* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;  
  background: #fff;
  color: #333;
}

.layout {
  display: flex;
  min-height: 100vh;
}


/* New margin column */
.side-margin {
  background: #f6f7fb;  /* same as sidebar */
  width: clamp(180px, 10%, 240px);
  flex-shrink: 0;
}

/* Sidebar */
.sidebar {
  width: clamp(180px, 20%, 240px);
  background: #f6f7fb;
  padding: 2em 1em;
  flex-shrink: 0;
  border-right: 1px solid #e1e1e1;
}

.sidebar-logo {
  max-width: 100%;
  margin-bottom: 2em;
}

.sidebar nav ul {
  list-style: none;
}

.sidebar nav ul li {
  margin: 0.8em 0;
}

.sidebar nav ul li a {
  text-decoration: none;
  color: #0050b3;
  font-weight: 500;
}

.sidebar nav ul li a.active,
.sidebar nav ul li a:hover {
  color: #1d4ed8;
}

/* Content */
.content {
  flex: 1;
  padding: 2em 3em;
  max-width: 720px;      /* <-- limit width */
  margin: 0 auto;        /* <-- center horizontally */
}
.top-header {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 2em;
}

.github-link a {
  text-decoration: none;
  color: #1d4ed8;
  font-weight: 500;
}

.hero h1 {
  font-size: 2em;
  margin-bottom: 0.5em;
}

.hero p {
  font-size: 1.1em;
  margin-bottom: 1em;
}

.cta-button {
  background: #f9fafb;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 0.6em 1em;
  color: #1d4ed8;
  text-decoration: none;
  font-weight: 500;
  display: inline-block;
}

.cta-button:hover {
  background: #e5efff;
}

.about {
  margin-top: 2em;
  line-height: 1.6;
}

.about h2 {
  font-size: 1.4em;
  margin-bottom: 0.6em;
}

.about a {
  color: #1d4ed8;
  text-decoration: none;
}

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

hr {
  margin: 2em 0;
  border: none;
  border-top: 1px solid #eee;
}

.people {
  margin-top: 3em;
}

.people h2 {
  font-size: 1.8em;
  margin-bottom: 0.5em;
}

.people h3 {
  font-size: 1.4em;
  margin-top: 2em;
  color: #1d4ed8;
}

.people-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr); /* 3 per row */
  gap: 2em;
  margin-top: 1em;
}

@media (max-width: 900px) {
  .people-grid {
    grid-template-columns: repeat(2, 1fr); /* 2 per row on tablets */
  }
}

@media (max-width: 600px) {
  .people-grid {
    grid-template-columns: 1fr; /* 1 per row on phones */
  }
}


.person {
  text-align: center;
}

.person img {
  width: 100%;
  max-width: 150px;
  border-radius: 6px;
  margin-bottom: 0.5em;
}

.person h4 {
  margin: 0.3em 0 0.1em;
  font-size: 1.1em;
}

.person p {
  margin: 0;
  font-size: 0.95em;
  color: #555;
}

.person a {
  text-decoration: none;
  color: inherit;
}
.overview {
  margin-top: 2em;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.overview-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  margin-bottom: 2em;
  overflow: hidden;
  margin-bottom: 2.5em; /* space below each table */
}

.overview-table td {
  padding: 1em 1.2em;
  border-top: 1px solid #eee;
  vertical-align: top;
}

.overview-table td:first-child {
  font-weight: bold;
  width: 200px;
  white-space: nowrap;
  color: #444;
  background: #f9f9f9;
}

.overview-table tr:first-child td {
  border-top: none;
}

.overview h2 {
  margin-top: 2em;
  margin-bottom: 0.6em;
  font-size: 1.4em;
  color: #1a1a1a;
}


.overview h2 {
  margin-top: 2em;
  margin-bottom: 0.6em;
  font-size: 1.4em;
}

.pub-list {
  list-style: none;
  padding: 0;
}

.pub-list li {
  margin-top: 1em;
  border-bottom: 1px solid #eee;
  padding-bottom: 1em;
  line-height: 1.6;       /* line spacing within each entry */
}

/* Hide by default on desktop */
.mobile-nav {
  display: none;
  padding: 1em;
  background: #f0f0f0;
  border-bottom: 1px solid #ddd;
}
#nav-toggle {
  display: none;
}

.nav-toggle-label {
  font-size: 1.4em;
  cursor: pointer;
}

.dropdown-nav {
  display: none;
  margin-top: 0.5em;
}

#nav-toggle:checked + .nav-toggle-label + .dropdown-nav {
  display: block;
}

.dropdown-nav ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.dropdown-nav ul li {
  margin: 0.5em 0;
}

.dropdown-nav ul li a {
  text-decoration: none;
  color: #1d4ed8;
}

/* On mobile: hide sidebar, show dropdown */
@media (max-width: 768px) {
  .side-margin {
    display: none !important;
  }
  .sidebar {
    display: none;
  }
  .mobile-nav {
    display: block;
  }
  .content {
    padding: 2em 1em;
  }
}