.dc-theme-toggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid rgba(182,255,60,0.35);
  background: #0b1f3a;
  color: #b6ff3c;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  box-shadow: 0 6px 20px rgba(0,0,0,0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.dc-theme-toggle:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 0 22px -2px rgba(182,255,60,0.5);
}
.dc-theme-toggle:active {
  transform: scale(0.96);
}
.dc-icon {
  width: 22px;
  height: 22px;
  transition: opacity 0.2s ease, transform 0.3s ease;
}
/* по умолчанию (тёмная тема) — показываем луну */
.dc-icon-sun { display: none; }
.dc-icon-moon { display: block; }
/* светлая тема — солнце + светлая кнопка */
html.dc-light .dc-icon-moon { display: none; }
html.dc-light .dc-icon-sun { display: block; }
html.dc-light .dc-theme-toggle {
  background: #ffffff;
  color: #4d7c1f;
  border-color: rgba(77,124,31,0.35);
}