body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: #eef1f5;
    color: #333;
}

header {
    background: #ffffff;
    color: #333;
    padding: 2rem 0;
    text-align: center;
    border-bottom: 1px solid #e0e0e0;
}

header h1 {
    margin: 0;
    font-size: 2.8em;
    letter-spacing: 1px;
}

header p {
    font-size: 1.2em;
    margin-top: 5px;
    opacity: 0.9;
}

main {
    padding: 20px;
    max-width: 1200px;
    margin: 20px auto;
}

section {
    margin-bottom: 25px;
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

section h2 {
    color: #0056b3;
    text-align: center;
    margin-bottom: 25px;
    font-size: 2em;
}

.card-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    margin-top: 20px;
}

.card {
    background: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    padding: 25px;
    flex: 1 1 calc(33% - 40px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    text-align: center;
    min-width: 280px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    animation: fadeIn 0.5s ease-in-out;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.2);
}

.card h3 {
    color: #007bff;
    margin-top: 0;
    font-size: 1.5em;
    margin-bottom: 10px;
}

.card p {
    font-size: 1.1em;
    color: #555;
}

.data-container {
    text-align: center;
    font-size: 1.2em;
    /* Removed redundant padding, border-radius, background, border as it's now inside a card */
    /* padding: 15px;
    border-radius: 8px;
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    margin-top: 20px; */
}

.data-container p {
    margin: 5px 0;
}

.data-container span {
    font-weight: bold;
    color: #007bff;
    font-size: 1.3em;
}

.download-button {
    display: inline-block;
    background: #28a745;
    color: #fff;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 30px;
    margin-top: 20px;
    font-size: 1.1em;
    transition: background 0.3s ease, transform 0.3s ease;
}

.download-button:hover {
    background: #218838;
    transform: translateY(-2px);
}

.download-button:active {
    transform: translateY(0);
    background: #1e7e34;
}

footer {
    text-align: center;
    padding: 20px;
    background: #343a40;
    color: #fff;
    margin-top: 30px;
    box-shadow: 0 -2px 5px rgba(0,0,0,0.1);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .card-container {
        flex-direction: column;
    }
    .card {
        flex: 1 1 100%;
    }
}