* {
  box-sizing: border-box;
}

:root {
  --bg-a: #071d12;
  --bg-b: #163a22;
  --duck-yellow: #ffd34e;
  --duck-yellow-dark: #f1b200;
  --duck-beak: #ff6a00;
  --ink: #07180f;
  --panel: rgba(144, 221, 126, 0.1);
  --panel-border: rgba(196, 255, 179, 0.26);
  --frog-leaf: #7fda51;
  --frog-leaf-dark: #3f8f2b;
  --frog-pond: #123f3b;
  --frog-moss: #1c5a40;
  --px: 4px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Courier New", monospace;
  color: #f4fbff;
  background:
    radial-gradient(circle at 12% 16%, rgba(173, 245, 132, 0.18), transparent 35%),
    radial-gradient(circle at 82% 78%, rgba(87, 201, 149, 0.22), transparent 36%),
    radial-gradient(circle at 48% 40%, rgba(39, 110, 67, 0.24), transparent 52%),
    linear-gradient(145deg, var(--bg-a), var(--bg-b));
  display: grid;
  place-items: center;
}

.app {
  width: min(94vw, 1120px);
  text-align: center;
  padding: 1.4rem 1rem 2rem;
}

.home-link {
  color: #d8ffba;
  text-decoration: none;
  border: 1px solid rgba(203, 255, 178, 0.45);
  background: rgba(54, 132, 68, 0.25);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.home-link:hover {
  background: rgba(87, 173, 83, 0.32);
}

h1 {
  margin: 1rem 0 0.35rem;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.1;
  color: #d7ffb0;
  text-shadow: 0 5px 20px rgba(0, 0, 0, 0.35);
}

.subtitle {
  margin: 0 0 1.2rem;
  color: #bff0b8;
  opacity: 0.95;
  font-size: clamp(1rem, 2.8vw, 1.2rem);
}

.layout {
  margin-top: 1.1rem;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(250px, 0.9fr);
  gap: 1rem;
  align-items: start;
}

.game-panel {
  padding: 0.9rem;
  border-radius: 16px;
  background:
    radial-gradient(circle at 75% 20%, rgba(165, 255, 143, 0.12), transparent 36%),
    linear-gradient(180deg, rgba(16, 58, 36, 0.72), rgba(11, 44, 29, 0.78));
  border: 1px solid var(--panel-border);
}

.scoreboard {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
  padding: 0.55rem;
  border-radius: 16px;
  background: rgba(96, 173, 94, 0.16);
  border: 1px solid rgba(193, 255, 175, 0.22);
  margin-bottom: 1rem;
}

.upgrades {
  padding: 0.8rem;
  border-radius: 16px;
  background:
    radial-gradient(circle at 20% 18%, rgba(176, 255, 125, 0.18), transparent 28%),
    radial-gradient(circle at 82% 74%, rgba(127, 218, 81, 0.2), transparent 30%),
    linear-gradient(180deg, rgba(14, 60, 46, 0.92), rgba(9, 40, 33, 0.95));
  border: 1px solid rgba(165, 236, 127, 0.34);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.06),
    0 18px 34px rgba(0, 0, 0, 0.28);
}

.upgrades-panel {
  text-align: left;
}

.upgrades-panel h2 {
  margin: 0 0 0.75rem;
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  color: #cfffad;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}

.upgrade-button {
  width: 100%;
  border: 1px solid rgba(220, 255, 185, 0.52);
  border-radius: 12px;
  background:
    radial-gradient(circle at 12% 18%, rgba(236, 255, 208, 0.35), transparent 34%),
    linear-gradient(180deg, #8be95f, #4ea43b);
  color: #0f2b11;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 0.72rem 0.8rem;
  cursor: pointer;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.28),
    0 8px 15px rgba(7, 28, 18, 0.35);
  transition: transform 90ms ease, filter 120ms ease, box-shadow 120ms ease;
}

.upgrade-button:hover:enabled {
  filter: brightness(1.05);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.3),
    0 10px 18px rgba(7, 28, 18, 0.42);
}

.upgrade-button:active:enabled {
  transform: scale(0.99);
}

.upgrade-button:disabled {
  cursor: not-allowed;
  opacity: 0.62;
  filter: saturate(0.7);
}

