:root{color:#0f172a;background:#f8fafc;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}*{box-sizing:border-box}body{margin:0}a{color:#0f766e}.app-shell{min-height:100vh}.app-nav{display:flex;gap:1rem;padding:1rem 1.5rem;border-bottom:1px solid #e2e8f0;background:#fff}.app-nav a{text-decoration:none;color:#334155;font-weight:600}.app-nav a.active{color:#0f766e}.page{max-width:920px;margin:0 auto;padding:2rem 1.5rem}.page__header{display:flex;justify-content:space-between;gap:1rem;align-items:flex-start;margin-bottom:1.5rem}.eyebrow{text-transform:uppercase;letter-spacing:.08em;color:#64748b;font-size:.75rem;margin:0 0 .35rem}