:root{
  --bg:#F3F6F4;--surface:#FFFFFF;--surface-2:#F7FAF8;--ink:#15201C;--muted:#566860;--line:#D8E1DC;
  --accent:#1E5A47;--accent-ink:#FFFFFF;--accent-soft:#E1EEE7;--panel:#173F33;--panel-ink:#F1F6F3;
  --brass:#A97C2C;--brass-soft:#F6EEDC;--danger:#B3261E;--danger-soft:#FBE9E7;--ok:#237045;--ok-soft:#E2F2E7;
  --sans:"Instrument Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --serif:"Newsreader",Georgia,"Times New Roman",serif;
  box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0E1512;--surface:#151F1B;--surface-2:#1A2621;--ink:#E6EEEA;--muted:#98AAA2;--line:#2A3833;
  --accent:#7CC7A7;--accent-ink:#0E1512;--accent-soft:#1C3229;--panel:#12332A;--panel-ink:#EAF3EE;
  --brass:#D4A95A;--brass-soft:#2E2718;--danger:#F2877E;--danger-soft:#3A1F1C;--ok:#7CC79A;--ok-soft:#18301F;}}
:root[data-theme="dark"]{
  --bg:#0E1512;--surface:#151F1B;--surface-2:#1A2621;--ink:#E6EEEA;--muted:#98AAA2;--line:#2A3833;
  --accent:#7CC7A7;--accent-ink:#0E1512;--accent-soft:#1C3229;--panel:#12332A;--panel-ink:#EAF3EE;
  --brass:#D4A95A;--brass-soft:#2E2718;--danger:#F2877E;--danger-soft:#3A1F1C;--ok:#7CC79A;--ok-soft:#18301F;}
html{scroll-padding-top:env(safe-area-inset-top,0px);height:100%}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;min-height:100%;background:var(--bg);color:var(--ink);font:16px/1.5 var(--sans);-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
:focus-visible{outline:2px solid var(--brass);outline-offset:2px}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
.muted{color:var(--muted)}.small{font-size:14px}
img,svg{max-width:100%}

/* Shell */
.shell{display:grid;grid-template-columns:252px minmax(0,1fr);min-height:100vh}
.side{background:var(--panel);color:var(--panel-ink);position:sticky;top:0;height:100vh;display:flex;flex-direction:column;padding:24px 14px}
.brand{display:flex;gap:12px;align-items:center;padding:0 8px;margin-bottom:28px}
.brand strong{display:block;font-size:16px;line-height:1.2}
.brand small{opacity:.7;font-size:13px}
.mark{width:34px;height:38px;flex:none}
.nav{display:flex;flex-direction:column;gap:2px}
.nav a{display:flex;gap:12px;align-items:center;padding:10px 12px;border-radius:8px;color:inherit;opacity:.8;text-decoration:none;font-weight:500}
.nav a:hover{opacity:1;background:rgba(255,255,255,.06)}
.nav a.on{opacity:1;background:rgba(255,255,255,.1);box-shadow:inset 3px 0 0 var(--brass)}
.side-foot{margin-top:auto;padding:0 8px}
.who{display:flex;gap:10px;align-items:center;margin-bottom:10px}
.who strong{display:block;font-size:14px}.who small{opacity:.7;font-size:12px;word-break:break-all}
.av{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--brass);color:#fff;font-weight:700;font-size:13px;flex:none}
.side .linkbtn{color:var(--panel-ink);opacity:.85}
.proto{font-size:12px;opacity:.55;margin:14px 0 0;line-height:1.4}
.col{min-width:0}
main{padding:36px clamp(16px,4vw,48px) 64px;max-width:1100px}
.topbar{display:none}
.tabbar{display:none}
@media (max-width:899px){
  .shell{grid-template-columns:1fr}
  .side{display:none}
  .topbar{display:flex;align-items:center;gap:10px;position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:var(--panel);color:var(--panel-ink);padding:10px 16px}
  .topbar strong{flex:1;font-size:16px}
  .topbar .mark{width:28px;height:32px}
  main{padding:22px 16px 110px}
  .tabbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:5;background:var(--surface);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom,0px)}
  .tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;padding:9px 2px 8px;font-size:11px;font-weight:600;color:var(--muted);text-decoration:none;min-width:0}
  .tabbar a span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
  .tabbar a.on{color:var(--accent)}
}

