body {
    background: linear-gradient(to right, indigo, #ae41ff 15% 85%, indigo);
    font-family: "Trebuchet MS";
}
.navdiv {
    height: 80px;
    width: 99%;
    left: -1px;
    top: -1px;
    background-color: #59009b;
    position: fixed;
    display: flex;
    justify-content: space-evenly;
    border: 9px solid black;
}
.navbox {
    text-align: center;
    width: 40%;
    height: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin-top: 20px;
    background-color:#8700eb;
    
    transition: width 0.5s, height 0.5s, margin-top 0.5s;
}
.navbox:hover {
    width: 50%;
    height: 70%;
    margin-top: 12px;
}
.navlink {
    position:fixed;
    width:100%;
    height:10%;
    z-index: 3;
}

.bigblock {
    width: 95%;
    display: flex;
    margin: auto;
    margin-top: 120px;
    margin-bottom: 70px;
    background-color: #8700eb;
    border: 7px solid black;
    flex-direction: column;
}
.banner {
    background-color: #b07fd4;
    height: 70px;
    width: 50%;
    border: 5px solid black;
    margin: auto;
    margin-top: 20px;
    margin-bottom: 20px;
    text-align: center;
    padding-bottom: 5px;
}
.internalbigblock {
    width: 100%;
    display: flex;
    flex-direction: row;
}
.internalblock60 {
    width: 60%;
    
}
.internalblock60again {
    width: 60%;
    text-align: center;
    padding-right: 70px;
}
.internalblock40 {
    width: 40%;
    text-align: center;
    padding-right: 10px;
}

/* The CSS for the Sigma Motion optical illusion */
.bar {
    width: 100%;
    display: flex;
    margin: auto;
    margin-left: 0;
    text-align: center;
}
.sigmacontainer {
    height: 150px;
    background-color: white;
    width: 100%;
    margin: 10px;
    display: flex;
}

.sigmabox {
    height: 100%;
    width: 2%;
    background-color: black;
}
.white {
    background-color: white;
}
.inputbar {
    background-color: #eacffe;
    height: 30px;
    margin-left: 10px;
    margin-bottom: 10px;
    padding-top: 8px;
    padding-left: 8px;
    padding-right: 8px;
    margin-top: 7px;
}
.startbutton {
    background-color: #eacffe;
    height: 30px;
    width: 70px;
    margin-left: 10px;
    margin-bottom: 10px;
    padding-top: 8px;
    margin-top: 7px;
    transition: 0.5s;
}
.startbutton:hover{
    background-color: #b07fd4;
}
.stopbutton {
    background-color: #eacffe;
    height: 30px;
    width: 70px;
    margin-left: 10px;
    margin-bottom: 10px;
    padding-top: 8px;
    margin-top: 7px;
    transition: 0.5s;
}
.stopbutton:hover{
    background-color: #b07fd4;
}


/* The CSS for the Stepping Feet optical illusion */
#stepcanvas {
    width: 600px;
    height: 300px;
    border: 2px solid black;
    margin: auto;
    margin-left: 10px;
}
.feetstart {
    background-color: #eacffe;
    height: 30px;
    width: 70px;
    margin-left: 10px;
    margin-bottom: 10px;
    padding-top: 8px;
    margin-top: 7px;
    transition: 0.5s;
}
.feetstart:hover{
    background-color: #b07fd4;
}
.feetstop {
    background-color: #eacffe;
    height: 30px;
    width: 70px;
    margin-left: 10px;
    margin-bottom: 10px;
    padding-top: 8px;
    margin-top: 7px;
    transition: 0.5s;
}
.feetstop:hover{
    background-color: #b07fd4;
}
.feetcontrast {
    background-color: #eacffe;
    height: 30px;
    width: 140px;
    margin-left: 10px;
    margin-bottom: 10px;
    padding-top: 8px;
    margin-top: 7px;
    transition: 0.5s;
}
.feetcontrast:hover{
    background-color: #b07fd4;
}
.contrastclicked {
    background-color: #b07fd4;
}

.datediv {
    position: fixed;
}