:root {
  --sky: #5ebbd8;
  --sky-soft: #9fdcf0;
  --river: #3aa7c9;
  --river-deep: #2b8db0;
  --foam: rgba(255, 255, 255, 0.55);
  --ink: #1f3a2e;
  --ink-soft: #3d5c4a;
  --paper: #fff9ee;
  --edge: #ffe4a8;
  --xanh: #3b8fe0;
  --xanh-deep: #1f6fbe;
  --do: #e24b4b;
  --do-deep: #c63a3a;
  --sen: #ff6b8a;
  --sen-deep: #e0486a;
  --co: #3ecfbe;
  --co-deep: #1fa7a0;
  --coral: #ff7a59;
  --coral-deep: #e85a3a;
  --sun: #ffd45a;
  --font-display: "Fredoka", system-ui, sans-serif;
  --font-body: "Be Vietnam Pro", system-ui, sans-serif;
  --steps: 5;
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  min-height: 100dvh;
  background: linear-gradient(180deg, var(--sky) 0%, var(--sky-soft) 45%, #c8ecf8 100%);
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

button {
  font-family: inherit;
  border: none;
  cursor: pointer;
}

a {
  text-decoration: none;
  color: inherit;
}

.bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.sun {
  position: absolute;
  top: 5%;
  right: 8%;
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #fff7c8, var(--sun));
  box-shadow: 0 0 36px rgba(255, 212, 90, 0.5);
}

.cloud {
  position: absolute;
  background: rgba(255, 255, 255, 0.85);
  border-radius: 999px;
  animation: drift 32s linear infinite;
}
.cloud::before,
.cloud::after {
  content: "";
  position: absolute;
  background: inherit;
  border-radius: 50%;
}
.c1 {
  width: 90px;
  height: 32px;
  top: 12%;
  left: -20%;
}
.c1::before {
  width: 40px;
  height: 40px;
  top: -18px;
  left: 14px;
}
.c1::after {
  width: 48px;
  height: 48px;
  top: -24px;
  left: 36px;
}
.c2 {
  width: 70px;
  height: 26px;
  top: 20%;
  left: -30%;
  animation-duration: 40s;
  opacity: 0.75;
}
.c2::before {
  width: 30px;
  height: 30px;
  top: -14px;
  left: 10px;
}
.c2::after {
  width: 38px;
  height: 38px;
  top: -18px;
  left: 28px;
}

@keyframes drift {
  to {
    transform: translateX(140vw);
  }
}

.app {
  position: relative;
  z-index: 1;
  width: min(560px, 100%);
  margin: 0 auto;
  min-height: 100dvh;
  padding: calc(14px + var(--safe-t)) 16px calc(20px + var(--safe-b));
  display: flex;
  flex-direction: column;
}

.app:has(#screen-play.active) {
  width: min(1280px, 100%);
  height: 100dvh;
  max-height: 100dvh;
}

.screen {
  display: none;
  flex-direction: column;
  gap: 14px;
  animation: fade 0.35s ease;
}
.screen.active {
  display: flex;
}
.screen[hidden] {
  display: none !important;
}

@keyframes fade {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.back-hub {
  align-self: flex-start;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.8);
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--co-deep);
  box-shadow: 0 4px 0 rgba(31, 58, 46, 0.1);
}

.eyebrow {
  margin: 0;
  text-align: center;
  font-weight: 800;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.title {
  margin: 0;
  text-align: center;
  font-family: var(--font-display);
  font-size: clamp(2rem, 8vw, 2.8rem);
  line-height: 1.1;
}
.title span {
  color: var(--river-deep);
}

.lead {
  margin: 0;
  text-align: center;
  font-weight: 700;
  color: var(--ink-soft);
}

.preview-boats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 8px 0;
}

.boat-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px 16px;
  border-radius: 20px;
  background: var(--paper);
  border: 3px solid var(--edge);
  min-width: 110px;
  box-shadow: 0 8px 0 rgba(31, 58, 46, 0.1);
}
.boat-chip.team-a {
  border-color: #8ec8f5;
}
.boat-chip.team-b {
  border-color: #f5a8a8;
}
.boat-preview {
  width: 148px;
  height: auto;
  display: block;
}
.vs {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--coral);
}

