.nana-conversation {
  margin-bottom: 1.5rem;
}

.nana-conversation-stage {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  position: relative;
  gap: 0;
  --stage-bubble-width: min(29rem, calc(100% - 4.75rem));
  --stage-memory-width: min(32rem, 94%);
  --stage-speech-width: min(40rem, 100%);
}

.nana-conversation__memory-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--stage-memory-width);
  min-height: 2.5rem;
  margin: 0.35rem auto 0.6rem;
  padding: 0.6rem 1.35rem;
  border-radius: 12px;
  border: 1px solid rgba(129, 140, 248, 0.14);
  background: rgba(255, 255, 255, 0.035);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  flex-shrink: 0;
}

.nana-conversation__memory-bar-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: #a8b4c7;
  letter-spacing: 0.015em;
}

/* Speech area — Bubble high, NANA lower-right (speaking geometry) */
.nana-conversation__speech-area {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: stretch;
  column-gap: 0;
  width: var(--stage-speech-width);
  max-width: 100%;
  min-height: 0;
  margin: 0 auto 1.35rem;
  padding: 0 0.15rem 0.65rem;
}

.nana-conversation__bubble-stage {
  grid-column: 1;
  width: 100%;
  height: auto;
  min-height: 0;
  margin: 0;
  padding: 0 0.25rem 0 0;
  box-sizing: border-box;
  overflow: visible;
  background: none;
  border: none;
  border-radius: 0;
  display: flex;
  justify-content: flex-end;
  align-items: flex-start;
  align-self: start;
}

.nana-conversation__nana-stage {
  grid-column: 2;
  display: flex;
  justify-content: center;
  align-items: flex-end;
  flex: 0 0 auto;
  width: auto;
  height: auto;
  min-height: 0;
  margin: 0 0 0 -0.8rem;
  padding: 0;
  box-sizing: border-box;
  overflow: visible;
  align-self: end;
  transform: translateY(0.4rem);
}

.nana-conversation__choices {
  width: var(--stage-speech-width);
  max-width: 100%;
  margin: 0.35rem auto 1.35rem;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition:
    opacity 0.28s ease-out,
    max-height 0.32s ease-out;
}

.nana-conversation__choices--visible {
  max-height: 320px;
  opacity: 1;
  overflow: visible;
}

.nana-conversation__choices--visible.nana-conversation__choices--count-1,
.nana-conversation__choices--visible.nana-conversation__choices--count-2,
.nana-conversation__choices--visible.nana-conversation__choices--count-3,
.nana-conversation__choices--visible.nana-conversation__choices--count-4 {
  display: grid;
  gap: 0.5rem;
  overflow-x: visible;
  overflow-y: visible;
}

.nana-conversation__choices--count-1 {
  grid-template-columns: minmax(0, 1fr);
}

.nana-conversation__choices--count-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.nana-conversation__choices--count-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.nana-conversation__choices--count-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.nana-conversation__choices--many {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  gap: 0.5rem;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 0.25rem;
  scrollbar-width: thin;
  scrollbar-color: rgba(148, 163, 184, 0.45) transparent;
}

.nana-conversation__choices--many::-webkit-scrollbar {
  height: 6px;
}

.nana-conversation__choices--many::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.45);
  border-radius: 999px;
}

.nana-conversation__choices .nana-conversation__direction {
  flex: 1 1 auto;
  min-width: 0;
  max-width: none;
  padding: 0.65rem 0.75rem;
  border-radius: 10px;
  border-color: rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.035);
}

.nana-conversation__choices--many .nana-conversation__direction {
  flex: 0 0 min(200px, calc(100% - 0.5rem));
  min-width: min(180px, 78%);
  max-width: min(220px, 88%);
  scroll-snap-align: start;
}

.nana-conversation__choices .nana-conversation__direction-label {
  font-size: 0.8125rem;
  margin-bottom: 0.15rem;
}

.nana-conversation__choices .nana-conversation__direction-desc {
  font-size: 0.75rem;
  line-height: 1.35;
  margin-bottom: 0.2rem;
}

.nana-conversation__choices .nana-conversation__direction-examples {
  font-size: 0.75rem;
  line-height: 1.3;
}

/* Stored history — preserved in DOM, not shown on the main stage */
.nana-conversation__messages--stored {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.nana-conversation__messages {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: 1rem 1.1rem;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  scroll-behavior: smooth;
  overscroll-behavior: contain;
}

.nana-conversation__message {
  display: flex;
  flex-direction: column;
  max-width: 92%;
  animation: nanaMsgIn 0.28s ease;
}

@keyframes nanaMsgIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.nana-conversation__message--nana {
  align-self: flex-start;
}

.nana-conversation__message--nana:has(.nana-conversation__directions) {
  align-self: stretch;
  max-width: 100%;
}

