body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
    background-color: #f9f9f9;
}

header {
    border-bottom: 2px solid #007bff;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

header h1 {
    margin: 0;
    color: #007bff;
}

nav a {
    margin-left: 1.5rem;
    text-decoration: none;
    color: #555;
    font-weight: 600;
}

nav a:hover {
    color: #007bff;
}

main {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

h1, h2, h3 {
    color: #222;
}

a {
    color: #007bff;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

code {
    background: #f0f0f0;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.9em;
}

pre {
    background: #272822;
    color: #f8f8f2;
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
}

pre code {
    background: none;
    padding: 0;
    color: inherit;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

table th, table td {
    border: 1px solid #ddd;
    padding: 0.8rem;
    text-align: left;
}

table th {
    background-color: #f8f9fa;
    font-weight: 600;
}

table tr:nth-child(even) {
    background-color: #fcfcfc;
}

table tr:hover {
    background-color: #f1f1f1;
}

.card {
    border: 1px solid #ddd;
    padding: 1rem;
    border-radius: 6px;
    margin: 1rem 0;
}

.download-btn {
    display: inline-block;
    background: #28a745;
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    font-weight: bold;
    margin-top: 1rem;
}

.download-btn:hover {
    background: #218838;
    text-decoration: none;
}

footer {
    margin-top: 3rem;
    text-align: center;
    font-size: 0.9rem;
    color: #777;
}