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

h1{
  font-family: 'Roboto', sans-serif;
  font-weight: 300;
  font-size: 3em;
  color: #fff;
  text-align: center;
  margin: 0;
  padding: 0;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

p{
  color: white;
  padding: 10px;
  font-size: 19px;
}

h2{
  font-family: 'Roboto', sans-serif;
  font-weight: 300;
  font-size: 2em;
  color: #fff;
  text-align: left;
  margin: 0;
  padding: 0;
  text-transform: uppercase;

}

h2{
  padding: 10px;
}

html{
  background-color: #15362e;

}

main{
  display: flex;
  gap: 15px;
margin-top: 50px;
  
}



article{
  /* padding: 20px; */
  display: flex;
  gap: 15px;

}

#clock{
  display: none;
  display: block;
}

#countdown {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 15px;
}

#nav_watch{
  font-size: 20px;
  width: auto;
}

#stopwatch{
  display: flex;
}

.button {
  text-align: center;
  text-transform: uppercase;
  cursor: pointer;
  font-size: 20px;
  letter-spacing: 4px;
  position: relative;
  background-color: #224e44;
  border: none;
  color: #fff;
  padding: 20px;
  width: 200px;
  text-align: center;
  transition-duration: 0.1s;
  overflow: hidden;
  /* box-shadow: 0 5px 50px #6d8cab; */
  border-radius: 4px;;
}

.button:hover {
  background: rgb(78, 103, 114);
  color: rgb(255, 255, 255);
}

.button:after {
  content: "";
  background: #1abc9c;
  display: block;
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  transform: scale(0);
  opacity: 0.7;
  /* transition: transform 0.1s ease, opacity 0.2s ease; */
  transition-duration: 0.3s;

}

.button:hover:after {
  transform: scale(1);
  opacity: 0;
}

.content{
  display: none;
}

.pop{
display: none;
}

.button:active:after {
  padding: 0;
  margin: 0;
  opacity: 50%;
  transition: 0s
  
}


.button:focus { 
  outline:0; 
}

.buttonn{
  text-align: center;
  text-transform: uppercase;
  cursor: pointer;
  font-size: 20px;
  letter-spacing: 4px;
  position: relative;
  background-color: #5b8d81;
  border: none;
  color: #fff;
  padding: 10px;
  width: 100px;
  text-align: center;
  transition-duration: 0.1s;
  overflow: hidden;
  /* box-shadow: 0 5px 50px #97a6b5; */
  border-radius: 4px;;
}



.buttonn:hover {
  background: rgb(143, 170, 182);
  /* box-shadow: 1px 1px 10px 10px #1abc9c; */
  color: rgb(255, 255, 255);
}

.buttonn:after {
  content: "";
  /* background: #435a54; */
  display: block;
  position: absolute;
  /* padding-top: 300%;
  padding-left: 350%;
  margin-left: -20px !important;
  margin-top: -120%; */
  transition: transform 0.2s;
  opacity: 0;
  transition: all 0.7s

}

.buttonn:active{
  transform: scale(0.92);
  transition-duration: 0.2;
}

.buttonn:active:after {
  padding: 0;
  margin: 0;
  opacity: 1;
  transition: 0s
}


.buttonn:focus { outline:0; }


input{
  background-color: #3e8977;
  color: white;
  /* box-shadow: 0 5px 15px #d2dae2; */
  margin-left: 0;
  border-radius: 30px;
  padding: 10px;
  font-size: 15px;
  font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
  border-color: white;
}

input:hover{
  background-color: #196f83;
  transition: transform 0.2s;
  border-color: #ffffff;
  transition: all 0.3s  
}

input:active{
  border-color: aqua;
}

.current{
  background-color: #3e8977;
}