body {
    max-width: 720px;
    margin: auto;
    line-height: 1.5em;
    /* force vertical scrollbar to prevent horizontal jumps when switching between short and long pages */
    overflow-y: scroll;
}

/* menu */
.menu li {
    display: inline-block;
    margin-top: 2px;
    margin-bottom: 2px;
}

.menu a {
    text-decoration: none;
    color: black;

    padding-top: 2px;
    padding-bottom: 2px;
    padding-left: 5px;
    padding-right: 5px;

    border-radius: 5px;
    border-width: 2px;
    border-style: solid;
    border-color: transparent;
}

/* main text */
.main-block, header, footer {
    background: #fff;
    padding-top: 1%;
    padding-bottom: 1%;
    padding-left: 8%;
    padding-right: 8%;
}

/* footer */
footer {
    padding-top: 5%;
    text-align: center;
    color: gray;
}

/* logos */
.responsive {
    max-width: 100%;
    height: auto;
}

header img {
    display: block;
    margin-right: auto;
}

footer img {
    display: block;
    margin-left: auto;
}

/* partner */
.partner-name {
    float: left;
    vertical-align: middle;
}

.partner-logo {
    float: right;
}

.partner:after {
    content: '';
    display: block;
    clear: both;
    margin-bottom: 2%;
}