* {
    box-sizing: border-box;
}

body {
    width: 1000px;
    margin: auto;
}

nav {
    background: black;
    display: flex;
    justify-content: space-around;
    margin-bottom: 30px;
}

nav a {
    color: white;
    text-decoration: none;
    display: inline-block;
    padding: 10px;
}

nav a:hover {
    color: #aaf;
}

.column {
    display: inline-flex;
    flex-direction: column;
}

.flow {
    display: flex;
    flex-flow: row wrap;
    justify-content: space-between;
}

.column > *,
.flow > * {
    box-shadow: 0 0 10px black;
    padding: 20px;
    border-radius: 20px;
    margin: 20px;
}

.form {
    display: grid;
    grid-template-columns: repeat(2, auto);
}

.form label {
    font-weight: bold;
}

.question {
    font-weight: bold;
}

.reponse {
    padding: 20px;
    text-align: center;
}