.quiz_area{
    padding: 0 40px;
    text-align: center;
}

h1.pict_title {
    font-size: 30px;
    text-align: center;
    border-bottom: solid 3px rgb(0, 162, 255);
    margin: 20px 200px;
  }
  
p{
    font-size: 17px;
}
  
.rule{
    text-align: center;
    font-size: 1.1em;
}


.example{
    font-size: 20px;
    text-align: center;
}

.buttons ul{
    display: flex;
    justify-content: center;
}

.buttons li{
    list-style: none;
}

img{
    width: 250px;
    margin: 20px 40px;
}


.start{
    clear: left;
    text-align: center;
    margin: 30px;
}

.link_button{
    font-size: 30px;
    color: white;
    background-color: rgb(0, 162, 255);
    padding: 10px 50px;
    margin: 10px 70px;
    border-radius: 10px;
}

.buttons{
    margin: 20px;
}

p.explain{
    text-indent: 1rem;
    text-align: left;
}

span{
    color: rgb(0, 162, 255);
    font-size: 150%;
}

h2{
    font-size: 30px;
    text-align: center;
    padding: 50px 0 0 0 ;
}

h3{
    font-size: 15px;
    text-align: right;
}

img{
    width: 250px;
    margin: 20px 40px;
}

.child2{
    padding: 80px 0;
}

.select{
    display: list-item;
    list-style: none;
    cursor: pointer;
    width:400px;
    border: 1px solid #ccc;
    border-radius: 3px;
    text-align: center;
    line-height: 40px;
    margin: 15px auto 0;
    font-size: 15px;
}

.check{
    background-color: rgb(212, 212, 212);
}

@media (min-width: 600px) {
    .parent {
      display: flex;
    }
    .child1 {
      flex-grow: 1;
    }
    .child2 {
      flex-grow: 1;
    }
  }

@media only screen and (max-width:480px){
    .quiz_area{
    padding: 0 10px;
    text-align: center;
    }
    h1.pict_title{
        font-size: 20px;
        margin: 10px 30px;
    }
    .rule{
        text-align: left;
        text-indent: 1rem;
        margin: 20px 0;
    }
    p{
        font-size: 15px;
    }
    h2{
        font-size: 20px;
        text-align: center;
        padding: 0;
    }
    img{
        width: 150px;
    }
    .child2{
        padding: 0;
    }
    .select{
        display: list-item;
        list-style: none;
        cursor: pointer;
        width:250px;
        border: 1px solid #ccc;
        border-radius: 3px;
        text-align: center;
        line-height: 40px;
        margin: 10px auto 0;
        font-size: 15px;
    }
    #answerDisp{
        margin: 10px 0;
    }
    .buttons ul{
        display: block;
        justify-content: center;
    }
    .buttons li{
        padding: 15px 0;
        text-align: center;
    }
    .link_button{
        font-size: 20px;
        color: white;
        background-color: rgb(0, 162, 255);
        padding: 10px 30px;
        border-radius: 10px;
    }
}