:root{--bg:#070b14;--card:#111827;--card2:#162033;--text:#f4f7fb;--muted:#9aa8bd;--line:#263247;--brand:#67e8f9;--brand2:#8b5cf6;--good:#34d399;--bad:#fb7185;--warn:#fbbf24;--safe:env(safe-area-inset-bottom)}*{box-sizing:border-box}html{background:var(--bg)}body{margin:0;background:radial-gradient(circle at 20% -20%,#172554 0,transparent 34%),var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;min-height:100vh}.boot{padding:40px;text-align:center;color:var(--muted)}button,input,select{font:inherit}.shell{width:min(1080px,100%);margin:auto;padding:24px 18px calc(112px + var(--safe))}.hero,.topicHero,.resultHero{position:relative;overflow:hidden;border:1px solid var(--line);background:linear-gradient(145deg,rgba(22,32,51,.94),rgba(10,16,32,.97));border-radius:28px;padding:30px;box-shadow:0 24px 70px rgba(0,0,0,.25)}.hero:after{content:"";position:absolute;width:280px;height:280px;border-radius:50%;right:-110px;top:-130px;background:linear-gradient(135deg,rgba(103,232,249,.25),rgba(139,92,246,.1));filter:blur(4px)}.heroV2 h1,.topicHero h1,.resultHero h1{margin:7px 0 10px;font-size:clamp(34px,7vw,62px);line-height:1.02;letter-spacing:-.04em}.heroMark{position:absolute;right:26px;top:24px;width:58px;height:58px;display:grid;place-items:center;border:1px solid #ffffff28;border-radius:18px;font-weight:900;background:#ffffff0d;color:var(--brand)}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:11px;font-weight:800;color:var(--brand)}.sub{color:var(--muted);line-height:1.55;max-width:780px}.small{color:var(--muted);font-size:13px;line-height:1.45}.center{text-align:center}.stats{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.stat{min-width:120px;background:#ffffff08;border:1px solid #ffffff10;border-radius:16px;padding:12px 14px}.stat strong{display:block;font-size:23px}.stat small{color:var(--muted)}.today{margin-top:18px;padding:14px;border:1px solid #ffffff13;background:#05081266;border-radius:16px}.today>div:first-child{display:flex;justify-content:space-between;font-size:13px;margin-bottom:8px}.progress,.miniProgress{height:8px;background:#ffffff12;border-radius:999px;overflow:hidden}.progress i,.miniProgress i{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--brand),var(--brand2))}.toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.btn{border:0;border-radius:14px;padding:12px 17px;background:linear-gradient(135deg,var(--brand),#60a5fa);color:#041019;font-weight:800;cursor:pointer}.btn.secondary{background:#1f2937;color:var(--text);border:1px solid var(--line)}.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--line)}.btn.wide{width:100%;margin-top:15px}.textBtn{border:0;background:none;color:var(--brand);font-weight:700;cursor:pointer}.sectionTitle{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:26px 2px 14px}.sectionTitle h2{margin:2px 0;font-size:24px}.badge,.pill,.level{display:inline-flex;align-items:center;border:1px solid var(--line);background:#ffffff08;border-radius:999px;padding:5px 9px;color:#cbd5e1;font-size:11px;font-weight:750}.pill.verified{border-color:#34d39955;color:#6ee7b7}.pill.generated{border-color:#8b5cf655;color:#c4b5fd}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.topic{cursor:pointer;overflow:hidden;border:1px solid var(--line);background:var(--card);border-radius:22px;transition:.18s transform,.18s border-color}.topic:hover{transform:translateY(-2px);border-color:#42526d}.topicArt{height:130px;position:relative;overflow:hidden;background:#0b1220}.topicArt img{width:100%;height:100%;object-fit:cover}.topicArt .level{position:absolute;right:10px;top:10px;background:#060b14cc}.topicBody{padding:15px}.topic h3{font-size:15px;line-height:1.3;margin:0 0 10px}.topicMini{display:flex;gap:8px;flex-wrap:wrap;color:var(--muted);font-size:11px;margin-bottom:9px}.meta{color:var(--muted);font-size:11px;margin-top:7px}.miniProgress{height:5px}.search,.field select,.goalRow input{width:100%;border:1px solid var(--line);background:#0e1626;color:var(--text);border-radius:14px;padding:13px 14px;outline:none}.search:focus,.field select:focus{border-color:#67e8f980}.