*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}
body{
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: pink;
}
.text-box{
    position: relative;
    background: #fff;
    width: 600px;
    margin: 10px;
    padding: 0 20px 20px 20px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgb(1 1 1 / 10%);
}
.text-box .top-area{
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 20px 0;
}
.text-box .top-area h2{
    font-size: 1.5em;
    font-weight: 700;
}
.text-box .top-area .copy-btn{
    background-color: #eee;
    color: #999;
    font-size: 1.5em;
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    cursor: pointer;
}
.text-box .top-area .copy-btn:hover{
    color: #222;
}
.text-box textarea{
    width: 100%;
    min-height: 310px;
    font-size: 1em;
    padding: 10px;
    outline: none;
    resize: none;
    border-radius: 5px;
    border: 1px solid rgb(254, 150, 168);
}