* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}


body {
    width: 100vw;
    height: 100vh;
    background-color: #1c1c1c;
}

#container {
    height: 100vh;
    width: 400px;
    display: flex;
    flex-direction: column;
    margin: auto;
}

input {
    background-color: #1c1c1c;
    border: 0;
    outline: none;
    font-size: 54px;
    color: white;
    padding: 0px 32px;
    flex-grow: 1;
    text-align: right;
}

.button-grid {
    display: grid;
    grid-template-rows: 1fr 1fr 1fr 1fr 1fr ;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 5px;
    flex-grow: 2;
}

button {
    border-radius: 50%;
    width: 80%;
    height: 80%;
    place-self: center;
    border: 0;
    font-size: 28px;
    cursor: pointer;
    background-color: #505050;
    color: white;
    transition-property: transform;
    transition-duration: 200ms;
}

button:active{
    transform: scale(0.85);
}

.gray-button {
background-color: #d4d4d2;
color: black;
}

.yellow-button{
     background-color: rgb(238,171,14);
     color: white;
}
.zero {
    grid-column: span 2;
    border-radius: 75px;

}