/**
 * Firm.CompanyName 3.0 — Billing AI assistant styles.
 *
 * Covers:
 *   - AI inline prompt bar (billing hub)
 *   - AI inline result card
 *   - AI assistant drawer + chat bubbles
 *   - Contextual sparkle buttons (billing sub-pages)
 *   - Thinking dots animation
 *
 * Mirrors the proven patterns in fe30-strategies-ai.css, scoped with
 * `fe30-billing-ai-` prefixes to avoid conflicts.
 */

/* ============================================================
   INLINE PROMPT BAR (billing hub)
   ============================================================ */

.fe30-billing-ai-prompt {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-5);
  background: var(--bg-white);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--duration-fast) var(--ease-standard);
}

.fe30-billing-ai-prompt:focus-within {
  border-color: var(--brand-orange);
  box-shadow: var(--shadow-focus-orange);
}

.fe30-billing-ai-prompt-icon {
  flex-shrink: 0;
  color: var(--brand-orange);
}

.fe30-billing-ai-input {
  flex: 1 1 auto;
  min-width: 0;
  padding: var(--space-1) 0;
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  color: var(--ink-primary);
  background: transparent;
  border: none;
  outline: none;
}

.fe30-billing-ai-input::placeholder {
  color: var(--gray-400);
}

.fe30-billing-ai-send {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  padding: 0;
  border: none;
  background: var(--brand-orange);
  color: white;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    background var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-spring);
}

.fe30-billing-ai-send:hover {
  background: var(--brand-orange-dark);
}

.fe30-billing-ai-send:active {
  transform: scale(0.93);
}

.fe30-billing-ai-send:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus-orange);
}

/* ============================================================
   INLINE RESULT CARD (billing hub)
   ============================================================ */

.fe30-billing-ai-result {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  margin-bottom: var(--space-5);
  background: var(--bg-white);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--brand-orange);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  animation: fe30-billing-ai-slide-in var(--duration-base, 200ms) var(--ease-spring, ease) both;
}

.fe30-billing-ai-result[hidden] {
  display: none !important;
}

.fe30-billing-ai-result.is-loading .fe30-billing-ai-result-indicator {
  animation: fe30-billing-ai-pulse 1.2s ease-in-out infinite;
}

.fe30-billing-ai-result-body {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  flex: 1 1 auto;
  min-width: 0;
}

.fe30-billing-ai-result-thinking {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1 1 auto;
  min-width: 0;
}

.fe30-billing-ai-result-thinking[hidden],
.fe30-billing-ai-result-text[hidden] {
  display: none !important;
}

.fe30-billing-ai-result-thinking .fe30-billing-ai-stream-status {
  margin: 0;
}

.fe30-billing-ai-result-indicator {
  flex-shrink: 0;
  color: var(--brand-orange);
  margin-top: 2px;
}

.fe30-billing-ai-result-text {
  flex: 1 1 auto;
  min-width: 0;
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--ink-primary);
}

.fe30-billing-ai-result-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.fe30-billing-ai-expand {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--brand-orange);
  background: var(--brand-orange-light);
  border: 1px solid rgba(251, 106, 24, 0.2);
  border-radius: var(--radius-pill);
  cursor: pointer;
  white-space: nowrap;
  transition:
    background var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard);
}

.fe30-billing-ai-expand:hover {
  background: rgba(251, 106, 24, 0.15);
  border-color: var(--brand-orange);
}

.fe30-billing-ai-result-clear {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  padding: 0;
  border: none;
  background: none;
  color: var(--gray-400);
  font-size: 18px;
  cursor: pointer;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color var(--duration-fast) var(--ease-standard);
}

.fe30-billing-ai-result-clear:hover {
  color: var(--gray-700);
}

@keyframes fe30-billing-ai-slide-in {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fe30-billing-ai-pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.4; }
}

/* ============================================================
   AI ASSISTANT DRAWER (right-side slide-in)
   ============================================================ */

.fe30-billing-ai-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.35);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-pane, 300ms) var(--ease-spring, ease);
  z-index: 220;
}

.fe30-billing-ai-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

.fe30-billing-ai-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(520px, 100vw);
  display: flex;
  flex-direction: column;
  background: var(--bg-white);
  box-shadow: var(--shadow-xl);
  transform: translateX(100%);
  visibility: hidden;
  transition:
    transform var(--duration-pane, 300ms) var(--ease-spring, ease),
    visibility 0s linear var(--duration-pane, 300ms);
  z-index: 230;
  overflow: hidden;
}

