body {
    font-family: Arial, Helvetica, sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: hsl(0, 0%, 50%);
}

.container {
    width: 500px;
    background-color: hsl(0, 0%, 15%);
    border-radius: 5px;
    overflow: hidden;
}

#display {
    width: 85%;
    padding: 10px;
    margin: 10px;
    text-align: left;
    font-size: 2em;
    border: none;
    border-radius: 5px;
}

.calculator {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    padding: 20px;
}

button {
    height: 50px;
    width: 50px;
    border-radius: 5px;
    border: none;
    background-color: hsl(0, 0%, 0%);
    color: white;
    font-size: 1.25rem;
    font-weight: bold;
    cursor: pointer;
}

button:hover {
    background-color: hsl(0, 0%, 40%);
}

button:active {
    background-color: hsl(0, 0%, 30%);
}

.orange_btn {
    background-color: hsl(39, 100%, 50%);
}

.orange_btn:hover {
    background-color: hsl(39, 100%, 20%);
}

.orange_btn:active {
    background-color: hsl(39, 100%, 40%);
}

.gray_btn {
    background-color: hsl(0, 0%, 50%);
}

.gray_btn:hover {
    background-color: hsl(0, 0%, 20%);
}

.gray_btn:active {
    background-color: hsl(0, 0%, 40%);
}

#powerInfo {
    text-align: center;
    font-weight: bold;
    color: red;
}