/* Nexo Científico Aula — 1.5. Sin dependencias externas. */
.nexo-aula{background:#f7fafd}.aula-hero{position:relative;overflow:hidden;background:linear-gradient(126deg,#082943 5%,#124269 50%,#137a83 110%);color:white}.aula-hero:before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(circle at 72% 13%,#5debd039,transparent 28%),radial-gradient(circle at 15% 86%,#21b5ce24,transparent 38%),repeating-radial-gradient(ellipse at 92% 69%,transparent 0 20px,#d7f9fc0e 21px 22px,transparent 23px 55px);opacity:.96}.aula-hero:after{content:"";position:absolute;width:760px;height:760px;border:1px solid #c4f2fb1a;border-radius:46%;top:-410px;left:52%;transform:rotate(-18deg);box-shadow:0 0 0 70px #c4f2fb06,0 0 0 145px #c4f2fb08,0 0 0 230px #c4f2fb03;pointer-events:none}.aula-hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(280px,.95fr);align-items:center;gap:38px;min-height:480px;padding-top:64px;padding-bottom:72px;position:relative;z-index:1}.aula-kicker{display:inline-block;font-size:.74rem;font-weight:850;color:#73eee1;letter-spacing:.16em;margin-bottom:20px}.aula-hero h1{font-size:clamp(2.35rem,4.6vw,4.8rem);letter-spacing:-.04em;line-height:1.04;color:white;margin:0 0 26px}.aula-hero h1 em{font-style:normal;color:#87eade}.aula-hero p{color:#d7edf3;max-width:570px;line-height:1.8;font-size:1rem}.aula-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}.aula-outline-light{border:1px solid #ccebf2a8!important;color:white!important;background:#ffffff11!important}.aula-outline-light:hover{background:#ffffff26!important}.aula-hero .aula-disclaimer{margin-top:30px;font-size:.74rem;color:#bbd5de}.aula-hero-graphic{position:relative;min-height:370px;display:grid;place-items:center}.aula-orbit{width:min(350px,78vw);height:min(350px,78vw);border:1px solid #a7f7f45a;border-radius:50%;position:relative;background:radial-gradient(circle,#ffffff1a 0 24%,transparent 60%);box-shadow:0 0 0 28px #a7f7f411,0 0 0 60px #a7f7f408,inset 0 0 60px #66e7e420}.aula-orbit:before,.aula-orbit:after{content:"";position:absolute;border-radius:50%;inset:45px;border:1px dashed #a7f7f465;transform:rotate(22deg)}.aula-orbit:after{inset:94px;border:1px solid #aae3ec31}.aula-orbit-center{position:absolute;inset:31%;display:flex;align-items:center;justify-content:center;gap:0;font-weight:900;font-size:3.1rem;letter-spacing:-.05em;color:#fff;border-radius:24px;background:linear-gradient(135deg,#2abfb7,#0c4267);transform:rotate(-8deg);box-shadow:0 20px 60px #041e3e88}.aula-orbit-center span{font-size:1.15rem;color:#8af6ea;margin:0 -2px}.orbit-dot{position:absolute;width:17px;height:17px;border:3px solid #e8fffc;background:#13bab6;border-radius:50%;box-shadow:0 0 0 7px #13bab634}.orbit-dot.d1{top:12%;left:18%}.orbit-dot.d2{top:29%;right:3%}.orbit-dot.d3{bottom:1%;left:44%}.orbit-dot.d4{bottom:20%;left:4%}.aula-glass{position:absolute;right:0;bottom:2px;background:#ffffffed;box-shadow:0 16px 55px #071f3955;border:1px solid #fff;border-radius:17px;padding:18px 23px;display:flex;flex-direction:column;color:#0c3553;min-width:170px}.aula-glass>span{font-size:.65rem;letter-spacing:.13em;font-weight:900;color:#27868f}.aula-glass strong{font-size:3.2rem;line-height:1.1}.aula-glass small{font-size:.7rem}.aula-section .section-head{margin-bottom:30px}.aula-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}.aula-stats>div{padding:22px 20px;background:white;border:1px