/* Ask the manual widget. Uses the book's own CSS variables and fonts. No external loads. */
#hvac-ask-trigger {
  position: fixed; bottom: 24px; right: 176px; z-index: 41;
  display: inline-flex; align-items: center; gap: 8px;
  border-radius: 999px; border: 1px solid var(--signal, #3fb6e0);
  background: var(--bg-inset, #101418); color: var(--ink, #e8edf2);
  padding: 10px 16px; cursor: pointer;
  font: 500 14px "IBM Plex Sans", system-ui, sans-serif;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .35);
}
#hvac-ask-trigger b { color: var(--signal, #3fb6e0); font-weight: 600; }
#hvac-ask-trigger:focus-visible, #hvac-ask-panel button:focus-visible,
#hvac-ask-panel textarea:focus-visible, #hvac-ask-panel a:focus-visible {
  outline: 2px solid var(--signal, #3fb6e0); outline-offset: 2px;
}
#hvac-ask-panel[hidden] { display: none; }
#hvac-ask-panel {
  position: fixed; top: 0; right: 0; bottom: 0; width: 420px; z-index: 50;
  background: var(--bg-elevated, #161b21); border-left: 1px solid var(--border-strong, #2c353f);
  display: flex; flex-direction: column; color: var(--ink, #e8edf2);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  box-shadow: -12px 0 40px rgba(0, 0, 0, .45);
}
#hvac-ask-panel header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px; border-bottom: 1px solid var(--border, #232b33);
}
#hvac-ask-panel header .k {
  font: 600 11px "JetBrains Mono", monospace; letter-spacing: .14em;
  color: var(--ink-muted, #94a1ad); text-transform: uppercase;
}
#hvac-ask-panel header .t { font: 600 18px Fraunces, Georgia, serif; margin-top: 2px; }
#hvac-ask-panel header button {
  background: none; border: 1px solid var(--border-strong, #2c353f); color: var(--ink-muted, #94a1ad);
  border-radius: 8px; width: 32px; height: 32px; font-size: 16px; cursor: pointer;
}
#hvac-ask-log {
  flex: 1; overflow: auto; padding: 18px 20px; display: flex; flex-direction: column; gap: 14px;
}
#hvac-ask-log .m-hint { font: 14px/1.6 "IBM Plex Sans", sans-serif; color: var(--ink-muted, #94a1ad); }
#hvac-ask-log .m-q {
  align-self: flex-end; max-width: 85%; background: var(--bg-inset, #101418);
  border: 1px solid var(--border-strong, #2c353f); border-radius: 12px 12px 2px 12px;
  padding: 10px 12px; font-size: 14px; line-height: 1.5; white-space: pre-wrap;
  overflow-wrap: anywhere;
}
#hvac-ask-log .m-a { max-width: 95%; font: 15px/1.6 "Source Serif 4", Georgia, serif; }
#hvac-ask-log .m-a p { margin: 0 0 8px; }
#hvac-ask-log .m-src {
  margin-top: 6px; font: 12px "JetBrains Mono", monospace; color: var(--ink-muted, #94a1ad);
}
#hvac-ask-log .m-src a {
  color: var(--signal, #3fb6e0); text-decoration: none; border-bottom: 1px solid currentColor;
}
#hvac-ask-log .m-think { font: 12px "JetBrains Mono", monospace; color: var(--ink-muted, #94a1ad); }
#hvac-ask-log .m-think::after { content: ""; display: inline-block; width: 1.5em; text-align: left;
  animation: hvac-ask-dots 1.2s steps(4, end) infinite; }
@keyframes hvac-ask-dots { 0% { content: ""; } 25% { content: "."; } 50% { content: ".."; }
  75% { content: "..."; } }
#hvac-ask-log .m-err {
  font: 13px/1.5 "IBM Plex Sans", sans-serif; color: var(--ink, #e8edf2);
  border: 1px solid var(--border-strong, #2c353f); border-left: 3px solid #e5604d;
  border-radius: 6px; padding: 8px 10px; background: var(--bg-inset, #101418);
}
#hvac-ask-form { border-top: 1px solid var(--border, #232b33); padding: 14px 20px 18px; margin: 0; }
#hvac-ask-form .box {
  display: flex; gap: 8px; align-items: flex-end; border: 1px solid var(--border-strong, #2c353f);
  border-radius: 12px; background: var(--bg-inset, #101418); padding: 8px 8px 8px 12px;
}
#hvac-ask-form textarea {
  flex: 1; background: none; border: 0; color: var(--ink, #e8edf2);
  font: 14px "IBM Plex Sans", sans-serif; resize: none; height: 44px; outline: none;
}
#hvac-ask-form button {
  background: var(--signal, #3fb6e0); color: #04121a; border: 0; border-radius: 8px;
  padding: 8px 12px; font: 600 13px "IBM Plex Sans", sans-serif; cursor: pointer;
}
#hvac-ask-form button:disabled { opacity: .5; cursor: default; }
#hvac-ask-form .fine { margin-top: 8px; font: 11px "JetBrains Mono", monospace;
  color: var(--ink-muted, #94a1ad); }
@media (max-width: 640px) {
  #hvac-ask-panel { width: 100%; border-left: 0; }
  #hvac-ask-trigger { right: auto; left: 16px; bottom: 24px; }
}
@media (prefers-reduced-motion: reduce) { #hvac-ask-log .m-think::after { animation: none; } }
@media print { #hvac-ask-trigger, #hvac-ask-panel { display: none !important; } }