*,
*::after,
*::before {
    margin: 0;
    padding: 0;
    box-sizing: inherit;
}
body {
    box-sizing: border-box;
    background-image: url('../images/tardis-police-box-vector-wallpaper.jpg');
    background-attachment: fixed;
    background-position: top;
}
.wrapper{
    width: 50%;
    background-color: #ffffff;
    margin:2.5rem auto;
    padding: 3rem;
    border-radius: 10px;
}
.welcome-box{
    text-align: center;
    display: none;
}
.welcome-box.show{
    display: block;
    animation: fadeIn 1s ease;
}
.welcome-box header{
    padding:0 0 2rem 0;
}
h1{
    color: #0B0C2A;
    font-size: 2.2rem;
    font-family: 'Kurale', serif;
    padding-bottom: .6rem;
    
}
header hr{
    border-bottom: 1px solid #0B0C2A;
    width: 60%;
    margin: 0 auto;
    box-shadow: 9px 3px 15px #0B0C2A;
}
main{
    font-size: 1.3rem;
    font-family: 'Raleway', sans-serif;
    margin-bottom: 3rem;

}
main .cite{
    font-size: .9rem;
    font-style: italic;
    font-family: monospace;
    text-align: right;
    margin-top: 1rem;
}
.btn{
    background-color: #1c3672;
    border: 2px solid #0f2964;
    padding: .8rem 2.5rem;
    color: #fff;
    font-size: 1.3rem;
    border-radius: 35px;
    font-family: 'Kurale', serif;
    cursor: pointer;
    margin: 0 10px;
}

.btn:hover,.btn:active{
    /* outline: none; */
    background-color: #0068C1;
}
.main-box{
    display: none;
}
.main-box.show{
    display: block;
    animation: fadeIn 1s ease;
}
@keyframes fadeIn{
    0%{
        opacity: 0;
        transform: translateX(-40px);
    }
    100%{
        opacity: 1;
        transform: translateX(0px);
    }
}
.main-box .info{
    display: flex;
    flex-flow: row wrap;
    justify-content: space-between;
    font-size: 1.8rem;
    text-transform: uppercase;
    color: #0B0C2A;
    font-family: 'Raleway', sans-serif;

}
.main-box .info .current-question{
    color:#fff;
    background-color: #1c3672;
    border: 2px solid #1c3672;
    border-radius: 50%;
    font-family: 'Kurale', serif;
    font-size: 1.4rem;
    font-weight: 800;
    line-height: 4.2rem;
    text-align: center;
    height: 70px;
    width: 70px;

}
.main-box .info .score-board{
    flex-basis: 50%;
    text-align: right;
}
.main-box .info .score-board .correct-score{
    font-weight:bold;
}
.main-box .question-board{
    font-family: 'Kurale', serif;
    color: #0B0C2A;
    background-color: #081e5350;
    font-size: 1.5rem;
    border-radius: 10px;
    text-align: center;
    padding: 1.7rem 1.5rem;
    margin: 2.5rem 1rem 2rem;
}
.main-box .choice-board{
    display: flex;
    flex-flow: row wrap;
    justify-content: space-between;
}
.main-box .choice-board .choice{
    background-color: #081e5350;
    flex-basis: 45%;
    border-radius: 30px;
    margin: 1rem;
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    font-family: 'Raleway', sans-serif;
    font-size: 1.2rem;
    color: #0B0C2A;
    opacity: 0;
    animation: zoomIn .3s linear forwards; 
}
@keyframes zoomIn{
    0%{
        transform: scale(0.8);
    }
    100%{
        transform: scale(1);
        opacity: 1;
    }
}
.main-box .choice-board .choice.already-answered{
    pointer-events: none;
}
.main-box .choice-board .choice.show-correct{
    background-color: green;
    color: #fff;
   transition: all .3s ease;
}

.main-box .choice-board .choice.correct{
    background-color:green;
    color: #fff;
    opacity: 1;
    animation: pulse 1s linear;
}
@keyframes pulse{
    0%{
        transform:  scale(1);
    }
    50%{
        transform: scale(1.1);
    }
    100%{
        transform: scale(1);
    }
}
.main-box .choice-board .choice.wrong{
    background-color: red;
    color: #fff;
    opacity: 1;
    animation: shake 1s linear;
}
@keyframes shake{
    0%,30%,50%{
        transform: translateX(10px);
    }
    20%,40%{
        transform: translateX(-10px);
    }
    60%{
        transform: translateX(-7px);
    }
    70%{
        transform: translateX(7px);
    }
    80%{
        transform: translateX(-4px);
    }
    90%{
        transform: translateX(4px);
    }
    100%{
        transform: translateX(0px);
    }
}
.main-box .next-question{
    margin-top: 3rem;
    text-align: center;
}
.next-btn,.leave-quiz-btn{
    display: none;
}
.next-btn.show,.leave-quiz-btn.show{
    display: inline-block;
    animation: fadeIn 1s ease;
    
}

.end-box{
    text-align: center;
    display: none;
}
.end-box.show{
    display: block;
    animation: fadeIn 1s ease;

}
.end-box header p{
    margin-bottom: 1rem;
}
.total-correct{
    font-size: 2rem;
    color: #0B0C2A;
}
h4{
    font-size: 1.2rem;
    font-weight: normal;
    margin: 1rem 0 20px;
}

.end-box h4 span{
font-weight: 800;
}

.restart-btn,.home-btn{
    margin-top: 1rem;
}

/* media Queries */
@media screen and (max-width:1472px) and (min-width:1200px){
    .wrapper{
        width: 68%;
    }
    .main-box .choice-board .choice{
        flex-basis: 43%;
    }
}
@media screen and (max-width:1199px) and (min-width:1000px){
    .wrapper{
        width: 68%;
    }
    .main-box .choice-board .choice{
        flex-basis: 43%;
    }
}
@media screen and (max-width:999px) and (min-width:880px){
    .wrapper{
        width: 75%;
    }
    .main-box .choice-board .choice{
        flex-basis: 43%;
    }
    
}
@media screen and (max-width:879px) and (min-width:710px){
    .wrapper{
        width: 70%;
    }
    .main-box .choice-board .choice{
        flex-basis: 70%;
        margin-left: auto;
        margin-right: auto;
    }
    
}
@media screen and (max-width:709px) and (min-width:670px){
    .wrapper{
        width: 73%;
    }
    
    .main-box .choice-board .choice{
        flex-basis: 75%;
        margin-left: auto;
        margin-right: auto;
    }
    
    .main-box .question-board{
        font-size: 1.3rem;
        padding: 1.7rem 1.5rem;
    }
}
@media screen and (max-width:669px) and (min-width:570px){
    .wrapper{
        width: 80%;
        padding: 2rem;
    }
    
    .main-box .choice-board .choice{
        flex-basis: 80%;
        margin-left: auto;
        margin-right: auto;
    }
    .main-box .question-board{
        font-size: 1.3rem;
        padding: 1.7rem 1.5rem;
    }
    
}
@media (max-width:569px){
    h1{
        font-size: 1.8rem;
        
    }
    .main-box .question-board{
        
        font-size: 1.15rem;
       
        padding: 1.5rem 1.3rem;
    }
    .wrapper{
        width: 85%;
        padding: 1.5rem;
    }
    main{
        font-size: 1.2rem;
    }
    .main-box .choice-board .choice{
        flex-basis: 90%;
        margin-left: auto;
        margin-right: auto;
        font-size: 1rem;
    }
    
}