solid #dfedf1;border-radius:15px;box-shadow:0 8px 24px #0a426009}.aula-stats strong{display:block;color:#0a4a6a;font-size:1.8rem;line-height:1.2}.aula-stats span{font-size:.81rem;color:#6f8291}.aula-progress-panel{padding:32px 34px;border:1px solid #d8eaf0;background:linear-gradient(125deg,#ffffff,#f0fcfb);border-radius:19px;box-shadow:0 12px 36px #0c4d7010}.aula-progress-head{display:flex;justify-content:space-between;align-items:center;gap:20px}.aula-progress-head h2{margin:4px 0 8px;font-size:1.8rem}.aula-progress-head p{font-size:.85rem;margin:0}.aula-big-progress{display:flex;flex-direction:column;align-items:end}.aula-big-progress strong{font-size:2.8rem;color:#118c8d}.aula-big-progress span{font-size:.72rem;color:#6a8b99}.aula-meter{height:12px;background:#dbeef1;border-radius:30px;overflow:hidden;margin-top:27px}.aula-meter>span{display:block;height:100%;width:0;background:linear-gradient(90deg,#078d9f,#22bdb2);border-radius:inherit;transition:width .2s}.aula-progress-footer{display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin-top:18px;font-size:.77rem;color:#516c82}.aula-small-btn{border:1px solid #b8d9df;background:#fff;border-radius:8px;padding:9px 12px;color:#0f607b;cursor:pointer;font-size:.75rem;font-weight:800}.aula-light{background:linear-gradient(160deg,#edf7fa 0,#f8fbfd 54%,#eef8f9 100%)}.aula-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.aula-card{border:1px solid #d9e7ed;background:#fff;border-radius:18px;padding:25px;display:flex;flex-direction:column;gap:12px;box-shadow:0 12px 35px #073a5d0b;transition:transform .18s,box-shadow .18s;min-height:260px}.aula-card:hover{transform:translateY(-3px);box-shadow:0 18px 42px #073a5d1b}.aula-card-head{display:flex;justify-content:space-between;align-items:center}.aula-card-index{font-size:.76rem;color:#0c8190;letter-spacing:.12em;font-weight:850}.aula-card-mark{font-size:.69rem;font-weight:800;color:#7b909c;padding:6px 9px;border-radius:99px;background:#eef4f6}.aula-card.is-done .aula-card-mark{color:#075f57;background:#ddf6ed}.aula-card h3{color:#0c3554;margin:0;line-height:1.35;font-size:1.13rem}.aula-card p{line-height:1.65;font-size:.84rem;margin:0;flex:1}.aula-card-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid #e7eff2;padding-top:13px}.aula-card-bottom small{font-size:.7rem;color:#8295a2}.aula-card-bottom a{color:#087d87;font-weight:850;font-size:.83rem}.aula-bottom-grid{display:grid;grid-template-columns:1.07fr .93fr;gap:25px;align-items:start}.aula-callout{border-radius:20px;padding:45px;background:linear-gradient(125deg,#0a3657,#126e7c);color:white;min-height:340px;position:relative;overflow:hidden}.aula-callout:after{content:"";width:300px;height:300px;border:1px solid #a9faeb49;border-radius:50%;position:absolute;right:-120px;top:-120px;box-shadow:0 0 0 40px #a9faeb14,0 0 0 90px #a9faeb0a;pointer-events:none}.aula-callout h2{color:white;max-width:420px}.aula-callout p{color:#d8e9ee;max-width:460px}.aula-reference-box{background:#fff;padding:38px;border:1px solid #dfebf0;border-radius:20px;min-height:340px}.aula-reference-box a{display:block;padding:12px 0;border-bottom:1px solid #e8eff2;font-size:.84rem;color:#086983;font-weight:700}.aula-lesson-header{padding:48px 0 56px;background:linear-gradient(115deg,#0a304e,#135374,#0f8488);position:relative;color:#fff;overflow:hidden}.aula-lesson-header:after{content:"";position:absolute;right:-60px;top:-70px;height:390px;width:390px;border:1px