body {
    font-family: 'Segoe UI', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #1f1f1f, #3a3a3a);
    margin: 0;
}

.gridContainer_calc {
    display: grid;
    grid-template-columns: repeat(4, 70px);
    grid-auto-rows: 60px;
    gap: 8px;
    background-color: #1e272e;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.gridItem {
    background-color: #2f3640;
    color: white;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 24px;
    user-select: none;
}

.gridItem:hover {
    background-color: #40739e;
    transform: scale(1.05);
}

.gridItem:active {
    transform: scale(0.95);
}

.gridItem:nth-child(1) {
    grid-column: 1 / -1;
    justify-content: right;
    margin-bottom: 10px;
    font-size: 32px;
}

.gridItem:nth-child(2) {
    grid-column: span 2;
}

.gridItem:nth-child(17) {
    grid-column: span 2;
}
#display {
    text-align: right;
    background-color: #000;
    font-size: 28px;
    padding: 28px;
    border: none;
}

.operadores {
    background-color: #c23616;
}
.operadores:hover {
    background-color: #ff5e3a;
}