* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
  }

  body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      background-image: url('../assets/img/fondo.jpg');
      background-size: cover;
      background-position: center;
      background-attachment: fixed;
      position: relative;
      padding: 20px;
  }

  body::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(102, 126, 234, 0.55);
      backdrop-filter: blur(3px);
  }

  .login-container {
      position: relative;
      width: 100%;
      max-width: 420px;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-radius: 20px;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
      overflow: hidden;
      animation: slideIn 0.5s ease-out;
  }

  @keyframes slideIn {
      from {
          opacity: 0;
          transform: translateY(-30px);
      }

      to {
          opacity: 1;
          transform: translateY(0);
      }
  }

  .login-header {
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      padding: 40px 30px;
      text-align: center;
      position: relative;
  }

  .admin-btn {
      position: absolute;
      top: 15px;
      right: 15px;
      width: 45px;
      height: 45px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.2);
      border: 2px solid rgba(255, 255, 255, 0.3);
      color: white;
      font-size: 20px;
      cursor: pointer;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: center;
  }

  .admin-btn:hover {
      background: rgba(255, 255, 255, 0.3);
      transform: scale(1.1);
  }

  .login-icon {
      width: 80px;
      height: 80px;
      background: rgba(255, 255, 255, 0.2);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 20px;
      border: 3px solid rgba(255, 255, 255, 0.3);
  }

  .login-icon i {
      font-size: 40px;
      color: white;
  }

  .login-title {
      color: white;
      font-size: 24px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin: 0;
  }

  .login-body {
      padding: 40px 30px;
  }

  .form-group {
      position: relative;
      margin-bottom: 30px;
  }

  .form-group input {
      width: 100%;
      padding: 15px 15px 15px 50px;
      border: 2px solid #e0e0e0;
      border-radius: 10px;
      font-size: 15px;
      transition: all 0.3s ease;
      background: #f8f9fa;
  }

  .form-group input:focus {
      outline: none;
      border-color: #667eea;
      background: white;
      box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
  }

  .form-group i {
      position: absolute;
      left: 18px;
      top: 50%;
      transform: translateY(-50%);
      color: #667eea;
      font-size: 20px;
      transition: all 0.3s ease;
  }

  .form-group input:focus+i {
      color: #764ba2;
  }

  .form-group label {
      position: absolute;
      left: 50px;
      top: 50%;
      transform: translateY(-50%);
      color: #999;
      pointer-events: none;
      transition: all 0.3s ease;
      font-size: 15px;
  }

  .form-group input:focus+i+label,
  .form-group input:not(:placeholder-shown)+i+label {
      top: -10px;
      left: 10px;
      font-size: 12px;
      color: #667eea;
      background: white;
      padding: 0 5px;
  }

  .btn-submit {
      width: 100%;
      padding: 15px;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
      border: none;
      border-radius: 10px;
      font-size: 16px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 1px;
      cursor: pointer;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
  }

  .btn-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
  }

  .btn-submit:active {
      transform: translateY(0);
  }

  /* Responsive */
  @media (max-width: 480px) {
      .login-container {
          max-width: 100%;
      }

      .login-header {
          padding: 30px 20px;
      }

      .login-title {
          font-size: 20px;
      }

      .login-body {
          padding: 30px 20px;
      }

      .admin-btn {
          width: 40px;
          height: 40px;
          font-size: 18px;
      }

      .login-icon {
          width: 70px;
          height: 70px;
      }

      .login-icon i {
          font-size: 35px;
      }
  }

  @media (max-width: 360px) {
      body {
          padding: 15px;
      }

      .login-title {
          font-size: 18px;
      }

      .form-group input {
          padding: 12px 12px 12px 45px;
          font-size: 14px;
      }

      .btn-submit {
          padding: 12px;
          font-size: 14px;
      }
  }

  /* Animación de carga */
  .btn-submit.loading {
      pointer-events: none;
      opacity: 0.7;
  }

  .btn-submit.loading::after {
      content: '';
      width: 20px;
      height: 20px;
      border: 3px solid rgba(255, 255, 255, 0.3);
      border-top-color: white;
      border-radius: 50%;
      animation: spin 0.8s linear infinite;
  }

  @keyframes spin {
      to {
          transform: rotate(360deg);
      }
  }