:root{color-scheme:light;font-family:Helvetica Neue,Arial,sans-serif;line-height:1.5;color:#1f2937;background:#f7f8fa}*{box-sizing:border-box}body{margin:0}.container{max-width:860px;margin:0 auto;padding:2rem 1.25rem 3rem}h1,h2{margin:0 0 1rem;color:#111827}.card-list{display:grid;gap:1rem;margin-top:1.5rem}.card{display:block;padding:1rem;border:1px solid #d1d5db;border-radius:10px;background:#fff;color:#111827;text-decoration:none;font-weight:600}.card:hover{border-color:#9ca3af}.markdown-content{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:1.5rem}.markdown-content>*:first-child{margin-top:0}.markdown-content>*:last-child{margin-bottom:0}.markdown-content p,.markdown-content ul,.markdown-content ol{margin:0 0 1rem}.markdown-content a{color:#1d4ed8}.back-link{display:inline-block;margin-top:2rem;color:#1d4ed8;text-decoration:none}.back-link:hover{text-decoration:underline}