:root {
  --bg: #0b0e16;
  --panel: #141a28;
  --line: #5a82b4;
  --you: #46c8ff;
  --bot: #ff5a5a;
  --gold: #ebc83c;
  --text: #dfe3ea;
  --muted: #8a93a6;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  -webkit-user-select: none;
  user-select: none;
}

#app {
  max-width: 880px;
  margin: 0 auto;
  padding: 18px 16px 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 4px 0 12px;
  text-align: center;
}
.sub { color: var(--muted); font-size: 0.9rem; font-weight: 400; }

#scoreboard {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
.score { display: flex; align-items: center; gap: 10px; }
.score.you { color: var(--you); }
.score.bot { color: var(--bot); }
.score .label { font-size: 0.75rem; letter-spacing: 0.15em; color: var(--muted); }
.vs { color: var(--muted); }

canvas {
  width: 100%;
  max-width: 840px;
  aspect-ratio: 2 / 1;
  background: #16243a;
  border-radius: 10px;
  border: 1px solid #24344e;
  touch-action: none;
  cursor: none;
}

#controls {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-top: 14px;
}
#controls label { color: var(--muted); font-size: 0.9rem; display: flex; gap: 6px; align-items: center; }
#controls select {
  background: var(--panel); color: var(--text);
  border: 1px solid #2a3650; border-radius: 6px; padding: 4px 8px;
}
.checkbox { cursor: pointer; }
button {
  background: var(--panel); color: var(--text);
  border: 1px solid #2a3650; border-radius: 6px;
  padding: 6px 14px; cursor: pointer; font-size: 0.9rem;
}
button:hover { border-color: var(--line); }

.hint { color: var(--muted); font-size: 0.85rem; margin: 14px 0 4px; text-align: center; }
footer { color: var(--muted); font-size: 0.78rem; text-align: center; max-width: 540px; }
footer a, .hint a { color: var(--you); }

#overlay {
  position: fixed; inset: 0;
  background: rgba(6, 9, 16, 0.82);
  display: flex; align-items: center; justify-content: center;
}
#overlay.hidden { display: none; }
.overlay-card {
  background: var(--panel);
  border: 1px solid #2a3650; border-radius: 12px;
  padding: 32px 40px; text-align: center;
}
.overlay-card h2 { margin: 0 0 18px; font-size: 1.8rem; }
.overlay-card button { padding: 10px 22px; font-size: 1rem; }