<div class="sd"><div class="sd-head"><strong>MEMORY POISONING</strong><span id="state">live check</span></div><div class="sd-stage"><div class="mp-timeline"><div><b>NOW</b><span>external note</span></div><div><b>STORE</b><span id="memory">unchecked memory</span></div><div><b>LATER</b><span id="later">new task</span></div></div><div class="mp-marker" id="marker">QUARANTINE</div></div><div class="sd-foot"><span id="caption">checking boundary</span><span>tap to step</span></div></div>
.sd{box-sizing:border-box;width:min(94vw,700px);height:min(86vh,318px);padding:clamp(9px,2.3vmin,18px);border:1px solid var(--line);border-radius:14px;background:var(--surface);color:var(--fg);display:flex;flex-direction:column;gap:clamp(6px,1.8vmin,12px);font:600 clamp(12px,2.6vmin,16px)/1.25 var(--font-sans, sans-serif)}.sd *{box-sizing:border-box}.sd-head,.sd-foot{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:1.25em}.sd-head strong{color:var(--accent);letter-spacing:.06em}.sd-head span,.sd-foot{color:var(--muted)}.sd-foot{font-size:clamp(12px,2.4vmin,14px)}.sd-stage{position:relative;flex:1;min-height:0;display:flex;align-items:center;justify-content:center;gap:clamp(6px,2vmin,18px);overflow:hidden}.sd .mono{font-family:ui-monospace,monospace}.sd .tile{border:1px solid var(--line);border-radius:8px;background:var(--bg);padding:clamp(5px,1.5vmin,10px);text-align:center}.sd .good{color:var(--accent);border-color:var(--accent)}.sd .bad{color:var(--accent-3);border-color:var(--accent-3)}.sd .arrow{color:var(--muted);font-size:clamp(15px,4vmin,28px)}.sd .active{background:color-mix(in srgb,var(--accent) 16%,var(--surface));border-color:var(--accent)}.sd .blocked{background:color-mix(in srgb,var(--accent-3) 13%,var(--surface));border-color:var(--accent-3)}.sd-stage{flex-direction:column}.mp-timeline{display:flex;width:100%;gap:clamp(4px,1.4vmin,12px);position:relative}.mp-timeline:before{content:'';position:absolute;top:18px;left:10%;right:10%;border-top:2px solid var(--line)}.mp-timeline>div{position:relative;flex:1;display:grid;gap:clamp(5px,1.5vmin,10px);text-align:center}.mp-timeline b{border:1px solid var(--line);border-radius:50%;background:var(--surface);width:clamp(42px,13vmin,70px);height:clamp(42px,13vmin,70px);display:grid;place-items:center;margin:auto;color:var(--accent)}.mp-timeline span{font-size:clamp(12px,2.4vmin,14px)}.mp-timeline .poison{color:var(--accent-3)}.mp-marker{border:1px solid var(--accent-3);border-radius:6px;padding:clamp(3px,1vmin,7px);color:var(--accent-3);opacity:.75;transition:opacity .2s}.mp-marker.on{opacity:1}
let n=-1;function advance(){n=1-n;document.getElementById('memory').classList.toggle('poison',!!n);document.getElementById('later').textContent=n?'blocked reuse':'new task';document.getElementById('marker').classList.toggle('on',!!n);document.getElementById('state').textContent=n?'source untrusted':'memory stored';document.getElementById('caption').textContent=n?'check provenance before future use':'unverified note enters memory'}advance();setInterval(advance,1000);
document.querySelector('.sd').addEventListener('pointerdown',advance);
