* { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: ui-sans-serif, system-ui, sans-serif;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
    }
    .login-container {
      background: white;
      border-radius: 16px;
      padding: 40px;
      width: 100%;
      max-width: 400px;
      box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    }
    h1 {
      color: #667eea;
      font-size: 2rem;
      margin-bottom: 8px;
      text-align: center;
    }
    .subtitle {
      color: #6b7280;
      font-size: 0.95rem;
      text-align: center;
      margin-bottom: 30px;
    }
    .site-badge {
      background: #e0f2fe;
      color: #0369a1;
      padding: 4px 10px;
      border-radius: 12px;
      font-size: 0.85rem;
      font-weight: 500;
    }
    .form-group {
      margin-bottom: 20px;
    }
    label {
      display: block;
      color: #374151;
      font-size: 0.9rem;
      font-weight: 500;
      margin-bottom: 6px;
    }
    input {
      width: 100%;
      padding: 12px 14px;
      border: 2px solid #e5e7eb;
      border-radius: 8px;
      font-size: 1rem;
      transition: border-color 0.2s;
    }
    input:focus {
      outline: none;
      border-color: #667eea;
    }
    .error {
      color: #dc2626;
      font-size: 0.85rem;
      margin-top: 8px;
      display: none;
    }
    .error.visible { display: block; }
    button {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
      border: none;
      border-radius: 8px;
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      transition: transform 0.2s, box-shadow 0.2s;
    }
    button:hover {
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    }
    button:disabled {
      opacity: 0.7;
      cursor: not-allowed;
      transform: none;
    }