/* Base page styles (applies to all pages) */
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: #0e1117;
  color: #e6edf3;
  line-height: 1.6;
}

/* Sticky top header so navigation stays visible while scrolling */
header {
  border-bottom: 1px solid #30363d;
  background: #0e1117;
  position: sticky;
  top: 0;
}

/* Navigation container */
nav {
  max-width: 900px;
  margin: auto;
  padding: 1rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Navigation links */
nav a {
  color: #e6edf3;
  padding: 0.35rem 0.6rem;
  border-radius: 10px;
  text-decoration: none;
  transition: background 0.2s ease;
}

nav a:hover {
  background: #161b22;
}

/* Active page indicator in the nav */
nav a.active {
  background: #161b22;
  border: 1px solid #30363d;
}

/* Main content width and spacing */
main {
  max-width: 900px;
  margin: auto;
  padding: 3rem 1.5rem;
}

h1 {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

h2 {
  margin-top: 3rem;
}

h3 {
  margin-top: 2rem;
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
  color: #e6edf3;
}

/* Default link style */
a {
  color: #58a6ff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Badge-style tags used in highlights */
.tag {
  display: inline-block;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
  padding: 0.25rem 0.6rem;
  border: 1px solid #30363d;
  border-radius: 999px;
  font-size: 0.85rem;
  color: #8b949e;
}

/* Row layout for the home-page photos */
.photo-row {
  display: flex;
  gap: 2rem;
  margin: 2rem 0;
  flex-wrap: wrap;
}

/* Shared style for each photo */
.photo {
  width: 200px;
  height: auto;
  border-radius: 12px;
  display: block;
}

.photo-row figure {
  margin: 0;
  text-align: center;
}

.photo-row figcaption {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: #9aa5b1;
  font-weight: 500;
}

ul {
  padding-left: 1.2rem;
}

li {
  margin: 0.6rem 0;
}

/* Footer style shared by all pages */
.site-footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid #30363d;
  color: #8b949e;
  font-size: 0.85rem;
  text-align: center;
}