/**
 * Stella.Support — Copilot chat drawer
 * Site-wide agentic chat surface (FAB + right-hand drawer).
 *
 * Discipline: design tokens only — no hex colours, no hardcoded font sizes.
 * Structural px (widths, borders, icon boxes) mirror the existing framework.
 * All motion is covered by the global prefers-reduced-motion gate in
 * ai-magic.css (it targets *, *::before, *::after). Colours are token-driven
 * so themes.css light/dark flips carry through automatically.
 */

/* ═══════════════════════════════════════════
   FLOATING ACTION BUTTON
   ═══════════════════════════════════════════ */

.copilot-fab {
  position: fixed;
  right: var(--space-5);
  bottom: var(--space-5);
  z-index: var(--z-overlay);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-ai-light);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-ai-border);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.copilot-fab:hover {
  transform: translateY(-2px);
  border-color: var(--color-ai);
  box-shadow: var(--shadow-xl);
}

.copilot-fab i {
  font-size: var(--text-md);
}

/* Hide the FAB while the drawer is open (drawer owns the surface) */
.copilot-fab.is-hidden {
  display: none;
}

/* On small screens keep the FAB compact */
@media (max-width: 640px) {
  .copilot-fab-label {
    display: none;
  }
  .copilot-fab {
    padding: var(--space-3);
  }
}

/* ═══════════════════════════════════════════
   BACKDROP
   ═══════════════════════════════════════════ */

.copilot-backdrop {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-modal) - 1);
  background: var(--color-bg-overlay);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.copilot-backdrop.is-open {
  opacity: 1;
}

/* ═══════════════════════════════════════════
   DRAWER SHELL
   ═══════════════════════════════════════════ */

.copilot-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-modal);      /* command palette (800) stays above */
  display: flex;
  flex-direction: column;
  width: 420px;
  max-width: 100vw;
  background: var(--color-bg-elevated);
  border-left: 1px solid var(--color-ai-border);
  border-radius: 0;
  box-shadow: var(--shadow-xl);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  overflow: hidden;
}

.copilot-drawer.is-open {
  transform: translateX(0);
}

/* Mobile: full-screen overlay */
@media (max-width: 640px) {
  .copilot-drawer {
    width: 100vw;
  }
  /* F18: the drawer is a full-screen overlay on mobile — lock the page behind
     it so touch scrolling doesn't bleed through to the underlying document. */
  body.copilot-open {
    overflow: hidden;
  }
}

/* ═══════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════ */

.copilot-drawer-header {
  flex: 0 0 auto;
  gap: var(--space-2);
}

.copilot-drawer-title {
  font-size: var(--text-md);
}

.copilot-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.copilot-conv-switcher {
  display: flex;
  min-width: 0;
  margin: 0;
}

.visually-hidden-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.copilot-conv-select {
  max-width: 150px;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.copilot-conv-select:focus {
  outline: none;
  border-color: var(--color-ai);
}

.copilot-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--text-sm);
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.copilot-icon-btn:hover {
  color: var(--color-ai-light);
  border-color: var(--color-ai-border);
  background: var(--color-ai-surface);
}

/* ═══════════════════════════════════════════
   MESSAGE LIST
   ═══════════════════════════════════════════ */

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

/* Empty state */
.copilot-empty {
  margin: auto 0;
  text-align: center;
  padding: var(--space-4) var(--space-2);
}

.copilot-empty-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-lg);
}

.copilot-empty-title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-2);
}

.copilot-empty-sub {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  margin: 0 0 var(--space-4);
}

.copilot-suggestions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.copilot-suggestion {
  display: block;
  width: 100%;
  text-align: left;
  padding: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.copilot-suggestion:hover {
  color: var(--color-text-primary);
  border-color: var(--color-ai-border);
  background: var(--color-ai-surface);
}

.copilot-suggestion i {
  margin-right: var(--space-2);
  color: var(--color-ai);
}

/* ═══════════════════════════════════════════
   MESSAGE BUBBLES
   ═══════════════════════════════════════════ */

.copilot-msg {
  display: flex;
  gap: var(--space-2);
  max-width: 100%;
}

.copilot-msg-avatar {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
}

.copilot-bubble {
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  word-wrap: break-word;
  overflow-wrap: anywhere;
  max-width: 84%;
}

/* User — right aligned, accent tinted */
.copilot-msg--user {
  flex-direction: row-reverse;
}

.copilot-msg--user .copilot-bubble {
  background: var(--color-primary-100);
  border: 1px solid var(--color-ai-border);
  color: var(--color-text-primary);
}

/* Assistant — left aligned with AI avatar */
.copilot-msg--assistant .copilot-msg-avatar {
  color: var(--color-ai-light);
  background: var(--color-ai-surface);
  border: 1px solid var(--color-ai-border);
}

.copilot-msg--assistant .copilot-bubble {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
}

