如何在输入栏底部制作非圆角线

Question

我正在制作流利风格的输入栏 这就是我的进步

但是，我希望它的线条没有圆角，并且当焦点放在它上面时它会改变它的高度（它移动布局）

我该怎么办？

这是我的代码↓

body {
  background-color: #1a2228;
}

input {
  background: #272f36;
  border: 1px solid #282d31;
  border-radius: 3px;
  width: 10em;
  line-height: 1.5em;
  outline: none;
  color: white;
  border-bottom: 1px solid #979a9e;
  padding-left: 5px;
  transition: 200ms;
}

input::placeholder {
  color: #aeaeae;
  transition: 200ms;
}

input:hover {
  transition: 200ms;
  background: #2d343b;
}

input:focus {
  background: #1d1f21;
  transition: 200ms;
  border-bottom: 2px #4cc2ff solid;
}

input:focus::placeholder {
  color: #959697;
}

input[type="number"]::-webkit-inner-spin-button {
  cursor: pointer;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
}

<input id="a" type="number" min="0" max="100" placeholder="test">

没有圆角底部，像微软流利设计

Answer 1

body {
  background-color: #1a2228;
}

input {
  box-sizing: border-box;
  background: #272f36;
  border-radius: 3px;
  line-height: 1.5em;
  border: 0;
  outline: none;
  color: white;
  border-bottom: 1px solid #979a9e;
  width: 100%;
}

input:focus {
  border-color: transparent;
}

.myinput {
  width: 10em;
}

.myinput:has(input:focus) {
  border-bottom: 1px solid #4cc2ff;
}

<div class="myinput">
  <input>
</div>