:root {
  color-scheme: dark;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --ink: #edf8f4;
  --muted: #9fb7b3;
  --panel: #153b42;
  --panel-border: #6ea9aa;
  --accent: #8ee8d7;
  --accent-strong: #e1fff5;
  --metal: #aabfc0;
  --metal-dark: #526b6e;
  --water: #76c9e9;
  --plant: #8fd176;
  --soil: #735441;
  --warning: #f0c47b;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
  overscroll-behavior: none;
}

body {
  min-height: 100svh;
  color: var(--ink);
  background:
    radial-gradient(circle at 50% 0%, #376a70 0, transparent 42rem),
    #10262b;
}

button,
[role="button"] {
  -webkit-tap-highlight-color: transparent;
}

.prototype {
  width: min(100%, 52rem);
  min-height: 100svh;
  margin: 0 auto;
  padding: max(1rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) max(1rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.75rem;
}

.prototype__header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
}

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

.eyebrow,
.prototype-note,
.safety-note {
  margin: 0;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

h1 {
  margin: 0.15rem 0 0;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  line-height: 1.1;
}

.prototype-note,
.safety-note {
  color: var(--muted);
  font-size: 0.7rem;
}

.prototype-note {
  margin-top: 0.25rem;
}

.world-scene {
  position: relative;
  width: 100%;
  height: min(72svh, 42rem);
  min-height: 31rem;
  overflow: hidden;
  border: 1px solid var(--panel-border);
  border-radius: 1.25rem;
  background:
    linear-gradient(180deg, #4f8f94 0 57%, #365f50 57% 100%),
    var(--panel);
  box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.3);
  isolation: isolate;
  touch-action: none;
  user-select: none;
}

.sky-shape {
  position: absolute;
  border: 2px solid rgba(234, 255, 249, 0.2);
  border-radius: 50%;
}

.sky-shape--one {
  width: 16rem;
  height: 16rem;
  top: -8rem;
  left: -4rem;
}

.sky-shape--two {
  width: 9rem;
  height: 9rem;
  top: 5%;
  right: -4rem;
}

.ground {
  position: absolute;
  inset: 57% 0 0;
  background:
    repeating-linear-gradient(0deg, transparent 0 1.6rem, rgba(255, 255, 255, 0.025) 1.6rem 1.68rem),
    linear-gradient(90deg, #416f5d, #5b8060);
  border-top: 1px solid #8bb18b;
  z-index: -1;
}

.greenhouse {
  position: absolute;
  top: 8%;
  right: 6%;
  width: 45%;
  height: 38%;
}

.greenhouse__frame {
  position: absolute;
  inset: 12% 0 0;
  overflow: hidden;
  border: 3px solid #9bc8c1;
  border-top: 0;
  background:
    repeating-linear-gradient(90deg, rgba(236, 255, 250, 0.16) 0 2.5rem, rgba(230, 253, 245, 0.28) 2.5rem 2.65rem),
    linear-gradient(180deg, rgba(162, 222, 211, 0.3), rgba(40, 88, 69, 0.56));
  clip-path: polygon(50% 0, 100% 27%, 100% 100%, 0 100%, 0 27%);
}

.greenhouse__roof {
  position: absolute;
  top: 13%;
  left: 3%;
  width: 95%;
  height: 3px;
  background: #9bc8c1;
  transform: rotate(14.5deg);
  transform-origin: left center;
}

.greenhouse__roof::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 52%;
  height: 3px;
  background: #9bc8c1;
  transform: rotate(-29deg);
  transform-origin: right center;
}

.greenhouse__post {
  position: absolute;
  top: 24%;
  bottom: 0;
  width: 2px;
  background: rgba(189, 225, 219, 0.6);
}

.greenhouse__post--left { left: 2%; }
.greenhouse__post--center { left: 50%; }
.greenhouse__post--right { right: 2%; }

.greenhouse__floor {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 4px;
  background: #9dcb88;
}

