如何填充填充不会移动其他元素？

Question

我正在尝试制作一排三个按钮。其中一个按钮具有:hover属性，使其边缘增加。这看起来像这样：

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button {
  position: relative;
  height: 45px;
  width: 150px;
  margin: 10px 8px;
  padding: 5px 5px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 2px;
  color: #383736;
  border: 2px #383736 solid;
  border-radius: 4px;
  text-transform: uppercase;
  outline: 0;
  overflow:hidden;
  background: none;
  z-index: 1;
  cursor: pointer;
  transition: 0.15s;
}

button:hover {
  color: whitesmoke;
}

.btn:hover:before {
  right: 0;
}

.btn:before {
  content: "";
  position: absolute;
  background: #383736;
  bottom: 0;
  left: 0;
  right: 100%;
  top: 0;
  z-index: -1;
  transition: right .15s;
}

.btn2:hover:before {
  top: 0;
}

.btn2:before {
  content: "";
  position: absolute;
  background: #383736;
  bottom: 0;
  left: 0;
  top: 100%;
  right: 0;
  z-index: -1;
  transition: top .15s;
}

.continue {
  border-color: lime;
  color: lime;
}

.continue:before {
  content: "";
  background-color: lime;
}

.continue:hover {
  padding-top: 20px;
}

.continue:hover:before {
  content: "\2192";
}

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<button class = "btn">
  HOVER
</button>

<button class = "btn2">
  HOVER
</button>

<button class = "btn continue">
  CONTINUE
</button>

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当您悬停第三个按钮时，它的填充顶部会发生变化，因此其他两个按钮会向下移动。除了其他两个按钮不移动之外，我能做些什么来使它具有相同的效果？

Answer 1

将vertical-align: top（默认为baseline）添加到按钮就足够了

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button {
  position: relative;
  height: 45px;
  width: 150px;
  margin: 10px 8px;
  padding: 5px 5px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 2px;
  color: #383736;
  border: 2px #383736 solid;
  border-radius: 4px;
  text-transform: uppercase;
  outline: 0;
  overflow:hidden;
  background: none;
  z-index: 1;
  cursor: pointer;
  transition: 0.15s;
  vertical-align: top;
}

button:hover {
  color: whitesmoke;
}

.btn:hover:before {
  right: 0;
}

.btn:before {
  content: "";
  position: absolute;
  background: #383736;
  bottom: 0;
  left: 0;
  right: 100%;
  top: 0;
  z-index: -1;
  transition: right .15s;
}

.btn2:hover:before {
  top: 0;
}

.btn2:before {
  content: "";
  position: absolute;
  background: #383736;
  bottom: 0;
  left: 0;
  top: 100%;
  right: 0;
  z-index: -1;
  transition: top .15s;
}

.continue {
  border-color: lime;
  color: lime;
}

.continue:before {
  content: "";
  background-color: lime;
}

.continue:hover {
  padding-top: 20px;
}

.continue:hover:before {
  content: "\2192";
}

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<button class = "btn">
  HOVER
</button>

<button class = "btn2">
  HOVER
</button>

<button class = "btn continue">
  CONTINUE
</button>

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