*{
     box-sizing: border-box;
}

body {
    font-family: Arial;
    padding: 10px;
    background: blue;
}

.header {
    padding: 20px;
    text-align: center;
    background: lightpink;
}

.header h1 {
    font-size: 50px;
}

.nav {
    overflow: hidden;
    background-color: #333;
}

.nav a {
    float: left;
    display: block;
    color: #f2f2f2;
    padding: 14px 16px;
    text-align: center;
}

.nav a:hover {
    background color: #ddd;
    color: black;
}

.row {
    border: 1px solid black;
    padding: 1px;
    margin: 2px;
}
.leftcolumn {
    float: left;
    width: 75%;
}

.rightcolumn {
    float: right;
    width: 25%;
    background-color: #f1f1f1;
    padding-left: 10px;
}

.footer {
    border: 3px solid #f1f1f1;
}


input[type=text], input[type=password] {
      width: 100%;
      padding: 12px 20px;
      margin: 8px 0;
      display: inline-block;
      border: 1px solid #ccc;
      box-sizing: border-box;
}

 button {
     background-color: black;
     color: white;
     padding: 14px 20px;
     margin: 8px 0;
     border: none;
     cursor: pointer;
     width: 10%;
}

button:hover {
     opacity: 0.8;
}

.cancelbtn {
    width: auto;
    padding: 10px 18px;
    background-color: #f44336;
}

.container {
    padding: 16px;
}