:root{
  --azul:#13306b;--azul2:#1d4ed8;--azul-s:#e8eefc;--oro:#f2a900;--oro-s:#fff4d6;
  --verde:#0f9d6b;--verde-s:#e3f6ee;--rojo:#d63b3b;--rojo-s:#fde8e8;--morado:#7c3aed;--morado-s:#efe7fe;
  --tx:#15203b;--tx2:#566181;--tx3:#8a93ad;--bg:#f4f6fb;--card:#fff;--ln:#e4e8f2;--sh:0 1px 2px rgba(20,32,70,.06),0 4px 16px rgba(20,32,70,.06);
  --r:14px;--side:248px;font-family:"Segoe UI Variable","Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--tx);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:var(--azul2);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.25;letter-spacing:-.01em}h1{font-size:1.6rem}h2{font-size:1.3rem}h3{font-size:1.08rem}
button,input,select,textarea{font:inherit;color:inherit}
.hide{display:none!important}
/* ---------- estructura ---------- */
.app{display:grid;grid-template-columns:var(--side) 1fr;min-height:100vh}
.side{background:var(--azul);color:#dfe6fb;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;padding:18px 12px;overflow:auto}
.brand{display:flex;align-items:center;gap:10px;padding:4px 8px 18px}
.mark{width:40px;height:40px;border-radius:11px;background:linear-gradient(135deg,var(--oro),#ffcf4d);color:var(--azul);display:grid;place-items:center;font-weight:800;font-size:.85rem;letter-spacing:.02em;flex:none}
.brand b{display:block;color:#fff;font-size:.98rem;line-height:1.15}.brand small{color:#9fb0dc;font-size:.74rem}
.nav{display:flex;flex-direction:column;gap:2px}
.nav a{display:flex;align-items:center;gap:11px;padding:9px 12px;border-radius:10px;color:#cfd8f3;font-weight:500;text-decoration:none}
.nav a:hover{background:rgba(255,255,255,.07);color:#fff}
.nav a.on{background:#fff;color:var(--azul)}
.nav .sec{font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:#8195c9;margin:16px 12px 6px}
.nav .badge{margin-left:auto;background:var(--oro);color:var(--azul);border-radius:99px;font-size:.72rem;padding:1px 7px;font-weight:700}
.ico{width:20px;height:20px;flex:none}
.side .who{margin-top:auto;display:flex;align-items:center;gap:10px;padding:12px 8px 2px;border-top:1px solid rgba(255,255,255,.1)}
.side .who b{color:#fff;font-size:.88rem;display:block;line-height:1.2}.side .who small{color:#9fb0dc;font-size:.75rem}
.main{min-width:0;display:flex;flex-direction:column}
.top{display:flex;align-items:center;gap:12px;padding:14px 28px;background:rgba(244,246,251,.85);backdrop-filter:blur(8px);position:sticky;top:0;z-index:5;border-bottom:1px solid transparent}
.top .crumbs{color:var(--tx2);font-size:.9rem;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.top .crumbs a{color:var(--tx2)}
.top .sp{flex:1}
.btn.menu-btn{display:none}
.content{padding:6px 28px 60px;max-width:1180px;width:100%}
.demo-bar{background:var(--oro-s);color:#7a5300;font-size:.85rem;padding:7px 28px;display:flex;gap:10px;align-items:center;flex-wrap:wrap;border-bottom:1px solid #f5dd9b}
/* ---------- componentes ---------- */
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--sh);padding:20px;border:1px solid var(--ln)}
.card+.card{margin-top:16px}.grid>.card+.card{margin-top:0}
.grid{display:grid;gap:16px}.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
.auto{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.row.end{justify-content:flex-end}.between{justify-content:space-between}
.stack>*+*{margin-top:12px}
