body {
  margin: 0;
  height: 100%;
  background: #f1f1f1;
}

ul.navitens {
  display: flex;
  flex-direction: row;
  list-style-type: none;
  margin: 0;
}

p, h1, h2, h3, h4 {
  color: #525252;
}

a {
  text-decoration: none;
}

a.nav-link:link, a.nav-link:visited {
  background-color: #448396;
  color: white;
  padding: 15px;
  text-align: center;
  display: inline-block;
}


a.nav-link:hover, a.nav-link:active {
  background-color: #51a1b9;  
}

a.link {
  color: #599fb4;
}

a.link:hover, a.link:active {
  color: #448396;
}

.navbar {
  background-color: #448396;
  font-family: "Courier New", Courier, monospace;
}

.container {
  font-family: Arial;
  padding: 20px;
}

/* Create two unequal columns that floats next to each other */
/* Left column */
.leftcolumn { 
  float: left;
  width: 75%;
}

/* Right column */
.rightcolumn {
  float: left;
  width: 25%;
  padding-left: 20px;
}

.firstthirdcolumn {
  float: left;
  width: 33%;
}

.secondthirdcolumn {
  float: left;
  width: 33%;
  padding-left: 20px;
}
.thirdthirdcolumn {
  float: left;
  width: 33%;
  padding-left: 20px;
}

.header {
  padding-left: 20px;
}

/* Add a card effect for articles */
.card {
  background-color: white;
  padding: 40px;
  margin-top: 20px;
  border-radius: 20px;
}

/* Clear floats after the columns */
.row {
  display: flex;
  flex-direction: row;
}

/* Footer */
.footer {
  padding: 20px;
  text-align: center;
  background: #ddd;
  margin-top: 20px;
}

/* Responsive layout - when the screen is less than 800px wide, make the two columns stack on top of each other instead of next to each other */
@media screen and (max-width: 800px) {
  .leftcolumn, .rightcolumn { 
    width: 100%;
    padding: 0;
  }
}