.sprinkler {
  position: absolute;
  top: 31%;
  right: 10%;
  left: 10%;
  height: 22%;
  opacity: 0.55;
}

.sprinkler__bar {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 4px;
  border: 1px solid #758f91;
  border-radius: 99px;
  background: #466b6b;
}

.sprinkler__drop {
  position: absolute;
  top: 0.45rem;
  width: 0.45rem;
  height: 0.65rem;
  border: 2px solid var(--water);
  border-radius: 60% 40% 65% 35%;
  opacity: 0;
  transform: translateY(-0.35rem) rotate(45deg) scale(0.7);
}

.sprinkler__drop--one { left: 19%; }
.sprinkler__drop--two { left: 49%; }
.sprinkler__drop--three { left: 78%; }

.plant-row {
  position: absolute;
  right: 8%;
  bottom: 5%;
  left: 8%;
  height: 37%;
  display: flex;
  align-items: end;
  justify-content: space-around;
}

.plant {
  position: relative;
  width: 1.75rem;
  height: 2.2rem;
  border-bottom: 0.35rem solid var(--soil);
  transform: scaleY(0.52) rotate(7deg);
  transform-origin: center bottom;
  transition: transform 700ms cubic-bezier(0.2, 0.9, 0.25, 1.25);
}

.plant::before {
  content: "";
  position: absolute;
  bottom: 0.25rem;
  left: 50%;
  width: 0.17rem;
  height: 1.9rem;
  border-radius: 99px;
  background: #6fa35e;
  transform: translateX(-50%);
}

.plant i {
  position: absolute;
  left: 50%;
  width: 0.75rem;
  height: 0.44rem;
  border: 2px solid #a4db88;
  border-radius: 90% 15% 85% 15%;
  background: #4f904b;
  transform-origin: 0 50%;
}

.plant i:nth-child(1) { bottom: 0.7rem; transform: rotate(18deg); }
.plant i:nth-child(2) { bottom: 1.15rem; transform: rotate(160deg); }
.plant i:nth-child(3) { bottom: 1.62rem; transform: rotate(8deg); opacity: 0; transition: opacity 400ms 400ms; }

.water-route {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.water-route__pipe,
.water-route__flow {
  fill: none;
  vector-effect: non-scaling-stroke;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.water-route__pipe {
  stroke: #6e9292;
  stroke-width: 18;
}

.water-route__flow {
  stroke: var(--water);
  stroke-width: 8;
  stroke-dasharray: 16 20;
  stroke-dashoffset: 280;
  opacity: 0;
}

.pump {
  position: absolute;
  top: 50%;
  left: 7%;
  width: 35%;
  height: 28%;
}

.pump__body {
  position: absolute;
  inset: 0;
}

.pump__housing {
  position: absolute;
  top: 4%;
  left: 8%;
  width: 62%;
  aspect-ratio: 1;
  border: clamp(0.55rem, 1.8vw, 0.9rem) solid #688386;
  border-radius: 50%;
  background: rgba(19, 49, 52, 0.78);
  box-shadow: inset 0 0 0 3px #a5b9b8, 0 0.65rem 1.2rem rgba(0, 0, 0, 0.2);
}

.pump__housing::after {
  content: "";
  position: absolute;
  inset: 13%;
  border: 2px dashed rgba(191, 224, 218, 0.33);
  border-radius: 50%;
}

.pump__impeller {
  position: absolute;
  top: 23%;
  left: 27%;
  width: 30%;
  aspect-ratio: 1;
  border: 3px solid #9db6b7;
  border-radius: 50%;
}

.pump__impeller i {
  position: absolute;
  top: 45%;
  left: 50%;
  width: 48%;
  height: 10%;
  border-radius: 99px;
  background: var(--metal);
  transform-origin: 0 50%;
}

.pump__impeller i:nth-child(1) { transform: rotate(0deg); }
.pump__impeller i:nth-child(2) { transform: rotate(90deg); }
.pump__impeller i:nth-child(3) { transform: rotate(180deg); }
.pump__impeller i:nth-child(4) { transform: rotate(270deg); }

