@media screen and (orientation: portrait) {
  html {
    transform: rotate(-90deg);
    transform-origin: left top;
    width: 100vh;
    overflow-x: hidden;
    position: absolute;
    top: 100%;
    left: 0;
  }
}
.images {
    width: 150px;
    height: 150px;
    display: inline-block;
    background-size: 95%;
    background-position: center;
    background-repeat: no-repeat;
}







/*First Level Start*/
#first-question-fist-image {
    background-image: url("");
}



#first-question-second-image {
    background-image: url("../img/alfas.png");
}

#first-question-third-image {
    background-image: url("");
}

#first-question-fourth-image {
    background-image: url("");
}

#first-answer-fist-image {
    background-image: url("../img/betac.png");

}


#first-answer-second-image {
    background-image: url("../img/alfac.png");

}



#first-answer-third-image {
    background-image: url("../img/gammac.png");

}

/*First Level End*/


/*Second Level Start*/
#second-question-fist-image {
    background-image: url("");
}

#second-question-second-image {
    background-image: url("../img/betas.png");
}

#second-question-third-image {
    background-image: url("");
}

#second-question-fourth-image {
    background-image: url("");
}

#second-answer-fist-image {
    background-image: url("../img/betac.png");
}

#second-answer-second-image {
    background-image: url("../img/alfac.png");
}

#second-answer-third-image {
    background-image: url("../img/gammac.png");
}

/*Second Level End*/


/*Third Level Start*/
#third-question-fist-image {
    background-image: url("");
}

#third-question-second-image {
    background-image: url("../img/gammas.png");
}

#third-question-third-image {
    background-image: url("");
}

#third-question-fourth-image {
    background-image: url("");
}

#third-answer-fist-image {
    background-image: url("../img/deltac.png");
}

#third-answer-second-image {
    background-image: url("../img/epsilonc.png");
}

#third-answer-third-image {
    background-image: url("../img/gammac.png");
}

/*Third Level End*/

#fourth-question-fist-image {
    background-image: url("");
}

#fourth-question-second-image {
    background-image: url("../img/deltas.png");
}

#fourth-question-third-image {
    background-image: url("");
}

#fourth-question-fourth-image {
    background-image: url("");
}

#fourth-answer-fist-image {
    background-image: url("../img/gammac.png");
}

#fourth-answer-second-image {
    background-image: url("../img/deltac.png");
}

#fourth-answer-third-image {
    background-image: url("../img/epsilonc.png");
}
/*Fourth Level End*/
#fifth-question-fist-image {
    background-image: url("");
}

#fifth-question-second-image {
    background-image: url("../img/epsilons.png");
}

#fifth-question-third-image {
    background-image: url("");
}

#fifth-question-fourth-image {
    background-image: url("");
}

#fifth-answer-fist-image {
    background-image: url("../img/epsilonc.png");
}

#fifth-answer-second-image {
    background-image: url("../img/zetac.png");
}

#fifth-answer-third-image {
    background-image: url("../img/etac.png");
}
/*Fourth Level End*/
#sixth-question-fist-image {
    background-image: url("");
}

#sixth-question-second-image {
    background-image: url("../img/zetas.png");
}

#sixth-question-third-image {
    background-image: url("../img/");
}

#sixth-question-fourth-image {
    background-image: url("");
}

#sixth-answer-fist-image {
    background-image: url("../img/etac.png");
}

#sixth-answer-second-image {
    background-image: url("../img/zetac.png");
}

#sixth-answer-third-image {
    background-image: url("../img/thetac.png");
}
/*Fourth Level End*/
#seventh-question-fist-image {
    background-image: url("");
}

#seventh-question-second-image {
    background-image: url("../img/etas.png");
}

#seventh-question-third-image {
    background-image: url("");
}

#seventh-question-fourth-image {
    background-image: url("");
}

#seventh-answer-fist-image {
    background-image: url("../img/iotac.png");
}

#seventh-answer-second-image {
    background-image: url("../img/kappac.png");
}

#seventh-answer-third-image {
    background-image: url("../img/etac.png");
}
/*Fourth Level End*/
#eighth-question-fist-image {
    background-image: url("");
}

#eighth-question-second-image {
    background-image: url("../img/thetas.png");
}