solid #aeffeb4d;border-radius:50%;box-shadow:0 0 0 60px #aeffeb11,0 0 0 130px #aeffeb0a;pointer-events:none}.aula-lesson-header .wrap{position:relative;z-index:1}.aula-crumb{display:inline-block;color:#c5eeee;font-size:.8rem;margin-bottom:27px;font-weight:700}.aula-lesson-header h1{color:white;font-size:clamp(2.25rem,4vw,3.7rem);line-height:1.11;max-width:880px}.aula-lesson-header p{color:#d1e9f1;max-width:790px;line-height:1.8}.aula-lesson-grid{display:grid;grid-template-columns:minmax(0,1fr) 275px;gap:28px;align-items:start}.aula-paper{background:white;border:1px solid #dce8ef;border-radius:18px;padding:44px;box-shadow:0 8px 27px #103c540c}.aula-paper section{margin-bottom:36px}.aula-paper h2{font-size:1.5rem;margin:0 0 20px;color:#123b5d}.aula-paper h3{font-size:1.12rem}.aula-paper ul{padding-left:23px}.aula-paper li{margin-bottom:14px;line-height:1.75;color:#47667a;font-size:.93rem}.aula-paper .aula-case{padding:24px 25px;background:#edf7f9;border-left:4px solid #17a7a0;border-radius:0 12px 12px 0}.aula-paper .aula-case p{margin:7px 0 0;line-height:1.8}.aula-paper .aula-sources a{font-size:.85rem;color:#086c81;text-decoration:underline;overflow-wrap:anywhere}.aula-side{position:sticky;top:110px;display:grid;gap:15px}.aula-side-card{border:1px solid #dce9ef;background:#fff;border-radius:15px;padding:24px}.aula-side-icon{font-size:2rem;color:#14aaab}.aula-side-card p{font-size:.83rem;line-height:1.75}.aula-side-card .button{width:100%;font-size:.77rem;padding:10px 12px}.aula-side-card .aula-small-btn{width:100%;margin-top:10px}.aula-side-faint{background:#eff7f9}.aula-neighbors{margin-top:23px;display:flex;flex-direction:column;gap:10px}.aula-neighbors a{font-size:.78rem;color:#0b6880;font-weight:750;border-top:1px solid #e8eff2;padding-top:12px}.aula-exam-wrap{max-width:1030px}.aula-exam-toolbar{display:flex;flex-wrap:wrap;align-items:end;gap:20px;justify-content:space-between;padding:28px;border-radius:16px;background:#fff;border:1px solid #d9ebf0}.aula-exam-toolbar h2{margin:0 0 5px;font-size:1.48rem}.aula-exam-toolbar p{margin:0;font-size:.84rem}.aula-select-wrap{display:flex;flex-direction:column;gap:5px}.aula-select-wrap label{font-size:.75rem;font-weight:800;color:#4b6676}.aula-select-wrap select{padding:11px;border:1px solid #b9d3de;border-radius:9px;color:#144f67;background:#fff}.aula-exam-info{display:flex;flex-wrap:wrap;gap:20px;margin:24px 0 28px;color:#3b7d83;font-size:.77rem;font-weight:750}.aula-exam-welcome{min-height:260px;display:grid;place-content:center;text-align:center;background:#fff;border:1px dashed #bfdce4;border-radius:18px;padding:35px}.aula-exam-welcome>span{font-size:3rem;color:#199da7}.aula-exam-welcome h3{margin:0;font-size:1.55rem}.aula-exam-welcome p{max-width:430px}.aula-exam-card{background:#fff;border:1px solid #dce8ee;border-radius:16px;padding:29px 33px;margin-bottom:17px;box-shadow:0 8px 22px #073e5607}.aula-exam-card fieldset{border:none;padding:0;margin:0}.aula-exam-card legend{font-weight:850;color:#103a58;font-size:1rem;margin-bottom:15px}.aula-question-no{font-size:.67rem;color:#098b91;font-weight:850;letter-spacing:.1em;margin-bottom:9px}.aula-exam-card label{display:block;padding:13px 15px;border:1px solid #e2ecef;border-radius:9px;margin-top:10px;cursor:pointer;font-size:.87rem;color:#456477}.aula-exam-card