* {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
    box-sizing: border-box;
}

.header{ /*Selextor*/
      /* Declaration */
    position: fixed;
    top: 0;
    visibility: show; /* Visibility = Property, Show is Value  */
    width: 100%;
    height: 90px;
    font-family: 'Open Sans', Arial, Helvetica, sans-serif;
    text-decoration: none;
    overflow: hidden;
    z-index: 999; 
    background-color: white;
    box-shadow: rgba(100, 100, 111, 0.2) 0px 7px 29px 0px;
}

.header img {
    visibility: show;
    height: 60px;
    float: left;
    margin-left: 25px;
    margin-top: 20px;
}

.header b {
    font-family: Arial, Helvetica, sans-serif;
    color:black;
    font-weight: bold;
    text-decoration: none;
    padding: 6px 7px;
    margin-top: 14px;
    float: left;
    font-size: 25pt;
}

.header a {
    font-family: sans-serif;
    color:black;
    font-weight: bold;
    text-decoration: none;
    font-size: 15pt;
    padding: 6px 11px;
    margin-top: 30px;
    float: right;
    margin-right: 35px;
}

.header a:hover {
    font-family: sans-serif;
    color: green;
    font-weight: bold;
    text-decoration: underline green 3px;
    margin-top: 30px;
    transition: all ease .5s;
    text-decoration: none;
}

.sub {
    float: right;
    width: 160px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    position: relative;
    display: block; 
}

.sub li a {
    display: block;
    width: 100%;
    height: 100%;
    text-decoration: none;
    color: black;
    border: 1px solid lightgrey;
}

.sub:hover {
    background-color: greenyellow;
    display: ;
}

.sub ul.sub {
    position: absolute;
    display: none;
}
.sub ul.sub li ul.sub {
    top:0;
    left: 160px;
}

.signin {
    background-color: rgb(143, 251, 143);
    box-shadow: 5px solid black;
    
}