:root {
  --ink: #17364a;
  --ink-soft: #41667a;
  --cream: #fffaf0;
  --yellow: #ffd45c;
  --orange: #ff8b4a;
  --green: #56c985;
  --sky: #74d5ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--sky);
  color: var(--ink);
  font-family: "Avenir Next", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

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

button {
  font: inherit;
}

.game-shell {
  position: fixed;
  inset: 0;
  min-height: 100dvh;
  overflow: hidden;
  isolation: isolate;
  background: var(--sky);
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

#gameCanvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  outline: none;
  touch-action: none;
}

.hud {
  position: absolute;
  z-index: 4;
  top: max(14px, env(safe-area-inset-top));
  left: max(14px, env(safe-area-inset-left));
  right: max(14px, env(safe-area-inset-right));
  display: grid;
  grid-template-columns: minmax(92px, 1fr) minmax(150px, 260px) minmax(92px, 1fr);
  align-items: start;
  pointer-events: none;
}

.hud-chip,
.score-card,
.sound-button {
  border: 2px solid rgba(255, 255, 255, 0.62);
  outline: 1px solid rgba(23, 54, 74, 0.15);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.97), rgba(243, 247, 232, 0.88));
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.9),
    inset 0 -2px 0 rgba(74, 104, 111, 0.08),
    0 7px 0 rgba(23, 54, 74, 0.14),
    0 13px 30px rgba(28, 106, 145, 0.18);
  backdrop-filter: blur(9px);
  -webkit-backdrop-filter: blur(9px);
}

.hud-chip {
  justify-self: start;
  min-width: 112px;
  height: 49px;
  padding: 7px 13px;
  border-radius: 15px;
}

.hud-label {
  display: block;
  margin-bottom: 1px;
  color: var(--ink-soft);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.14em;
}

#hearts {
  display: block;
  color: #ff5b65;
  font-size: 15px;
  line-height: 1;
  letter-spacing: 2px;
  text-shadow: 0 2px 0 #fff;
}

.score-card {
  justify-self: center;
  width: min(100%, 260px);
  padding: 8px 13px 10px;
  border-radius: 16px;
}

.score-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 7px;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}

.score-row strong {
  color: var(--ink);
  font-size: 17px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

.progress-track {
  height: 6px;
  overflow: hidden;
  border-radius: 99px;
  background: #dceff1;
  border: 1px solid rgba(35, 78, 88, 0.12);
  box-shadow: inset 0 2px 3px rgba(23, 54, 74, 0.18), 0 1px 0 #fff;
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #ffcf50, #ff8148);
  box-shadow: inset 0 2px 0 rgba(255, 255, 255, 0.38), 0 0 7px rgba(255, 137, 68, 0.36);
  transition: width 180ms linear;
}

.sound-button {
  justify-self: end;
  display: grid;
  place-items: center;
  width: 49px;
  height: 49px;
  padding: 0;
  border-radius: 15px;
  color: var(--ink);
  font-size: 22px;
  font-weight: 900;
  cursor: pointer;
  pointer-events: auto;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.sound-button:active {
  transform: translateY(4px);
  box-shadow: 0 2px 0 rgba(23, 54, 74, 0.12), 0 5px 12px rgba(28, 106, 145, 0.12);
}

.gesture-hint {
  position: absolute;
  z-index: 4;
  left: 50%;
  bottom: max(18px, calc(env(safe-area-inset-bottom) + 10px));
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 10px 15px;
  border: 2px solid rgba(23, 54, 74, 0.1);
  border-radius: 999px;
  background: linear-gradient(145deg, rgba(255,255,255,0.94), rgba(245,248,231,0.88));
  box-shadow:
    inset 0 2px 0 rgba(255,255,255,0.9),
    0 6px 0 rgba(23, 54, 74, 0.12),
    0 12px 26px rgba(28, 106, 145, 0.16);
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 700;
  opacity: 0;
  transform: translate(-50%, 15px);
  transition: opacity 260ms ease, transform 260ms ease;
  pointer-events: none;
  white-space: nowrap;
}

.gesture-hint.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.gesture-hint b {
  color: var(--ink);
}

.gesture-hint i {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: #88a7b7;
}

.game-overlay {
  position: absolute;
  z-index: 6;
  inset: 0;
  display: grid;
  place-items: center;
  padding: max(74px, calc(env(safe-area-inset-top) + 65px)) 18px max(22px, env(safe-area-inset-bottom));
  background: rgba(32, 109, 145, 0.12);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: opacity 240ms ease, visibility 240ms ease;
}

.game-overlay.is-hidden {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

.game-card {
  width: min(94vw, 480px);
  padding: 27px 28px 23px;
  overflow: hidden;
  border: 3px solid rgba(255, 255, 255, 0.72);
  outline: 2px solid rgba(23, 54, 74, 0.16);
  border-radius: 28px;
  background: linear-gradient(155deg, rgba(255,255,255,0.98), rgba(255,247,225,0.96));
  box-shadow:
    inset 0 3px 0 rgba(255,255,255,0.95),
    inset 0 -4px 0 rgba(119, 86, 54, 0.08),
    0 12px 0 rgba(23, 54, 74, 0.16),
    0 30px 76px rgba(20, 91, 126, 0.3);
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  padding: 5px 11px;
  border-radius: 999px;
  background: #e8f7ee;
  color: #27845a;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.game-card h1 {
  margin: 14px 0 8px;
  color: var(--ink);
  font-size: clamp(32px, 8vw, 48px);
  line-height: 1.04;
  font-weight: 1000;
  letter-spacing: -0.055em;
  text-shadow: 0 3px 0 #fff, 0 5px 0 rgba(23, 54, 74, 0.09);
}

