:root{
  --teal:#0E8EA5; --teal-dark:#0E7485; --teal-deep:#0A3A44; --teal-night:#072932;
  --green:#04AC4F; --green-soft:#E4F6EB;
  --ink:#1C1C1A; --ink-soft:#4A5558; --ink-mute:#7A8A8E;
  --paper:#F3F8F9; --paper2:#E6F1F3; --white:#fff;
  --line:rgba(14,116,133,.16); --line2:rgba(14,116,133,.28);
  --amber:#B8791A; --amber-soft:#FDF3E0;
  --r:14px; --nav:270px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Nunito',system-ui,sans-serif;background:var(--paper);color:var(--ink);
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
a{color:var(--teal-dark)}
:focus-visible{outline:3px solid var(--green);outline-offset:2px;border-radius:6px}

/* ══════ LOGIN ══════ */
.login{min-height:100vh;display:grid;grid-template-columns:1.05fr .95fr}
.login-art{
  background:var(--teal-night);color:#DDEEF1;padding:56px 52px;
  display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden;
}
.login-art .logo{height:44px;width:auto;display:block}
.logo-plate{background:#fff;border-radius:11px;padding:11px 15px;display:inline-block;position:relative;z-index:2;align-self:flex-start}
.login-art h1{font-size:38px;font-weight:900;line-height:1.1;letter-spacing:-.02em;margin:0 0 14px;position:relative;z-index:2}
.login-art p{color:#9FC4CC;font-size:17px;margin:0;max-width:34ch;position:relative;z-index:2}
.login-art .rings{position:absolute;right:-140px;bottom:-120px;width:460px;height:460px;opacity:.5}
.login-art .rings circle{fill:none;stroke:#12495A;stroke-width:9}
.login-art .rings .core{fill:var(--green);stroke:none}
.login-art .meta{font-size:13.5px;color:#7FA3AC;position:relative;z-index:2}
.login-form{display:flex;align-items:center;justify-content:center;padding:40px 32px;background:var(--white)}
.login-box{width:100%;max-width:380px}
.login-box h2{font-size:26px;font-weight:900;margin:0 0 8px;letter-spacing:-.02em}
.login-box .sub{color:var(--ink-soft);font-size:15.5px;margin:0 0 26px}
label{display:block;font-size:13.5px;font-weight:800;margin-bottom:6px}
input[type=email],input[type=text],input[type=password],textarea,select{
  width:100%;font-family:inherit;font-size:16px;padding:13px 15px;
  border:1.5px solid #D7E4E7;border-radius:11px;background:var(--white);color:var(--ink);
}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 3px rgba(14,142,165,.15)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--green);color:#fff;font-weight:800;font-size:15.5px;
  padding:13px 26px;border-radius:100px;transition:background .15s,transform .15s;
}
.btn:hover{background:#039444;transform:translateY(-1px)}
.btn:disabled{opacity:.55;cursor:default;transform:none}
.btn-w{width:100%}
.btn-sm{font-size:14px;padding:9px 18px}
.btn-ghost{background:transparent;color:var(--teal-dark);border:1.5px solid var(--line2)}
.btn-ghost:hover{background:var(--paper2);transform:none}
.btn-dark{background:var(--teal-deep)}
.btn-dark:hover{background:#0d4b58}
.eye{position:absolute;right:14px;top:50%;transform:translateY(-50%);font-size:13px;font-weight:800;color:var(--teal-dark)}
.chk{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--ink-soft);font-weight:600;cursor:pointer}
.chk input{width:18px;height:18px;flex-shrink:0;margin-top:2px;accent-color:var(--green)}
.sw{display:flex;gap:14px;align-items:flex-start;padding:15px 0;border-bottom:1px solid var(--line)}
.sw:last-of-type{border-bottom:none}
.sw .tx{flex:1}
.sw h4{margin:0 0 3px;font-size:15px;font-weight:800}
.sw p{margin:0;font-size:13.5px;color:var(--ink-soft)}
.sw .tg{width:46px;height:26px;border-radius:100px;background:#D2E0E3;position:relative;flex-shrink:0;cursor:pointer;transition:background .18s;border:none}
.sw .tg:after{content:"";position:absolute;left:3px;top:3px;width:20px;height:20px;border-radius:50%;background:#fff;transition:transform .18s;box-shadow:0 1px 3px rgba(0,0,0,.22)}
.sw .tg.on{background:var(--green)}
.sw .tg.on:after{transform:translateX(20px)}
.login-note{font-size:13.5px;color:var(--ink-mute);margin-top:20px;line-height:1.5}
.sent{background:var(--green-soft);border-radius:12px;padding:20px;font-size:15px;color:#0A5C2E}
.sent b{display:block;margin-bottom:5px}
@media(max-width:860px){
  .login{grid-template-columns:1fr}
  .login-art{padding:34px 26px;min-height:auto}
  .login-art h1{font-size:27px}
  .login-art p{font-size:15px}
  .login-art .rings{width:280px;height:280px;right:-90px;bottom:-90px}
  .login-art .logo{height:40px}
}

