side by side divs evenly spaced

by greatCar

HTML

<div id="flex-container">
        <div class="flex-item"></div>
    
        <div class="flex-item"></div>
    </div>

CSS

#flex-container {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    width: 500px;
    border: 1px black solid;
    margin: 0 auto;
}

.flex-item {
    width: 150px;
    height: 200px;
    border: 1px black solid;
    background: #369;
}