.maincontent {
    margin-left: auto;
    margin-right: auto;
    background-color: #242424;
    padding: 25px;
    border: 1px solid aqua;
}

.gridlayout {
    display: flex;
    align-items: center;
    gap: 20px;
}

p, h1, ul, span, input, button, table, select, iframe {
    color: white;
}

button, select, iframe, input {
    background-color: transparent;
    border: 0.5px solid white;
}

@media (min-width: 1000px) {
    .maincontent {
        width: 1000px;
    }
    .headercontent {
        width: 1000px;
    }
    .footercontent {
        width: 1000px;
    }
}

body {
    background-color: #181818;
    font-family: sans-serif;
    color: black
}

.headercontent {
    margin-left: auto;
    margin-right: auto;
    padding: 20px;
    text-align: center;
}

.footercontent {
    margin-left: auto;
    margin-right: auto;
    padding: 20px;
    text-align: center;
}

a:link {
    color: aqua;
}

a:visited {
    color: aqua;
}

a:hover {
    color: mediumvioletred;
}

table {
    border-collapse: collapse;
}

th, td {
    border: 1px solid white;
    font-size: 12px;
    text-align: center;
    padding: 10px 14px;
}

.content {
  display: none;
  overflow: hidden;
}