#eighth-question-third-image {
    background-image: url("");
}

#eighth-question-fourth-image {
    background-image: url("");
}

#eighth-answer-fist-image {
    background-image: url("../img/iotac.png");
}

#eighth-answer-second-image {
    background-image: url("../img/kappac.png");
}

#eighth-answer-third-image {
    background-image: url("../img/thetac.png");
}
/*Fourth Level End*/
#ninth-question-fist-image {
    background-image: url("");
}

#ninth-question-second-image {
    background-image: url("../img/iotas.png");
}

#ninth-question-third-image {
    background-image: url("");
}

#ninth-question-fourth-image {
    background-image: url("");
}

#ninth-answer-fist-image {
    background-image: url("../img/iotac.png");
}

#ninth-answer-second-image {
    background-image: url("../img/kappac.png");
}

#ninth-answer-third-image {
    background-image: url("../img/lamdac.png");
}

/*Fourth Level End*/
#tenth-question-fist-image {
    background-image: url("");
}

#tenth-question-second-image {
    background-image: url("../img/kappas.png");
}

#tenth-question-third-image {
    background-image: url("");
}

#tenth-question-fourth-image {
    background-image: url("");
}

#tenth-answer-fist-image {
    background-image: url("../img/mic.png");
}

#tenth-answer-second-image {
    background-image: url("../img/kappac.png");
}

#tenth-answer-third-image {
    background-image: url("../img/lamdac.png");
}

/*Fourth Level End*/
#eleventh-question-fist-image {
    background-image: url("");
}

#eleventh-question-second-image {
    background-image: url("../img/lamdas.png");
}

#eleventh-question-third-image {
    background-image: url("");
}

#eleventh-question-fourth-image {
    background-image: url("");
}

#eleventh-answer-fist-image {
    background-image: url("../img/mic.png");
}

#eleventh-answer-second-image {
    background-image: url("../img/nic.png");
}

#eleventh-answer-third-image {
    background-image: url("../img/lamdac.png");
}

/*Fourth Level End*/
#twelfth-question-fist-image {
    background-image: url("");
}

#twelfth-question-second-image {
    background-image: url("../img/mis.png");
}

#twelfth-question-third-image {
    background-image: url("");
}

#twelfth-question-fourth-image {
    background-image: url("");
}

#twelfth-answer-fist-image {
    background-image: url("../img/nic.png");
}

#twelfth-answer-second-image {
    background-image: url("../img/mic.png");
}

#twelfth-answer-third-image {
    background-image: url("../img/xic.png");
}

/*Fourth Level End*/
#thirteenth-question-fist-image {
    background-image: url("../img/");
}

#thirteenth-question-second-image {
    background-image: url("../img/nis.png");
}

#thirteenth-question-third-image {
    background-image: url("");
}

#thirteenth-question-fourth-image {
    background-image: url("");
}

#thirteenth-answer-fist-image {
    background-image: url("../img/nic.png");
}

#thirteenth-answer-second-image {
    background-image: url("../img/xic.png");
}

#thirteenth-answer-third-image {
    background-image: url("../img/omicronc.png");
}

/*Fourth Level End*/
#fourteenth-question-fist-image {
    background-image: url("");
}

#fourteenth-question-second-image {
    background-image: url("../img/xis.png");
}

#fourteenth-question-third-image {
    background-image: url("");
}

#fourteenth-question-fourth-image {
    background-image: url("");
}

#fourteenth-answer-fist-image {
    background-image: url("../img/omicronc.png");
}

#fourteenth-answer-second-image {
    background-image: url("../img/pic.png");
}

#fourteenth-answer-third-image {
    background-image: url("../img/xic.png");
}

/*Fourth Level End*/
#fifteenth-question-fist-image {
    background-image: url("");
}

#fifteenth-question-second-image {
    background-image: url("../img/omicrons.png");
}

#fifteenth-question-third-image {
    background-image: url("");
}

#fifteenth-question-fourth-image {
    background-image: url("");
}

#fifteenth-answer-fist-image {
    background-image: url("../img/omicronc.png");
}

#fifteenth-answer-second-image {
    background-image: url("../img/pic.png");
}

#fifteenth-answer-third-image {
    background-image: url("../img/rhoc.png");
}
/*Fourth Level End*/
#sixteenth-question-fist-image {
    background-image: url("");
}

#sixteenth-question-second-image {
    background-image: url("../img/pis.png");
}

