:root {
  --yu-ai-bg: rgba(0, 0, 0, 0.35);
  --yu-ai-bg-inner: rgba(29, 29, 29, 0.14);
  --yu-ai-border: #c1c1c16e;
  --yu-ai-inner-border: #c1c1c16e;
  --yu-ai-text: #dedede;
  --yu-ai-muted: rgba(255, 255, 255, 0.45);
  --yu-ai-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

#yu-ai-widget-root {
  position: fixed;
  right: 6vw;
  bottom: 10%;
  z-index: 12000;
  pointer-events: none;
}

#yu-ai-widget-root.is-desktop-project-detail {
  right: 7vw;
  bottom: calc(10% + 28px);
}

#yu-ai-widget-root.is-desktop-project-detail .yu-ai-pill,
#yu-ai-widget-root.is-mobile-project-detail .yu-ai-pill {
  border: none;
  background: rgba(29, 29, 29, 0.32);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

#yu-ai-widget-root.is-desktop-project-detail .yu-ai-pill:hover,
#yu-ai-widget-root.is-mobile-project-detail .yu-ai-pill:hover {
  border: none;
  color: #fff;
  background: rgba(29, 29, 29, 0.46);
}

#yu-ai-widget-root.is-desktop-project-detail
  .yu-ai-widget.is-detail-pill-compact:not(.is-open),
#yu-ai-widget-root.is-mobile-project-detail
  .yu-ai-widget.is-detail-pill-compact:not(.is-open) {
  width: 51px;
}

#yu-ai-widget-root.is-desktop-project-detail
  .yu-ai-widget.is-detail-pill-compact:not(.is-open)
  .yu-ai-pill,
#yu-ai-widget-root.is-mobile-project-detail
  .yu-ai-widget.is-detail-pill-compact:not(.is-open)
  .yu-ai-pill {
  width: 51px;
  height: 51px;
  border-radius: 50%;
  padding: 0;
  gap: 0;
  justify-content: center;
}

#yu-ai-widget-root.is-desktop-project-detail
  .yu-ai-widget.is-detail-pill-compact:not(.is-open)
  .yu-ai-pill
  #yuAiGreetingText,
#yu-ai-widget-root.is-mobile-project-detail
  .yu-ai-widget.is-detail-pill-compact:not(.is-open)
  .yu-ai-pill
  #yuAiGreetingText {
  display: none;
}

.yu-ai-widget {
  pointer-events: auto;
  color: var(--yu-ai-text);
  font-family: "Inter", "Noto Sans TC", sans-serif;
  letter-spacing: 1.1px;
}

.yu-ai-pill {
  height: 51px;
  border-radius: 25.5px;
  border: 1px solid var(--yu-ai-inner-border);
  background: rgba(29, 29, 29, 0.32);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 18px 0 14px;
  color: var(--yu-ai-muted);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: var(--yu-ai-shadow);
}

.yu-ai-pill:hover {
  border-color: #fff;
  color: #fff;
  background: rgba(29, 29, 29, 0.46);
}

.yu-ai-star {
  width: 19px;
  height: 19px;
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.yu-ai-panel {
  width: 337px;
  border-radius: 32px;
  border: 1px solid var(--yu-ai-border);
  background: var(--yu-ai-bg);
  backdrop-filter: blur(35.3px);
  box-shadow: var(--yu-ai-shadow);
  padding: 8px 7px;
  min-height: 67px;
  position: relative;
  display: none;
}

.yu-ai-widget.is-open .yu-ai-pill {
  display: none;
}

.yu-ai-widget.is-open .yu-ai-panel {
  display: block;
}

.yu-ai-content {
  margin: 6px 8px 6px;
  max-height: 210px;
  overflow-y: auto;
  padding-right: 6px;
}

.yu-ai-content.is-empty {
  margin: 0;
  padding: 0;
}

.yu-ai-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 10px;
}

.yu-ai-body {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
}
.yu-ai-row.user {
  margin-top: 25px;
}

.yu-ai-row.user .yu-ai-text {
  opacity: 0.56;
}

.yu-ai-text {
  font-size: 14px;
  line-height: 1.5;
  word-break: break-word;
  white-space: pre-wrap;
}

.yu-ai-topic-chip {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  max-width: 100%;
  height: 26px;
  padding: 0 15px;
  border-radius: 13px;
  background: rgba(217, 217, 217, 0.3);
  color: #dedede;
  font-size: 9.7px;
  letter-spacing: 0.96px;
  line-height: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.yu-ai-nav-chip {
  margin: 4px 0 8px 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 92px;
  height: 26px;
  border-radius: 13px;
  background: rgba(217, 217, 217, 0.3);
  color: var(--yu-ai-text);
  font-size: 9.7px;
  letter-spacing: 0.96px;
}

