:root {
    --primary-color: #0078d4;
    --secondary-color: #106ebe;
    --background-color: #f3f2f1;
    --text-color: #323130;
    --error-color: #a80000;
    --border-color: #8a8886;
  }
  
  body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.5;
    margin: 0;
    padding: 0;
  }
  
  a,
  a:link {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
  }
  
  a:hover,
  a:focus,
  a:focus:hover,
  a:active {
    color: var(--secondary-color);
    text-decoration: underline;
  }
  
  .ext-background-image {
    background-image: url('https://picsum.photos/1920/1080');
    background-size: cover;
    background-position: center;
    filter: blur(5px);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
  }
  
  .ext-header {
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.8);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  }
  
  .ext-header-logo {
    max-height: 40px;
  }
  
  .ext-middle {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 140px);
  }
  
  .ext-vertical-split-main-section {
    display: flex;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  }
  
  .ext-vertical-split-background-image-container {
    flex: 1;
    background-image: url('https://picsum.photos/800/600');
    background-size: cover;
    background-position: center;
  }
  
  .ext-sign-in-box {
    flex: 1;
    background-color: white;
    padding: 40px;
    border-radius: 4px;
  }
  
  .ext-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
  }
  
  .ext-subtitle {
    font-size: 16px;
    color: #605e5c;
    margin-bottom: 24px;
  }
  
  .ext-button {
    padding: 8px 16px;
    border: none;
    border-radius: 2px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
  }
  
  .ext-button.ext-primary {
    background-color: var(--primary-color);
    color: white;
  }
  
  .ext-button.ext-primary:hover,
  .ext-button.ext-primary:focus,
  .ext-button.ext-primary:focus:hover,
  .ext-button.ext-primary:active {
    background-color: var(--secondary-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  }
  
  .ext-button.ext-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
  }
  
  .ext-button.ext-secondary:hover,
  .ext-button.ext-secondary:focus,
  .ext-button.ext-secondary:focus:hover,
  .ext-button.ext-secondary:active {
    background-color: rgba(0, 120, 212, 0.1);
  }
  
  .ext-error {
    color: var(--error-color);
    font-size: 14px;
    margin-top: 8px;
  }
  
  .ext-input.ext-text-box {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 2px;
    font-size: 14px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
  }
  
  .ext-input.ext-text-box.ext-has-error {
    border-color: var(--error-color);
  }
  
  .ext-input.ext-text-box:hover,
  .ext-input.ext-text-box:focus,
  .ext-input.ext-text-box:focus:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 120, 212, 0.2);
  }
  
  .ext-boilerplate-text {
    font-size: 12px;
    color: #605e5c;
    margin-top: 24px;
  }
  
  .ext-promoted-fed-cred-box {
    margin-top: 24px;
    padding: 16px;
    background-color: #f3f2f1;
    border-radius: 2px;
  }
  
  .ext-footer {
    background-color: rgba(255, 255, 255, 0.8);
    padding: 16px;
    text-align: center;
  }
  
  .ext-footer-content {
    font-size: 12px;
  }
  
  .ext-debug-item {
    cursor: pointer;
    color: #605e5c;
    font-size: 12px;
    margin-top: 8px;
  }