* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f7f9fc;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 20px;
}

h1 {
    font-size: 2em;
    color: #ffffff;
    background-color: #4a90e2;
    padding: 15px;
    border-radius: 8px;
}

.step-container {
    text-align: center;
    max-width: 800px;
}

.hidden {
    display: none;
}

h2 {
    color: #4a90e2;
    font-size: 1.8em;
    margin-bottom: 10px;
}

h3 {
    color: #4a90e2;
    font-size: 1.4em;
    margin-top: 20px;
}

.options-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 10px;
}

.option {
    border: 2px solid #4a90e2;
    padding: 15px;
    border-radius: 12px;
    width: 250px;
    text-align: center;
    cursor: pointer;
    background-color: #ffffff;
    transition: all 0.3s ease;
}

.option .price {
    font-size: 1.2em;
    color: #333;
    margin-top: 8px;
}

.option.selected {
    background-color: #e0f7e9;
    border-color: #4CAF50;
    position: relative;
}

.option.selected::after {
    content: '✔';
    color: #4CAF50;
    font-size: 1.2em;
    position: absolute;
    top: 10px;
    right: 15px;
}