.float-ui { position: fixed; right: 16px; bottom: 20px; z-index: 50; display: flex; flex-direction: column; align-items: flex-end; gap: 10px; }
.float-btn { opacity: 0; visibility: hidden; transform: translateY(10px); transition: opacity .25s ease, transform .25s ease, visibility .25s; }
.float-btn.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.float-watch {
  display: inline-flex; align-items: center; gap: 7px;
  background: linear-gradient(135deg, #FF2E63, #A855F7); color: #fff; text-decoration: none;
  font-weight: 700; font-size: .92rem; line-height: 1;
  padding: 13px 18px; border-radius: 999px;
  box-shadow: 0 6px 18px rgba(217, 70, 239, .4);
}
.float-watch:hover { filter: brightness(1.08); }
.back-to-top {
  width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font-size: 20px; line-height: 1; cursor: pointer; padding: 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, .12);
  display: flex; align-items: center; justify-content: center;
}
.back-to-top:hover { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
@media (max-width: 767px) {
  .float-ui { right: 12px; bottom: 14px; }
  .float-watch { font-size: .88rem; padding: 12px 16px; }
  .back-to-top { width: 44px; height: 44px; }
}