:root {
  color-scheme: dark;
  --arcade-bg: #050816;
  --arcade-panel: rgba(8, 15, 35, 0.92);
  --arcade-accent: #67e8f9;
  --arcade-accent-2: #a78bfa;
  --arcade-warm: #fbbf24;
  --arcade-text: #f8fafc;
  --arcade-muted: #a5b4cf;
  --arcade-border: rgba(255, 255, 255, 0.14);
  font-family: Inter, ui-rounded, "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html, body { min-width: 320px; min-height: 100%; margin: 0; overflow: hidden; background: var(--arcade-bg); }
body { min-height: 100vh; color: var(--arcade-text); }
button { min-height: 44px; color: inherit; font: inherit; cursor: pointer; touch-action: manipulation; }
button:focus-visible { outline: 3px solid var(--arcade-accent); outline-offset: 3px; }
button:disabled { cursor: not-allowed; opacity: .48; }

.arcade-shell {
  position: relative;
  width: 100vw;
  height: 100vh;
  min-height: 280px;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 12%, color-mix(in srgb, var(--arcade-accent) 14%, transparent), transparent 24rem),
    var(--arcade-bg);
  isolation: isolate;
}

#game-canvas {
  display: block;
  width: 100%;
  height: 100%;
  outline: none;
  touch-action: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.arcade-hud {
  position: absolute;
  z-index: 10;
  inset: .55rem .55rem auto;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: .45rem;
  pointer-events: none;
}

.score-group, .control-group { display: flex; gap: .38rem; }
.control-group { pointer-events: auto; }
.hud-pill, .icon-button {
  border: 1px solid var(--arcade-border);
  border-radius: .78rem;
  background: rgba(3, 8, 22, .7);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .18);
  backdrop-filter: blur(10px);
}
.hud-pill { min-width: 4.25rem; padding: .48rem .62rem; }
.hud-pill span, .hud-pill strong { display: block; }
.hud-pill span {
  color: var(--arcade-muted);
  font-size: .56rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.hud-pill strong { margin-top: .08rem; font-size: .91rem; font-variant-numeric: tabular-nums; }
.icon-button {
  min-width: 44px;
  padding: .48rem;
  font-size: .76rem;
  font-weight: 900;
}
.icon-button:hover { border-color: var(--arcade-accent); background: rgba(255,255,255,.12); }

.combo-pill {
  position: absolute;
  z-index: 10;
  top: 4.1rem;
  left: 50%;
  min-width: 5rem;
  padding: .35rem .7rem;
  border: 1px solid color-mix(in srgb, var(--arcade-warm) 50%, transparent);
  border-radius: 999px;
  color: var(--arcade-warm);
  background: rgba(3, 8, 22, .72);
  font-size: .72rem;
  font-weight: 950;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -.5rem);
  transition: opacity 160ms ease, transform 160ms ease;
}
.combo-pill.visible { opacity: 1; transform: translate(-50%, 0); }

.progress-wrap {
  position: absolute;
  z-index: 10;
  right: .7rem;
  bottom: .7rem;
  left: .7rem;
  height: .35rem;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255,255,255,.12);
  pointer-events: none;
}
.progress-bar {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--arcade-accent), var(--arcade-accent-2));
  transition: width 180ms linear;
}
.progress-wrap[hidden] { display: none; }

.arcade-overlay {
  position: absolute;
  z-index: 30;
  inset: 0;
  display: grid;
  overflow-y: auto;
  place-items: center;
  padding: 4.4rem .8rem 1rem;
  background:
    radial-gradient(circle at 50% 24%, color-mix(in srgb, var(--arcade-accent) 17%, transparent), transparent 23rem),
    rgba(2, 6, 18, .82);
  backdrop-filter: blur(8px);
}
.arcade-overlay.hidden { display: none; }