.muted{color:var(--tx2)}.small{font-size:.86rem}.tiny{font-size:.76rem}.b{font-weight:600}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:1px solid var(--ln);background:#fff;border-radius:10px;padding:8px 14px;font-weight:600;cursor:pointer;color:var(--tx);transition:.15s;white-space:nowrap;text-decoration:none!important}
.btn:hover{border-color:#c8d0e4;background:#f8f9fd}
.btn.pri{background:var(--azul2);border-color:var(--azul2);color:#fff}.btn.pri:hover{background:#1a43c4}
.btn.oro{background:var(--oro);border-color:var(--oro);color:#2b1d00}
.btn.ok{background:var(--verde);border-color:var(--verde);color:#fff}
.btn.danger{color:var(--rojo)}.btn.danger:hover{background:var(--rojo-s);border-color:#f3b9b9}
.btn.ghost{border-color:transparent;background:transparent}.btn.ghost:hover{background:#eef1f8}
.btn.sm{padding:5px 10px;font-size:.84rem;border-radius:8px}.btn.lg{padding:12px 20px;font-size:1rem}
.btn:disabled{opacity:.5;cursor:not-allowed}
.chip{display:inline-flex;align-items:center;gap:5px;font-size:.75rem;font-weight:600;padding:2px 9px;border-radius:99px;background:#eef1f8;color:var(--tx2);white-space:nowrap}
.chip.az{background:var(--azul-s);color:var(--azul2)}.chip.ok{background:var(--verde-s);color:var(--verde)}.chip.warn{background:var(--oro-s);color:#9a6700}.chip.bad{background:var(--rojo-s);color:var(--rojo)}.chip.mo{background:var(--morado-s);color:var(--morado)}
label.f{display:block;font-size:.83rem;font-weight:600;color:var(--tx2);margin-bottom:12px}
label.f>input,label.f>select,label.f>textarea,.inp{display:block;width:100%;margin-top:5px;padding:9px 12px;border:1px solid #d5dbea;border-radius:10px;background:#fff;font-weight:400;color:var(--tx);outline:none;transition:.15s}
label.f>input:focus,label.f>select:focus,label.f>textarea:focus,.inp:focus{border-color:var(--azul2);box-shadow:0 0 0 3px rgba(29,78,216,.14)}
textarea{resize:vertical;min-height:90px}
.check{display:flex;align-items:center;gap:8px;font-size:.9rem;margin-bottom:10px;cursor:pointer}
.tbl{width:100%;border-collapse:collapse;font-size:.9rem}
.tbl th{text-align:left;font-size:.74rem;text-transform:uppercase;letter-spacing:.05em;color:var(--tx3);font-weight:600;padding:9px 10px;border-bottom:1px solid var(--ln);background:#fafbfe;position:sticky;top:0}
.tbl td{padding:10px;border-bottom:1px solid var(--ln);vertical-align:middle}
.tbl tr:hover td{background:#fafbff}
.tblwrap{overflow:auto;border:1px solid var(--ln);border-radius:12px;max-height:70vh}
.tbl .num{text-align:center;font-variant-numeric:tabular-nums}
.avatar{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:.82rem;color:#fff;flex:none}
.bar{height:8px;background:#e8ecf5;border-radius:99px;overflow:hidden}.bar>i{display:block;height:100%;background:linear-gradient(90deg,var(--azul2),#5b8cff);border-radius:99px;transition:width .5s}
.bar.ok>i{background:linear-gradient(90deg,var(--verde),#3fcf97)}
.empty{text-align:center;color:var(--tx2);padding:34px 20px}.empty .big{font-size:2.2rem;margin-bottom:6px}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--ln);margin:0 0 18px;overflow-x:auto}
.tabs a{padding:10px 14px;color:var(--tx2);font-weight:600;border-bottom:2.5px solid transparent;white-space:nowrap;text-decoration:none}
.tabs a.on{color:var(--azul2);border-color:var(--azul2)}
.kpi{display:flex;gap:14px;align-items:center}.kpi .ic{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:1.3rem;flex:none}
.kpi b{font-size:1.5rem;display:block;line-height:1.1}.kpi span{color:var(--tx2);font-size:.85rem}
