.icon-module-menu {
    background: url('icons/module-menu.png') no-repeat center center;
    background-size: 70% 70%;
}

.euler-formula-brand-200-20 {
    height: 20px;
    width:200px;
    margin-top:15px;
    margin-bottom:15px;
    background-image:url(icons/Euler-Formula-800_200-1d1d1d.png);
    background-repeat:no-repeat;
    background-size:contain;
    display:inline-block;
}

.demo-brand-200-20 {
    height: 20px;
    width:200px;
    margin-top:15px;
    margin-bottom:15px;
    background-image:url(icons/logo_160X40.png);
    background-repeat:no-repeat;
    background-size:contain;
    display:inline-block;
}

.euler-formula-200-50-fff {
    height: 50px;
    width:200px;
    margin-top:15px;
    margin-bottom:15px;
    background-image:url(icons/Euler-Formula-800_200-fff.png);
    background-repeat:no-repeat;
    background-size:contain;
    display:inline-block;
}

.demo-brand-200-50-fff {
    height: 50px;
    width:200px;
    margin-top:15px;
    margin-bottom:15px;
    background-image:url(icons/logo_800X200.png);
    background-repeat:no-repeat;
    background-size:contain;
    display:inline-block;
}
.demo-brand-400-100-fff {
    height: 100px;
    width:400px;
    margin-top:15px;
    margin-bottom:15px;
    background-image:url(icons/logo_800X200.png);
    background-repeat:no-repeat;
    background-size:contain;
    display:inline-block;
}