:root {
  color-scheme: light;
  --bg: #eaf6ff;
  --panel: #f9fcff;
  --text: #18233a;
  --muted: #3c5a86;
  --line: #b7d8ff;
  --accent: #f05d8a;
  --accent-2: #4e8df5;
  --accent-3: #19b393;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #dff1ff 0%, #d9d7ff 50%, #ffe8f0 100%);
  color: var(--text);
}

.page {
  min-height: 100dvh;
  width: min(960px, 100%);
  margin: 0 auto;
  padding: clamp(12px, 3vw, 24px);
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: clamp(10px, 2.5vw, 18px);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.title {
  margin: 0;
  font-size: clamp(22px, 4vw, 34px);
  letter-spacing: 0.02em;
  color: #17315f;
  text-shadow: 0 2px 0 #ffffff;
}

.scoreboard {
  display: flex;
  gap: clamp(10px, 2vw, 18px);
  font-size: clamp(14px, 2.5vw, 18px);
  color: var(--muted);
}

.scoreboard strong {
  color: var(--accent);
}

.game-panel {
  position: relative;
  background: linear-gradient(180deg, #9ed9ff 0%, #b9e8ff 45%, #fff6c7 100%);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  min-height: min(56dvh, 460px);
  box-shadow: 0 10px 24px rgba(43, 108, 184, 0.18);
}

#game-canvas {
  display: block;
  width: 100%;
  height: min(56dvh, 460px);
  touch-action: manipulation;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 8px;
  background: linear-gradient(180deg, rgba(232, 245, 255, 0.76), rgba(255, 232, 241, 0.76));
  padding: 14px;
}

.overlay.hidden {
  display: none;
}

.overlay-title {
  margin: 0;
  font-size: clamp(20px, 4vw, 28px);
  font-weight: 700;
  color: #1f3e73;
}

.overlay-hint {
  margin: 0;
  color: var(--muted);
  font-size: clamp(13px, 2.3vw, 16px);
}

.controls-help {
  color: var(--muted);
  font-size: clamp(12px, 2.1vw, 15px);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.controls-help p {
  margin: 0;
}

.game-info {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: clamp(10px, 2vw, 14px);
  color: #1c3561;
}

.game-info h2 {
  margin: 0 0 8px;
  font-size: clamp(18px, 3vw, 22px);
}

.game-info p {
  margin: 0;
  font-size: clamp(13px, 2.2vw, 16px);
  line-height: 1.45;
}

.game-info p + p {
  margin-top: 8px;
}