:root {
  --navy: #0c2140;
  --blue: #1d6fe0;
  --cyan: #38bdf8;
  --ink: #16202e;
  --muted: #5b6b80;
  --line: #dbe4f0;
  --bg: #fff;
  --card: #f5f8fc;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
}

.band {
  height: 8px;
  background: linear-gradient(90deg, var(--navy), var(--blue) 60%, var(--cyan));
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 40px 24px 64px;
}

.logo {
  display: block;
  width: 100%;
  max-width: 360px;
  height: auto;
  margin: 0 auto 8px;
}

.tagline {
  text-align: center;
  font-size: 1.1rem;
  color: var(--muted);
  margin: 0 0 32px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px;
  margin-bottom: 20px;
}

h2 {
  font-size: 1.05rem;
  margin: 0 0 12px;
  color: var(--navy);
}

.which { margin: 0 0 20px; color: var(--muted); }

.buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.btn {
  display: block;
  text-align: center;
  text-decoration: none;
  color: #fff;
  background: linear-gradient(135deg, var(--navy), var(--blue));
  border-radius: 10px;
  padding: 14px 12px;
  font-weight: 600;
}

.btn:hover { background: linear-gradient(135deg, var(--blue), var(--cyan)); }
.btn small { display: block; font-weight: 400; opacity: .8; font-size: .82rem; }
.btn.disabled,
.btn.disabled:hover { background: #c7d2e0; color: #4a5a70; cursor: not-allowed; }

ol { margin: 0; padding-left: 1.3em; }
li { margin-bottom: 6px; }

.foot {
  text-align: center;
  font-size: .85rem;
  color: var(--muted);
}

@media (max-width: 480px) {
  .buttons { grid-template-columns: 1fr; }
}