html {
  font-family: Georgia, serif;
  min-height: 100%;
  height: 100%;
}

.navbar {
  padding: 0.1rem 0;
  margin-bottom: 0;
  margin-top: 0;
  text-align: center;
}

.navbar a {
  margin: 0 0.75rem;
  text-decoration: none;
  color: #115ca1;
  font-size: 0.85rem;
  font-family: Helvetica, Arial, sans-serif;
  text-transform: uppercase;
}

.nav-separator {
  color: #718096;
  font-size: 0.85rem;
}

.navbar a:hover {
  text-decoration: underline;
}


body {
  font-family: Georgia, serif;
  max-width: 920px;
  margin: 0 auto;
  padding: 1rem;
  max-width: 45rem;
  min-height: 100%;
  height: 100%;
  font-size: 1.1rem;
  line-height: 1.7;
  color: #000000;
}

a {
  color: #115ca1;
  text-decoration: underline;
}

a:hover {
  text-decoration: underline;
}

@media (prefers-color-scheme: dark) {
  html { background: #1c1c1c; color: white; }
  a { color: #6bf; }
  a:visited { color: #f8f; }
  a:active { color: red; }
  h1 { color: #e2e8f0; }
  h1 small { color: #a0aec0; }
  h2 { color: #cbd5e0; }
  h3 { color: #cbd5e0; }
  .navbar a { color: #e2e8f0; }
  .navbar a:hover { color: #cbd5e0; }
  .footer-content { color: #718096; }
}

.flex {
  display: flex;
  flex-wrap: wrap;
  padding-bottom: 0;
  padding-top: 0;
  justify-content: center;
}

.no-dot {
  list-style-type: none;
}

header a,
header h1,
header h2,
header h3 {
  margin-block-end: 0px;
  margin-block-start: 0px;
}

.flex-right {
  display: flex;
  margin-left: auto;
  vertical-align: baseline;
}

.pagination li,
header nav li {
  list-style-type: none;
  display: inline-block;
  margin-left: 5px;
}

.subtitle {
  margin-left: 5px;
}

.main,
header,
footer {
  margin-right: 10px;
  margin-left: 10px;
  margin-top: 0;
  margin-bottom: 0;
  display: block;
}

.pad-l-5px {
  padding-left: 5px;
}

.pad-r-5px {
  padding-right: 5px;
}

/* toc */

.toc-box {
  border: 1px solid black;
  padding: 5px;
}

toc {
  display: none;
}

toc li {
  list-style-type: none;
}

toc ul {
  margin-left: 0px;
  padding-left: 0;
}

toc ul ul {
  margin-left: 0px;
  padding-left: 15px;
}

.article-list {
    flex-grow: 1;
}

.article-list .article {
    margin-bottom: 8px;
}

.article-list .date {
  display: block;
}

article {
  margin: 1rem auto 0;
  max-width: 670px;
  color: #000000;
}

article p {
  margin-bottom: 1.5rem;
}

article img {
  max-width: 100%;
  max-height: 60vh;
  width: auto;
  height: auto;
  display: block;
  margin: 2rem auto;
  object-fit: contain;
}

@media (prefers-color-scheme: dark) {
  article { color: #e2e8f0; }
}

heading {
    width: 100%;
    display: block;
}

h1 {
    font-family: Helvetica, Arial, sans-serif;
    font-weight: 700;
    font-size: 2.4em;
    line-height: 1.1em;
    margin-top: 15px;
    margin-bottom: 0;
    text-align: center;
    color: #000000;
}

h1 small {
    display: block;
    font-family: Helvetica, Arial, sans-serif;
    letter-spacing: .04em;
    text-transform: uppercase;
    font-size: 0.75rem;
    font-weight: 400;
    font-style: normal;
    color: #999999;
    margin-top: 5px;
    text-align: center;
}

h2 {
    font-family: Helvetica, Arial, sans-serif;
    font-size: 1.4em;
    font-weight: 700;
    margin: 15px 0 10px;
    line-height: 1.5;
    color: #000000;
}

h3 {
    font-family: Helvetica, Arial, sans-serif;
    letter-spacing: .04em;
    text-transform: uppercase;
    font-size: .9em;
    font-weight: 700;
    margin: 17px 0 10px;
    line-height: 1.4;
    color: #000000;
}

.site-footer {
    margin-top: 2rem;
    padding-top: 1rem;
}

.footer-content {
    text-align: right;
    font-size: 0.9rem;
    color: #718096;
}