:root {
  --ink: #1b2420;
  --paper: #f6f1e8;
  --pine: #2f4f3e;
  --pine-dark: #1e3329;
  --sand: #e6d8c3;
  --rule: #cbbda8;
  --accent: #b4532a;
  --white: #fffcf7;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
}
a { color: var(--pine); }
a:hover { color: var(--accent); }
.banner {
  background: #5c2e1a;
  color: #fff8ee;
  text-align: center;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  padding: 0.45rem 1rem;
}
header {
  background: var(--pine-dark);
  color: var(--paper);
  padding: 1.25rem 1.5rem 1rem;
}
header h1 {
  margin: 0;
  font-size: 1.6rem;
  font-weight: normal;
}
header p { margin: 0.25rem 0 0; opacity: 0.85; }
nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
  background: var(--pine);
}
nav a { color: var(--paper); text-decoration: none; font-family: Arial, Helvetica, sans-serif; font-size: 0.95rem; }
nav a:hover { text-decoration: underline; color: var(--sand); }
main { max-width: 42rem; margin: 0 auto; padding: 2rem 1.5rem 4rem; }
h2 { font-weight: normal; color: var(--pine-dark); }
.card {
  background: var(--white);
  border: 1px solid var(--rule);
  padding: 1rem 1.15rem;
  margin: 1rem 0;
}
footer {
  border-top: 1px solid var(--rule);
  padding: 1.5rem;
  font-size: 0.9rem;
  color: #4a4338;
  text-align: center;
}
.chat {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  width: min(22rem, calc(100vw - 2rem));
  background: var(--white);
  border: 1px solid var(--rule);
  box-shadow: 0 8px 24px rgba(27, 36, 32, 0.18);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 0.9rem;
}
.chat h3 {
  margin: 0;
  padding: 0.65rem 0.85rem;
  background: var(--pine-dark);
  color: var(--paper);
  font-size: 0.95rem;
  font-weight: normal;
}
.chat-log {
  max-height: 14rem;
  overflow-y: auto;
  padding: 0.75rem;
  white-space: pre-wrap;
}
.chat form { display: flex; gap: 0.35rem; padding: 0.5rem; border-top: 1px solid var(--rule); }
.chat input {
  flex: 1;
  padding: 0.45rem;
  border: 1px solid var(--rule);
  font: inherit;
}
.chat button {
  background: var(--accent);
  color: white;
  border: 0;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
}
.cite { font-size: 0.8rem; color: var(--pine); }