page.css

body{
    
    background-image: url("tech.png");
    background-repeat:  no-repeat;
    background-size: cover;
    color: #fff;
    /*overflow: hidden;
    padding-top:5px;
    padding-left: 10px;
    
    margin:0 auto;*/
}
ul{
    list-style: none;
    padding: 0px;
    margin:0px;
    
}
ul li{
    float:left;
    width:261px;
    height:40px;
    background-color: rgba(52, 73, 94, 0.3);
    text-align: center;
    line-height: 40px;
    font-size: 18px;
    font-family: arial;
    margin-right: 5px;
    cursor: pointer;
    z-index: 1000;
    position: relative;
}
ul li a{
    text-decoration: none;
    color: white;
    display: block;
    
}
ul li a:hover{
    background-color: #2ECC71;
}
ul li ul li{
    display: none;
    background-color: rgba(73, 73, 165, 0.51);
}
ul li:hover ul li{
    display:block;
}

.cont{
    width:80%;
    
    text-align: left;
    background-color: rgba(52, 73, 94, 0.7);
    border-radius:4px;
    margin:0 auto;
    padding-left: 15px;
    padding-top: 5px;
    padding-right: 10px;
    padding-bottom: 10px;
    margin-top:10px;
}
h3{
    color:#2ECC71;
}

.img{
    
    margin:0 auto;
    margin-top: 20px;
    margin-bottom: 20px;
    /*max-width: 100% !important;*/
    
}
.button{
    
    cursor: pointer;
    padding-left: 550px;
}
.greyButton{
    background-color: white;
    height:40px;
    width:80px;
    border:none;
    margin-bottom: 3px;
    cursor: pointer;
   
    
}
.greyButton:hover{
    background-color: grey;
}
.demoButton{
    
    background-color: white;
    border:none;
    cursor: pointer;
    
    height:40px;
    width:40px;
}
.demoButton:hover{
    background-color: rgba(126, 7, 7, 0.75);
}
#red1{
    margin-left:21px;
}

h1 {
    color: white;
    text-align: center;
}
#crack{
    color:white;
    text-decoration: none;
}
.head{
    text-align: center;
    background-color: rgba(52, 73, 94, 0.7);
    border-radius:4px;
       
    margin-bottom: 5px;
    padding-top: 15px;
    padding-bottom: 15px; 
}
#relog{
    width:10%;
    height:30px;
    background-color: #2ECC71;
    color: white;
    border-radius: 4px;
    margin-left: 1100px;
    cursor: pointer;
    display: block;
    text-decoration: none;
    padding-top: 5px;
}

tr td {
    padding:10px;
}