:root {
  --bg-main: #050507;
  --bg-panel: rgba(8, 8, 14, 0.86);
  --text-main: #f7f7ff;
  --text-dim: #a7aed7;
  --blue: #2a7fff;
  --purple: #8a2eff;
  --line: rgba(119, 130, 255, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text-main);
  background: var(--bg-main);
}

#can {
  position: fixed;
  inset: 0;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}

#can > canvas {
  border-radius: 14px;
  border: 1px solid rgba(125, 140, 255, 0.32);
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.45);
  max-width: 100%;
  max-height: 100%;
}

#ui {
  width: 100vw;
  height: 100vh;
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
}

#ui-top {
  position: absolute;
  top: 16px;
  left: 12px;
  right: 12px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  pointer-events: none;
}

#ui-booster {
  pointer-events: auto;
  --booster-max: 20;
  --booster-count: 0;
  border-radius: 12px;
  margin: 0;
  flex: 1 1 auto;
  min-width: 120px;
  max-width: 440px;
  width: auto;
  height: 58px;
  padding: 8px;
  background: rgba(11, 13, 27, 0.82);
  border: 1px solid var(--line);
  backdrop-filter: blur(6px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.45);
  position: relative;
  overflow: hidden;
}

#ui-booster::before {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  top: 8px;
  bottom: 8px;
  border-radius: 8px;
  background: rgba(7, 10, 21, 0.85);
  border: 1px solid rgba(111, 129, 247, 0.3);
}

#ui-booster::after {
  content: attr(data-count);
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: calc((100% - 16px) * var(--booster-count) / var(--booster-max));
  min-width: 0;
  border-radius: 8px;
  background:
    linear-gradient(180deg, #8e7eff 0%, #2a7fff 100%);
  box-shadow: 0 0 14px rgba(90, 125, 255, 0.28);
  color: rgba(255, 255, 255, 0.92);
  font-family: "Orbitron", sans-serif;
  font-size: 11px;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  overflow: hidden;
}

#ui-score {
  pointer-events: auto;
  position: relative;
  flex: 0 0 auto;
  min-width: 86px;
  height: 52px;
  border-radius: 12px;
  border: 1px solid rgba(130, 145, 255, 0.45);
  background: rgba(10, 12, 24, 0.85);
  color: var(--text-main);
  font-family: "Orbitron", sans-serif;
  font-size: 20px;
  line-height: 52px;
  text-align: center;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.45);
}

#play-alert {
  pointer-events: auto;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(520px, calc(100vw - 24px));
  min-height: 220px;
  padding: 24px;
  box-sizing: border-box;
  border-radius: 16px;
  border: 1px solid rgba(124, 139, 255, 0.45);
  background: rgba(8, 9, 16, 0.9);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 14px;
  text-align: center;
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.55);
}

#play-alert > button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 180px;
  padding: 10px 0;
  margin: 0;
  border-radius: 999px;
  border: 1px solid rgba(168, 189, 255, 0.45);
  background: linear-gradient(95deg, #121225 0%, #16244d 45%, #3a1a67 100%);
  color: #fff;
  font-family: "Orbitron", sans-serif;
  font-size: 14px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: transform 180ms ease, border-color 220ms ease;
}

#play-alert > button:hover {
  transform: translateY(-1px);
  border-color: rgba(183, 165, 255, 0.8);
}

#play-alert > p {
  margin: 0 0 6px;
  width: 100%;
  color: var(--text-main);
  font-size: clamp(1.1rem, 3vw, 1.45rem);
  font-family: "Orbitron", sans-serif;
  letter-spacing: 0.03em;
}

@media (max-width: 640px) {
  #ui-top {
    top: 12px;
    left: 10px;
    right: 10px;
    gap: 8px;
  }

  #ui-score {
    height: 46px;
    line-height: 46px;
    font-size: 18px;
  }

  #ui-booster {
    min-width: 90px;
  }

  #play-alert {
    min-height: 200px;
    padding: 18px;
  }

  #play-alert > button {
    width: 100%;
    max-width: 220px;
  }
}