.host-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.host-sen {
  width: 96px;
  height: auto;
  flex: none;
  object-fit: contain;
}
.intro-bubble {
  margin: 0;
  flex: 1;
  background: var(--paper);
  border: 3px solid var(--edge);
  border-radius: 22px;
  padding: 14px 16px;
  text-align: center;
  font-weight: 600;
  line-height: 1.45;
  box-shadow: 0 8px 0 rgba(31, 58, 46, 0.1);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 12px 22px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
}
.btn-primary {
  background: linear-gradient(180deg, #ff9a78, var(--coral));
  color: #fff;
  box-shadow: 0 8px 0 var(--coral-deep);
}
.btn-primary:active {
  transform: translateY(3px);
  box-shadow: 0 4px 0 var(--coral-deep);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.75);
  color: var(--ink-soft);
  box-shadow: 0 6px 0 rgba(31, 58, 46, 0.1);
  text-align: center;
}
.btn-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--edge);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.voice-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  color: var(--ink-soft);
}
.voice-toggle input {
  width: 20px;
  height: 20px;
  accent-color: var(--co-deep);
}

/* Race */
#screen-play.active {
  flex: 1;
  min-height: 0;
  gap: 0;
}

.play-stage {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(128px, 168px) minmax(0, 1fr) minmax(128px, 168px);
  gap: 12px;
  align-items: stretch;
}

.team-pad {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  gap: 12px;
  padding: 18px 12px;
  border-radius: 26px;
  color: #fff;
  box-shadow:
    inset 0 0 0 3px rgba(255, 255, 255, 0.22),
    0 12px 0 rgba(16, 48, 72, 0.18);
  overflow: hidden;
}
.team-pad::before {
  content: "";
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  right: -36px;
  top: -28px;
  background: rgba(255, 255, 255, 0.12);
}
.team-pad-a {
  background: linear-gradient(180deg, #56b4e8 0%, #2f86c4 52%, #1f6aa3 100%);
}
.team-pad-b {
  background: linear-gradient(180deg, #ef6d6d 0%, #d24545 52%, #b23333 100%);
}
.team-pad.is-waiting {
  animation: pad-glow 1.6s ease-in-out infinite;
}
.team-pad.is-correct {
  box-shadow:
    inset 0 0 0 3px rgba(255, 255, 255, 0.45),
    0 0 0 4px rgba(80, 210, 130, 0.55),
    0 12px 0 rgba(16, 48, 72, 0.18);
}
.team-pad.is-wrong {
  animation: pad-shake 0.42s ease;
}
.team-pad.is-done {
  filter: saturate(0.85);
}
@keyframes pad-glow {
  50% {
    box-shadow:
      inset 0 0 0 3px rgba(255, 255, 255, 0.35),
      0 0 0 4px rgba(255, 214, 120, 0.35),
      0 12px 0 rgba(16, 48, 72, 0.18);
  }
}
@keyframes pad-shake {
  20% { transform: translateX(-4px); }
  40% { transform: translateX(4px); }
  60% { transform: translateX(-3px); }
  80% { transform: translateX(2px); }
}
.team-pad-name {
  position: relative;
  margin: 0;
  align-self: center;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px 8px 8px;
  border-radius: 999px;
  background: linear-gradient(180deg, #ffd27a, #f0a12a);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  box-shadow: 0 4px 0 #c47a14;
  white-space: nowrap;
}
.team-pad-b .team-pad-name {
  background: linear-gradient(180deg, #ffb36a, #ef6a2e);
  box-shadow: 0 4px 0 #c44a14;
}
.team-ico {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.35);
}
.team-ico svg {
  width: 28px;
  height: 28px;
  display: block;
}
.pad-btn {
  position: relative;
  min-height: 72px;
  border-radius: 20px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  overflow: hidden;
}
.pad-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.22), transparent 42%);
  pointer-events: none;
}
.pad-btn strong {
  position: relative;
  font-size: 1.85rem;
  line-height: 1;
  letter-spacing: 0.02em;
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.12);
}
.pad-ico {
  position: relative;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  filter: drop-shadow(0 2px 0 rgba(0, 0, 0, 0.12));
}
.pad-ico svg {
  width: 30px;
  height: 30px;
  display: block;
}
.pad-btn-a {
  background: linear-gradient(180deg, #7ee8a8, #2faf6a);
  box-shadow: 0 7px 0 #1c8a4d;
}
.pad-btn-b {
  background: linear-gradient(180deg, #8eb4ff, #4f74d8);
  box-shadow: 0 7px 0 #3557b0;
}
.pad-btn:active:not(:disabled) {
  transform: translateY(3px);
}
.pad-btn-a:active:not(:disabled) {
  box-shadow: 0 4px 0 #1c8a4d;
}
.pad-btn-b:active:not(:disabled) {
  box-shadow: 0 4px 0 #3557b0;
}
.pad-btn:disabled {
  cursor: default;
}
.pad-btn.is-right {
  background: linear-gradient(180deg, #9af0b8, #28b86a) !important;
  box-shadow: 0 7px 0 #1d8a4e !important;
}
.pad-btn.is-bad {
  background: linear-gradient(180deg, #f0b0b0, #d15d5d) !important;
  box-shadow: 0 7px 0 #a13e3e !important;
}
.team-status {
  position: relative;
  margin: 4px 0 0;
  min-height: 2.6em;
  text-align: center;
  font-weight: 800;
  font-size: 0.92rem;
  line-height: 1.3;
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.15);
}

