/* ============================================================
   AI chat — Ask Rex FAB + side drawer.
   Stimulus hooks: [data-open], [hidden], .is-ai-chat-open,
   [data-status], and all target classes remain unchanged.
   ============================================================ */

.ai-chat-fab {
  position: fixed;
  right: calc(var(--geist-gap) + env(safe-area-inset-right));
  bottom: calc(var(--geist-gap) + env(safe-area-inset-bottom));
  z-index: var(--z-popover);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 0;
  border-radius: var(--radius-full);
  background: var(--ds-gray-1000);
  color: var(--ds-background-100);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 20px;
  font-weight: 500;
  cursor: pointer;
  opacity: 1;
  transform: translateY(0);
  transition:
    background-color .15s cubic-bezier(.4, 0, .2, 1),
    opacity .15s cubic-bezier(.4, 0, .2, 1),
    transform .15s cubic-bezier(.4, 0, .2, 1);
}

.ai-chat-fab:hover {
  background: var(--ds-gray-900);
  opacity: 1;
}

.ai-chat-fab:active { transform: translateY(1px); }

.ai-chat-fab:focus-visible {
  outline: none;
  box-shadow: var(--ds-focus-ring);
}

.ai-chat-fab-icon { width: 24px; height: 24px; flex-shrink: 0; }

.app-shell.is-ai-chat-open .ai-chat-fab {
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
}

@media (max-width: 520px) {
  .ai-chat-fab {
    top: calc(var(--geist-space-2x) + env(safe-area-inset-top));
    right: calc(var(--geist-space-3x) + env(safe-area-inset-right));
    bottom: auto;
  }

  .app-topbar { padding-right: calc(48px + var(--geist-space-6x)); }
  .app-main { padding-right: calc(48px + var(--geist-space-6x)); }
}

.ai-chat-backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--z-backdrop);
  background: var(--ds-overlay-backdrop-color);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--ds-motion-overlay-duration) var(--ds-motion-overlay-timing);
}

.ai-chat-backdrop[data-open="true"] {
  opacity: var(--ds-overlay-backdrop-opacity);
  pointer-events: auto;
}

.ai-chat-drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: var(--z-drawer);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  width: min(420px, 100vw);
  height: 100dvh;
  overflow: hidden;
  overscroll-behavior: contain;
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
  background: var(--ds-background-100);
  box-shadow: var(--ds-shadow-modal);
  opacity: 0;
  pointer-events: none;
  transform: translateX(100%);
  transition:
    opacity var(--ds-motion-overlay-duration) var(--ds-motion-overlay-timing),
    transform var(--ds-motion-overlay-duration) var(--ds-motion-overlay-timing);
  will-change: transform, opacity;
}

.ai-chat-drawer[data-open="true"] {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}

.ai-chat-drawer[hidden],
.ai-chat-backdrop[hidden] { display: none; }

.ai-chat-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--geist-gap-half);
  padding: var(--geist-space-3x) var(--geist-space-4x);
  box-shadow: inset 0 -1px 0 var(--ds-gray-400);
  background: var(--ds-background-100);
}

.ai-chat-brand {
  display: flex;
  align-items: center;
  gap: var(--geist-gap-half);
  min-width: 0;
}

.ai-chat-brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: var(--geist-radius);
  background: var(--ds-background-100);
  box-shadow: var(--ds-shadow-border);
  color: var(--ds-gray-1000);
}

.ai-chat-brand-icon { width: 24px; height: 24px; }

.ai-chat-title {
  margin: 0;
  color: var(--ds-gray-1000);
  font-size: 16px;
  font-weight: 600;
  line-height: 24px;
}

.ai-chat-status {
  margin-top: 2px;
  color: var(--ds-gray-700);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 16px;
  font-variant-numeric: tabular-nums;
}

.ai-chat-status[data-status="running"] {
  color: var(--ds-gray-900);
  animation: ai-status-pulse 1.6s cubic-bezier(.4, 0, .2, 1) infinite;
}

.ai-chat-status[data-status="failed"] { color: var(--ds-red-900); }

.ai-chat-actions {
  display: flex;
  align-items: center;
  gap: var(--geist-gap-quarter);
  flex-shrink: 0;
}

.ai-chat-action-form { display: inline-flex; margin: 0; }

.ai-chat-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  min-width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  border-radius: var(--geist-radius);
  background: transparent;
  color: var(--ds-gray-900);
  cursor: pointer;
  transition:
    background-color .15s cubic-bezier(.4, 0, .2, 1),
    color .15s cubic-bezier(.4, 0, .2, 1),
    transform .15s cubic-bezier(.4, 0, .2, 1);
}

.ai-chat-icon-btn:hover {
  background: var(--ds-gray-alpha-100);
  color: var(--ds-gray-1000);
}

.ai-chat-icon-btn:active { transform: translateY(1px); }

.ai-chat-icon-btn:focus-visible {
  outline: none;
  box-shadow: var(--ds-focus-ring);
}

