body {
    background-color: lightyellow;
    margin: 0;
    font-family: Arial, sans-serif;
}

header {
    background-color: #f8f8f8;
    text-align: center;
    padding: 20px;
}

.container {
    display: flex;
    justify-content: space-between;
}

.column {
    width: 100%;
}

.left {
    flex: 25%;
    padding: 15px;
}

.middle {
    flex: 50%;
    padding: 15px;
}

.right {
    flex: 25%;
    padding: 15px;
}

.column a img {
    width: 100%;
    margin-bottom: 20px;
}