html {
  scroll-behavior: smooth;
}
* {
  padding: 0;
  box-sizing: border-box;
}
.shadow__btn {
  padding: 10px 20px;
  border: none;
  font-size: 17px;
  color: #fff;
  border-radius: 7px;
  letter-spacing: 4px;
  font-weight: 700;
  text-transform: uppercase;
  transition: 0.5s;
  transition-property: box-shadow;
}

.shadow__btn {
  background: rgb(208, 255, 0);
  box-shadow: 0 0 25px rgb(142, 163, 48);
}

.shadow__btn:hover {
  box-shadow:
    0 0 5px rgb(178, 212, 23),
    0 0 25px rgb(179, 209, 42),
    0 0 50px rgb(210, 223, 33),
    0 0 100px rgb(205, 240, 10);
  transform: translateY(-5px);
  transition: all 0.3s ease;
}
.btn {
  padding: 10px 20px;
  border: none;
  font-size: 17px;
  color: #fff;
  border-radius: 7px;
  letter-spacing: 4px;
  font-weight: 700;
  text-transform: uppercase;
  transition: 0.5s;
  transition-property: box-shadow;
}
.btn {
  background: transparent;
  border: 2px solid yellow;
}
.btn:hover{
  box-shadow: 
  0 0 5px rgb(178, 212, 23),
  0 0 25px rgb(179, 209, 42), 
  0 0 50px rgb(210, 223, 33),
  0 0 100px rgb(205, 240, 10);
  transform: translateY(-5px);
  transition: all 0.3s ease;
}
nav a {
    text-decoration: none;
    position: relative;
}
nav a::after {
    content: " ";
    width:0%;
    height: 2px;
    background-color: yellow;
    position:absolute;
    bottom:0;
    left:0;
    transition: 0.5s ease-in-out;
}
nav a:hover::after {
    width: 100%;
}
.card{
  position:relative;
}
.card:hover {
  transform: translateY(-5px);
  transition: all 0.3s ease;
}

.reveal {
  opacity:0;
  transform: translateY(40px);
  transition: 0.8s ease;
}

.reveal.active {
  opacity:1;
  transform: translateY(0);
}