/* KeplerQuartet.com - Early 2000s inspired, responsive */
* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  font-size: 13px;
  line-height: 1.6;
  color: #333;
  background: #e8e4d9;
}
a { color: #1a4d8f; }
a:visited { color: #5b3a8c; }
a:hover { color: #c44; }
.container { max-width: 820px; margin: 0 auto; padding: 0 16px; }
#header {
  background: #1a2744;
  border-bottom: 3px solid #c49a3c;
  padding: 12px 0 0 0;
  color: #fff;
}
#logo a { color: #f0e6c8; text-decoration: none; font-size: 22px; font-weight: bold; letter-spacing: 1px; font-family: Georgia, 'Times New Roman', serif; }
#tagline { font-size: 11px; color: #b0a888; margin: 2px 0 10px 0; font-style: italic; }
#nav { list-style: none; display: flex; flex-wrap: wrap; gap: 0; margin: 0; padding: 0; }
#nav li a {
  display: block; padding: 6px 12px; color: #d6ceb8; text-decoration: none; font-size: 11px;
  background: #263858; border-right: 1px solid #1a2744;
}
#nav li a:hover { background: #3a5278; color: #fff; }
#content { background: #fff; border: 1px solid #c5bfa7; padding: 20px 24px; margin: 16px 0; min-height: 300px; }
#content h1 { font-family: Georgia, serif; font-size: 22px; color: #1a2744; border-bottom: 2px solid #c49a3c; padding-bottom: 6px; margin-bottom: 14px; }
#content h2 { font-family: Georgia, serif; font-size: 17px; color: #2c4a1e; margin: 18px 0 8px 0; }
#content h3 { font-size: 14px; color: #1a4d8f; margin: 14px 0 6px 0; }
#content p { margin-bottom: 12px; }
#content ul, #content ol { margin: 0 0 12px 24px; }
#content li { margin-bottom: 4px; }
#content img { max-width: 100%; height: auto; }
.breadcrumb { font-size: 11px; color: #777; margin: 10px 0 0 0; }
.breadcrumb a { color: #888; }
#footer { background: #1a2744; color: #9a9478; font-size: 11px; padding: 12px 0; margin-top: 16px; text-align: center; }
#footer a { color: #c49a3c; }
table.data-table { border-collapse: collapse; width: 100%; margin: 12px 0; font-size: 12px; }
table.data-table th { background: #1a2744; color: #fff; padding: 6px 10px; text-align: left; }
table.data-table td { border: 1px solid #ccc; padding: 5px 10px; }
table.data-table tr:nth-child(even) { background: #f4f1ea; }
.infobox { background: #f7f4ec; border: 1px solid #d4c99e; padding: 12px 16px; margin: 14px 0; font-size: 12px; }
.infobox strong { color: #1a2744; }
.pillar-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 16px 0; }
.pillar-card { background: #f7f4ec; border: 1px solid #c5bfa7; padding: 14px; }
.pillar-card h3 { margin-top: 0; font-family: Georgia, serif; font-size: 15px; color: #1a2744; }
.pillar-card ul { margin: 6px 0 0 18px; font-size: 12px; }
.formula { background: #f0ede3; border-left: 3px solid #c49a3c; padding: 10px 14px; margin: 12px 0; font-family: 'Courier New', monospace; font-size: 13px; }
.quiz-q { background: #f7f4ec; border: 1px solid #d4c99e; padding: 10px 14px; margin: 10px 0; }
.ext-link { font-size: 11px; color: #888; }
@media (max-width: 640px) {
  #nav { flex-direction: column; }
  #nav li a { border-right: none; border-bottom: 1px solid #1a2744; }
  .pillar-grid { grid-template-columns: 1fr; }
  #content { padding: 14px 12px; }
  #content h1 { font-size: 18px; }
}