#sixteenth-question-third-image {
    background-image: url("");
}

#sixteenth-question-fourth-image {
    background-image: url("");
}

#sixteenth-answer-fist-image {
    background-image: url("../img/rhoc.png");
}

#sixteenth-answer-second-image {
    background-image: url("../img/pic.png");
}

#sixteenth-answer-third-image {
    background-image: url("../img/sigmac.png");
}
/*Fourth Level End*/
#seventeenth-question-fist-image {
    background-image: url("");
}

#seventeenth-question-second-image {
    background-image: url("../img/rhos.png");
}

#seventeenth-question-third-image {
    background-image: url("");
}

#seventeenth-question-fourth-image {
    background-image: url("");
}

#seventeenth-answer-fist-image {
    background-image: url("../img/sigmac.png");
}

#seventeenth-answer-second-image {
    background-image: url("../img/tauc.png");
}

#seventeenth-answer-third-image {
    background-image: url("../img/rhoc.png");
}

/*Fourth Level End*/
#eighteenth-question-fist-image {
    background-image: url("");
}

#eighteenth-question-second-image {
    background-image: url("../img/sigmas.png");
}

#eighteenth-question-third-image {
    background-image: url("");
}

#eighteenth-question-fourth-image {
    background-image: url("");
}

#eighteenth-answer-fist-image {
    background-image: url("../img/sigmac.png");
}

#eighteenth-answer-second-image {
    background-image: url("../img/tauc.png");
}

#eighteenth-answer-third-image {
    background-image: url("../img/ipsilonc.png");
}

/*Fourth Level End*/
#nineteenth-question-fist-image {
    background-image: url("");
}

#nineteenth-question-second-image {
    background-image: url("../img/taus.png");
}

#nineteenth-question-third-image {
    background-image: url("");
}

#nineteenth-question-fourth-image {
    background-image: url("");
}

#nineteenth-answer-fist-image {
    background-image: url("../img/ipsilonc.png");
}

#nineteenth-answer-second-image {
    background-image: url("../img/tauc.png");
}

#nineteenth-answer-third-image {
    background-image: url("../img/phic.png");
}
/*Fourth Level End*/
#twentieth-question-fist-image {
    background-image: url("");
}

#twentieth-question-second-image {
    background-image: url("../img/ipsilons.png");
}

#twentieth-question-third-image {
    background-image: url("");
}

#twentieth-question-fourth-image {
    background-image: url("");
}

#twentieth-answer-fist-image {
    background-image: url("../img/phic.png");
}

#twentieth-answer-second-image {
    background-image: url("../img/ipsilonc.png");
}

#twentieth-answer-third-image {
    background-image: url("../img/chic.png");
}
/*Fourth Level End*/
#twentyfirst-question-fist-image {
    background-image: url("");
}

#twentyfirst-question-second-image {
    background-image: url("../img/phis.png");
}

#twentyfirst-question-third-image {
    background-image: url("");
}

#twentyfirst-question-fourth-image {
    background-image: url("");
}

#twentyfirst-answer-fist-image {
    background-image: url("../img/chic.png");
}

#twentyfirst-answer-second-image {
    background-image: url("../img/psic.png");
}

#twentyfirst-answer-third-image {
    background-image: url("../img/phic.png");
}
/*Fourth Level End*/
#twentysecond-question-fist-image {
    background-image: url("");
}

#twentysecond-question-second-image {
    background-image: url("../img/chis.png");
}

#twentysecond-question-third-image {
    background-image: url("");
}

#twentysecond-question-fourth-image {
    background-image: url("");
}

#twentysecond-answer-fist-image {
    background-image: url("../img/omegac.png");
}

#twentysecond-answer-second-image {
    background-image: url("../img/psic.png");
}

#twentysecond-answer-third-image {
    background-image: url("../img/chic.png");
}
/*Fourth Level End*/
#twentythird-question-fist-image {
    background-image: url("");
}

#twentythird-question-second-image {
    background-image: url("../img/psis.png");
}

#twentythird-question-third-image {
    background-image: url("");
}

#twentythird-question-fourth-image {
    background-image: url("");
}

#twentythird-answer-fist-image {
    background-image: url("../img/psic.png");
}

#twentythird-answer-second-image {
    background-image: url("../img/chic.png");
}

#twentythird-answer-third-image {
    background-image: url("../img/omegac.png");
}
/*Fourth Level End*/
#twentyfourth-question-fist-image {
    background-image: url("");
}

