style.css

* {
  box-sizing: border-box;
}
[class*="col-"] {
  width: 100%;
}
[class*="col-"] {
  float: left;
  padding: 10px;
  border: 0px solid red;
}

@media only screen and (min-width: 300px) and (max-width:600px) {
  /* For phones: */
  .col-s-1 {width: 8.33%;}
  .col-s-3 {width: 25%;}
  .col-s-4 {width: 33.33%;}
  .col-s-5 {width: 41.66%;}
  .col-s-6 {width: 50%;}
  .col-s-9 {width: 75%;}
  .col-s-11 {width: 91.66%;}
  .col-s-12 {width: 100%;}
  .dummy{
    padding:0px;
  }
  body{
    font-size:14px;
  }
  .quizContainer #questionContainer #question{
    font-size:16px;
  }
  .hint-btn, .submit-btn,.next-btn,.start-btn,.skip-btn,.more-btn,.less-btn{
    font-size:14px;
    font-family: 'Open Sans','Helvetica Neue',Helvetica,Arial,sans-serif;
  }
}
@media only screen and (min-width: 601px) and (max-width:1024px){
  /* For tablets: */
  .col-m-1 {width: 8.33%;}
  .col-m-2 {width: 16.66%;}
  .col-m-3 {width: 25%;}
  .col-m-4 {width: 33.33%;}
  .col-m-5 {width: 41.66%;}
  .col-m-6 {width: 50%;}
  .col-m-7 {width: 58.33%;}
  .col-m-8 {width: 66.66%;}
  .col-m-9 {width: 75%;}
  .col-m-10 {width: 83.33%;}
  .col-m-11 {width: 91.66%;}
  .col-m-12 {width: 100%;}
  body{
    font-size:18px;
  }
  .quizContainer #questionContainer #question{
    font-size:20px;
  }
  .hint-btn, .submit-btn,.next-btn,.start-btn,.skip-btn,.more-btn,.less-btn{
    font-size:18px;
    font-family: 'Open Sans','Helvetica Neue',Helvetica,Arial,sans-serif;
  }
}
@media only screen and (min-width: 1025px) {
  /* For desktop: */
  .col-1 {width: 8.33%;}
  .col-2 {width: 16.66%;}
  .col-3 {width: 25%;}
  .col-4 {width: 33.33%;}
  .col-5 {width: 41.66%;}
  .col-6 {width: 50%;}
  .col-7 {width: 58.33%;}
  .col-8 {width: 66.66%;}
  .col-9 {width: 75%;}
  .col-10 {width: 83.33%;}
  .col-11 {width: 91.66%;}
  .col-12 {width: 100%;}
  body{
    font-size:18px;
  }
  .quizContainer{
    max-width: 1024px;
    margin: auto;
  }
  #playlistContainer{
    max-width: 1024px;
    margin: auto;
  }
  .quizContainer #questionContainer #question{
    font-size:20px;
    max-width: 1024px;
  }
  .hint-btn, .submit-btn,.next-btn,.start-btn,.playlist-btn,.skip-btn,.more-btn,.less-btn{
    font-size:18px;
    font-family: 'Open Sans','Helvetica Neue',Helvetica,Arial,sans-serif;
  }
}

.row::after {
  content: "";
  clear: both;
  display: block;
}
body{
  background-color:#2d2f31;;
  font-family:'Lato', sans-serif;
  /*font-family: 'Open Sans','Helvetica Neue',Helvetica,Arial,sans-serif;*/
  margin:0px;
}

input[type=radio]{
  margin-top: -1px;
  vertical-align: middle;
}
input[type=checkbox]{
  margin-top: 1px;
  vertical-align: middle;
}

