html{box-sizing:border-box;font-size:16px}html.font-size-small{font-size:14px}html.font-size-normal{font-size:16px}html.font-size-large{font-size:18px}*,*:before,*:after{box-sizing:inherit}:root{--background-color: #0a192f;--sidebar-bg: #112240;--text-primary: #ccd6f6;--text-secondary: #8892b0;--accent-color: #64ffda;--accent-color-dark: #13bba4;--card-bg: #112240;--border-color: #233554;--input-bg: #0a192f;--correct-color: #28a745;--incorrect-color: #dc3545;--user-message-bg: #2a4c7c;--font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif}[data-theme=light]{--background-color: #f0f2f5;--sidebar-bg: #ffffff;--text-primary: #050505;--text-secondary: #55585f;--accent-color: #0062E3;--accent-color-dark: #0052D1;--card-bg: #ffffff;--border-color: #d8dde4;--input-bg: #e4e6eb;--user-message-bg: #0084ff}html,body{height:100%;margin:0;padding:0;font-family:var(--font-sans);background-color:var(--background-color);color:var(--text-primary);overflow-x:hidden;transition:background-color .3s,color .3s}h1,h2,h3,h4,h5,h6{color:var(--text-primary)}a{color:var(--accent-color);text-decoration:none;transition:color .2s}a:hover{text-decoration:underline}.app-button{background-color:var(--accent-color);color:#0a192f;border:1px solid var(--accent-color);padding:.75rem 1.5rem;border-radius:6px;cursor:pointer;font-size:1rem;font-weight:600;transition:background-color .2s,color .2s,border-color .2s;display:inline-flex;align-items:center;justify-content:center;gap:.5rem}.app-button:hover{background-color:var(--accent-color-dark);border-color:var(--accent-color-dark)}.app-button.secondary{background-color:transparent;color:var(--accent-color)}.app-button.secondary:hover{background-color:#64ffda1a}.app-button.small{padding:.5rem 1rem;font-size:.9rem}.app-button:disabled{background-color:var(--text-secondary);border-color:var(--text-secondary);color:var(--background-color);cursor:not-allowed;opacity:.6}[data-theme=light] .app-button{color:#fff}[data-theme=light] .app-button.secondary{color:var(--accent-color)}#course-selection-modal{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#000000b3;display:flex;justify-content:center;align-items:center;z-index:1000;color:var(--text-primary);-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}#course-selection-modal.hidden{display:none}#course-selection-modal .modal-content{background-color:var(--sidebar-bg);padding:40px;border-radius:12px;text-align:center;max-width:500px;width:90%;box-shadow:0 5px 15px #0000004d;border:1px solid var(--border-color)}#course-selection-modal h2{margin-top:0;font-size:1.8em;color:var(--accent-color)}#course-selection-modal p{margin-bottom:30px;font-size:1.1em;color:var(--text-secondary)}#course-selection-modal .course-buttons{display:flex;flex-direction:column;gap:15px}#course-selection-modal button{background-color:transparent;color:var(--accent-color);border:1px solid var(--accent-color);padding:15px 20px;border-radius:8px;font-size:1.1em;font-weight:600;cursor:pointer;transition:background-color .3s ease,color .3s ease}#course-selection-modal button:hover{background-color:var(--accent-color);color:var(--background-color)}::-webkit-scrollbar{width:10px}::-webkit-scrollbar-track{background:var(--background-color)}::-webkit-scrollbar-thumb{background:var(--text-secondary);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--accent-color)}#app-container{display:flex;height:100vh;width:100%;position:relative}#sidebar{width:240px;flex-shrink:0;background-color:var(--sidebar-bg);border-right:1px solid var(--border-color);display:flex;flex-direction:column}.sidebar-header{padding:1.5rem;border-bottom:1px solid var(--border-color)}.sidebar-header h1{margin:0 0 .75rem;font-size:1.25rem;color:var(--text-primary);font-weight:600}.change-course-button{background-color:transparent;color:var(--accent-color);border:1px