.digibib-chat {
  --digibib-accent: #7a2e1d;
  --digibib-bg: #ffffff;
  --digibib-muted: #6b6b6b;
  --digibib-user-bg: #f3ece6;
  --digibib-border: #ddd3cb;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  max-width: 100%;
  height: var(--digibib-height, 600px);
  border: 1px solid var(--digibib-border);
  border-radius: 8px;
  background: var(--digibib-bg);
  font-size: 16px;
  line-height: 1.5;
  overflow: hidden;
}
.digibib-chat *, .digibib-chat *::before, .digibib-chat *::after { box-sizing: border-box; }
.digibib-header {
  padding: 10px 14px;
  background: var(--digibib-accent);
  color: #fff;
  font-weight: 600;
}
.digibib-log { flex: 1; overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 10px; }
.digibib-msg { max-width: 92%; padding: 8px 12px; border-radius: 8px; word-wrap: break-word; }
.digibib-msg p { margin: 0 0 .6em; }
.digibib-msg p:last-child { margin-bottom: 0; }
.digibib-user { align-self: flex-end; background: var(--digibib-user-bg); white-space: pre-wrap; }
.digibib-bot { align-self: flex-start; border: 1px solid var(--digibib-border); }
.digibib-pending .digibib-body { color: var(--digibib-muted); font-style: italic; }
.digibib-error { border-color: #c0392b; color: #c0392b; }
.digibib-ref {
  display: inline-block;
  min-width: 1.4em;
  margin: 0 1px;
  padding: 0 4px;
  border-radius: 4px;
  background: var(--digibib-user-bg);
  color: var(--digibib-accent);
  font-size: .75em;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  vertical-align: super;
  line-height: 1.4;
}
a.digibib-ref:hover { background: var(--digibib-accent); color: #fff; }
.digibib-sources { margin-top: 8px; font-size: .9em; }
.digibib-sources summary { cursor: pointer; color: var(--digibib-accent); }
.digibib-sources ol { list-style: none; padding: 0; margin: 6px 0 0; }
.digibib-sources li { margin-bottom: 8px; }
.digibib-sources a { color: var(--digibib-accent); }
.digibib-sources blockquote {
  margin: 4px 0 0;
  padding-left: 8px;
  border-left: 3px solid var(--digibib-border);
  color: var(--digibib-muted);
  font-size: .9em;
}
.digibib-form { display: flex; gap: 8px; padding: 10px; border-top: 1px solid var(--digibib-border); }
.digibib-form textarea {
  flex: 1;
  min-width: 0;
  resize: none;
  padding: 8px;
  border: 1px solid var(--digibib-border);
  border-radius: 6px;
  font: inherit;
}
.digibib-form button {
  padding: 0 16px;
  border: 0;
  border-radius: 6px;
  background: var(--digibib-accent);
  color: #fff;
  font: inherit;
  cursor: pointer;
}
.digibib-form button:disabled { opacity: .5; cursor: wait; }
.digibib-note { padding: 0 12px 8px; color: var(--digibib-muted); font-size: .75em; }
@media (max-width: 480px) {
  .digibib-chat { height: var(--digibib-height-mobile, 75vh); }
  .digibib-msg { max-width: 100%; }
}