body {
    font-family: "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, #667eea, #764ba2);
    margin: 0;
    padding: 0;
}

.container {
    max-width: 500px;
    margin: 60px auto;
    background: whtie;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

h1 {
    text-align: center;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 20px;
    font-weight: bold;
}

input, select {
    width: 100%;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #ccc;
    box-sizing: border-box;
    font-size: 16px;
}

input::placeholder {
    color: #999;
}

button {
    width: 100%;
    padding: 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    background: #5563c1;
}

#result {
    margin-top: 25px;
    padding: 15px;
    background: #f4f6ff;
    border-radius: 8px;
    font-weight: bold;
    text-align: center;
}

@media (max-width: 600px) {
    .container {
        margin: 20px;
        padding: 25px;
    }
    
    h1 {
        font-size: 20px;
    }

    input, select, button {
        font-size: 14px;
    }
}