.hidden{display:none!important}.quiz-shell{max-width:940px;padding-top:75px;padding-bottom:100px;min-height:75vh}.quiz-shell h1{font:700 clamp(36px,5vw,58px)/1.14 Outfit,sans-serif;letter-spacing:-.04em;margin:20px 0}.quiz-shell h1 span{color:#65dbe5}.quiz-intro{color:#a5bbd0;line-height:1.8;margin-bottom:38px}.mode-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.mode-card{background:linear-gradient(145deg,#1a3451,#112238);border:1px solid #3a5671;border-radius:19px;padding:33px;text-align:left;color:#eaf5ff;display:flex;flex-direction:column;align-items:flex-start;gap:16px;min-height:300px;cursor:pointer;font-family:inherit}.mode-card:hover,.mode-card:focus-visible{border-color:#63d7e6;transform:translateY(-3px)}.mode-symbol{font-size:45px;color:#75d3e5}.mode-card small{font-size:11px;letter-spacing:.13em;color:#83dce9;font-weight:800}.mode-card strong{font:600 25px/1.25 Outfit,sans-serif}.mode-card>span:not(.mode-symbol){color:#b1c4d6;font-size:14px;line-height:1.7}.mode-card em{font-style:normal;font-weight:800;color:#71e4e1;margin-top:auto}.quiz-panel{background:linear-gradient(145deg,#162d46,#102037);border:1px solid #36546d;border-radius:20px;padding:clamp(22px,4vw,42px)}.quiz-meta{display:flex;justify-content:space-between;color:#8ad9e8;font-size:11px;font-weight:800;letter-spacing:.1em}.progress{height:7px;border-radius:10px;background:#2b4157;margin:23px 0 32px;overflow:hidden}.progress span{display:block;width:0;height:100%;background:linear-gradient(90deg,#6b9fff,#5ae0d4);transition:width .2s}.quiz-panel h2{font:600 clamp(22px,3vw,33px)/1.35 Outfit,sans-serif;margin:16px 0 26px}.options{display:grid;gap:12px}.answer{width:100%;text-align:left;display:flex;align-items:center;gap:14px;background:#1b344d;border:1px solid #3c5872;border-radius:11px;color:#eaf5ff;padding:16px;cursor:pointer;font:600 14px/1.55 inherit}.answer:hover:not(:disabled){border-color:#8ed4ed}.answer:focus-visible{outline:2px solid #70e1db;outline-offset:2px}.answer.selected{border-color:#6bbaff;background:#224563}.answer.correct{border-color:#57e0b9;background:#173e45}.answer.wrong{border-color:#f3a3aa;background:#50303b}.answer:disabled{cursor:default}.letter{display:grid;place-items:center;flex:none;width:29px;height:29px;border:1px solid #59768f;border-radius:7px;font-weight:800;color:#9bd8ed}.feedback{border:1px solid #487a81;background:#173b46;border-radius:12px;margin-top:22px;padding:20px;color:#d9f3f3;line-height:1.7;font-size:14px}.feedback.bad{border-color:#a16a79;background:#412f3c}.feedback strong{display:block;margin-bottom:8px}.feedback small{display:block;margin-top:10px;color:#b4dbe5}.quiz-actions{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:30px}.quiz-actions button{cursor:pointer;font-family:inherit}.quiz-actions button:disabled{opacity:.4;cursor:not-allowed}.score{font:700 43px Outfit,sans-serif;color:#6de3d7;margin:10px 0}.quiz-panel h3{font:600 23px Outfit,sans-serif;margin:32px 0 15px}.chapter-row,.review-row{border:1px solid #38536b;border-radius:12px;padding:17px 19px;margin-top:11px;background:#1a324a}.chapter-row{display:flex;justify-content:space-between;gap:15px}.chapter-row span{color:#b1c6d8}.review-row strong{display:block;line-height:1.6}.review-row p{color:#bbcedc;font-size:13px;line-height:1.65;margin:10px 0}.review-row small{color:#87dce3}.review-state{font-size:11px;font-weight:800;color:#70e2c1;letter-spacing:.08em;margin-bottom:8px}.review-state.bad{color:#ffb3b3}.privacy{font-size:11px;color:#829ab0;margin-top:22px}.error{padding:20px;border:1px solid #e99aa4;background:#492d3b;border-radius:12px;margin-top:20px}@media(max-width:650px){.mode-grid{grid-template-columns:1fr}.quiz-shell{padding-top:48px}.quiz-actions .button{flex:1}.chapter-row{flex-direction:column}}

/* Distinción pedagógica entre modos */
.mode-hint{border-radius:11px;padding:13px 17px;margin-bottom:25px;font-size:13px;line-height:1.65;font-weight:600}
.hint-study{background:#153c3e;border:1px solid #347d7c;color:#b7f3e7}
.hint-exam{background:#292f50;border:1px solid #6871b6;color:#d5dcff}
.study-score{font-size:clamp(22px,3.6vw,33px);color:#a6e9e1}

.study-score{font-size:clamp(22px,3.5vw,34px);color:#a6e9e1}