* { 
      margin: 0; 
      padding: 0; 
      box-sizing: border-box; 
      font-family: 'Vazirmatn', Tahoma, Arial, sans-serif;
    }
    body {
      background: linear-gradient(45deg, #4a90e2 0%, #357abf 100%);
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      background-size: 400% 400%;
      animation: gradientBG 15s ease infinite;
      padding: 20px;
    }
    @keyframes gradientBG {
      0% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
      100% { background-position: 0% 50%; }
    }
    .login-container {
      background: rgba(255, 255, 255, 0.95);
      padding: 40px 30px;
      border-radius: 20px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
      width: 100%;
      max-width: 450px;
      text-align: right;
      position: relative;
      backdrop-filter: blur(10px);
    }
    .login-container::before {
      content: '';
      position: absolute;
      top: -10px;
      left: -10px;
      right: -10px;
      bottom: -10px;
      background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0));
      border-radius: 25px;
      z-index: -1;
    }
    .login-container h2 {
      margin-bottom: 30px;
      text-align: center;
      color: #4a90e2;
      font-weight: 700;
      position: relative;
    }
    .login-container h2::after {
      content: '';
      position: absolute;
      bottom: -10px;
      left: 50%;
      transform: translateX(-50%);
      width: 100px;
      height: 4px;
      background: linear-gradient(to right, #4a90e2, #357abf);
      border-radius: 2px;
    }
    .error-message {
      display: none;
      background: rgba(255, 0, 0, 0.1);
      color: #d9534f;
      padding: 12px;
      border-radius: 10px;
      margin-bottom: 20px;
      text-align: center;
      font-weight: bold;
      border: 1px solid rgba(255, 0, 0, 0.2);
    }
    .login-container label {
      display: block;
      margin-bottom: 10px;
      color: #333;
      font-weight: bold;
    }
    .input-group {
      position: relative;
      margin-bottom: 20px;
    }
    .login-container input[type="text"],
    .login-container input[type="password"] {
      width: 100%;
      padding: 15px 20px;
      border: 2px solid #e0e0e0;
      border-radius: 12px;
      font-size: 16px;
      transition: all 0.3s ease;
      background: rgba(255,255,255,0.7);
    }
    .login-container input[type="text"]:focus,
    .login-container input[type="password"]:focus {
      outline: none;
      border-color: #4a90e2;
      box-shadow: 0 0 15px rgba(74, 144, 226, 0.2);
    }
    .login-container input[type="submit"] {
      width: 100%;
      padding: 15px;
      background: linear-gradient(to right, #4a90e2, #357abf);
      border: none;
      color: #fff;
      border-radius: 12px;
      cursor: pointer;
      font-size: 18px;
      font-weight: bold;
      transition: all 0.3s ease;
    }
    .login-container input[type="submit"]:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 20px rgba(74, 144, 226, 0.3);
    }
    .footer {
      text-align: center;
      margin-top: 20px;
      font-size: 14px;
      color: #666;
    }
    @media (max-width: 480px) {
      .login-container {
        padding: 30px 20px;
      }
      .login-container input[type="text"],
      .login-container input[type="password"],
      .login-container input[type="submit"] {
        font-size: 14px;
        padding: 12px 15px;
      }
    }