@import url(sanitize.css);
@import url('https://fonts.googleapis.com/css2?family=Roboto&display=swap');

body{
  background-color: #f0f0f0;
  color: #666;
  padding: 10px;
  font-size: 25px;
}

.main {
  /*overflow: auto;*/
}

.container{
  max-width: 900px;
  margin: 0 auto;
  box-shadow: 0 0 10px rgba(0, 0, 0, .3);
}

header{
  background-color: #a4cef5;
  padding: 20px;
  color: rgb(65, 62, 62);
}

header h1{
  margin: 0;
  font-size: 75px;
  font-family: 'Roboto', sans-serif;
  text-align: center;
  width: 100%;
}

.clock-stl{
  text-align: center;
  background-color: #444;
  color: #fff;
}

.clock-stl .clock-stl{
  font-size: 40px;
}

.link-button{
  background-color: #fff;
  padding: 20px;
}

.link-button button{
    display: block;
    font-size: 30px;
    font-weight: normal;
    color: #fff;
    text-align: center;
    width: 300px;
    padding: 15px;
    border: 1px solid #68779a;
    border-radius: 7px;
    background: #2096f3;
    box-shadow: 0 0 8px rgba(0, 0, 0, .3);
    margin: 20px auto;
    transition: opacity 0.2s ease 0s;
}

.link-button button:hover{
  opacity: .7;
}

.link-button button:active{
  opacity: .7;
}

.headder {
  position: fixed;
  top: 0;
  width: 100%;
  height: 50px;
  background-color: lightblue;
}

footer {
  text-align: center;
  font-size: 80%;
}


@media only screen  and (max-width: 600px){
  header{
    padding: 15px;
  }
  header h1{
    font-size: 50px;
  }

  .clock-stl .clock-stl{
    font-size: 30px;
  }
}