/* ══════ APP SHELL ══════ */
.app{display:none;min-height:100vh}
.app.on{display:block}
.side{
  position:fixed;left:0;top:0;bottom:0;width:var(--nav);background:var(--teal-night);
  color:#DDEEF1;padding:24px 18px;display:flex;flex-direction:column;z-index:40;
}
.side .brand{display:flex;align-items:center;gap:11px;padding:0 8px 22px;margin-bottom:6px;border-bottom:1px solid rgba(255,255,255,.11)}
.side .brand .logo-plate{background:#fff;border-radius:9px;padding:7px 10px;flex-shrink:0}
.side .brand img{height:26px;width:auto;flex-shrink:0}
.side .brand span{font-size:11.5px;font-weight:800;letter-spacing:.11em;text-transform:uppercase;color:#7FD3E2;line-height:1.35}
.side nav{display:flex;flex-direction:column;gap:2px;margin-top:16px;flex:1}
.side nav button{
  display:flex;align-items:center;gap:12px;padding:11px 13px;border-radius:10px;
  font-size:15px;font-weight:700;color:#9FC4CC;text-align:left;transition:background .15s,color .15s;
}
.side nav button:hover{background:rgba(255,255,255,.07);color:#fff}
.side nav button.on{background:var(--teal-dark);color:#fff}
.side nav button svg{width:19px;height:19px;flex-shrink:0;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.side .badge{margin-left:auto;background:var(--green);color:#fff;font-size:11px;font-weight:900;padding:2px 7px;border-radius:100px}
.side .who{border-top:1px solid rgba(255,255,255,.11);padding-top:15px;display:flex;align-items:center;gap:11px}
.side .who .av{width:36px;height:36px;border-radius:50%;background:var(--teal);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:14px;flex-shrink:0}
.side .who .nm{font-size:14px;font-weight:800;color:#fff;line-height:1.25}
.side .who .cn{font-size:12px;color:#7FA3AC}
.side .who button{margin-left:auto;color:#7FA3AC;font-size:12px;font-weight:700}

.main{margin-left:var(--nav);padding:34px 40px 60px;max-width:1140px}
.topbar{display:none}
.mobnav{display:none}

@media(max-width:960px){
  .side{display:none}
  .main{margin-left:0;padding:16px 18px 96px}
  .topbar{
    display:flex;align-items:center;gap:12px;padding:11px 18px;background:var(--teal-night);
    position:sticky;top:0;z-index:40;
  }
  .topbar .logo-plate{background:#fff;border-radius:7px;padding:5px 8px;flex-shrink:0}
.topbar img{height:21px;width:auto;flex-shrink:0}
  .topbar .t{font-size:11px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:#7FD3E2}
  .topbar .av{margin-left:auto;width:33px;height:33px;border-radius:50%;background:var(--teal);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:13px}
  .mobnav{
    display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;
    background:var(--white);border-top:1px solid var(--line);z-index:45;
    padding-bottom:env(safe-area-inset-bottom);
  }
  .mobnav button{display:flex;flex-direction:column;align-items:center;gap:3px;padding:9px 2px 8px;font-size:10.5px;font-weight:700;color:var(--ink-mute)}
  .mobnav button svg{width:21px;height:21px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
  .mobnav button.on{color:var(--teal-dark)}
  .mobnav button .dot{position:absolute;margin:-2px 0 0 15px;width:7px;height:7px;border-radius:50%;background:var(--green)}
}

