/* ============================================================
   HUD Support Messenger — Bottom-Right Floating Widget
   Structure modeled on the Render help widget:
   Home (status + suggestions + send) / Messages (compose + receipts)
   Polite • Capable • Non-intrusive • No glow, no gradients
   ============================================================ */

/* ---- Launcher (collapsed) ---- */
.hud-dock {
  position: fixed;
  right: var(--space-3);
  bottom: var(--space-3);
  z-index: 200;
}

.hud-dock__trigger {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-base), transform var(--transition-base);
  position: relative;
}

.hud-dock__trigger:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.hud-dock__trigger:focus-visible {
  outline: 2px solid var(--hud-focus-ring);
  outline-offset: 2px;
}

.hud-dock__trigger-icon {
  width: 24px;
  height: 24px;
  color: var(--accent);
}

/* Hide the launcher while the panel is open */
.hud-dock[data-open="true"] .hud-dock__trigger {
  opacity: 0;
  pointer-events: none;
}

/* Subtle ambient pulse — long interval, never demanding */
.hud-dock__trigger::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid var(--accent-border);
  opacity: 0;
  animation: hud-pulse 14s ease-in-out infinite;
}

@keyframes hud-pulse {
  0%, 90%, 100% { opacity: 0; transform: scale(1); }
  95% { opacity: 0.6; transform: scale(1.12); }
}

@media (prefers-reduced-motion: reduce) {
  .hud-dock__trigger::after { animation: none; }
}

/* ---- Panel ---- */
.hud-panel {
  position: fixed;
  right: var(--space-3);
  bottom: var(--space-3);
  width: min(380px, calc(100vw - 2 * var(--space-3)));
  height: min(620px, calc(100vh - 2 * var(--space-3)));
  background: var(--hud-bg);
  border: 1px solid var(--hud-border);
  border-radius: calc(var(--radius) * 2);
  box-shadow: var(--shadow-card);
  z-index: 201;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  transform: translateY(12px) scale(0.98);
  transform-origin: bottom right;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.hud-panel--open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

@media (prefers-reduced-motion: reduce) {
  .hud-panel { transition: opacity var(--transition-base); transform: none; }
  .hud-panel--open { transform: none; }
}

/* ---- Header ---- */
.hud-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--hud-border);
  flex-shrink: 0;
}

.hud-panel__title {
  font-family: var(--font-heading);
  font-size: var(--fs-body);
  font-weight: var(--fw-semibold);
  color: var(--hud-text-primary);
}

.hud-panel__close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--hud-text-secondary);
  border-radius: var(--radius);
  transition: color var(--transition-fast), background var(--transition-fast);
  cursor: pointer;
}

.hud-panel__close:hover {
  color: var(--hud-text-primary);
  background: var(--bg-elevated);
}

.hud-panel__close:focus-visible {
  outline: 2px solid var(--hud-focus-ring);
  outline-offset: 2px;
}

/* ---- Views ---- */
.hud-panel__views {
  flex: 1;
  overflow: hidden;
  display: flex;
}

.hud-view {
  flex: 1 0 100%;
  overflow-y: auto;
  padding: var(--space-3);
  display: none;
  flex-direction: column;
  gap: var(--space-3);
}

.hud-view--active {
  display: flex;
}

/* ---- Status card ---- */
.hud-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  background: var(--bg-surface);
  border: 1px solid var(--hud-border);
  border-radius: var(--radius);
}

.hud-status__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}

.hud-status[data-state="operational"] .hud-status__dot { background: var(--color-success); }
.hud-status[data-state="degraded"]    .hud-status__dot { background: var(--color-warning); }
.hud-status[data-state="down"]        .hud-status__dot { background: var(--color-error); }

.hud-status__text {
  display: flex;
  flex-direction: column;
}

.hud-status__label {
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--hud-text-primary);
}

.hud-status__meta {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ---- Greeting + suggestions ---- */
.hud-greeting {
  color: var(--hud-text-secondary);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
}

.hud-greeting strong { color: var(--hud-text-primary); }

.hud-suggestions {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.hud-suggestion {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.625rem var(--space-2);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--hud-text-primary);
  background: var(--hud-input-bg);
  border: 1px solid var(--hud-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.hud-suggestion:hover {
  border-color: var(--accent-border);
  color: var(--accent);
}

.hud-suggestion:focus-visible {
  outline: 2px solid var(--hud-focus-ring);
  outline-offset: 2px;
}

