body {
    font-family: Arial;
    background: #eef2f7;
    margin: 0;
}

.container {
    max-width: 600px;
    margin: auto;
    padding: 20px;
}

h1 {
    text-align: center;
    font-size: 26px;
}

h2 {
    margin-top: 20px;
    font-size: 18px;
}

.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.card {
    background: white;
    padding: 22px;
    border-radius: 18px;
    text-align: center;
    cursor: pointer;
    box-shadow: 0 3px 10px rgba(0,0,0,0.08);
    transition: 0.2s;
    font-size: 16px;
}

.card:hover {
    transform: scale(1.03);
}

.card.selected {
    background: #0077ff;
    color: white;
    transform: scale(1.05);
}

.price.selected {
    background: #00a651;
    color: white;
}

button {
    width: 100%;
    padding: 18px;
    font-size: 20px;
    background: #00a651;
    color: white;
    border: none;
    border-radius: 14px;
    margin-top: 25px;
}

.result {
    background: white;
    margin-top: 15px;
    padding: 15px;
    border-radius: 14px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.08);
}

.result a {
    display: inline-block;
    margin-top: 10px;
    background: #0077ff;
    color: white;
    padding: 10px 14px;
    border-radius: 10px;
    text-decoration: none;
}