/* Type & basics */
.h1{font-size:clamp(26px,4vw,34px);font-weight:600;letter-spacing:-.015em;line-height:1.15;margin:0 0 6px}
.h2{font-size:22px;font-weight:600;margin:0}
.sub{color:var(--muted);margin:0 0 26px}
.k{font-size:14px;font-weight:600;color:var(--muted);margin-bottom:10px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.a2{grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);align-items:start}
@media (max-width:899px){.a2{grid-template-columns:1fr}}
.stack>*+*{margin-top:16px}
.row-between{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap}
.big{font-size:44px;font-weight:700;letter-spacing:-.02em;line-height:1}
.big span{font-size:22px;color:var(--muted);font-weight:600}
.pbar{height:8px;border-radius:99px;background:var(--accent-soft);overflow:hidden;margin:14px 0 8px}
.pbar i{display:block;height:100%;background:var(--accent);border-radius:99px;transition:width .3s}
a.card{text-decoration:none;color:inherit;display:block}
a.card:hover{border-color:var(--accent)}
.empty{text-align:center;color:var(--muted);padding:36px 20px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:600 15px var(--sans);padding:10px 18px;border-radius:8px;border:1px solid transparent;background:var(--accent);color:var(--accent-ink);cursor:pointer;text-decoration:none;min-height:44px}
.btn:hover{filter:brightness(1.08)}
.btn:disabled{opacity:.45;cursor:default;filter:none}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.danger{background:transparent;color:var(--danger);border-color:var(--line)}
.btn.armed{background:var(--danger);color:#fff;border-color:var(--danger)}
.btn.sm{min-height:34px;padding:6px 12px;font-size:14px}
.btn.full{width:100%}
.btns{display:flex;gap:10px;flex-wrap:wrap}
.linkbtn{background:none;border:0;padding:6px 0;font:600 14px var(--sans);color:var(--accent);cursor:pointer;display:inline-flex;align-items:center;gap:8px;text-decoration:none}
.iconbtn{background:transparent;border:1px solid var(--line);color:var(--ink);width:40px;height:40px;border-radius:10px;display:grid;place-items:center;cursor:pointer;flex:none}
.iconbtn.light{border-color:rgba(255,255,255,.25);color:var(--panel-ink)}
.topbar .iconbtn{border-color:rgba(255,255,255,.2);color:var(--panel-ink);width:36px;height:36px}
.iconbtn.xs{width:30px;height:30px;border-radius:8px;border-color:transparent;color:var(--muted)}
.iconbtn.xs:hover{color:var(--danger)}

label.f{display:block;font-size:14px;font-weight:600;margin-bottom:14px}
label.f>span{display:block;margin-bottom:6px}
input,select,textarea{font:inherit;font-size:16px;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:10px 12px;width:100%;min-height:44px}
input:focus,select:focus,textarea:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}
textarea{min-height:150px;resize:vertical;line-height:1.5}
.two{display:grid;grid-template-columns:1fr 1fr;gap:0 12px}
.help{font-size:13px;color:var(--muted);font-weight:400;margin:-6px 0 14px}
.err{background:var(--danger-soft);color:var(--danger);padding:10px 12px;border-radius:8px;font-size:14px;font-weight:500}

.tag{display:inline-block;font-size:12px;font-weight:600;padding:2px 9px;border-radius:99px;background:var(--accent-soft);color:var(--accent);white-space:nowrap}
.tag.test{background:var(--brass-soft);color:var(--brass)}
.tag.ex{background:var(--surface-2);color:var(--muted);border:1px solid var(--line)}
.tag.ok{background:var(--ok-soft);color:var(--ok)}

