body{font-family:Arial,sans-serif;background:#f5f7fb;margin:0;color:#222}
header{background:#0d6efd;color:#fff;padding:20px;text-align:center}
nav a{color:#fff;text-decoration:none;margin:0 10px}
.container{max-width:1000px;margin:auto;padding:30px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.card{background:#fff;padding:20px;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,.08)}
.btn{display:inline-block;background:#0d6efd;color:#fff;padding:10px 14px;border-radius:5px;text-decoration:none}
input{width:100%;padding:8px;margin:6px 0}
button{padding:10px 16px}
footer{text-align:center;padding:20px}