:root {
  --chat-widget-z-index: 1200;
  --chat-widget-right: 1rem;
  --chat-widget-bottom: 1rem;
  --chat-widget-width: min(22rem, calc(100vw - 2rem));
  --chat-widget-height: 32rem;
  --chat-widget-radius: 1rem;
  --chat-widget-shadow: 0 18px 42px rgba(10, 30, 72, 0.2);
  --chat-widget-border: rgba(59, 130, 246, 0.25);
  --chat-widget-bg: #ffffff;
  --chat-widget-text: #0f172a;
  --chat-widget-muted: #5b647a;
  --chat-widget-primary: #1d4ed8;
  --chat-widget-primary-hover: #1e40af;
  --chat-widget-action-bg: rgba(255, 255, 255, 0.92);
  --chat-widget-action-border: rgba(59, 130, 246, 0.25);
  --chat-widget-action-text: #0f172a;
  --chat-widget-action-hover-bg: rgba(219, 234, 254, 0.92);
}

html[data-theme="dark"] {
  --chat-widget-shadow: 0 18px 42px rgba(0, 0, 0, 0.45);
  --chat-widget-border: rgba(148, 163, 184, 0.34);
  --chat-widget-bg: #0f172a;
  --chat-widget-text: #e2e8f0;
  --chat-widget-muted: #cbd5e1;
  --chat-widget-primary: #60a5fa;
  --chat-widget-primary-hover: #93c5fd;
  --chat-widget-action-bg: rgba(15, 23, 42, 0.92);
  --chat-widget-action-border: rgba(96, 165, 250, 0.38);
  --chat-widget-action-text: #f8fafc;
  --chat-widget-action-hover-bg: rgba(30, 41, 59, 0.96);
}

.chat-widget {
  position: fixed;
  right: var(--chat-widget-right);
  bottom: var(--chat-widget-bottom);
  z-index: var(--chat-widget-z-index);
  font-family: "Noto Sans TC", "Microsoft JhengHei", sans-serif;
}

.chat-widget__launcher {
  display: block;
  width: 7rem;
  height: auto;
  border: none;
  border-radius: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
  transition: transform 0.25s ease, filter 0.25s ease;
  filter: drop-shadow(0 4px 12px rgba(10, 30, 72, 0.25));
}

.chat-widget__launcher img {
  display: block;
  width: 100%;
  height: auto;
  pointer-events: none;
}

.chat-widget__launcher:hover {
  transform: scale(1.1) translateY(-2px);
  filter: drop-shadow(0 8px 20px rgba(10, 30, 72, 0.35));
}

.chat-widget__launcher:active {
  transform: scale(0.95);
}

html[data-theme="dark"] .chat-widget__launcher {
  filter: drop-shadow(0 4px 14px rgba(0, 0, 0, 0.5));
}

html[data-theme="dark"] .chat-widget__launcher:hover {
  filter: drop-shadow(0 8px 22px rgba(0, 0, 0, 0.6));
}

.chat-widget__launcher:focus-visible,
.chat-widget__send:focus-visible,
.chat-widget__action:focus-visible,
.chat-widget__social:focus-visible {
  outline: 2px solid var(--chat-widget-primary);
  outline-offset: 2px;
}

.chat-widget__panel {
  display: none;
  width: var(--chat-widget-width);
  height: var(--chat-widget-height);
  margin-bottom: 0.75rem;
  border-radius: var(--chat-widget-radius);
  border: 1px solid var(--chat-widget-border);
  background: var(--chat-widget-bg);
  color: var(--chat-widget-text);
  box-shadow: var(--chat-widget-shadow);
  overflow: hidden;
}

.chat-widget.is-open .chat-widget__panel {
  display: grid;
  grid-template-rows: auto 1fr auto auto;
}

.chat-widget__header {
  padding: 0.75rem 0.9rem;
  background: rgba(29, 78, 216, 0.1);
  border-bottom: 1px solid var(--chat-widget-border);
}

.chat-widget__title {
  margin: 0;
  font-size: 0.96rem;
}

.chat-widget__desc {
  margin: 0.25rem 0 0;
  color: var(--chat-widget-muted);
  font-size: 0.78rem;
}

.chat-widget__messages {
  padding: 0.8rem;
  display: grid;
  gap: 0.6rem;
  overflow-y: auto;
  align-content: start;
  background: linear-gradient(180deg, rgba(148, 163, 184, 0.08), rgba(148, 163, 184, 0.02));
}

.chat-widget__bubble {
  max-width: 92%;
  border-radius: 0.75rem;
  padding: 0.58rem 0.65rem;
  font-size: 0.86rem;
  line-height: 1.42;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.2rem;
}

.chat-widget__bubble-text {
  width: 100%;
  word-break: break-word;
  line-height: 1.58;
}

.chat-widget__rich-paragraph,
.chat-widget__rich-list {
  margin: 0;
}

.chat-widget__rich-paragraph + .chat-widget__rich-paragraph,
.chat-widget__rich-paragraph + .chat-widget__rich-list,
.chat-widget__rich-list + .chat-widget__rich-paragraph,
.chat-widget__rich-list + .chat-widget__rich-list {
  margin-top: 0.55rem;
}

