* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: 20px;
}

.card {
  background: white;
  border-radius: 20px;
  padding: 40px;
  max-width: 420px;
  width: 100%;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.qrcode img {
  width: 200px;
  height: auto;
  border-radius: 12px;
  border: 2px solid #e5e7eb;
}

.save-btn {
  display: inline-block;
  margin-top: 12px;
  padding: 8px 20px;
  background: #4f46e5;
  color: white;
  border-radius: 8px;
  text-decoration: none;
  font-size: 14px;
  transition: background 0.2s;
}

.save-btn:hover {
  background: #4338ca;
}

.contact {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: #f9fafb;
  border-radius: 10px;
  text-decoration: none;
  color: #374151;
  font-size: 15px;
  transition: background 0.2s;
  cursor: pointer;
}

.contact-item:hover {
  background: #eef2ff;
}

.icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.copy-hint {
  margin-left: auto;
  font-size: 12px;
  color: #9ca3af;
}

.toast {
  position: fixed;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #1f2937;
  color: white;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}