:root {
  --bg: #09030d;
  --bg-deep: #030105;
  --text: #fbf4ff;
  --muted: rgba(244, 228, 255, 0.72);
  --panel: rgba(12, 8, 16, 0.46);
  --panel-strong: rgba(24, 12, 34, 0.82);
  --line: rgba(255, 255, 255, 0.12);
  --line-strong: rgba(255, 255, 255, 0.2);
  --pink: #ff6ca8;
  --amber: #ffc772;
  --cyan: #87ecff;
  --shadow: rgba(0, 0, 0, 0.36);
  --shell-max-width: 520px;
  --shell-max-height: 980px;
  --shell-ratio: 0.531;
}

* {
  box-sizing: border-box;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  margin: 0;
  width: 100%;
  min-height: 100%;
  overflow: hidden;
  touch-action: manipulation;
  overscroll-behavior: none;
  background:
    radial-gradient(circle at 50% 14%, rgba(255, 170, 217, 0.18), transparent 26%),
    radial-gradient(circle at 18% 82%, rgba(97, 198, 255, 0.14), transparent 24%),
    linear-gradient(180deg, #130814 0%, var(--bg) 46%, var(--bg-deep) 100%);
  color: var(--text);
  font-family: "Avenir Next", "Trebuchet MS", "PingFang TC", "Noto Sans TC", sans-serif;
}

body {
  display: grid;
  place-items: center;
  min-height: 100svh;
  min-height: 100dvh;
  padding:
    max(12px, env(safe-area-inset-top))
    max(12px, env(safe-area-inset-right))
    max(12px, env(safe-area-inset-bottom))
    max(12px, env(safe-area-inset-left));
}

button {
  font: inherit;
  color: inherit;
}

.backdrop {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.glow {
  position: absolute;
  border-radius: 999px;
  filter: blur(32px);
  opacity: 0.75;
  animation: float 12s ease-in-out infinite;
}

.glow-a {
  top: -10vh;
  left: -12vw;
  width: 52vw;
  height: 42vw;
  background: radial-gradient(circle, rgba(255, 90, 149, 0.34), transparent 66%);
}

.glow-b {
  right: -18vw;
  bottom: -18vh;
  width: 60vw;
  height: 48vw;
  background: radial-gradient(circle, rgba(78, 193, 255, 0.22), transparent 68%);
  animation-delay: -5s;
}

.grid-noise {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.016) 1px, transparent 1px),
    linear-gradient(180deg, rgba(255, 255, 255, 0.016) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(circle at center, rgba(0, 0, 0, 0.72), transparent 88%);
  opacity: 0.55;
}

.app-shell {
  position: relative;
  width: min(
    var(--shell-max-width),
    calc(100vw - 24px - env(safe-area-inset-left) - env(safe-area-inset-right)),
    calc((100svh - 24px - env(safe-area-inset-top) - env(safe-area-inset-bottom)) * var(--shell-ratio))
  );
  height: min(
    var(--shell-max-height),
    calc(100svh - 24px - env(safe-area-inset-top) - env(safe-area-inset-bottom)),
    calc((100vw - 24px - env(safe-area-inset-left) - env(safe-area-inset-right)) / var(--shell-ratio))
  );
  max-width: 100%;
  max-height: calc(100svh - 24px - env(safe-area-inset-top) - env(safe-area-inset-bottom));
}

@supports (height: 100dvh) {
  .app-shell {
    width: min(
      var(--shell-max-width),
      calc(100vw - 24px - env(safe-area-inset-left) - env(safe-area-inset-right)),
      calc((100dvh - 24px - env(safe-area-inset-top) - env(safe-area-inset-bottom)) * var(--shell-ratio))
    );
    height: min(
      var(--shell-max-height),
      calc(100dvh - 24px - env(safe-area-inset-top) - env(safe-area-inset-bottom)),
      calc((100vw - 24px - env(safe-area-inset-left) - env(safe-area-inset-right)) / var(--shell-ratio))
    );
    max-height: calc(100dvh - 24px - env(safe-area-inset-top) - env(safe-area-inset-bottom));
  }
}

.frame {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 34px;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(26, 8, 31, 0.9), rgba(8, 6, 17, 0.96)),
    radial-gradient(circle at 50% 8%, rgba(255, 188, 128, 0.12), transparent 28%);
  border: 1px solid var(--line);
  box-shadow:
    0 28px 80px rgba(0, 0, 0, 0.42),
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    inset 0 -18px 40px rgba(0, 0, 0, 0.24);
}

