/* Motion only enhances the existing layout; no JS dependency for visibility. */
.reading-progress { position: fixed; inset: 0 0 auto; height: 3px; z-index: 30; background: linear-gradient(90deg, #2a66f2, #16c5f0 60%, #ffae44); transform: scaleX(0); transform-origin: left; pointer-events: none; }
.motion-ready body, .motion-ready .about, .motion-ready .ribbon, .motion-ready .theme-switch, .motion-ready .tags span { transition: background-color .35s ease, color .25s ease, border-color .35s ease; }
.motion-ready .theme-switch button { transition: background-color .25s ease, color .25s ease, box-shadow .25s ease; }
.motion-ready .theme-switch svg { transition: transform .5s cubic-bezier(.22,1,.36,1); }
.motion-ready .theme-switch button[aria-pressed="true"] svg { transform: rotate(12deg); }
.motion-ready nav a { position: relative; }
.motion-ready nav a::after { content: ''; position: absolute; left: 0; right: 0; bottom: 7px; height: 2px; border-radius: 2px; background: var(--blue); transform: scaleX(0); transform-origin: left; transition: transform .3s cubic-bezier(.22,1,.36,1); }
.motion-ready nav a:focus-visible::after { transform: scaleX(1); }
.motion-ready .button, .motion-ready .back-top { transition: transform .25s cubic-bezier(.22,1,.36,1), background-color .3s, box-shadow .25s; }
.motion-ready .button span, .motion-ready .game-details b { display: inline-block; transition: transform .3s cubic-bezier(.22,1,.36,1); }
.motion-ready .button:active { transform: translateY(2px) scale(.98); box-shadow: 0 1px 0 var(--button-shadow); }
.motion-ready .theme-switch button:active, .motion-ready .motion-toggle:active { transform: scale(.95); }
.motion-ready .back-top:active { transform: translateY(-2px) scale(.95); }
.motion-ready .brand-icon { transition: transform .4s cubic-bezier(.22,1,.36,1); }
.motion-ready .motto-line .blue { position: relative; }
.motion-ready .motto-line .blue::after { content: ''; position: absolute; left: 1px; right: 0; bottom: -.08em; height: 3px; border-radius: 3px; background: var(--orange); opacity: .5; transform-origin: left; animation: ink-line 1s .5s cubic-bezier(.22,1,.36,1) backwards; }
@keyframes ink-line { from { transform: scaleX(0); opacity: 0; } to { transform: scaleX(1); opacity: .5; } }
.hero-art { position: relative; isolation: isolate; }
[data-tilt] { transform: perspective(1000px) rotateX(var(--tilt-x,0deg)) rotateY(var(--tilt-y,0deg)); transition: transform .4s cubic-bezier(.22,1,.36,1), box-shadow .4s ease; }
.cosmic-lights { position: absolute; inset: 0 0 40px; overflow: hidden; pointer-events: none; }
.cosmic-lights > span:not(.light-sweep) { position: absolute; color: #d6f8ff; font-size: 18px; opacity: 0; }
.cosmic-lights > span:nth-child(1) { left: 14%; top: 23%; }
.cosmic-lights > span:nth-child(2) { right: 14%; top: 14%; font-size: 24px; }
.cosmic-lights > span:nth-child(3) { right: 8%; top: 68%; font-size: 13px; }
.motion-ready .cosmic-lights > span:not(.light-sweep) { animation: starlight 5s ease-in-out infinite; }
.motion-ready .cosmic-lights > span:nth-child(2) { animation-delay: -1.8s; }
.motion-ready .cosmic-lights > span:nth-child(3) { animation-delay: -3.2s; }
.light-sweep { position: absolute; inset: -40% -80%; pointer-events: none; background: linear-gradient(115deg,transparent 40%,#ffffff00 45%,#b2f3ff22 50%,#ffffff00 55%,transparent 60%); opacity: 0; }
.motion-ready .light-sweep { animation: cosmic-sweep 9s ease-in-out infinite; }
.motion-ready .spark { animation: orbit-turn 24s linear infinite; }
.motion-ready .about-art img[data-loop] { animation: mascot-float 6s ease-in-out infinite; }
@keyframes starlight { 0%,100% { opacity: .12; transform: scale(.7) rotate(0); } 50% { opacity: .85; transform: scale(1.15) rotate(25deg); } }
