body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #74ebd5, #acb6e5);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}
.container {
    background: #fff;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 100%;
    max-width: 400px;
}
h1 {
    margin-bottom: 1rem;
    color: #333;
}
.input-group {
    margin-bottom: 1rem;
    text-align: left;
}
label {
    font-weight: bold;
    display: block;
    margin-bottom: 0.5rem;
    color: #555;
}
input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ccc;
    border-radius: 10px;
    font-size: 1rem;
    outline: none;
}
button {
    background: #4CAF50;
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: background 0.3s;
    width: 100%;
}
button:hover {
    background: #45a049;
}
.result {
    margin-top: 1.5rem;
    font-size: 1.2rem;
    font-weight: bold;
    color: #333;
}