:root {
    --primary-color: #3B82F6;
    --primary-hover: #2563EB;
    --success-color: #10B981;
    --error-color: #EF4444;
    --warning-color: #F59E0B;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --background: #F9FAFB;
    --white: #FFFFFF;
    --border-color: #E5E7EB;
    --border-focus: #3B82F6;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --border-radius: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Inter', -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: 24px;
    line-height: 1.6;
  }
  
  .container {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
  }
  
  .form-wrapper {
    background: var(--white);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
  }
  
  .form-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color) 0%, #8B5CF6 100%);
  }
  
  .header {
    text-align: center;
    margin-bottom: 32px;
  }
  
  .header h1 {
    color: var(--text-primary);
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.2;
  }
  
  .header p {
    color: var(--text-secondary);
    font-size: 16px;
    font-weight: 400;
  }
  
  .lead-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
  }
  
  .form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  
  .form-group label {
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
  }
  
  .form-group input {
    padding: 10px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 13px;
    transition: var(--transition);
    background: var(--white);
    color: var(--text-primary);
  }
  
  .form-group input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
  }
  
  .form-group input::placeholder {
    color: var(--text-secondary);
  }
  
  .phone-container {
    display: flex;
    gap: 12px;
    align-items: flex-start;
  }
  
  .ddd-group {
    flex: 0 0 10px;
  }
  
  .phone-group {
    flex: 1;
  }
  
  .ddd-group input {
    text-align: center;
  }
  
  .error-message {
    color: var(--error-color);
    font-size: 14px;
    font-weight: 500;
    opacity: 0;
    transform: translateY(-4px);
    transition: var(--transition);
  }
  
  .error-message.show {
    opacity: 1;
    transform: translateY(0);
  }
  
  .submit-btn {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: var(--white);
    border: none;
    padding: 14px 24px;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 52px;
    margin-top: 8px;
  }
  
  .submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px -8px var(--primary-color);
  }
  
  .submit-btn:active {
    transform: translateY(0);
  }
  
  .submit-btn:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
  }
  
  .btn-text {
    transition: var(--transition);
  }
  
  .loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: none;
  }
  
  .submit-btn.loading .btn-text {
    opacity: 0;
  }
  
  .submit-btn.loading .loading-spinner {
    display: block;
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  
  .success-message,
  .error-alert {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 32px;
    border-radius: 16px;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.9);
    transition: var(--transition);
  }
  
  .success-message.show,
  .error-alert.show {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
  }
  
  .success-icon,
  .error-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: bold;
    margin-bottom: 16px;
  }
  
  .success-icon {
    background: var(--success-color);
    color: var(--white);
  }
  
  .error-icon {
    background: var(--error-color);
    color: var(--white);
  }
  
  .success-message h3,
  .error-alert h3 {
    color: var(--text-primary);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
  }
  
  .success-message p,
  .error-alert p {
    color: var(--text-secondary);
    font-size: 16px;
  }
  
  .form-group input.error {
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px rgb(239 68 68 / 0.1);
  }
  
  .form-group input.success {
    border-color: var(--success-color);
    box-shadow: 0 0 0 3px rgb(16 185 129 / 0.1);
  }
  
  /* Animações de entrada */
  .form-wrapper {
    animation: slideInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  @keyframes slideInUp {
    from {
      opacity: 0;
      transform: translateY(32px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* Responsividade */
  @media (max-width: 640px) {
    body {
      padding: 16px;
    }
    
    .form-wrapper {
      padding: 24px;
    }
    
    .header h1 {
      font-size: 24px;
    }
    
    .header p {
      font-size: 14px;
    }
    
    .phone-container {
      flex-direction: column;
      gap: 16px;
    }
    
    .ddd-group {
      flex: none;
      width: 100%;
    }
    
    .ddd-group input {
      text-align: left;
    }
  }
  
  @media (min-width: 641px) and (max-width: 1024px) {
    .container {
      max-width: 520px;
    }
    
    .form-wrapper {
      padding: 40px;
    }
  }
  
  @media (min-width: 1025px) {
    .container {
      max-width: 480px;
    }
    
    .form-wrapper {
      padding: 48px;
    }
    
    .header h1 {
      font-size: 32px;
    }
  }