/* General styling */
body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 50px auto;
    background: #fff;
    padding: 20px 30px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #333;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

input[type="text"],
input[type="email"],
input[type="number"],
select {
    width: calc(100% - 22px);
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-sizing: border-box;
    font-size: 16px;
}

select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNiIgaGVpZ2h0PSIxNiIgdmlld0JveD0iMCAwIDE2IDE2Ij4gICAgPHBvbHlnb24gcG9pbnRzPSI0Ljc1IDYuNzUgMCAyIDE2IDIgMTEuMjUgNi43NSIgZmlsbD0iIzAwMCIgLz48L3N2Zz4=') no-repeat right 10px center;
    background-size: 12px;
}

.products-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 20px;
}

.product {
    background: #f9f9f9;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);
}

.product p {
    margin: 10px 0;
}

.btn {
    display: block;
    width: 100%;
    padding: 15px;
    background: #28a745;
    color: #fff;
    border: none;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
    text-align: center;
}

.btn:hover {
    background: #218838;
}

input[type="number"] {
    width: 100%;
}

input:invalid {
    border-color: #dc3545;
}

input:valid {
    border-color: #28a745;
}