/* ══════ COMPONENTES ══════ */
.page{display:none;animation:fade .28s ease}
.page.on{display:block}
@keyframes fade{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:none}}
.h1{font-size:29px;font-weight:900;letter-spacing:-.025em;margin:0 0 5px;line-height:1.15}
.h2{font-size:20px;font-weight:800;margin:34px 0 14px;letter-spacing:-.015em}
.lead{color:var(--ink-soft);font-size:16px;margin:0 0 26px}
.eyebrow{font-size:11.5px;font-weight:900;letter-spacing:.15em;text-transform:uppercase;color:var(--teal-dark);margin:0 0 9px}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.muted{color:var(--ink-soft);font-size:14.5px}
.pill{display:inline-block;font-size:11.5px;font-weight:900;letter-spacing:.06em;text-transform:uppercase;padding:4px 11px;border-radius:100px}
.pill-live{background:var(--green);color:#fff}
.pill-ok{background:var(--green-soft);color:#0A6B39}
.pill-now{background:#DCEFF3;color:#0A5C6B}
.pill-lock{background:var(--paper2);color:var(--ink-mute)}
.pill-soon{background:var(--amber-soft);color:var(--amber)}

/* progreso */
.bar{height:9px;border-radius:100px;background:var(--paper2);overflow:hidden}
.bar i{display:block;height:100%;background:var(--green);border-radius:100px;transition:width .8s cubic-bezier(.4,0,.2,1)}
.ring{transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:9;stroke-linecap:round}
.ring .bgc{stroke:var(--paper2)}
.ring .fgc{stroke:var(--green);transition:stroke-dashoffset 1s cubic-bezier(.4,0,.2,1)}

/* hero del inicio */
.hero{
  background:linear-gradient(135deg,var(--teal-deep),var(--teal-night));
  color:#DDEEF1;border-radius:18px;padding:30px 32px;margin-bottom:26px;
  display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;position:relative;overflow:hidden;
}
.hero h1{font-size:26px;font-weight:900;color:#fff;margin:0 0 7px;letter-spacing:-.02em;position:relative;z-index:2}
.hero p{margin:0;color:#9FC4CC;font-size:15.5px;position:relative;z-index:2;max-width:46ch}
.hero .pg{text-align:center;position:relative;z-index:2}
.hero .pg .n{font-size:26px;font-weight:900;color:#fff;line-height:1}
.hero .pg .l{font-size:11.5px;color:#9FC4CC;font-weight:700;margin-top:3px}
@media(max-width:700px){.hero{grid-template-columns:1fr;padding:22px;gap:18px}.hero h1{font-size:21px}}

/* grillas */
.g2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.g3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:820px){.g2,.g3{grid-template-columns:1fr}}

/* próxima clase */
.next{border-left:4px solid var(--green);display:flex;gap:20px;align-items:center}
.next .d{text-align:center;flex-shrink:0}
.next .d .m{font-size:11.5px;font-weight:900;text-transform:uppercase;color:var(--teal-dark);letter-spacing:.07em}
.next .d .n{font-size:33px;font-weight:900;line-height:1;letter-spacing:-.03em}
.next .i{flex:1;min-width:0}
.next .i h3{margin:0 0 4px;font-size:17px;font-weight:800;line-height:1.3}
@media(max-width:560px){.next{flex-direction:column;align-items:flex-start;gap:12px}}

/* módulos */
.mods{display:flex;flex-direction:column;gap:10px}
.mod{
  background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:17px 20px;
  display:grid;grid-template-columns:52px 1fr auto;gap:17px;align-items:center;
  text-align:left;width:100%;transition:border-color .15s,transform .15s;
}
.mod:not(.locked):hover{border-color:var(--teal);transform:translateX(3px)}
.mod.locked{opacity:.62;cursor:default}
.mod .num{
  width:44px;height:44px;border-radius:12px;background:var(--paper2);color:var(--teal-dark);
  display:flex;align-items:center;justify-content:center;font-weight:900;font-size:17px;
}
.mod.done .num{background:var(--green-soft);color:var(--green)}
.mod.now .num{background:var(--teal);color:#fff}
.mod h3{margin:0 0 3px;font-size:16px;font-weight:800;line-height:1.35}
.mod .meta{font-size:13px;color:var(--ink-soft);font-weight:600}
.mod .rt{display:flex;align-items:center;gap:13px;flex-shrink:0}
.mod .minibar{width:74px}
@media(max-width:640px){
  .mod{grid-template-columns:44px 1fr;gap:13px}
  .mod .rt{grid-column:1/-1;justify-content:space-between;margin-top:4px}
  .mod .minibar{width:120px}
}

