* {
    margin: 0;
    padding: 0;
}
#box {
    width: 500px;
    height: 600px;
    background-color: #e9e9e9;
    margin: 20px auto;
    border-radius: 10px;
}
#header {
    background-color: #bbbbbb;
    width: 500px;
    height: 50px;
    border-radius: 10px 10px 0 0;
}
.text {
    text-align: center;
    vertical-align: middle;
    font-size: 22px;
    font-weight: 700;
    color: #000;
    font-family: 'iranSans';
    padding-top: 8px;
}
ul {
    display: flex;
    flex-direction: column;
    list-style-type: none;
    width: 350px;
    margin: 0 auto;
    padding: 0;
}
ul li {
    font-size: 18px;
    font-family: "iranSans";
    margin: 5px 10px;
}
ul li button {
    color : red;
    font-size: 15px;
    font-family: "iranSans";
    background-color: transparent;
    border : none;
    margin-right: 5px;
    cursor: pointer;
    float: left;
}
ul li input {
    float: right;
    margin: 7px -22px 0 0;
    width: 15px;
    height: 15px;
}
#inputGroup {
    display: block;
    flex-direction: row;
    margin: 20px 10%;
}
#input {
    width: 300px;
    height: 30px;
    padding: 5px;
    border: none;
    outline: none;
    border-radius: 0 6px 6px 0;
}
#input::placeholder {
    padding: 5px;
    font-size: 16px;
    font-family: 'iranSans';
}
#btn {
    height: 40px;
    padding: 5px;
    border: none;
    background-color: lightseagreen;
    outline: none;
    border-radius: 6px 0 0 6px;
    font-size: 14px;
    color: #fff;
    font-family: 'iranSans';
    cursor: pointer;
}