:root{--gap:12px}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,Arial,sans-serif}
.container{max-width:1100px;margin:0 auto;padding:16px}
.header, .footer{padding:12px 16px;border-bottom:1px solid #eee}
.footer{border-top:1px solid #eee;border-bottom:none;color:#666;font-size:.9rem}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:var(--gap)}
label{display:flex;flex-direction:column;gap:6px}
input,button{padding:10px 12px}
.btn{cursor:pointer}
.card{border:1px solid #e5e7eb;border-radius:10px;padding:12px}
.alert{margin-top:12px;padding:12px;border:1px solid #ddd;border-radius:8px;background:#f8fafc}
.nav a{margin-right:12px;text-decoration:none;color:#111}