:root{
  --box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}
*{
  font-family: 'Kanit', sans-serif;
  font-weight: 400;
  box-sizing: border-box;
}
body{
  display: flex;
  background-color: #fbf9f9;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
}
.btn{
  font-family: 'Kanit', sans-serif;
  cursor: pointer;
  background-color: #ff00ff;
  font-size: 20px;
  border-radius: 5px;
  border: none;
  margin: 20px 0 20px;
  padding: 10px 20px;
  width: 100%;
  color: #fff;
  box-shadow: var(--box-shadow);
  font-style: oblique;
}
.btn:hover{
  background-color: #ea0cea;
}
.btn:active{
  transform: scale(0.98);
  box-shadow: none;
}
.container{
  margin: 30px auto;
  width: 350px;
}
h1{
  letter-spacing: 1px;
  margin: 0;
}
h3{
  border-bottom: 1px solid #bbb;
  padding-bottom: 10px;
  margin: 40px 0 10px ;
}
h4{
  margin: 0;
}
.incom-expense-container{
  display: flex;
  justify-content: space-between;
  margin: 20px 0;
  background-color: #fff;
  box-shadow: var(--box-shadow);
  padding: 20px;
  margin: 20px 0;
}
.incom-expense-container > div{
  flex: 1;
  text-align: center;
}
.incom-expense-container > div:first-of-type{
  border-right: 1px solid #bbb;
}
.money-plus{
  color: #2ecc71;
  font-size: 20px;
}
.money-minus{
  color: #c0392b;
  font-size: 20px;
}
label{
  display: inline-block;
  margin: 10px 0;
}
input[type="text"], input[type="number"]{
  width: 100%;
  border-radius: 5px;
  display: block;
  font-size: 16px;
  padding: 10px;
  border: 1px solid #ddd;
}
.list{
  list-style-type: none;
  padding: 0;
  margin-bottom: 40px;
}
.list li{
  background-color: #fff;
  box-shadow: var(--box-shadow);
  display:flex;
  justify-content: space-between;
  position: relative;
  padding: 10px;
  margin: 10px 0;
}
.list li.plus{
  border-right: 5px solid #2ecc71;
}
.list li.minus{
  border-right: 5px solid #ff0000;
}
.delete-btn{
  cursor: pointer;
  background-color: #ff0000;
  color: #fff;
  border: 0;
  font-size: 20px;
  padding: 2px 5px;
  line-height: 20px;
  position: absolute;
  top: 50%;
  left: 0;
  transform: translate(-100%, -50%);
  opacity: 0;
  transition: opacity 0.3s ease;
  border-radius: 5px;
  /* ❗️ ลูกเล่นนี้เหมาะแก่การนำมาใช้งาน */
}
/* เมื้อนำเม้าไปแตะที่ข้อความของเรา  opacity ตั้งให้ 1 คือการแสดงค่านั่นกลับมา*/
.list li:hover .delete-btn{
  opacity: 1;
}