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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #f4f7f6;
    color: #2d3748;
    line-height: 1.6;
    padding: 40px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

h1 {
    font-size: 2.2rem;
    color: #1a365d;
    margin-bottom: 30px;
    text-align: center;
    font-weight: 700;
}

.card-container {
    display: flex;
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    width: 100%;
    max-width: 1300px;
}

.card {
    background: #ffffff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    width: 380px;
    text-align: center;
    transition: transform 0.2s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.card:hover {
    transform: translateY(-4px);
}

.card img {
    max-width: 100px;
    height: auto;
    margin-bottom: 15px;
}

.title {
    font-size: 1.8rem;
    font-weight: bold;
    color: #2b6cb0;
    text-align: center;
    margin-bottom: 10px;
}

.description {
    font-size: 1rem;
    color: #4a5568;
    font-style: italic;
    margin-bottom: 20px;
}

button {
    background-color: #3182ce;
    color: white;
    border: none;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    width: 100%;
    transition: background-color 0.2s ease;
    margin-top: auto;
}

button:hover {
    background-color: #2b6cb0;
}

button:disabled {
    background-color: #aaaaaa;
    cursor: not-allowed;
}

.footer {
    margin-top: auto;
    padding-top: 40px;
    font-size: 0.85rem;
    color: #718096;
    text-align: center;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.2rem;
    }

    .card-container {
        flex-direction: column;
        align-items: center;
    }

    .card {
        width: 100%;
        max-width: 400px;
        margin: 10px 0;
    }
}