/* Login */
.login{min-height:100vh;display:grid;grid-template-columns:1.1fr 1fr}
.login-art{position:relative;overflow:hidden;background:var(--panel);color:var(--panel-ink);padding:44px clamp(24px,5vw,64px);display:flex;flex-direction:column;justify-content:space-between;gap:40px}
.login-art>*{position:relative}
.topo{position:absolute;inset:0;width:100%;height:100%}
.pitch h1{font-size:clamp(28px,3.6vw,44px);line-height:1.1;letter-spacing:-.02em;font-weight:600;margin:0 0 16px;max-width:15ch}
.pitch p{opacity:.8;max-width:40ch;margin:0;font-size:17px}
.login-art small{opacity:.65}
.login-form{display:grid;place-items:center;padding:40px 24px}
.lf{width:100%;max-width:380px}
.lf h2{font-size:26px;margin:0 0 6px;letter-spacing:-.01em}
.demo{margin-top:26px;padding:14px;border:1px dashed var(--line);border-radius:10px;font-size:14px}
.demo strong{display:block;margin-bottom:6px}
.demo button{display:block;width:100%;text-align:left;background:none;border:0;padding:6px 0;color:var(--accent);font:500 14px var(--sans);cursor:pointer}
@media (max-width:899px){
  .login{grid-template-columns:1fr}
  .login-art{padding:28px 22px;gap:22px}
  .pitch h1{font-size:26px}
  .pitch p{font-size:15px}
  .login-art small{display:none}
  .login-form{place-items:start center;padding:28px 20px 48px}
}

/* Semana */
.week-hero{background:var(--panel);color:var(--panel-ink);border-radius:18px;padding:22px 22px 18px;margin-bottom:20px}
.wh-top{display:flex;align-items:center;gap:14px}
.wh-top>div{flex:1;min-width:0}
.wh-k{font-size:14px;opacity:.72;font-weight:500}
.week-hero h1{margin:2px 0 0;font-size:clamp(22px,3.4vw,30px);letter-spacing:-.015em;font-weight:600;line-height:1.15}
.wh-count{margin:16px 0 0;opacity:.9}
.wh-count strong{color:var(--brass)}
@media (prefers-color-scheme:dark){.wh-count strong{color:var(--brass)}}
.wh-note{margin:14px 0 0;padding:12px 14px;border-left:3px solid var(--brass);background:rgba(255,255,255,.07);border-radius:0 8px 8px 0;font-family:var(--serif);font-size:17px;line-height:1.5}
.wh-note b{display:block;font-family:var(--sans);font-size:13px;opacity:.7;font-weight:600;margin-bottom:2px}
.dayband{display:grid;grid-template-columns:repeat(7,1fr);gap:8px;margin-top:18px}
.dayband .d{display:flex;flex-direction:column;align-items:center;gap:6px;font-size:12px;font-weight:600;opacity:.85}
.dayband .bar{position:relative;width:100%;height:54px;border-radius:7px;background:rgba(255,255,255,.1);overflow:hidden}
.dayband .bar.none{background:transparent;border:1px dashed rgba(255,255,255,.18)}
.dayband .bar i{position:absolute;left:0;right:0;bottom:0;background:var(--brass);transition:height .35s}
.dayband .today{opacity:1}
.dayband .today .bar{box-shadow:0 0 0 2px var(--panel-ink)}
.days{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(290px,1fr))}
.day h3{display:flex;justify-content:space-between;align-items:baseline;font-size:16px;margin:0 0 4px}
.day h3 small{color:var(--muted);font-weight:600;font-size:13px}
.day.is-today{border-color:var(--accent);box-shadow:inset 0 3px 0 var(--accent)}
.task{display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-top:1px solid var(--line)}
.day .task:first-of-type{border-top:0}
.tb{flex:1;min-width:0}
.tt{font-weight:500}
.tm{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:4px}
.tm a,.tm .linkbtn{font-size:13px;padding:0}
.task.done .tt{text-decoration:line-through;color:var(--muted)}
.check{appearance:none;-webkit-appearance:none;width:24px;height:24px;min-height:24px;padding:0;margin:1px 0 0;border:2px solid var(--muted);border-radius:6px;flex:none;cursor:pointer;display:grid;place-content:center;background:var(--surface)}
.check:checked{background:var(--accent);border-color:var(--accent)}
.check:checked::after{content:"";width:6px;height:11px;border:solid var(--accent-ink);border-width:0 2.5px 2.5px 0;transform:translate(0,-1px) rotate(45deg)}
.check:disabled{cursor:default}
.status{width:22px;height:22px;border-radius:50%;flex:none;display:grid;place-items:center;border:2px solid var(--line);margin-top:1px}
.status.on{background:var(--ok);border-color:var(--ok);color:#fff}

