/* BTQ Matrix Test — frontend */
.btq-mx{--ink:#141733;--accent:#2F49F0;--mark:#FF2D55;--line:#D8DDF0;--soft:#EDF0FA;--muted:#5a5f85;max-width:860px;margin:0 auto;padding:8px 12px 32px;color:var(--ink);font-family:Lexend,Archivo,"Segoe UI",Arial,sans-serif;box-sizing:border-box}
.btq-mx *{box-sizing:border-box}
.btq-mx .btq-svg{display:block;width:100%;height:auto}
.btq-mx-btn{display:inline-block;background:var(--accent);color:#fff;border:0;border-radius:12px;padding:14px 26px;font-size:17px;font-weight:700;cursor:pointer;text-decoration:none;line-height:1.2}
.btq-mx-btn:hover{filter:brightness(1.08);color:#fff}
.btq-mx-btn:disabled{opacity:.6;cursor:default}
.btq-mx-btn-ghost{background:#fff;color:var(--accent);border:2px solid var(--accent)}
.btq-mx-note{color:var(--muted);font-size:13.5px;line-height:1.55;margin:14px 0 0}
/* start */
.btq-mx-start{text-align:center;background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px 22px}
.btq-mx-start p{font-size:16px;line-height:1.65;max-width:600px;margin:0 auto 20px}
.btq-mx-start-meta{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.btq-mx-start-meta span{background:var(--soft);border-radius:999px;padding:6px 14px;font-size:13.5px;font-weight:600;color:var(--accent)}
/* test */
.btq-mx-head{display:flex;justify-content:space-between;align-items:center;margin:0 0 8px}
.btq-mx-q{font-size:17px}
.btq-mx-q b{font-size:22px}
.btq-mx-clock{font-variant-numeric:tabular-nums;font-size:18px;font-weight:700;background:var(--soft);border-radius:999px;padding:6px 14px}
.btq-mx-clock.warn{background:#FFF4F6;color:var(--mark)}
.btq-mx-progress{height:6px;background:var(--soft);border-radius:999px;overflow:hidden;margin-bottom:18px}
.btq-mx-progress i{display:block;height:100%;background:var(--accent);transition:width .3s}
.btq-mx-stage{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start}
.btq-mx-matrix{background:#fff;border:1px solid var(--line);border-radius:16px;padding:12px}
.btq-mx-options{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.btq-mx-opt{position:relative;background:#fff;border:2px solid var(--line);border-radius:12px;padding:6px 6px 22px;cursor:pointer;transition:border-color .15s,transform .15s}
.btq-mx-opt:hover{border-color:var(--accent);transform:translateY(-2px)}
.btq-mx-opt span{position:absolute;left:0;right:0;bottom:4px;text-align:center;font-size:13px;color:var(--muted)}
.btq-mx-foot{margin-top:16px;text-align:center}
.btq-mx-skip{background:none;border:1px solid var(--line);border-radius:999px;padding:8px 18px;color:var(--muted);cursor:pointer;font-size:14px}
.btq-mx-skip:hover{border-color:var(--muted);color:var(--ink)}
@media (max-width:640px){.btq-mx-stage{grid-template-columns:1fr}.btq-mx-matrix{max-width:340px;margin:0 auto}.btq-mx-options{max-width:340px;margin:0 auto;width:100%}}
/* age */
.btq-mx-agewrap{text-align:center;background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px 18px}
.btq-mx-agetitle{font-size:22px;font-weight:700;margin-bottom:18px}
.btq-mx-agetitle small{display:block;font-size:13px;color:var(--muted);font-weight:500;margin-bottom:4px}
.btq-mx-ages{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;max-width:520px;margin:0 auto}
.btq-mx-age{background:var(--soft);border:2px solid transparent;border-radius:12px;padding:14px 8px;font-size:16px;font-weight:600;cursor:pointer;color:var(--ink)}
.btq-mx-age:hover{border-color:var(--accent)}
.btq-mx-age:disabled{opacity:.5}
@media (max-width:480px){.btq-mx-ages{grid-template-columns:repeat(2,1fr)}}
/* result */
.btq-mx-result-page{padding-top:24px}
.btq-mx-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px 22px;margin-bottom:20px}