.hello{background:linear-gradient(120deg,var(--azul) 0%,#1e46a8 60%,#2b5fd6 100%);color:#fff;border-radius:18px;padding:26px 28px;position:relative;overflow:hidden;margin-bottom:18px}
.hello h1{color:#fff}.hello p{color:#c9d5f7;margin:0}
.hello:after{content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;background:radial-gradient(circle,rgba(242,169,0,.45),transparent 70%)}
/* cursos */
.ccard{background:#fff;border:1px solid var(--ln);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);display:flex;flex-direction:column;transition:.18s;color:inherit;text-decoration:none!important}
.ccard:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(20,32,70,.12)}
.ccard .hd{height:92px;padding:14px 16px;color:#fff;display:flex;flex-direction:column;justify-content:flex-end;position:relative}
.ccard .hd .k{position:absolute;top:12px;right:14px;font-size:.72rem;font-weight:700;background:rgba(255,255,255,.22);padding:2px 8px;border-radius:99px}
.ccard .hd b{font-size:1.02rem;line-height:1.2;text-shadow:0 1px 2px rgba(0,0,0,.15)}
.ccard .bd{padding:14px 16px;flex:1;display:flex;flex-direction:column;gap:8px}
.banner{border-radius:18px;color:#fff;padding:26px 28px;margin-bottom:18px;position:relative;overflow:hidden}
.banner h1{color:#fff;margin-bottom:4px}.banner p{margin:0;opacity:.88}
.banner .pill{display:inline-block;background:rgba(255,255,255,.2);padding:3px 10px;border-radius:99px;font-size:.78rem;font-weight:600;margin-bottom:8px}
.unit{border:1px solid var(--ln);border-radius:var(--r);background:#fff;margin-bottom:14px;overflow:hidden;box-shadow:var(--sh)}
.unit>.uh{display:flex;align-items:center;gap:12px;padding:14px 18px;cursor:pointer;user-select:none}
.unit>.uh h3{margin:0;flex:1;font-size:1rem}
.unit>.uh .car{transition:.2s;color:var(--tx3)}.unit.closed>.uh .car{transform:rotate(-90deg)}
.unit.closed>.ub{display:none}
.unit .ub{border-top:1px solid var(--ln)}
.item{display:flex;align-items:center;gap:14px;padding:12px 18px;border-bottom:1px solid #f0f2f8;color:inherit;text-decoration:none!important;transition:.12s}
.item:last-child{border-bottom:0}.item:hover{background:#f8faff}
.item .ti{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;flex:none}
.item .tx{flex:1;min-width:0}.item .tx b{display:block;font-weight:600;font-size:.94rem}.item .tx small{color:var(--tx2);font-size:.8rem}
.t-leccion{background:var(--azul-s);color:var(--azul2)}.t-tarea{background:var(--oro-s);color:#b57d00}.t-quiz{background:var(--morado-s);color:var(--morado)}.t-foro{background:var(--verde-s);color:var(--verde)}
.done{width:24px;height:24px;border-radius:50%;border:2px solid #d5dbea;display:grid;place-items:center;flex:none;color:#fff}
.done.y{background:var(--verde);border-color:var(--verde)}
/* contenido enriquecido */
.md{line-height:1.65}.md h2{font-size:1.15rem;margin:1.3em 0 .5em;color:var(--azul)}.md h3{font-size:1.02rem;margin:1.1em 0 .4em}
.md h2:first-child,.md h3:first-child{margin-top:0}.md p{margin:.6em 0}.md ul,.md ol{padding-left:1.4em;margin:.5em 0}.md li{margin:.25em 0}
.md blockquote{margin:1em 0;padding:12px 16px;background:var(--oro-s);border-left:4px solid var(--oro);border-radius:0 10px 10px 0;color:#5a4100}
.md code{background:#eef1f8;padding:1px 6px;border-radius:6px;font-size:.9em}.md img{max-width:100%;border-radius:10px}
.md table{border-collapse:collapse;margin:.8em 0}.md td,.md th{border:1px solid var(--ln);padding:6px 10px}
