body {
    width: 100vw;
    height: 100vh;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.box {
    width: 400px;
    height: 300px;
    background-color: #f3f3f3;
    float: left;
    margin: 10px;
    display: grid;
    border-radius: 10px;
    box-shadow: 5px 5px 20px #e7e7e7;
    font-family: 'Titillium Web';
}

.inside {
    width: 200px;
    height: 100px;
    /*background-color: white;
    border: 1px solid black;*/
    margin: 50px 100px;
    text-align: center;
    position:absolute;
}

.calc-button {
    width: 200px;
    height: 50px;
    text-align: center;
    position: absolute;
    border: 2px solid #e7e7e7;
    color: gray;
    background-color: #e7e7e7;
    font-size: 16pt;
    border-radius: 12px;
    transition-duration: 0.4s;
    margin: 220px 100px;
    font-family: 'Titillium Web';
}
.calc-button:hover {
    background-color: white;
}

.input-container {
    position: absolute;
}

input {
    width: 194px;
    height: 50px;
    font-size: 19pt;
    margin: 150px 100px;
    position: absolute;
    border-radius: 12px;
    border: 2px solid #e7e7e7;
    color: gray;
    transition-duration: 0.4s;
    text-align: center;
    font-family: 'Titillium Web';
}
input:hover {
    background-color: #e7e7e7;
}
input:focus {
    outline: none;
}
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

label {
    font-size: 30pt;
}