.nana-conversation__message--user {
  align-self: flex-end;
}

.nana-conversation__bubble {
  padding: 0.75rem 0.95rem;
  border-radius: 14px;
  font-size: 0.9375rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.nana-conversation__message--nana .nana-conversation__bubble {
  background: rgba(108, 99, 255, 0.14);
  border: 1px solid rgba(108, 99, 255, 0.22);
  color: #e2e8f0;
  border-bottom-left-radius: 4px;
}

.nana-conversation__message--user .nana-conversation__bubble {
  background: rgba(59, 130, 246, 0.18);
  border: 1px solid rgba(59, 130, 246, 0.28);
  color: #f1f5f9;
  border-bottom-right-radius: 4px;
}

.nana-conversation__typing {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.65rem 0.95rem;
  align-self: flex-start;
}

.nana-conversation__typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #94a3b8;
  animation: nanaTyping 1.2s ease-in-out infinite;
}

.nana-conversation__typing-dot:nth-child(2) {
  animation-delay: 0.15s;
}

.nana-conversation__typing-dot:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes nanaTyping {
  0%,
  60%,
  100% {
    opacity: 0.35;
    transform: translateY(0);
  }
  30% {
    opacity: 1;
    transform: translateY(-3px);
  }
}

.nana-conversation__directions {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  gap: 0.65rem;
  margin-top: 0.35rem;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 0.35rem;
  scrollbar-width: thin;
  scrollbar-color: rgba(148, 163, 184, 0.45) transparent;
}

.nana-conversation__directions::-webkit-scrollbar {
  height: 6px;
}

.nana-conversation__directions::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.45);
  border-radius: 999px;
}

.nana-conversation__direction {
  flex: 0 0 min(280px, calc(100% - 1.5rem));
  scroll-snap-align: start;
  scroll-snap-stop: normal;
  min-width: min(240px, 78vw);
  max-width: min(300px, 88vw);
  text-align: left;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  color: inherit;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  font-family: inherit;
}

.nana-conversation__direction:hover:not(:disabled) {
  border-color: rgba(108, 99, 255, 0.45);
  background: rgba(108, 99, 255, 0.1);
}

.nana-conversation__direction:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.nana-conversation__direction-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: #c4b5fd;
  margin-bottom: 0.25rem;
}

.nana-conversation__direction-desc {
  display: block;
  font-size: 0.8125rem;
  color: #94a3b8;
  line-height: 1.45;
  margin-bottom: 0.4rem;
}

.nana-conversation__direction-examples {
  display: block;
  font-size: 0.8125rem;
  color: #cbd5e1;
  font-style: italic;
}

.nana-conversation__form {
  display: flex;
  gap: 0.5rem;
  padding: 0.85rem 0 1rem;
  flex-shrink: 0;
}

.nana-conversation__input {
  flex: 1;
  min-width: 0;
  padding: 0.75rem 0.9rem;
  font-size: 0.9375rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  color: #f1f5f9;
  outline: none;
  transition: border-color 0.2s;
}

.nana-conversation__input:focus {
  border-color: #6c63ff;
}

.nana-conversation__input:disabled {
  opacity: 0.6;
}

.nana-conversation__send {
  flex-shrink: 0;
  padding: 0.75rem 1.1rem;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, #6c63ff, #3b82f6);
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}

.nana-conversation__send:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.nana-conversation__error {
  margin: 0 0 0.5rem;
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fecaca;
  font-size: 0.8125rem;
  flex-shrink: 0;
}

.nana-conversation__divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 1.5rem;
  color: #64748b;
  font-size: 0.8125rem;
}

.nana-conversation__divider::before,
.nana-conversation__divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
}

@media (max-width: 640px) {
  .nana-conversation-stage {
    --stage-bubble-width: min(26rem, calc(100% - 4.5rem));
    --stage-memory-width: min(100%, 94%);
    --stage-speech-width: min(100%, 94%);
  }

  .nana-conversation__memory-bar {
    margin: 0.25rem auto 0.5rem;
    padding: 0.5rem 1rem;
    min-height: 2.35rem;
  }

  .nana-conversation__memory-bar-label {
    font-size: 0.75rem;
  }

  .nana-conversation__speech-area {
    margin-bottom: 1.1rem;
    padding-bottom: 0.5rem;
  }

  .nana-conversation__nana-stage {
    margin-left: -0.6rem;
    transform: translateY(0.3rem);
  }

  .nana-conversation__choices {
    margin-bottom: 1.15rem;
  }

  .nana-conversation__choices--count-3,
  .nana-conversation__choices--count-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .nana-conversation__choices--visible {
    max-height: 360px;
  }

  .nana-conversation__choices .nana-conversation__direction {
    padding: 0.6rem 0.65rem;
  }

  .nana-conversation__form {
    flex-direction: column;
    padding-top: 0.65rem;
  }

  .nana-conversation__send {
    width: 100%;
  }
}