.arcade-panel {
  width: min(100%, 31rem);
  padding: clamp(1rem, 5vw, 1.65rem);
  border: 1px solid var(--arcade-border);
  border-radius: 1.35rem;
  background: var(--arcade-panel);
  box-shadow: 0 30px 80px rgba(0,0,0,.45);
  text-align: center;
}
.game-mark {
  display: grid;
  width: 4.4rem;
  height: 4.4rem;
  margin: 0 auto .7rem;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--arcade-accent) 45%, transparent);
  border-radius: 1.2rem;
  color: #06101e;
  background: linear-gradient(135deg, var(--arcade-accent), var(--arcade-accent-2));
  box-shadow: 0 14px 40px color-mix(in srgb, var(--arcade-accent) 20%, transparent);
  font-size: 2.2rem;
}
.kicker {
  margin: 0;
  color: var(--arcade-accent);
  font-size: .65rem;
  font-weight: 950;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.arcade-panel h1 { margin: .35rem 0 0; font-size: clamp(1.7rem, 8vw, 2.8rem); line-height: 1; }
.screen-copy { max-width: 34rem; margin: .65rem auto; color: var(--arcade-muted); font-size: .82rem; line-height: 1.5; }
.instruction-card {
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: .65rem;
  align-items: center;
  margin: .9rem 0;
  padding: .72rem;
  border: 1px solid var(--arcade-border);
  border-radius: .85rem;
  background: rgba(255,255,255,.04);
  color: var(--arcade-muted);
  font-size: .74rem;
  text-align: left;
}
.instruction-card strong {
  display: grid;
  width: 2.2rem;
  height: 2.2rem;
  place-items: center;
  border-radius: .7rem;
  color: #07111e;
  background: var(--arcade-accent);
  font-size: 1rem;
}
.panel-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: .45rem; margin-top: .85rem; }
.primary-button, .secondary-button {
  padding: .68rem .95rem;
  border-radius: .8rem;
  font-size: .78rem;
  font-weight: 950;
}
.primary-button {
  border: 0;
  color: #06101d;
  background: linear-gradient(135deg, var(--arcade-accent), var(--arcade-accent-2));
  box-shadow: 0 10px 28px color-mix(in srgb, var(--arcade-accent) 17%, transparent);
}
.secondary-button { border: 1px solid var(--arcade-border); background: rgba(255,255,255,.055); }

.skin-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .5rem;
  margin: .9rem 0;
}
.skin-button {
  min-width: 0;
  padding: .55rem .25rem;
  border: 1px solid var(--arcade-border);
  border-radius: .75rem;
  background: rgba(255,255,255,.045);
  font-size: .67rem;
  font-weight: 850;
}
.skin-button span { display: block; width: 2rem; height: 2rem; margin: 0 auto .35rem; border-radius: 50%; box-shadow: inset 0 0 0 3px rgba(255,255,255,.18); }
.skin-button.selected { border-color: var(--arcade-accent); color: var(--arcade-accent); }

.countdown {
  position: absolute;
  z-index: 25;
  inset: 0;
  display: grid;
  place-items: center;
  color: #fff;
  background: rgba(3, 8, 20, .28);
  font-size: clamp(4rem, 20vw, 8rem);
  font-weight: 950;
  text-shadow: 0 0 35px var(--arcade-accent);
  pointer-events: none;
}
.countdown.hidden { display: none; }

.toast {
  position: absolute;
  z-index: 50;
  bottom: 1rem;
  left: 50%;
  max-width: min(88%, 28rem);
  padding: .65rem .85rem;
  border: 1px solid color-mix(in srgb, var(--arcade-accent) 42%, transparent);
  border-radius: 999px;
  color: var(--arcade-text);
  background: rgba(3, 8, 22, .92);
  box-shadow: 0 16px 40px rgba(0,0,0,.35);
  font-size: .7rem;
  font-weight: 900;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, .8rem);
  transition: opacity 170ms ease, transform 170ms ease;
}
.toast.visible { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 430px) {
  .arcade-hud { inset: .4rem .4rem auto; }
  .hud-pill { min-width: 3.5rem; padding: .43rem .48rem; }
  .hud-pill span { font-size: .5rem; }
  .hud-pill strong { font-size: .8rem; }
  .icon-button { min-width: 40px; min-height: 40px; padding: .35rem; }
  .control-label { display: none; }
  .combo-pill { top: 3.65rem; }
}

@media (max-height: 520px) and (orientation: landscape) {
  .arcade-overlay { align-items: start; padding-top: 3.5rem; }
  .arcade-panel { padding: .8rem 1rem; }
  .game-mark { width: 3rem; height: 3rem; margin-bottom: .3rem; font-size: 1.45rem; }
  .arcade-panel h1 { font-size: 1.55rem; }
  .screen-copy { margin: .35rem auto; }
  .instruction-card { margin: .45rem 0; padding: .45rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}