body{font-family:system-ui,sans-serif;margin:0;background:#f8fafc;color:#1e293b}button{padding:12px 20px;border:none;border-radius:8px;cursor:pointer;font-weight:500;transition:all .15s ease}.btn-primary{background:#3b82f6;color:#fff}.btn-primary:hover{background:#2563eb}.container{max-width:400px;margin:100px auto;padding:20px}.card{background:#fff;border-radius:12px;padding:32px;box-shadow:0 4px 6px -1px #0000001a}