.race-column {
  position: relative;
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.speak-fab {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 6;
}
.q-float {
  position: relative;
  z-index: 5;
  margin: 0 56px 0 8px;
  background: var(--paper);
  border: 3px solid #ffe7b0;
  border-radius: 22px;
  padding: 8px 14px 10px;
  box-shadow: 0 8px 0 rgba(31, 90, 50, 0.12);
}
.q-float .q-text {
  font-size: clamp(0.98rem, 1.7vw, 1.2rem);
}
.q-options {
  display: grid;
  gap: 2px;
  margin-top: 6px;
}
.q-opt {
  margin: 0;
  font-weight: 650;
  font-size: 0.92rem;
  line-height: 1.35;
  color: var(--ink-soft);
}
.q-opt b {
  color: var(--ink);
}
.q-opt.is-right {
  color: #1b7a45;
  font-weight: 800;
}
.q-next {
  margin-top: 8px;
  width: 100%;
  min-height: 46px;
}
.q-next[hidden] {
  display: none !important;
}

.race-track {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  background: linear-gradient(180deg, #8ed48a 0%, #5eae62 18%, #3d8c55 100%);
  border-radius: 28px;
  padding: 0;
  overflow: hidden;
  box-shadow:
    0 0 0 4px rgba(255, 255, 255, 0.55),
    0 14px 0 rgba(31, 90, 50, 0.18);
}

.bank {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: 8px;
  flex: 1 1 36px;
  min-height: 40px;
  max-height: 72px;
  padding: 4px 12px;
}
.cheer {
  font-size: 1.7rem;
  line-height: 1;
  animation: cheer-bob 1.3s ease-in-out infinite;
}
.cheer:nth-child(3) {
  animation-delay: 0.2s;
}
.cheer:nth-child(5) {
  animation-delay: 0.45s;
}
@keyframes cheer-bob {
  50% {
    transform: translateY(-4px) scale(1.06);
  }
}
.pennant {
  position: relative;
  width: 3px;
  height: 32px;
  border-radius: 2px;
  background: #fff8e6;
  box-shadow: none;
  animation: none;
}
.pennant::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 0;
  width: 26px;
  height: 16px;
  transform-origin: left center;
  animation: flap 0.55s ease-in-out infinite alternate;
}
.pennant.xanh::after {
  background: linear-gradient(180deg, #7ec8ff, var(--xanh));
  clip-path: polygon(0 0, 100% 18%, 0 100%);
}
.pennant.do::after {
  background: linear-gradient(180deg, #ff9a9a, var(--do));
  clip-path: polygon(0 0, 100% 18%, 0 100%);
  animation-delay: 0.15s;
}
.pennant.vang::after {
  background: linear-gradient(180deg, #ffe38a, #f0b429);
  clip-path: polygon(0 0, 100% 18%, 0 100%);
  animation-delay: 0.3s;
}
@keyframes flap {
  to {
    transform: scaleX(0.72) skewY(-6deg);
  }
}