solid var(--accent-color);padding:.5rem 1rem;border-radius:6px;font-size:.8rem;cursor:pointer;width:100%;transition:background-color .2s,color .2s}.change-course-button:hover{background-color:var(--accent-color);color:var(--background-color)}.nav-list{list-style:none;padding:1rem 0;margin:0;flex-grow:1}.nav-item{display:flex;align-items:center;padding:.8rem 1.5rem;cursor:pointer;color:var(--text-secondary);transition:background-color .2s,color .2s;border-left:3px solid transparent}.nav-item:hover{background-color:#64ffda1a;color:var(--accent-color)}.nav-item.active{color:var(--accent-color);border-left-color:var(--accent-color);background-color:#64ffda1a}[data-theme=light] .nav-item:hover,[data-theme=light] .nav-item.active{background-color:#0062e31a}.nav-item svg{width:24px;height:24px;margin-right:1rem}.nav-item span{font-size:1rem;font-weight:500}#user-session{padding:1rem 1.5rem;border-top:1px solid var(--border-color);font-size:.9rem;color:var(--text-secondary);margin-top:auto}.user-info{font-weight:700;color:var(--text-primary);margin-bottom:.75rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}#user-session #logout-button{width:100%}#settings-menu-wrapper{position:relative;flex-shrink:0}#settings-toggle-btn{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:.25rem;border-radius:50%;display:flex;justify-content:center;align-items:center;transition:color .2s,background-color .2s}#settings-toggle-btn:hover{color:var(--accent-color);background-color:var(--border-color)}#settings-toggle-btn svg{width:24px;height:24px}#settings-menu{position:absolute;top:calc(100% + 10px);right:0;width:200px;background-color:var(--background-color);border:1px solid var(--border-color);border-radius:8px;box-shadow:0 5px 15px #0000004d;z-index:1002;padding:.5rem;transition:opacity .2s,visibility .2s}#settings-menu.hidden{opacity:0;visibility:hidden}#settings-menu h4{font-size:.8rem;color:var(--text-secondary);margin:0 .5rem .5rem;text-transform:uppercase;font-weight:600}.setting-item{display:flex;justify-content:space-between;align-items:center;padding:.5rem;font-size:.9rem}.setting-item span{color:var(--text-primary)}#theme-toggle{background:var(--input-bg);border:1px solid var(--border-color);color:var(--text-secondary);cursor:pointer;padding:.3rem;border-radius:6px;display:flex}#theme-toggle svg{width:20px;height:20px}#font-size-controls{display:flex;gap:.25rem;background:var(--input-bg);border:1px solid var(--border-color);border-radius:6px;padding:2px}#font-size-controls button{background:none;border:none;color:var(--text-secondary);cursor:pointer;border-radius:4px;width:28px;height:28px;transition:background-color .2s,color .2s}#font-size-controls button:hover{background-color:var(--border-color)}#font-size-controls button.active{background-color:var(--accent-color);color:var(--background-color)}[data-theme=light] #font-size-controls button.active{color:#fff}#font-size-controls button[data-size=small]{font-size:.7rem}#font-size-controls button[data-size=normal]{font-size:.9rem}#font-size-controls button[data-size=large]{font-size:1.1rem}#view-container{display:flex;flex-direction:column;flex-grow:1;overflow:hidden;position:relative}#app-header{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1rem 2rem;border-bottom:1px solid var(--border-color);flex-shrink:0;min-height:73px;background-color:var(--sidebar-bg)}.header-controls{display:flex;align-items:center;gap:1.5rem;flex-shrink:0}#view-title{color:var(--accent-color);font-size:1.8rem;margin:0;display:flex;align-items:center;gap:1rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.header-back-button{font-size:.9rem!important}#main-content{flex-grow:1;overflow-y:auto;padding:2rem;padding-bottom:70px;display:flex;flex-direction:column;position:relative}#chat-wrapper{position:fixed;bottom:0;left:0;right:0;width:100%;height:70vh;max-height:500px;z-index:1000;border-left:none;border-top:1px