#twentyfourth-question-second-image {
    background-image: url("../img/omegas.png");
}

#twentyfourth-question-third-image {
    background-image: url("");
}

#twentyfourth-question-fourth-image {
    background-image: url("");
}

#twentyfourth-answer-fist-image {
    background-image: url("../img/chic.png");
}

#twentyfourth-answer-second-image {
    background-image: url("../img/psic.png");
}

#twentyfourth-answer-third-image {
    background-image: url("../img/omegac.png");
}
#second-level {
    display: none;
}

#third-level {
    display: none;
}

#fourth-level {
    display: none;
}

#fifth-level {
    display: none;
}

#sixth-level {
    display: none;
}

#seventh-level {
    display: none;
}

#eighth-level {
    display: none;
}

#ninth-level {
    display: none;
}

#tenth-level {
    display: none;
}

#eleventh-level {
    display: none;
}

#twelfth-level {
    display: none;
}

#thirteenth-level {
    display: none;
}


#fourteenth-level {
    display: none;
}

#fifteenth-level {
    display: none;
}

#sixteenth-level {
    display: none;
}

#seventeenth-level {
    display: none;
}

#eighteenth-level {
    display: none;
}

#nineteenth-level {
    display: none;
}

#twentieth-level {
    display: none;
}
#twentyfirst-level {
    display: none;
}
#twentysecond-level {
    display: none;
}
#twentythird-level {
    display: none;
}
#twentyfourth-level {
    display: none;
}
#twentyfifth-level {
    display: none;
    text-align: left;
}


#welcome-message {
    text-align: center;
}

#first-answer div, #second-answer div, #third-answer div, #fourth-answer div, #fifth-answer div,
#sixth-answer div, #seventh-answer div, #eighth-answer div, #ninth-answer div, #tenth-answer div, #eleventh-answer div,
#twelfth-answer div, #thirteenth-answer div, #thirteenth-answer div, #fourteenth-answer div, #fifteenth-answer div, #sixteenth-answer div,
#seventeenth-answer div, #eighteenth-answer div, #nineteenth-answer div, #twentieth-answer div, #twentyfirst-answer div, #twentysecond-answer div,
#twentythird-answer div, #twentyfourth-answer div{
    cursor: pointer;
}

#first-answer div:hover, #second-answer div:hover, #third-answer div:hover, #fourth-answer div:hover, #fifth-answer div:hover,
#sixth-answer div:hover, #seventh-answer div:hover, #eighth-answer div:hover, #ninth-answer div:hover, #tenth-answer div:hover,
#eleventh-answer div:hover, #twelfth-answer div:hover, #thirteenth-answer div:hover, #thirteenth-answer div:hover, #fourteenth-answer div:hover,
#fifteenth-answer div:hover, #sixteenth-answer div:hover, #seventeenth-answer div:hover, #eighteenth-answer div:hover, #nineteenth-answer div:hover,
#twentieth-answer div:hover, #twentyfirst-answer div:hover, #twentysecond-answer div:hover, #twentythird-answer div:hover,
#twentyfourth-answer div:hover{
    box-shadow: 0px 0px 4px 4px #888888;
}

#overlay {
    position: fixed; /* Sit on top of the page content */
    display: none; /* Hidden by default */
    width: 100%; /* Full width (cover the whole page) */
    height: 100%; /* Full height (cover the whole page) */
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5); /* Black background with opacity */
    z-index: 2; /* Specify a stack order in case you're using a different order for other elements */
    cursor: pointer; /* Add a pointer on hover */
}

#overlay img {
    width: 100px;
    position: absolute;
    top: 45%;
    left: 50%;
}

#overlay h1 {
    position: absolute;
    top: 60%;
    left: 42%;
}

#congratulations {
    background-image: url(../img/congratulations.gif);
    background-repeat: no-repeat;
    background-position: center;
    width: 100%;
    height: 400px;
    margin-top: 50px;
}



.btn {
    cursor: pointer;
    color: #fff;
    background-color: #28a745;
    display: inline-block;
    font-weight: 400;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    border: 1px solid transparent;
    padding: .375rem .75rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: .25rem;
    transition: color .15s ease-in-out, background-color .15s ease-in-out, border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}

.btn:hover {
    color: #fff;
    background-color: #449d44;
}