html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue',
    Arial, 'Noto Sans', 'Liberation Sans', sans-serif;
  color: #111827;
}

.page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: radial-gradient(1200px 800px at 20% 10%, #dbeafe 0%, rgba(219, 234, 254, 0) 60%),
    radial-gradient(900px 700px at 90% 30%, #fee2e2 0%, rgba(254, 226, 226, 0) 55%),
    linear-gradient(180deg, #f3f4f6 0%, #eef2ff 100%);
}

.card {
  width: min(420px, 100%);
  background: #ffffff;
  border-radius: 14px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
  padding: 24px 18px;
  display: grid;
  gap: 18px;
  text-align: center;
}

.title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
}

.subtitle {
  font-size: 13px;
  color: #374151;
  line-height: 1.6;
}

.btn-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 18px;
  border-radius: 10px;
  background: #ef4444;
  color: #ffffff;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.btn-link:active {
  transform: translateY(1px);
}

.btn-copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 18px;
  border-radius: 10px;
  background: #111827;
  color: #ffffff;
  border: 0;
  cursor: pointer;
  font-weight: 700;
}

.btn-copy:active {
  transform: translateY(1px);
}

.hint {
  font-size: 12px;
  color: #6b7280;
  line-height: 1.5;
}