solid var(--border-color);transform:translateY(calc(100% - 48px));transition:transform .3s ease-in-out;display:flex;flex-direction:column;background-color:var(--background-color)}#chat-wrapper.expanded{transform:translateY(0)}#chat-header{flex-shrink:0;padding:.75rem 1rem;color:var(--accent-color);font-weight:700;border-bottom:1px solid var(--border-color);display:flex;align-items:center;gap:.5rem;font-size:.9rem;cursor:pointer;background-color:var(--sidebar-bg)}#chat-header svg{width:20px;height:20px}#chat-toggle-button{margin-left:auto;background:none;border:none;color:var(--text-secondary);padding:0;cursor:pointer;display:flex;align-items:center}#chat-toggle-button svg{width:24px;height:24px;transition:transform .3s ease}#chat-wrapper.expanded #chat-toggle-button svg{transform:rotate(180deg)}#chat-container{flex-grow:1;overflow-y:auto;padding:1rem;display:flex;flex-direction:column;gap:1rem}#chat-form{display:flex;gap:.5rem;padding:1rem;border-top:1px solid var(--border-color);background-color:var(--sidebar-bg);flex-shrink:0}#message-input{flex-grow:1;background-color:var(--background-color);border:1px solid var(--border-color);border-radius:20px;padding:.5rem 1rem;color:var(--text-primary);font-size:.9rem}#message-input:focus{outline:none;border-color:var(--accent-color)}#send-button{background-color:var(--accent-color);color:var(--background-color);border:none;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background-color .2s ease;width:36px;height:36px;flex-shrink:0}[data-theme=light] #send-button{color:#fff}#send-button:hover{background-color:var(--accent-color-dark)}#send-button:disabled{background-color:var(--text-secondary);cursor:not-allowed}#stats-widget{display:flex;gap:1.5rem;color:var(--text-secondary);flex-shrink:0}.stat-item{display:flex;align-items:center;gap:.5rem;font-size:.9rem}.stat-item svg{width:18px;height:18px}.stat-item strong{color:var(--text-primary);font-weight:600}@media (max-width: 768px){body,html{overflow:auto}#app-container{flex-direction:column;height:auto;min-height:100vh;overflow:visible}#sidebar{width:100%;flex-direction:row;border-right:none;border-bottom:1px solid var(--border-color);height:auto;flex-shrink:0;z-index:10;position:sticky;top:0;background:var(--sidebar-bg)}.sidebar-header,#user-session{display:none}.nav-list{display:flex;flex-grow:1;justify-content:space-around;padding:0}.nav-item{border-left:none;border-bottom:3px solid transparent;padding:.75rem .25rem;flex-direction:column;gap:.25rem;flex-grow:1;justify-content:center;font-size:.9rem}.nav-item.active{border-left-color:transparent;border-bottom-color:var(--accent-color)}.nav-item svg{margin-right:0;width:20px;height:20px}.nav-item span{font-size:.65rem}#view-container{height:auto;flex-grow:1;overflow:visible}#main-content{padding:1rem;padding-bottom:70px}#app-header{padding:.75rem 1rem;min-height:0}#view-title{font-size:1.3rem}#stats-widget{display:none}}select{background-color:var(--sidebar-bg);color:var(--text-primary);border:1px solid var(--border-color);border-radius:6px;padding:.75rem 1rem;font-size:1rem;font-family:var(--font-sans)}select option{background-color:var(--sidebar-bg);color:var(--text-primary);padding:.5rem}select:focus{outline:none;border-color:var(--accent-color)}#topic-select{background-color:var(--sidebar-bg)!important;color:var(--text-primary)!important;border:1px solid var(--border-color)!important}#topic-select option{background-color:var(--sidebar-bg)!important;color:var(--text-primary)!important}[data-theme=light] select{background-color:var(--sidebar-bg);color:var(--text-primary);border:1px