.overlay-copy {
  margin: 0 auto;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.6;
}

.control-preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 19px 0 18px;
}

.control-preview > div {
  display: grid;
  justify-items: center;
  gap: 4px;
  min-width: 0;
  padding: 14px 8px 12px;
  border: 2px solid rgba(255,255,255,0.9);
  outline: 1px solid #c9dfe1;
  border-radius: 18px;
  background: linear-gradient(145deg, #ffffff, #eaf6f2);
  box-shadow: inset 0 2px 0 #fff, 0 4px 0 #d3e4e2, 0 8px 15px rgba(53, 93, 102, 0.08);
}

.control-preview span {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 2px;
  border-radius: 11px;
  background: #fff;
  color: #f27a43;
  box-shadow: inset 0 2px 0 #fff, 0 4px 0 #cbdedf, 0 7px 12px rgba(44, 86, 94, 0.12);
  font-size: 19px;
  font-weight: 1000;
}

.control-preview strong {
  color: var(--ink);
  font-size: 13px;
}

.control-preview small {
  overflow: hidden;
  color: #6c8a98;
  font-size: 10px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.result-line {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 4px 14px;
  margin: 20px 0 17px;
  padding: 15px 17px;
  border-radius: 17px;
  background: #eef8f3;
  text-align: left;
}

.result-line > span:first-child {
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 800;
}

.result-line > strong {
  grid-row: 1 / 3;
  grid-column: 2;
  color: #ef7541;
  font-size: 29px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.best-score {
  color: #5f7f8c;
  font-size: 10px;
  font-weight: 750;
}

.is-hidden {
  display: none !important;
}

.start-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  min-height: 54px;
  padding: 11px 20px;
  border: 2px solid rgba(255,255,255,0.56);
  outline: 1px solid rgba(127,68,25,0.24);
  border-radius: 17px;
  background: linear-gradient(180deg, #ffe477 0%, #ffc450 45%, #f99a39 100%);
  box-shadow:
    inset 0 3px 0 rgba(255,255,255,0.5),
    inset 0 -3px 0 rgba(186,87,24,0.16),
    0 7px 0 #c86c30,
    0 14px 27px rgba(201, 98, 38, 0.27);
  color: #633914;
  font-size: 16px;
  font-weight: 950;
  cursor: pointer;
  transition: transform 110ms ease, box-shadow 110ms ease;
}

.start-button span {
  font-size: 22px;
  line-height: 1;
}

.start-button:active {
  transform: translateY(6px);
  box-shadow: inset 0 2px 0 rgba(255,255,255,0.38), 0 1px 0 #c86c30, 0 5px 12px rgba(232, 125, 52, 0.17);
}

.start-button:focus-visible,
.sound-button:focus-visible,
#gameCanvas:focus-visible {
  outline: 4px solid rgba(255, 123, 69, 0.52);
  outline-offset: 3px;
}

.keyboard-tip {
  margin: 15px 0 0;
  color: #7893a0;
  font-size: 10px;
  font-weight: 700;
}

.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: 620px) {
  .hud {
    top: max(9px, env(safe-area-inset-top));
    left: max(9px, env(safe-area-inset-left));
    right: max(9px, env(safe-area-inset-right));
    grid-template-columns: 82px 1fr 44px;
    gap: 7px;
  }

  .hud-chip {
    min-width: 0;
    width: 82px;
    height: 43px;
    padding: 6px 9px;
    border-radius: 13px;
  }

  #hearts {
    font-size: 12px;
    letter-spacing: 0;
  }

  .hud-label {
    font-size: 8px;
  }

  .score-card {
    width: 100%;
    padding: 7px 10px 8px;
    border-radius: 13px;
  }

  .score-row {
    margin-bottom: 5px;
    font-size: 8px;
  }

  .score-row strong {
    font-size: 14px;
  }

  .sound-button {
    width: 43px;
    height: 43px;
    border-radius: 13px;
    font-size: 19px;
  }

  .game-card {
    width: min(94vw, 430px);
    padding: 24px 20px 20px;
    border-radius: 24px;
  }

  .control-preview {
    margin-top: 17px;
  }

  .gesture-hint {
    bottom: max(12px, calc(env(safe-area-inset-bottom) + 7px));
    padding: 9px 13px;
    font-size: 11px;
  }
}

@media (max-height: 590px) {
  .game-overlay {
    padding-top: 70px;
  }

  .game-card {
    width: min(88vw, 520px);
    padding: 17px 22px 16px;
  }

  .game-card h1 {
    margin: 8px 0 5px;
    font-size: 30px;
  }

  .eyebrow {
    min-height: 22px;
    padding: 3px 9px;
    font-size: 9px;
  }

  .overlay-copy {
    font-size: 12px;
  }

  .control-preview {
    margin: 11px 0 12px;
  }

  .control-preview > div {
    grid-template-columns: auto auto;
    justify-content: center;
    align-items: center;
    gap: 2px 8px;
    padding: 8px;
  }

  .control-preview span {
    grid-row: 1 / 3;
    width: 29px;
    height: 29px;
    margin: 0;
    font-size: 15px;
  }

  .control-preview small {
    display: none;
  }

  .keyboard-tip {
    display: none;
  }

  .start-button {
    min-height: 46px;
  }

  .result-line {
    margin: 11px 0 12px;
    padding: 10px 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}