/* detalle de módulo */
.back{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:800;color:var(--teal-dark);margin-bottom:16px}
.player{
  background:#0A1518;border-radius:var(--r);aspect-ratio:16/9;display:flex;
  align-items:center;justify-content:center;flex-direction:column;gap:12px;color:#7FA3AC;position:relative;overflow:hidden;
}
.player .play{width:66px;height:66px;border-radius:50%;background:rgba(255,255,255,.13);display:flex;align-items:center;justify-content:center}
.player .play svg{width:26px;height:26px;fill:#fff;margin-left:4px}
.player .t{font-size:13.5px}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin:26px 0 20px;overflow-x:auto}
.tabs button{padding:11px 17px;font-size:14.5px;font-weight:800;color:var(--ink-mute);border-bottom:3px solid transparent;white-space:nowrap}
.tabs button.on{color:var(--teal-dark);border-bottom-color:var(--teal)}
.tabs button .c{background:var(--paper2);color:var(--teal-dark);font-size:11px;padding:1px 7px;border-radius:100px;margin-left:5px;font-weight:900}
.tabp{display:none}
.tabp.on{display:block}

/* lecturas */
.read{display:flex;gap:14px;align-items:flex-start;padding:15px 0;border-bottom:1px solid var(--line)}
.read:last-child{border-bottom:none}
.read .ic{width:38px;height:38px;border-radius:10px;background:var(--paper2);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.read .ic svg{width:18px;height:18px;stroke:var(--teal-dark);fill:none;stroke-width:2}
.read h4{margin:0 0 3px;font-size:15px;font-weight:800;line-height:1.35}
.read p{margin:0;font-size:13.5px;color:var(--ink-soft)}

/* foro */
.post{border:1px solid var(--line);border-radius:var(--r);background:var(--white);padding:18px 20px;margin-bottom:12px}
.post .hd{display:flex;align-items:center;gap:11px;margin-bottom:10px}
.post .av{width:38px;height:38px;border-radius:50%;background:var(--teal);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:13.5px;flex-shrink:0;overflow:hidden}
.post .av img{width:100%;height:100%;object-fit:cover}
.post .nm{font-size:14.5px;font-weight:800;line-height:1.25}
.post .tm{font-size:12.5px;color:var(--ink-mute)}
.post .tag{font-size:10.5px;font-weight:900;letter-spacing:.06em;text-transform:uppercase;padding:2px 8px;border-radius:100px;background:var(--teal-deep);color:#fff}
.post .bd{font-size:15px;color:var(--ink-soft);margin:0}
.post .ft{display:flex;gap:16px;margin-top:13px;padding-top:12px;border-top:1px solid var(--line)}
.post .ft button{font-size:13px;font-weight:800;color:var(--ink-mute);display:flex;align-items:center;gap:6px}
.post .ft button:hover{color:var(--teal-dark)}
.reply{margin-left:30px;border-left:3px solid var(--paper2);padding-left:18px;margin-top:12px}
.reply.doc{border-left-color:var(--green);background:var(--green-soft);border-radius:0 10px 10px 0;padding:15px 18px}
.reply .hd{margin-bottom:7px}
.reply .av{width:31px;height:31px;font-size:12px}
.composer{border:1.5px solid var(--line2);border-radius:var(--r);padding:15px;background:var(--white);margin-bottom:22px}
.composer textarea{border:none;padding:0;resize:vertical;min-height:66px;font-size:15px}
.composer textarea:focus{box-shadow:none}
.composer .cf{display:flex;align-items:center;justify-content:space-between;margin-top:11px;padding-top:11px;border-top:1px solid var(--line)}
.composer .cf small{color:var(--ink-mute);font-size:12.5px}

/* evaluación */
.quiz-q{background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:24px;margin-bottom:14px}
.quiz-q .qn{font-size:11.5px;font-weight:900;letter-spacing:.1em;text-transform:uppercase;color:var(--teal-dark);margin-bottom:8px}
.quiz-q h3{margin:0 0 17px;font-size:17px;font-weight:800;line-height:1.4}
.opt{display:flex;gap:12px;align-items:flex-start;padding:13px 15px;border:1.5px solid var(--line);border-radius:11px;margin-bottom:9px;cursor:pointer;transition:border-color .15s,background .15s}
.opt:hover{border-color:var(--teal)}
.opt.sel{border-color:var(--teal);background:#F2FAFB}
.opt .k{width:25px;height:25px;border-radius:50%;border:1.5px solid var(--line2);display:flex;align-items:center;justify-content:center;font-size:12.5px;font-weight:900;flex-shrink:0;color:var(--ink-soft)}
.opt.sel .k{background:var(--teal);border-color:var(--teal);color:#fff}
.opt span{font-size:15px}

