:root {
      --primary-color: #4361ee;
      --secondary-color: #3a0ca3;
      --success-color: #4cc9f0;
      --error-color: #f72585;
      --text-color: #333;
      --light-gray: #f8f9fa;
      --border-color: #dee2e6;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }
    
    body {
      background-color: #f5f7ff;
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 100vh;
      padding: 20px;
    }
    
    .container {
      background-color: white;
      border-radius: 10px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
      width: 100%;
      max-width: 400px;
      padding: 30px;
    }
    
    h1 {
      color: var(--primary-color);
      text-align: center;
      margin-bottom: 24px;
      font-weight: 600;
    }
    
    .form-group {
      margin-bottom: 20px;
      position: relative;
    }
    
    label {
      display: block;
      margin-bottom: 8px;
      font-weight: 500;
      color: var(--text-color);
    }
    
    input[type="email"],
    input[type="password"] {
      width: 100%;
      padding: 12px 15px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 16px;
      transition: border-color 0.3s;
    }
    
    input[type="email"]:focus,
    input[type="password"]:focus {
      border-color: var(--primary-color);
      outline: none;
      box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
    }
    
    .password-toggle {
      position: absolute;
      right: 12px;
      top: 38px;
      background: none;
      border: none;
      color: #6c757d;
      cursor: pointer;
    }
    
    .options {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      font-size: 14px;
    }
    
    .remember-me {
      display: flex;
      align-items: center;
    }
    
    .remember-me input {
      margin-right: 5px;
    }
    
    button[type="submit"] {
      width: 100%;
      padding: 12px;
      background-color: var(--primary-color);
      color: white;
      border: none;
      border-radius: 6px;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      transition: background-color 0.3s;
    }
    
    button[type="submit"]:hover {
      background-color: var(--secondary-color);
    }
    
    button[type="submit"].loading {
      position: relative;
      color: transparent;
    }
    
    button[type="submit"].loading::after {
      content: "";
      position: absolute;
      width: 20px;
      height: 20px;
      top: 50%;
      left: 50%;
      margin: -10px 0 0 -10px;
      border: 3px solid rgba(255, 255, 255, 0.3);
      border-radius: 50%;
      border-top-color: white;
      animation: spin 1s ease-in-out infinite;
    }
    
    @keyframes spin {
      to { transform: rotate(360deg); }
    }
    
    #loginMessage {
      padding: 12px;
      border-radius: 6px;
      margin-top: 20px;
      text-align: center;
      font-size: 14px;
    }
    
    #loginMessage.success {
      background-color: rgba(76, 201, 240, 0.1);
      color: #0a7ea6;
      border: 1px solid var(--success-color);
    }
    
    #loginMessage.error {
      background-color: rgba(247, 37, 133, 0.1);
      color: var(--error-color);
      border: 1px solid var(--error-color);
    }
    
    .footer {
      text-align: center;
      margin-top: 24px;
      font-size: 14px;
      color: #6c757d;
    }
    
    .footer a {
      color: var(--primary-color);
      text-decoration: none;
    }
    
    .footer a:hover {
      text-decoration: underline;
    }