solid var(--border-color)}[data-theme=light] select option{background-color:var(--sidebar-bg);color:var(--text-primary)}[data-theme=light] #topic-select{background-color:var(--sidebar-bg)!important;color:var(--text-primary)!important;border:1px solid var(--border-color)!important}[data-theme=light] #topic-select option{background-color:var(--sidebar-bg)!important;color:var(--text-primary)!important}#login-container{display:flex;justify-content:center;align-items:center;width:100%;height:100vh;background-color:var(--background-color)}.login-box{background-color:var(--sidebar-bg);padding:3rem;border-radius:12px;border:1px solid var(--border-color);text-align:center;max-width:400px;width:90%;box-shadow:0 10px 30px -15px #020c1bb3}.login-box h1{color:var(--accent-color);margin-top:0;font-size:2rem}.login-box p{color:var(--text-secondary);margin-bottom:2rem}#login-form{display:flex;flex-direction:column;gap:1rem}#login-form input{background-color:var(--background-color);border:1px solid var(--border-color);border-radius:6px;padding:.75rem 1rem;color:var(--text-primary);font-size:1.1rem;text-align:center}#login-form input:focus{outline:none;border-color:var(--accent-color)}#login-error{color:var(--incorrect-color);min-height:1.2em;margin-top:.5rem;margin-bottom:0;font-size:.9rem}.accordion details{border:1px solid var(--border-color);border-radius:8px;background-color:var(--card-bg);overflow:hidden;margin-bottom:2rem}.accordion summary{padding:1rem 1.5rem;cursor:pointer;font-size:1.2rem;font-weight:600;color:var(--accent-color);list-style:none;display:flex;justify-content:space-between;align-items:center}.accordion summary::-webkit-details-marker{display:none}.accordion summary:after{content:"▼";font-size:1rem;transition:transform .2s}.accordion details[open] summary:after{transform:rotate(180deg)}.accordion .accordion-content{padding:0 1.5rem 1.5rem;border-top:1px solid var(--border-color);line-height:1.6}.accordion .accordion-content h4{margin-top:1.5rem;color:var(--text-primary)}#temario-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1.5rem}.temario-card{background-color:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;padding:1.5rem;text-align:center;cursor:pointer;transition:transform .2s,border-color .2s,box-shadow .2s;display:flex;flex-direction:column;align-items:center}.temario-card:hover{transform:translateY(-5px);border-color:var(--accent-color);box-shadow:0 4px 15px #0003}.temario-card .icon{font-size:3rem;line-height:1}.temario-card h3{margin:1rem 0 0;color:var(--text-primary);font-size:1.1rem;flex-grow:1}.temario-card.extra{border-style:dashed}.temario-card-extra-info{font-size:.75rem;color:var(--text-secondary);border:1px solid var(--text-secondary);border-radius:10px;padding:2px 8px;margin-top:.75rem;display:inline-block}#pruebas-grid,#curiosidades-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;margin-top:2rem}.prueba-card,.curiosidad-card{background-color:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;padding:2rem;text-align:center;cursor:pointer;transition:transform .2s,border-color .2s,box-shadow .2s}.prueba-card:hover,.curiosidad-card:hover{transform:translateY(-5px);border-color:var(--accent-color);box-shadow:0 4px 15px #0003}.prueba-card svg,.curiosidad-card svg{width:48px;height:48px;color:var(--accent-color);margin-bottom:1rem}.prueba-card h4,.curiosidad-card h4{margin:0 0 .5rem;font-size:1.3rem}.prueba-card p,.curiosidad-card p{color:var(--text-secondary);font-size:.9rem;line-height:1.5}.topic-content{max-width:800px;line-height:1.7}.topic-content h2,.topic-content h3,.topic-content h4{color:var(--accent-color);border-bottom:1px solid var(--border-color);padding-bottom:.5rem;margin-top:2.5rem}.topic-content .content-table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:.95rem}.topic-content .content-table th,.topic-content .content-table td{border:1px solid var(--border-color);padding:.8rem 1rem;text-align:left}.topic-content .content-table th{background-color:var(--sidebar-bg);font-weight:600}.info-box{background-color:#64ffda0d;border-left:4px solid var(--accent-color);padding:1rem 1.5rem;margin:1.5rem 0;border-radius:0 8px 8px 0}[data-theme=light] .info-box{background-color:#0062e30d}.info-box.danger{border-left-color:var(--incorrect-color);background-color:#dc35450d}#search-bar{width:100%;max-width:600px;padding:.75rem 1rem;background-color:var(--sidebar-bg);border:1px solid var(--border-color);border-radius:6px;color:var(--text-primary);font-size:1rem;margin-bottom:2rem}.glosario-list dt{color:var(--accent-color);font-weight:700;font-size:1.1rem;margin-top:1.5rem}.glosario-list dd{margin-left:0;margin-bottom:1rem;color:var(--text-secondary);border-left:3px solid var(--border-color);padding-left:1rem}.flashcard-container{display:flex;flex-direction:column;align-items:center;gap:2rem;margin:auto}.flashcard-scene{width:300px;height:400px;perspective:1000px}.flashcard{width:100%;height:100%;position:relative;transition:transform .8s;transform-style:preserve-3d;cursor:pointer}.flashcard.is-flipped{transform:rotateY(180deg)}.flashcard-face{position:absolute;width:100%;height:100%;-webkit-backface-visibility:hidden;backface-visibility:hidden;background-color:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:1.5rem;text-align:center}.flashcard-face--front img,.flashcard-face--front svg{max-width:90%;max-height:90%;object-fit:contain}.flashcard-face--back{transform:rotateY(180deg)}.flashcard-face--back h3{color:var(--accent-color);margin-top:0}.flashcard-controls{display:flex;gap:1rem}.exam-intro-container,.quiz-container,.quiz-result-container{max-width:800px;width:100%;margin:auto}.quiz-card,.test-result-card,.exam-card{background-color:var(--card-bg);padding:2rem;border-radius:12px;border:1px solid var(--border-color);margin-bottom:1.5rem}.quiz-question-text{font-size:1.2rem;margin:1rem 0 1.5rem}.quiz-options{display:flex;flex-direction:column;gap:.75rem}.quiz-options button{width:100%;padding:.8rem 1rem;text-align:left;background-color:var(--sidebar-bg);color:var(--text-primary);border:1px solid var(--border-color);border-radius:6px;cursor:pointer;font-size:1rem;transition:background-color .2s,border-color .2s}.quiz-options button:hover:not(:disabled){border-color:var(--accent-color)}.quiz-options button.correct{background-color:#28a74533;border-color:var(--correct-color);color:var(--text-primary)}.quiz-options button.incorrect{background-color:#dc354533;border-color:var(--incorrect-color);color:var(--text-primary)}.quiz-options button:disabled{cursor:not-allowed;opacity:.8}.quiz-feedback{margin-top:1.5rem;padding:1rem;border-radius:6px;display:none}.quiz-feedback.correct{border-left:5px solid var(--correct-color);background-color:#28a7451a}.quiz-feedback.incorrect{border-left:5px solid var(--incorrect-color);background-color:#dc35451a}.quiz-controls{margin-top:1.5rem;text-align:right}.next-question-btn{display:none}.next-question-btn.show{display:inline-block}.quiz-question-image{text-align:center;margin:1rem 0}.quiz-question-image img,.quiz-question-image svg{max-width:100%;max-height:200px;border-radius:8px}.result-summary{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem;margin:2rem 0}.result-item{background:var(--sidebar-bg);padding:1rem 1.5rem;border-radius:8px;text-align:center}.result-item span{color:var(--text-secondary);font-size:.9rem}.result-item strong{font-size:2rem;display:block}.result-item .pass{color:var(--correct-color)}.result-item .fail{color:var(--incorrect-color)}.quiz-result-actions{text-align:center;margin-top:2rem;display:flex;gap:1rem;justify-content:center}.test-history-list .test-result-card{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem}.test-result-card h4{margin:0 0 .25rem;font-size:1.1rem}.test-result-card .date{font-size:.8rem;color:var(--text-secondary)}.test-result-card .score{text-align:right}.test-result-card .score.pass p{color:var(--correct-color)}.test-result-card .score.fail p{color:var(--incorrect-color)}.test-result-card .score p{margin:0;font-weight:700;font-size:1.2rem}.test-result-card .score small{font-size:.8rem;color:var(--text-secondary)}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#000000b3;display:flex;justify-content:center;align-items:center;z-index:1001;padding:1rem}.modal-content{background-color:var(--background-color);border-radius:12px;width:100%;max-width:800px;max-height:90vh;display:flex;flex-direction:column}.modal-header{padding:1rem 1.5rem;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center}.modal-header h3{margin:0;color:var(--accent-color)}.modal-close-btn{background:none;border:none;color:var(--text-secondary);font-size:1.5rem;cursor:pointer}.modal-body{padding:1.5rem;overflow-y:auto}.failed-question-item{padding-bottom:1.5rem;margin-bottom:1.5rem;border-bottom:1px solid var(--border-color)}.failed-question-item:last-child{border-bottom:none}.failed-question-item .correct-answer{margin-top:1rem;background-color:#28a7451a;border-left:4px solid var(--correct-color);padding:.75rem 1rem;border-radius:4px}.failed-question-item .explanation{margin-top:.75rem;font-style:italic;color:var(--text-secondary)}.message{padding:.75rem 1.25rem;border-radius:18px;max-width:85%;line-height:1.5;position:relative}.user-message{background-color:var(--user-message-bg);color:#fff;border-bottom-right-radius:4px;align-self:flex-end}.ai-message{background-color:var(--card-bg);border:1px solid var(--border-color);border-bottom-left-radius:4px;align-self:flex-start;padding-right:3rem}.ai-message p:first-child{margin-top:0}.ai-message p:last-child{margin-bottom:0}.loading{display:flex;align-items:center;gap:5px}.loading span{width:8px;height:8px;border-radius:50%;background-color:var(--text-secondary);animation:bounce 1.4s infinite ease-in-out both}.loading span:nth-child(1){animation-delay:-.32s}.loading span:nth-child(2){animation-delay:-.16s}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.speak-button{background:none;border:none;cursor:pointer;padding:0;color:var(--text-secondary);position:absolute;bottom:8px;right:8px;opacity:.7;transition:opacity .2s,color .2s}.speak-button:hover{opacity:1;color:var(--accent-color)}.speak-button svg{width:20px;height:20px}.quiz-speak-button{position:static;display:inline-flex;vertical-align:middle;margin-left:.5rem}.speak-button.speaking{color:var(--accent-color)}.back-to-top-btn{position:absolute;bottom:2rem;right:2rem;background-color:var(--sidebar-bg);border:1px solid var(--border-color);border-radius:50%;width:40px;height:40px;cursor:pointer;opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s;font-size:1.2rem}.back-to-top-btn.visible{opacity:1;visibility:visible}[data-theme=light] .back-to-top-btn{color:var(--text-primary)}@media (max-width: 768px){.result-summary{grid-template-columns:1fr}.test-result-card{flex-direction:column;align-items:flex-start;gap:.5rem}.test-result-card .actions{margin-left:0;margin-top:.5rem}}.progress-dashboard{display:flex;flex-direction:column;gap:2rem;max-width:900px;margin:0 auto}.thermometer-container{background-color:var(--card-bg);padding:1.5rem 2rem;border-radius:12px;border:1px solid var(--border-color);text-align:center}.thermometer-container h3{margin-top:0;color:var(--accent-color)}.thermometer{display:flex;gap:5px;height:30px;width:100%;max-width:500px;margin:1rem