  backdrop-filter: blur(15px);
  height: 40px;
  transition: all 0.50s ease-in-out;
}


.topmenubtnup {
  position: fixed;
  right: 15px;
  top: 3px; 
  background-color: rgba(255,255,255,.10);
  color:#FFF;
  z-index: 991;
  -webkit-transform: rotate(270deg);
  transform: rotate(270deg);
  padding: 4px 15px 8px 15px;
  border-radius: 45px;
  font-size: 24px;  
  transition: all 0.50s ease-out;
}


 
.topmenubtnup:hover {
    cursor:pointer;
    font-size: 30px; 
    font-weight: bold;
}


.topmenubtndown {
  position: fixed;
  right: 15px;
  top: 17px; 
  background-color: rgba(0,77,165,.65);
  color:#FFF;
  z-index: 991;
  -webkit-transform: rotate(90deg);
  transform: rotate(90deg);
  padding: 4px 15px 8px 15px;
  border-radius: 45px;
  font-size: 24px;  
  transition: all 0.50s ease-out;
  backdrop-filter: blur(15px);    
}


 
.topmenubtndown:hover {
    cursor:pointer;
    font-size: 30px; 
    font-weight: bold;
}


.topmenu {
  border: solid 5px transparent;
  padding: 0px 0px 0px 10px;       
  display: grid;
  grid-gap: 10px;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));    
  grid-template-columns: 100px 100px 100px 100px 100px;
  transition: all 0.50s  ease-in-out;  
   
}

.topmenu>* {
  height: 30px;    
  color:#FFF;
  font-weight:normal;
  font-size: 18px;    
  text-align: center;
  vertical-align: middle;
}


.topmenu div {
    border-radius: 15px;
    cursor:pointer;
    background-color: rgba(255,255,255,.10);
}

.topmenu div:hover {
    cursor:pointer;
    margin-top: -7px;
    font-size: 21px; 
    background-color: rgba(255,255,255,.25);   
    
    box-shadow: 0 0 5px rgba(255,255,255,.50),
                0 0 25px rgba(255,255,255,.50),
                0 0 50px rgba(255,255,255,.50),
                0 0 200px rgba(255,255,255,.50);
    
     -webkit-box-reflect:below 1px linear-gradient(transparent, #0005);
    
    
    
}

.topmenu div a, a.text {
    text-decoration: none;
	color:#FFF;
}





.menuscreen {
    font-size: 100%;
    font-weight:  normal;
    text-align:left;
    top: 0px;
    right: 1px;
    width:0%;
    position:fixed;
    visibility:hidden;
    z-index: 995;
    height: 100%;
    background-color: rgba(0,77,165,.65);
    border-radius: 20px;
    backdrop-filter: blur(15px);
    transition: all 0.50s ease-out;
}


.scrollcontent
{
    height: 100%;
    width:  100%;
    overflow-y: auto;
}


.gridhdr {
    font-size: 25px;
    font-weight: bolder;
    color:#FFF;
    padding: 40px 0px 0px 30px;    
}



.grid {
  padding: 0px 20px 0px 40px;       
  display: grid;
  grid-gap: 0px;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
}

.grid>* {
  height: 60px;
  line-height: 20px;
  padding: 5px 5px 5px 5px;
  color:#FFF;
  font-weight:normal;
  font-size: 20px;    
}


.grid div:hover {
    font-size: 24px;     
    font-weight: bolder;
    cursor:pointer;
    overflow-y: hidden;
    overflow-x: hidden;
    margin-top: -7px;
}

.grid div a, a.text {
    text-decoration: none;
	color:#FFF;
	width:100%;
}


.closemenu {
    font-size: 26px;
    color: #FFFFFF;
    font-weight:bold;
    position: fixed;
    top: 0px;
    right: 20px;

    width:20px;
    padding: 5px 15px 5px 15px;
    display:block;
}

.closemenu:hover {
	cursor:pointer;
    font-size: 29px;    
    font-weight:bolder;
    background-color: rgba(255,255,255,.25);
    border-radius: 30px;
}



h1 {
  padding-top:50px
}



.sitelink a, a.text {
    text-decoration: none;
}

.sitelink a:hover {
    text-decoration: none;

}
!

JS 

              
                vtext = 0;

function blinkingfrontdesk() {

    vtextVal = setInterval(function() {
                    if (vtext == 0) {
                        vtext = 1;
                        document.getElementById("frontdesk").style.backgroundColor="#C00000";
                    }
                    else
                    {
                        vtext = 0;
                        document.getElementById("frontdesk").style.backgroundColor="rgba(255,255,255,.10)";             
                     }
                }, 1000);
}

function hidemenuscreen() {
    document.getElementById("closemenu").style.display="none";
    document.getElementById("menuscreen").style.width = '0%';
    document.getElementById("menuscreen").style.visibility="none"; 
}

function showmenuscreen(menuId) {

    document.getElementById("mainmenu").style.display="none";
    document.getElementById("primarymenu").style.display="none";
    document.getElementById("frontdeskmenu").style.display="none";

    document.getElementById(menuId + "menu").style.display="block";

    document.getElementById("menuscreen").style.visibility="visible";  
    document.getElementById("menuscreen").style.width = '100%';
    document.getElementById("closemenu").style.display="block";
}


function topmenubtn() {
    if (document.getElementById("topmenu").style.display == "grid") {

        document.getElementById("topcontainer").style.height = "0px";
        document.getElementById("topmenubtn").className = "topmenubtndown";
        document.getElementById("topmenu").style.display = "none";        
    }
    else
    {
        document.getElementById("topmenu").style.display = "grid";
        document.getElementById("topcontainer").style.height = "40px";
        document.getElementById("topmenubtn").className = "topmenubtnup";
    }

}
!
999px

Console