#introContainer{
  /*background-color: #27272b;*/
  background-color: #1d1f21;
  background-color: #FAFAFA;
  padding: 5px 5px 5px 5px;
  border-radius: 0px;
  border: 0px solid gray;
  float:none;
  margin: 0 auto;
}
#introContainer #title h2{
      background-color:#2d2f31;
      background-color: #FAFAFA;
      padding:5px 5px 5px 5px;
      border-radius: 10px;
      border:0px solid black;
      float:none;
      color:#c5c8c6;
      /*box-shadow: 0 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
      color:black;
}
#introContainer #introBox{
      background-color:#2d2f31;
      background-color: #FAFAFA;
      padding: 10px 10px 10px 10px;
      border-radius: 10px;
      border: 1px solid #EAEAEA;
      margin: 2px;
      color:#c5c8c6;
      color:black;
      display: flex;
      align-items: stretch;
      flex-wrap: wrap;
      /*box-shadow: 0 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
}
#introContainer #startButtonContainer{
    float:none;
    margin: 0 auto;
    background-color: #2d2f31;
    background-color: #FAFAFA;
    padding: 10px 10px 10px 10px;
    border-radius: 10px;
    border: 1px solid #EAEAEA;
    color:#c5c8c6;
    color:black;
    margin: 2px 2px 2px 2px;
    display: flex;
    /*box-shadow: 0 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
  }
#quizContainer{
  background-color: white;
  padding: 5px 5px 5px 5px;
  border-radius: 0px;
  border: 0px solid lightyellow;
  /*box-shadow: 0px 10px 5px -5px #1d1f21;
  /*box-shadow: 0 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
  /*float:none;
  margin: 0 auto;*/
  }
  #playlistContainer{
  background-color:white;
  padding: 5px 5px 5px 5px;
  border-radius: 0px solid #EAEAEA;
  }
  #playlistContainer #playlistHeading h2{
    background-color:#FAFAFA;
    padding:5px 5px 5px 5px;
    border-radius: 10px;
    border:1px solid #EAEAEA;
    color:black;
  }
  #playlistContainer #playlistContents #playlist{
    background-color:white;
    padding:5px 5px 5px 5px;
    border-radius: 10px;
    border:0px solid #EAEAEA;
    color:black;
    text-align: left;
    display: flex;
    flex-wrap:wrap;
    align-items: flex-start;
    /*align-items: stretch;
    flex-wrap: wrap;*/
    }
  /*#playlistContainer #playlistContents #playlist .contentdiv{
    background-color:inherit;
    padding:10px;
    border-radius: 0px;
    border:0px solid black;
    color:inherit;
    text-align: justify;
    margin:0 auto;
  }*/

  #contentContainer{
  background-color:#3d3f41;
  padding: 5px 5px 5px 5px;
  border-radius: 0px;
  }
  #contentContainer #contentHeading h2{
    background-color:#99CC99;
    padding:5px 5px 5px 5px;
    border-radius: 10px;
    border:2px solid black;
    color:black;;
  }
  #contentContainer #contents{
    background-color:#99CC99;
    padding:5px 5px 5px 5px;
    border-radius: 10px;
    border:2px solid black;
    color:black;
    text-align: left;
  }
  .playlist-btn{
    text-align: left;
  }
  #page{
    display:flex;
    align-items: stretch;
    flex-wrap: wrap;
  }
#quizContainer #title h2{
    background-color:#FAFAFA;
    padding:5px 5px 5px 5px;
    border-radius: 10px;
    border:1px solid #EAEAEA;
    color:black;
    /*box-shadow: 0px 10px 5px -5px #1d1f21;
    /*box-shadow: 1px 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
  }
#quizContainer #questionContainer{
  background-color: inherit;
  padding: 5px 5px 5px 5px;
  border-radius: 10px;
  border: 0px solid #EAEAEA;
  color:#c5c8c6;

  }
#quizContainer #questionContainer #questionBox{
  background-color:#FAFAFA;
  padding: 10px 10px 10px 10px;
  border-radius: 10px;
  border: 1px solid #EAEAEA;
  margin: 2px;
  color:black;
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
  /*box-shadow: 1px 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/

}
#quizContainer #questionContainer #questionBox #questionImage {
  background-color: inherit;;
  text-align: center;
  float:none;
  margin: 0 auto;

}
#quizContainer #questionContainer #answerOptionBox{
  background-color:#FAFAFA;
  padding: 10px 10px 10px 10px;
  border-radius: 10px;
  border: 1px solid #EAEAEA;
  margin: 2px;
  color:black;
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
  /*box-shadow: 0px 10px 5px -5px #1d1f21;
  /*box-shadow: 1px 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
}

#playlistContainer #playlistContents{
  background-color: white;
  padding: 5px 5px 5px 5px;
  border-radius: 10px;
  border: 0px solid #EAEAEA;
  color:#c5c8c6;
}
/*#playlistContainer #playlistContents #playlistBox{
  background-color:#2d2f31;
  padding: 10px 10px 10px 10px;
  border-radius: 10px;
  border: 2px solid black;
  margin: 2px;
  color:#c5c8c6;
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
}
#playlistContainer #playlistContents #playlistBox div{
  display: block;
}*/
#quizContainer #questionContainer #buttonBox{
  background-color:#FAFAFA;
  padding: 10px 10px 10px 10px;
  border-radius: 10px;
  border: 1px solid #EAEAEA;
  margin: 2px;
  color:black;
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
    /*box-shadow: 0 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
}
#quizContainer #questionContainer #answerOptions{
  background-color: #FAFAFA;
  padding:0px 0px 0px 0px;
  border-radius: 0px;
  border: 0px solid #EAEAEA;
  margin:2px;
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
  text-align: center;
  color:black;