.river {
  --boat-w: clamp(150px, 36%, 320px);
  position: relative;
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-height: 0;
  margin: 0 8px 8px;
  border-radius: 22px;
  overflow: hidden;
  background: linear-gradient(180deg, #8ad8ee 0%, #4eb6d4 28%, var(--river) 62%, var(--river-deep) 100%);
  box-shadow:
    inset 0 0 0 3px rgba(255, 255, 255, 0.28),
    inset 0 10px 18px rgba(255, 255, 255, 0.2);
}

.current {
  position: absolute;
  inset: -20% -10%;
  background: repeating-linear-gradient(
    100deg,
    transparent 0 26px,
    rgba(255, 255, 255, 0.22) 26px 36px,
    transparent 36px 78px
  );
  animation: flow 2.6s linear infinite;
  pointer-events: none;
  z-index: 0;
}
@keyframes flow {
  to {
    transform: translateX(-78px);
  }
}

.finish-line {
  position: absolute;
  top: 0;
  bottom: 0;
  right: 14px;
  width: 14px;
  z-index: 2;
  background: repeating-linear-gradient(#fff 0 12px, #16324a 12px 24px);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.45);
  pointer-events: none;
}

.midline {
  height: 0;
  border-top: 3px dashed rgba(255, 255, 255, 0.45);
  margin: 0 18px;
  position: relative;
  z-index: 2;
  flex-shrink: 0;
}

.segments {
  position: absolute;
  inset: 0 7% 0 5%;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(circle at 0% 16%, #fff 0 4px, #f0b429 5px 7px, transparent 8px),
    radial-gradient(circle at 25% 16%, #fff 0 4px, #f0b429 5px 7px, transparent 8px),
    radial-gradient(circle at 50% 16%, #fff 0 4px, #f0b429 5px 7px, transparent 8px),
    radial-gradient(circle at 75% 16%, #fff 0 4px, #f0b429 5px 7px, transparent 8px),
    radial-gradient(circle at 100% 16%, #fff 0 4px, #f0b429 5px 7px, transparent 8px);
}

.lane {
  position: relative;
  flex: 1 1 0;
  min-height: 0;
  z-index: 1;
}
.lane-label {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 4;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  text-align: center;
  background: rgba(255, 255, 255, 0.92);
  padding: 3px 10px;
  border-radius: 999px;
}
.lane-label.team-a {
  color: var(--xanh-deep);
}
.lane-label.team-b {
  color: var(--do-deep);
}

.boat {
  position: absolute;
  top: 52%;
  left: calc(4px + (var(--step) / var(--steps)) * (100% - var(--boat-w) - 36px));
  transform: translateY(-50%);
  transition: left 0.7s cubic-bezier(0.2, 0.9, 0.2, 1);
  z-index: 3;
  width: var(--boat-w);
  filter: drop-shadow(0 10px 6px rgba(0, 40, 60, 0.28));
  animation: boat-bob 1.1s ease-in-out infinite;
}
.boat img {
  width: 100%;
  height: auto;
  display: block;
  pointer-events: none;
}
.boat.is-rowing {
  animation: boat-surge 0.55s ease-out;
}
@keyframes boat-bob {
  0%,
  100% {
    transform: translateY(-50%);
  }
  50% {
    transform: translateY(calc(-50% - 5px));
  }
}
@keyframes boat-surge {
  0% {
    transform: translateY(-50%) scale(1);
  }
  40% {
    transform: translateY(calc(-50% - 6px)) translateX(14px) scale(1.05);
  }
  100% {
    transform: translateY(-50%) scale(1);
  }
}