label:hover,.aula-exam-card label:has(input:checked){background:#effafa;border-color:#62c9cb}.aula-exam-card input{accent-color:#159a9d;margin-right:9px}.aula-exam-commands{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:20px}.aula-exam-results{background:#e8f7f5;border:1px solid #b5e2db;border-radius:16px;padding:32px;margin-bottom:25px}.aula-exam-results strong{font-size:2.3rem;color:#0f777e}.aula-exam-results p{color:#3b6570}.aula-explain{font-size:.82rem;line-height:1.7;background:#f0f6f9;border-radius:8px;padding:13px 15px;margin-top:14px}.aula-explain.right{background:#e7f7ee;color:#16604b}.aula-explain.wrong{background:#fff2e8;color:#76502d}.aula-exam-card.grading label{pointer-events:none}.aula-exam-card.grading input{opacity:.7}.aula-reviewed-title{font-size:.67rem;font-weight:900;color:#537c8c;letter-spacing:.1em;margin-top:15px}.aula-disclaimer-box{font-size:.77rem;line-height:1.65;color:#6c8190;padding:15px 20px;background:#edf7f9;border-radius:10px}.aula-status-alert{display:block;color:#89521c;font-weight:700;background:#fff0db;border-radius:9px;padding:10px 14px;margin:12px 0}.aula-tool-footer{font-size:.75rem;color:#718a98}.aula-paper .aula-case h3{margin:0}.aula-lesson-header .aula-kicker{margin-bottom:12px}@media(max-width:990px){.aula-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.aula-hero-grid{grid-template-columns:1fr}.aula-hero-graphic{display:none}.aula-lesson-grid{grid-template-columns:1fr}.aula-side{position:static;grid-template-columns:1fr 1fr}.aula-bottom-grid{grid-template-columns:1fr}}@media(max-width:650px){.aula-hero-grid{padding-top:65px;padding-bottom:60px;min-height:0}.aula-hero h1{font-size:clamp(2.15rem,9vw,3.1rem)}.aula-stats{grid-template-columns:repeat(2,1fr);gap:10px}.aula-stats>div{padding:15px}.aula-progress-panel{padding:22px}.aula-progress-head{align-items:start}.aula-big-progress strong{font-size:2rem}.aula-grid{grid-template-columns:1fr}.aula-paper{padding:25px 20px}.aula-side{grid-template-columns:1fr}.aula-exam-toolbar{padding:20px;align-items:stretch}.aula-select-wrap,.aula-exam-toolbar .button{width:100%}.aula-exam-card{padding:23px 19px}.aula-reference-box,.aula-callout{padding:28px 23px}.aula-lesson-header{padding:33px 0 41px}.aula-exam-info{gap:10px}.aula-progress-footer{gap:9px}}
@media print{.aula-hero,.aula-stats,.aula-progress-panel,.aula-side,.aula-exam-toolbar,.aula-exam-info,.aula-exam-commands,.aula-lesson-header .aula-crumb{display:none!important}.aula-paper{border:0;box-shadow:none;padding:0}.aula-paper li{color:black}.aula-lesson-header{color:black;background:white}.aula-lesson-header h1,.aula-lesson-header p{color:#111!important}.aula-exam-card{break-inside:avoid}}

/* v1.6: cards for multidisciplinary course catalog */
#aula-course-grid .aula-card{background:linear-gradient(147deg,#fff 0%,#eff9fc 100%);border-color:#cfe8ed;min-height:244px}#aula-course-grid .aula-card h3{color:#123B5D}#aula-course-grid .aula-card .aula-card-head .aula-card-index{color:#087e80}#aula-course-grid{margin-top:20px}


/* v1.7 — Recursos multimedia, juegos y estrellas */
