body {
  margin: 0;
  padding: 0;
  border: 0; 
  min-width: 290px;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  background: #444 url("debut_dark.png") repeat;
  color: #666;
  font: normal 100%/1.25 "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-family: Arial, Helvetica, sans-serif;
}

h1 {
  margin: 0;
  padding: 0;
  border: 0; 
  font-size: 2.5em;
  line-height: 1;
  color: #222;
  margin-bottom: .5em;
  width: 100%;
}

h2 {
  margin: 1em 0 .5em;
  padding: 0;
  border: 0; 
  width: 100%;
  font-size: 1.0em;
  color: #222;
}

h3 {
  width: 100%;
  font-size: 1.0em;
  color: #444;
  margin: 1em 0 .5em;
}

p {
  width: 100%;
}

ul {
  margin: 0;
  padding: 0;
  border: 0; 
  list-style-type: none;
  overflow: hidden;
  background-color: #333;
}

li {
  padding: 0;
  border: 0; 
  margin: 0 15px
}

img {
  width: 100%;
}

table, th, td {
  border: 1px solid black;
  border-collapse: collapse;
}

th, td {
  padding: 5px;
}

th {
  text-align: left;
}

.main {
  background: #ffffff;
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
  border-bottom-left-radius: 10px;
  border-bottom-right-radius: 10px;
  min-width: 200px;
  margin-top: 1em;
  margin-left:auto;
  margin-right:auto;
  padding: 3em 3em;
  width:80%; 
}

.btn {
  background-color: #CCC;
  color: black;
  width: 250px;
  height: 70px;
  font-size: 16px;
  cursor: pointer;
  border-radius: 12px;
}

.btn:hover {
  background-color: gray;
  color: white;
}

.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;
}

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

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

.topnav .icon {
  display: none;
}

@media screen and (max-width: 800px) {
  .topnav a:not(:first-child) {display: none;}
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 800px) {
  .topnav.responsive {position: relative;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
}