feat: scaffold astro publishing pipeline

public/hands-on/starter/styles.css

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+:root{--paper:#f4f3ef;--ink:#173044;--muted:#687d8c;--blue:#5683a1;--gold:#efc86d;--line:#d5dde1}*{box-sizing:border-box}body{margin:0;min-width:320px;background:var(--paper);color:var(--ink);font-family:Arial,sans-serif}main{width:min(880px,calc(100% - 40px));margin:0 auto;padding:70px 0}header,.section-head{display:flex;justify-content:space-between;gap:30px;align-items:end}header{padding-bottom:50px;border-bottom:1px solid var(--line)}header span,.task-meta{font:10px monospace;letter-spacing:.08em}h1{margin:12px 0 0;font-size:clamp(48px,10vw,100px);letter-spacing:-.08em}header p{max-width:220px;color:var(--muted);line-height:1.5}section{padding-top:45px}h2{font-size:24px}.section-head>span{color:var(--blue);font:11px monospace}.task-list{display:grid;gap:1px;background:var(--line);border:1px solid var(--line)}.task{display:grid;grid-template-columns:1fr auto;gap:20px;padding:22px;background:var(--paper)}.task h3{margin:0 0 8px;font-size:17px}.task p{margin:0;color:var(--muted);font-size:13px}.task-meta{align-self:center;padding:7px 9px;color:var(--ink);background:var(--gold)}.task[data-status="done"] .task-meta{color:var(--paper);background:var(--blue)}@media(max-width:560px){header{display:block}header p{margin-top:24px}.task{grid-template-columns:1fr}.task-meta{justify-self:start}}