/* ===========================================================================
   AB Groundwork — "Ask AB" on-site assistant
   A non-modal dialog. It never traps the page, never auto-opens, and stays
   fully operable from the keyboard. See docs/AI-ASSISTANT.md.
   =========================================================================== */

.ab-assistant {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 950;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.75rem;
  font-family: var(--ab-sans);
}

/* --- Launcher ------------------------------------------------------------ */

.ab-assistant-launcher {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 52px;
  padding: 0.75rem 1.25rem 0.75rem 0.85rem;
  border: 0;
  border-radius: var(--ab-radius-pill);
  background: var(--ab-green);
  color: var(--ab-white);
  font-size: var(--ab-t-small);
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--ab-shadow-lg);
  transition: transform var(--ab-dur) var(--ab-ease),
              background var(--ab-dur) var(--ab-ease);
}

.ab-assistant-launcher:hover { background: var(--ab-green-600); transform: translateY(-2px); }
.ab-assistant-launcher:focus-visible { outline: 3px solid var(--ab-ember); outline-offset: 3px; }

.ab-assistant-launcher .spark {
  display: grid;
  place-items: center;
  flex: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--ab-orange);
  color: var(--ab-on-orange);
}

.ab-assistant-launcher .spark svg { width: 17px; height: 17px; }

.ab-assistant[data-open="true"] .ab-assistant-launcher .label { display: none; }
.ab-assistant[data-open="true"] .ab-assistant-launcher { padding: 0.75rem 0.85rem; }

/* --- Panel --------------------------------------------------------------- */

.ab-assistant-panel {
  display: none;
  flex-direction: column;
  width: min(392px, calc(100vw - 2rem));
  height: min(600px, calc(100dvh - 7rem));
  border: 1px solid var(--ab-line);
  border-radius: var(--ab-radius-lg);
  background: var(--ab-paper);
  box-shadow: var(--ab-shadow-lg);
  overflow: hidden;
}

.ab-assistant[data-open="true"] .ab-assistant-panel {
  display: flex;
  animation: ab-panel-in 0.22s var(--ab-ease) both;
}

@keyframes ab-panel-in {
  from { opacity: 0; transform: translateY(12px) scale(0.985); }
  to { opacity: 1; transform: none; }
}

.ab-assistant-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1rem;
  background: var(--ab-green);
  color: var(--ab-white);
}

.ab-assistant-head .mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--ab-orange);
  color: var(--ab-on-orange);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.ab-assistant-head .title { flex: 1; min-width: 0; }
.ab-assistant-head .title b { display: block; font-size: var(--ab-t-small); font-weight: 600; }

.ab-assistant-head .title span {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.6875rem;
  color: var(--ab-on-dark-dim);
}

.ab-assistant-head .title span::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ab-amber);
}

.ab-assistant-close {
  flex: none;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  background: transparent;
  color: var(--ab-white);
  font-size: 1rem;
  cursor: pointer;
}

.ab-assistant-close:hover { background: rgba(255, 255, 255, 0.14); }
.ab-assistant-close:focus-visible { outline: 3px solid var(--ab-amber); outline-offset: 2px; }

/* --- Message log --------------------------------------------------------- */

.ab-assistant-log {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  scrollbar-width: thin;
}

.ab-msg { max-width: 88%; font-size: var(--ab-t-small); line-height: 1.6; }

.ab-msg .bubble {
  padding: 0.7rem 0.9rem;
  border-radius: 14px;
  overflow-wrap: anywhere;
}

.ab-msg .bubble p { margin: 0 0 0.6em; }
.ab-msg .bubble p:last-child { margin-bottom: 0; }
.ab-msg .bubble ul { margin: 0.4em 0; padding-left: 1.1rem; }
.ab-msg .bubble li { margin-bottom: 0.25em; }
.ab-msg .bubble a { color: inherit; box-shadow: inset 0 -1px currentColor; font-weight: 600; }

