:root {
  --bubble-blue:   #1B93FF;
  --bubble-gray:   #E9E9EB;
  --bubble-green:  #34C759;
  --bubble-purple: #AF52DE;
}

.chat {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.4rem;
  padding: 1rem;
  overflow-y: scroll;
  max-height: 100%;
  position: relative;
  scrollbar-width: none;
}

.chat::-webkit-scrollbar {
  display: none;
}

.chat.is-scrolled {
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 80px);
  mask-image: linear-gradient(to bottom, transparent 0%, black 80px);
}

.chat::after {
  content: '';
  display: block;
  min-height: 150px;
  flex-shrink: 0;
}

.bubble-right,
.bubble-left,
.bubble-left-2,
.bubble-left-3 {
  max-width: 65%;
  padding: 0.55em 0.9em;
  border-radius: 1.2em;
  font-size: 0.9em;
  line-height: 1.4;
  position: relative;
  word-wrap: break-word;
}

.bubble-right {
  align-self: flex-end;
  background-color: var(--bubble-blue);
  color: #ffffff;
  border-bottom-right-radius: 0.25em;
}

.bubble-right::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: -0.45em;
  width: 0.5em;
  height: 0.75em;
  background-color: var(--bubble-blue);
  clip-path: polygon(0 0, 0% 100%, 100% 100%);
}

.bubble-left,
.bubble-left-2,
.bubble-left-3 {
  align-self: flex-start;
  border-bottom-left-radius: 0.25em;
}

.bubble-left::after,
.bubble-left-2::after,
.bubble-left-3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: -0.45em;
  width: 0.5em;
  height: 0.75em;
  clip-path: polygon(100% 0, 0% 100%, 100% 100%);
}

.bubble-left {
  background-color: var(--bubble-gray);
  color: #000000;
}

.bubble-left::after {
  background-color: var(--bubble-gray);
}

.bubble-left-2 {
  background-color: var(--bubble-green);
  color: #ffffff;
}

.bubble-left-2::after {
  background-color: var(--bubble-green);
}

.bubble-left-3 {
  background-color: var(--bubble-purple);
  color: #ffffff;
}

.bubble-left-3::after {
  background-color: var(--bubble-purple);
}

/* Extra space above bubbles that have reactions */
.bubble-right.has-reactions,
.bubble-left.has-reactions,
.bubble-left-2.has-reactions,
.bubble-left-3.has-reactions {
  margin-top: 1.2em;
}

/* Reaction pill container — anchored to top corner of bubble, overlapping slightly */
.bubble-reactions {
  position: absolute;
  top: -0.75em;
  display: flex;
  flex-direction: row;
  gap: 3px;
}

.bubble-right .bubble-reactions {
  left: 6px;
}

.bubble-left .bubble-reactions,
.bubble-left-2 .bubble-reactions,
.bubble-left-3 .bubble-reactions {
  right: 6px;
}

@keyframes reaction-in {
  from { opacity: 0; transform: scale(0.4); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes reaction-out {
  from { opacity: 1; transform: scale(1); }
  to   { opacity: 0; transform: scale(0.4); }
}

.reaction-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: 999px;
  padding: 2px 6px;
  font-size: 0.75em;
  line-height: 1;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
  animation: reaction-in 0.2s ease forwards;
}

.reaction-pill.is-hiding {
  animation: reaction-out 0.2s ease forwards;
}

/* Typing indicator */

@keyframes typing-dot {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-5px); }
}

.typing-indicator {
  display: flex;
  gap: 0.3em;
  align-items: center;
  padding: 0.15em 0;
}

.typing-indicator span {
  display: inline-block;
  width: 0.45em;
  height: 0.45em;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.7;
  animation: typing-dot 1.2s infinite ease-in-out;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

/* When typing: show indicator, hide text */
.is-typing .bubble-text { display: none; }
.is-typing .typing-indicator { display: flex; }

/* After text is revealed */
.is-typing.text-revealed .bubble-text { display: block; }
.is-typing.text-revealed .typing-indicator { display: none; }

/* Images inside bubbles */
.bubble-right img,
.bubble-left img,
.bubble-left-2 img,
.bubble-left-3 img {
  display: block;
  max-width: 100%;
  border-radius: 0.6em;
}

/* Strip margins/padding from Quarto cell wrappers and lone <p> tags */
.bubble-right p:only-child,
.bubble-left p:only-child,
.bubble-left-2 p:only-child,
.bubble-left-3 p:only-child,
.bubble-right .cell,
.bubble-left .cell,
.bubble-left-2 .cell,
.bubble-left-3 .cell,
.bubble-right .cell-output-display,
.bubble-left .cell-output-display,
.bubble-left-2 .cell-output-display,
.bubble-left-3 .cell-output-display,
.bubble-right figure,
.bubble-left figure,
.bubble-left-2 figure,
.bubble-left-3 figure {
  margin: 0;
  padding: 0;
}

/* Fragment animation */

.reveal .slides section .fragment.bubble-right,
.reveal .slides section .fragment.bubble-left,
.reveal .slides section .fragment.bubble-left-2,
.reveal .slides section .fragment.bubble-left-3 {
  opacity: 0;
  visibility: visible;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.reveal .slides section .fragment.bubble-right.visible,
.reveal .slides section .fragment.bubble-left.visible,
.reveal .slides section .fragment.bubble-left-2.visible,
.reveal .slides section .fragment.bubble-left-3.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 0.25s ease, transform 0.25s ease;
}