/**
 * css/ask-book.css  —  Wave 4 "اسأل الكتاب"
 * Luxury RTL Arabic chat panel for المكتبة الطيبة
 *
 * Design tokens:
 *   --parchment : #FAF6EE  (background)
 *   --ink       : #0F1B2D  (text)
 *   --crimson   : #B1373F  (Indian red accent)
 *   --gold      : #B89968  (gold accent / borders)
 *   --gold-light: #D4B483  (lighter gold)
 */

/* ── Overlay ──────────────────────────────────────────────────────────────── */
#ask-book-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 27, 45, 0.35);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  z-index: 1200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

#ask-book-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

/* ── Panel ────────────────────────────────────────────────────────────────── */
#ask-book-panel {
  position: fixed;
  top: 0;
  right: 0;          /* slides in from the right (RTL natural side) */
  height: 100dvh;
  width: 420px;
  max-width: 100vw;
  background: #FAF6EE;
  border-right: none;
  border-left: 3px solid #B89968;
  box-shadow: -6px 0 40px rgba(15, 27, 45, 0.25);
  display: flex;
  flex-direction: column;
  z-index: 1201;
  transform: translateX(100%);
  transition: transform 380ms cubic-bezier(0.22, 1, 0.36, 1);
  font-family: 'Amiri', 'Reem Kufi', serif;
  color: #0F1B2D;
  overflow: hidden;
}

#ask-book-panel.open {
  transform: translateX(0);
}

/* ── Header ───────────────────────────────────────────────────────────────── */
#ask-book-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: linear-gradient(135deg, #0F1B2D 0%, #1a2d47 100%);
  border-bottom: 2px solid #B89968;
  flex-shrink: 0;
}

#ask-book-header-title {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #FAF6EE;
  font-family: 'Reem Kufi', 'Amiri', serif;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.ask-book-icon {
  font-size: 1.3rem;
  line-height: 1;
}

#ask-book-header-actions {
  display: flex;
  gap: 8px;
}

#ask-book-header-actions button {
  background: transparent;
  border: 1px solid rgba(184, 153, 104, 0.4);
  border-radius: 6px;
  color: #D4B483;
  cursor: pointer;
  font-size: 0.95rem;
  padding: 5px 10px;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  line-height: 1;
}

#ask-book-header-actions button:hover {
  background: rgba(184, 153, 104, 0.15);
  border-color: #B89968;
  color: #FAF6EE;
}

/* ── Book info banner ─────────────────────────────────────────────────────── */
#ask-book-book-info {
  padding: 8px 18px;
  background: rgba(184, 153, 104, 0.12);
  border-bottom: 1px solid rgba(184, 153, 104, 0.3);
  font-size: 0.82rem;
  color: #5a4a30;
  font-family: 'Amiri', serif;
  min-height: 0;
  transition: min-height 0.2s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex-shrink: 0;
}

#ask-book-book-info:empty {
  display: none;
}

/* ── Messages area ────────────────────────────────────────────────────────── */
#ask-book-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scroll-behavior: smooth;
}

#ask-book-messages::-webkit-scrollbar {
  width: 5px;
}
#ask-book-messages::-webkit-scrollbar-thumb {
  background: rgba(184, 153, 104, 0.4);
  border-radius: 10px;
}

/* ── Message bubbles ──────────────────────────────────────────────────────── */
.ask-book-msg {
  display: flex;
  max-width: 88%;
  animation: askBookFadeIn 0.25s ease;
}

@keyframes askBookFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0);   }
}

/* User: right-aligned, gold border */
.ask-book-msg--user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.ask-book-msg--user .ask-book-bubble {
  background: linear-gradient(135deg, #fff8ee 0%, #fdf3e0 100%);
  border: 1.5px solid #B89968;
  border-radius: 16px 4px 16px 16px;
  color: #0F1B2D;
  padding: 10px 14px;
  font-size: 0.92rem;
  line-height: 1.65;
  text-align: right;
  box-shadow: 0 2px 8px rgba(184, 153, 104, 0.2);
}

/* Assistant: left-aligned, parchment */
.ask-book-msg--assistant {
  align-self: flex-start;
}

.ask-book-msg--assistant .ask-book-bubble {
  background: #FFFFFF;
  border: 1px solid rgba(184, 153, 104, 0.35);
  border-radius: 4px 16px 16px 16px;
  color: #0F1B2D;
  padding: 10px 14px;
  font-size: 0.92rem;
  line-height: 1.75;
  text-align: right;
  white-space: pre-wrap;
  box-shadow: 0 2px 6px rgba(15, 27, 45, 0.06);
}