}
#quizContainer #questionContainer #answerOptions div{
  padding: 10px 10px 10px 10px;
  text-align: center;
  border-radius: 10px;
  border: 0px solid red;
  margin:0px;
}
#quizContainer #questionContainer #hintBox {
  margin: 2px 2px 2px 2px;
  background-color:#FAFAFA;
  padding: 10px 10px 10px 10px;
  border-radius: 10px;
  border: 1px solid #EAEAEA;
  color:black;
  /*box-shadow: 0 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
}
#quizContainer #questionContainer #buttonBox{
  display: flex;
  padding: 0;
}

#quizContainer #questionContainer #buttonBox .button{
  float:none;
  margin:auto;
}
#nextButtonContainer .button{
  padding:0;
}
#quizContainer #feedbackContainer{
  margin: 2px 2px 2px 2px;
  padding: 10px 10px 10px 10px;
  border-radius: 10px;
  border: 1px solid #EAEAEA;
  color:#c5c8c6;
  color:black;
  background-color:#2d2f31;
  background-color: #FAFAFA;
  /*box-shadow: 0 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
  }
  #quizContainer #furthertopicsContainer{
    margin: 2px 2px 2px 2px;
    padding: 10px 10px 10px 10px;
    border-radius: 10px;
    border: 1px solid #EAEAEA;
    color:#c5c8c6;
    color:black;
    background-color:#2d2f31;
    background-color: #FAFAFA;
    display: flex;
    align-items: stretch;
    flex-wrap: wrap;
    
    }
  #quizContainer #feedbackContainer #correct{
    color:#99CC99;
    color:#20AA76;
    /*saved color:nice blue:#96CBFE*/
    background-color:#2d2f31;
    background-color: #FAFAFA;
    /*border-radius: 10px;
      /*box-shadow: 0 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
        padding: 10px 10px 10px 10px;
            margin: 2px 2px 2px 2px;*/
    }
    #quizContainer #feedbackContainer #incorrect{

      color:#E9C062;
      color:#F9EE98;
      color:#CC6666;
      /*color:#CC6666;good red color*/
      /*color:#DAD085;good mustard color
      color:#A8FF60;*/

      background-color:#2d2f31;
      background-color: #FAFAFA;
      /*border-radius: 10px;
      /*box-shadow: 0 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
        padding: 10px 10px 10px 10px;
            margin: 2px 2px 2px 2px;*/

      }
#quizContainer #nextButtonContainer{
    float:none;
    margin: 0 auto;
    background-color: #2d2f31;
    background-color: #FAFAFA;
    padding: 10px 10px 10px 10px;
    border-radius: 10px;
    border: 1px solid #EAEAEA;
    color:#c5c8c6;
    color:black;
    margin: 2px 2px 2px 2px;
    display: flex;
  }
#quizContainer #nextButtonContainer .button{
    float:none;
    margin: 0 auto;

  }
#quizContainer #resultContainer{
  background-color:#2d2f31;
  background-color:#FAFAFA;

  padding: 10px 10px 10px 10px;
  border-radius: 10px;
  border: 2px solid black;
  margin: 2px;
  color:#c5c8c6;
  color:black;
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
}
#quizContainer .image{
  max-width:100%;
}
#playlistContainer #playlist .flip-container .flipper .contentdiv .image-box .image{
  display:block;
  text-align:center;
  margin: 0 auto;
  max-width: 100%;
  max-height: 100%;
}
#playlistContainer #playlist .flip-container .flipper .contentdiv .image-box{


  text-align: center;
}
#playlistContainer #playlist .flip-container .flipper .contentdiv .text-box{

  float:left;
}

.hint-btn, .submit-btn,.next-btn,.start-btn,.skip-btn,.more-btn,.less-btn{
  width:100%;
  margin: 2px 2px 2px 2px;
  background-color:#99CC99;
  padding: 10px 10px 10px 10px;
  border-radius: 10px;
  border: 1px solid #EAEAEA;
}
/*.pin-btn,.playlist-btn{
  margin: 2px 2px 2px 2px;
  background-color:#99CC99;
  padding: 0px;
  border-radius: 10px;
  border: 2px solid black;
}*/
.pin-btn{
    background-color:#CC6666;
    padding: 5px 5px 5px 5px;
    margin: 0;
}
.submit-btn{
  background-color:#99CC99;

    /*box-shadow: 0 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
    border: 1px solid #EAEAEA;
}
.hint-btn{
  background-color:#96CBFE;