.nexo-stars-banner{margin:20px auto 30px;background:linear-gradient(118deg,#103858,#127a85);color:white;border:1px solid #2bc0b8;border-radius:17px;padding:18px 22px;display:flex;gap:16px;align-items:center;flex-wrap:wrap;box-shadow:0 15px 30px #0b51611d}.nexo-star-icon{font-size:2.4rem}.nexo-stars-banner strong{color:#fff;font-size:1.25rem}.nexo-stars-banner small{display:block;color:#c2ebed;font-size:.76rem}.nexo-stars-banner p{margin:0;flex:1 1 250px;color:#ecf9f9;font-size:.77rem;line-height:1.6}.nexo-resource-section,.nexo-games{margin-top:38px;padding-top:18px;border-top:1px solid #dfeaf0}.nexo-section-title span{display:block;font-size:.74rem;color:#0e8e94;font-weight:850;letter-spacing:.09em}.nexo-section-title h2{font-size:1.5rem;margin:8px 0}.nexo-section-title p{font-size:.84rem;line-height:1.65}.nexo-resource-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(235px,1fr));gap:14px;margin-top:20px}.nexo-resource-card,.nexo-game-card{padding:22px;border:1px solid #d2e7ee;background:linear-gradient(145deg,#fff,#f1fafc);border-radius:16px;min-width:0}.nexo-resource-card h3,.nexo-game-card h3{margin:8px 0;color:#123b5d}.nexo-resource-card p,.nexo-game-card p{font-size:.81rem;line-height:1.65}.nexo-resource-card a{font-size:.8rem;color:#0a6985;font-weight:850;display:inline-block;margin-top:10px;overflow-wrap:anywhere}.nexo-kind{font-size:.72rem;color:#0d7f82;font-weight:850}.nexo-video-slot{margin-top:15px;aspect-ratio:16/9;max-width:100%;display:none}.nexo-video-slot:has(iframe){display:block}.nexo-video-slot iframe{width:100%;height:100%;border:0;border-radius:10px}.nexo-game-tabs{display:flex;flex-wrap:wrap;gap:9px;margin:18px 0}.nexo-game-tab{border:1px solid #a9d7de;border-radius:30px;background:#f1f9fa;color:#164f68;font-weight:800;padding:10px 15px;cursor:pointer}.nexo-game-tab[aria-pressed="true"]{background:#0e7281;border-color:#0e7281;color:#fff}.nexo-game-form{display:grid;gap:16px}.nexo-game-pair{display:grid;grid-template-columns:minmax(130px,1fr) minmax(160px,1.3fr);gap:16px;align-items:center}.nexo-game-pair label{font-weight:800;font-size:.89rem;color:#173d54}.nexo-game-pair select{width:100%;padding:11px;border:1px solid #a9cbd8;border-radius:8px;background:white;color:#183d54;font:inherit}.nexo-game-question{border:0;padding:0;margin:0}.nexo-game-question legend{font-weight:800;color:#143b57;margin-bottom:8px}.nexo-game-question label{display:block;padding:9px 13px;border:1px solid #d5e9ed;border-radius:9px;margin-top:7px;cursor:pointer;font-size:.83rem}.nexo-game-question label:has(input:checked){border-color:#16a8a0;background:#e0f6f3}.nexo-game-form .button{justify-self:start}.nexo-result{padding:20px;border-radius:12px;margin-top:15px}.nexo-result.passed{background:#e1f7ee;border:1px solid #a3dec2}.nexo-result.try-again{background:#fff2e3;border:1px solid #ead0a9}.nexo-result strong{font-size:1.15rem;color:#143e57}.nexo-result summary{cursor:pointer;font-weight:750;color:#0f657a}.nexo-result li{margin:8px 0;font-size:.84rem}.nexo-reward-status{font-size:.79rem;color:#0e6d72;font-weight:800;line-height:1.5}.aula-paper .nexo-resource-section h2,.aula-paper .nexo-games h2{font-size:1.4rem}.aula-paper .nexo-resource-card{background:#f6fbfd}.aula-paper .nexo-game-pair label{font-size:.82rem}
@media(max-width:630px){.nexo-stars-banner{padding:15px}.nexo-game-pair{grid-template-columns:1fr;gap:6px}.nexo-game-form .button{width:100%;justify-self:stretch}.nexo-resource-card,.nexo-game-card{padding:16px}.nexo-resource-grid{grid-template-columns:1fr}}
@media print{.nexo-games,.nexo-stars-banner,.nexo-video-button{display:none!important}}

/* Nexo Científico diploma de reconocimiento sin carácter oficial */