@keyframes cosmic-sweep { 0%,20% { transform: translate3d(-32%,0,0); opacity: 0; } 35% { opacity: .7; } 65% { opacity: .7; } 80%,100% { transform: translate3d(32%,0,0); opacity: 0; } }
@keyframes orbit-turn { to { transform: rotate(360deg); } }
@keyframes mascot-float { 0%,100% { transform: translate3d(0,0,0); } 50% { transform: translate3d(0,-5px,0); } }
.ribbon { position: relative; padding: 0; }
.ribbon > .ribbon-window { display: block; overflow: hidden; padding-block: 16px; }
.ribbon .ribbon-track { display: flex; align-items: center; width: max-content; }
.ribbon .ribbon-group { display: flex; flex-shrink: 0; justify-content: space-around; align-items: center; gap: 32px; min-width: 100vw; padding-inline: 16px; }
.motion-ready .ribbon-track { animation: ribbon-flow 36s linear infinite; }
@keyframes ribbon-flow { to { transform: translate3d(-50%,0,0); } }
.motion-toggle { position: absolute; right: var(--gutter); top: 50%; transform: translateY(-50%); display: flex; align-items: center; justify-content: center; gap: 6px; padding: 0 13px; min-height: 44px; border: 1px solid var(--line); border-radius: 24px; background: var(--paper); color: var(--ink); box-shadow: 0 0 0 6px var(--surface); z-index: 1; }
.ribbon .motion-toggle > span { font-size: 11px; font-weight: 700; color: var(--ink); }
.motion-toggle .play-icon { display: none; }
.motion-toggle[aria-pressed="true"] .play-icon { display: block; }
.motion-toggle[aria-pressed="true"] .pause-icon { display: none; }
.motion-ready .motion-toggle:active { transform: translateY(-50%) scale(.95); }
.motion-ready [data-loop], .motion-ready [data-loop] * { animation-play-state: paused; }
.motion-ready [data-loop][data-inview="true"], .motion-ready [data-loop][data-inview="true"] * { animation-play-state: running; }
@media (hover:hover) and (pointer:fine) {
  .motion-ready nav a:hover::after { transform: scaleX(1); }
  .motion-ready .brand:hover .brand-icon { transform: rotate(-7deg) translateY(-2px); }
  .motion-ready .button:hover span { transform: translate(3px,-3px); }
  .motion-ready .back-top:hover { transform: translateY(-4px); }
  .motion-ready .game-details > div:hover b { transform: translate(3px,-3px); color: var(--blue); }
  [data-tilt].is-pointed { box-shadow: 0 18px 45px -25px #225fdf55; }
  .ribbon:hover .ribbon-track { animation-play-state: paused; }
}
@media (max-width:600px) {
  .ribbon > .ribbon-window { padding-block: 13px; }
  .ribbon .ribbon-group { gap: 22px; }
  .ribbon .motion-toggle { right: 12px; padding-inline: 10px; }
  .ribbon .motion-toggle > span { display: none; }
  .motion-toggle { min-width: 44px; }
  .cosmic-lights { bottom: 36px; }
  .cosmic-lights > span:nth-child(2) { font-size: 17px; }
  .motion-ready .ribbon-track { animation-duration: 42s; }
  .motion-ready nav a::after { left: 25%; right: 25%; }
  [data-tilt] { transform: none; }
}
/* The switch and OS accessibility setting stop all decorative movement. */
:root[data-motion="paused"] *, :root[data-motion="paused"] *::before, :root[data-motion="paused"] *::after,
:root[data-tab-visible="false"] *, :root[data-tab-visible="false"] *::before, :root[data-tab-visible="false"] *::after { animation-play-state: paused !important; }
:root[data-motion="paused"] { scroll-behavior: auto; }
:root[data-motion="paused"] *, :root[data-motion="paused"] *::before, :root[data-motion="paused"] *::after { transition: none !important; }
:root[data-motion="paused"] [data-tilt], :root[data-motion="paused"] .about-art img { transform: none !important; }
:root[data-motion="paused"] .motto-line .blue::after { animation: none; }
@media (prefers-reduced-motion:reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  [data-tilt] { transform: none !important; }
  .cosmic-lights { display: none; }
}