.ab-msg[data-role="bot"] .bubble {
  background: var(--ab-white);
  border: 1px solid var(--ab-line);
  border-bottom-left-radius: 4px;
  color: var(--ab-green);
}

.ab-msg[data-role="user"] {
  align-self: flex-end;
  max-width: 82%;
}

.ab-msg[data-role="user"] .bubble {
  background: var(--ab-green);
  color: var(--ab-white);
  border-bottom-right-radius: 4px;
}

.ab-msg[data-role="system"] {
  max-width: 100%;
  text-align: center;
  font-size: 0.6875rem;
  color: var(--ab-sage);
}

.ab-msg .meta {
  margin-top: 0.35rem;
  font-size: 0.625rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ab-sage);
}

/* Typing indicator */
.ab-typing { display: inline-flex; gap: 4px; padding: 0.35rem 0; }

.ab-typing i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ab-signal);
  animation: ab-blink 1.1s infinite ease-in-out;
}

.ab-typing i:nth-child(2) { animation-delay: 0.16s; }
.ab-typing i:nth-child(3) { animation-delay: 0.32s; }

@keyframes ab-blink {
  0%, 80%, 100% { opacity: 0.25; transform: translateY(0); }
  40% { opacity: 1; transform: translateY(-3px); }
}

/* --- Suggested prompts --------------------------------------------------- */

.ab-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0 1rem 0.75rem;
}

.ab-suggestions:empty { display: none; }

.ab-suggestions button {
  padding: 0.5rem 0.8rem;
  min-height: 36px;
  border: 1px solid var(--ab-line);
  border-radius: var(--ab-radius-pill);
  background: var(--ab-white);
  color: var(--ab-green);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--ab-dur) var(--ab-ease), background var(--ab-dur) var(--ab-ease);
}

.ab-suggestions button:hover { border-color: var(--ab-signal); background: var(--ab-mist); }

/* --- Composer ------------------------------------------------------------ */

.ab-assistant-form {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  padding: 0.75rem;
  border-top: 1px solid var(--ab-line);
  background: var(--ab-white);
}

.ab-assistant-form textarea {
  flex: 1;
  min-height: 44px;
  max-height: 120px;
  padding: 0.65rem 0.8rem;
  border: 1px solid var(--ab-line);
  border-radius: 12px;
  background: var(--ab-paper);
  color: var(--ab-green);
  font-size: var(--ab-t-small);
  line-height: 1.5;
  resize: none;
}

.ab-assistant-form textarea:focus {
  border-color: var(--ab-signal);
  box-shadow: 0 0 0 3px rgba(46, 125, 91, 0.16);
  outline: none;
}

.ab-assistant-send {
  flex: none;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 12px;
  background: var(--ab-orange);
  color: var(--ab-on-orange);
  cursor: pointer;
  transition: background var(--ab-dur) var(--ab-ease);
}

.ab-assistant-send:hover { background: var(--ab-orange-600); }
.ab-assistant-send[disabled] { opacity: 0.45; cursor: not-allowed; }
.ab-assistant-send svg { width: 19px; height: 19px; }

.ab-assistant-foot {
  padding: 0 1rem 0.8rem;
  background: var(--ab-white);
  font-size: 0.625rem;
  line-height: 1.6;
  color: var(--ab-sage);
  text-align: center;
}

.ab-assistant-foot a { color: var(--ab-ember); box-shadow: inset 0 -1px currentColor; }

/* --- Small screens ------------------------------------------------------- */

@media (max-width: 560px) {
  .ab-assistant { left: max(0.75rem, env(safe-area-inset-left)); right: max(0.75rem, env(safe-area-inset-right)); }

  .ab-assistant-panel {
    width: 100%;
    height: min(78dvh, 560px);
  }

  .ab-assistant-launcher { align-self: flex-end; }
  .ab-assistant-launcher .label { display: none; }
  .ab-assistant-launcher { padding: 0.75rem; }
}

/* Keep the launcher clear of the WordPress admin bar on small screens. */
body.admin-bar .ab-assistant { bottom: max(1rem, env(safe-area-inset-bottom)); }