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:14px 0}.kpis.four{grid-template-columns:repeat(4,1fr)}.kpis article,.resultGrid article{border:1px solid var(--line);background:#0d1422;border-radius:18px;padding:15px}.kpis span,.kpis small,.resultGrid span{display:block;color:var(--muted);font-size:12px}.kpis b{display:block;font-size:26px;margin:4px 0}.weakGrid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.weakGrid button{border:1px solid #fb718544;background:#fb71850b;color:var(--text);text-align:left;border-radius:16px;padding:13px;cursor:pointer}.weakGrid span{display:block;color:var(--muted);font-size:11px;margin-top:4px}.topicHero{display:grid;grid-template-columns:240px 1fr;align-items:center;gap:24px}.topicHero img{width:100%;border-radius:20px;max-height:180px;object-fit:cover}.topicHero h1{font-size:clamp(27px,5vw,46px)}.master{max-width:520px}.master>span{font-size:12px;color:var(--muted)}.modeGrid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:14px 0}.modeGrid button{background:var(--card);color:var(--text);border:1px solid var(--line);border-radius:18px;text-align:left;padding:16px;cursor:pointer}.modeGrid b,.modeGrid strong,.modeGrid span{display:block}.modeGrid strong{font-size:28px;margin:6px 0;color:var(--brand)}.modeGrid span{font-size:11px;color:var(--muted);line-height:1.35}.panel{border:1px solid var(--line);background:rgba(17,24,39,.93);border-radius:22px;padding:20px;margin:14px 0}.panel h2,.panel h3{margin-top:0}.sourcePanel{border-left:3px solid var(--brand2)}code{color:#c4b5fd;background:#ffffff08;padding:2px 5px;border-radius:5px}.quizShell{max-width:760px}.quizTop{display:flex;justify-content:space-between;align-items:center;gap:12px}.quizTop>div:nth-child(2){flex:1}.iconBtn,.favBtn{width:42px;height:42px;border-radius:50%;border:1px solid var(--line);background:var(--card);color:var(--text);font-size:24px;cursor:pointer}.favBtn{font-size:19px;color:#64748b}.favBtn.on{color:var(--warn);border-color:#fbbf2466}.quizScore{font-weight:800;color:var(--good)}.quizProgress{margin:13px 0}.questionPanel{padding:23px}.questionMeta{display:flex;justify-content:space-between;align-items:center}.question{font-size:clamp(19px,4vw,25px);font-weight:750;line-height:1.38;margin:20px 0}.option{display:grid;grid-template-columns:38px 1fr;gap:10px;align-items:start;width:100%;text-align:left;border:1px solid var(--line);background:#0d1422;color:var(--text);border-radius:15px;padding:13px;margin:9px 0;cursor:pointer;line-height:1.4}.option b{display:grid;place-items:center;width:29px;height:29px;border-radius:8px;background:#ffffff0c}.option.correct{border-color:#34d399;background:#34d39916}.option.correct b{background:#34d399;color:#052e22}.option.wrong{border-color:#fb7185;background:#fb718512}.option.wrong b{background:#fb7185;color:#3f0712}.option:disabled{cursor:default}.result{border-radius:15px;padding:15px;margin-top:15px;border:1px solid var(--line)}.result.ok{background:#34d3990e;border-color:#34d39955}.result.bad{background:#fb71850d;border-color:#fb71854d}.trace{margin-top:16px;color:var(--muted);font-size:12px}.trace summary{cursor:pointer;color:#a7b5ca}.trace div{padding-top:9px;line-height:1.6}.resultHero{display:flex;align-items:center;gap:26px}.scoreRing{--p:0;width:150px;height:150px;border-radius:50%;flex:none;display:grid;place-items:center;background:conic-gradient(var(--brand) calc(var(--p)*1%),#ffffff12 0)}.scoreRing:before{content:"";position:absolute;width:122px;height:122px;border-radius:50%;background:#101827}.scoreRing span{position:relative;text-align:center}.scoreRing b{display:block;font-size:30px}.scoreRing small{color:var(--muted)}.resultGrid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:14px 0}.resultGrid b{font-size:28px}.mistakeList{display:grid;gap:8px}.mistake{display:grid;gap:5px;padding:12px;border-bottom:1px solid var(--line)}.mistake b{font-size:11px;color:var(--brand)}.mistake span{font-size:13px;line-height:1.4}.compact{padding:24px}.field{display:grid;gap:7px;margin:12px 0;color:var(--muted);font-size:12px}.history{display:grid;grid-template-columns:90px 1fr auto;gap:10px;padding:10px 0;border-bottom:1px solid