* {
    padding: 0;
    margin: 0;
    box-sizing: border-box; 
}

/*canvas {position: fixed; top: 0; left: 0; z-index: 1; } 
content {position: relative; z-index: 2; }
*/

#loadOverlay{
    position: fixed;
    display: block;
    width: 100%;
    height: 100%;
    text-align: center;
    top: 0;
    left:0;
    right:0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.932);
    z-index: 2;
    
}

#overlayText{
    position: relative;
    top: 20%;
    color: white;
    display: inline-block;
    font-family: 'Roboto';
}

#h1{
    font-size: 70px;
}

#h2{
    font-family: 'Timmana';
    font-size: 80px;
}

#h2_text{
    font-family: 'Roboto';
    font-size: 25px;
    text-align: justify;
    position: absolute;
    left: 20%;
    right: 20%;

}

#h3{
    font-size: 20px;
    position: relative;
    top: 80%;
    bottom: 10%;      
}

#buttonIntro{
    position: relative;
    background-color: white;
    color: black;
    border: 5px solid black;
    font-family: 'Timmana';
    padding: 16px 16px 0px 16px;
    font-size: 45px;
    top: 20vh;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    border-radius: 10px;
    cursor: pointer;
}
 
#buttonIntro:hover {
    background-color: #000000;
    border: 5px solid white;
    color: white;
  }

  #buttonAuthor{
    position: absolute;
    background-color: white;
    color: black;
    border: 5px solid black;
    font-family: 'Timmana';
    padding: 16px 16px 0px 16px;
    font-size: 24px;
    top: 90vh;
    right: 3vh;
    
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    border-radius: 10px;
    cursor: pointer;
}
 
#buttonAuthor:hover {
    background-color: #000000;
    border: 5px solid white;
    color: white;
  }

  #author{
    position: relative;
    font-family: 'Timmana';
    font-size: 20px;
    top:18vh;
    left: 90vh;

    }

body {
    height: 100vh;
    /*vh stands for viewport height, this is the visible height of your webpage. By setting
    this value to 100, our body will take 100% of the available height space*/
    /*display: flex;    */
    background: rgb(155, 93, 35);
    z-index: 1;
}

.imgBottom{
    display: flex;
    height: 10%;
    position: absolute;
    width: 100%;
    bottom: 0%;
    padding: 2px;
}

.imgB{
    height: 100%;
    width: 10%;
    display: none;
    /* visibility: hidden; */
    padding: 10px;
}

.show-imgB{
    background: #120;
    height: 100%;
    width: 10%;
    opacity: 0.9;
    padding: 10px;
    visibility: visible;
}

#navBottom{
    display: none;
    height: 15%;
    position: absolute;
    
    width: 100%;
    bottom: 10%;
    padding: 2px;
}

.navButtons{
    margin:auto;
    width: 50%;
    
}

#buttonNav{
    position: relative;
    background-color: white;
    color: black;
    border: 5px solid black;
    font-family: 'Timmana';
    
    padding: 8px 8px 0px 8px;
    font-size: 35px;
    
    /* top: 20vh;  */
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    border-radius: 10px;
    cursor: pointer;
}
 
#buttonNav:hover {
    background-color: #000000;
    border: 5px solid white;
    color: white;
  }


  #buttonHome{
    position: absolute;
    top: 2%;
    right: 2%;
    background-color: white;
    color: black;
    border: 3px solid black;
    font-family: 'Timmana';
    
    padding: 8px 8px 0px 8px;
    font-size: 20px;
    
    /* top: 20vh;  */
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    border-radius: 10px;
    cursor: pointer;
}
 
#buttonHome:hover {
    background-color: #000000;
    border: 5px solid white;
    color: white;
  }

  #buttonQuiz{
    position: relative;
    background-color: white;
    color: black;
    border: 5px solid black;
    font-family: 'Timmana';
    display: block;
    padding: 8px 8px 0px 8px;
    font-size: 35px;
    
    /* top: 20vh;  */
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    border-radius: 10px;
    cursor: pointer;
}
 
#buttonQuiz:hover {
    background-color: #000000;
    border: 5px solid white;
    color: white;
  }

/*

show-image {
        background: #550;
        height: 100%;
        width: 10%;
        opacity: 0.9;
        padding: 10px;
}

*/


canvas{
    height: 100%;
    border: thin solid #000000;
    position: relative;
    z-index: -3 !important;
}