.video{position:relative;padding-top:56.25%;border-radius:14px;overflow:hidden;background:#000;margin:0 0 18px}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.passage{background:#f8f9fd;border:1px solid var(--ln);border-radius:12px;padding:14px 18px;max-height:340px;overflow:auto;margin-bottom:16px;font-size:.93rem}
.passage h4{margin-top:0;color:var(--azul)}
/* cuestionario */
.qwrap{max-width:780px;margin:0 auto}
.qhead{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.qhead .bar{flex:1}
.timer{font-variant-numeric:tabular-nums;font-weight:700;background:#fff;border:1px solid var(--ln);padding:5px 11px;border-radius:9px}
.timer.low{color:var(--rojo);border-color:#f3b9b9;background:var(--rojo-s)}
.qtext{font-size:1.12rem;font-weight:600;margin:4px 0 18px;line-height:1.45}
.opt{display:flex;gap:14px;align-items:flex-start;width:100%;text-align:left;padding:14px 16px;border:1.5px solid var(--ln);border-radius:12px;background:#fff;cursor:pointer;margin-bottom:10px;transition:.12s;font-size:.98rem}
.opt:hover{border-color:#b8c4e6;background:#fafbff}
.opt .l{width:28px;height:28px;border-radius:8px;background:#eef1f8;display:grid;place-items:center;font-weight:700;font-size:.85rem;flex:none;color:var(--tx2)}
.opt.sel{border-color:var(--azul2);background:var(--azul-s)}.opt.sel .l{background:var(--azul2);color:#fff}
.opt.right{border-color:var(--verde);background:var(--verde-s)}.opt.right .l{background:var(--verde);color:#fff}
.opt.wrong{border-color:var(--rojo);background:var(--rojo-s)}.opt.wrong .l{background:var(--rojo);color:#fff}
.dots{display:flex;flex-wrap:wrap;gap:6px;margin-top:18px}
.dots button{width:32px;height:32px;border-radius:8px;border:1px solid var(--ln);background:#fff;font-size:.8rem;font-weight:600;cursor:pointer}
.dots button.a{background:var(--azul-s);border-color:#b9c9f5;color:var(--azul2)}.dots button.cur{outline:2px solid var(--azul2);outline-offset:1px}
.dots button.r{background:var(--verde-s);color:var(--verde);border-color:#a9e2cb}.dots button.w{background:var(--rojo-s);color:var(--rojo);border-color:#f3b9b9}
.score{width:140px;height:140px;border-radius:50%;display:grid;place-items:center;margin:0 auto 12px;background:conic-gradient(var(--c) calc(var(--p)*1%),#e8ecf5 0)}
.score>div{width:112px;height:112px;border-radius:50%;background:#fff;display:grid;place-items:center;text-align:center}
.score b{font-size:2rem;line-height:1}.score small{color:var(--tx2);font-size:.78rem}
.expl{background:#f8f9fd;border-radius:10px;padding:10px 14px;font-size:.9rem;margin-top:-2px;margin-bottom:12px;border-left:3px solid var(--azul2)}
/* foro */
.post{display:flex;gap:12px;padding:14px 0;border-bottom:1px solid var(--ln)}.post:last-child{border-bottom:0}
.post .pb{flex:1;min-width:0}.post .pb .meta{font-size:.82rem;color:var(--tx2);margin-bottom:3px}.post .pb .meta b{color:var(--tx)}
.post.reply{margin-left:48px;padding-top:6px;border-bottom:0}
/* modal y avisos */
.modal-bg{position:fixed;inset:0;background:rgba(14,22,48,.5);backdrop-filter:blur(3px);z-index:50;display:flex;align-items:flex-start;justify-content:center;padding:5vh 16px;overflow:auto;animation:fade .15s}
.modal{background:#fff;border-radius:18px;width:100%;max-width:620px;box-shadow:0 20px 60px rgba(0,0,0,.25);animation:pop .18s}
.modal.wide{max-width:920px}
.modal .mh{display:flex;align-items:center;padding:18px 22px;border-bottom:1px solid var(--ln)}.modal .mh h3{margin:0;flex:1}
.modal .mb{padding:20px 22px;max-height:72vh;overflow:auto}.modal .mf{padding:14px 22px;border-top:1px solid var(--ln);display:flex;gap:10px;justify-content:flex-end;flex-wrap:wrap}
