*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body{
  height: 100%;
}

html{
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

body{
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 768px;
}

.header{
  height: 100px;
  width: 100%;
  display: flex;
  flex-direction: row;
  align-items: center;
}

#webtitle{
  font-size: 24px;
  color: black;
}

.maintitle{
  display: flex;
  flex-direction: column;
}

.header-nav{
  display: flex;
  flex-direction: row;
  margin-left: 24px;
}

.header-nav li{
  list-style: none;
  margin-left: 8px;
  cursor: pointer;
}

.header-nav li:hover {
  color: rgb(109, 109, 109);
}

.content{
  width: 100%;
  height: 100%;
  position: relative;
}

.countdown-wrapper{
  position: absolute;
  bottom: 128px;
  left: 0px;
  font-size: 16px;
}

#countdown{
  font-size: 26px;
}

ol {
  list-style-position: inside;
}

@media  screen and (min-width: 1580px) {
  body {
    width: 1600px;
  } 

  .header-nav {
    margin-left: 64px;
  }

  #countdown{
    font-size: 36px;
  }
}