:root {
  --text: #0b0c0c;
  --muted: #505a5f;
  --bg: #ffffff;
  --panel: #f3f2f1;
  --border: #b1b4b6;
  --link: #1d70b8;
  --link-visited: #4c2c92;
  --focus: #ffdd00;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --text: #f3f2f1;
    --muted: #b1b4b6;
    --bg: #0b0c0c;
    --panel: #1f2224;
    --border: #505a5f;
    --link: #73b7f0;
    --link-visited: #c4a8f5;
  }
}
* { box-sizing: border-box; }
html { font-size: 112.5%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}
.wrap { max-width: 42rem; margin: 0 auto; padding: 0 1rem; }
main { padding-top: 1.5rem; padding-bottom: 3rem; }
a { color: var(--link); text-underline-offset: 0.15em; }
a:visited { color: var(--link-visited); }
a:hover { text-decoration-thickness: 3px; }
a:focus-visible, button:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 0;
  box-shadow: 0 0 0 6px var(--text);
}
.skip { position: absolute; left: -999rem; }
.skip:focus { position: static; display: block; padding: 0.5rem 1rem; }
h1, h2, h3, h4 { line-height: 1.25; margin: 2rem 0 0.75rem; overflow-wrap: break-word; }
h1 { font-size: 2rem; margin-top: 0.5rem; }
h2 { font-size: 1.45rem; }
h3 { font-size: 1.15rem; }
h4 { font-size: 1rem; }
p, ul, ol { margin: 0 0 1rem; }
li { margin-bottom: 0.25rem; }
img { max-width: 100%; height: auto; }
.video { position: relative; aspect-ratio: 16 / 9; margin-bottom: 1rem; }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.site-header { border-bottom: 1px solid var(--border); background: var(--panel); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.25rem 1.5rem; padding-top: 0.75rem; padding-bottom: 0.75rem; }
.site-name { font-weight: 700; color: var(--text); text-decoration: none; }
.site-name:visited { color: var(--text); }
.site-header ul { list-style: none; display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; margin: 0; padding: 0; }
.site-header li { margin: 0; }
.site-header nav a[aria-current] { font-weight: 700; color: var(--text); }
.site-footer { border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; padding: 1rem 0; }
.site-footer p { margin: 0; }

.crumb { color: var(--muted); font-size: 0.9rem; margin-bottom: 0.25rem; }
.goal { color: var(--muted); }
.years ul { list-style: none; display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; padding: 0; }
.note-list { list-style: none; padding: 0; }
.note-list li { display: grid; grid-template-columns: 5.5rem 1fr; gap: 0.75rem; padding: 0.4rem 0; margin: 0; border-top: 1px solid var(--border); }
.note-list .summary { color: var(--muted); }
.pager { display: flex; justify-content: space-between; gap: 1rem; margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--border); }
.pager .next { margin-left: auto; text-align: right; }
.pager span { display: block; font-size: 0.85rem; color: var(--muted); }

.chat-log { border: 1px solid var(--border); padding: 1rem; min-height: 12rem; margin-bottom: 1rem; }
.chat-log:empty::before { content: "Your conversation will appear here."; color: var(--muted); }
.msg { margin: 0 0 1rem; white-space: pre-wrap; overflow-wrap: break-word; }
.msg .who { display: block; font-weight: 700; font-size: 0.85rem; color: var(--muted); }
.msg.error { color: #d4351c; }
.chat-form label { display: block; font-weight: 700; margin-bottom: 0.25rem; }
.chat-form textarea { width: 100%; font: inherit; padding: 0.5rem; border: 2px solid var(--text); background: var(--bg); color: var(--text); }
.chat-form .row { display: flex; gap: 1rem; align-items: center; margin-top: 0.5rem; }
button { font: inherit; padding: 0.5rem 1rem; border: 0; cursor: pointer; background: #00703c; color: #fff; font-weight: 700; }
button.secondary { background: var(--panel); color: var(--text); border: 1px solid var(--border); font-weight: 400; }
button:disabled { opacity: 0.5; cursor: not-allowed; }
.hint { color: var(--muted); font-size: 0.9rem; }