.diploma-panel{border:1px solid #b9dfe0;background:linear-gradient(115deg,#eefbfa,#f2f7ff);border-radius:20px;padding:26px;display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:26px}.diploma-panel h2{margin:8px 0}.diploma-panel p{margin:0 0 8px}.diploma-panel small{color:#536679}.diploma-panel a[hidden]{display:none}.diploma-feedback{border:1px solid #f2d38b;background:#fff7e6;padding:20px;border-radius:12px;margin-top:30px}.diploma-form{display:flex;align-items:center;flex-wrap:wrap;gap:14px;background:white;padding:18px;margin:24px 0;border-radius:15px}.diploma-form label{font-weight:700}.diploma-form input{padding:12px;border:1px solid #b6cbd3;border-radius:10px;min-width:220px;flex:1}.diploma-form .helper-note{flex-basis:100%;margin:0}.diploma-sheet{position:relative;isolation:isolate;max-width:1080px;min-height:715px;margin:24px auto;padding:38px 60px;text-align:center;background:radial-gradient(circle at 0 0,#e0f5ff 0,transparent 30%),radial-gradient(circle at 100% 100%,#ffe9b7 0,transparent 30%),#fffdf7;border:14px double #0d6582;border-radius:20px;box-shadow:0 15px 45px #123b5d1b;color:#123b5d;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px}.diploma-sheet:before{content:"";position:absolute;inset:10px;border:2px dotted #e5b24e;border-radius:8px;pointer-events:none}.diploma-confetti{font-size:30px;letter-spacing:10px;color:#dca22e}.diploma-logo{display:flex;align-items:center;gap:12px;font-weight:900;letter-spacing:2px}.diploma-ribbon{font-size:23px;color:#aa6d0b;font-weight:800}.diploma-sheet h1{font-size:clamp(35px,5vw,66px);font-family:Georgia,serif;color:#123b5d;margin:3px 0}.diploma-sheet h2{font-size:clamp(27px,4vw,48px);color:#086f86;border-bottom:2px solid #e5b24e;padding:6px 24px;margin:0}.diploma-sheet h3{font-size:24px;margin:4px auto;max-width:850px}.diploma-intro{font-size:19px;margin:0}.diploma-hours{font-weight:800;font-size:19px}.diploma-stars{font-size:34px;color:#dca22e;letter-spacing:12px}.diploma-date{font-weight:600}.diploma-disclaimer{background:#fff2dd;border:2px solid #ba8130;padding:12px 22px;border-radius:12px;max-width:870px;color:#74420c;font-size:13px;line-height:1.55}.diploma-sheet small{font-size:11px;color:#385b70}@media(max-width:700px){.diploma-panel{flex-direction:column;align-items:stretch}.diploma-sheet{padding:25px 12px;min-height:720px}.diploma-confetti{letter-spacing:2px}.diploma-sheet h3{font-size:19px}}
@page{size:A4 landscape;margin:8mm}@media print{body.diploma-print .utility,body.diploma-print .site-header,body.diploma-print .footer,body.diploma-print .back-top{display:none!important}body:has(.diploma-sheet) .utility,body:has(.diploma-sheet) .site-header,body:has(.diploma-sheet) .footer,body:has(.diploma-sheet) .back-top,body:has(.diploma-sheet) .diploma-form,body:has(.diploma-sheet) .aula-crumb{display:none!important}body:has(.diploma-sheet) .section{padding:0!important}body:has(.diploma-sheet) .wrap{max-width:none!important;padding:0!important}body:has(.diploma-sheet) .diploma-sheet{box-shadow:none!important;border-width:9px!important;min-height:175mm!important;max-height:187mm!important;margin:0!important;padding:9mm 15mm!important;gap:6px!important;break-inside:avoid;-webkit-print-color-adjust:exact;print-color-adjust:exact}body:has(.diploma-sheet) .diploma-sheet h1{font-size:46px!important}body:has(.diploma-sheet) .diploma-sheet h2{font-size:36px!important}}