body{font-family:system-ui,Arial,sans-serif;margin:20px}
.container{max-width:900px;margin:0 auto}
.card{border:1px solid #ddd;border-radius:12px;padding:16px;margin:12px 0}
.btn{display:inline-block;padding:10px 14px;border-radius:10px;border:1px solid #111;text-decoration:none;color:#111}
.btn-primary{background:#111;color:#fff}
.small{color:#666;font-size:.9rem}
.option{margin:10px 0}