    /*box-shadow: 0 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
    border: 1px solid #EAEAEA;
}
.next-btn{
  background-color:#96CBFE;
}
.skip-btn{
  background-color:#CC6666;
  background-color:#DD6666;

    /*box-shadow: 0 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
    border: 1px solid #EAEAEA;

}
.more-btn{
  background-color:#99CC99;;
}
.less-btn{
  background-color:#CC6666;;
}
.hint-btn:hover{
  background-color:#62B1FE;


}
.submit-btn:hover{
  background-color:#62B1FE;
  background-color: mediumaquamarine;

}
.next-btn:hover{
  background-color:#62B1FE;

}
.start-btn:hover{
  background-color:mediumaquamarine;

}
.skip-btn:hover{
  background-color:#62B1FE;
  background-color:#DD6666;
  background-color: #cc6666;


}

.hint-btn:focus, .submit-btn:focus,.next-btn:focus,.start-btn:focus,.playlist-btn:focus,.pin-btn,.skip-btn,.more-btn,.less-btn{
  outline: 0;
}
.next-btn{
  margin:0;
}

.pin-btn{

}
#outerContainer{
  background-color: inherit;
  padding: 5px 5px 5px 5px;
  border-radius: 10px;
  border: 0px solid #EAEAEA;
  color:#c5c8c6;
  }
#imageCreditsContainer{
  background-color: #2d2f31;
  background-color: #FAFAFA;
  padding: 10px 10px 10px 10px;
  margin: 2px;
  border-radius: 10px;
  border: 1px solid #EAEAEA;
  color:#c5c8c6;
  color:black;
  display:flex;
  float:none;
  align-items: stretch;
  flex-wrap: wrap;
  /*box-shadow: 0 1px 5px rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/

  }
  #imageCreditsContainer title{
    float: none;
    margin: 0 auto;
  }
  #imageCreditsContainer #creditsContainer{
    float:none;
    margin: 0 auto;
  }
#question div{
    margin:0 auto;
    float:none;
    display: flex;
  }
  /* unvisited link */
  a:link {
      color: #99CC99;
  }

  /* visited link */
  a:visited {

      color:#E9C062;
  }

  /* mouse over link */
  a:hover {
      color: #F9EE98;
  }

  /* selected link */
  a:active {
      color: blue;
  }
  /* entire container, keeps perspective */
 .flip-container {
  	perspective: 1000px;

    min-height: 120px;
    background-color: #FAFAFA;
    padding: 10px;
    border-radius: 10px;
    border: 1px solid #EAEAEA;


    }
 .flip-container .flipper{

    }

  	/* flip the pane when hovered */
  	 .flip-container:hover .flipper, .flip-container.hover .flipper {
  		transform: rotateY(180deg);
      height:400px;


  	}
    .flip-container:hover{
      height:400px;
        overflow-y:auto;

    }
.front, .back{
  backface-visibility: hidden;
  top:0;
  left:0;
  position: absolute;
  max-height:100%;
  text-align: center;
  display: flex;
}
.front p{
  text-align:left;
  padding: 5px;
  margin-top: 0;
  padding-top: 0;
}
 .back{
  transform: rotateY(180deg);
  text-align: justify;
}
  .flipper {
	transition: 0.6s;
	transform-style: preserve-3d;
	position: relative;

  min-height: 120px;
  }
.flip-container{
  position: relative;

}
#playlistContainer #playlistContents #playlist{
  position: relative;
  text-align: justify;
}
.popup {
    position: relative;
    display: inline-block;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* The actual popup */
.popup .popuptext {
    visibility: hidden;
    width:300px;
    background-color: #555;
    color: #fff;
    text-align: justify;
    border-radius: 6px;
    padding: 8px 0;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left:50%;
    margin-left: 0px;
}

/* Popup arrow */
.popup .popuptext::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: #555 transparent transparent transparent;
}

/* Toggle this class - hide and show the popup */
.popup .show {
    visibility: visible;
    -webkit-animation: fadeIn 1s;
    animation: fadeIn 1s;
}

/* Add animation (fade in the popup) */
@-webkit-keyframes fadeIn {
    from {opacity: 0;}
    to {opacity: 1;}
}

@keyframes fadeIn {
    from {opacity: 0;}
    to {opacity:1 ;}
}
.contentdiv{
  display: flex;
}
#quizContainer,#answerOptionBox, #introContainer, #furthertopicsContainer,#buttonBox{
  background-color: white;
  color:black;
  /*box-shadow: 0 1px 0 rgba(0,0,0,.2), 0 2px 2px rgba(0,0,0,.15);*/
}
body{
  background-color: white;
}
.fa{
  float: right;
  vertical-align:text-bottom;
}