body {
    font-family: Arial, Helvetica, sans-serif;
    margin-left: 40px;
    margin-right: 40px;
}

h1, h2{
    text-align: center;
}

h1 a {
    text-decoration: none;
    color: black;
}

h1 button {
    font-size: 2em;
    padding: 10px 50px;
}

.username-password th {
    text-align: right;
    font-weight: normal;
}

.username-password th input, .username-password th button {
    padding: 3px 15px;
}

.login-head, #add-user, #all-users, #recipient-section, #message-section, #files-section {
    border: 1px solid black;
    padding: 10px;
    margin-bottom: 20px;
    min-height: 35px;
}

button {
    padding: 5px 40px;
}

#send-button {
    float: right;
    bottom: 35px;
    position: relative;
}

#recipient-chooser {
    margin-left: 20px;
}

#files-section table, #files-to-download table {
    border-spacing: 5px;
}

#files-section table td, #files-to-download table td {
    padding: 10px 35px;
    background-color: #ddd;
}

#files-to-download table td.table-separator {
    background-color: white;
    padding: 3px;
}

#files-to-download table th {
    padding: 10px 35px;
    background-color: #bbb;
    text-align: right;
    vertical-align: top;
}

#files-to-download button.left-margin {
    margin-left: 40px;
}

#files-to-download a.download-file {
    text-decoration: underline;
}

#files-to-download a.download-file:hover {
    color: red;
}

#files-section table th {
    padding: 10px 35px;
    background-color: #bbb;
    text-align: left;
}

#file-input-button {
    margin-top: 20px;
}

#file-description-section {
    display: flex;
}

#file-description-section #message {
    width: 100%;
    height: 80px;
}

.key-button-div, #key-file {
    display: inline;
}

#key-file {
    margin-left: 40px;
}

.key-button-div {
    margin-left: 10px;
}

#all-users td {
    padding: 5px 20px;
}

#add-user .username-password {
    padding-left: 20px;
}

.login-head-username {
    display: inline;
}

.login-head-logout {
    float: right;
    display: inline;
}

#alert {
    position: absolute;
    left: 30%;
    right: 30%;
    top: 40%;
    bottom: 0;
    display: none;
}

#alert-message {
    border: 1px solid black;
    text-align: center;
    background-color: #ddd;
    padding: 30px;
}

#alert-message button {
    position: absolute;
    top: 10px;
    right: 10px;
}