.upgrades-panel .upgrade-button:nth-of-type(2) {
  background:
    radial-gradient(circle at 90% 22%, rgba(236, 255, 208, 0.3), transparent 32%),
    linear-gradient(180deg, #79d8ac, #358a69);
  border-color: rgba(192, 255, 231, 0.45);
}

.upgrades-panel .upgrade-button:nth-of-type(3) {
  background:
    radial-gradient(circle at 18% 18%, rgba(255, 253, 203, 0.32), transparent 34%),
    linear-gradient(180deg, #c0f278, #6cab3f);
  border-color: rgba(233, 255, 176, 0.5);
}

.upgrades-panel .upgrade-button:nth-of-type(4) {
  background:
    radial-gradient(circle at 84% 18%, rgba(225, 255, 245, 0.34), transparent 34%),
    linear-gradient(180deg, #95efd1, #3ea582);
  border-color: rgba(198, 255, 238, 0.52);
}

.upgrades-panel .upgrade-button:nth-of-type(5) {
  background:
    radial-gradient(circle at 18% 22%, rgba(247, 255, 219, 0.36), transparent 34%),
    linear-gradient(180deg, #d4f784, #78b63f);
  border-color: rgba(235, 255, 190, 0.56);
}

.upgrades-panel .upgrade-button:nth-of-type(6) {
  background:
    radial-gradient(circle at 82% 20%, rgba(232, 255, 250, 0.34), transparent 36%),
    linear-gradient(180deg, #aaf4de, #4ab489);
  border-color: rgba(210, 255, 245, 0.56);
}

.upgrades-panel .upgrade-button:nth-of-type(7) {
  background:
    radial-gradient(circle at 14% 20%, rgba(242, 255, 228, 0.36), transparent 36%),
    linear-gradient(180deg, #dbf8a6, #8ac255);
  border-color: rgba(232, 255, 197, 0.58);
}

.upgrades-panel .upgrade-button:nth-of-type(8) {
  background:
    radial-gradient(circle at 84% 20%, rgba(246, 255, 230, 0.36), transparent 36%),
    linear-gradient(180deg, #e4fcb5, #93c85a);
  border-color: rgba(238, 255, 205, 0.6);
}

.upgrades-panel .upgrade-button:nth-of-type(9) {
  background:
    radial-gradient(circle at 14% 20%, rgba(250, 255, 236, 0.36), transparent 36%),
    linear-gradient(180deg, #ecfcc4, #a1d06b);
  border-color: rgba(244, 255, 218, 0.62);
}

.upgrades-panel .upgrade-button:nth-of-type(10) {
  background:
    radial-gradient(circle at 84% 20%, rgba(245, 255, 238, 0.38), transparent 36%),
    linear-gradient(180deg, #f0fdcc, #add675);
  border-color: rgba(246, 255, 221, 0.64);
}

.upgrade-status {
  margin: 0.55rem 0 0;
  font-size: 0.88rem;
  color: #dffcc8;
  opacity: 0.95;
}

.upgrade-button + .upgrade-status {
  margin-bottom: 0.85rem;
}

.score-card {
  min-width: 0;
  min-height: 98px;
  padding: 0.7rem 0.8rem;
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(169, 250, 131, 0.2), rgba(78, 153, 79, 0.14));
  border: 1px solid rgba(220, 255, 202, 0.28);
  display: grid;
  align-content: center;
  justify-items: center;
}

.label {
  display: block;
  font-size: clamp(0.68rem, 1.1vw, 0.82rem);
  letter-spacing: 0.06em;
  color: #d2f9c4;
  opacity: 0.92;
  text-transform: uppercase;
  line-height: 1.2;
}

.value {
  display: block;
  margin-top: 0.2rem;
  font-size: clamp(1.35rem, 2.9vw, 2.05rem);
  font-weight: 800;
  color: #edffd8;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 3px 14px rgba(0, 0, 0, 0.32);
}

