:root {
  color-scheme: dark;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
}

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #10192b 0%, #0b1220 100%);
  color: #fef8cf;
}

.shell {
  width: min(96vw, 980px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

h1 {
  margin: 0;
  font-size: clamp(1.7rem, 2.2vw, 2.3rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

canvas {
  width: 100%;
  max-width: 960px;
  border: 4px solid #1c2a43;
  border-radius: 18px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  background: #0f1728;
  touch-action: manipulation;
}

.hud {
  width: 100%;
  max-width: 960px;
  display: flex;
  justify-content: space-between;
  padding: 0 0.2rem;
  font-size: 1rem;
  letter-spacing: 0.05em;
}

.hint {
  margin: 0;
  opacity: 0.8;
}