:root{--brand:#0057ff;--bg:#ffffff;--text:#222;--muted:#666;--max-width:1100px;--gap:1rem}
*{box-sizing:border-box}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial,sans-serif;margin:0;color:var(--text);background:var(--bg);line-height:1.45}
.container{max-width:var(--max-width);margin:0 auto;padding:1rem}
.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.site-header{background:#f8f9fb;border-bottom:1px solid #eee}
.logo{font-weight:700;color:var(--brand);text-decoration:none}
.site-nav{display:flex;align-items:center}
.nav-list{list-style:none;margin:0;padding:0;display:flex;gap:1rem}
.nav-toggle{display:none}
.hero{padding:3rem 0;background:linear-gradient(180deg,#fff,#f7fbff)}
.hero h1{margin-top:0}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}
.card{padding:1rem;border-radius:6px;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.product-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}
.product-card img{width:100%;height:auto;border-radius:4px}
.site-footer{background:#fafafa;padding:1rem;border-top:1px solid #eee;text-align:center}
.btn{display:inline-block;padding:0.6rem 1rem;background:var(--brand);color:#fff;border-radius:4px;text-decoration:none}
.btn-secondary{background:#e6f0ff;color:var(--brand)}
@media(max-width:768px){.nav-list{display:none}.nav-toggle{display:inline-block}}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.hidden{position:absolute;left:-9999px}
.heading{margin:0}