/* ── Typing indicator ─────────────────────────────────────────────────────── */
.ask-book-typing {
  display: flex !important;
  align-items: center;
  gap: 5px;
  padding: 12px 16px;
}

.ask-book-typing span {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #B89968;
  animation: askBookDot 1.3s infinite ease-in-out;
}

.ask-book-typing span:nth-child(1) { animation-delay: 0s;    }
.ask-book-typing span:nth-child(2) { animation-delay: 0.2s;  }
.ask-book-typing span:nth-child(3) { animation-delay: 0.4s;  }

@keyframes askBookDot {
  0%, 60%, 100% { transform: translateY(0);    opacity: 0.4; }
  30%           { transform: translateY(-6px); opacity: 1;   }
}

/* ── Starter questions ────────────────────────────────────────────────────── */
#ask-book-starters {
  padding: 6px 14px 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  flex-shrink: 0;
}

.ask-book-starter {
  background: rgba(184, 153, 104, 0.1);
  border: 1px solid rgba(184, 153, 104, 0.4);
  border-radius: 20px;
  color: #5a4a30;
  cursor: pointer;
  font-family: 'Amiri', serif;
  font-size: 0.8rem;
  padding: 5px 13px;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  text-align: right;
  line-height: 1.5;
}

.ask-book-starter:hover {
  background: rgba(184, 153, 104, 0.22);
  border-color: #B89968;
  color: #0F1B2D;
}

/* ── Input area ───────────────────────────────────────────────────────────── */
#ask-book-input-area {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding: 12px 14px 16px;
  border-top: 1.5px solid rgba(184, 153, 104, 0.35);
  background: rgba(250, 246, 238, 0.95);
  flex-shrink: 0;
}

#ask-book-input-wrap {
  flex: 1;
  position: relative;
}

#ask-book-input {
  width: 100%;
  box-sizing: border-box;
  resize: none;
  background: #FFFFFF;
  border: 1.5px solid rgba(184, 153, 104, 0.5);
  border-radius: 12px;
  color: #0F1B2D;
  direction: rtl;
  font-family: 'Amiri', serif;
  font-size: 0.95rem;
  line-height: 1.6;
  padding: 10px 14px 26px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

#ask-book-input:focus {
  border-color: #B89968;
  box-shadow: 0 0 0 3px rgba(184, 153, 104, 0.15);
}

#ask-book-input::placeholder {
  color: #aaa;
  font-style: italic;
}

#ask-book-char-count {
  position: absolute;
  bottom: 8px;
  left: 12px;
  font-size: 0.7rem;
  color: #b0a080;
  pointer-events: none;
  font-family: monospace;
}

#ask-book-send {
  background: linear-gradient(135deg, #0F1B2D 0%, #1a2d47 100%);
  border: 2px solid #B89968;
  border-radius: 12px;
  color: #B89968;
  cursor: pointer;
  font-size: 1.3rem;
  height: 48px;
  width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s, color 0.2s, transform 0.15s, box-shadow 0.2s;
}

#ask-book-send:hover:not(:disabled) {
  background: linear-gradient(135deg, #B89968 0%, #D4B483 100%);
  color: #0F1B2D;
  box-shadow: 0 4px 12px rgba(184, 153, 104, 0.35);
}

#ask-book-send:active:not(:disabled) {
  transform: scale(0.93);
}

#ask-book-send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.ask-book-send-icon {
  line-height: 1;
}

/* ── Toolbar button (injected in reader.html) ─────────────────────────────── */
#ask-book-btn {
  align-items: center;
  background: transparent;
  border: 1px solid rgba(184, 153, 104, 0.45);
  border-radius: 8px;
  color: inherit;
  cursor: pointer;
  display: flex;
  font-family: 'Reem Kufi', 'Amiri', serif;
  font-size: 0.82rem;
  gap: 5px;
  padding: 6px 11px;
  transition: background 0.2s, border-color 0.2s, color 0.2s, box-shadow 0.2s;
  white-space: nowrap;
}

#ask-book-btn:hover {
  background: rgba(184, 153, 104, 0.12);
  border-color: #B89968;
}

#ask-book-btn.active {
  background: rgba(184, 153, 104, 0.2);
  border-color: #B89968;
  box-shadow: 0 0 0 2px rgba(184, 153, 104, 0.25);
}

/* ── Responsive: full-screen on mobile ────────────────────────────────────── */
@media (max-width: 640px) {
  #ask-book-panel {
    width: 100vw;
    border-left: none;
  }
}

/* ── Reduced motion ───────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  #ask-book-panel,
  #ask-book-overlay,
  .ask-book-msg,
  .ask-book-typing span {
    transition: none;
    animation: none;
  }
}