:root {
  color-scheme: light;
  --sky: #DDEDFB;
  --ink: #4E3022;
  --ink-soft: #704A35;
  --card: rgba(255, 255, 255, 0.66);
  --card-border: rgba(255, 255, 255, 0.9);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  min-height: 100%;
  background: var(--sky);
}

body {
  min-width: 320px;
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  overflow-x: hidden;
  background: var(--sky);
  color: var(--ink);
  font-family: "Trebuchet MS", "Noto Sans TC", sans-serif;
}

button,
img {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

.game-shell {
  position: relative;
  display: grid;
  min-height: 100vh;
  min-height: 100svh;
  place-items: center;
  padding: clamp(4.75rem, 10vw, 6.5rem) 1rem 2rem;
}

.counter {
  position: fixed;
  top: clamp(1rem, 3vw, 2rem);
  right: clamp(1rem, 4vw, 3rem);
  z-index: 10;
  display: flex;
  align-items: center;
  gap: clamp(0.35rem, 1vw, 0.65rem);
  padding: 0.55rem 0.7rem;
  border: 2px solid var(--card-border);
  border-radius: 1.2rem;
  background: var(--card);
  box-shadow: 0 0.65rem 1.5rem rgba(67, 113, 145, 0.12);
  backdrop-filter: blur(0.65rem);
}

.counter-digits {
  display: flex;
  align-items: center;
  gap: 0;
  min-height: clamp(2.2rem, 7vw, 3.5rem);
}

.counter-digit-slot {
  display: block;
  flex: 0 0 auto;
  position: relative;
  width: clamp(2rem, 7vw, 3.5rem);
  height: clamp(2.3rem, 7.8vw, 3.9rem);
  overflow: visible;
}

.counter-digit {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 0.2rem 0 rgba(89, 51, 31, 0.13));
}

.counter-digit-slot + .counter-digit-slot {
  margin-left: -0.15rem;
}

.counter-digit-slot.is-updating .counter-digit-current {
  animation: counter-digit-out 560ms ease-in var(--digit-delay, 0ms) both;
}

.counter-digit-slot.is-updating .counter-digit-next {
  animation: counter-digit-in 560ms ease-out var(--digit-delay, 0ms) both;
}

@keyframes counter-digit-out {
  from {
    opacity: 1;
    transform: translateY(0);
  }

  to {
    opacity: 0;
    transform: translateY(-25%);
  }
}

@keyframes counter-digit-in {
  from {
    opacity: 0;
    transform: translateY(25%);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.cry-bubble {
  position: absolute;
  top: 2%;
  right: -4%;
  z-index: 5;
  width: clamp(5rem, 28%, 10rem);
  aspect-ratio: 1;
  pointer-events: none;
  visibility: hidden;
  opacity: 0;
  transform: translateY(-0.5rem) scale(0.94);
  transition:
    opacity 320ms ease,
    transform 320ms ease,
    visibility 0s linear 320ms;
}

.cry-bubble.is-visible {
  visibility: visible;
  opacity: 1;
  transform: translateY(0) scale(1);
  transition-delay: 0s;
}

.cry-bubble-image,
.cry-bubble-grass {
  position: absolute;
  display: block;
  pointer-events: none;
  user-select: none;
}

.cry-bubble-image {
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.cry-bubble-grass {
  top: 35%;
  left: 56%;
  width: 72%;
  height: 72%;
  object-fit: contain;
  transform: translate(-50%, -50%) rotate(45deg);
}

.scene {
  display: flex;
  width: min(100%, 39rem);
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.capybara-button {
  display: block;
  width: min(78vw, 31rem);
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 140ms ease;
}

.capybara-button:active,
.capybara-button.is-pressed {
  transform: scale(0.985);
}

.capybara-button:focus-visible {
  outline: none;
}

.capybara-stage {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 1;
}

.capybara-image {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  user-select: none;
}

.capybara-eyes {
  z-index: 2;
  transform: translate3d(var(--eye-x, 0%), var(--eye-y, 0%), 0);
  transition: transform 180ms ease, opacity 260ms ease;
}

.capybara-cry-eyes {
  z-index: 2;
  opacity: 0;
  transform: none;
  transition: opacity 260ms ease;
}

.capybara-eyes.is-hidden {
  opacity: 0;
}

.capybara-cry-eyes.is-visible {
  opacity: 1;
}

.grass-visual {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: block;
  width: 100%;
  height: 100%;
  visibility: hidden;
  pointer-events: none;
}

.grass-visual.is-visible {
  visibility: visible;
}

.particle-layer {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  opacity: 0;
}

.particle-layer.is-active {
  opacity: 1;
}

.particle {
  position: absolute;
  top: var(--particle-origin-y, 38%);
  left: var(--particle-origin-x, 50%);
  display: block;
  width: clamp(0.34rem, 1.4vw, 0.62rem);
  height: clamp(0.34rem, 1.4vw, 0.62rem);
  border-radius: 0;
  background: #99C95B;
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.1);
  animation: particle-fall var(--particle-duration, 1.3s) cubic-bezier(0.35, 0.05, 0.65, 1) var(--particle-delay, 0s) infinite;
  animation-play-state: paused;
  will-change: transform, opacity;
}

.particle:nth-child(3n) {
  width: clamp(0.22rem, 1vw, 0.45rem);
  height: clamp(0.48rem, 1.8vw, 0.8rem);
  border-radius: 0;
  background: #B5D96E;
  transform-origin: 50% 100%;
}

.particle:nth-child(3n + 1) {
  background: #78B84C;
}

.particle-layer.is-active .particle {
  animation-play-state: running;
}

@keyframes particle-fall {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.45) rotate(-15deg);
  }

  12% {
    opacity: 0.95;
    transform: translate(-50%, -50%) scale(0.9) rotate(12deg);
  }

  100% {
    opacity: 0;
    transform: translate(calc(-50% + var(--particle-x)), calc(-50% + var(--particle-y))) scale(0.2) rotate(var(--particle-rotation));
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 540px) {
  .game-shell {
    padding-top: 6.5rem;
  }

  .counter {
    top: 6rem;
    right: auto;
    left: 50%;
    width: auto;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
    transform: translateX(-50%);
  }

  .counter-digit-slot {
    width: clamp(2.5rem, 14vw, 4.2rem);
    height: clamp(2.8rem, 15.5vw, 4.6rem);
  }

  .counter-digit-slot + .counter-digit-slot {
    margin-left: -0.22rem;
  }

  .cry-bubble {
    top: 2%;
    right: -4%;
    width: clamp(4.5rem, 28%, 7.5rem);
  }

  .scene {
    gap: 0.8rem;
    transform: translateY(4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .capybara-button,
  .capybara-eyes,
  .capybara-cry-eyes,
  .cry-bubble,
  .grass-visual {
    transition: none;
  }

  .particle {
    animation: none;
    opacity: 0;
  }
}