.pump__outlet {
  position: absolute;
  top: 11%;
  left: 61%;
  width: 34%;
  height: 18%;
  border: 4px solid #668184;
  border-left: 0;
  border-radius: 0 99px 99px 0;
  background: #305b60;
}

.pump__base {
  position: absolute;
  right: 6%;
  bottom: 0;
  left: 5%;
  height: 16%;
  border: 3px solid #6a8583;
  border-radius: 0.45rem;
  background: #3d6667;
}

.shaft-slot {
  position: absolute;
  top: 24%;
  left: 31%;
  width: 55%;
  height: 20%;
  border-radius: 99px;
  pointer-events: none;
}

.shaft-slot__ghost {
  position: absolute;
  inset: 0;
  border: 3px dashed var(--accent);
  border-radius: 99px;
  background: repeating-linear-gradient(135deg, rgba(225, 255, 245, 0.22) 0 0.35rem, transparent 0.35rem 0.7rem);
  box-shadow: inset 0 0 0 0.22rem rgba(13, 44, 46, 0.5), 0 0 0 0 rgba(153, 228, 212, 0.2);
  animation: slot-pulse 1.6s ease-out infinite;
}

.activity-zone {
  position: absolute;
  right: 3%;
  bottom: 3%;
  width: 46%;
  height: 26%;
}

.harvest-crates {
  position: absolute;
  right: 5%;
  bottom: 4%;
  width: 48%;
  height: 72%;
}

.crate,
.worker__carried-crate {
  border: 2px solid #d7b37a;
  border-radius: 0.2rem;
  background:
    repeating-linear-gradient(0deg, transparent 0 0.35rem, rgba(255, 241, 210, 0.42) 0.35rem 0.43rem),
    #876948;
  box-shadow: inset 0 0 0 2px rgba(47, 31, 20, 0.38);
}

.crate {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 48%;
  height: 27%;
  opacity: 0.35;
  transform: translateY(0.4rem) scale(0.92);
  transition: opacity 450ms, transform 500ms cubic-bezier(0.2, 0.85, 0.3, 1.2);
}

.crate--two { right: 48%; opacity: 0; }
.crate--three { right: 24%; bottom: 27%; opacity: 0; }

.worker {
  position: absolute;
  bottom: 8%;
  left: 8%;
  width: 3.5rem;
  height: 7.4rem;
  opacity: 0.76;
  transition: transform 1500ms ease-in-out, opacity 500ms;
}

.worker__head {
  position: absolute;
  top: 0;
  left: 50%;
  width: 1.45rem;
  height: 1.45rem;
  border: 2px solid #d5e5df;
  border-radius: 50%;
  background: #56716c;
  transform: translateX(-50%);
}

.worker__head::after {
  content: "";
  position: absolute;
  top: -0.2rem;
  left: -0.25rem;
  width: 1.8rem;
  height: 0.55rem;
  border: 2px solid #e5c97f;
  border-radius: 99px 99px 35% 35%;
  background: #a77d3a;
}

.worker__body {
  position: absolute;
  top: 1.5rem;
  left: 50%;
  width: 1.65rem;
  height: 2.9rem;
  border: 2px solid #bed5ce;
  border-radius: 0.5rem;
  background: #3f6863;
  transform: translateX(-50%);
}

.worker__arm,
.worker__leg {
  position: absolute;
  width: 0.45rem;
  border: 2px solid #bed5ce;
  border-radius: 99px;
  background: #3f6863;
  transform-origin: top center;
}

.worker__arm { top: 1.8rem; height: 2.45rem; }
.worker__arm--left { left: 0.6rem; transform: rotate(12deg); }
.worker__arm--right { right: 0.6rem; transform: rotate(-12deg); }
.worker__leg { top: 4.2rem; height: 2.75rem; }
.worker__leg--left { left: 1.05rem; transform: rotate(4deg); }
.worker__leg--right { right: 1.05rem; transform: rotate(-4deg); }