/* Temario */
.bloque+.bloque{margin-top:26px}
.bloque h2{font-size:15px;color:var(--muted);font-weight:600;margin:0 0 10px}
.trow{display:flex;align-items:center;gap:14px;padding:14px 16px;background:var(--surface);border:1px solid var(--line);border-radius:12px;text-decoration:none;color:inherit;margin-bottom:8px}
.trow:hover{border-color:var(--accent)}
.tn{width:34px;height:34px;flex:none;border-radius:8px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-weight:700}
.trow .tt{flex:1;min-width:0}
.trow small{display:block;color:var(--muted);font-size:13px;font-weight:400}
.trow>svg{color:var(--muted);flex:none}
.back{display:inline-flex;align-items:center;gap:4px;font-weight:600;font-size:14px;text-decoration:none;margin-bottom:16px}
.reader{font-family:var(--serif);font-size:19px;line-height:1.65;max-width:66ch}
.reader p{margin:0 0 1em}
.reader h3{font-family:var(--sans);font-size:18px;font-weight:600;margin:1.8em 0 .5em;letter-spacing:-.005em}
.reader ul{padding-left:1.2em;margin:0 0 1em}
.reader li{margin-bottom:.35em}
.tema-actions{display:flex;gap:10px;flex-wrap:wrap;margin:28px 0 0;padding-top:20px;border-top:1px solid var(--line)}

/* Tests */
.seg{display:flex;gap:6px;flex-wrap:wrap}
.seg button{min-height:40px;padding:6px 16px;border-radius:8px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:600 15px var(--sans);cursor:pointer}
.seg button.on{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.test-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px}
.timer{font-variant-numeric:tabular-nums;font-weight:600;font-size:18px;padding:6px 12px;border-radius:8px;background:var(--surface);border:1px solid var(--line)}
.q{font-size:19px;font-weight:500;line-height:1.45;margin:0 0 18px}
.opt{display:flex;gap:12px;align-items:flex-start;width:100%;text-align:left;padding:13px 14px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);font:inherit;cursor:pointer;margin-bottom:10px;min-height:52px;transition:border-color .15s,background .15s}
.opt:hover{border-color:var(--accent)}
.opt b{flex:none;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--surface-2);border:1px solid var(--line);font-size:14px}
.opt span{padding-top:2px}
.opt.sel{border-color:var(--accent);background:var(--accent-soft)}
.opt.sel b{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.opt.right{border-color:var(--ok);background:var(--ok-soft)}
.opt.right b{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.wrong{border-color:var(--danger);background:var(--danger-soft)}
.opt.wrong b{background:var(--danger);border-color:var(--danger);color:#fff}
.opt:disabled{cursor:default}
.test-nav{display:flex;justify-content:space-between;gap:10px;margin:16px 0}
.dots{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.dots button{width:34px;height:34px;border-radius:8px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:600 13px var(--sans);cursor:pointer}
.dots .a{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}
.dots .cur{box-shadow:0 0 0 2px var(--brass)}
.warn{background:var(--brass-soft);color:var(--ink);border-radius:8px;padding:10px 12px;font-size:14px;margin-bottom:10px}
.score-card{display:flex;gap:28px;align-items:center;flex-wrap:wrap}
.score{font-size:72px;font-weight:700;line-height:.9;letter-spacing:-.03em}
.score small{font-size:24px;color:var(--muted);font-weight:600}
.stats{display:flex;gap:24px;flex-wrap:wrap}
.stats div{font-size:14px;color:var(--muted)}
.stats strong{display:block;font-size:24px;color:var(--ink)}
.stats .s-ok strong{color:var(--ok)}.stats .s-ko strong{color:var(--danger)}
.review{margin-top:20px}
.rq{padding:18px 0;border-top:1px solid var(--line)}
.rq .q{font-size:17px}
.exp{font-size:15px;color:var(--muted);background:var(--surface-2);border-radius:8px;padding:10px 12px;margin:4px 0 0}
.res-row,.srow,.qrow{display:flex;gap:14px;align-items:center;padding:13px 0;border-top:1px solid var(--line);flex-wrap:wrap}
.card .res-row:first-of-type,.card .srow:first-of-type,.card .qrow:first-of-type{border-top:0}
.grow{flex:1;min-width:180px}
.grow small{display:block;color:var(--muted);font-size:13px}
.nota{font-weight:700;font-size:20px;min-width:52px;text-align:right}
.stat{text-align:center;min-width:70px}
.stat span{display:block;font-weight:700;font-size:18px}
.stat small{color:var(--muted);font-size:12px}
.acts{display:flex;gap:8px;flex-wrap:wrap}

