/* ---- common style ----- */

* {
    font-family: sans-serif;
}
body {
    text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
}
.maincontent {
    border: 2px solid black;
    margin: -2px auto 0 auto;
    padding: 1em;
    position: relative;
    z-index: 0;
    background-color: white;
    max-width: 50em;
    text-align: justify;
}
/* banner */
.banner {
    width: 150px;
}
/* contents */
header {
    text-align: center;
}
h2 {
    border-bottom: 1px solid gray;
}
h2, h3 {
    border-left: 6px solid gray;
    padding-left: 12px;
}
p {
    text-indent: 1em;
}
/* message box */
.message {
    padding: 0.7em 1.6em;
    border-radius: 0.7em;
    margin: 0.7em;
}
.message-notice {
    border: 2px solid rgb(193, 18, 18);
}
.message-info {
    background-color: rgb(201, 241, 239);
}