.navbar, .navbar a {
  text-align: center;
  display: flex;
  justify-content: space-around;
  background-color: greenyellow;
}

.navbar a {
  text-decoration: none;
  text-emphasis: bold;
  color: black;
  font-weight: bold;
  display: block;
}

/* background */
body {
  background-image: url(https://images-cdn.welcomesoftware.com/Zz0zZTliMjQ4MzhlNGExMWViYmJiMjFiZTI2ZWNmN2MzZA==);
  font-family: "Arial";
  background-repeat: no-repeat;
  background-size: cover;
  height: 100%;
}

.body main {
  background-image: url(https://images-cdn.welcomesoftware.com/Zz0zZTliMjQ4MzhlNGExMWViYmJiMjFiZTI2ZWNmN2MzZA==);
  height: 100%;
  background-repeat: no-repeat;
  background-size: cover;
}

/*{
  box-sizing: border-box;
}*/

/* Style inputs */
input[type=text], select, textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #ccc;
  margin-top: 6px;
  margin-bottom: 16px;
  resize: vertical;
}

input[type=submit] {
  background-color: #04AA6D;
  color: white;
  padding: 12px 20px;
  border: none;
  cursor: pointer;
}

input[type=submit]:hover {
  background-color: #45a049;
}

/* Style the container/contact section */
.container {
  border-radius: 5px;
  background-color: #f2f2f2;
  padding: 10px;
}

.button {
  background-color: #4CAF50;
  border: none;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;
}

.buttonB {
  background-color: #d91919;
  border: none;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;
}

/* Create two columns that float next to eachother */
.column {
  float: left;
  width: 50%;
  margin-top: 6px;
  padding: 20px;
}

/* Clear floats after the columns */
.row:after {
  content: "";
  display: table;
  clear: both;
}

@media screen and (max-width: 600px) {
  .column, input[type=submit] {
    width: 100%;
    margin-top: 0;
  }
}

/***** drop down *****/
/* from https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_responsive_navbar_dropdown */
.topnav {
  overflow: hidden;
  background-color: #333;
}

.topnav a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.active {
  background-color: #04AA6D;
  color: white;
}

.topnav .icon {
  display: none;
}

.dropdown {
  float: left;
  overflow: hidden;
}

.dropdown .dropbtn {
  font-size: 17px;    
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

.dropdown-content a {
  float: none;
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.topnav a:hover, .dropdown:hover .dropbtn {
  background-color: #555;
  color: white;
}

.dropdown-content a:hover {
  background-color: #ddd;
  color: black;
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.dropdown:hover .dropdown-content {
  display: block;
}

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child), .dropdown .dropbtn {
    display: none;
  }
  .topnav a.icon {
    float: right;
    display: block;
  }
}
@media screen and (max-width: 600px) {
  .topnav.responsive {position: relative;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
  .topnav.responsive .dropdown {float: none;}
  .topnav.responsive .dropdown-content {
    position: relative;}
  .topnav.responsive .dropdown .dropbtn {
    display: block;
    width: 100%;
    text-align: left;
  }


}
  .banner {
    width: 80%;
    height: 70%;
    top: 15%;
    left: 50px;
    position: absolute;
    }

  .app-text{
    width: 50%;
    float: left;
  }

  .app-text h1{
    font-size: 250%;
    width: 100%;
  position: relative;
  }

  .image {
    width: 50%;
    float: right;
  }
  .image img {
    width: 100%;
    padding-left: 10%;
    padding-top: 10%;
    position: right;
  }

  header img {
    width: 20%;
    position: right;
  }
  body img {
    width: 20%;
    position: right;
  }

* {
    box-sizing: border-box;
    font-family: sans-serif;
  }

  body {
    background-image: url(https://images-cdn.welcomesoftware.com/Zz0zZTliMjQ4MzhlNGExMWViYmJiMjFiZTI2ZWNmN2MzZA==);
    font-family: "Arial";
    background-repeat: no-repeat;
    background-size: cover;
    height: 100%;
  }

  main {
    width: 80%;
    margin: 15px auto 0;
  }
  
  #studentForm input[name="name"] {
    grid-area: name;
  }
  
  #studentForm input[name="age"] {
    grid-area: age;
  }
  
  #studentForm input[name="roll"] {
    grid-area: roll;
  }
  
  #studentForm button {
    grid-area: button;
  }
  
  #studentForm {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto;
    grid-template-areas:
      "name name"
      "age roll"
      "button button";
  }
  
  #studentForm * {
    margin: 7px;
    padding: 7px;
    font-size: 1.1rem;
    border-radius: 10px;
    transition: all 0.3s ease;
  }
  
  #studentForm button {
    outline: none;
    background-color: #6495ed;
    color: white;
    border: 5px solid transparent;
    cursor: pointer;
  }
  
  #studentForm input {
    border: 3px solid #6495ed;
    outline: none;
  }
  
  #studentForm input:focus {
    border: 3px solid #367bfa;
  }
  
  #studentForm button:active {
    border-color: #367bfa;
  }
  
  .students {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    align-items: center;
    border: 2px solid gray;
    background-color: #ebebeb;
    color: #2f2f2f;
    border-radius: 15px;
  }
  
  .students div {
    width: 100%;
    padding: 10px;
    text-align: center;
  }
  
  .students div * {
    margin: 5px;
  }