Drip campaign

<div class="drip"><div class="timeline"><span>DAY 0</span><span>DAY 2</span><span>DAY 5</span></div><div class="messages"><div>WELCOME</div><div>HOW IT WORKS</div><div>TRY A FEATURE</div></div><div class="outcome" id="outcome">DAY 0 SENT</div></div>

.drip{width:min(93%,630px);font:800 clamp(10px,3.2vmin,15px)/1.2 var(--font-sans)}.timeline,.messages{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(4px,1.5vmin,12px)}.timeline{border-bottom:3px solid var(--line);padding-bottom:clamp(7px,2vmin,14px);color:var(--muted)}.timeline span{text-align:center}.messages{margin-top:clamp(8px,2vmin,16px)}.messages div{min-height:clamp(45px,13vmin,88px);display:grid;place-items:center;text-align:center;padding:3px;border:2px solid var(--line);color:var(--muted);transition:.3s}.messages div.sent{background:var(--accent);border-color:var(--accent);color:white}.messages div.cancelled{text-decoration:line-through;opacity:.5}.outcome{margin-top:clamp(10px,3vmin,23px);padding:clamp(7px,2vmin,15px);border:2px solid var(--fg);text-align:center}

let step=0;function show(){document.querySelectorAll('.messages div').forEach((el,i)=>{el.classList.toggle('sent',i<=step&&step<3);el.classList.toggle('cancelled',step===3&&i>0)});document.querySelector('#outcome').textContent=step===3?'CUSTOMER ACTED → STOP':'DAY '+[0,2,5][step]+' SENT';step=(step+1)%4}show();setInterval(show,1500);