/* ==========================================================================
   AI Study Assistant — floating support-chat widget
   Reuses the portal's existing tokens (--forest, --gold, --paper, etc.)
   defined in style.css, so this file only adds new component styles.
   ========================================================================== */

/* ---------- Launcher bubble ---------- */
.assistant-launcher {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--forest);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-pop);
  cursor: pointer;
  border: none;
  z-index: 205;
  transition: transform 0.15s ease, background 0.15s ease;
}
.assistant-launcher:hover { transform: scale(1.06); background: var(--forest-deep); }
.assistant-launcher svg { width: 26px; height: 26px; }
.assistant-launcher .assistant-launcher-close { display: none; }
.assistant-launcher.is-open .assistant-launcher-chat { display: none; }
.assistant-launcher.is-open .assistant-launcher-close { display: block; }
.assistant-launcher-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gold);
  border: 2px solid var(--forest);
}

/* ---------- Panel ---------- */
.assistant-panel {
  position: fixed;
  bottom: 96px;
  right: 24px;
  width: min(440px, 94vw);
  height: min(700px, 86vh);
  background: var(--paper-raised);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-pop);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 206;
  opacity: 0;
  transform: translateY(16px) scale(0.98);
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}
.assistant-panel.open { opacity: 1; transform: none; pointer-events: auto; }

.assistant-head {
  background: var(--forest);
  color: var(--white);
  padding: 16px 18px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  flex-shrink: 0;
}
.assistant-head strong { font-family: var(--font-display); font-size: 1.05rem; display: block; }
.assistant-head span { font-size: 0.78rem; color: rgba(255, 255, 255, 0.75); }
.assistant-head-actions { display: flex; gap: 6px; }

/* ---------- Message list ---------- */
.assistant-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--paper);
}

.assistant-msg { max-width: 88%; font-size: 0.92rem; line-height: 1.5; white-space: pre-wrap; }
.assistant-msg p { margin: 0; }
.assistant-msg.user {
  align-self: flex-end;
  background: var(--forest);
  color: var(--white);
  border-radius: 14px 14px 2px 14px;
  padding: 10px 14px;
}
.assistant-msg.bot {
  align-self: flex-start;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 14px 14px 14px 2px;
  padding: 10px 14px;
  color: var(--ink);
}
.assistant-msg.error { border-color: var(--red); color: var(--red); }

.assistant-typing {
  align-self: flex-start;
  display: flex;
  gap: 4px;
  padding: 12px 14px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 14px 14px 14px 2px;
}
.assistant-typing span {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--ink-soft);
  animation: assistant-bounce 1s infinite ease-in-out;
}
.assistant-typing span:nth-child(2) { animation-delay: 0.15s; }
.assistant-typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes assistant-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
  30% { transform: translateY(-4px); opacity: 1; }
}

/* Suggested quick-prompt chips, shown at the start of a conversation */
.assistant-suggestions { display: flex; flex-wrap: wrap; gap: 8px; }
.assistant-chip {
  background: var(--forest-tint);
  color: var(--forest-deep);
  border: none;
  padding: 7px 12px;
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
}
.assistant-chip:hover { background: var(--gold-tint); color: var(--gold-deep); }

/* Recommended-resource mini cards inside a chat bubble */
.assistant-rec-list { display: flex; flex-direction: column; gap: 8px; margin-top: 4px; max-width: 92%; align-self: flex-start; }
.assistant-rec-card {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius-s);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
}
.assistant-rec-card h5 { margin: 0; font-family: var(--font-display); font-size: 0.98rem; color: var(--ink); }
.assistant-rec-meta { display: flex; gap: 6px; flex-wrap: wrap; font-size: 0.68rem; font-weight: 600; color: var(--forest); }
.assistant-rec-actions { display: flex; gap: 6px; margin-top: 2px; }
.assistant-rec-actions .btn { flex: 1; justify-content: center; padding: 6px 10px; font-size: 0.78rem; }

/* ---------- Attached-document chip ---------- */
.assistant-attach-row { padding: 0 16px; flex-shrink: 0; }
.assistant-attach-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gold-tint);
  color: var(--gold-deep);
  padding: 6px 8px 6px 12px;
  border-radius: 30px;
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.assistant-attach-chip button {
  background: rgba(168, 114, 26, 0.15);
  border: none;
  color: var(--gold-deep);
  width: 18px; height: 18px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.7rem;
  line-height: 1;
}
.assistant-attach-chip.is-uploading {
  background: var(--paper-raised);
  color: var(--ink-soft);
}

/* ---------- Attach-a-resource picker ---------- */
.assistant-picker-upload-link {
  align-self: flex-start;
  background: none;
  border: none;
  color: var(--forest);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  padding: 4px 2px;
}
.assistant-picker-upload-link:hover { text-decoration: underline; }

/* ---------- Attach-a-resource picker ---------- */
.assistant-picker {
  border-top: 1px solid var(--line);
  background: var(--paper-raised);
  padding: 12px 16px;
  flex-shrink: 0;
  max-height: 220px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.assistant-picker[hidden] {
  display: none;
}
.assistant-picker input {
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  padding: 9px 12px;
  font-size: 0.88rem;
  background: var(--paper);
}
.assistant-picker-results { overflow-y: auto; display: flex; flex-direction: column; gap: 4px; max-height: 140px; }
.assistant-picker-item {
  text-align: left;
  background: transparent;
  border: none;
  border-radius: var(--radius-s);
  padding: 8px 10px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--ink);
}
.assistant-picker-item:hover { background: var(--forest-tint); }
.assistant-picker-item small { display: block; color: var(--ink-soft); font-size: 0.72rem; margin-top: 2px; }
.assistant-picker-empty { font-size: 0.82rem; color: var(--ink-soft); padding: 6px 10px; }

/* ---------- Input row ---------- */
.assistant-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--line);
  background: var(--paper-raised);
  flex-shrink: 0;
}
.assistant-input-row input[type="text"] {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  padding: 10px 14px;
  font-size: 0.92rem;
  background: var(--paper);
}
.assistant-input-row input[type="text"]:focus { border-color: var(--forest); outline: none; }
.assistant-input-row .icon-btn { background: var(--forest-tint); color: var(--forest-deep); }
.assistant-input-row .icon-btn:hover { background: var(--gold-tint); color: var(--gold-deep); }
.assistant-input-row .icon-btn.is-active { background: var(--gold); color: var(--white); }

/* Small "Ask AI" trigger added to resource cards */
.resource-actions .btn-ai { flex: 1; justify-content: center; }

@media (max-width: 480px) {
  .assistant-panel {
    right: 16px;
    left: 16px;
    width: auto;
    bottom: 92px;
    height: min(84vh, 720px);
  }
  .assistant-launcher { right: 16px; bottom: 16px; }
}