* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  background: #f4f5f7;
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  padding: 40px;
  width: 100%;
  max-width: 420px;
}

h1 {
  font-size: 20px;
  margin: 0 0 16px;
  text-align: center;
  color: #1a1a1a;
}

p {
  font-size: 14px;
  color: #444;
  line-height: 1.6;
}

.badge {
  display: inline-block;
  background: #eef2ff;
  color: #4a5dfc;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.link-btn {
  display: block;
  text-align: center;
  margin-top: 20px;
  padding: 11px;
  background: #4a7dfc;
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
}

.link-btn:hover {
  background: #3a6ae0;
}

.link-btn.secondary {
  background: #eee;
  color: #333;
}

.link-btn.secondary:hover {
  background: #ddd;
}

.msg {
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 13px;
  margin-bottom: 16px;
}

.msg.success {
  background: #e6f4ea;
  color: #1e7e34;
}

code {
  background: #f0f1f4;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
}