style.css

body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    min-height: 100vh;

  }

  .box{
    display: flex;
    justify-content: center;
    align-items: center;
    align-content: center;
    margin: 10px;
    padding: 10px;
  
  }
  
  img{
    max-width: 30px;
    max-height: 30px;
    margin-left: 10px;
    
  }

/* Google font */
@import url('https://fonts.googleapis.com/css?family=Orbitron');

#clock {
  font-family: 'Orbitron', sans-serif;
  font-size: 56px;
  text-align: center;
  color: hsla(162, 93%, 72%, 0.87) ;

}
p{
    font-family: 'Montserrat', sans-serif;   
    color: #66d4ff;
    font-size: 20px;
}

.wrapper{
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
          min-height: 100vh;

}
button{
  font-family: 'Montserrat', sans-serif;
  font-size: 15px;
  color: #66ff99;
  background-color: black;
  border:none;
  border-radius: 10px;
  padding: 10px;
}
select{
  background-color: white;
  border-radius: 10px;
  width: 100px;
  margin-right: 10px;
  font-family: 'Montserrat', sans-serif;
  text-align: center;
  padding: 10px;
}
a{
  font-family: 'Montserrat', sans-serif;
  font-size: 15px;
  font-weight: 400;
  text-align: center;
  color: hsla(162, 93%, 72%, 0.87);
  text-decoration: none;
  bottom: 10px;
  position: absolute;
}
a:hover{
  font-family: 'Montserrat', sans-serif;
  font-size: 20px;
  font-weight: 400;
  text-align: center;
  color: white;
  transition: ease-in 1s;
  
}
h1{
  font-family: 'Montserrat', sans-serif;
  font-size: 20px;
  font-weight: 400;
  text-align: center;
  color: hsla(162, 93%, 72%, 0.87);
  
}
#good{
  margin: 0px;
  font-size: 40px;
  color: white;
  font-family: 'Montserrat', sans-serif;
  font-weight: 400;
  text-align: center;
  
  
}

.bar {
  border: none;
  margin: 0.25em; 
  border-radius: 2.75px;
  background-color: white;
  box-shadow: 0 4px 8px 0 hsla(162, 93%, 72%, 0.87), 0 6px 20px 0 hsla(162, 93%, 72%, 0.87);
  width: 200px;
  
}

.bar .progress {
  background: hsla(162, 93%, 72%, 0.87);
  height: 1em;
}
  
@media (max-width: 500px){
  #good{
    font-size: 20px;
  }
  #clock{
    font-size: 20px;
  }
  h1{
    font-size: 15px;
  }
  img{
    max-width: 25px;
    min-width: 25px;
  }

  
}