* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: #0a0a0a;
  overflow: hidden;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  touch-action: none; /* prevent scroll/zoom on touch */
  user-select: none;
  -webkit-user-select: none;
}

/* ── Full-viewport canvas ──────────────────────────────────────────────────── */
#game-canvas {
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
}

/* ── HUD ───────────────────────────────────────────────────────────────────── */
#hud {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  z-index: 10;
  pointer-events: none;
  background: linear-gradient(to bottom, rgba(10,10,10,0.7) 0%, transparent 100%);
}

#lives {
  font-size: 1.2rem;
  color: #ff4466;
  letter-spacing: 4px;
}

#score {
  font-size: 1.4rem;
  font-weight: bold;
  color: #00ffee;
  letter-spacing: 2px;
}

/* ── Start screen ──────────────────────────────────────────────────────────── */
#start-screen {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 20;
  gap: 12px;
  pointer-events: none; /* tap falls through to canvas handler */
}

#start-title {
  font-size: 2.8rem;
  letter-spacing: 6px;
  color: #00ffee;
  text-shadow: 0 0 24px #00ffee88;
}

#start-sub {
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: #8888cc;
}

#start-prompt {
  margin-top: 18px;
  font-size: 0.8rem;
  letter-spacing: 3px;
  color: #555588;
  animation: blink 1.2s step-end infinite;
}

/* ── Game-over screen ──────────────────────────────────────────────────────── */
#gameover-screen {
  position: fixed;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 20;
  gap: 12px;
  pointer-events: none;
}

#gameover-title {
  font-size: 2.4rem;
  letter-spacing: 5px;
  color: #ff4466;
  text-shadow: 0 0 20px #ff446688;
}

#final-score {
  font-size: 1.2rem;
  letter-spacing: 3px;
  color: #cccccc;
}

#gameover-prompt {
  margin-top: 16px;
  font-size: 0.8rem;
  letter-spacing: 3px;
  color: #555588;
  animation: blink 1.2s step-end infinite;
}

/* ── Desktop warning ───────────────────────────────────────────────────────── */
/* Hidden by default — shown from JS when screen is wider than a phone */
#desktop-warning {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(10, 10, 10, 0.92);
  z-index: 400;
  align-items: center;
  justify-content: center;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

#desktop-warning.visible {
  display: flex;
}

.desktop-frame {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1rem;
  padding: 2.5rem 2rem;
  width: calc(100% - 48px);
  max-width: 360px;
  background: #111;
  border: 2px solid #00ffee;
  border-radius: 12px;
  box-shadow: 0 0 40px rgba(0, 255, 238, 0.12);
}

.desktop-frame h2 {
  font-size: 1.4rem;
  color: #00ffee;
  letter-spacing: 4px;
  text-shadow: 0 0 16px #00ffee88;
}

.desktop-frame p {
  color: #8888cc;
  font-size: 0.88rem;
  letter-spacing: 1px;
  line-height: 1.6;
}

#warning-dismiss {
  margin-top: 0.5rem;
  padding: 0.5rem 1.4rem;
  font-family: inherit;
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: #0a0a0a;
  background: #00ffee;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  text-transform: uppercase;
  font-weight: bold;
  transition: opacity 0.15s;
}

#warning-dismiss:hover {
  opacity: 0.85;
}

.desktop-frame a {
  color: #555588;
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 2px;
  transition: color 0.15s;
}

.desktop-frame a:hover {
  color: #00ffee;
}

/* ── Animations ────────────────────────────────────────────────────────────── */
@keyframes blink {
  50% { opacity: 0; }
}