/* Chat Panel UI (BEM, variables, responsive, light/dark) */
:root {
  --chat-panel-width: 320px;
  --chat-window-width: 340px;
  --chat-gap: 12px;
  --chat-space-xxs: 4px;
  --chat-space-xs: 8px;
  --chat-space-sm: 12px;
  --chat-space-md: 16px;
  --chat-space-lg: 24px;
  --chat-radius: 12px;
  --chat-shadow: 0 6px 16px rgba(0,0,0,0.12);
  --chat-bg: #ffffff;
  --chat-text: #1f2937;
  --chat-muted: #6b7280;
  --chat-border: #e5e7eb;
  --chat-accent: #2563eb;
  --chat-online: #16a34a;
  --chat-bubble-bg: #2563eb;
  --chat-bubble-text: #ffffff;
}

/* Dark mode: prefers-color-scheme and opt-in [data-theme="dark"] */
@media (prefers-color-scheme: dark) {
  :root {
    --chat-bg: #0f172a;
    --chat-text: #e5e7eb;
    --chat-muted: #9ca3af;
    --chat-border: #1f2937;
    --chat-accent: #60a5fa;
    --chat-bubble-bg: #60a5fa;
    --chat-bubble-text: #111827;
    --chat-shadow: 0 6px 16px rgba(0,0,0,0.45);
  }
}
[data-theme="dark"] {
  --chat-bg: #0f172a;
  --chat-text: #e5e7eb;
  --chat-muted: #9ca3af;
  --chat-border: #1f2937;
  --chat-accent: #60a5fa;
  --chat-bubble-bg: #60a5fa;
  --chat-bubble-text: #111827;
  --chat-shadow: 0 6px 16px rgba(0,0,0,0.45);
}

/* Container */
.chat-panel {
  position: fixed;
  right: 0px;
  bottom: var(--chat-space-md);
  width: var(--chat-panel-width);
  max-width: 28vw;
  background: var(--chat-bg);
  color: var(--chat-text);
  border: 1px solid var(--chat-border);
  border-radius: var(--chat-radius);
  box-shadow: var(--chat-shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform 220ms ease, opacity 220ms ease;
  will-change: transform, opacity;
  z-index: 6000;
}

/* Hard override to guarantee visibility when JS forces it */
.chat-panel.chat-panel--force {
  display: block !important;
  visibility: visible !important;
  opacity: 1 !important;
}

.chat-panel--minimized {
  height: auto;
  opacity: 0.98;
  width: var(--chat-panel-width);
}

/* Header */
.chat-panel__title {
  font-weight: 600;
}
.chat-panel__actions {
  display: flex;
  gap: 2px; /* match window buttons spacing */
}
.chat-panel__action {
  border: 1px solid var(--chat-border);
  background: transparent;
  color: var(--chat-text);
  padding: 0; /* unify with chat-window buttons */
  border-radius: 8px;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.chat-panel__action:hover {
  background: var(--chat-border);
}
/* Ensure 2px spacing even without actions container assumptions */
.chat-panel__header .chat-panel__action + .chat-panel__action,
.chat-panel__header .chat-panel__action + button,
.chat-panel__header button + .chat-panel__action,
.chat-panel__header button + button {
  margin-left: 2px;
}

/* Body */
.chat-panel__body {
  display: none;
  height: 396px;
}
.chat-panel--open .chat-panel__body {
  display: block;
}
/* Minimized desktop: show header card only */
.chat-panel--minimized .card-body { display: none !important; }
.chat-panel--minimized .card-header { border-bottom: none; }
.chat-panel--minimized .card { box-shadow: var(--chat-shadow); }
/* Bubble hidden on desktop; shown on mobile only */
.chat-panel__bubble { display: none; }
.chat-panel--minimized .chat-panel__bubble { display: none; }

/* Fixed container for chat windows, stacked from right to left */
#chat-windows.chat-windows {
  position: fixed;
  bottom: var(--chat-space-md);
  right: calc(var(--chat-panel-width) + var(--chat-gap));
  display: flex;
  flex-direction: row-reverse;
  align-items: flex-end;
  gap: var(--chat-gap);
  max-width: calc(100vw - var(--chat-panel-width) - (var(--chat-gap) * 2));
  overflow-x: auto;
}

/* Chat window sizing and animation */
.chat-window {
  width: var(--chat-window-width);
  background: var(--chat-bg);
  color: var(--chat-text);
  border: 1px solid var(--chat-border);
  border-radius: var(--chat-radius);
  box-shadow: var(--chat-shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateX(24px);
  opacity: 0;
  transition: transform 220ms ease, opacity 220ms ease;
}
.chat-window--visible { transform: translateX(0); opacity: 1; }

.chat-panel__search {
  padding: var(--chat-space-sm) var(--chat-space-md) var(--chat-space-xs);
}
.chat-panel__search-input {
  width: 100%;
  border: 1px solid var(--chat-border);
  border-radius: 8px;
  padding: var(--chat-space-xs) var(--chat-space-sm);
  background: var(--chat-bg);
  color: var(--chat-text);
}