.frame::before,
.frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.frame::before {
  background:
    radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.06), transparent 28%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 8%, transparent 92%, rgba(255, 255, 255, 0.04));
}

.frame::after {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.04), transparent 10%, transparent 90%, rgba(255, 255, 255, 0.04));
  opacity: 0.48;
}

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

.hud,
.message,
.touch-guides,
.overlay {
  position: absolute;
  inset: 0;
}

.hud {
  pointer-events: none;
  z-index: 2;
}

.chip {
  display: none;
}

.chip-left {
  left: 14px;
}

.chip-right {
  right: 146px;
}

.hud-actions {
  position: absolute;
  top: 14px;
  right: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  pointer-events: auto;
}

.camera-btn,
.restart-btn {
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border: 0;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--text);
  background:
    linear-gradient(180deg, rgba(255, 131, 180, 0.92), rgba(80, 24, 56, 0.96));
  box-shadow:
    0 12px 18px rgba(0, 0, 0, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.12);
  cursor: pointer;
}

.camera-btn {
  background:
    linear-gradient(180deg, rgba(132, 219, 255, 0.92), rgba(32, 83, 123, 0.96));
}

.camera-btn.active {
  background:
    linear-gradient(180deg, rgba(255, 202, 136, 0.94), rgba(155, 86, 26, 0.98));
}

.restart-btn {
  padding: 0;
  width: 36px;
  background:
    linear-gradient(180deg, rgba(255, 131, 180, 0.92), rgba(80, 24, 56, 0.96));
}

.camera-btn svg,
.restart-btn svg {
  width: 18px;
  height: 18px;
}

.camera-label {
  font-size: 0.62rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  line-height: 1;
}

.message {
  z-index: 2;
  pointer-events: none;
  display: grid;
  justify-items: center;
  align-content: start;
  padding-top: 66px;
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity 220ms ease, transform 220ms ease;
}

.message.show {
  opacity: 1;
  transform: translateY(0);
}

.message-title,
.message-sub {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  max-width: calc(100% - 36px);
}

.message-title {
  padding: 10px 14px;
  border-radius: 999px;
  background:
    linear-gradient(180deg, rgba(26, 13, 34, 0.86), rgba(10, 7, 16, 0.82));
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.28);
  font-size: clamp(0.9rem, 3.8vw, 1.08rem);
  font-weight: 900;
  letter-spacing: 0.12em;
}

.message-sub {
  margin-top: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(10, 6, 14, 0.42);
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.touch-guides {
  z-index: 1;
  pointer-events: none;
}

.touch-zone {
  position: absolute;
  left: 10px;
  right: 10px;
  border-radius: 22px;
  border: 1px dashed rgba(255, 255, 255, 0.08);
  opacity: 0;
  transition: opacity 200ms ease;
}

.touch-zone.visible {
  opacity: 1;
}

.tetris-zone {
  top: 56px;
  height: 26%;
  background: linear-gradient(180deg, rgba(255, 130, 167, 0.06), transparent);
}

.breakout-zone {
  display: none;
}

.overlay {
  z-index: 3;
  display: grid;
  place-items: center;
  padding:
    max(16px, env(safe-area-inset-top))
    max(16px, env(safe-area-inset-right))
    max(16px, env(safe-area-inset-bottom))
    max(16px, env(safe-area-inset-left));
  background: rgba(4, 3, 7, 0.54);
  backdrop-filter: blur(12px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms ease;
}

.overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.dialog {
  width: min(92vw, 340px);
  padding: 18px;
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(39, 17, 50, 0.9), rgba(12, 7, 18, 0.92)),
    radial-gradient(circle at top, rgba(255, 175, 121, 0.12), transparent 58%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow:
    0 28px 56px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.09);
}

.slim-dialog {
  width: min(84vw, 280px);
  text-align: center;
}

.compatibility-dialog {
  background:
    linear-gradient(180deg, rgba(35, 24, 17, 0.94), rgba(15, 10, 8, 0.96)),
    radial-gradient(circle at top, rgba(255, 191, 122, 0.18), transparent 56%);
}

.compatibility-icon {
  width: 68px;
  height: 68px;
  margin: 0 auto 14px;
  border-radius: 22px;
  background:
    linear-gradient(180deg, rgba(255, 207, 122, 0.94), rgba(218, 118, 52, 0.96));
  box-shadow:
    0 16px 32px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.24);
  display: grid;
  place-items: center;
}

