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

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

.container {
  width: 100%;
  max-width: 440px;
}

.register-card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  padding: 40px;
}

.logo {
  text-align: center;
  margin-bottom: 32px;
}

.logo h1 {
  font-size: 28px;
  color: #333;
  margin-bottom: 8px;
}

.logo .subtitle {
  color: #666;
  font-size: 14px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: #333;
  font-size: 14px;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
  transition: border-color 0.3s;
}

.form-group input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.code-input-group {
  display: flex;
  gap: 12px;
}

.code-input-group input {
  flex: 1;
}

.btn-code {
  padding: 12px 20px;
  background: #667eea;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.3s;
}

.btn-code:hover:not(:disabled) {
  background: #5568d3;
}

.btn-code:disabled {
  background: #ccc;
  cursor: not-allowed;
}

.btn-register {
  width: 100%;
  padding: 14px;
  background: #667eea;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
  margin-top: 12px;
}

.btn-register:hover {
  background: #5568d3;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.password-rules {
  background: #f8f9fa;
  border-radius: 6px;
  padding: 12px;
  margin-top: 8px;
}

.rule {
  font-size: 12px;
  color: #999;
  margin: 4px 0;
  transition: color 0.3s;
}

.rule.valid {
  color: #10b981;
}

.rule.invalid {
  color: #ef4444;
}

.error-message {
  color: #ef4444;
  font-size: 12px;
  margin-top: 6px;
  min-height: 18px;
}

.success-message {
  text-align: center;
  padding: 20px;
  background: #d1fae5;
  color: #065f46;
  border-radius: 6px;
  margin-top: 20px;
}

@media (max-width: 480px) {
  .register-card {
    padding: 24px;
  }

  .logo h1 {
    font-size: 24px;
  }
}