.blinking{
    animation:blinkingText 1.2s infinite;
}
@keyframes blinkingText{
    0%{     color: #ff0000;    }
    49%{    color: #ff0000; }
    60%{    color: transparent; }
    99%{    color:transparent;  }
    100%{   color: #ff0000;    }
}

body {
  background: #000;
  color: #fff;
  font-size: 2em;
  font-family: calibri, sans-serif, Arial, Helvetica;
}

form {
  color: #fff;
  padding-left: 20px;
}

div[class^='div_'] {
	background: #000;
	display: none;
	border: none;
	border-style: none;
}

div[class^='topping_'] {
	background: #000;
	border: none;
	border-style: none;
}

.main { 
    background: #000;
    display: block; 
    position: relative; 
    padding-left: 45px; 
    margin-bottom: 10px; 
    cursor: pointer; 
	border: none;
    border-style: none;
} 
          
/* Hide the default checkbox */ 
input[type=checkbox] { 
    visibility: hidden; 
} 

/* Creating a custom checkbox 
based on demand */ 
.geekmark { 
    position: absolute; 
    top: 0; 
    left: 0; 
    height: 28px; 
    width: 28px; 
    background-color: white; 
}
/* Specify the background color to be 
shown when hovering over checkbox */ 
.main:hover input ~ .geekmark { 
    background-color: white; 
} 

/* Specify the background color to be 
shown when checkbox is active */ 
.main input:active ~ .geekmark { 
    background-color: red; 
} 

/* Specify the background color to be 
shown when checkbox is checked */ 
.main input:checked ~ .geekmark { 
    background-color: red; 
} 

/* Checkmark to be shown in checkbox */ 
/* It is not be shown when not checked */ 
.geekmark:after { 
    content: ""; 
    position: absolute; 
    display: none; 
} 

/* Display checkmark when checked */ 
.main input:checked ~ .geekmark:after { 
    display: block; 
} 

/* Styling the checkmark using webkit */ 
/* Rotated the rectangle by 45 degree and  
showing only two border to make it look 
like a tickmark */ 
.main .geekmark:after { 
    left: 8px; 
    bottom: 5px; 
    width: 8px; 
    height: 18px; 
    border: solid white; 
    border-width: 0 5px 5px 0; 
    -webkit-transform: rotate(45deg); 
    -ms-transform: rotate(45deg); 
    transform: rotate(45deg); 
} 

/* HIDE RADIO */
[type=radio] { 
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

/* IMAGE STYLES */
[type=radio] + img {
  cursor: pointer;
}

/* CHECKED STYLES */
[type=radio]:checked + img {
  outline: 2px solid #f00;
}