/* rb retention add-on (draft). Uses the site's CSS variables; mobile-first; no libraries. */
.rbr-box{background:var(--card,#fff);border:1px solid var(--line,#e3e6ef);border-radius:var(--r,18px);padding:18px;margin:16px auto;max-width:1100px;color:var(--tx,#0e1222);box-sizing:border-box}
.rbr-box h2,.rbr-box h3{margin:0 0 6px;font-size:1.15rem}
.rbr-k{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--a1,#5b3df5);margin-bottom:6px}
.rbr-mu{color:var(--mu,#4a5168);font-size:.92rem;margin:4px 0}
.rbr-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.rbr-streak{display:inline-flex;align-items:center;gap:6px;font-weight:800;background:rgba(245,158,11,.16);color:#b45309;border:1px solid rgba(245,158,11,.45);border-radius:999px;padding:6px 14px;font-size:1rem}
[data-theme=dark] .rbr-streak{color:#fbbf24}
.rbr-q{font-weight:600;margin:10px 0}
.rbr-opts{display:flex;flex-direction:column;gap:8px;margin:0;padding:0;list-style:none}
.rbr-opt{width:100%;text-align:left;font:inherit;padding:12px 14px;border-radius:12px;border:1px solid var(--line,#e3e6ef);background:var(--bg2,#fff);color:inherit;cursor:pointer;min-height:44px}
.rbr-opt:hover{border-color:var(--a1,#5b3df5)}
.rbr-opt.ok{border-color:#16a34a;background:rgba(22,163,74,.1)}
.rbr-opt.no{border-color:#dc2626;background:rgba(220,38,38,.08)}
.rbr-opt[disabled]{cursor:default}
.rbr-res{margin-top:12px;padding:12px;border-radius:12px;background:var(--bg,#f7f8fc)}
.rbr-btn{display:inline-block;padding:10px 18px;border-radius:999px;background:var(--grad,linear-gradient(135deg,#5b3df5,#0891b2));color:#fff!important;text-decoration:none;font-weight:700;border:0;cursor:pointer;font:inherit;font-weight:700}
.rbr-btn.sec{background:transparent;color:var(--a1,#5b3df5)!important;border:1px solid var(--line,#e3e6ef)}
.rbr-bar{height:10px;border-radius:99px;background:var(--line,#e3e6ef);overflow:hidden;margin:10px 0}
.rbr-bar i{display:block;height:100%;background:var(--grad,linear-gradient(135deg,#5b3df5,#0891b2))}
.rbr-cont{border-width:2px;border-color:var(--a1,#5b3df5)}
.rbr-badges{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:10px}
@media(min-width:700px){.rbr-badges{grid-template-columns:repeat(4,1fr)}}
.rbr-badge{border:1px solid var(--line,#e3e6ef);border-radius:14px;padding:12px;text-align:center;font-size:.88rem}
.rbr-badge b{display:block;font-size:1.6rem;line-height:1.2}
.rbr-badge.off{opacity:.45;filter:grayscale(1)}
.rbr-table{width:100%;border-collapse:collapse;font-size:.9rem}
.rbr-table td,.rbr-table th{padding:8px 6px;border-bottom:1px solid var(--line,#e3e6ef);text-align:left}
.rbr-ex{background:#fef3c7;color:#92400e;border:1px dashed #d97706;border-radius:10px;padding:6px 10px;font-weight:700;font-size:.85rem;margin-bottom:10px}
.rbr-steps{margin:8px 0;padding-left:20px}.rbr-steps li{margin:4px 0}
.rbr-form label{display:block;margin:10px 0 4px;font-weight:600}
.rbr-form input[type=text]{width:100%;max-width:360px;padding:10px;border-radius:10px;border:1px solid var(--line,#e3e6ef);background:var(--bg2,#fff);color:inherit;font:inherit;box-sizing:border-box}
.rbr-form .chk{display:flex;gap:8px;align-items:flex-start;font-weight:400}
.rbr-score{font-weight:700}