.memory-game {

    width: 70%;
    height: 70%;
    /*
    width: 800px;
    height: 520px;
    */
    margin:auto;
    position: relative;
    top: 5%;
    /*display flex pre-sets some properties for us. 
    (a) each item will take the same amount of space in the screen
    (b) items will be stretched out across the row and arranged from L to R*/
    display: flex;
    /*flex-wrap allows the card items to be laid out across multiple rows*/
    flex-wrap: wrap;
    /*Add some 3D depth to our display*/
    perspective: 1000px;
}

.memory-card {
    /*cards will be 5 columns across and 4 rows down on the webpage*/
    width: calc(20% - 10px);
    height: calc(25% - 10px);
    margin: 5px;
    position: relative;
    transform: scale(1);
    transform-style: preserve-3d;
    transition: transform .5s;
}

/*When a card item is clicked, transform to 0.97 of original size*/
.memory-card:active {
    transform: scale(0.97);
    /*Add smoothness to this transformation*/
    transition: transform .2s;
}

/*When the card is clicked, rotate the Y axis 180 degrees.*/
.memory-card.flip {
 transform: rotateY(180deg);
}

.front-face{
    /*front and back face will occupy 100% of their containers*/
    width: 100%;
    height: 100%;
    /*20px of padding will be added around the cards*/
    padding: 10px;
    /*front face and back face must be positioned on top of eachother*/
    position: absolute;
    border-radius: 5px;
    background: #01183f;
    backface-visibility: hidden;

} 
.back-face {
    /*front and back face will occupy 100% of their containers*/
    width: 100%;
    height: 100%;
    /*20px of padding will be added around the cards*/
    padding: 10px;
    /*front face and back face must be positioned on top of eachother*/
    position: absolute;
    border-radius: 5px;
    background: #cacbce;
    backface-visibility: hidden;
}

.front-face {
    transform: rotateY(180deg);
}


/*-----------------MODAL STUFF BELOW------------------*/
/*----------------------------------------------------*/
/*--https://sabe.io/tutorials/how-to-create-modal-popup-box-- */

.modal {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transform: scale(1.1);
    transition: visibility 0s linear 0.25s, opacity 0.25s 0s, transform 0.25s;
}
.modal-content {
    position: absolute;
    overflow-y: auto;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgb(2, 22, 56);
    font-family: 'Roboto';
    color: white;
    padding: 1rem 1.5rem;
    width: 60%;
    height: 75%;
    border-radius: 0.5rem;
}

.modalAuthor {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transform: scale(1.1);
    transition: visibility 0s linear 0.25s, opacity 0.25s 0s, transform 0.25s;
}
.modalAuthor-content {
    position: absolute;
    overflow-y: auto;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    /*
    background-color: rgb(114, 131, 181);
    */
    background-color: rgb(93, 106, 143);
    font-family: 'Roboto';
    color: black;
    padding: 1rem 1.5rem;
    width: 60%;
    height: 75%;
    border-radius: 0.5rem;
}

.close-buttonAuthor {
    float: right;
    width: 1.5rem;
    line-height: 1.5rem;
    text-align: center;
    cursor: pointer;
    border-radius: 0.25rem;
    background-color: lightgray;
}
.close-buttonAuthor:hover {
    background-color: darkgray;
}

.modalInstructions {
    position: fixed;
    overflow-y: auto;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transform: scale(1.1);
    transition: visibility 0s linear 0.25s, opacity 0.25s 0s, transform 0.25s;
}

#instructionsBlurb {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgb(2, 22, 56);
    font-family: 'Roboto';
    color: white;
    padding: 1rem 1.5rem;
    width: 60%;
    height: 75%;
    border-radius: 0.5rem;
}

#modalIMG{
    
    position: absolute;
    left: 43%;
    height: 82%;
    width: 55%;

}

#modalInfo{
    position: absolute;
    text-align: justify;
    top: 13%;
    left: 20px;
    color: white;
    right: 55%;
    font-size: 20px;
    line-height: 30px;
}

#modalInfoAuthor{
    position: absolute;
    text-align: justify;
    top: 13%;
    left: 20px;
    color: black;
    right: 55%;
    font-size: 20px;
    line-height: 30px;
}

#modalBlurbAuthor{

    font-size: 20px;
    line-height: 20px;
}

#modalBlurb{
    font-size: 15px;
    line-height: 20px;
}
.close-button {
    float: right;
    width: 1.5rem;
    line-height: 1.5rem;
    text-align: center;
    cursor: pointer;
    border-radius: 0.25rem;
    background-color: lightgray;
}
.close-button:hover {
    background-color: darkgray;
}
.show-modal {
    opacity: 1;
    visibility: visible;
    transform: scale(1.0);
    transition: visibility 0s linear 0s, opacity 0.25s 0s, transform 0.25s;
}