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

:root {
  --bg: #fff;
  --fg: #000;
  --link: #00e;
  --link-visited: #551a8b;
  --code-bg: #f5f5f5;
  --muted: #666;
}

@media screen and (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1a1a1a;
    --fg: #e0e0e0;
    --link: #6cf;
    --link-visited: #c9f;
    --code-bg: #2a2a2a;
    --muted: #999;
  }
}

@media screen {
  :root[data-theme="dark"] {
    --bg: #1a1a1a;
    --fg: #e0e0e0;
    --link: #6cf;
    --link-visited: #c9f;
    --code-bg: #2a2a2a;
    --muted: #999;
  }
}

:root[data-theme="light"] {
  --bg: #fff;
  --fg: #000;
  --link: #00e;
  --link-visited: #551a8b;
  --code-bg: #f5f5f5;
  --muted: #666;
}

body {
  font-family: monospace;
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  max-width: 70ch;
  margin: 2rem auto;
  padding: 0 1rem;
}

nav {
  margin-bottom: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

nav ul {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 0.25rem;
}

nav li {
  margin: 0;
}

nav li:not(:last-child)::after {
  content: "|";
  margin-left: 0.25rem;
}

nav a {
  color: var(--fg);
}

nav a.active {
  font-weight: bold;
}

.theme-toggle {
  margin-left: auto;
  background: none;
  border: 1px solid var(--fg);
  color: var(--fg);
  padding: 0.25rem 0.5rem;
  font-family: monospace;
  font-size: 0.875rem;
  cursor: pointer;
}

.theme-toggle:hover {
  background: var(--fg);
  color: var(--bg);
}

a {
  color: var(--link);
  text-decoration: underline;
}

a:visited {
  color: var(--link-visited);
}

a:hover {
  color: var(--link);
}

h1, h2, h3, h4, h5, h6 {
  margin: 1.5rem 0 0.5rem;
  line-height: 1.3;
}

h1 {
  font-size: 1.5rem;
}

h2 {
  font-size: 1.25rem;
}

h3 {
  font-size: 1.1rem;
}

p {
  margin: 1rem 0;
}

ul, ol {
  margin: 1rem 0;
  padding-left: 2rem;
}

li {
  margin: 0.25rem 0;
}

pre {
  background: var(--code-bg);
  padding: 1rem;
  overflow-x: auto;
  margin: 1rem 0;
}

code {
  background: var(--code-bg);
  padding: 0.2rem 0.4rem;
}

pre code {
  padding: 0;
}

time {
  color: var(--muted);
}

.photo-swap {
  position: relative;
  width: 300px;
  height: 300px;
  margin: 0 auto 1rem;
}

.photo {
  position: absolute;
  width: 300px;
  height: 300px;
  object-fit: cover;
  border-radius: 50%;
}

.photo-1 {
  animation: crossfade 6s infinite;
}

.photo-2 {
  animation: crossfade 6s infinite -3s;
}

@keyframes crossfade {
  0%, 40% { opacity: 1; }
  50%, 90% { opacity: 0; }
  100% { opacity: 1; }
}

@media print {
  nav, .theme-toggle, .print-hide, .photo-swap {
    display: none !important;
  }

  body {
    font-size: 11pt;
    max-width: none;
    margin: 0;
    padding: 0;
  }
}