:root {
  color-scheme: dark;
  --ink: #f5eed4;
  --muted: #a7b1c2;
  --panel: rgba(13, 24, 40, 0.9);
  --line: rgba(120, 187, 255, 0.34);
  --blue: #66b8ff;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 50% -20%, rgba(45, 110, 172, 0.35), transparent 46rem),
    linear-gradient(180deg, #111b2a, #05080d 72%);
  color: var(--ink);
  font-family: Geneva, Verdana, system-ui, sans-serif;
}

button, select { font: inherit; }

.shell {
  width: min(100%, 74rem);
  min-height: 100vh;
  margin: 0 auto;
  padding: max(0.75rem, env(safe-area-inset-top)) clamp(0.6rem, 2.5vw, 2rem) max(1rem, env(safe-area-inset-bottom));
  display: grid;
  align-content: center;
  gap: 0.8rem;
}

.masthead {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
}

.eyebrow {
  margin: 0 0 0.15rem;
  color: var(--blue);
  font: 700 0.68rem/1.2 ui-monospace, "SFMono-Regular", Consolas, monospace;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font: 700 clamp(1.15rem, 3vw, 1.7rem)/1.1 ui-monospace, "SFMono-Regular", Consolas, monospace;
  letter-spacing: 0.03em;
}

.toolbar { display: flex; gap: 0.45rem; }

.toolbar button,
.touch-controls button {
  border: 1px solid var(--line);
  border-radius: 0.45rem;
  background: var(--panel);
  color: var(--ink);
  box-shadow: inset 0 1px rgba(255,255,255,0.08), 0 0.35rem 1rem rgba(0,0,0,0.26);
  cursor: pointer;
  touch-action: none;
  user-select: none;
}

.toolbar button { padding: 0.48rem 0.7rem; font-size: 0.78rem; }
.toolbar button:hover, .toolbar button:focus-visible, .touch-controls button:focus-visible { border-color: var(--blue); outline: none; }

.stage {
  position: relative;
  overflow: hidden;
  width: min(100%, 64rem, 96vh);
  aspect-ratio: 4 / 3;
  margin: auto;
  border: 1px solid rgba(128, 192, 255, 0.28);
  border-radius: 0.4rem;
  background: #000;
  box-shadow: 0 1.2rem 4rem rgba(0, 0, 0, 0.5), 0 0 3rem rgba(58, 139, 222, 0.12);
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  image-rendering: auto;
  outline: none;
}

#loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  margin: 0;
  padding: 2rem;
  background: #05080d;
  color: var(--muted);
  font: 0.78rem/1.5 ui-monospace, "SFMono-Regular", Consolas, monospace;
  text-align: center;
}

#loading[hidden] { display: none; }

.touch-controls {
  display: none;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: center;
}

.game-prompt {
  min-height: 1.2em;
  margin: -0.1rem 0 0;
  color: #fff4a6;
  font: 700 clamp(0.68rem, 1.7vw, 0.8rem)/1.4 ui-monospace, "SFMono-Regular", Consolas, monospace;
  letter-spacing: 0.025em;
  text-align: center;
}

.level-select {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--muted);
  font: 700 0.72rem/1.2 ui-monospace, "SFMono-Regular", Consolas, monospace;
}

.level-select select {
  width: min(19rem, 70vw);
  padding: 0.42rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 0.45rem;
  background: var(--panel);
  color: var(--ink);
}

.level-select select:focus-visible { border-color: var(--blue); outline: none; }
.level-select select:disabled { cursor: wait; opacity: 0.55; }

.dpad { display: grid; grid-template-columns: repeat(2, minmax(3.6rem, 1fr)); gap: 0.35rem; }
.touch-controls button { min-height: 3.2rem; font-weight: 800; }
.touch-controls button.is-held { border-color: #fff; background: rgba(55, 123, 187, 0.9); }
.touch-controls .action { width: 6.2rem; min-height: 4.4rem; border-radius: 50%; color: #fff6a2; }

.help {
  margin: 0;
  color: var(--muted);
  font-size: clamp(0.7rem, 1.8vw, 0.84rem);
  line-height: 1.45;
  text-align: center;
}

.help strong { color: var(--ink); }

@media (pointer: coarse), (max-width: 700px) {
  .shell { align-content: start; }
  .touch-controls { display: grid; }
  .help { display: none; }
  .game-prompt { font-size: 0.68rem; }
}

@media (max-width: 500px) {
  .masthead { align-items: center; }
  .eyebrow { display: none; }
  .toolbar button { padding-inline: 0.55rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
}