:root {
  --bg-top: #050505;
  --bg-bottom: #111111;
  --panel: rgba(18, 18, 18, 0.86);
  --panel-border: rgba(255, 255, 255, 0.12);
  --text: #f4f4f4;
  --muted: #aaaaaa;
  --accent: #ffffff;
  --danger: #e8e8e8;
  --meter-bg: rgba(255, 255, 255, 0.1);
  --shadow: rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "BIZ UDPGothic", "Meiryo", "Hiragino Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.08), transparent 30%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent);
}

.sound-modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(0, 0, 0, 0.62);
  backdrop-filter: blur(4px);
}

.sound-modal[hidden] {
  display: none;
}

.sound-modal-panel {
  width: min(100%, 360px);
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 16px;
  background: rgba(12, 12, 12, 0.96);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

.sound-modal-title {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 1rem;
  font-weight: 700;
}

.sound-modal-text {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.sound-modal-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 14px;
}

.sound-modal-button {
  min-height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02)),
    rgba(16, 16, 16, 0.96);
  color: var(--text);
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

.sound-modal-button:active {
  transform: translateY(1px);
}

.layout {
  width: min(760px, calc(100% - 16px));
  margin: 0 auto;
  padding: 8px 0 10px;
}

.hero {
  margin-bottom: 8px;
}

.hero-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sound-switch {
  display: inline-flex;
  gap: 4px;
}

.sound-button {
  min-width: 72px;
  min-height: 28px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(16, 16, 16, 0.9);
  color: var(--muted);
  font: inherit;
  font-size: 0.68rem;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

.sound-button.is-active {
  background: #f2f2f2;
  color: #050505;
}

.locale-switch {
  display: inline-flex;
  gap: 4px;
}

.locale-button {
  min-width: 44px;
  min-height: 28px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(16, 16, 16, 0.9);
  color: var(--muted);
  font: inherit;
  font-size: 0.72rem;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

.locale-button.is-active {
  background: #f2f2f2;
  color: #050505;
}

.eyebrow {
  margin: 0 0 2px;
  color: var(--muted);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.5rem, 3.8vw, 2.4rem);
  line-height: 1;
  letter-spacing: 0.03em;
}

.lead {
  max-width: 24rem;
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.4;
}

.hud {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 6px;
  margin-bottom: 8px;
}

.panel {
  padding: 8px 10px;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--panel);
  box-shadow: 0 10px 22px var(--shadow);
}

.label {
  display: block;
  margin-bottom: 3px;
  color: var(--muted);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

#score {
  display: block;
  font-size: 1.25rem;
  font-variant-numeric: tabular-nums;
}

.sub-status {
  min-height: 1.2em;
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.66rem;
  line-height: 1.2;
  white-space: nowrap;
}

.meter {
  overflow: hidden;
  height: 10px;
  border-radius: 999px;
  background: var(--meter-bg);
}

.meter-fill {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #7a7a7a, #ffffff);
  box-shadow: 0 0 18px rgba(255, 255, 255, 0.22);
  transition: width 120ms linear;
}

.game-shell {
  margin-bottom: 8px;
}

.frame {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent),
    rgba(8, 8, 8, 0.96);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.04),
    0 12px 28px rgba(0, 0, 0, 0.38);
}

#game {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  filter: grayscale(1) contrast(1.05);
}

.message {
  position: absolute;
  inset: auto 10px 10px auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 220px;
  padding: 8px 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  background: rgba(12, 12, 12, 0.92);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.28);
}

.message[hidden] {
  display: none;
}

.message-title {
  margin: 0 0 2px;
  color: var(--accent);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.message-text {
  margin: 0;
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.3;
}

.controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
  margin-bottom: 8px;
}

.share-panel[hidden] {
  display: none;
}

.share-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.share-preview {
  margin: 0;
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.4;
  white-space: pre-line;
  word-break: break-word;
}

.share-feedback {
  margin: 0;
  color: var(--text);
  font-size: 0.66rem;
  line-height: 1.3;
}

.share-feedback[hidden] {
  display: none;
}

.share-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
}

.share-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 38px;
  padding: 0 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02)),
    rgba(20, 20, 20, 0.94);
  color: var(--text);
  font: inherit;
  font-size: 0.74rem;
  text-decoration: none;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

.share-action:active {
  transform: translateY(1px);
}

.control-button {
  min-height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)),
    rgba(16, 16, 16, 0.92);
  color: var(--text);
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

.control-button.is-ready {
  border-color: rgba(255, 255, 255, 0.72);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.14) inset,
    0 0 16px rgba(255, 255, 255, 0.24);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.06)),
    rgba(18, 18, 18, 0.96);
  color: #ffffff;
}

.control-button:active {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.03)),
    rgba(28, 28, 28, 0.96);
  transform: translateY(1px);
}

.tips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  color: var(--muted);
  font-size: 0.72rem;
}

.tips p {
  margin: 0;
}

.credit-line {
  margin: 8px 0 0;
  color: #7c7c7c;
  font-size: 0.64rem;
  line-height: 1.4;
  text-align: right;
}

@media (max-width: 720px) {
  .layout {
    width: min(100% - 12px, 760px);
    padding-top: 8px;
  }

  .hero-top {
    align-items: flex-start;
  }

  .hero-actions {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .hud {
    grid-template-columns: 1fr;
  }

  .frame {
    border-radius: 12px;
  }

  .message {
    inset: 6px 6px auto 6px;
    max-width: none;
    max-height: calc(100% - 12px);
    overflow-y: auto;
  }

  .share-preview {
    font-size: 0.74rem;
  }

  .share-feedback {
    font-size: 0.72rem;
  }

  .share-action {
    min-height: 42px;
    font-size: 0.8rem;
  }

  .controls {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .control-button {
    min-height: 48px;
    font-size: 0.9rem;
  }

  .tips {
    font-size: 0.68rem;
  }
}