:root {
  --bg-color: #f8f8f8;
  --text-color: #000;
  --link-color: #0077cc;
  --desc-color: #444;
  --toggle-bg: #ccc;
  --toggle-slider: #fff;
  --expo-in: cubic-bezier(0.87, 0, 0.13, 1);
}

.dark {
  --bg-color: #1a1a1a;
  --text-color: #e0e0e0;
  --link-color: #66b3ff;
  --desc-color: #aaa;
  --toggle-bg: #4a4a4a;
  --toggle-slider: #2196F3;
}

body {
  font-family: monospace;
  background: var(--bg-color);
  color: var(--text-color);
  padding: 2rem;
  transition: background-color 0.3s, color 0.3s;
  position: relative;
}

.entry {
  margin: 0.5rem 0;
}

a {
  text-decoration: none;
  color: var(--link-color);
}

a:hover {
  text-decoration: underline;
}

.desc {
  color: var(--desc-color);
}

/* Theme Toggle Switch */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 10px;
}

.toggle-label {
  font-family: monospace;
  font-size: 14px;
  color: var(--text-color);
  user-select: none;
}

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--toggle-bg);
  transition: .4s;
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: var(--toggle-slider);
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider:before {
  transform: translateX(26px);
}

/* View Transition Animation */
::view-transition-group(root) {
  animation-timing-function: var(--expo-in);
}

::view-transition-new(root) {
  mask: url('https://media.tenor.com/cyORI7kwShQAAAAi/shigure-ui-dance.gif') center / 0 no-repeat;
  animation: scale 2s;
  animation-fill-mode: both;
}

::view-transition-old(root),
.dark::view-transition-old(root) {
  animation: scale 3s;
  animation-fill-mode: both;
}

@keyframes scale {
  0% {
    mask-size: 0;
  }
  10% {
    mask-size: 50vmax;
  }
  90% {
    mask-size: 50vmax;
  }
  100% {
    mask-size: 2000vmax;
  }
}