@charset "utf-8";
/* theme-switch.css · 主题开关和主题切换过渡 */

.theme-switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 3em;
  height: 1.6em;
  flex: 0 0 auto;
  padding-inline: 0.32em;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elevated);
  font-size: 1rem;
  cursor: pointer;
  transition:
    background-color 0.3s var(--ease),
    border-color 0.3s var(--ease);
}

.theme-switch:hover,
.theme-switch:focus-visible {
  border-color: var(--accent);
}

.theme-switch__icon {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 1.15em;
  height: 1.15em;
  color: var(--fg-3);
  transition: color 0.3s var(--ease);
}

.theme-switch__icon .icon {
  width: 0.78em;
  height: 0.78em;
}

.theme-switch__icon--sun {
  color: var(--accent);
}

.theme-switch__icon--sun .icon {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
}

:root[data-theme="dark"] .theme-switch__icon--sun {
  color: var(--fg-3);
}

:root[data-theme="dark"] .theme-switch__icon--moon {
  color: var(--accent);
}

.theme-switch__knob {
  position: absolute;
  z-index: 0;
  inset-block-start: 50%;
  inset-inline-start: 0.32em;
  width: 1.2em;
  height: 1.2em;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--bg);
  transform: translateY(-50%);
  transition:
    translate 0.3s var(--ease),
    background-color 0.3s var(--ease),
    border-color 0.3s var(--ease);
}

:root[data-theme="dark"] .theme-switch__knob {
  translate: 1.16em 0;
}

.theme-transition,
.theme-transition *,
.theme-transition *::before,
.theme-transition *::after {
  transition:
    background-color 0.35s var(--ease),
    color 0.35s var(--ease),
    border-color 0.35s var(--ease),
    fill 0.35s var(--ease),
    stroke 0.35s var(--ease),
    box-shadow 0.35s var(--ease) !important;
}

.theme-transition .theme-switch__knob {
  transition:
    translate 0.3s var(--ease),
    background-color 0.35s var(--ease),
    border-color 0.35s var(--ease) !important;
}

@media (max-width: 768px) {
  .theme-switch {
    align-self: flex-start;
    margin-block: var(--s-3);
    font-size: 1.3rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .theme-transition,
  .theme-transition *,
  .theme-transition *::before,
  .theme-transition *::after {
    transition: none !important;
  }

  .theme-switch,
  .theme-switch__knob,
  .theme-switch__icon {
    transition: none !important;
  }
}