:root {
  --bg: #0b1020;
  --card: #141b2d;
  --text: #e8edf7;
  --muted: #9aa7bd;
  --accent: #5eead4;
  --border: #243049;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
}
main { max-width: 900px; margin: 0 auto; padding: 2rem 1rem 3rem; }
header h1 { margin: 0 0 0.25rem; font-size: 1.75rem; }
.subtitle { color: var(--muted); margin: 0 0 1.5rem; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}
.row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
button {
  background: var(--accent);
  color: #042f2e;
  border: none;
  border-radius: 8px;
  padding: 0.5rem 0.9rem;
  font-weight: 600;
  cursor: pointer;
}
.muted { color: var(--muted); }
.opp {
  border-top: 1px solid var(--border);
  padding: 0.9rem 0;
}
.opp:first-child { border-top: none; padding-top: 0; }
.score {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 600;
}