/* Markdown internals inside a bubble */
.copilot-bubble p {
  margin: 0 0 var(--space-2);
}
.copilot-bubble p:last-child {
  margin-bottom: 0;
}
.copilot-bubble ul,
.copilot-bubble ol {
  margin: 0 0 var(--space-2);
  padding-left: var(--space-5);
}
.copilot-bubble li {
  margin-bottom: var(--space-1);
}
.copilot-bubble code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: 0.1em 0.35em;
  border-radius: var(--radius-sm);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border-subtle);
  color: var(--color-ai-light);
}
.copilot-bubble pre {
  margin: 0 0 var(--space-2);
  padding: var(--space-3);
  overflow-x: auto;
  border-radius: var(--radius-md);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
}
.copilot-bubble pre code {
  padding: 0;
  border: none;
  background: transparent;
  color: var(--color-text-primary);
}
.copilot-bubble a {
  color: var(--color-ai-light);
  text-decoration: underline;
}
.copilot-bubble strong {
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

/* ═══════════════════════════════════════════
   TOOL ACTIVITY ROWS
   ═══════════════════════════════════════════ */

.copilot-tool-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
}

.copilot-tool-row .copilot-tool-icon {
  flex: 0 0 auto;
  width: 16px;
  text-align: center;
}

.copilot-tool-row--ok .copilot-tool-icon {
  color: var(--color-success-light);
}

.copilot-tool-row--err .copilot-tool-icon {
  color: var(--color-danger-light);
}

.copilot-tool-label {
  color: var(--color-text-primary);
  font-weight: var(--weight-medium);
}

/* Waiting shimmer row */
.copilot-wait-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 18px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-ai-light);
  border-radius: var(--radius-md);
}

/* ═══════════════════════════════════════════
   PROPOSAL / CONFIRM CARDS
   ═══════════════════════════════════════════ */

.copilot-proposal {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-ai-border);
}

.copilot-proposal--danger {
  border-color: var(--color-warning-border);
  background: var(--color-warning-bg);
}

.copilot-proposal-head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

.copilot-proposal--danger .copilot-proposal-head i {
  color: var(--color-warning);
}

.copilot-proposal-summary {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  margin-bottom: var(--space-3);
}

.copilot-proposal-consequence {
  font-size: var(--text-xs);
  color: var(--color-warning-light);
  margin-bottom: var(--space-3);
}

.copilot-proposal-args {
  margin-bottom: var(--space-3);
  border-top: 1px solid var(--color-border-subtle);
  padding-top: var(--space-2);
}

.copilot-arg-row {
  display: flex;
  gap: var(--space-2);
  font-size: var(--text-xs);
  padding: var(--space-1) 0;
}

.copilot-arg-key {
  flex: 0 0 auto;
  min-width: 88px;
  color: var(--color-text-tertiary);
  font-weight: var(--weight-medium);
}

.copilot-arg-val {
  color: var(--color-text-primary);
  word-wrap: break-word;
  overflow-wrap: anywhere;
}

.copilot-proposal-actions {
  display: flex;
  gap: var(--space-2);
}

.copilot-proposal-status {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
}

.copilot-proposal-status--ok {
  color: var(--color-success-light);
}

.copilot-proposal-status--cancelled {
  color: var(--color-text-tertiary);
}

.copilot-proposal-status--err,
.copilot-proposal-status--expired {
  color: var(--color-danger-light);
}

/* Buttons inside the drawer reuse framework .btn classes; add compact sizing */
.copilot-proposal-actions .btn {
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-3);
}

/* ═══════════════════════════════════════════
   COMPOSER
   ═══════════════════════════════════════════ */

.copilot-composer {
  flex: 0 0 auto;
  padding: var(--space-3) var(--space-4) var(--space-4);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
}

.copilot-composer-inner {
  display: flex;
  align-items: flex-end;
  gap: var(--space-2);
  padding: var(--space-2);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast);
}

.copilot-composer-inner:focus-within {
  border-color: var(--color-ai);
}

.copilot-input {
  flex: 1 1 auto;
  max-height: 140px;
  min-height: 22px;
  resize: none;
  border: none;
  outline: none;
  background: transparent;
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

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

.copilot-composer-actions {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.copilot-send {
  color: var(--color-ai-light);
  border-color: var(--color-ai-border);
}

.copilot-send:hover {
  background: var(--color-ai-surface);
}

/* Mic listening state — pulsing accent ring */
.copilot-mic.is-listening {
  color: var(--color-primary-text);
  background: var(--color-ai);
  border-color: var(--color-ai);
  animation: copilot-mic-pulse 1.6s ease-in-out infinite;
}

@keyframes copilot-mic-pulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--color-ai-glow); }
  50% { box-shadow: 0 0 0 6px transparent; }
}

.copilot-composer-hint {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
}

.copilot-composer-hint kbd {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0 4px;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
}

/* Interim (ghost) voice text */
.copilot-input.is-interim {
  color: var(--color-text-tertiary);
  font-style: italic;
}