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

body {
    min-height: 100vh;
    background-image: radial-gradient( circle farthest-corner at 1.3% 2.8%,  rgba(239,249,249,1) 0%, rgba(182,199,226,1) 100.2% );
    display: flex;
    justify-content: center;
    align-items: center;
}

.calculator {
    width: 300px;
    height: 500px;
    box-shadow: 4px 4px 30px rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    background: #22252D;
    overflow: hidden;
}

form input{
    width: 100%;
    height: 150px;
    border: none;
    border-radius: 12px;
    padding: 1rem;
    font-size: 2rem;
    color: white;
    background-color: #131a22;
    text-align: right;
    pointer-events: none;   
}

.buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 20px;

}

button {
    flex: 0 0 22%;
    margin: 5px 0;
    border: 1px solid black;
    width: 60px;
    height: 52px;
    font-size: 22px;
    font-weight: 600;
    border-radius: 5px;
    cursor: pointer;
}

.btn-yellow {
    background-color: #f39d56;
    color: white;
}

.btn-grey {
    background-color: #e0e0e0;
}

.btn-equal {
    background-color: #5e8489;
    color: white;
    margin-left: auto;
}

.btn-clear {
    background-color: #bf4331;
    color: white;
}