.worker__carried-crate {
  position: absolute;
  top: 3.15rem;
  left: 50%;
  width: 2.75rem;
  height: 1.35rem;
  opacity: 0;
  transform: translateX(-50%) scale(0.8);
  transition: opacity 400ms, transform 450ms;
}

.workbench {
  position: absolute;
  bottom: 3%;
  left: 5%;
  width: 36%;
  height: 16%;
}

.workbench__top {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 18%;
  border: 2px solid #9b815d;
  border-radius: 0.35rem;
  background: #5f4938;
}

.workbench__leg {
  position: absolute;
  top: 16%;
  bottom: 0;
  width: 6%;
  background: #49362d;
}

.workbench__leg--left { left: 10%; }
.workbench__leg--right { right: 10%; }

.shaft-part {
  position: absolute;
  bottom: 12%;
  left: 9%;
  z-index: 8;
  width: 26%;
  height: clamp(2.65rem, 7vw, 3.4rem);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  outline: none;
  filter: drop-shadow(0 0.75rem 0.55rem rgba(0, 0, 0, 0.34));
  animation: shaft-invitation 2.2s ease-in-out infinite;
  transition: left 220ms ease-out, top 220ms ease-out, filter 180ms, transform 180ms;
}

.shaft-part::after {
  content: "";
  position: absolute;
  inset: -0.65rem;
  border: 2px solid rgba(225, 255, 245, 0.3);
  border-radius: 99px;
  transition: border-color 160ms, box-shadow 160ms;
}

.shaft-part:focus-visible::after,
.shaft-part.is-dragging::after {
  border-color: var(--accent);
  box-shadow: 0 0 0 0.35rem rgba(153, 228, 212, 0.13);
}

.shaft-part::before {
  content: "";
  position: absolute;
  inset: -0.9rem;
  z-index: -1;
  border-radius: 99px;
  background: radial-gradient(ellipse, rgba(181, 255, 239, 0.38), transparent 67%);
  opacity: 0.7;
}

.shaft-part.is-dragging {
  cursor: grabbing;
  filter: drop-shadow(0 1rem 0.7rem rgba(0, 0, 0, 0.42));
  transform: translateY(-0.35rem) scale(1.03);
  transition: filter 120ms, transform 120ms;
  animation: none;
}

.world-scene.is-guiding .shaft-slot__ghost,
.world-scene.is-near-slot .shaft-slot__ghost {
  border-color: #effff9;
  background-color: rgba(141, 239, 218, 0.27);
  box-shadow: inset 0 0 0 0.22rem rgba(13, 44, 46, 0.45), 0 0 1.15rem rgba(168, 255, 235, 0.78);
}

.world-scene.is-near-slot .shaft-slot__ghost {
  transform: scale(1.08);
}

.world-scene.is-guiding .shaft-part::before {
  opacity: 1;
}

.shaft-part__body {
  position: absolute;
  right: 9%;
  left: 9%;
  height: 45%;
  overflow: hidden;
  border: 2px solid #d6e2e1;
  border-radius: 99px;
  background:
    repeating-linear-gradient(125deg, transparent 0 0.42rem, rgba(10, 33, 36, 0.42) 0.42rem 0.61rem),
    linear-gradient(180deg, #e0eded, #82999a 48%, #d1dfdf 55%, #687f82);
  box-shadow: inset 0 0.2rem 0.2rem rgba(255, 255, 255, 0.35);
}

.shaft-part__end {
  position: absolute;
  width: 13%;
  height: 66%;
  border: 2px solid #d5e2e1;
  border-radius: 0.35rem;
  background: linear-gradient(180deg, #c4d6d5, #667d7f 50%, #b9cdcc);
}

.shaft-part__end::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 62%;
  height: 2px;
  background: #40595c;
  box-shadow: 0 -0.25rem 0 #40595c, 0 0.25rem 0 #40595c;
  transform: translate(-50%, -50%);
}