.fe30-billing-ai-drawer.is-open {
  transform: translateX(0);
  visibility: visible;
  transition:
    transform var(--duration-pane, 300ms) var(--ease-spring, ease),
    visibility 0s linear 0s;
}

.fe30-billing-ai-drawer-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--hairline);
  flex-shrink: 0;
}

.fe30-billing-ai-drawer-titlewrap {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 1 1 auto;
  min-width: 0;
}

.fe30-billing-ai-drawer-titlewrap .fe30-billing-ai-icon {
  color: var(--brand-orange);
  flex-shrink: 0;
}

.fe30-billing-ai-drawer-title {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--dark-navy);
  letter-spacing: var(--tracking-tight);
}

.fe30-billing-ai-drawer-new {
  width: 32px;
  height: 32px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  color: var(--gray-600);
  cursor: pointer;
  transition:
    background var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard);
}

.fe30-billing-ai-drawer-new:hover {
  background: var(--bg-gray-50);
  color: var(--brand-orange);
}

.fe30-billing-ai-drawer-new:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus-orange);
}

.fe30-billing-ai-drawer-close {
  width: 32px;
  height: 32px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  color: var(--gray-600);
  font-size: 18px;
  cursor: pointer;
  transition:
    background var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard);
}

.fe30-billing-ai-drawer-close:hover {
  background: var(--bg-gray-50);
  color: var(--ink-primary);
}

.fe30-billing-ai-drawer-close:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus-orange);
}

/* ============================================================
   CHAT MESSAGES AREA
   ============================================================ */

.fe30-billing-ai-messages {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: var(--space-4) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.fe30-billing-ai-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-8) 0;
  flex: 1;
}

.fe30-billing-ai-welcome[hidden] {
  display: none !important;
}

.fe30-billing-ai-welcome-text {
  font-size: var(--text-base);
  color: var(--gray-500);
  margin: 0 0 var(--space-5);
}

.fe30-billing-ai-suggestions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
  max-width: 340px;
}

.fe30-billing-ai-suggestion {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--ink-primary);
  background: var(--bg-gray-50);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: left;
  transition:
    background var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard);
}

.fe30-billing-ai-suggestion:hover {
  background: var(--bg-white);
  border-color: var(--brand-orange);
}

.fe30-billing-ai-suggestion:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus-orange);
}

/* ============================================================
   CHAT BUBBLES
   ============================================================ */

.fe30-billing-ai-bubble {
  max-width: 85%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: 1.55;
  word-break: break-word;
  animation: fe30-billing-ai-bubble-in var(--duration-fast, 120ms) var(--ease-spring, ease) both;
}

.fe30-billing-ai-bubble--user {
  align-self: flex-end;
  background: var(--brand-orange);
  color: white;
  border-bottom-right-radius: var(--radius-xs);
}

.fe30-billing-ai-bubble--assistant {
  align-self: flex-start;
  background: var(--bg-gray-50);
  color: var(--ink-primary);
  border-bottom-left-radius: var(--radius-xs);
}

.fe30-billing-ai-bubble--streaming {
  min-width: 200px;
  min-height: 52px;
}

.fe30-billing-ai-stream-placeholder {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.fe30-billing-ai-stream-placeholder .fe30-billing-ai-thinking-dots {
  margin: 0;
}

.fe30-billing-ai-stream-status {
  margin: 0;
  font-size: var(--text-xs);
  line-height: 1.45;
  color: var(--gray-500);
}

.fe30-billing-ai-bubble-content {
  white-space: pre-wrap;
}

.fe30-billing-ai-bubble-content.fe30-billing-ai-bubble-content--rich {
  white-space: normal;
}

@keyframes fe30-billing-ai-bubble-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Markdown body inside assistant bubbles */
#fe30-billing-ai-drawer .fe30-billing-ai-md {
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--ink-primary);
}

#fe30-billing-ai-drawer .fe30-billing-ai-md p {
  margin: 0 0 var(--space-2);
}

#fe30-billing-ai-drawer .fe30-billing-ai-md p:last-child {
  margin-bottom: 0;
}

#fe30-billing-ai-drawer .fe30-billing-ai-md ul,
#fe30-billing-ai-drawer .fe30-billing-ai-md ol {
  margin: 0 0 var(--space-2);
  padding-left: 1.25rem;
}

