*{margin:0;padding:0;box-sizing:border-box}
        :root{
            --bg:#fff;--text:#333;--muted:#999;--light:#b5b5b5;--line:#e5e5e5;--dark:#1a1a1a;
            --blue:#2a6cb6;--blue-bg:#f0f5fb;
            --teal:#1a7a5a;--teal-bg:#edf7f2;
            --amber:#8a5a10;--amber-bg:#fdf5e6;
            --coral:#a04020;--coral-bg:#fdf0eb;
            --purple:#6b46a8;--purple-bg:#f4f0fa;
            --slate:#445566;--slate-bg:#f0f2f5;
        }
        ::selection{background:#d5d5d5;color:var(--dark)}
        html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
        body{font-family:'Source Serif 4',Georgia,serif;background:var(--bg);color:var(--text);line-height:1.75;font-size:17px;-webkit-font-smoothing:antialiased}

        .layout{display:flex;min-height:100vh;max-width:1060px;margin:0 auto;padding:56px 32px 56px 0}
        nav{position:sticky;top:56px;align-self:flex-start;min-width:150px;padding:0 36px 0 32px;text-align:right}
        nav a{display:block;font-family:'Inter',sans-serif;font-size:14px;font-weight:400;color:var(--muted);text-decoration:none;padding:4px 0;transition:color .2s}
        nav a:hover{color:var(--dark)}
        nav a.active{color:var(--dark);font-weight:500;text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
        .divider{width:1px;background:var(--line);flex-shrink:0}
        main{flex:1;padding-left:48px;max-width:680px}

        .page-label{font-family:'Inter',sans-serif;font-size:13px;color:var(--light);margin-bottom:2px}
        .page-name{font-size:20px;font-weight:400;color:var(--dark);margin-bottom:12px}
        .page-desc{font-size:16px;color:var(--muted);margin-bottom:40px;line-height:1.7}

        /* ── Overview grid ── */
        .overview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-bottom:36px}
        .overview-cell{background:var(--bg);padding:18px 14px;text-align:center}
        .overview-cell .num{font-family:'Source Serif 4',serif;font-size:28px;font-weight:600;color:var(--dark);line-height:1.1;margin-bottom:4px}
        .overview-cell .lbl{font-family:'Inter',sans-serif;font-size:10px;color:var(--light);text-transform:uppercase;letter-spacing:.08em}

        /* ── Phase ── */
        .phase{margin-bottom:40px}
        .phase-header{display:flex;align-items:center;gap:12px;margin-bottom:16px}
        .phase-num{font-family:'Inter',sans-serif;font-size:10px;font-weight:500;text-transform:uppercase;letter-spacing:.1em;padding:3px 10px;border:1px solid var(--line)}
        .phase-title{font-family:'Inter',sans-serif;font-size:14px;font-weight:500;color:var(--dark)}
        .phase-desc{font-size:15px;color:var(--muted);margin-bottom:14px;line-height:1.65}

        /* ── Module card ── */
        a.module{border:1px solid var(--line);padding:14px 16px;margin-bottom:5px;display:flex;align-items:flex-start;gap:12px;transition:border-color .2s;text-decoration:none;background:#fff}
        a.module:hover{border-color:var(--muted)}
        .module-num{font-family:'Inter',sans-serif;font-size:10px;font-weight:600;color:#fff;background:var(--teal);min-width:24px;height:24px;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px}
        .module-body{flex:1}
        .module-title{font-family:'Inter',sans-serif;font-size:13px;font-weight:600;color:var(--dark);margin-bottom:2px;transition:color .2s}
        .module-desc{font-family:'Inter',sans-serif;font-size:11px;color:var(--muted);line-height:1.6}
        .module-tags{margin-top:6px;display:flex;flex-wrap:wrap;gap:3px}
        .module-arrow{font-size:13px;color:var(--light);flex-shrink:0;margin-top:4px;transition:color .2s}
        a.module:hover .module-title{color:var(--blue)}
        a.module:hover .module-arrow{color:var(--muted)}
        .tag{display:inline-block;font-family:'Inter',sans-serif;font-size:9px;padding:2px 8px;border:1px solid transparent;text-transform:uppercase;letter-spacing:.04em}
        .tag-blue{background:var(--blue-bg);color:var(--blue)}
        .tag-teal{background:var(--teal-bg);color:var(--teal)}
        .tag-amber{background:var(--amber-bg);color:var(--amber)}
        .tag-coral{background:var(--coral-bg);color:var(--coral)}
        .tag-purple{background:var(--purple-bg);color:var(--purple)}
        .tag-slate{background:var(--slate-bg);color:var(--slate)}

        /* ── Hub note ── */
        .hub-badge{
            display:inline-flex;align-items:center;gap:6px;
            font-family:'Inter',sans-serif;font-size:10px;font-weight:500;
            text-transform:uppercase;letter-spacing:.08em;
            padding:3px 10px;background:var(--teal-bg);color:var(--teal);
            border:1px solid var(--teal);margin-bottom:6px;
        }
        .hub-badge::before{content:'◆';font-size:8px}

