/* ══════════════════════════════════════
   AI Mentor — Cards, Explains, Loading
   ══════════════════════════════════════ */

/* ── AI Card ── */
.ai-card {
  background: var(--cd);
  border: 1px solid var(--bdr);
  border-left: 3px solid var(--acc);
  border-radius: var(--r);
  padding: 14px 16px;
  margin: 12px 0;
}

.ai-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.ai-card-icon {
  color: var(--acc);
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.ai-card-headline {
  font-size: 14px;
  font-weight: 700;
  color: var(--wh);
  line-height: 1.3;
}

.ai-card-body {
  font-size: 13px;
  color: var(--dim);
  line-height: 1.5;
}

.ai-card-action {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 10px;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--acc);
  background: transparent;
  border: 1px solid var(--acc);
  border-radius: 20px;
  cursor: pointer;
  transition: background 0.2s;
}

.ai-card-action:hover {
  background: rgba(201, 168, 124, 0.1);
}

/* ── Explain Button (pill) ── */
.ai-explain-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--acc);
  background: rgba(201, 168, 124, 0.08);
  border: 1px solid rgba(201, 168, 124, 0.25);
  border-radius: 16px;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: 8px;
}

.ai-explain-btn:hover {
  background: rgba(201, 168, 124, 0.18);
}

/* ── Inline Explain Block ── */
.ai-explain-block {
  background: var(--sf);
  border: 1px solid var(--bdr);
  border-left: 3px solid var(--acc);
  border-radius: var(--r);
  padding: 12px 14px;
  margin-top: 10px;
}

.ai-explain-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}

.ai-explain-icon {
  color: var(--acc);
  display: flex;
  align-items: center;
}

.ai-explain-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--acc);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.ai-explain-concept {
  font-size: 13px;
  font-weight: 700;
  color: var(--wh);
  margin-bottom: 6px;
}

.ai-explain-text {
  font-size: 13px;
  color: var(--dim);
  line-height: 1.55;
}

.ai-explain-tip {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  margin-top: 10px;
  padding: 8px 10px;
  font-size: 12px;
  color: var(--amb);
  background: rgba(245, 158, 11, 0.06);
  border-radius: 8px;
  line-height: 1.4;
}

/* ── Loading Shimmer ── */
.ai-loading {
  padding: 16px;
}

.ai-shimmer-line {
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--sf) 25%, rgba(201, 168, 124, 0.08) 50%, var(--sf) 75%);
  background-size: 200% 100%;
  animation: ai-shimmer 1.5s ease-in-out infinite;
  margin-bottom: 10px;
}

.ai-shimmer-line:last-child {
  margin-bottom: 0;
}

@keyframes ai-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Error State ── */
.ai-error {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-left-color: var(--dim);
}

.ai-error .ai-card-icon {
  color: var(--dim);
}

.ai-error .ai-card-body {
  flex: 1;
  font-size: 12px;
}

.ai-retry-btn {
  font-size: 11px;
  font-weight: 600;
  color: var(--acc);
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: underline;
  padding: 2px 4px;
}

/* ── Review Hub Explain Button ── */
.rv-ai-explain-wrap {
  margin-top: 8px;
}