:root {
    --primary-color: #F4F1DE;
    --secondary-color: #E07A5F;
    --third-color: #3D405B;
    --fourth-color: #81B29A;
    --fifth-color: #F2CC8F;
    --shadow:  0.1rem 0.2rem 0.2rem #000000;
}

*, 
*::before, 
*::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html, 
body {
    height: 100%;
    background-color: var(--third-color);
    font-family: Arial, Helvetica, sans-serif;
}

h1{
    text-align: center;
    color: var(--primary-color);
    font-size: 3rem;
}

p{
    font-size: 1.3rem;
}

#container{
    padding: 5rem;
    margin: auto;
}

#quiz-container{
    background-color: var(--primary-color);
    max-width: 800px;
    margin: auto;
    margin-top: 3rem;
    border-radius: 0.2rem;
    box-shadow: var(--shadow);
    min-height: 500px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

#quiz-header{
    padding: 2rem;
    display: flex;
    justify-content:space-between;
}

#quiz-body{
    border-top: 2px solid grey;
    border-bottom: 2px solid grey;
    flex: 1;
    padding: 2rem;
    display: flex;
    flex-direction: column
}

#quiz-body h2{
   margin-bottom: 1.5rem;
}

.answer-btn{
    width: 100%;
    text-align: left;
    margin-bottom: 1.2rem;
    padding: 1rem;
    cursor: pointer;
    background-color: var(--fifth-color);
    font-size: 1rem;
}

.operation-btn{
    padding: 1rem;
    cursor: pointer;
    background-color: var(--fifth-color);
}

.operation-btn:hover{
    background-color: var(--third-color);
    color: white;
}

.answer-btn:hover{
    background-color: var(--third-color);
    color: white;
}

#quiz-footer{
    padding: 1rem 2rem;
    display: flex;
    justify-content:space-between;
    align-items: center;
}

.hide{
    display: none;
}

.show{
    display: block;
}

.correct, .correct:hover, .correct:focus, .correct:visited{
    color: white;
    background-color: var(--fourth-color);
}

.wrong, .wrong:hover, .wrong:focus, .wrong:visited{
    color: white;
    background-color: var(--secondary-color);
}