.chat-panel__list {
  list-style: none;
  padding: 0 var(--chat-space-md) var(--chat-space-md);
  margin: 0;
}
.chat-panel__list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--chat-space-xs) 0;
  border-bottom: 1px dashed var(--chat-border);
}
.chat-panel__user {
  display: flex;
  align-items: center;
  gap: var(--chat-space-sm);
}
.chat-panel__avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--chat-border);
  color: var(--chat-muted);
  font-weight: 600;
}
.chat-panel__name {
  font-size: 0.95rem;
}

/* Online status indicator */
.chat-panel__status {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--chat-bg);
  background: transparent;
}
.chat-status-online {
  background: var(--chat-online);
}

/* Bubble (minimized) */
.chat-panel__bubble {
  position: fixed;
  right: var(--chat-space-md);
  bottom: var(--chat-space-md);
  display: none;
  align-items: center;
  gap: var(--chat-space-xs);
  background: var(--chat-bubble-bg);
  color: var(--chat-bubble-text);
  padding: var(--chat-space-xs) var(--chat-space-md);
  border-radius: 999px;
  box-shadow: var(--chat-shadow);
  z-index: 6000;
}
.chat-panel--minimized .chat-panel__bubble {
  display: none;
}
.chat-panel__bubble-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--chat-online);
}

/* Chat windows container and window card */
.chat-windows {
  position: fixed;
  bottom: var(--chat-space-md);
  right: calc(var(--chat-panel-width) + var(--chat-gap));
  display: flex;
  flex-direction: row-reverse;
  align-items: flex-end;
  gap: var(--chat-space-sm);
  z-index: 4500;
}
.chat-window {
  width: var(--chat-window-width);
  background: var(--chat-bg);
  color: var(--chat-text);
  border: 1px solid var(--chat-border);
  border-radius: var(--chat-radius);
  box-shadow: var(--chat-shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.chat-window__header, .chat-panel__header {
  padding: var(--chat-space-sm) var(--chat-space-md);
  border-bottom: 1px solid var(--chat-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #eef6f6;
  cursor: pointer;
}
.chat-window__actions {
  display: flex;
  gap: 2px; /* precise spacing between buttons */
}
.chat-window__action {
  border: 1px solid var(--chat-border);
  background: transparent;
  color: var(--chat-text);
  padding: 0;
  border-radius: 8px;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.chat-window__action:hover {
  background: var(--chat-border);
}
/* Fallback: apply same style to any header buttons if markup lacks .chat-window__action */
.chat-window__header .btn,
.chat-window__header button {
  border: 1px solid var(--chat-border);
  background: transparent;
  color: var(--chat-text);
  padding: 0;
  border-radius: 8px;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.chat-window__header .btn + .btn,
.chat-window__header button + button,
.chat-window__header .btn + button,
.chat-window__header button + .btn {
  margin-left: 2px; /* ensure 2px gap even without actions container */
}
.chat-window__header .btn:hover,
.chat-window__header button:hover {
  background: var(--chat-border);
}
.chat-window__body {
  height: 300px;
  overflow-y: auto;
  padding: var(--chat-space-sm) var(--chat-space-md);
}
.chat-window__footer {
  padding: var(--chat-space-sm) var(--chat-space-md);
  border-top: 1px solid var(--chat-border);
  background: #f5f9f9;
}

/* Messages */
.chat-message {
  display: flex;
  margin-bottom: var(--chat-space-sm);
}
/* Send button color override */
.chat-window__footer .chat-send {
  background-color: #16C4C0 !important;
  border-color: #16C4C0 !important;
  color: #ffffff !important;
}
.chat-window__footer .chat-send:hover,
.chat-window__footer .chat-send:focus {
  background-color: #12ada9 !important;
  border-color: #12ada9 !important;
}
.chat-message__bubble {
  background: #ffffff;
  color: var(--chat-text);
  padding: var(--chat-space-xs) var(--chat-space-sm);
  border-radius: 10px;
  max-width: 70%;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
  hyphens: auto;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
[data-theme="dark"] .chat-message__bubble {
  background: #1f2937;
}

.chat-input {
    background-color: #fff !important;
    border-radius: 0.25rem !important;
    border-top-right-radius: 0 !important;
    border-bottom-right-radius: 0 !important;
    border: 1px solid #ced4da !important;
}


/* Responsiveness */
@media (max-width: 767.98px) {
  :root { --chat-panel-width: 95vw; --chat-window-width: 90vw; }
  .chat-panel {
    right: var(--chat-space-sm);
    left: auto;
    bottom: var(--chat-space-sm);
    transform: none;
  }
  .chat-panel--open { transform: none; }
  .chat-panel__bubble { right: var(--chat-space-sm); left: auto; transform: none; }
  .chat-panel--minimized .chat-panel__bubble { display: inline-flex; }
  .chat-windows { right: calc(var(--chat-space-sm) + var(--chat-panel-width)); left: auto; }
}

@media (min-width: 768px) and (max-width: 1199.98px) {
  :root { --chat-panel-width: 70vw; }
}

@media (min-width: 1200px) {
  :root { --chat-panel-width: 320px; }
}