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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #0a1628 0%, #1a2a4a 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.container {
  width: 100%;
  max-width: 480px;
}

.card {
  background: white;
  border-radius: 16px;
  padding: 48px 36px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.logo {
  width: 80px;
  height: 80px;
  background: #25D366;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}

.logo svg {
  width: 40px;
  height: 40px;
  fill: white;
}

h1 {
  font-size: 26px;
  color: #1a1a2e;
  margin-bottom: 8px;
  font-weight: 700;
}

.subtitle {
  color: #666;
  font-size: 15px;
  margin-bottom: 36px;
  line-height: 1.5;
}

.status-box {
  background: #f0f2f5;
  border-radius: 10px;
  padding: 14px 20px;
  margin-bottom: 28px;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s;
}

.status-box.success {
  background: #e8f5e9;
}

.status-box.error {
  background: #fbe9e7;
}

#status-text {
  font-size: 14px;
  color: #555;
  line-height: 1.4;
}

.btn-primary {
  background: #25D366;
  color: white;
  border: none;
  border-radius: 10px;
  padding: 16px 32px;
  font-size: 17px;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: background 0.2s, transform 0.1s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.btn-primary:hover {
  background: #1da851;
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  background: #b0bec5;
  cursor: not-allowed;
  transform: none;
}

.footnote {
  color: #999;
  font-size: 12px;
  margin-top: 28px;
  line-height: 1.5;
}