:root {
  color-scheme: light;
  --bg-top: #0f1b2d;
  --bg-mid: #1c263b;
  --bg-bottom: #0c101a;
  --accent: #f5d36a;
  --accent-soft: rgba(245, 211, 106, 0.25);
  --line: rgba(255, 255, 255, 0.2);
  --glow: rgba(108, 197, 255, 0.35);
  --ink: #f2f5fb;
  --muted: rgba(242, 245, 251, 0.7);
}

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

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 15% 15%, var(--glow), transparent 45%),
    radial-gradient(circle at 85% 20%, rgba(245, 211, 106, 0.2), transparent 40%),
    linear-gradient(180deg, var(--bg-top), var(--bg-mid) 55%, var(--bg-bottom));
  color: var(--ink);
  font-family: "Courier New", "Lucida Console", monospace;
  letter-spacing: 0.04em;
}

.shell {
  width: min(96vw, 1100px);
  padding: 24px 24px 32px;
  border-radius: 18px;
  background: rgba(15, 20, 32, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  display: grid;
  gap: 16px;
}

.hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-transform: uppercase;
  font-size: 14px;
}

.title {
  font-size: 18px;
  color: var(--accent);
  letter-spacing: 0.35em;
}

.scoreboard {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 28px;
  font-weight: 700;
}

.divider {
  color: var(--muted);
}

.arena {
  position: relative;
  width: 100%;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.08));
  aspect-ratio: 5 / 3;
}

canvas {
  width: 100%;
  height: 100%;
  display: block;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 2px, transparent 2px) center/60px 100%,
    radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.08), transparent 65%);
  touch-action: none;
}

.menu {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(6, 10, 20, 0.75);
  backdrop-filter: blur(6px);
  transition: opacity 0.3s ease;
  z-index: 2;
}

.menu.hidden {
  opacity: 0;
  pointer-events: none;
}

.menu-card {
  width: min(92%, 420px);
  padding: 26px;
  border-radius: 18px;
  background: rgba(18, 24, 40, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  display: grid;
  gap: 18px;
  text-align: center;
}

.menu-title {
  font-size: 22px;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-transform: uppercase;
}

.menu-section {
  display: grid;
  gap: 10px;
}

.menu-label {
  font-size: 12px;
  text-transform: uppercase;
  color: var(--muted);
}

.menu-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 10px;
}

.menu-option {
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink);
  font-size: 12px;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.menu-option:hover {
  transform: translateY(-1px);
}

.menu-option.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.toggles {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: center;
}

.toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 12px;
  text-transform: uppercase;
  color: var(--muted);
}

.toggle input {
  accent-color: var(--accent);
}

.menu-start {
  padding: 12px 18px;
  border-radius: 12px;
  border: none;
  background: var(--accent);
  color: #1a1c23;
  font-weight: 700;
  text-transform: uppercase;
  cursor: pointer;
  letter-spacing: 0.1em;
}

.menu-help {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.4;
}

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: rgba(5, 8, 16, 0.4);
  text-align: center;
  color: var(--ink);
  backdrop-filter: blur(2px);
  transition: opacity 0.25s ease;
  z-index: 1;
}

.overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.overlay-title {
  font-size: 20px;
  color: var(--accent);
}

.overlay-sub {
  font-size: 12px;
  color: var(--muted);
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
}

@media (max-width: 720px) {
  .shell {
    padding: 18px;
  }

  .hud {
    flex-direction: column;
    gap: 8px;
  }

  .scoreboard {
    font-size: 22px;
  }

  .overlay-title {
    font-size: 18px;
  }

  .overlay-sub {
    font-size: 11px;
  }

  .menu-card {
    padding: 20px;
  }

  .menu-title {
    font-size: 18px;
  }
}