body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f7f7f8;
    margin: 0;
    padding: 0;
}

header {
    background: #1e293b;
    color: white;
    padding: 20px;
    text-align: center;
}

h1 { margin: 0; }

.container {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

.pdf-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.pdf-item {
    background: white;
    padding: 20px;
    border-radius: 10px;
    border: 1px solid #ddd;
}

.pdf-item h3 {
    margin-top: 0;
}

a.pdf-link {
    display: inline-block;
    margin-top: 10px;
    padding: 8px 12px;
    background: #2563eb;
    color: white;
    text-decoration: none;
    border-radius: 5px;
}

a.pdf-link:hover {
    background: #1d4ed8;
}