*{
    padding: 0;
    margin: 0;
}

body{
    font-family: 'Luckiest Guy';
    background: #e6e6ea;
}

.container{
    padding: 20px;
    overflow: hidden;
    background-color: #f14a49;
}

.container h1{
    float: left;
    margin-left: 10%;
    color: white;
}

.container ul{
    list-style-type: none;
    font-size: 20px;
    margin-left: 60%;
}

.container li{
    margin-top: 10px;
    float: left;
    padding: 0 20px;
}

.container a{
    text-decoration: none;
    color: white;
}

.current a::after{
    content: '_';
    background-color: white;
    font-size: 4px;
    display: block;
}

.wrapper{
    display: grid;
    grid-template-columns: 82% 18%;
}

/* --- ÉQUATION --- */
.equation{
   font-size: 65px; 
   background-color: white;
   border-radius: 3px;
   text-align: center;
   padding-top: 15%;
   margin: 10px;
}

.equation span{
    display: inline-block;
    padding: 20px;
}

/* --- RÉPONSES --- */
.answer-options{
    font-size: 67px;
    margin-right: 10px;
}

.answer-options button{
    cursor: pointer;
    color: whitesmoke;
    border-radius: 3px;
    margin-top: 10px;
    text-align: center;
    width: 100%;
    border: none;
    padding: 10px 0;
    font-family: 'Luckiest Guy';
    font-size: 67px;
    transition: 1s;
}

/* Bouton 1 */
#option1{
    background-color: #fe4a49;
}
#option1:hover{
    color: #fe4a49;
    background-color: white;
}

/* Bouton 2 */
#option2{
    background-color: #2ab7ca;
}
#option2:hover{
    color: #2ab7ca;
    background-color: white;
}

/* Bouton 3 */
#option3{
    background-color: #fed766;
}
#option3:hover{
    color: #fed766;
    background-color: white;
}