*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body{
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background-color: #000;
    height: 100vh;
    letter-spacing: 1px;
}
body > h2{
    color: #fff;
    margin: 30px 0;
    font-weight: 600;
    text-shadow: 0 0 5px rgb(255, 54, 121);
    letter-spacing: 10px;
    word-spacing: 10px;
    font-size: 20px;
    text-transform: uppercase;
    text-align: center;
}

.box{
    width: 470px;
    height: 400px;
    padding: 30px 10px;
    background-color: #111;
    color: #fff;
    text-align: center;
    border-radius: 10px;
    box-shadow: inset 0 0 20px 5px rgb(255, 54, 121);
}
.box > h1{
    margin-bottom: 20px;
}

.input-group input,
.input-group select,
.input-group button{
    width: 130px;
    padding: 10px 10px;
    font-size: 15px;
    outline: none;
    border: none;
    border-radius: 4px;
    background-color: #212121;
    color: #fff;
    box-shadow: inset 0 0 10px 2px rgb(255, 54, 121);
    transition: all .3s;
}
.input-group select{
    cursor: pointer;
}
.input-group input{
    border-radius: 0;
    box-shadow: none;
    border: 1px solid rgb(255, 54, 121);
}
.input-group button{
    margin-left: 10px;
    width: 85px;
}
.input-group button:hover{
    background-color: rgb(255, 54, 121);
    cursor: pointer;
}

.box .result{
    font-weight: 600;
    width: 81%;
    height: 200px;
    padding: 20px 10px;
    margin: 20px auto;
    border: 1px solid rgb(255, 54, 121);
}