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

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

.container {
  background: white;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  max-width: 500px;
  width: 100%;
  padding: 40px;
}

h1 {
  color: #333;
  margin-bottom: 10px;
  font-size: 28px;
}

h2 {
  color: #666;
  font-size: 18px;
  font-weight: normal;
  margin-bottom: 30px;
}

.info-box {
  background: #f5f7fa;
  border-left: 4px solid #667eea;
  padding: 20px;
  margin: 20px 0;
  border-radius: 4px;
}

.info-box p {
  margin: 8px 0;
  color: #555;
}

.info-box strong {
  color: #333;
}

form {
  margin-top: 30px;
}

input {
  width: 100%;
  padding: 12px;
  border: 2px solid #e1e8ed;
  border-radius: 6px;
  font-size: 16px;
  margin-bottom: 15px;
  transition: border-color 0.3s;
}

input:focus {
  outline: none;
  border-color: #667eea;
}

input:read-only {
  background: #f5f7fa;
}

button {
  width: 100%;
  padding: 14px;
  background: #667eea;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover {
  background: #5568d3;
}

button:disabled {
  background: #ccc;
  cursor: not-allowed;
}

.error {
  background: #fee;
  color: #c33;
  padding: 12px;
  border-radius: 6px;
  margin-bottom: 20px;
  border-left: 4px solid #c33;
}

.success {
  background: #efe;
  color: #3c3;
  padding: 12px;
  border-radius: 6px;
  margin-bottom: 20px;
  border-left: 4px solid #3c3;
}

.footer {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid #e1e8ed;
  text-align: center;
  color: #999;
  font-size: 14px;
}

.loading {
  text-align: center;
  color: #666;
  padding: 20px;
}

.spinner {
  border: 3px solid #f3f3f3;
  border-top: 3px solid #667eea;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  animation: spin 1s linear infinite;
  margin: 20px auto;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.success-icon {
  font-size: 48px;
  margin-bottom: 20px;
}

.success-message {
  text-align: center;
  padding: 20px 0;
}

.success-message h1 {
  color: #3c3;
  margin-bottom: 10px;
}