body {
  font-family: Arial, sans-serif;
  background: #f0f0f0;
  margin: 0;
  padding: 0;
  opacity: 0;
  animation: fadeIn 0.4s ease-in-out forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

.blo {

  max-width: 1000px;
  margin: 50px auto;
  background: rgba(255, 255, 255, 0.15);

  border-radius: 20px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
  width: 900px;
  background-color: white;
}

.header {
  background: #2f5fa6;
  color: white;
  padding: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 5px;
}

.menu a {
  color: white;
  margin: 0 10px;
  text-decoration: none;
}
@media (max-width:1200px){
    .blo{
      max-width: 970px;
    }
}
@media (max-width:992px){
    .blo{
      max-width: 750px;
    }
}
@media (max-width:768px){
    .blo{
      max-width: none;
    }
}

.section-title {
  display: flex;
  font-size: 28px;
  font-weight: bold;
  margin: 25px 0 10px;
}

.task {
  margin-left: 10px;
  font-size: 18px;
}

.task2 {
  margin-left: 10px;
  font-size: 18px;
  margin-top: -10px;
  
}

button {
  padding: 10px 20px;
  background-color: #2f5fa6;
  color: white;
  border: none;
  border-radius: 20px;
  font-size: 16px;
  cursor: pointer;
  margin-top: 15px;
  margin-left: 10px;
}

button:hover {
  background-color: #1c3f77;
}

.game {
  background: #d9edf7;
  padding: 15px;
  border-radius: 10px;
  margin-top: 30px;
}

.game input {
  padding: 7px;
  margin-right: 10px;
  border-radius: 5px;
  border: 1px solid #aaa;
}

.game p {
  font-size: 17px;
  margin: 10px 0;
}


.video{
  width: 400px;
  margin: 0px 0px 0px 10px;
  border-radius: 10px;
}

.b-1{
  border: 1px solid#ffff;
}


.grid__o{
  display: flex;
}

.grid{
  display: grid;

  grid-template-columns: 200px 200px;
  grid-template-rows: 1fr;
  margin-right: 20px;
  margin-top: 10px;
  margin-left: 10px;
  
}
.grid__item{
  border: 1px solid #000;
  text-align: center;
  padding: 8px;
}

.grid__item1{
  grid-row-start: 1;
  grid-row-end: 1;
  grid-column-start:1;
  grid-column-end:3;
  border: 1px solid #000;
  text-align: center;
  padding: 8px;
}
.grid__item2{

  grid-column-start: 400px;
  grid-column-end: 400px;
  border: 1px solid #000;
  text-align: center;
  padding: 8px;
}
.grid__item3{

  grid-column-start: 400px;
  grid-column-end: 400px;
  border: 1px solid #000;
  text-align: center;
  padding: 8px;
}
.grid__item4{

  grid-column-start: 400px;
  grid-column-end: 400px;
  border: 1px solid #000;
  text-align: center;
  padding: 8px;
}
.grid__item5{

  grid-column-start: 400px;
  grid-column-end: 400px;
  border: 1px solid #000;
  text-align: center;
  padding: 8px;
}
.grid__item6{

  grid-column-start: 400px;
  grid-column-end: 400px;
  border: 1px solid #000;
  text-align: center;
  padding: 8px;
}
.grid__item7{

  grid-column-start: 400px;
  grid-column-end: 400px;
  border: 1px solid #000;
  text-align: center;
  padding: 8px;
}


.img img{
  width: 85px;

}

.text__flex{
  font-size: 20px;
  margin-top: 10px;
}

.flex{
  display: flex;
  justify-content: center;
  align-items: center;
  height: 80px;
}