:root {
  color-scheme: light;
  --ink: #263247;
  --muted: #60708c;
  --sky: #7cc7e8;
  --sky-dark: #326d8d;
  --sun: #ffd66b;
  --pink: #f083a7;
  --panel: #ffffff;
  --shadow: 0 12px 28px rgba(38, 72, 96, 0.16);
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 14%, rgba(255, 214, 107, 0.4), transparent 22%),
    linear-gradient(180deg, #dff7ff 0%, #f7fbff 56%, #d7f0ff 100%);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  letter-spacing: 0;
  touch-action: manipulation;
  user-select: none;
}

button {
  border: 0;
  color: inherit;
  font: inherit;
}

a {
  color: inherit;
}

.app {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: 12px;
  min-height: 100svh;
  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));
}

.top-bar,
.status-panel,
.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.eyebrow {
  margin: 0 0 2px;
  color: var(--sky-dark);
  font-size: 1rem;
  font-weight: 850;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 3.5rem);
  line-height: 1;
}

.home-link,
.start-button,
.reset-button,
.chip,
.settings-summary {
  min-height: 46px;
  display: grid;
  place-items: center;
  border: 3px solid rgba(50, 109, 141, 0.2);
  border-radius: 8px;
  padding: 8px 14px;
  background: var(--panel);
  box-shadow: 0 7px 0 rgba(50, 109, 141, 0.13);
  font-weight: 900;
  text-decoration: none;
}

.start-button {
  color: #fff;
  background: var(--sky-dark);
}

.sound-button {
  background: #eef8ff;
}

.status-panel {
  min-height: 88px;
  border: 3px solid rgba(50, 109, 141, 0.18);
  border-radius: 8px;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow);
}

.label,
.big-text,
.question,
.message {
  margin: 0;
  text-align: center;
  font-weight: 900;
}

.label {
  color: var(--muted);
  font-size: 0.9rem;
}

.big-text {
  min-width: 54px;
  font-size: 2rem;
  line-height: 1;
}

.small-text {
  font-size: 1.6rem;
}

.question-box {
  flex: 1;
}

.question {
  font-size: clamp(2.2rem, 7vw, 4rem);
  line-height: 1;
}

.message {
  color: var(--sky-dark);
  font-size: clamp(1rem, 3vw, 1.35rem);
}

.bubble-stage {
  position: relative;
  overflow: hidden;
  min-height: 420px;
  display: grid;
  grid-template-columns: repeat(3, minmax(88px, 1fr));
  align-content: center;
  gap: clamp(12px, 3vw, 24px);
  border: 4px solid rgba(50, 109, 141, 0.2);
  border-radius: 8px;
  padding: clamp(14px, 4vw, 30px);
  background:
    radial-gradient(circle at 18% 20%, rgba(255, 255, 255, 0.8), transparent 13%),
    radial-gradient(circle at 74% 18%, rgba(255, 255, 255, 0.7), transparent 10%),
    linear-gradient(180deg, #bdefff 0%, #edfaff 100%);
  box-shadow: var(--shadow);
}

.bubble {
  width: min(142px, 100%);
  aspect-ratio: 1;
  justify-self: center;
  border: 4px solid rgba(255, 255, 255, 0.82);
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 24%, rgba(255, 255, 255, 0.9) 0 12%, transparent 13%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.82), rgba(124, 199, 232, 0.64));
  box-shadow: 0 12px 24px rgba(50, 109, 141, 0.18);
  color: var(--ink);
  cursor: pointer;
  font-size: clamp(2rem, 7vw, 3.4rem);
  font-weight: 950;
  animation: float 1700ms ease-in-out infinite alternate;
}

.bubble:nth-child(2n) {
  animation-delay: 180ms;
}

.bubble:nth-child(3n) {
  animation-delay: 320ms;
}

.bubble.is-right {
  background:
    radial-gradient(circle at 30% 24%, rgba(255, 255, 255, 0.9) 0 12%, transparent 13%),
    linear-gradient(145deg, #fff4be, var(--sun));
  animation: pop 260ms ease;
}

.bubble.is-wrong {
  background:
    radial-gradient(circle at 30% 24%, rgba(255, 255, 255, 0.9) 0 12%, transparent 13%),
    linear-gradient(145deg, #ffd7e4, var(--pink));
  animation: shake 280ms ease;
}

.controls {
  justify-content: center;
  flex-wrap: wrap;
}

.control-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.settings-panel {
  flex: 1 1 100%;
}

.settings-summary {
  cursor: pointer;
  list-style: none;
}

.settings-summary::-webkit-details-marker {
  display: none;
}

.settings-body {
  display: grid;
  gap: 8px;
  margin-top: 8px;
}

.chip.is-active {
  color: #fff;
  background: var(--sky-dark);
}

@keyframes float {
  from { transform: translateY(0); }
  to { transform: translateY(-10px); }
}

@keyframes pop {
  50% { transform: scale(1.12); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

@media (max-width: 700px) {
  .app {
    gap: 9px;
    padding: 12px;
  }

  .eyebrow {
    display: none;
  }

  h1 {
    font-size: 1.85rem;
  }

  .home-link {
    min-height: 40px;
    padding: 7px 10px;
  }

  .status-panel {
    display: grid;
    grid-template-columns: repeat(3, auto);
    min-height: 0;
    padding: 8px;
  }

  .question-box {
    grid-column: 1 / -1;
    grid-row: 1;
  }

  .question {
    font-size: clamp(2.4rem, 12vw, 3.5rem);
  }

  .big-text {
    font-size: 1.55rem;
  }

  .small-text {
    font-size: 1.25rem;
  }

  .bubble-stage {
    min-height: 48svh;
    grid-template-columns: repeat(3, minmax(70px, 1fr));
    gap: 9px;
    padding: 12px;
  }

  .home-link,
  .start-button,
  .reset-button,
  .chip,
  .settings-summary {
    min-height: 42px;
    padding: 7px 10px;
  }
}