#fe30-billing-ai-drawer .fe30-billing-ai-md li {
  margin-bottom: var(--space-1);
}

#fe30-billing-ai-drawer .fe30-billing-ai-md strong {
  font-weight: 600;
  color: var(--ink-primary);
}

#fe30-billing-ai-drawer .fe30-billing-ai-md code {
  font-size: 0.9em;
  padding: 0.1em 0.35em;
  border-radius: var(--radius-xs);
  background: rgba(32, 47, 61, 0.06);
}

#fe30-billing-ai-drawer .fe30-billing-ai-md pre {
  margin: var(--space-2) 0;
  padding: var(--space-2) var(--space-3);
  overflow-x: auto;
  border-radius: var(--radius-md);
  background: var(--bg-gray-50);
  border: 1px solid var(--hairline);
}

#fe30-billing-ai-drawer .fe30-billing-ai-md pre code {
  padding: 0;
  background: transparent;
}

#fe30-billing-ai-drawer .fe30-billing-ai-md h1,
#fe30-billing-ai-drawer .fe30-billing-ai-md h2,
#fe30-billing-ai-drawer .fe30-billing-ai-md h3 {
  margin: var(--space-3) 0 var(--space-2);
  font-weight: 600;
  line-height: 1.3;
}

#fe30-billing-ai-drawer .fe30-billing-ai-md h1:first-child,
#fe30-billing-ai-drawer .fe30-billing-ai-md h2:first-child,
#fe30-billing-ai-drawer .fe30-billing-ai-md h3:first-child {
  margin-top: 0;
}

/* Thinking dots */
.fe30-billing-ai-thinking {
  padding: var(--space-3) var(--space-4);
}

.fe30-billing-ai-thinking-dots {
  display: flex;
  gap: 4px;
  align-items: center;
}

.fe30-billing-ai-thinking-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gray-400);
  animation: fe30-billing-ai-dot-bounce 1.4s ease-in-out infinite;
}

.fe30-billing-ai-thinking-dots span:nth-child(2) {
  animation-delay: 0.16s;
}

.fe30-billing-ai-thinking-dots span:nth-child(3) {
  animation-delay: 0.32s;
}

@keyframes fe30-billing-ai-dot-bounce {
  0%, 80%, 100% { opacity: 0.3; transform: scale(0.85); }
  40%           { opacity: 1;   transform: scale(1.1); }
}

/* ============================================================
   COMPOSER (bottom input bar in drawer)
   ============================================================ */

.fe30-billing-ai-composer {
  display: flex;
  align-items: flex-end;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5) var(--space-4);
  border-top: 1px solid var(--hairline);
  flex-shrink: 0;
  background: var(--bg-white);
}

.fe30-billing-ai-drawer-input {
  flex: 1 1 auto;
  min-height: 40px;
  max-height: 120px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  color: var(--ink-primary);
  background: var(--bg-gray-50);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  resize: none;
  outline: none;
  transition: border-color var(--duration-fast) var(--ease-standard);
}

.fe30-billing-ai-drawer-input:focus {
  border-color: var(--brand-orange);
  box-shadow: var(--shadow-focus-orange);
}

.fe30-billing-ai-drawer-input::placeholder {
  color: var(--gray-400);
}

.fe30-billing-ai-drawer-send {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  background: var(--brand-orange);
  color: white;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    background var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-spring);
}

.fe30-billing-ai-drawer-send:hover {
  background: var(--brand-orange-dark);
}

.fe30-billing-ai-drawer-send:active {
  transform: scale(0.95);
}

.fe30-billing-ai-drawer-send:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus-orange);
}

/* ============================================================
   CONTEXTUAL SPARKLE BUTTON (billing sub-pages)
   ============================================================ */

.fe30-billing-ai-contextual-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  color: var(--brand-orange);
  cursor: pointer;
  transition:
    background var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

.fe30-billing-ai-contextual-btn:hover {
  background: var(--brand-orange-light);
  border-color: var(--brand-orange);
  box-shadow: 0 0 0 3px rgba(251, 106, 24, 0.12);
}

.fe30-billing-ai-contextual-btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus-orange);
}

/* ============================================================
   ACCESSIBILITY (visually hidden label)
   ============================================================ */

.fe30-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
  .fe30-billing-ai-drawer {
    width: 100vw;
  }

  .fe30-billing-ai-prompt {
    padding: var(--space-2) var(--space-3);
  }
}