/* ── Minty help chat (WS2) ──────────────────────────────────────────
   One floating button plus a chat window. Inside the app shell the button sits
   above the phone tab bar through WS1's layout variable (PLAN §4 I10):
   bottom: var(--sm-fab-bottom, 24px). Colours come from the I12 tokens; each
   fallback is that token's value, because a few pages load this file first. */
.minty-chat-fab {
  position: fixed;
  right: 24px;
  bottom: var(--sm-fab-bottom, 24px);
  z-index: 9998;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  min-width: 44px;
  padding: 0 16px 0 12px;
  border: 1px solid var(--sm-line, #e7e4dc);
  border-radius: 999px;
  background: var(--sm-surface, #fff);
  color: var(--sm-accent, #145c32);
  box-shadow: var(--sm-shadow-pop, 0 4px 12px rgba(17,21,18,.08), 0 24px 48px rgba(17,21,18,.12));
  font: 600 14px/1 var(--sm-font-body, system-ui, -apple-system, "Segoe UI", sans-serif);
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.minty-chat-fab:hover { transform: translateY(-1px); border-color: color-mix(in srgb, var(--sm-accent, #145c32) 35%, var(--sm-line, #e7e4dc)); }
.minty-chat-fab:focus-visible { outline: 2px solid var(--sm-accent, #145c32); outline-offset: 3px; }
.minty-chat-fab svg { width: 20px; height: 20px; flex: 0 0 auto; }
.minty-chat-fab .minty-fab-label { color: var(--sm-ink, #111512); }
.minty-chat-fab[aria-expanded="true"] { border-color: var(--sm-accent, #145c32); }

/* ── Window ───────────────────────────────────────────────────────── */
.minty-chat-window {
  position: fixed;
  right: 24px;
  bottom: calc(var(--sm-fab-bottom, 24px) + 56px);
  z-index: 9999;
  display: none;
  flex-direction: column;
  width: 368px;
  max-height: min(540px, calc(100vh - var(--sm-fab-bottom, 24px) - 88px));
  overflow: hidden;
  border: 1px solid var(--sm-line, #e7e4dc);
  border-radius: 16px;
  background: var(--sm-surface, #fff);
  color: var(--sm-ink, #111512);
  box-shadow: var(--sm-shadow-pop, 0 4px 12px rgba(17,21,18,.08), 0 24px 48px rgba(17,21,18,.12));
  font-family: var(--sm-font-body, system-ui, -apple-system, "Segoe UI", sans-serif);
}
.minty-chat-window.open { display: flex; }

.minty-chat-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 14px 12px 16px;
  border-bottom: 1px solid var(--sm-line, #e7e4dc);
}
.minty-chat-avatar {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--sm-mint-soft, #e6f3e9);
  color: var(--sm-accent, #145c32);
}
.minty-chat-avatar svg { width: 18px; height: 18px; }
.minty-chat-title { flex: 1; min-width: 0; }
.minty-chat-title strong { display: block; color: var(--sm-ink, #111512); font: 600 15px/1.2 var(--sm-font-display, "Space Grotesk", system-ui, sans-serif); }
.minty-chat-title span { display: block; margin-top: 2px; color: var(--sm-muted, #5f6f64); font-size: 12.5px; }
.minty-chat-close {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: none;
  color: var(--sm-muted, #5f6f64);
  cursor: pointer;
}
.minty-chat-close:hover { background: var(--sm-mint-soft, #e6f3e9); color: var(--sm-ink, #111512); }
.minty-chat-close:focus-visible { outline: 2px solid var(--sm-accent, #145c32); outline-offset: 1px; }
.minty-chat-close svg { width: 18px; height: 18px; }

/* Messages */
.minty-chat-messages {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 10px;
  min-height: 180px;
  overflow-y: auto;
  padding: 16px;
  background: var(--sm-paper, #faf8f3);
}
.minty-msg {
  max-width: 86%;
  padding: 10px 13px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}
.minty-msg.bot {
  align-self: flex-start;
  border: 1px solid var(--sm-line, #e7e4dc);
  border-bottom-left-radius: 4px;
  background: var(--sm-surface, #fff);
  color: var(--sm-ink, #111512);
}
.minty-msg.user {
  align-self: flex-end;
  border-bottom-right-radius: 4px;
  background: var(--sm-accent, #145c32);
  color: var(--sm-on-accent, #fff);
}
.minty-msg.typing { color: var(--sm-muted, #5f6f64); font-style: italic; }
.minty-msg.error { border-color: color-mix(in srgb, var(--sm-danger, #b42318) 30%, var(--sm-line, #e7e4dc)); background: var(--sm-danger-soft, #fdecea); color: var(--sm-danger, #b42318); }
.minty-msg a { color: inherit; font-weight: 600; }

/* Starter questions */
.minty-chat-starters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 16px 12px;
  background: var(--sm-paper, #faf8f3);
}
.minty-starter {
  padding: 7px 11px;
  border: 1px solid var(--sm-line, #e7e4dc);
  border-radius: 999px;
  background: var(--sm-surface, #fff);
  color: var(--sm-ink-2, #4a524c);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 500;
  line-height: 1.25;
  text-align: left;
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease;
}
.minty-starter:hover { border-color: color-mix(in srgb, var(--sm-accent, #145c32) 40%, var(--sm-line, #e7e4dc)); color: var(--sm-ink, #111512); }
.minty-starter:focus-visible { outline: 2px solid var(--sm-accent, #145c32); outline-offset: 2px; }

/* Input */
.minty-chat-input-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 10px 10px 14px;
  border-top: 1px solid var(--sm-line, #e7e4dc);
  background: var(--sm-surface, #fff);
}
.minty-chat-input {
  flex: 1;
  min-width: 0;
  padding: 8px 0;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--sm-ink, #111512);
  font: 400 14px/1.4 var(--sm-font-body, system-ui, -apple-system, "Segoe UI", sans-serif);
}
.minty-chat-input::placeholder { color: var(--sm-muted, #5f6f64); }
.minty-chat-send {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--sm-accent, #145c32);
  color: var(--sm-on-accent, #fff);
  cursor: pointer;
}
.minty-chat-send svg { width: 16px; height: 16px; }
.minty-chat-send:hover { background: var(--sm-accent-ink, #0e3d1f); }
.minty-chat-send:focus-visible { outline: 2px solid var(--sm-accent, #145c32); outline-offset: 2px; }
.minty-chat-send:disabled { opacity: .45; cursor: default; }

/* Inside the app shell (every signed-in panel, /app included) the button is an icon-only 44 px circle at
   every width, so it never covers a book card's status pill or the shelf's "Browse all" link at the first
   view (fix round 2026-09-26). The aria-label and title still say "Ask Minty". Public pages keep the label. */
body[data-shell] .minty-chat-fab { width: 44px; padding: 0; }
body[data-shell] .minty-chat-fab .minty-fab-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Phone: an icon-only 44 px circle above the tab bar; the window becomes a sheet. */
@media (max-width: 639.98px) {
  .minty-chat-fab { right: 16px; width: 44px; padding: 0; }
  .minty-chat-fab .minty-fab-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .minty-chat-window {
    right: 12px;
    left: 12px;
    width: auto;
    max-height: calc(100vh - var(--sm-fab-bottom, 24px) - 80px);
  }
}
@media (prefers-reduced-motion: reduce) {
  .minty-chat-fab { transition: none; }
  .minty-chat-fab:hover { transform: none; }
}
@media print { .minty-chat-fab, .minty-chat-window { display: none !important; } }