.compatibility-icon span {
  position: relative;
  width: 36px;
  height: 28px;
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgba(41, 22, 8, 0.96), rgba(19, 10, 4, 0.98));
  box-shadow:
    inset 0 0 0 2px rgba(255, 220, 153, 0.18),
    0 6px 14px rgba(0, 0, 0, 0.22);
}

.compatibility-icon span::before,
.compatibility-icon span::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.compatibility-icon span::before {
  top: 5px;
  width: 16px;
  height: 10px;
  border-radius: 3px;
  background: rgba(255, 205, 116, 0.96);
  box-shadow: 0 0 10px rgba(255, 205, 116, 0.24);
}

.compatibility-icon span::after {
  bottom: -9px;
  width: 22px;
  height: 4px;
  border-radius: 999px;
  background: rgba(31, 16, 6, 0.98);
}

.dialog-title {
  text-align: center;
  font-size: clamp(1.02rem, 5vw, 1.42rem);
  font-weight: 900;
  letter-spacing: 0.08em;
}

#selectTitle {
  margin-top: 16px;
}

.dialog-sub {
  margin-top: 10px;
  text-align: center;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.45;
}

.choice-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.difficulty-block {
  margin-top: 14px;
}

.difficulty-title {
  margin-bottom: 10px;
  text-align: center;
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  color: rgba(255, 236, 212, 0.74);
}

.difficulty-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.difficulty-btn {
  position: relative;
  min-height: 46px;
  padding: 0 12px 0 38px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03)),
    linear-gradient(180deg, rgba(30, 14, 42, 0.92), rgba(14, 9, 23, 0.98));
  color: rgba(255, 245, 236, 0.9);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-align: left;
  cursor: pointer;
  box-shadow:
    0 10px 18px rgba(0, 0, 0, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease, color 180ms ease;
}

.difficulty-btn::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 50%;
  width: 14px;
  height: 14px;
  border-radius: 5px;
  transform: translateY(-50%);
  border: 1.5px solid rgba(255, 240, 220, 0.34);
  background: rgba(8, 6, 12, 0.34);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.difficulty-btn::after {
  content: "";
  position: absolute;
  left: 18px;
  top: 50%;
  width: 6px;
  height: 10px;
  border-right: 2px solid rgba(255, 244, 220, 0);
  border-bottom: 2px solid rgba(255, 244, 220, 0);
  transform: translateY(-62%) rotate(42deg);
  transition: border-color 180ms ease;
}

.difficulty-btn:hover,
.difficulty-btn:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow:
    0 14px 22px rgba(0, 0, 0, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
  outline: none;
}

.difficulty-btn.active {
  border-color: rgba(255, 211, 128, 0.55);
  background:
    linear-gradient(180deg, rgba(255, 215, 150, 0.22), rgba(255, 132, 69, 0.1)),
    linear-gradient(180deg, rgba(51, 22, 18, 0.94), rgba(22, 10, 13, 0.98));
  color: #fff7e6;
  box-shadow:
    0 16px 24px rgba(0, 0, 0, 0.24),
    0 0 0 1px rgba(255, 199, 112, 0.1),
    inset 0 1px 0 rgba(255, 243, 208, 0.22);
}

.difficulty-btn.active::before {
  border-color: rgba(255, 223, 153, 0.72);
  background: linear-gradient(180deg, rgba(255, 214, 120, 0.28), rgba(255, 156, 61, 0.18));
}

.difficulty-btn.active::after {
  border-color: rgba(255, 248, 232, 0.92);
}

.choice-card,
.play-btn {
  border: 1px solid rgba(255, 255, 255, 0.12);
  cursor: pointer;
}

.choice-card {
  min-height: 164px;
  padding: 16px 10px 14px;
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04)),
    linear-gradient(180deg, rgba(31, 16, 43, 0.9), rgba(15, 10, 23, 0.96));
  box-shadow:
    0 18px 28px rgba(0, 0, 0, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  display: grid;
  justify-items: center;
  align-content: center;
  gap: 16px;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.choice-card:hover,
.choice-card:focus-visible,
.play-btn:hover,
.play-btn:focus-visible {
  transform: translateY(-3px);
  box-shadow:
    0 22px 34px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.22);
  outline: none;
}

.choice-label {
  font-size: 0.9rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.choice-icon {
  position: relative;
  width: 94px;
  height: 94px;
  display: block;
}

