/* Chat widget — see design-specs/shared-layout.md for full spec */

.chat-widget {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 148px;
  height: 179px;
  z-index: 1000;
}

.chat-widget .bubble {
  position: absolute;
  width: 60px;
  height: 60px;
  border-radius: 150px;
  background: var(--color-grey-50);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 15px;
  border: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  transition: left 0.25s ease, top 0.25s ease, opacity 0.2s ease;
}
.chat-widget .bubble img { width: 36px; height: 36px; }

.chat-widget .bubble--phone { left: 72px; top: 2.5px; }
.chat-widget .bubble--zalo { left: 3px; top: 40.5px; }
.chat-widget .bubble--messenger { left: 12px; top: 114.5px; }

.chat-widget .toggle {
  position: absolute;
  width: 60px;
  height: 60px;
  border-radius: 150px;
  background: var(--color-grey-100);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6.667px;
  left: 72px;
  top: 74.5px;
  transition: left 0.25s ease, top 0.25s ease;
}
.chat-widget .toggle img { width: 46.667px; height: 46.667px; }

/* Collapsed (closed) state */
.chat-widget.is-collapsed { width: 69px; height: 65px; }
.chat-widget.is-collapsed .toggle {
  left: 4px;
  top: 2.5px;
  border: 1.667px solid var(--color-grey-300);
}
.chat-widget.is-collapsed .bubble--phone,
.chat-widget.is-collapsed .bubble--zalo,
.chat-widget.is-collapsed .bubble--messenger {
  left: 4px;
  top: 2.5px;
  opacity: 0;
  pointer-events: none;
}

/* Back-to-top — see Figma node 1214:38730 ("Chat box desktop" sibling) */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 210px;
  width: 64px;
  height: 64px;
  border-radius: 76.8px;
  background: var(--color-grey-50);
  border: 1.067px solid var(--color-grey-300);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-grey-700);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.2s ease;
}
.back-to-top.is-visible { opacity: 1; }

@media (max-width: 767.98px) {
  .back-to-top { right: 16px; bottom: 96px; width: 48px; height: 48px; }
}