:root {
  color-scheme: light dark;

  --page: #fff5da;
  --bg: #fdf6e3;
  --text: #657b83;
  --h2: #0082c8;
  --h3: #da3175;
  --h4: #139e93;
  --accent: #7a8e21;
  --solar: #f7df9b;
  --solarContrast: #657b83;
  --border: #eee8d5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #002b36;
    --text: #839496;
    --heading: #93a1a1;
    --border: #073642;
  }
}

body.dark {
  --page: #00242d;
  --bg: #002b36;
  --text: #839496;
  --heading: #93a1a1;
  --border: #073642;
  --accent: #9d7220;
  --solar: #0082c8;
  --solarContrast: #002b36;
}

img {
  width: 100%;
}

/* base */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 40px 20px;
  background: var(--page);
  color: var(--text);
  font-family:
    Space Grotesk,
    system-ui,
    sans-serif;
  line-height: 1.6;
}

/* layout */
.container {
  max-width: 720px;
  margin: 0 auto;
}

/* typography */
h1,
h2,
h3 {
  line-height: 1.25;
}

h1 {
  text-align: center;
  margin-top: 2rem;
  font-size: 2rem;
  color: #f7df9b;
}

h2 {
  margin-top: 2rem;
  font-size: 3rem;
  font-weight: bold;
  color: var(--h2);
}

h3 {
  color: var(--h3);
}

h4 {
  color: var(--h4);
}

p {
  margin: 1rem 0;
}

mark {
  background: #f7df9b; /* solarized yellow */
  color: #002b36;
  padding: 2px 4px;
  border-radius: 3px;
}

/* links */
a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* code */
code {
  background: var(--border);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

pre {
  background: var(--border);
  padding: 16px;
  overflow-x: auto;
  border-radius: 6px;
}

/* shared block style (details + toc container) */
details {
  margin: 1rem 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 14px;
  background: var(--bg);
}

summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--h2);
}

summary:hover {
  opacity: 0.8;
}

/* TOC */
#toc {
  font-size: 0.9rem;
}

#toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

#toc li {
  margin: 4px 0;
}
#toc li.h2 {
  margin-left: 10px;
}
#toc li.h3 {
  margin-left: 20px;
}

/* button */

button {
  font-family:
    Space Grotesk,
    system-ui,
    sans-serif;
}

#theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--border);
  color: var(--text);
  border: none;
  padding: 8px 12px;
  cursor: pointer;
  border-radius: 6px;
}

#trickery {
  position: fixed;
  top: 20px;
  left: 20px;
  background: var(--solar);
  color: var(--solarContrast);
  border: none;
  padding: 8px 12px;
  cursor: grab;
  border-radius: 6px;
}

#theme-toggle:hover {
  opacity: 0.8;
}