/* Ejercicios */
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:18px}
.tabs a{text-decoration:none;display:inline-flex;align-items:center}
.tabs button,.tabs a{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:99px;padding:8px 16px;font:600 14px var(--sans);cursor:pointer;min-height:40px}
.tabs a.on,.tabs button.on{background:var(--panel);color:var(--panel-ink);border-color:var(--panel)}
.tabs a small,.tabs button small{opacity:.7;font-weight:500;margin-left:4px}
.ex+.ex{margin-top:14px}
.exsecs{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
a.card.exsec{display:flex;gap:16px;align-items:center}
.exsec strong{font-size:18px}
.exsec small{display:block;color:var(--muted);font-size:13px}
.exsec .pbar{margin:12px 0 6px}
.exsec>svg{color:var(--muted);flex:none}
.glyph{width:56px;height:56px;border-radius:14px;background:var(--panel);color:var(--brass);display:grid;place-items:center;font-weight:700;font-size:20px;flex:none;letter-spacing:-.02em}
.glyph.sm{width:30px;height:30px;border-radius:8px;font-size:12px}
.exadm+.exadm{margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}
.exadm h3{display:flex;align-items:center;gap:10px;font-size:17px;margin:0}
.exadm h3 small{color:var(--muted);font-weight:500;font-size:14px}

/* Admin programación */
.plan-top{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-bottom:18px}
.plan-top select{max-width:280px}
.wknav{display:flex;align-items:center;gap:8px;font-weight:600}
.pday h3{font-size:15px;margin:0 0 6px;display:flex;justify-content:space-between}
.pday h3 small{color:var(--muted);font-weight:500}
.ptask{display:flex;gap:10px;align-items:flex-start;padding:9px 0;border-top:1px solid var(--line);font-size:15px}
.pday .ptask:first-of-type{border-top:0}
.pempty{font-size:14px;color:var(--muted);margin:4px 0 0}
.fmt{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;background:var(--surface-2);border:1px solid var(--line);border-radius:8px;padding:10px 12px;white-space:pre-wrap;color:var(--muted);margin:0 0 14px}
.correct{color:var(--ok);font-weight:600}

.pdfcard{margin-bottom:24px;max-width:900px}
.pdfhead{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.pdfhead small{display:block;color:var(--muted);font-size:13px}
.pdfico{width:40px;height:48px;border-radius:6px;background:var(--danger-soft);color:var(--danger);display:grid;place-items:center;font-weight:700;font-size:12px;flex:none}
.pdfbox{margin-top:16px;background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:10px}
.pdfpage{display:block;width:100%;height:auto;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.18);border-radius:3px}
.pdfpage+.pdfpage{margin-top:10px}
.chk{display:flex;gap:8px;align-items:center;font-size:14px;margin:-4px 0 14px;cursor:pointer}
.chk input{width:auto;min-height:0}
input[type=file]{padding:8px;cursor:pointer}
.badgecard{display:grid;grid-template-columns:210px minmax(0,1fr);gap:28px;align-items:center;margin-bottom:16px}
.badgewrap svg{display:block;width:100%;height:auto}
.rank{font-size:18px;font-weight:600;color:var(--brass);margin:8px 0 14px}
.bc-list{list-style:none;padding:0;margin:0 0 16px;display:grid;gap:8px;font-size:15px;color:var(--muted)}
.bc-list strong{color:var(--ink);font-weight:600}
@media (max-width:640px){.badgecard{grid-template-columns:1fr;gap:12px}.badgewrap{width:190px;margin:0 auto}}
.toast{position:fixed;left:50%;bottom:calc(88px + env(safe-area-inset-bottom,0px));transform:translate(-50%,20px);background:var(--ink);color:var(--bg);padding:10px 18px;border-radius:10px;font-weight:600;font-size:14px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:20;max-width:calc(100% - 32px)}
.toast.show{opacity:1;transform:translate(-50%,0)}
@media (min-width:900px){.toast{bottom:28px}}

.loading{min-height:100vh;display:grid;place-items:center;color:var(--muted);font-weight:500}
.flash{background:var(--ok-soft);color:var(--ink);border:1px solid var(--ok);border-radius:10px;padding:12px 14px;margin:0 0 16px;font-size:15px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:1.05em;letter-spacing:.02em;user-select:all}
.side-foot a.linkbtn{color:var(--panel-ink);opacity:.85}
.topbar a.iconbtn{text-decoration:none}