.shaft-part__end--left { left: 1%; }
.shaft-part__end--right { right: 1%; }

.causal-trace {
  position: absolute;
  inset: 0;
  z-index: 7;
  pointer-events: none;
}

.causal-trace__node {
  position: absolute;
  width: 1rem;
  height: 1rem;
  border: 3px solid var(--accent-strong);
  border-radius: 50%;
  opacity: 0;
  transform: scale(0.45);
}

.causal-trace__node--shaft { top: 60%; left: 22%; }
.causal-trace__node--pump { top: 54%; left: 30%; }
.causal-trace__node--water { top: 37%; left: 57%; }
.causal-trace__node--plant { top: 31%; left: 78%; }
.causal-trace__node--activity { top: 77%; left: 78%; }

.safety-note {
  text-align: center;
}

.world-scene.is-installed .shaft-slot__ghost {
  opacity: 0;
  animation: none;
}

.world-scene.is-installed .shaft-part {
  width: 19.5%;
  min-width: 0;
  cursor: default;
  filter: drop-shadow(0 0 0.65rem rgba(153, 228, 212, 0.28));
  animation: none;
}

.world-scene.is-installed .shaft-part__body {
  animation: shaft-surface 450ms linear infinite;
}

.world-scene.is-installed .shaft-part__end::after,
.world-scene.is-installed .pump__impeller {
  animation: mechanical-spin 900ms linear infinite;
}

.world-scene.is-pumping .pump__housing {
  box-shadow: inset 0 0 0 3px #c2ddd9, 0 0 1.15rem rgba(153, 228, 212, 0.25);
}

.world-scene.is-water-flowing {
  background:
    linear-gradient(180deg, #67a9ad 0 57%, #4d835f 57% 100%),
    var(--panel);
}

.world-scene.is-growing .greenhouse__frame {
  background:
    repeating-linear-gradient(90deg, rgba(241, 255, 246, 0.25) 0 2.5rem, rgba(232, 255, 240, 0.38) 2.5rem 2.65rem),
    linear-gradient(180deg, rgba(166, 228, 176, 0.45), rgba(54, 124, 72, 0.62));
}

.world-scene.is-water-flowing .water-route__flow {
  opacity: 1;
  animation: water-travel 1650ms linear infinite;
}

.world-scene.is-water-arrived .sprinkler {
  opacity: 1;
}

.world-scene.is-water-arrived .sprinkler__drop {
  animation: falling-water 950ms ease-in infinite;
}

.world-scene.is-water-arrived .sprinkler__drop--two { animation-delay: 220ms; }
.world-scene.is-water-arrived .sprinkler__drop--three { animation-delay: 470ms; }

.world-scene.is-growing .plant {
  transform: scaleY(1) rotate(0);
}

.world-scene.is-growing .plant i:nth-child(3) {
  opacity: 1;
}

.world-scene.is-growing .plant--two { transition-delay: 130ms; }
.world-scene.is-growing .plant--three { transition-delay: 260ms; }
.world-scene.is-growing .plant--four { transition-delay: 390ms; }

.world-scene.is-harvest .crate {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.world-scene.is-harvest .crate--two { transition-delay: 250ms; }
.world-scene.is-harvest .crate--three { transition-delay: 500ms; }

.world-scene.is-working .worker {
  opacity: 1;
  transform: translateX(3.2rem);
}

.world-scene.is-working .worker__arm--left { animation: worker-arm-left 700ms ease-in-out 2; }
.world-scene.is-working .worker__arm--right { animation: worker-arm-right 700ms ease-in-out 2; }
.world-scene.is-working .worker__leg--left { animation: worker-leg-left 700ms ease-in-out 2; }
.world-scene.is-working .worker__leg--right { animation: worker-leg-right 700ms ease-in-out 2; }
.world-scene.is-working .worker__carried-crate { opacity: 1; transform: translateX(-50%) scale(1); }

