body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    /* background: url('https://www.lavmi.com/uploads/assets/images/know-how/spocitat/jak-spocitat-fin(1).jpg') no-repeat center center fixed; */
    background-image: url('bg.jpg');
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    flex-direction: column;
}

h1 {
    color: rgb(255, 255, 131);
    font-size: 4.2rem;
    margin-top: 12px;
    text-shadow: 3px 5px 0px #000;
}

.calculator {
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 30px 40px;
    border-radius: 20px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 1);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 80%;
    width: 400px;
}

.calculator input[type="text"],
.calculator input[type="number"] {
    padding: 10px;
    font-size: 1.2rem;
    width: 100%;
    margin: 10px 0;
    border: none;
    border-radius: 10px;
    box-shadow: inset 0px 0px 5px #ccc;
}

.buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.buttons button {
    padding: 10px 15px;
    font-size: 1.2rem;
    background-color: lightgreen;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.buttons button:hover {
    background-color: #7ccc7c;
}

#result {
    color: lightskyblue;
    font-size: 1.7rem;
    margin-top: 25px;
    font-weight: bold;
}

@media screen and (max-width: 500px) {
    h1 {
        font-size: 2rem;
    }

    .calculator {
        padding: 20px;
    }

    .buttons button {
        font-size: 1rem;
        padding: 8px 12px;
    }
}