.ai-chat-icon-btn-svg { width: 18px; height: 18px; }

.ai-chat-messages {
  display: flex;
  flex-direction: column;
  gap: var(--geist-gap-half);
  min-height: 0;
  padding: var(--geist-space-4x);
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--ds-background-100);
}

.ai-chat-empty { margin: auto 0; padding: 8px 0; }

.ai-chat-empty-lead {
  margin: 0 0 var(--geist-space-3x);
  color: var(--ds-gray-900);
  font-size: 13px;
  line-height: 18px;
}

.ai-chat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--geist-gap-quarter);
}

.ai-chat-chip {
  display: inline-flex;
  width: auto;
  min-height: var(--ds-size-small);
  padding: 0 var(--geist-space-3x);
  border: 0;
  border-radius: var(--geist-radius);
  background: var(--ds-background-100);
  box-shadow: var(--ds-shadow-border);
  color: var(--ds-gray-1000);
  font-family: var(--font-sans);
  font-size: 12px;
  line-height: 16px;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition:
    background-color .15s cubic-bezier(.4, 0, .2, 1),
    box-shadow .15s cubic-bezier(.4, 0, .2, 1),
    transform .15s cubic-bezier(.4, 0, .2, 1);
}

.ai-chat-chip:hover {
  background: var(--ds-gray-100);
  box-shadow: var(--ds-shadow-border);
}

.ai-chat-chip:active { transform: translateY(1px); }

.ai-chat-chip:focus-visible {
  outline: none;
  box-shadow: var(--ds-shadow-border), var(--ds-focus-ring);
}

.ai-chat-message {
  max-width: 88%;
  animation: ai-msg-in .2s var(--ds-motion-timing-swift) both;
}

.ai-chat-message-user {
  align-self: flex-end;
  max-width: 80%;
  padding: var(--geist-space-2x) var(--geist-space-3x);
  border-radius: var(--radius);
  background: var(--ds-gray-100);
}

.ai-chat-message-assistant {
  align-self: flex-start;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  align-items: start;
  gap: var(--geist-gap-quarter);
  max-width: 96%;
  padding: 0;
  border: 0;
  background: transparent;
}

.ai-chat-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  border-radius: var(--geist-radius);
  background: var(--ds-background-100);
  box-shadow: var(--ds-shadow-border);
  color: var(--ds-gray-1000);
}

.ai-chat-avatar-icon { width: 18px; height: 18px; }

.ai-chat-bubble {
  min-width: 0;
  padding: var(--geist-space-2x) var(--geist-space-3x);
  border-radius: var(--radius);
  background: var(--ds-background-100);
  box-shadow: var(--ds-shadow-border);
}

.ai-chat-message-meta {
  margin-bottom: 2px;
  color: var(--ds-gray-700);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 16px;
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}

.ai-chat-message-content {
  color: var(--ds-gray-1000);
  font-size: 14px;
  line-height: 20px;
  overflow-wrap: anywhere;
}

.ai-chat-message-content:empty::before {
  content: "Reading data";
  color: var(--ds-gray-700);
}

.ai-chat-message-content p { margin: 0 0 8px; }
.ai-chat-message-content p:last-child { margin-bottom: 0; }

.ai-chat-form {
  display: flex;
  flex-direction: column;
  gap: var(--geist-space);
  padding: var(--geist-space-3x) var(--geist-space-4x);
  box-shadow: inset 0 1px 0 var(--ds-gray-400);
  background: var(--ds-background-100);
}

.ai-chat-composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: var(--geist-gap-quarter);
}

.ai-chat-input.textarea,
.ai-chat-input {
  box-sizing: border-box;
  width: 100%;
  max-width: none;
  min-height: 44px;
  max-height: 140px;
  margin: 0;
  padding: var(--geist-space-2x) var(--geist-space-3x);
  resize: none;
  overflow-y: auto;
  border: 0;
  border-radius: var(--geist-radius);
  background: var(--ds-background-100);
  box-shadow: var(--ds-shadow-border);
  color: var(--ds-gray-1000);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 20px;
  transition: box-shadow .15s cubic-bezier(.4, 0, .2, 1);
}

.ai-chat-input:hover { box-shadow: 0 0 0 1px var(--ds-gray-500), var(--ds-shadow-background-border); }

.ai-chat-input:focus,
.ai-chat-input:focus-visible {
  outline: none;
  box-shadow: var(--ds-shadow-border), var(--ds-focus-ring);
}

.ai-chat-submit {
  box-sizing: border-box;
  align-self: end;
  width: 44px;
  min-width: 44px;
  height: 44px;
  min-height: 44px;
  padding: 0;
}

.ai-chat-hint {
  margin: 0;
  color: var(--ds-gray-700);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 16px;
}

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

@keyframes ai-status-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

@media (max-width: 640px) {
  .ai-chat-drawer { width: 100vw; border-radius: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .ai-chat-fab,
  .ai-chat-drawer,
  .ai-chat-backdrop,
  .ai-chat-message,
  .ai-chat-status[data-status="running"] {
    transition: none;
    animation: none;
  }

  .app-shell.is-ai-chat-open .ai-chat-fab { opacity: 0; transform: none; }
}