:root {
  --bg: #04050a;
  --panel: #0f1324;
  --text: #f2f5ff;
  --accent: #ffe066;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background:
    radial-gradient(1100px 700px at 30% 10%, #142047 0%, transparent 60%),
    radial-gradient(1100px 700px at 70% 90%, #1c112e 0%, transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
}

.app {
  width: min(94vw, 620px);
  padding: 1rem;
  border-radius: 14px;
  background: linear-gradient(180deg, rgb(255 255 255 / 0.04), rgb(255 255 255 / 0.02));
  border: 1px solid rgb(255 255 255 / 0.15);
  box-shadow: 0 24px 48px rgb(0 0 0 / 0.45);
}

h1 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.4rem, 2.2vw, 1.8rem);
  letter-spacing: 0.04em;
  color: var(--accent);
}

.hud {
  display: flex;
  justify-content: space-between;
  margin: 0 0 0.75rem;
  font-size: 0.98rem;
}

.controls {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  margin: 0 0 0.75rem;
  font-size: 0.92rem;
}

#speed-control {
  border-radius: 999px;
  border: 1px solid rgb(255 255 255 / 0.3);
  background: #0f1324;
  color: #f2f5ff;
  padding: 0.25rem 0.65rem;
}

canvas {
  width: 100%;
  height: auto;
  border: 2px solid rgb(255 255 255 / 0.2);
  border-radius: 10px;
  background: #000;
}

#status {
  min-height: 1.25rem;
  margin: 0.8rem 0 0.6rem;
  color: #d7defd;
}

#restart {
  border: 0;
  border-radius: 999px;
  padding: 0.55rem 1rem;
  font-weight: 700;
  cursor: pointer;
  color: #151515;
  background: linear-gradient(180deg, #ffef9f 0%, #ffe066 100%);
}

#restart:hover {
  filter: brightness(1.05);
}