        /* ── Prerequisite banner ── */
        .prereq{
            border:1px solid var(--line);
            padding:14px 18px;
            margin-bottom:28px;
            display:flex;align-items:flex-start;gap:14px;
            background:#fafafa;
        }
        .prereq-label{
            font-family:'Inter',sans-serif;font-size:10px;font-weight:500;
            text-transform:uppercase;letter-spacing:.1em;
            color:var(--light);min-width:88px;
            padding-top:3px;flex-shrink:0;
        }
        .prereq-text{font-family:'Inter',sans-serif;font-size:13px;color:var(--muted);line-height:1.65}
        .prereq-text a{color:var(--dark);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}

        /* ── Flow diagram (journey map) ── */
        .flow-strip{
            display:flex;align-items:stretch;gap:0;
            border:1px solid var(--line);
            margin:24px 0 32px;
            overflow:hidden;
        }
        .flow-step{
            flex:1;padding:12px 10px 14px;
            border-right:1px solid var(--line);
            text-align:center;
            position:relative;
        }
        .flow-step:last-child{border-right:none}
        .flow-step .fs-num{
            font-family:'Inter',sans-serif;font-size:9px;font-weight:500;
            text-transform:uppercase;letter-spacing:.08em;
            color:var(--light);margin-bottom:5px;
        }
        .flow-step .fs-label{
            font-family:'Inter',sans-serif;font-size:11px;font-weight:500;
            color:var(--dark);line-height:1.3;
        }
        .flow-step.blok1{border-top:3px solid var(--teal)}
        .flow-step.blok2{border-top:3px solid var(--blue)}
        .flow-step.blok3{border-top:3px solid var(--amber)}

        /* ── Block divider label ── */
        .blok-separator{
            display:flex;align-items:center;gap:10px;
            margin:0 0 20px;
        }
        .blok-separator .bs-line{flex:1;height:1px;background:var(--line)}
        .blok-separator .bs-label{
            font-family:'Inter',sans-serif;font-size:10px;font-weight:500;
            text-transform:uppercase;letter-spacing:.1em;
            color:var(--light);white-space:nowrap;
        }

        /* ── Note ── */
        .note{border-left:3px solid var(--blue);padding:10px 16px;margin:20px 0;font-size:15px;background:var(--blue-bg);color:var(--blue)}
        .footer{margin-top:44px;padding-top:18px;border-top:1px solid var(--line);font-family:'Inter',sans-serif;font-size:12px;color:var(--light)}

        @media(max-width:768px){
            .layout{flex-direction:column;padding:28px 20px}
            nav{position:static;text-align:left;min-width:auto;padding:0 0 24px 0;display:flex;flex-wrap:wrap;gap:3px 14px}
            nav a{display:inline}
            .divider{width:100%;height:1px}
            main{padding-left:0;padding-top:28px;max-width:100%}
            .module{flex-direction:column;gap:10px}
            .overview-grid{grid-template-columns:repeat(2,1fr)}
            .flow-strip{flex-wrap:wrap}
            .flow-step{min-width:45%;border-bottom:1px solid var(--line)}
        }
    
        .skip-link{position:fixed;left:12px;top:12px;z-index:1000;padding:8px 12px;background:var(--dark);color:#fff;font-family:'Inter',sans-serif;font-size:12px;transform:translateY(-160%);transition:transform .15s}
        .skip-link:focus{transform:translateY(0)}
        :focus-visible{outline:3px solid var(--blue);outline-offset:3px}
        .review-strip{display:flex;flex-wrap:wrap;gap:7px 16px;margin:0 0 30px;padding:10px 12px;border:1px solid var(--line);background:#fafafa;font-family:'Inter',sans-serif;font-size:11px;line-height:1.5;color:var(--muted)}
        .review-strip strong{color:var(--dark)}
        .source-box{margin:46px 0 0;padding-top:18px;border-top:1px solid var(--line)}
        .source-box h2{font-size:15px;border:0;padding:0;margin-bottom:8px;text-transform:none}
        .source-box p{font-family:'Inter',sans-serif;font-size:11px;color:var(--muted);margin-bottom:9px}
        .source-box ul{display:flex;flex-wrap:wrap;gap:7px 16px;list-style:none}
        .source-box a{font-family:'Inter',sans-serif;font-size:11px;color:var(--blue);text-underline-offset:3px}
        [role="button"]{touch-action:manipulation}
        [aria-live="polite"]{contain:content}
        @media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
        @media(max-width:768px){
            nav{padding-bottom:12px!important;border-bottom:1px solid var(--line)}
            nav .nav-sep{display:none!important}
            nav a{display:none!important}
            nav a[href="../index.html"],nav a[href="dsroadmap2.html"],nav a.nav-back,nav a.active{display:inline-block!important}
            table{width:100%;table-layout:fixed;font-size:11px}
            th,td{padding:7px 5px!important;overflow-wrap:anywhere;word-break:normal}
            .page-nav{flex-direction:column}
            .review-strip{margin-bottom:24px}
        }