.chat-widget__rich-paragraph {
  color: inherit;
}

.chat-widget__rich-list {
  padding-left: 1.2rem;
}

.chat-widget__rich-list--unordered {
  list-style: disc;
}

.chat-widget__rich-list--ordered {
  list-style: decimal;
  padding-left: 1.35rem;
}

.chat-widget__rich-list li + li {
  margin-top: 0.45rem;
}

.chat-widget__rich-list li {
  line-height: 1.58;
}

.chat-widget__rich-list li::marker {
  color: var(--chat-widget-primary);
  font-weight: 700;
}

.chat-widget__bubble-text strong {
  font-weight: 700;
}

.chat-widget__bubble-text a {
  color: var(--chat-widget-primary);
  text-decoration: underline;
}

.chat-widget__bubble-text a:hover {
  text-decoration: none;
}

.chat-widget__bubble-time {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.68rem;
  opacity: 0.85;
  color: inherit;
  line-height: 1.2;
}

.chat-widget__bubble--user .chat-widget__bubble-time {
  color: rgba(255, 255, 255, 0.85);
}

.chat-widget__bubble--system,
.chat-widget__bubble--agent {
  background: rgba(148, 163, 184, 0.2);
  color: inherit;
}

.chat-widget__bubble--user {
  margin-left: auto;
  color: #fff;
  background: var(--chat-widget-primary);
}

.chat-widget__bubble--typing {
  max-width: 8rem;
}

.chat-widget__typing {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 1.2rem;
}

.chat-widget__typing-text {
  font-size: 0.72rem;
  color: var(--chat-widget-muted);
  white-space: nowrap;
}

.chat-widget__typing-dots {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.chat-widget__typing-dots span {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 999px;
  background: var(--chat-widget-primary);
  opacity: 0.35;
  animation: chat-widget-typing 1.1s infinite ease-in-out;
}

.chat-widget__typing-dots span:nth-child(2) {
  animation-delay: 0.16s;
}

.chat-widget__typing-dots span:nth-child(3) {
  animation-delay: 0.32s;
}

.chat-widget__actions {
  display: flex;
  gap: 0.5rem;
  padding: 0.5rem 0.8rem 0;
}

.chat-widget__action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.25rem;
  border: 1px solid var(--chat-widget-action-border);
  background: var(--chat-widget-action-bg);
  color: var(--chat-widget-action-text);
  border-radius: 999px;
  padding: 0.35rem 0.65rem;
  font-size: 0.76rem;
  font-weight: 600;
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.12);
  cursor: pointer;
}

.chat-widget__action:hover {
  background: var(--chat-widget-action-hover-bg);
  color: var(--chat-widget-action-text);
}

.chat-widget__social-links {
  display: flex;
  gap: 0.45rem;
  padding: 0.48rem 0.8rem 0;
}

.chat-widget__social {
  font-size: 0.72rem;
  text-decoration: none;
  border: 1px solid var(--chat-widget-border);
  border-radius: 999px;
  padding: 0.3rem 0.52rem;
  color: inherit;
}

.chat-widget__composer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.45rem;
  padding: 0.68rem 0.8rem 0.75rem;
}

.chat-widget__input {
  border: 1px solid var(--chat-widget-border);
  border-radius: 0.65rem;
  padding: 0.48rem 0.6rem;
  font-size: 0.86rem;
  background: transparent;
  color: inherit;
}

.chat-widget__send {
  border: none;
  border-radius: 0.65rem;
  padding: 0.48rem 0.75rem;
  color: #fff;
  background: var(--chat-widget-primary);
  cursor: pointer;
  font-size: 0.8rem;
}

.chat-widget__send:disabled,
.chat-widget__send.chat-widget__send--disabled {
  opacity: 0.55;
  cursor: not-allowed;
  background: var(--chat-widget-muted, #94a3b8);
  color: rgba(255, 255, 255, 0.9);
}

.chat-widget__input:disabled {
  opacity: 0.72;
  cursor: wait;
}

.chat-widget__provider-note {
  margin: 0;
  padding: 0 0.85rem 0.65rem;
  color: var(--chat-widget-muted);
  font-size: 0.7rem;
  line-height: 1.4;
  text-align: center;
}

@media (max-width: 640px) {
  .chat-widget {
    right: 0.5rem;
    bottom: 0.5rem;
  }

  .chat-widget__launcher {
    width: 5.5rem;
  }

  .chat-widget__panel {
    width: min(22rem, calc(100vw - 1.5rem));
    height: min(34rem, 68vh);
  }

  .chat-widget__actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
  }

  .chat-widget__action {
    width: 100%;
    padding: 0.45rem 0.55rem;
    font-size: 0.78rem;
  }
}

@keyframes chat-widget-typing {
  0%,
  80%,
  100% {
    transform: translateY(0);
    opacity: 0.35;
  }
  40% {
    transform: translateY(-0.18rem);
    opacity: 1;
  }
}