* {
    box-sizing: border-box;
}
body {
    font-family: Tahoma, Arial;
    margin-top: 150px;
}
.quiz-app {
    margin: 20px auto;
    width: 500px;
    background-color: #f8f8f8;
    padding: 15px;
}
.quiz-app .quiz-info {
    display: flex;
    background-color: #fff;
    padding: 20px;
}
.quiz-app .quiz-info .category {
    flex: 1;
}
.quiz-app .quiz-info .count {
    flex: 1;
    text-align: right;
}
.quiz-app .quiz-area {
    background-color: #fff;
    padding: 20px;
    margin-top: 15px;
}
.quiz-app .quiz-area h2 {
    margin: 0;
}
.quiz-app .answers-area {
    background-color: #fff;
    padding: 0 20px 20px;
}
.quiz-app .answers-area .answer {
    background-color: #f9f9f9;
    padding: 15px;
}
.quiz-app .answers-area .answer:not(:last-child) {
    border-bottom: 1px solid #dfdfdf;
}
.quiz-app .answers-area .answer input[type="Radio"]:checked + label {
    color: #0075ff;
}
.quiz-app .answers-area .answer label {
    cursor: pointer;
    font-weight: bold;
    color: #777;
    font-size: 14px;
    margin-left: 5px;
    position: relative;
    top: -1px;
}
.quiz-app .submit-button {
    background-color: #0075ff;
    display: block;
    width: 100%;
    padding: 15px;
    border: none;
    color: #fff;
    font-weight: bold;
    font-size: 18px;
    cursor: pointer;
    border-radius: 6px;
    margin: 20px auto;
}
.quiz-app .submit-button:focus {
    outline: none;
}
.quiz-app .bullets {
    border-top: 1px solid #dfdfdf;
    background-color: #fff;
    display: flex;
    padding: 20px;
}
.quiz-app .bullets .spans {
    flex: 1;
    display: flex;
}
.quiz-app .bullets .spans span {
    width: 20px;
    height: 20px;
    background-color: #ddd;
    margin-right: 5px;
    border-radius: 50%;
}
.quiz-app .bullets .spans span.on {
    background-color: #0075ff;
}
.quiz-app .results span {
    font-weight: bold;
}
.quiz-app .results span.bad {
    color: #dc0a0a;
}
.quiz-app .results span.good {
    color: #009688;
}
.quiz-app .results span.perfect {
    color: #0075ff;
}

.fullscreen-video {
    position: fixed;
    overflow: hidden;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translateX(-50%) translateY(-50%);
    z-index: -10;
}

.bg-overlay {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    background-color: #000;
    opacity: 0.6;
    z-index: -9;
}

/*btn*/
.main-play-btn{
    margin: 0px 20px;
    padding-top: 5px;
    color: #ffffff;
    background: linear-gradient(97deg,rgba(108,203,255,1) 0%, rgba(0,148,255,1) 100%);
    width: 210px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-content: center;
    font-size: 1.4rem;
    text-transform: uppercase;
    border-radius: 14px;
    text-shadow: 2px 2px 3px rgba(0,0,0,0.13);
    font-family: Sigmar One;
    box-shadow: rgb(79,148,238) -0px 1px,
    rgb(15,82,144) -0px 2px, rgb(15,82,144) -0px 3px,
    rgb(15,82,144) -0px 4px, rgb(15,82,144) -0px 5px,
    rgb(15,82,144) -0px 6px, rgb(15,82,144) -0px 7px,
    rgb(15,82,144) -0px 8px, rgb(15,82,144) -0px 9px,
    rgb(15,82,144) -0px 10px, rgb(15,82,144) -0px 11px;
    transform: translate3d(8px, -8px, 0px);

}
.main-play-btn{
    position: relative;
}
.main-play-btn::before{
    position: absolute;
    content: '';
    left: 34px;
    top: -8px;
    z-index: 3;
    background-image: url(img/bg_btn.png);
    background-position: center;
    background-repeat: no-repeat;
    background-size: 25px;
    width: 25px;
    height: 25px;
}
.main-play-btn:hover{
    background:linear-gradient(97deg, rgba(225,209,64,1) 0%, rgba(255,177,1,1) 100%);
    box-shadow: #e3a700 -0px 1px, #e3a700 -0px 2px,
    #e3a700 -0px 3px, #e3a700 -0px 4px,
    #e3a700 -0px 5px, #e3a700 -0px 6px,
    #e3a700 -0px 7px, #e3a700 -0px 8px,
    #e3a700 -0px 9px, #e3a700 -0px 10px,
    #e3a700 -0px 11px;
}
/*play-btn*/
.main-play-btn{
    margin: 40px auto;
    width: 200px;
    height: 40px;
    font-size: 2rem;
    text-decoration: none;
}
.main-play-btn::before{
    left: 5px;
    top: 0px;
}