* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: #f0f0f0;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #6200ea;
    margin-bottom: 20px;
}

.unit-section, .product {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

select, input {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    width: 100%;
    padding: 10px;
    background: #6200ea;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-bottom: 10px;
}

button:hover {
    background: #3700b3;
}

.remove {
    background: #d32f2f;
}

.remove:hover {
    background: #b71c1c;
}

.product {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

#results {
    margin-top: 20px;
}

.result-item {
    padding: 10px;
    border-bottom: 1px solid #ddd;
}

.cheapest {
    background: #e8f5e9;
    border: 2px solid #4caf50;
    border-radius: 5px;
}

@media (max-width: 400px) {
    .container {
        padding: 10px;
    }
    input, select, button {
        font-size: 14px;
    }
}