.tetris-icon {
  border-radius: 22px;
  background:
    radial-gradient(circle at 18% 18%, rgba(255, 255, 255, 0.22), transparent 30%),
    linear-gradient(180deg, #2f72ba, #163a71);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 14px 28px rgba(8, 18, 37, 0.34);
  overflow: hidden;
}

.tetris-icon::before {
  content: "";
  position: absolute;
  inset: 8px;
  border-radius: 16px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.22) 2px, transparent 2px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.22) 2px, transparent 2px);
  background-size: 20px 20px;
  opacity: 0.42;
}

.tetris-icon::after {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 14px;
  border: 2px solid rgba(220, 244, 255, 0.42);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.tetris-icon span {
  position: absolute;
  width: 24px;
  height: 24px;
  border-radius: 8px;
  background: linear-gradient(180deg, #a8d8ff, #5aa4f4);
  border: 1px solid rgba(232, 247, 255, 0.42);
  box-shadow:
    0 8px 16px rgba(0, 0, 0, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.34);
}

.tetris-icon span::before {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 5px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  opacity: 0.72;
}

.tetris-icon span::after {
  content: "";
  position: absolute;
  left: 5px;
  right: 5px;
  top: 11px;
  height: 2px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 -6px 0 rgba(255, 255, 255, 0.24);
}

.tetris-icon span:nth-child(1) { left: 20px; top: 20px; }
.tetris-icon span:nth-child(2) { left: 44px; top: 20px; }
.tetris-icon span:nth-child(3) { left: 20px; top: 44px; }
.tetris-icon span:nth-child(4) { left: 20px; top: 68px; }

.breakout-icon .paddle {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 16px;
  height: 20px;
  border-radius: 8px;
  background: linear-gradient(180deg, #ffd85a, #e6ae19);
  border: 2px solid rgba(57, 42, 10, 0.72);
  box-shadow:
    0 10px 18px rgba(99, 72, 6, 0.26),
    inset 0 1px 0 rgba(255, 249, 204, 0.42);
}

.breakout-icon .paddle::before {
  content: "";
  position: absolute;
  inset: 2px 6px 2px 6px;
  border-radius: 5px;
  background:
    repeating-linear-gradient(
      -55deg,
      rgba(36, 28, 11, 0.94) 0 9px,
      rgba(36, 28, 11, 0) 9px 18px
    );
  opacity: 0.94;
}

.breakout-icon .paddle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: -8px;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  transform: translateX(-50%);
  background: radial-gradient(circle, #fff6ca 0%, #ffd86f 55%, #f1a918 100%);
  box-shadow: 0 0 12px rgba(255, 193, 50, 0.45);
}

.breakout-icon .ball {
  position: absolute;
  width: 22px;
  height: 22px;
  top: 18px;
  right: 20px;
  border-radius: 999px;
  background: radial-gradient(circle at 35% 35%, #ffffff 0%, #f4fdff 34%, #73d8ff 72%, rgba(115, 216, 255, 0.2) 100%);
  box-shadow: 0 0 16px rgba(119, 221, 255, 0.5);
}

.breakout-icon .ball::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 34px;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(129, 240, 255, 0), rgba(129, 240, 255, 0.7));
  filter: blur(2px);
}

.play-btn {
  width: 100%;
  margin-top: 16px;
  padding: 13px 14px;
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255, 160, 190, 0.92), rgba(178, 67, 115, 0.98));
  box-shadow:
    0 18px 26px rgba(0, 0, 0, 0.24),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  font-size: 0.86rem;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.result-dialog {
  text-align: center;
}

.phone-icon {
  display: grid;
  place-items: center;
  margin-bottom: 12px;
}

.phone-icon span {
  width: 54px;
  height: 86px;
  border-radius: 18px;
  border: 2px solid rgba(255, 255, 255, 0.54);
  position: relative;
}

.phone-icon span::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 8px;
  width: 16px;
  height: 3px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.44);
  transform: translateX(-50%);
}

@keyframes float {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(0, 24px, 0) scale(1.04); }
}

@media (max-width: 520px) {
  .chip-right {
    right: 134px;
  }

  .hud-actions {
    right: 12px;
    gap: 8px;
  }

  .camera-btn,
  .restart-btn {
    height: 34px;
  }

  .camera-label {
    font-size: 0.58rem;
  }

  .restart-btn {
    width: 34px;
  }
}