style-menu.css

.noselect { 
  -webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none; /* Safari */
     -khtml-user-select: none; /* Konqueror HTML */
       -moz-user-select: none; /* Old versions of Firefox */
        -ms-user-select: none; /* Internet Explorer/Edge */
            user-select: none; /* Non-prefixed version, currently
                                  supported by Chrome, Edge, Opera and Firefox */
}

body {
  background-color: #000000;
}

img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  max-width: 40%;
  height: auto;
}

/* Positioning saves button on the left corner */
.box {
  padding-top: 5%;
  display: flex;  
  justify-content: center;  
  align-items: center;  
}
#box2 {
  padding-top: 1%;
  display: flex;  
  justify-content: center;  
  align-items: center;  
}
.buttonMenu {
  position: relative;
  bottom: 10;
  right: 0;
  background-color: #FFFFFF; /* black */
  border: none;
  color: black;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  border: 2px solid #000000;
  transition-duration: 0.4s;
  border-radius: 8px;
  text-align: center;
  line-height: 0;
}

.buttonMenu:hover {
  background-color: #e7e7e7; /* white */
  color: black;
}