.quiz-dock {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
}

.quiz-board {
  background: var(--paper);
  border: 4px solid var(--edge);
  border-radius: 24px;
  padding: 12px 16px;
  box-shadow: 0 8px 0 rgba(31, 58, 46, 0.1);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.q-kicker {
  margin: 0 0 8px;
  align-self: flex-start;
  background: #ffe28a;
  color: #7a5200;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 999px;
}
.q-text {
  margin: 0;
  font-size: clamp(1.05rem, 4vw, 1.25rem);
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
}

.choices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: auto;
}
#screen-play .choices {
  grid-template-columns: 1fr;
  gap: 10px;
}
#screen-play .choice {
  min-height: 64px;
  flex-direction: row;
  justify-content: flex-start;
  gap: 12px;
  padding: 10px 16px;
  text-align: left;
}
#screen-play .choice strong {
  font-family: var(--font-body);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.35;
}
#screen-play .choice span {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.28);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  font-size: 1.15rem;
}
.choice {
  min-height: 110px;
  border-radius: 24px;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font-family: var(--font-display);
  font-size: 1.25rem;
}
.choice span {
  font-size: 2.4rem;
  line-height: 1;
}
#screen-play .choice span {
  font-size: 1.8rem;
}
.choice-a {
  background: linear-gradient(180deg, #4fd68a, #2faf6a);
  box-shadow: 0 8px 0 #1f8f52;
}
.choice-b {
  background: linear-gradient(180deg, #7ea0ef, #5b7fd6);
  box-shadow: 0 8px 0 #3f63b8;
}
.choice:active:not(:disabled) {
  transform: translateY(4px);
}
.choice:disabled {
  opacity: 0.55;
}

.feedback {
  position: fixed;
  inset: 0;
  z-index: 30;
  background: rgba(20, 50, 60, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.feedback[hidden] {
  display: none !important;
}
.feedback-card {
  width: min(400px, 100%);
  background: #fff;
  border-radius: 28px;
  padding: 24px 18px;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  animation: pop 0.35s cubic-bezier(0.34, 1.4, 0.64, 1);
}
.feedback-card.is-wrong h2 {
  color: #3f63b8;
}
.feedback-emoji {
  font-size: 3rem;
}
.feedback-card h2 {
  margin: 6px 0;
  font-family: var(--font-display);
  color: #1f8f52;
}
.feedback-card p {
  margin: 0 0 16px;
  font-weight: 600;
  color: var(--ink-soft);
  line-height: 1.45;
}

@keyframes pop {
  from {
    transform: scale(0.86);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

#screen-result {
  align-items: center;
  text-align: center;
  padding-top: 40px;
}
.trophy {
  font-size: 4.5rem;
  animation: bob 1s ease-in-out infinite;
}
@keyframes bob {
  50% {
    transform: translateY(-8px);
  }
}
#result-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 2rem;
}
.result-scores {
  display: flex;
  gap: 10px;
}
.score-pill {
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--paper);
  font-weight: 700;
  border: 3px solid var(--edge);
}
.score-pill.team-a {
  border-color: #8ec8f5;
}
.score-pill.team-b {
  border-color: #f5a8a8;
}

@media (max-height: 760px) {
  .bank {
    min-height: 28px;
    max-height: 40px;
  }
  .cheer {
    font-size: 1.1rem;
  }
  .river {
    --boat-w: clamp(140px, 34%, 280px);
  }
  .team-pad {
    gap: 8px;
    padding: 12px 10px;
  }
  .pad-btn {
    min-height: 58px;
  }
  .pad-btn strong {
    font-size: 1.55rem;
  }
  .team-pad-name {
    font-size: 0.92rem;
  }
  .q-float {
    padding: 6px 12px 8px;
  }
}

@media (max-width: 860px) {
  .play-stage {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: minmax(220px, 1fr) auto;
  }
  .race-column {
    grid-column: 1 / -1;
  }
  .river {
    min-height: 200px;
    --boat-w: clamp(150px, 42%, 240px);
  }
}

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