:root{color-scheme:dark;--bg:#171918;--panel:#222622;--line:#454d45;--text:#f8f7f2;--muted:#c0c7bc;--accent:#e6ab7f}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:1rem/1.65 "Montserrat",Arial,Helvetica,sans-serif}
header,main,footer{max-width:1180px;margin:auto;padding:24px}header{display:flex;gap:28px;align-items:center;border-bottom:1px solid var(--line);flex-wrap:wrap}
header img{object-fit:contain;filter:brightness(0) invert(1)}header form{margin-left:auto}a{color:var(--accent);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}
h1{font-size:clamp(1.8rem,4vw,2.8rem);line-height:1.2;font-weight:500}h2{font-size:1.4rem}h3{font-size:1.1rem;margin:8px 0}p{color:var(--muted)}
.eyebrow{color:var(--accent);font-size:.875rem;letter-spacing:.08em}.card{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:28px;margin:22px 0}
.narrow{max-width:580px}.grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.grid .card{margin-bottom:0}
label{display:block;margin:16px 0;font-weight:600}input,select,textarea{display:block;width:100%;font:inherit;padding:12px;margin-top:6px;background:#161a16;color:var(--text);border:1px solid #7b8876;border-radius:5px}
textarea{resize:vertical}button,.button-link{font:inherit;font-weight:600;background:var(--accent);color:#171918;border:1px solid var(--accent);padding:12px 20px;border-radius:5px;cursor:pointer;text-decoration:none;display:inline-block}
button:hover,.button-link:hover{background:#f3c39f}.secondary{background:transparent;color:var(--text);border-color:#7b8876}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}
.message{border:1px solid #8ea47d;background:#273924;padding:18px;color:var(--text);border-radius:6px}.error{background:#422520;border-color:#db907f}
.courses{list-style:none;padding:0}.courses li{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding:18px 0}
.lesson{overflow-wrap:anywhere;padding:16px 0;line-height:1.9}.table-scroll{overflow:auto}table{width:100%;border-collapse:collapse}th,td{text-align:left;border-bottom:1px solid var(--line);padding:12px;vertical-align:top}th{color:var(--accent)}
summary{cursor:pointer;font-size:1.1rem}footer{color:var(--muted);border-top:1px solid var(--line)}
.muted{opacity:.72}.tag{display:inline-block;font-size:.8rem;font-weight:600;opacity:.9;margin-bottom:8px}.pass{font-weight:600}.fail{font-weight:600}

/* Presentación y revisión de exámenes */
.test{max-width:900px;margin:auto;padding:28px}.q{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:24px;margin:20px 0}.q h2{font-size:18px;font-weight:500}.opt{display:block;border:1px solid #65705f;border-radius:7px;padding:12px 15px;margin:10px 0;cursor:pointer}.opt:hover{border-color:var(--accent)}.opt input{display:inline-block;width:auto;margin:0 10px 0 0}.result{padding:24px;border:1px solid #8ea47d;background:#273924;border-radius:10px}.result.fail{background:#422520;border-color:#db907f}.bar{position:sticky;bottom:0;background:#171918ed;padding:18px 0;backdrop-filter:blur(10px)}
.rev-wrap{max-width:900px;margin:auto;padding:28px}.rev-q{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:20px;margin:18px 0}.rev-q h2{font-size:17px;font-weight:500}.rev-opt{padding:10px 14px;border-radius:6px;margin:8px 0;border:1px solid var(--line)}.rev-opt.correct{border-color:#8ea47d;background:#1c2419}.rev-opt.wrong{border-color:#db907f;background:#241a18}.rev-open{white-space:pre-wrap;overflow-wrap:anywhere;background:#161a16;border:1px solid var(--line);border-radius:6px;padding:14px;margin-top:8px;line-height:1.7}.review-fields{display:grid;grid-template-columns:minmax(180px,.45fr) 1fr;gap:18px;margin-top:18px}.review-fields label{margin:0}.review-submit{position:sticky;bottom:0;background:#171918ed;padding:18px 0;backdrop-filter:blur(10px)}.review-summary{margin-top:18px}

/* Estados y liga privada de resultados */
.status{display:flex;flex-direction:column;gap:4px;border:1px solid var(--line);border-radius:8px;padding:16px 18px;margin:18px 0;color:var(--text)}.status span{color:var(--muted);font-size:.94rem}.status.pending{background:#3b3420;border-color:#c39b4c}.status.pass{background:#273924;border-color:#8ea47d}.status.fail{background:#422520;border-color:#db907f}.result-number{font-size:clamp(2.5rem,8vw,4.7rem);line-height:1;margin:24px 0;color:var(--text);font-weight:600}.actions-row{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-top:24px}.exam-status{display:flex;flex-direction:column;align-items:flex-end;gap:4px;text-align:right}.exam-status small{color:var(--muted)}
.public-main{max-width:1060px}.tracking-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:24px;align-items:start}.tracking-card{margin-top:22px}.qr-card{text-align:center}.qr-frame{display:inline-grid;place-items:center;background:#fff;border-radius:12px;padding:14px;margin:8px auto 16px}.qr-image{display:block;width:min(256px,100%);height:auto}.tracking-url{overflow-wrap:anywhere;background:#161a16;border:1px solid var(--line);border-radius:7px;padding:12px;text-align:left;font-size:.9rem}.privacy-note{font-size:.88rem}.tracking-url a{word-break:break-all}

/* Clases compartidas por el panel de exámenes */
.exam-wrap{max-width:1180px;margin:auto;padding:24px}.exam-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.exam-card{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:28px;margin:22px 0}.exam-card label{display:block;margin:16px 0;font-weight:600}.exam-card input,.exam-card select,.exam-card textarea{display:block;width:100%;box-sizing:border-box;font:inherit;padding:12px;margin-top:6px;background:#161a16;color:var(--text);border:1px solid #7b8876;border-radius:5px}.exam-card textarea{resize:vertical}.exam-list{list-style:none;padding:0}.exam-list li{border-top:1px solid var(--line);padding:16px 0;display:flex;justify-content:space-between;gap:20px}.msg{padding:16px;border-radius:6px;background:#273924;border:1px solid #8ea47d}.err{background:#422520;border-color:#db907f}.preview-q{border-top:1px solid var(--line);padding-top:16px;margin-top:16px}.preview-q:first-child{border-top:none;padding-top:0;margin-top:0}.preview-opts{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}.q-head{display:flex;justify-content:space-between;align-items:center;gap:12px}.q-head button{padding:6px 14px;font-size:.85rem}.preview-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}

@media(max-width:740px){.grid,.exam-grid,.tracking-grid,.review-fields{grid-template-columns:1fr;gap:0}.card,.exam-card{padding:20px}header,main,footer,.test,.rev-wrap,.exam-wrap{padding:18px}.courses li,.exam-list li{align-items:flex-start;flex-direction:column;gap:4px}.preview-opts{grid-template-columns:1fr}.exam-status{align-items:flex-start;text-align:left}.qr-card{margin-top:0}}