:root {
  --bg: #0f1115;
  --card: #171a21;
  --text: #e7e9ee;
  --muted: #9aa3b2;
  --accent: #4a9eff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid #232733;
}

.brand { color: var(--text); font-weight: 600; text-decoration: none; }
.who { color: var(--muted); margin-right: 12px; }

main { max-width: 880px; margin: 0 auto; padding: 32px 24px; }

.card {
  background: var(--card);
  border: 1px solid #232733;
  border-radius: 12px;
  padding: 24px;
}

.card.center { text-align: center; }
.muted { color: var(--muted); }

button {
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  font-size: 14px;
}