:root {
  color-scheme: dark;
  --bg: #04050d;
  --text: #e0f2fe;
  --accent: #7dd3fc;
  --accent-2: #f0abfc;
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  overscroll-behavior: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

body {
  display: grid;
  place-items: center;
  height: 100dvh;
}

#stage {
  position: relative;
  width: min(100vw, calc(100dvh * 9 / 16));
  aspect-ratio: 9 / 16;
  overflow: hidden;
  background: #05060f;
}

#game {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

#stage.playing #game {
  cursor: none;
}

.hud {
  position: absolute;
  inset: 0 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  padding: max(12px, env(safe-area-inset-top)) 14px 0;
  font-size: clamp(14px, 2.4dvh, 20px);
  letter-spacing: 0.05em;
  pointer-events: none;
  text-shadow: 0 0 8px rgb(125 211 252 / 0.6);
}

#lives {
  color: var(--accent);
  letter-spacing: 0.3em;
}

#high-score {
  text-align: right;
  opacity: 0.75;
}

.hud-buttons {
  position: absolute;
  top: calc(max(12px, env(safe-area-inset-top)) + 2.2em);
  right: 14px;
  display: flex;
  gap: 8px;
}

.hud-buttons button {
  padding: 6px 10px;
  font-size: 12px;
  opacity: 0.7;
}

button {
  font: inherit;
  color: var(--text);
  background: rgb(125 211 252 / 0.12);
  border: 1px solid rgb(125 211 252 / 0.5);
  border-radius: 8px;
  cursor: pointer;
}

button:hover,
button:focus-visible {
  background: rgb(125 211 252 / 0.25);
  outline: none;
}

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 24px;
  text-align: center;
  background: rgb(4 5 13 / 0.55);
  backdrop-filter: blur(2px);
  animation: fade-in 0.5s ease-out;
}

.overlay[hidden] {
  display: none;
}

.overlay h1 {
  margin: 0;
  font-size: clamp(28px, 6dvh, 48px);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.overlay p {
  margin: 0;
  max-width: 36ch;
  line-height: 1.6;
  white-space: pre-line;
  opacity: 0.85;
}

.overlay button {
  padding: 12px 32px;
  font-size: 18px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
}