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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.5;
    color: #1D1D1F;
    background-color: #F5F5F7;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.message {
    text-align: center;
    padding: 40px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 24px;
    margin-bottom: 16px;
}

p {
    color: #86868B;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

h2 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #1D1D1F;
}

h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #1D1D1F;
}

.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.file-card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.file-card ul {
    list-style: none;
}

.file-card li {
    margin-bottom: 10px;
}

.file-card a {
    color: #007AFF;
    text-decoration: none;
    display: block;
    padding: 8px 0;
}

.file-card a:hover {
    text-decoration: underline;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: #86868B;
}

@media (max-width: 600px) {
    body {
        padding: 10px;
    }
    
    .file-grid {
        grid-template-columns: 1fr;
    }
}