* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
  /*background-image: url("image/milkyway.jpg");*/
  background-color: black transparent: ;

}

header {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  height: 125px;
  background-color: rgb(112, 97, 99);
  border-bottom: 10px solid rgb(109, 93, 93);
  padding: 0 20px;
}

.logo {
  margin-left: -10px;
  border-left: 10px;
  border-top: 10px;
}

.nav-container {
  margin-right: -10px;
  flex-grow: 1;
  display: flex;
  justify-content: end;
}

.nav {
  height: 40px;
  background-color: #544649;
  text-align: center;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: bold;
  color: #483f41;
  width: 90%;
  
}



li {
  display: inline-block;
  margin-left: 50px;
}

.nav li {
  display: inline-block;
  text-decoration: none;
  color: white;
}

.nav a:hover {
  color: lightgray;
}

.container {
  background-color: lightgray;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
  main {
    display: flex;
    flex: 1; 
  }

  .left {
    
    flex: 2.5; 
    display: flex;
    flex-direction: column;
  }
  

  
  .row {
    display: flex;
    flex: 1;
  }
  
  .section {
    flex: 1; 
    padding: 10px; 
    box-sizing: border-box; 
  }
  
  .main-content p {
    line-height: 1.6;
  }
  
  .up-left,
  .down-left {
   
    margin-right: 10 px;
    margin-left: 10px;
    border-right: 10px solid #fff;
    border-left: 10px solid #fff;
    border-top: 10px solid #fff;
    border-bottom: 10px solid #fff;
  }
  
  .up-right,
  .down-right {
    background-color: bisque transparent;
    margin-right: 10px;
    margin-left: 10px;
    border-right: 10px solid #fff;
    border-left: 10px solid #fff;
    border-top: 10px solid #fff;
    border-bottom: 10px solid #fff;
    justify-content: flex-end;
  }
  

 
  .up-right {
    flex: 0 0 30px;
    flex-shrink: 0;
  }
  .down-right {
    flex-shrink: 0;
  }
 

  .right {
    flex: 0 0 300px; 
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    height: 430px;
  }
  .left {
    height: 430px;
  }

  .up-left {
    flex: 0 0 50px;
  }
  
  
  .footer {
    
    display: flex;
    min-height: 300px;
    background-color: rgb(86, 85, 85);
  }