* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: #ffffff;
  color: #111111;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.card {
  max-width: 420px;
  margin: 0 auto;
  padding: 48px 20px 64px;
  text-align: center;
}
h1 {
  font-size: 28px;
  font-weight: 700;
  margin: 8px 0 4px;
}
#tagline {
  margin: 0 0 28px;
  color: #555;
  font-size: 15px;
  min-height: 1px;
}
#tagline:empty { margin-bottom: 24px; }
.btn {
  display: block;
  width: 100%;
  padding: 14px 18px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 12px;
  border: 1px solid #111;
  background: #fff;
  color: #111;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  margin-bottom: 12px;
  transition: transform 0.05s ease, background 0.15s ease, color 0.15s ease;
  font-family: inherit;
}
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: #111;
  color: #fff;
  margin-bottom: 24px;
}
.btn-primary:hover { background: #000; }
.btn:not(.btn-primary):hover { background: #f4f4f4; }
.links { display: flex; flex-direction: column; }