@import url('https://fonts.googleapis.com/css2?family=Cardo:ital@1&family=IBM+Plex+Sans+Thai:wght@500&display=swap');
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'IBM Plex Sans Thai ', sans-serif;
}
body{
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(125deg, #e67e22, #f1c40f);
}
.box{
    width: 380px;
    padding: 20px;
    border-radius: 10px;
    background: #000;
}
.number{
    width: 100%;
    color: white;
    font-size: 3rem;
    text-align: end;
}
.btn{
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: #A0A0A0;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    cursor: pointer;
    transition: 1ms;
    color: #000;
    font-weight: bold;
}
.btn:hover{
    background: #d3238f;
}
.row{
    width: 100%;
    display: flex;
    justify-content: space-around;
    align-items: center;
    margin-bottom: 15px;

}
.btn-operator{
    background: #f69A06;
    color: #fff;
}
.btn-number {
    background: #313131;
    color: #fff;
}
.btn-zero {
    width: 140px;
    height: 70px;
    border-radius: 50px;
     justify-content: flex-start;
     padding-left: 20px;
     align-items: center;
     font-size: 1.5rem;
     cursor: pointer;
}
.operator-active{
    background: #fff;
    color: #f69A06;

}