var(--line);font-size:12px}.history span,.history small{color:var(--muted)}.flash{perspective:1000px;min-height:390px}.flashInner{position:relative;width:100%;height:390px;transition:transform .45s;transform-style:preserve-3d}.flash.flipped .flashInner{transform:rotateY(180deg)}.face{position:absolute;inset:0;backface-visibility:hidden;border-radius:24px;border:1px solid var(--line);background:linear-gradient(145deg,#172033,#0c1322);padding:34px;display:flex;flex-direction:column;justify-content:center;gap:22px;font-size:24px;font-weight:750;line-height:1.35}.face small{font-size:12px;color:var(--muted);font-weight:500}.face.back{transform:rotateY(180deg);background:linear-gradient(145deg,#102a2b,#0d1622)}.face.back strong{font-size:25px}.flashRate{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}.flashRate button{border:1px solid var(--line);border-radius:14px;padding:12px;background:var(--card);color:var(--text);cursor:pointer}.classFilter{display:flex;gap:7px;margin:10px 0}.chip{border:1px solid var(--line);background:var(--card);color:var(--muted);border-radius:999px;padding:7px 11px;cursor:pointer}.chip.active{color:#06131b;background:var(--brand);border-color:var(--brand)}.classList{padding:8px 18px}.audioItem{display:grid;grid-template-columns:48px 1fr;gap:13px;padding:15px 0;border-bottom:1px solid var(--line)}.audioItem:last-child{border-bottom:0}.num{width:44px;height:44px;display:grid;place-items:center;border-radius:13px;background:#67e8f913;color:var(--brand);font-weight:900}.audioMain audio{width:100%;height:36px;margin-top:8px}.audioMain details{margin-top:8px;color:var(--muted);font-size:12px}.transcript{white-space:pre-wrap;max-height:330px;overflow:auto;margin-top:9px;line-height:1.55;padding:10px;background:#060b14;border-radius:12px}.topicStats button{display:grid;grid-template-columns:1fr auto;align-items:center;gap:8px;width:100%;border:0;border-bottom:1px solid var(--line);background:none;color:var(--text);padding:10px 0;text-align:left;cursor:pointer}.topicStats button>div:first-child{display:grid;grid-template-columns:45px 1fr;gap:7px}.topicStats span{color:var(--muted);font-size:12px}.topicStats strong{font-size:12px}.topicStats .miniProgress{grid-column:1/-1}.goalRow{display:flex;gap:10px}.goalRow input{max-width:140px}.updateDiagram{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;padding:18px;margin-top:14px;border-radius:16px;background:#080d17}.updateDiagram span{border:1px solid var(--line);border-radius:12px;padding:10px}.dangerBox{border-color:#fb718555}.bottom{position:fixed;z-index:30;left:50%;bottom:max(10px,var(--safe));transform:translateX(-50%);display:grid;grid-template-columns:repeat(5,1fr);width:min(650px,calc(100% - 18px));padding:7px;border-radius:22px;background:#0a0f1de8;border:1px solid #263247;backdrop-filter:blur(16px);box-shadow:0 18px 45px #0008}.navBtn{border:0;background:none;color:#718096;border-radius:15px;padding:7px 4px;font-size:10px;cursor:pointer}.navBtn b,.navBtn span{display:block}.navBtn b{font-size:20px;line-height:22px}.navBtn.active{background:#ffffff0d;color:var(--brand)}@media(max-width:760px){.shell{padding:16px 12px 104px}.hero{padding:23px 18px}.stats .stat{min-width:calc(50% - 5px)}.grid{grid-template-columns:1fr}.kpis,.kpis.four{grid-template-columns:repeat(2,1fr)}.weakGrid{grid-template-columns:1fr}.topicHero{grid-template-columns:1fr;padding:18px}.topicHero img{height:150px}.modeGrid{grid-template-columns:repeat(2,1fr)}.resultHero{display:block}.scoreRing{margin-bottom:20px}.history{grid-template-columns:75px 1fr}.history small{grid-column:2}.face{font-size:20px;padding:24px}.heroMark{display:none}}@media(min-width:1000px){.grid{grid-template-columns:repeat(4,1fr)}}
/* V2.1 · cuenta y sincronización */
.syncPanel{border:1px solid rgba(93,227,168,.25)}
.syncPanel .badge.ok{background:rgba(93,227,168,.14);color:#8df0bd}
.accountGrid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:12px 0}
.syncError{padding:10px 12px;border-radius:12px;background:rgba(255,100,100,.1);color:#ffb2b2;font-size:.9rem}
@media(max-width:620px){.accountGrid{grid-template-columns:1fr}}