.replay-button {
  align-self: center;
  min-height: 2.75rem;
  padding: 0.55rem 1.15rem;
  border: 2px solid #bff4e4;
  border-radius: 99px;
  color: #092124;
  background: #bff4e4;
  box-shadow: 0 0.55rem 1.1rem rgba(0, 0, 0, 0.2);
  font: inherit;
  font-weight: 800;
}

.replay-button:focus-visible {
  outline: 3px solid #fff7ce;
  outline-offset: 3px;
}

.world-scene.is-complete .causal-trace__node {
  animation: trace-node 550ms ease-out 1;
}

.world-scene.is-complete .causal-trace__node--pump { animation-delay: 380ms; }
.world-scene.is-complete .causal-trace__node--water { animation-delay: 760ms; }
.world-scene.is-complete .causal-trace__node--plant { animation-delay: 1140ms; }
.world-scene.is-complete .causal-trace__node--activity { animation-delay: 1520ms; }

@keyframes slot-pulse {
  0% { box-shadow: 0 0 0 0 rgba(153, 228, 212, 0.28); }
  65% { box-shadow: 0 0 0 0.65rem rgba(153, 228, 212, 0); }
  100% { box-shadow: 0 0 0 0 rgba(153, 228, 212, 0); }
}

@keyframes shaft-invitation {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-0.32rem); }
}

@keyframes shaft-surface {
  to { background-position: 0.61rem 0, 0 0; }
}

@keyframes mechanical-spin {
  to { transform: rotate(360deg); }
}

@keyframes water-travel {
  to { stroke-dashoffset: 0; }
}

@keyframes falling-water {
  0% { opacity: 0; transform: translateY(-0.35rem) rotate(45deg) scale(0.7); }
  25% { opacity: 1; }
  100% { opacity: 0; transform: translateY(2.1rem) rotate(45deg) scale(1); }
}

@keyframes worker-arm-left {
  50% { transform: rotate(-14deg); }
}

@keyframes worker-arm-right {
  50% { transform: rotate(14deg); }
}

@keyframes worker-leg-left {
  50% { transform: rotate(-13deg); }
}

@keyframes worker-leg-right {
  50% { transform: rotate(13deg); }
}

@keyframes trace-node {
  0% { opacity: 0; transform: scale(0.45); }
  45% { opacity: 1; transform: scale(1.35); }
  100% { opacity: 0; transform: scale(1.8); }
}

@media (max-width: 40rem) {
  .prototype {
    justify-content: flex-start;
    gap: 0.6rem;
    padding-inline: max(0.65rem, env(safe-area-inset-left));
  }

  .world-scene {
    height: min(78svh, 41rem);
    min-height: 30rem;
    border-radius: 1rem;
  }

  .greenhouse {
    right: 4%;
    width: 49%;
  }

  .pump {
    left: 4%;
    width: 39%;
  }

  .activity-zone {
    width: 49%;
  }

  .worker {
    transform: scale(0.86);
    transform-origin: bottom center;
  }

  .world-scene.is-working .worker {
    transform: translateX(2.35rem) scale(0.86);
  }

  .shaft-part {
    left: 7%;
    width: 30%;
    min-width: 7rem;
  }
}

@media (max-height: 41rem) and (orientation: landscape) {
  .prototype {
    width: min(100%, 64rem);
    display: grid;
    grid-template-columns: 13rem 1fr;
    grid-template-rows: 1fr auto;
    align-items: center;
  }

  .prototype__header {
    align-self: start;
    display: block;
  }

  .world-scene {
    height: calc(100svh - 2rem);
    min-height: 21rem;
  }

  .safety-note {
    grid-column: 1;
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  .shaft-slot__ghost {
    animation-duration: 2.8s;
  }

  .shaft-part {
    animation-duration: 3.4s;
  }

  .world-scene.is-installed .shaft-part__body,
  .world-scene.is-installed .shaft-part__end::after,
  .world-scene.is-installed .pump__impeller,
  .world-scene.is-water-flowing .water-route__flow,
  .world-scene.is-water-arrived .sprinkler__drop {
    animation-duration: 1.8s;
  }
}