/* ---- Primary action + doc link ---- */
.hud-cta {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.hud-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.75rem var(--space-2);
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.hud-btn--primary {
  background: var(--accent);
  color: #0F172A;
  border: 1px solid var(--accent);
}

.hud-btn--primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

.hud-btn:focus-visible {
  outline: 2px solid var(--hud-focus-ring);
  outline-offset: 2px;
}

.hud-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem;
  font-size: var(--fs-small);
  color: var(--hud-text-secondary);
  border-radius: var(--radius);
}

.hud-link:hover { color: var(--accent); }

.hud-link__icon { width: 14px; height: 14px; }

/* ---- Messages: composer ---- */
.hud-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.hud-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.hud-field__label {
  font-size: 0.75rem;
  font-weight: var(--fw-medium);
  color: var(--hud-text-secondary);
}

.hud-input,
.hud-textarea {
  width: 100%;
  background: var(--hud-input-bg);
  border: 1px solid var(--hud-border);
  border-radius: var(--radius);
  padding: 0.5rem var(--space-2);
  color: var(--hud-text-primary);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  transition: border-color var(--transition-fast);
}

.hud-textarea { resize: vertical; min-height: 92px; }

.hud-input:focus,
.hud-textarea:focus {
  outline: none;
  border-color: var(--hud-focus-ring);
}

.hud-input::placeholder,
.hud-textarea::placeholder { color: var(--text-muted); }

.hud-form__status {
  font-size: var(--fs-small);
  line-height: var(--lh-body);
  min-height: 1.2em;
}

.hud-form__status[data-state="pending"] { color: var(--hud-text-secondary); }
.hud-form__status[data-state="success"] { color: var(--color-success); }
.hud-form__status[data-state="error"]   { color: var(--color-error); }

/* ---- Messages: receipts ---- */
.hud-receipts {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.hud-receipts__heading {
  font-size: 0.75rem;
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.hud-receipt {
  padding: var(--space-2);
  background: var(--bg-surface);
  border: 1px solid var(--hud-border);
  border-left: 2px solid var(--accent);
  border-radius: var(--radius);
}

.hud-receipt__meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.hud-receipt__body {
  font-size: var(--fs-small);
  color: var(--hud-text-primary);
  line-height: var(--lh-body);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.hud-receipts__empty {
  font-size: var(--fs-small);
  color: var(--text-muted);
  line-height: var(--lh-body);
}

/* ---- Tier 2: conversation thread ---- */
.hud-thread {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  overflow-y: auto;
  flex: 1;
  min-height: 120px;
}

.hud-msg {
  max-width: 85%;
  padding: var(--space-2);
  border-radius: var(--radius);
  border: 1px solid var(--hud-border);
}

.hud-msg--visitor {
  align-self: flex-end;
  background: var(--accent-subtle-bg);
  border-color: var(--accent-border);
}

.hud-msg--operator {
  align-self: flex-start;
  background: var(--bg-surface);
}

.hud-msg__body {
  font-size: var(--fs-small);
  color: var(--hud-text-primary);
  line-height: var(--lh-body);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.hud-msg__meta {
  margin-top: 0.3rem;
  font-size: 0.7rem;
  color: var(--text-muted);
}

.hud-thread__composer {
  flex-shrink: 0;
}

/* ---- Tab bar ---- */
.hud-tabbar {
  display: flex;
  border-top: 1px solid var(--hud-border);
  flex-shrink: 0;
}

.hud-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 0.6rem;
  font-size: 0.75rem;
  font-weight: var(--fw-medium);
  color: var(--hud-text-secondary);
  background: transparent;
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.hud-tab:hover { background: var(--bg-elevated); }

.hud-tab__icon { width: 18px; height: 18px; }

.hud-tab[aria-selected="true"] { color: var(--accent); }

.hud-tab:focus-visible {
  outline: 2px solid var(--hud-focus-ring);
  outline-offset: -2px;
}

/* ---- Overlay (mobile only) ---- */
.hud-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

/* ---- Responsive: full-screen sheet on small viewports ---- */
@media (max-width: 480px) {
  .hud-overlay--visible {
    opacity: 1;
    pointer-events: auto;
  }

  .hud-panel {
    right: 0;
    bottom: 0;
    width: 100vw;
    height: 100dvh;
    border-radius: 0;
    border: none;
  }
}