body {
    transition: background-color 0.2s ease-in-out;
    background-color: #004D84;
    font-family: "Verdana", "Arial", sans-serif;
    color: #000000;
    margin: 0;
    padding: 10px;
    font-size: 12px;
}
.dark-mode {
    background-color: #00355B;
}
.container {
    width: 900px;
    margin: 0 auto;
    background-color: #ffffff;
}

.top-nav {
    transition: background-color 0.2s ease-in-out;
    display: flex;
    justify-content: center;
    background: #6e99c9;
    padding: 10px;
    border-top: 1px solid #7BACE0;
    border-bottom: 1px solid #5D84AA;
}
.dark-mode a {
    color: #87BDFF;
}
.dark-mode a:visited {
    color: #A268FF;
}
.top-nav a, button {
    font-family: "Verdana", "Arial", sans-serif;
    transition: font-size 0.2s ease-in-out, background 0.2s ease-in-out;
    color: #ffffff;
    padding: 3px 7px;
    margin: 0 0;
    background: #ffffff00;
    border: 0;
    font-size: 14px;
    font-weight: bold;
    border-radius: 4px;
}
.top-nav a:visited {
    color: #ffffff;
}

.top-nav a:hover, .top-nav button:hover {
    cursor: pointer;
    background: #5D84AA;
    font-size: 20px;
}

.top-nav button {
    align-self: flex-start;
}

a {
    text-decoration: none;
}
.content {
    display: table-cell;
    vertical-align: top;
    padding: 15px;
    background: white;
}

.container, .content {
    transition: color 0.2s ease-in-out, background-color 0.2s ease-in-out;
}
.dark-mode .container, .dark-mode .content {
    background-color: #2B4351;
    color: #FFFFFF;
}
.dark-mode .top-nav {
    background-color: #476582;
    border-top: 1px solid #476582;
    border-bottom: 1px solid #476582;
}