btn-css1

gistfile1.css

// 押したらくぼむ
.press {
  transition: .3s;
  border-radius: 5px;
  background: linear-gradient(to bottom, #ffa670 0%, #fc5800 65%);
  text-decoration: none;
  padding: 15px 30px;
  display: inline-block;
  color: #ffffff;
  text-shadow: 1px 1px 1px #912C1D;
  box-shadow: 0 3px #C94528;
}
.press:hover {
  background: linear-gradient(to bottom,#fc5800 0%, #fc5800 65%);
}
// ホバーしたら破線で囲う
.dashed {
  background: #333;
  color: #fff;
  border: 1px solid #333;
  padding: 14px 30px;
}
.dashed:hover {
  background: #fff;
  border: 1px solid orangered;
  border-style:dashed;
  border-radius: 30px;
  color: orangered;
}
// 括弧で囲う
.bracekts {
  background: #fff;
  color:#333 ;
  position: relative;
  font-weight: bold;
  padding: 15px 25px;
  display: inline-block;
  text-align: center;
  transition: .3s;
}
.bracekts::before {
  top: 0;
  left: 0;
  border-left: 2px solid #333;
  border-top: 2px solid #333;
  transition: .3s;
}
.bracekts::after {
  bottom: 0;
  right: 0;
  border-right: 2px solid #333;
  border-bottom: 2px solid #333;
  transition: .3s;
}
.bracekts::after,
.bracekts::before {
  position: absolute;
  display: block;
  content: '';
  width: 100%;
  height: 100%;
}
.bracekts:hover {
  color: rgb(42, 148, 190);
}
.bracekts:active {
  opacity: .5;
}
.bracekts:hover::after,.bracekts:hover::before {
  width: 30px;
  height: 20px;
}