* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, sans-serif; color: #222; }
.layout { display: flex; min-height: 100vh; }
.sidebar { width: 220px; flex-shrink: 0; background: #1c2733; color: #fff; padding: 1rem; }
.sidebar-home { color: #fff; font-weight: bold; text-decoration: none; display: block; margin-bottom: 1rem; }
.brand-list { list-style: none; margin: 0; padding: 0; }
.brand-list a { color: #cfd8e3; text-decoration: none; display: block; padding: 0.25rem 0; }
.brand-list li.active > a { color: #fff; font-weight: bold; }
.year-list { list-style: none; margin: 0; padding-left: 1rem; }
.content { flex: 1; padding: 2rem; max-width: 900px; }
.document-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 1rem; }
.document-card { display: block; border: 1px solid #ddd; border-radius: 6px; padding: 0.5rem; text-decoration: none; color: inherit; }
.document-card img { width: 100%; height: auto; display: block; margin-bottom: 0.5rem; }
.doc-type-badge { font-size: 0.75rem; background: #eef2f6; padding: 0.1rem 0.4rem; border-radius: 4px; }
.search-form { margin-bottom: 1rem; }
.site-footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid #ddd; font-size: 0.8rem; color: #666; }
.site-footer p { margin: 0.25rem 0; }
.site-footer a { color: #666; }