/* ================================================================
   TUTOR CHAT — post-answer ChatGPT thread in the left practice panel
   ================================================================
   Bubble alignment carries the speaker: tutor left, learner right.
   Only the thread scrolls; the composer stays pinned under it. */

.tutor-section {
  border-top: 1px solid var(--border);
  padding-top: 18px;
  margin-top: 18px;
}

.tutor-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.tutor-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tutor-hint {
  font-size: 11px;
  color: var(--muted);
}

.tutor-thread {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 420px;
  overflow-y: auto;
  padding: 4px 2px;
}

/* Empty state doubles as the affordance — the learner sees what they can
   ask before there is any thread to read. */
.tutor-empty {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
  padding: 6px 2px 2px;
}

.tutor-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.tutor-suggestion {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  cursor: pointer;
  font-size: 12px;
  padding: 6px 12px;
}

.tutor-suggestion:hover {
  border-color: var(--accent-text);
  color: var(--white);
}

.tutor-row {
  display: flex;
}

.tutor-row--assistant {
  justify-content: flex-start;
}

.tutor-row--user {
  justify-content: flex-end;
}

.tutor-bubble {
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.6;
  max-width: 86%;
  padding: 10px 14px;
  word-break: break-word;
}

.tutor-bubble--assistant {
  background: var(--bg);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
  color: var(--text);
}

.tutor-bubble--user {
  background: var(--card);
  border: 1px solid var(--border);
  border-bottom-right-radius: 4px;
  color: var(--white);
  white-space: pre-wrap;
}

.tutor-row--thinking .tutor-bubble,
.tutor-row--error .tutor-bubble {
  color: var(--muted);
  font-style: italic;
}

.tutor-bubble code {
  background: var(--surface);
  border-radius: 4px;
  font-family: var(--code-font);
  font-size: 12px;
  padding: 1px 5px;
}

.tutor-code {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--code-font);
  font-size: 12px;
  line-height: 1.55;
  margin: 8px 0;
  overflow-x: auto;
  padding: 10px 12px;
  white-space: pre;
}

.tutor-composer {
  align-items: flex-end;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  gap: 8px;
  margin-top: 12px;
  padding: 8px 8px 8px 12px;
}

.tutor-input {
  background: transparent;
  border: none;
  color: var(--text);
  flex: 1;
  font-family: inherit;
  font-size: 13px;
  line-height: 1.5;
  max-height: 160px;
  min-height: 24px;
  outline: none;
  overflow-y: auto;
  padding: 4px 0;
  resize: none;
}

.tutor-input::placeholder {
  color: var(--muted);
}

.tutor-input:disabled {
  opacity: 0.6;
}

.tutor-send-btn {
  background: var(--accent);
  border: none;
  border-radius: 8px;
  color: var(--on-accent);
  cursor: pointer;
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
}

.tutor-send-btn:hover:not(:disabled) {
  background: var(--accent-dark);
}

.tutor-send-btn:disabled {
  cursor: default;
  opacity: 0.5;
}