/* perfil */
.prof-hd{display:flex;gap:22px;align-items:center;margin-bottom:26px}
.prof-hd .av{width:78px;height:78px;border-radius:50%;background:var(--teal);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:27px;flex-shrink:0}
.kv{display:flex;justify-content:space-between;gap:16px;padding:13px 0;border-bottom:1px solid var(--line);font-size:15px}
.kv:last-child{border-bottom:none}
.kv b{font-weight:800}
.kv span{color:var(--ink-soft);text-align:right}
.req{display:flex;gap:13px;align-items:flex-start;padding:14px 0;border-bottom:1px solid var(--line)}
.req:last-child{border-bottom:none}
.req .ck{width:25px;height:25px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:900}
.req .ck.ok{background:var(--green);color:#fff}
.req .ck.no{background:var(--paper2);color:var(--ink-mute)}
.req h4{margin:0 0 2px;font-size:15px;font-weight:800}
.req p{margin:0;font-size:13.5px;color:var(--ink-soft)}

/* novedades */
.news{display:flex;gap:15px;padding:16px 0;border-bottom:1px solid var(--line)}
.news:last-child{border-bottom:none}
.news .dt{font-size:12px;font-weight:800;color:var(--ink-mute);white-space:nowrap;padding-top:2px;width:62px;flex-shrink:0}
.news h4{margin:0 0 3px;font-size:15px;font-weight:800}
.news p{margin:0;font-size:14px;color:var(--ink-soft)}

.empty{text-align:center;padding:44px 20px;color:var(--ink-mute)}
.empty svg{width:44px;height:44px;stroke:var(--line2);fill:none;stroke-width:1.5;margin:0 auto 14px}
.demo{
  background:var(--amber-soft);border:1px solid #F0DCA8;color:#6B5320;
  border-radius:11px;padding:12px 18px;font-size:13.5px;font-weight:700;margin-bottom:22px;
}

/* ══════ extras del campus real ══════ */
.alert{border-radius:11px;padding:13px 17px;font-size:14.5px;font-weight:600;margin-bottom:18px}
.alert-err{background:#FDECEC;border:1px solid #F3BDBD;color:#8C2020}
.alert-ok{background:var(--green-soft);border:1px solid #BFE8CF;color:#0A5C2E}
.alert-info{background:var(--paper2);border:1px solid var(--line2);color:var(--teal-deep)}
.loading{text-align:center;padding:60px;color:var(--ink-mute)}
.spin{width:34px;height:34px;border:3px solid var(--paper2);border-top-color:var(--teal);border-radius:50%;margin:0 auto 14px;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.tbl{width:100%;border-collapse:collapse;font-size:14px}
.tbl th,.tbl td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
.tbl th{font-weight:800;font-size:12.5px;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-soft);background:var(--paper)}
.tbl td .btn-sm{padding:6px 13px;font-size:13px}
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--white)}
.field{margin-bottom:15px}
.field label{margin-bottom:5px}
.field small{display:block;color:var(--ink-mute);font-size:12.5px;margin-top:4px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.stat{background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px}
.stat .n{font-size:30px;font-weight:900;color:var(--teal-dark);line-height:1}
.stat .l{font-size:13px;color:var(--ink-soft);font-weight:700;margin-top:5px}
.vimeo{position:relative;aspect-ratio:16/9;border-radius:var(--r);overflow:hidden;background:#0A1518}
.vimeo iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.rolepill{font-size:10.5px;font-weight:900;letter-spacing:.06em;text-transform:uppercase;padding:2px 8px;border-radius:100px;background:var(--paper2);color:var(--teal-dark)}
.rolepill.admin{background:var(--teal-deep);color:#fff}
.rolepill.docente{background:var(--green-soft);color:#0A6B39}
.side nav .sep{border-top:1px solid rgba(255,255,255,.11);margin:10px 0 6px}
.g4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media(max-width:820px){.g4{grid-template-columns:1fr 1fr}}
input[type=file]{font-size:14px}
input[type=number]{width:100%;font-family:inherit;font-size:16px;padding:12px 14px;border:1.5px solid #D7E4E7;border-radius:11px}