.btq-mx-center{text-align:center}
.btq-mx-kicker{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.btq-mx-iq{font-size:72px;font-weight:800;line-height:1.05;color:var(--accent);margin:6px 0 2px}
.btq-mx-label{font-size:20px;font-weight:700;margin-bottom:10px}
.btq-mx-bell{width:100%;max-width:520px;height:auto;margin:6px auto 14px;display:block}
.btq-mx-stats{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin:8px 0 4px}
.btq-mx-stats div{background:var(--soft);border-radius:12px;padding:12px 16px;min-width:130px}
.btq-mx-stats b{display:block;font-size:22px}
.btq-mx-stats span{font-size:12.5px;color:var(--muted)}
.btq-mx-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:18px}
.btq-mx-card h2{font-size:20px;margin:0 0 14px}
.btq-mx-review{border-top:1px solid var(--line);padding:16px 0}
.btq-mx-review-head{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.btq-mx-review-head span{color:var(--muted);font-size:14px}
.btq-mx-review-body{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
.btq-mx-rule{margin-top:10px;font-size:14px;color:var(--muted);line-height:1.5}
@media (max-width:640px){.btq-mx-review-body{grid-template-columns:1fr}.btq-mx-iq{font-size:58px}}
/* v0.2: khoảng tin cậy + cảnh báo */
.btq-mx-ci{font-size:15px;color:var(--muted);margin:-4px 0 8px}
.btq-mx-ci b{color:var(--ink)}
.btq-mx-warn{background:#FFF4F6;border:1px solid #FFD3DC;color:#8a1c33;border-radius:12px;padding:10px 14px;font-size:14px;line-height:1.5;margin:0 0 14px;text-align:left}
.btq-mx-center .btq-mx-warn{text-align:center;margin-top:12px}
/* v0.3: báo lỗi câu + góp ý */
.btq-mx-foot{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.btq-mx-flag{background:none;border:1px dashed var(--line);border-radius:999px;padding:8px 14px;color:var(--muted);cursor:pointer;font-size:13px}
.btq-mx-flag:hover{border-color:var(--mark);color:var(--mark)}
.btq-mx-flag.on{border-style:solid;border-color:var(--mark);color:var(--mark);background:#FFF4F6}
.btq-mx-fb h2{text-align:center}
.btq-mx-fb-q{color:var(--muted);font-size:14px;text-align:center;margin:0 0 16px}
.btq-mx-fb-row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:10px 0;border-top:1px solid var(--line)}
.btq-mx-fb-row>span{font-weight:600;font-size:15px}
.btq-mx-stars{display:flex;gap:4px}
.btq-mx-star{background:none;border:0;font-size:30px;line-height:1;color:#D8DDF0;cursor:pointer;padding:0 2px}
.btq-mx-star.on{color:#F5B301}
.btq-mx-fb-opts{display:flex;gap:8px}
.btq-mx-fb-opt{background:var(--soft);border:2px solid transparent;border-radius:999px;padding:8px 16px;font-weight:600;cursor:pointer;color:var(--ink)}
.btq-mx-fb-opt.on{border-color:var(--accent);color:var(--accent);background:#fff}
.btq-mx-fb-text{width:100%;min-height:90px;border:1px solid var(--line);border-radius:12px;padding:12px;font:inherit;font-size:14px;margin-top:12px;resize:vertical}
/* v0.4.1: nút trang kết quả đồng cỡ (chống style button của theme), nút chia sẻ Facebook */
.btq-mx .btq-mx-actions .btq-mx-btn,.btq-mx button.btq-mx-btn,.btq-mx a.btq-mx-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;box-sizing:border-box;min-height:0;height:auto;margin:0;padding:14px 24px;line-height:1.2;font-size:16px;font-weight:700;text-transform:none;letter-spacing:0;border-radius:12px;box-shadow:none;text-decoration:none}
.btq-mx a.btq-mx-btn-ghost,.btq-mx .btq-mx-btn-ghost{padding:12px 22px;border:2px solid var(--accent);background:#fff;color:var(--accent)}
.btq-mx .btq-mx-btn-fb{background:#1877F2;color:#fff}
.btq-mx .btq-mx-btn-fb:hover{background:#1466d6;color:#fff}
.btq-mx .btq-mx-btn-fb svg{width:18px;height:18px;fill:currentColor;flex:none}