/* ═══ Context-Sensitive Help Chat ═══ */

/* Help button (?) */
.help-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1px solid var(--border-secondary);
  background: var(--bg-primary);
  color: var(--text-tertiary);
  font-size: 10px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.15s;
  line-height: 1;
  padding: 0;
}

.help-btn:hover {
  background: var(--teal-light);
  border-color: var(--teal);
  color: var(--teal);
}

/* In sidebar layer items */
.layer-item .help-btn {
  margin-left: auto;
  opacity: 0;
  transition: opacity 0.15s;
}
.layer-item:hover .help-btn { opacity: 1; }

/* In metric cards */
.mc-id .help-btn {
  margin-left: 4px;
  vertical-align: middle;
}

/* ── Chat Panel (slide-out from right) ── */
.help-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
}

.help-overlay.open { display: flex; }

.help-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.2);
}

.help-panel {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 380px;
  max-width: 90vw;
  background: var(--bg-primary);
  border-left: 1px solid var(--border-tertiary);
  display: flex;
  flex-direction: column;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.08);
  animation: slideIn 0.2s ease;
}

@keyframes slideIn {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}

/* Chat header */
.help-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-tertiary);
  flex-shrink: 0;
}

.help-header-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--teal-light);
  color: var(--teal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
}

.help-header-text { flex: 1; min-width: 0; }

.help-header-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.help-header-sub {
  font-size: 10px;
  color: var(--text-tertiary);
}

.help-close-btn {
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.help-close-btn:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* Chat messages area */
.help-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.help-msg {
  max-width: 90%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 12px;
  line-height: 1.6;
}

.help-msg.assistant {
  align-self: flex-start;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-bottom-left-radius: 4px;
}

.help-msg.user {
  align-self: flex-end;
  background: var(--navy);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.help-msg.loading {
  color: var(--text-tertiary);
  font-style: italic;
}

/* Definition card shown first */
.help-def-card {
  background: var(--teal-light);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 11px;
  line-height: 1.6;
  color: #065F46;
  border-left: 3px solid var(--teal);
}

.help-def-label {
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--teal);
  margin-bottom: 4px;
}

/* Score explanation card */
.help-score-card {
  background: #EFF6FF;
  border-left-color: #3B82F6;
  color: #1E3A5F;
  margin-top: 8px;
}
.help-score-card .help-def-label {
  color: #3B82F6;
}
.help-score-value {
  font-weight: 700;
  font-size: 11px;
  background: #DBEAFE;
  padding: 1px 6px;
  border-radius: 4px;
  margin-left: 4px;
}

/* Benchmark card (best/worst from the literature) */
.help-bench-card {
  background: #FFFBEB;
  border-left-color: #D97706;
  color: #78350F;
  margin-top: 8px;
}
.help-bench-card .help-def-label {
  color: #D97706;
}
.help-bench-row {
  margin-top: 6px;
  padding: 4px 0;
  line-height: 1.5;
}
.help-bench-row + .help-bench-row {
  margin-top: 4px;
  padding-top: 6px;
  border-top: 1px solid rgba(217, 119, 6, 0.15);
}
.help-bench-icon {
  font-size: 9px;
  margin-right: 2px;
}
.help-bench-icon.best { color: #059669; }
.help-bench-icon.worst { color: #DC2626; }

/* Chat input area */
.help-input-area {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--border-tertiary);
  flex-shrink: 0;
}

.help-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--border-tertiary);
  border-radius: var(--radius-md);
  font-size: 12px;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-secondary);
  outline: none;
}

.help-input:focus { border-color: var(--teal); }

.help-input::placeholder { color: var(--text-tertiary); }

.help-send-btn {
  padding: 8px 14px;
  border: none;
  border-radius: var(--radius-md);
  background: var(--teal);
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: opacity 0.15s;
}

.help-send-btn:hover { opacity: 0.85; }
.help-send-btn:disabled { opacity: 0.5; cursor: not-allowed; }