/* ==========================================================================
   Algo Tools — Theme toggle control
   Visual styling for the light/dark switch used across every tool.
   ========================================================================== */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-full);
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  color: var(--c-text-muted);
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.theme-toggle:hover { color: var(--c-text); transform: translateY(-1px); }
.theme-toggle:active { transform: translateY(0); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }