:root {
  color-scheme: light;
  --green: #00e83b;
  --dark-green: #0a320a;
  --red: #dc2424;
  --dark-red: #720d0d;
  --paper: #f8fff5;
  --ink: #092609;
}

* { box-sizing: border-box; }

body {
  min-height: 100svh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(12, 65, 17, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(12, 65, 17, .055) 1px, transparent 1px),
    radial-gradient(circle at 15% 10%, rgba(0, 232, 59, .14), transparent 30rem),
    #eef5e9;
  background-size: 24px 24px, 24px 24px, auto, auto;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overscroll-behavior: none;
}

button { font: inherit; }

.game-shell {
  width: min(850px, calc(100% - 30px));
  margin: 0 auto;
  padding: max(18px, env(safe-area-inset-top)) 0 max(24px, env(safe-area-inset-bottom));
}

.game-header {
  display: flex;
  padding: 3px 2px 15px;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
}

.eyebrow {
  color: #537653;
  font-size: .67rem;
  font-weight: 850;
  letter-spacing: .16em;
  text-transform: uppercase;
}

h1 {
  margin: 2px 0 0;
  color: var(--dark-green);
  font: 800 clamp(3rem, 9vw, 6.2rem)/.84 Georgia, serif;
  letter-spacing: -.075em;
}

.header-actions {
  display: flex;
  gap: 9px;
}

.utility-button,
.primary-button,
.controls button {
  min-height: 46px;
  padding: 0 17px;
  border: 1px solid rgba(10, 50, 10, .23);
  border-radius: 999px;
  color: var(--dark-green);
  background: rgba(255, 255, 255, .76);
  font-weight: 750;
  cursor: pointer;
  touch-action: manipulation;
}

.help-button {
  color: #fff;
  border-color: var(--dark-green);
  background: var(--dark-green);
}

.game-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.stage-card {
  position: relative;
  overflow: hidden;
  border: 3px solid var(--dark-green);
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 8px 0 var(--dark-green), 0 28px 80px rgba(14, 50, 14, .18);
}

canvas {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  background: #fff;
  touch-action: none;
}

.game-overlay {
  position: absolute;
  inset: 0;
  display: none;
  padding: 18px;
  place-items: center;
  background: rgba(242, 250, 238, .76);
  backdrop-filter: blur(8px);
}

.game-overlay.is-visible { display: grid; }

.overlay-panel {
  width: min(490px, 100%);
  max-height: calc(100% - 8px);
  overflow-y: auto;
  padding: clamp(24px, 6vw, 46px);
  border: 1px solid rgba(10, 50, 10, .22);
  border-radius: 22px;
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 22px 65px rgba(10, 50, 10, .17);
  text-align: center;
}

.overlay-kicker {
  color: var(--red);
  font-size: .68rem;
  font-weight: 850;
  letter-spacing: .17em;
  text-transform: uppercase;
}

.overlay-panel h2 {
  margin: 10px 0 0;
  color: var(--dark-green);
  font: 800 clamp(2rem, 7vw, 3.4rem)/.95 Georgia, serif;
  letter-spacing: -.055em;
}

.overlay-text {
  margin: 15px 0 23px;
  color: #4e674e;
  font-size: .87rem;
  line-height: 1.5;
  text-align: left;
}

.overlay-text p { margin: 0 0 13px; }
.overlay-text ul { margin: 0; padding-left: 19px; }
.overlay-text li + li { margin-top: 7px; }

.primary-button {
  width: 100%;
  color: #fff;
  border-color: var(--dark-green);
  background: var(--dark-green);
}

.controls {
  display: none;
  width: 186px;
  margin: 18px auto 0;
  grid-template: repeat(2, 58px) / repeat(3, 58px);
  gap: 6px;
}

.controls button {
  width: 58px;
  min-height: 58px;
  padding: 0;
  border-radius: 17px;
  font-size: 1.35rem;
}

.controls button:active,
.controls button.is-active {
  color: #fff;
  background: var(--dark-green);
  transform: translateY(2px);
}

.controls .up { grid-column: 2; }
.controls .left { grid-row: 2; grid-column: 1; }
.controls .down { grid-row: 2; grid-column: 2; }
.controls .right { grid-row: 2; grid-column: 3; }

.game-footer {
  display: flex;
  padding: 19px 3px 0;
  justify-content: space-between;
  gap: 20px;
  color: #527052;
  font-size: .72rem;
}

@media (hover: none), (pointer: coarse), (max-width: 760px) {
  .controls { display: grid; }
}

@media (max-width: 620px) {
  .game-shell { width: calc(100% - 18px); }
  .game-header { align-items: center; }
  h1 { font-size: 3.2rem; }
  .utility-button { min-height: 42px; padding: 0 13px; font-size: .74rem; }
  .stage-card { border-radius: 16px; }
  .game-footer { display: none; }
}

@media (max-width: 420px) {
  .game-header { align-items: flex-start; flex-direction: column; }
  .header-actions { width: 100%; }
  .utility-button { flex: 1; }
}

@media (max-height: 560px) and (orientation: landscape) {
  .game-shell { width: min(calc(100% - 18px), 850px); padding: 7px 0; }
  .game-header {
    position: absolute;
    z-index: 4;
    top: 14px;
    right: 18px;
    padding: 0;
  }
  .game-header > div:first-child,
  #soundButton { display: none; }
  .game-layout {
    grid-template-columns: minmax(0, 1fr) 190px;
    align-items: center;
    gap: 16px;
  }
  canvas { height: calc(100svh - 22px); width: auto; max-width: 100%; }
  .controls { display: grid; margin: 0 auto; }
  .game-footer { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; }
}