/* ==========================================================================
   DMW-Performance — Dark Mode Toggle
   ==========================================================================
   Round 40px icon button. Sun (dark mode active) / Moon (light mode active).
   Visibility logic mirrors variables.css: respects manual override and
   prefers-color-scheme fallback.
   ========================================================================== */

.dark-mode-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  border: 1.5px solid var(--color-border);
  color: var(--color-text);
  cursor: pointer;
  padding: 0;
  font-size: 1rem;
  line-height: 1;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast);
  position: relative;
}

.dark-mode-toggle:hover {
  background-color: var(--color-bg-subtle);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.dark-mode-toggle:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

.dark-mode-toggle:active {
  transform: scale(0.95);
}

/* ----- Icon visibility ----- */
.dark-mode-toggle .fa-sun,
.dark-mode-toggle .fa-moon {
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

/* Default (light mode): show moon, hide sun */
.dark-mode-toggle .fa-sun {
  display: none;
}

.dark-mode-toggle .fa-moon {
  display: inline-block;
}

/* Manual dark mode: show sun, hide moon */
[data-theme="dark"] .dark-mode-toggle .fa-sun {
  display: inline-block;
}

[data-theme="dark"] .dark-mode-toggle .fa-moon {
  display: none;
}

/* Manual light mode: show moon (overrides OS dark) */
[data-theme="light"] .dark-mode-toggle .fa-sun {
  display: none;
}

[data-theme="light"] .dark-mode-toggle .fa-moon {
  display: inline-block;
}

/* Auto dark mode (OS preference, no manual override) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .dark-mode-toggle .fa-sun {
    display: inline-block;
  }
  :root:not([data-theme="light"]) .dark-mode-toggle .fa-moon {
    display: none;
  }
}