@font-face {
  font-weight: 300;
  font-family: "Open Sans";
  src: url("fonts/opensanslight.woff") format("woff");
}

@font-face {
  font-weight: 700;
  font-family: "Open Sans";
  src: url("fonts/opensansbold.woff") format("woff");
}

body {
  margin: 0;
  padding: 0;
  background-color: #f5f5f5;
  color: #333333;
  font-size: 22px;
  font-family: "Open Sans", sans-serif;
}

h1 {
  margin: 25px 0;
  text-align: center;
  font-weight: 300;
  font-size: 30px;
}

a {
  position: relative;
  display: inline-block;
  outline: none;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 300;
}

div[class^="effect-"] {
  margin: 0 auto;
  padding: 30px 0;
  width: 400px;
  text-align: center;
}

.effect-1 {
  background-color: #f19f0f;
}

.effect-1 a {
  padding: 6px 0 8px;
  color: #ffffff;
}

.effect-1 a::after {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  height: 4px;
  background-color: rgba(0, 0, 0, 0.1);
  content: "";
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  transform: translateY(10px);
}

.effect-1 a:hover::after {
  opacity: 1;
  transform: translateY(0);
}

.effect-2 {
  background-color: #435a6b;
}

.effect-2 a {
  padding: 0 20px;
  height: 45px;
  color: #ffffff;
  line-height: 45px;
}

.effect-2 a::before,
.effect-2 a::after {
  position: absolute;
  width: 45px;
  height: 2px;
  background-color: #ffffff;
  content: "";
  opacity: 0.2;
  transition: all 0.3s;
}

.effect-2 a::before {
  top: 0;
  left: 0;
  transform: rotate(90deg);
  transform-origin: 0 0;
}

.effect-2 a::after {
  right: 0;
  bottom: 0;
  transform: rotate(90deg);
  transform-origin: 100% 100%;
}

.effect-2 a:hover::before {
  left: 50%;
  opacity: 1;
  transform: rotate(0deg) translateX(-50%);
}

.effect-2 a:hover::after {
  right: 50%;
  opacity: 1;
  transform: rotate(0deg) translateX(50%);
}

.effect-3 {
  background-color: #2ac56c;
}

.effect-3 a {
  color: rgba(0, 0, 0, 0.2);
  font-weight: bold;
}

.effect-3 a::before {
  position: absolute;
  color: #ffffff;
  content: attr(data-hover);
  transition: transform 0.3s, opacity 0.3s;
}

.effect-3 a:hover::before {
  opacity: 0;
  transform: scale(0.9);
}

.effect-4 {
  background-color: #3fa46a;
}

.effect-4 a {
  padding: 8px;
  color: #237546;
  font-weight: bold;
}

.effect-4 a:hover {
  color: #ffffff;
  transition: color 0.3s;
}

.effect-4 a::before,
.effect-4 a::after {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: #ffffff;
  content: "";
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
}

.effect-4 a::before {
  top: 0;
  transform: translateY(-10px);
}

.effect-4 a::after {
  bottom: 0;
  transform: translateY(10px);
}

.effect-4 a:hover::before,
.effect-4 a:hover::after {
  opacity: 1;
  transform: translateY(0);
}