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

body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #1d1f27, #3e64ff);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.calculator {
    width: 300px;
    padding: 30px;
    background-color: #fff;
    border-radius: 20px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    transform: perspective(800px) rotateX(5deg) rotateY(-5deg);
    transition: all 0.3s ease;
}

.calculator:hover {
    transform: perspective(800px) rotateX(0deg) rotateY(0deg);
}

h2 {
    text-align: center;
    color: #333;
}

.input-container {
    margin-bottom: 20px;
}

.input-container label {
    display: block;
    font-size: 14px;
    margin-bottom: 5px;
    color: #555;
}

.input-container input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 10px;
    font-size: 16px;
}

.result {
    margin-top: 20px;
    text-align: center;
    font-size: 18px;
    font-weight: bold;
}

button {
    width: 100%;
    padding: 12px;
    border: none;
    background-color: #3e64ff;
    color: #fff;
    font-size: 16px;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #1d1f27;
}