/* roulang page: index */
:root {
            --primary-blue: #1D4ED8;
            --accent-sky: #0EA5E9;
            --bg-soft: #F0F5FA;
            --text-dark: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-body);
            background-color: #FFFFFF;
            -webkit-font-smoothing: antialiased;
        }
        .blueprint-grid {
            background-color: #F8FAFC;
            background-image: linear-gradient(to right, #EEF2F6 1px, transparent 1px),
                              linear-gradient(to bottom, #EEF2F6 1px, transparent 1px);
            background-size: 32px 32px;
        }
        .card-subtle-shadow {
            box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-subtle-shadow:hover {
            box-shadow: 0 16px 32px -4px rgba(29, 78, 216, 0.1), 0 4px 12px -2px rgba(15, 23, 42, 0.04);
            transform: translateY(-2px);
        }
        .text-balance {
            text-wrap: balance;
        }

/* roulang page: article */
:root {
            --primary-blue: #1D4ED8;
            --accent-sky: #0EA5E9;
            --bg-soft: #F0F5FA;
            --text-dark: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-body);
            background-color: #FFFFFF;
            -webkit-font-smoothing: antialiased;
        }
        .blueprint-grid {
            background-color: #F8FAFC;
            background-image: linear-gradient(to right, #EEF2F6 1px, transparent 1px),
                              linear-gradient(to bottom, #EEF2F6 1px, transparent 1px);
            background-size: 32px 32px;
        }
        .card-subtle-shadow {
            box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-subtle-shadow:hover {
            box-shadow: 0 16px 32px -4px rgba(29, 78, 216, 0.1), 0 4px 12px -2px rgba(15, 23, 42, 0.04);
            transform: translateY(-2px);
        }
        .text-balance {
            text-wrap: balance;
        }
        .article-content {
            font-size: 1.0625rem;
            line-height: 1.85;
            color: #334155;
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #0F172A;
            margin-top: 2.25rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #E2E8F0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .article-content h2::before {
            content: "";
            display: inline-block;
            width: 4px;
            height: 1.25rem;
            background-color: #1D4ED8;
            border-radius: 2px;
        }
        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: #1E293B;
            margin-top: 1.75rem;
            margin-bottom: 0.75rem;
        }
        .article-content p {
            margin-bottom: 1.25rem;
        }
        .article-content ul, .article-content ol {
            margin-bottom: 1.25rem;
            padding-left: 1.5rem;
        }
        .article-content ul {
            list-style-type: disc;
        }
        .article-content ol {
            list-style-type: decimal;
        }
        .article-content li {
            margin-bottom: 0.5rem;
        }
        .article-content blockquote {
            border-left: 4px solid #1D4ED8;
            padding: 0.75rem 1.25rem;
            background-color: #F8FAFC;
            color: #475569;
            margin: 1.5rem 0;
            border-radius: 0 0.5rem 0.5rem 0;
        }
        .article-content pre {
            background-color: #0F172A;
            color: #E2E8F0;
            padding: 1.25rem;
            border-radius: 0.5rem;
            overflow-x: auto;
            margin: 1.5rem 0;
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            font-size: 0.875rem;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.875rem;
        }
        .article-content th, .article-content td {
            border: 1px solid #E2E8F0;
            padding: 0.75rem 1rem;
            text-align: left;
        }
        .article-content th {
            background-color: #F1F5F9;
            font-weight: 600;
            color: #0F172A;
        }