:root {
  --bg: #050815;
  --panel: #101a33;
  --panel2: #0b1328;
  --line: #2e4f9c;
  --text: #e8f3ff;
  --muted: #9bb8df;
  --gold: #ffe48d;
  --cyan: #6de0ff;
  --pink: #ff7dc7;
  --ok: #7dffbf;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Courier New", Courier, monospace;
  background:
    radial-gradient(circle at 16% -8%, #2d4688, transparent 46%),
    radial-gradient(circle at 85% 115%, #4a1f73, transparent 42%),
    repeating-linear-gradient(
      to bottom,
      rgba(130, 182, 255, 0.06) 0,
      rgba(130, 182, 255, 0.06) 1px,
      transparent 1px,
      transparent 4px
    ),
    var(--bg);
  padding: 20px;
}

.app {
  width: min(980px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

.panel {
  border-radius: 14px;
  border: 1px solid var(--line);
  box-shadow: inset 0 0 0 1px rgba(135, 180, 255, 0.18);
  background: linear-gradient(180deg, var(--panel), var(--panel2));
}

.topbar {
  padding: 16px 18px;
}

.back {
  color: #a9e6ff;
  text-decoration: none;
  font-weight: bold;
}

.topbar h1 {
  margin: 8px 0 4px;
  color: #fff4b5;
  letter-spacing: 0.05em;
}

.topbar p {
  margin: 0;
  color: var(--muted);
}

.hud {
  padding: 12px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr)) auto auto;
  gap: 10px;
  align-items: stretch;
}

.stat {
  border: 1px solid #3359a6;
  border-radius: 10px;
  padding: 10px;
  background: #08142d;
  display: grid;
  gap: 4px;
}

.stat span {
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.stat strong {
  color: var(--gold);
  font-size: 1.18rem;
}

.btn {
  font: inherit;
  border-radius: 9px;
  border: 1px solid #3c63af;
  background: #132755;
  color: var(--text);
  padding: 0 14px;
  cursor: pointer;
  min-height: 44px;
}

.btn:hover { filter: brightness(1.1); }
.btn:active { transform: translateY(1px); }

.btn.primary {
  background: linear-gradient(180deg, #6a62ff, #4542d2);
  border-color: #8f92ff;
}

.arena-wrap {
  position: relative;
  overflow: hidden;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  max-height: 68vh;
  image-rendering: pixelated;
  background: #02060f;
}

.scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.04) 0,
    rgba(255, 255, 255, 0.04) 1px,
    transparent 1px,
    transparent 4px
  );
  pointer-events: none;
}

.overlay {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid #4d73c0;
  background: rgba(8, 15, 35, 0.9);
  color: #d7ebff;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.84rem;
  text-align: center;
}

.overlay.hidden { display: none; }

.help {
  padding: 12px 14px;
}

.help ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  display: grid;
  gap: 4px;
}

.help strong {
  color: #cde7ff;
}

@media (max-width: 920px) {
  body { padding: 12px; }

  .hud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .btn {
    min-height: 42px;
  }
}