.yu-ai-nav-chip.is-hidden {
  display: none;
}

.yu-ai-suggestions {
  margin: 2px 8px 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.yu-ai-suggestions.is-empty {
  display: none;
}

.yu-ai-suggestion-btn {
  width: 100%;
  min-height: 30px;
  border-radius: 15px;
  border: 1px solid rgba(198, 198, 198, 0.6);
  background: rgba(227, 227, 227, 0.08);
  color: #d9d9d9;
  font-size: 12px;
  letter-spacing: 0.6px;
  text-align: left;
  padding: 6px 12px;
  cursor: pointer;
  transition:
    border-color 0.2s ease,
    background 0.2s ease,
    color 0.2s ease;
}

.yu-ai-suggestion-btn:hover {
  border-color: rgba(255, 255, 255, 0.9);
  background: rgba(227, 227, 227, 0.16);
  color: #ffffff;
}

.yu-ai-suggestion-btn:disabled {
  opacity: 0.45;
  cursor: default;
}

.yu-ai-input-wrap {
  position: relative;
  height: 51px;
  border-radius: 25.5px;
  border: 1px solid var(--yu-ai-inner-border);
  background: var(--yu-ai-bg-inner);
  display: flex;
  align-items: center;
  padding: 0 44px 0 16px;
  margin: 0 auto;
}

.yu-ai-input {
  width: 100%;
  background: transparent;
  border: 0;
  color: #fff;
  font-size: 14px;
  letter-spacing: 1.2px;
  outline: none;
}

.yu-ai-send {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid rgba(198, 198, 198, 0.85);
  background: rgba(227, 227, 227, 0.16);
  color: #dedede;
  cursor: pointer;
}

.yu-ai-row.is-loading .yu-ai-star {
  animation: yuAiPulseScale 1.1s ease-in-out infinite;
}

.yu-ai-reference-list {
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.yu-ai-reference-item {
  font-size: 11px;
  color: #b6b6b6;
  opacity: 0.8;
}

@keyframes yuAiPulse {
  0% {
    opacity: 0.3;
    transform: translateY(-50%) scale(0.92);
  }
  50% {
    opacity: 1;
    transform: translateY(-50%) scale(1.06);
  }
  100% {
    opacity: 0.3;
    transform: translateY(-50%) scale(0.92);
  }
}

@keyframes yuAiPulseScale {
  0% {
    opacity: 0.3;
    transform: scale(0.92);
  }
  50% {
    opacity: 1;
    transform: scale(1.06);
  }
  100% {
    opacity: 0.3;
    transform: scale(0.92);
  }
}

@media (max-width: 900px) {
  #yu-ai-widget-root {
    left: 0;
    right: 0;
    bottom: calc(env(safe-area-inset-bottom, 0px) + 15px);
    width: 100%;
    padding: 0 14px;
    box-sizing: border-box;
  }

  #yu-ai-widget-root.is-mobile-project-detail {
    bottom: calc(env(safe-area-inset-bottom, 0px) + 50px);
  }

  .yu-ai-widget,
  .yu-ai-panel {
    min-height: 67px;
    width: min(337px, calc(100vw - 28px));
  }

  .yu-ai-widget {
    width: 51px;
    margin-left: auto;
    margin-right: 0;
  }

  .yu-ai-widget.is-open {
    width: min(337px, calc(100vw - 28px));
    margin-left: auto;
    margin-right: auto;
  }

  .yu-ai-widget.is-open .yu-ai-panel {
    width: 100%;
  }

  .yu-ai-pill {
    width: 51px;
    height: 51px;
    border-radius: 50%;
    padding: 0;
    gap: 0;
    justify-content: center;
  }

  .yu-ai-pill #yuAiGreetingText {
    display: none;
  }

  #yu-ai-widget-root.is-mobile-project-detail
    .yu-ai-widget:not(.is-open):not(.is-detail-pill-compact) {
    width: fit-content;
    max-width: calc(100vw - 28px);
  }

  #yu-ai-widget-root.is-mobile-project-detail
    .yu-ai-widget:not(.is-open):not(.is-detail-pill-compact)
    .yu-ai-pill {
    width: fit-content;
    max-width: calc(100vw - 28px);
    border-radius: 25.5px;
    padding: 0 18px 0 14px;
    gap: 12px;
    justify-content: flex-start;
  }

  #yu-ai-widget-root.is-mobile-project-detail
    .yu-ai-widget:not(.is-open):not(.is-detail-pill-compact)
    .yu-ai-pill
    #yuAiGreetingText {
    display: inline;
  }

  .yu-ai-content {
    max-height: 60vh;
  }

  /* Prevent iOS Safari auto-zoom when focusing text input. */
  .yu-ai-input {
    font-size: 16px;
    line-height: 1.35;
  }
}