/* Umumiy body */
body {
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #74ebd5, #ACB6E5);
    margin: 0;
}

/* Kalkulyator konteyneri */
.container {
    background-color: #fff;
    padding: 30px 50px;
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    text-align: center;
    transition: transform 0.3s ease;
}

.container:hover {
    transform: scale(1.05);
}

/* Sarlavha */
h1 {
    margin-bottom: 20px;
    color: #333;
}

/* Input va select */
.input-group input, select {
    padding: 10px 15px;
    margin: 10px 5px;
    border-radius: 10px;
    border: 1px solid #ccc;
    font-size: 16px;
    outline: none;
    transition: all 0.3s ease;
}

.input-group input:focus, select:focus {
    border-color: #74ebd5;
    box-shadow: 0 0 5px #74ebd5;
}

/* Tugma */
button {
    padding: 10px 20px;
    margin-top: 15px;
    border: none;
    border-radius: 10px;
    background-color: #74ebd5;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.2s ease;
}

button:hover {
    background-color: #ACB6E5;
    transform: scale(1.05);
}

/* Natija */
#natija {
    margin-top: 20px;
    font-size: 20px;
    font-weight: bold;
    color: #333;
    transition: color 0.3s ease;
}

#natija.negative {
    color: red;
}