.duck-button {
  position: relative;
  width: 100%;
  aspect-ratio: 1.45 / 1;
  border: none;
  border-radius: 24px;
  background:
    radial-gradient(circle at 26% 30%, rgba(205, 255, 180, 0.18), transparent 36%),
    radial-gradient(circle at 74% 68%, rgba(66, 165, 88, 0.22), transparent 43%),
    linear-gradient(180deg, rgba(44, 112, 63, 0.62), rgba(19, 66, 43, 0.7));
  box-shadow:
    0 20px 48px rgba(0, 0, 0, 0.35),
    inset 0 0 0 1px rgba(205, 255, 185, 0.24);
  cursor: pointer;
  overflow: hidden;
  transition: transform 90ms ease;
  --ripple-x: 50%;
  --ripple-y: 58%;
}

.duck-button::after {
  content: "";
  position: absolute;
  left: var(--ripple-x);
  top: var(--ripple-y);
  width: 22%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  border: 2px solid rgba(198, 255, 188, 0.7);
  transform: translate(-50%, -50%) scale(0.25);
  opacity: 0;
  pointer-events: none;
}

.duck-button:active {
  transform: scale(0.98);
}

.duck {
  position: absolute;
  left: 50%;
  top: 60%;
  transform: translate(-50%, -50%) scale(1, 1.22);
  --pixel-size: clamp(7px, 1.5vw, 13px);
  --cols: 22;
  display: grid;
  grid-template-columns: repeat(var(--cols), var(--pixel-size));
  grid-auto-rows: var(--pixel-size);
  filter: drop-shadow(0 10px 0 rgba(0, 0, 0, 0.24));
  image-rendering: pixelated;
}

.duck-cell {
  width: var(--pixel-size);
  height: var(--pixel-size);
}

.duck-cell--o { background: #000000; }
.duck-cell--y { background: #63b94a; }
.duck-cell--s { background: #3e7b2f; }
.duck-cell--b { background: #e88da3; }
.duck-cell--k { background: #2f6b25; }
.duck-cell--g { background: #9ee874; }
.duck-cell--w { background: #ffffff; }
.duck-cell--f { background: #7a4e27; }
.duck-cell--e { background: #111111; }
.duck-cell--c { background: #5a9a43; }
.duck-cell--m { background: #8fd16f; }
.duck-cell--r { background: #d9687d; }

.mobile-placeholder {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-a);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  text-align: center;
  padding: 2rem;
  font-family: 'Segoe UI', Tahoma, sans-serif;
}
.mobile-placeholder svg {
  width: 120px;
  height: 120px;
}
.mobile-placeholder p {
  color: #7fda51;
  font-size: 1.3rem;
  letter-spacing: 0.05em;
  line-height: 1.5;
}

@media (max-width: 1024px) {
  .mobile-placeholder { display: flex; }
}

@media (max-width: 560px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .scoreboard {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .score-card {
    min-height: 86px;
  }

  .duck {
    --pixel-size: clamp(5px, 2.1vw, 9px);
  }
}

.duck-button.pop .duck {
  animation: frog-hop 250ms cubic-bezier(0.2, 0.85, 0.3, 1);
}

.duck-button.pop::after {
  animation: ripple-burst 320ms ease-out;
}

.floating-plus {
  position: absolute;
  font-size: clamp(1.2rem, 2.2vw, 1.8rem);
  font-weight: 900;
  color: #d8ffd0;
  text-shadow: 0 5px 14px rgba(0, 0, 0, 0.45);
  pointer-events: none;
  animation: rise 600ms ease-out forwards;
}

@keyframes frog-hop {
  0% { transform: translate(-50%, -50%) scale(1, 1.22); }
  20% { transform: translate(-50%, -45%) scale(0.94, 1.34) rotate(-2deg); }
  55% { transform: translate(-50%, -58%) scale(1.1, 1.2) rotate(2deg); }
  100% { transform: translate(-50%, -50%) scale(1, 1.22); }
}

@keyframes ripple-burst {
  0% {
    transform: translate(-50%, -50%) scale(0.25);
    opacity: 0.75;
  }
  100% {
    transform: translate(-50%, -50%) scale(2.5);
    opacity: 0;
  }
}

@keyframes rise {
  0% { transform: translate(-50%, -50%) scale(0.8); opacity: 1; }
  100% { transform: translate(-50%, -220%) scale(1.15); opacity: 0; }
}