@keyframes fade{from{opacity:0}}@keyframes pop{from{transform:translateY(10px) scale(.98);opacity:0}}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:#14203d;color:#fff;padding:11px 18px;border-radius:12px;z-index:60;box-shadow:0 8px 30px rgba(0,0,0,.25);font-size:.92rem;animation:pop .2s;max-width:90vw}
.toast.err{background:var(--rojo)}
.notice{border-radius:12px;padding:12px 16px;font-size:.9rem;margin-bottom:14px}.notice.info{background:var(--azul-s);color:#1e3a8a}.notice.warn{background:var(--oro-s);color:#7a5300}.notice.ok{background:var(--verde-s);color:#0a6b49}.notice.bad{background:var(--rojo-s);color:#a12626}
.aviso{border-left:4px solid var(--oro);padding:12px 16px;background:#fff;border-radius:0 12px 12px 0;margin-bottom:10px;box-shadow:var(--sh)}
.qedit{border:1px solid var(--ln);border-radius:12px;padding:14px;margin-bottom:12px;background:#fbfcff}
.qedit .oprow{display:flex;gap:8px;align-items:center;margin-bottom:6px}.qedit .oprow input[type=text]{flex:1}
.mdtool{display:flex;gap:4px;margin:6px 0 -1px}
.mdtool button{border:1px solid #d5dbea;background:#f7f8fc;border-radius:7px 7px 0 0;padding:3px 9px;cursor:pointer;font-size:.8rem;font-weight:600}
.mdtool button.on{background:#fff;border-bottom-color:#fff}
.prev{border:1px solid #d5dbea;border-radius:0 10px 10px 10px;padding:12px;min-height:120px;max-height:380px;overflow:auto}
/* acceso */
.login{min-height:100vh;display:grid;grid-template-columns:1.1fr 1fr}
.login .art{background:linear-gradient(150deg,#0e2556 0%,var(--azul) 45%,#2152c9 100%);color:#fff;padding:56px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}
.login .art:before{content:"";position:absolute;width:520px;height:520px;border-radius:50%;right:-180px;bottom:-200px;background:radial-gradient(circle,rgba(242,169,0,.5),transparent 65%)}
.login .art h1{font-size:2.4rem;color:#fff;max-width:480px;line-height:1.12}.login .art p{color:#c3d0f5;max-width:440px;font-size:1.05rem}
.login .feat{display:grid;grid-template-columns:1fr 1fr;gap:12px;max-width:480px;position:relative}
.login .feat div{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:12px;padding:12px 14px;font-size:.88rem;color:#dbe4fb}
.login .feat b{display:block;color:#fff}
.login .form{display:flex;align-items:center;justify-content:center;padding:40px 24px}
.login .form>div{width:100%;max-width:380px}
.demo-creds{background:var(--oro-s);border-radius:12px;padding:12px 14px;font-size:.86rem;margin-top:18px}
.demo-creds button{margin:4px 4px 0 0}
/* responsivo */
@media (max-width:980px){.g3,.g4{grid-template-columns:repeat(2,1fr)}.login{grid-template-columns:1fr}.login .art{padding:32px;min-height:auto}.login .art h1{font-size:1.7rem}.login .feat{display:none}}
@media (max-width:760px){
  .app{grid-template-columns:1fr}.side{position:fixed;left:0;top:0;bottom:0;width:270px;z-index:40;transform:translateX(-100%);transition:.2s}
  .app.open .side{transform:none;box-shadow:0 0 0 100vmax rgba(10,18,40,.45)}
  .btn.menu-btn{display:inline-flex}.top{padding:10px 14px}.content{padding:4px 14px 70px}.demo-bar{padding:7px 14px}
  .g2,.g3{grid-template-columns:1fr}.g4{grid-template-columns:1fr 1fr}.kpi{flex-direction:column;align-items:flex-start;gap:8px}.card{padding:16px}.hello,.banner{padding:20px}.post.reply{margin-left:24px}
}
@media print{.side,.top,.demo-bar,.btn{display:none!important}.app{display:block}.card{box-shadow:none}}