body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: url("20201126_154651_lc.png") no-repeat center center fixed;
    background-size: cover;
    position: relative;
}

header {
    width: 1240px;
    margin: 0 auto;
    background-color: black;
    color: white;
    padding: 40px;
    display: flex;
    align-items: center;
    position: relative;
    z-index: 2;
}

.logo img {
    max-height: 50px;
    margin-right: 20px;
}

h1 {
    margin: 0;
    font-size: 36px;
}

main {
    width: 1280px;
    margin: 0 auto;
    background-color: rgba(255, 255, 255, 0.8);
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 1;
    /* Add the following style to ensure the footer appears below */
    overflow: auto;
}

.main-body {
    background-color: black;
    color: white;
    padding: 20px;
    margin-bottom: 20px;
}

/* Add the following style for link color */
a {
    color: #7AC142;
}

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

.column {
    flex: 0 0 30%;
    background-color: #333333;
    color: white;
    padding: 10px;
    margin-right: 10px;
}

footer {
    background-color: black;
    color: white;
    text-align: center;
    padding: 10px;
    /* Remove position: fixed; and width: 100%; */
    bottom: 0;
}