Astro Advanced Routing

<section class="stage"><div class="heading">ADVANCED ROUTING <span class="hint">request pipeline</span></div><div class="pipeline-steps"><div class="request-chip">REQUEST</div><div class="step-chip">AUTH</div><div class="step-chip">ACTIONS</div><div class="step-chip">PAGE</div></div><div class="route-result" id="route-result">Request enters src/fetch.ts</div><div class="caption">Compose stages before the page responds</div></section>

.stage{width:min(94vw,780px);height:min(88vh,322px);padding:clamp(12px,3vmin,20px);border:1px solid var(--line);border-radius:16px;background:var(--surface);box-shadow:0 12px 36px #0001;display:flex;flex-direction:column;gap:clamp(7px,2vmin,14px);font:500 clamp(12px,3.5vmin,17px)/1.3 var(--font-sans,system-ui,sans-serif);overflow:hidden}.heading{display:flex;justify-content:space-between;align-items:center;gap:8px;font-weight:750;color:var(--accent)}.hint{color:var(--muted);font-size:clamp(12px,3.2vmin,14px);font-weight:500}.caption{margin-top:auto;color:var(--muted);font-size:clamp(12px,3.2vmin,14px)}.row{display:flex;gap:clamp(5px,1.5vmin,12px);align-items:center}.tile{padding:clamp(6px,1.8vmin,13px);border:1px solid var(--line);border-radius:9px;background:var(--bg);text-align:center;min-width:0}.arrow{color:var(--accent);font-weight:800}.stage [data-on]{transition:background .3s,border-color .3s,opacity .3s,transform .3s}.stage .on{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,var(--surface));color:var(--accent)}.pipeline-steps{flex:1;display:flex;align-items:center;justify-content:center;gap:clamp(3px,1.2vmin,10px)}.request-chip,.step-chip{flex:1;max-width:150px;min-width:0;border:1px solid var(--line);border-radius:8px;padding:clamp(5px,1.5vmin,10px) 2px;text-align:center;background:var(--bg);font-weight:700;font-size:clamp(12px,3vmin,15px)}.request-chip{color:var(--accent)}.step-chip.current{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 18%,var(--surface))}.route-result{text-align:center;color:var(--accent-2);font-weight:700;font-size:clamp(12px,3vmin,15px)}.stage small,.stage button,.stage .cards b,.stage .phase b,.stage .pair b,.stage .tree-mini b{font-size:clamp(12px,3.2vmin,14px)!important}

const chips=[...document.querySelectorAll(".step-chip")],result=document.getElementById("route-result"),labels=["Auth checks the request","Actions run after auth","Page renders the response"];let step=0;function tick(){chips.forEach((chip,i)=>chip.classList.toggle("current",i===step));result.textContent=labels[step];step=(step+1)%3}tick();const timer=setInterval(tick,900);document.querySelector(".stage").addEventListener("pointerdown",()=>{clearInterval(timer);tick()})