auto;border:2px solid var(--border-color);border-radius:15px;padding:5px;background-color:var(--background-color)}.thermometer-level{flex-grow:1;background-color:var(--sidebar-bg);border-radius:5px;transition:background-color .5s ease}.thermometer-level.filled{background:linear-gradient(90deg,var(--correct-color),var(--accent-color))}.thermometer-container p{font-size:1.1rem;font-weight:600}.stats-panel{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1.5rem}.stat-card{background-color:var(--card-bg);padding:1.5rem;border-radius:12px;border:1px solid var(--border-color);text-align:center}.stat-card span{display:block;color:var(--text-secondary);margin-bottom:.5rem}.stat-card strong{font-size:2.5rem;color:var(--text-primary);font-weight:700}.ai-suggestions{background-color:#64ffda0d;border-left:4px solid var(--accent-color);padding:1.5rem;margin:0;border-radius:0 8px 8px 0}[data-theme=light] .ai-suggestions{background-color:#0062e30d}.ai-suggestions h4{margin-top:0;color:var(--accent-color)}.ai-suggestions ul{padding-left:20px}.review-test-section{text-align:center;background-color:var(--sidebar-bg);padding:2rem;border-radius:12px}.review-test-section p{margin-top:0;color:var(--text-secondary)}.sancion-leve{color:#f1c40f}.sancion-grave{color:#e67e22}.sancion-muy-grave{color:#e74c60}.lang-tag{background-color:var(--accent-color);color:var(--background-color);padding:2px 6px;border-radius:4px;font-size:.7rem;font-weight:700;margin-right:.5rem;vertical-align:middle}.multa-table{width:100%;border-collapse:collapse;margin:1.5rem 0;font-size:.9rem;line-height:1.5}.multa-table th,.multa-table td{border:1px solid var(--border-color);padding:.8rem 1rem;text-align:left;vertical-align:top}.multa-table th{background-color:var(--sidebar-bg);color:var(--accent-color)}.multa-table .sancion-cell{font-weight:700;white-space:nowrap}.imagen-placeholder{background:linear-gradient(135deg,var(--card-bg) 0%,var(--sidebar-bg) 100%);border:2px dashed var(--border-color);border-radius:12px;padding:2rem;text-align:center;margin:1rem 0;transition:all .3s ease;position:relative;overflow:hidden}.imagen-placeholder:hover{border-color:var(--accent-color);background:linear-gradient(135deg,var(--sidebar-bg) 0%,var(--card-bg) 100%)}.imagen-placeholder:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(100,255,218,.1),transparent);animation:shimmer 2s infinite}@keyframes shimmer{0%{left:-100%}to{left:100%}}.placeholder-content{position:relative;z-index:1}.placeholder-icon{font-size:3rem;margin-bottom:1rem;opacity:.6}.placeholder-text{color:var(--text-primary);font-size:1rem;margin-bottom:1rem;line-height:1.5}.placeholder-text strong{color:var(--accent-color);font-weight:600}.placeholder-details{display:flex;flex-direction:column;gap:.25rem;color:var(--text-secondary);font-size:.85rem;opacity:.8}.imagen-no-encontrada{background-color:var(--incorrect-color);color:#fff;padding:1rem;border-radius:8px;text-align:center;font-weight:600;margin:1rem 0}.imagen-ficticia.fotografia .placeholder-icon:before{content:"📸"}.imagen-ficticia.diagrama .placeholder-icon:before{content:"📊"}.imagen-ficticia.ilustracion .placeholder-icon:before{content:"🎨"}.imagen-ficticia.esquema .placeholder-icon:before{content:"📐"}@media (max-width: 768px){.imagen-placeholder{padding:1.5rem 1rem}.placeholder-icon{font-size:2.5rem}.placeholder-text{font-size:.9rem}.placeholder-details{font-size:.8rem}}[data-theme=light] .imagen-placeholder{background:linear-gradient(135deg,#fff,#f8f9fa);border-color:#d8dde4}[data-theme=light] .imagen-placeholder:hover{border-color:var(--accent-color);background:linear-gradient(135deg,#f8f9fa,#fff)}[data-theme=light] .imagen-placeholder:before{background:linear-gradient(90deg,transparent,rgba(0,98,227,.1),transparent)}