/* Thomas T. John | Personal Site Stylesheet
   Design philosophy: minimalism
   Updated: March 2026 */

/* ---- Base ---- */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  padding-left: 22em;
  padding-right: 2em;
  max-width: 960px;
  font-family: Georgia, Palatino, serif;
  font-size: 0.95em;
  line-height: 1.6;
  color: black;
  background-color: white;
}

/* ---- Main content area ---- */
#main_body {
  padding-top: 2em;
  text-align: justify;
}

p { background: white; }

/* ---- Callout / showcase box ---- */
.showcase {
  border: thin solid #445566;
  background: #eeeeee;
  padding: 0.6em 1.2em;
  margin: 1em 0;
  width: 90%;
}

/* ---- Code display ---- */
pre {
  white-space: pre-wrap;
  word-wrap: break-word;
  background: #f5f5f5;
  padding: 0.5em;
  border-left: 3px solid #1F497D;
}

/* ---- Headings ---- */
h1 { font-size: 1.5em; margin-bottom: 0.2em; }
h2 { font-size: 1.2em; margin-top: 1.4em; }
h3 { font-size: 1.05em; text-decoration: underline; font-weight: normal; }

/* ---- Hyperlinks ---- */
a { text-decoration: none; }
a:link    { color: black; }
a:visited { color: grey; }
a:focus,
a:hover,
a:active  { color: #1F497D; }

/* ---- Page header ---- */
#header {
  position: relative;
  top: 1em;
  padding: 0.4em 0.2em;
  background: white;
  color: black;
  border-top: 0.2em solid #1F497D;
  border-bottom: 0.9em solid #1F497D;
  margin-bottom: 0.5em;
}

#header h1 {
  margin: 0 0 0.1em 0;
}

#header .subtitle {
  font-size: 0.9em;
  color: #333;
}

/* ---- Footer / address ---- */
address {
  margin-top: 4em;
  padding-top: 0.8em;
  padding-bottom: 0.8em;
  border-top: 0.6em solid #1F497D;
  border-bottom: 0.2em solid #1F497D;
  font-style: normal;
  font-size: 0.88em;
  color: #333;
}

/* ---- Navigation menu (fixed left sidebar) ---- */
ul.main_menu {
  list-style-type: none;
  padding: 0;
  margin: 0;
  position: fixed;
  top: 10em;
  left: 1.5em;
  width: 18em;
}

ul.main_menu li {
  background: white;
  margin: 0.4em 0;
  padding: 0.35em 0.5em;
  border: 0.1em solid #ccc;
  border-right: 0.8em solid #1F497D;
  font-size: 0.92em;
}

ul.main_menu li a {
  display: block;
}

/* ---- Submenu ---- */
ul.sub_main_menu {
  height: 0;
  list-style-type: none;
  overflow: hidden;
  padding-left: 0.5em;
  transition: height 0.2s ease;
}

ul.sub_main_menu li {
  border-top: 0.1em solid #eee;
  border-right: 0;
  font-size: 0.88em;
  padding: 0.2em 0.3em;
}

.open_up_two:hover  ul { height: 5em; }
.open_up_three:hover ul { height: 7.5em; }
.open_up_four:hover  ul { height: 10em; }

/* ---- Responsive fallback (narrow screens) ---- */
@media (max-width: 700px) {
  body {
    padding-left: 1em;
    padding-right: 1em;
  }
  ul.main_menu {
    position: static;
    width: 100%;
    margin-bottom: 1.5em;
  }
  #main_body img {
    float: none;
    display: block;
    margin: 0 auto 16px auto;
  }
}
/* abstract left indent ---- */
p.abstract {
  margin: -8px 0 18px 20px;
  font-size: 0.92em;
  color: #555;
  border-left: 3px solid #ccc;
  padding-left: 12px;
}