body {
    font-family: Arial, sans-serif;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #00000038;
    padding: 10px;
    box-sizing: border-box;
}

.card {
    background: #e9e9e9;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    padding: 20px;
    width: 100%;
    max-width: 400px;
    text-align: center;
    transition: all 0.3s ease-in-out;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    text-align: left;
}

input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-sizing: border-box;
    font-size: 16px;
}

button {
    padding: 12px 15px;
    width: 100%;
    border: none;
    border-radius: 5px;
    background: linear-gradient(90deg, #1f5b94, #1a90f1);
    color: white;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s ease;
}

button:hover {
    background: linear-gradient(90deg, #1a90f1, #1f5b94);
}

.result {
    margin-top: 20px;
    font-size: 1.2em;
    font-weight: bold;
    color: #333;
}