:root{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{margin:0;font-size:14px}
img{max-width:100%}
[hidden]{display:none!important}

/* Layout: página exterior (cabecera, datos, seguimiento) con tema claro/oscuro; dentro, una pantalla que imita Windows con colores fijos */
:root{
  --bg:#e9edf2; --panel:#ffffff; --ink:#17212c; --muted:#566273; --line:#d3dae3;
  --accent:#1b5b96; --accent-ink:#ffffff; --accent-soft:#e3edf7;
  --ok:#1d7647; --warn:#9a5d00; --err:#b0261d;
  --f-ui:"Atkinson Hyperlegible","Segoe UI",system-ui,sans-serif; --f-mono:"JetBrains Mono",ui-monospace,Consolas,monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--bg:#10151c;--panel:#18202a;--ink:#e2e8ef;--muted:#97a3b3;--line:#2b3542;--accent:#6aa6df;--accent-ink:#0a1420;--accent-soft:#1c2b3c;--ok:#55c486;--warn:#e3a53e;--err:#f2766b;color-scheme:dark}}
:root[data-theme="dark"]{--bg:#10151c;--panel:#18202a;--ink:#e2e8ef;--muted:#97a3b3;--line:#2b3542;--accent:#6aa6df;--accent-ink:#0a1420;--accent-soft:#1c2b3c;--ok:#55c486;--warn:#e3a53e;--err:#f2766b;color-scheme:dark}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--f-ui);font-size:15px;line-height:1.45}
:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
.wrap{max-width:1360px;margin:0 auto;padding-block:16px 32px;padding-left:max(16px, env(safe-area-inset-left, 0px));padding-right:max(16px, env(safe-area-inset-right, 0px));display:flex;flex-direction:column;gap:14px}
header.top{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;justify-content:space-between}
header.top .brandrow{flex-basis:100%;display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:10px 20px;padding-bottom:10px;border-bottom:1px solid var(--line)}
header.top .brand{flex:1 1 420px;display:flex;flex-wrap:wrap;align-items:baseline;gap:0 16px;margin:0;font-weight:400}
header.top .who{display:flex;gap:8px;align-items:center;margin-left:auto}
header.top .who input,header.top .who select{font:inherit;color:inherit;background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:7px 10px;min-width:0}
header.top .who input{width:210px;max-width:100%}
header.top .free{display:inline-flex;gap:6px;align-items:center;margin-left:auto;font-size:.88rem;color:var(--muted);cursor:pointer;white-space:nowrap}
header.top .brand b{font-size:clamp(2.2rem,5vw,3.2rem);line-height:1.05;font-weight:800;letter-spacing:.03em;color:var(--accent)}
header.top .brand span{font-size:.9rem;color:var(--muted);text-wrap:balance}
header.top .labinfo{flex-basis:100%;border-left:4px solid var(--accent);padding:2px 0 2px 14px}
header.top .labinfo h2{font-size:1.25rem;margin:0;text-wrap:balance}
header.top .labinfo .sub{margin:2px 0 6px;font-size:.85rem;color:var(--muted)}
header.top .labinfo .desc{margin:0;max-width:78ch;font-size:.95rem;line-height:1.5;text-wrap:pretty}
.ctrls{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.ctrls input,.ctrls select{font:inherit;color:inherit;background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:7px 10px;min-width:0}
.ctrls input{width:200px;max-width:100%}
.btn{font:inherit;color:inherit;border:1px solid var(--line);background:var(--panel);border-radius:6px;padding:7px 12px;cursor:pointer;white-space:nowrap}
.btn:hover{border-color:var(--accent)}
.btn.pri{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn.sm{padding:4px 9px;font-size:.85rem}
.card{background:var(--panel);border:1px solid var(--line);border-radius:10px}
.data{padding:12px 16px;display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:8px 18px;margin:0}
.data div{min-width:0}
.data dt{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.data dd{margin:0;font-family:var(--f-mono);font-size:.88rem;overflow-wrap:anywhere}
.data .lvl{grid-column:1/-1;display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:.85rem;color:var(--muted)}
.pill{display:inline-block;border-radius:99px;padding:2px 10px;font-size:.78rem;font-weight:700;background:var(--accent-soft);color:var(--accent)}
.grid{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:14px;align-items:start}
@media (max-width:1020px){.grid{grid-template-columns:minmax(0,1fr)}}
.tabs{display:flex;gap:6px;margin-bottom:8px;flex-wrap:wrap}
.tab{font:inherit;color:inherit;border:1px solid var(--line);background:var(--panel);border-radius:8px;padding:6px 12px;cursor:pointer;display:flex;gap:8px;align-items:center;text-align:left}
.tab small{color:var(--muted);font-family:var(--f-mono);font-size:.76rem}
.tab[aria-selected="true"]{border-color:var(--accent);box-shadow:inset 0 -3px 0 var(--accent)}
.dot{width:8px;height:8px;border-radius:50%;background:var(--ok);flex:none}.dot.wait{background:var(--warn)}
.logcard{margin-top:14px;padding:14px 16px}
.logcard h2{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 10px}
.side{display:flex;flex-direction:column;gap:14px;min-width:0}
.side .card{padding:14px 16px}
.side h2{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 10px}
.stats{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:12px}
.stats div{display:flex;flex-direction:column}
.stats b{font-size:1.25rem;font-variant-numeric:tabular-nums;font-family:var(--f-mono)}
.stats span{font-size:.75rem;color:var(--muted)}
.prog{height:6px;border-radius:3px;background:var(--line);overflow:hidden;margin-bottom:12px}
.prog i{display:block;height:100%;background:var(--ok);transition:width .4s}
ol.steps{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
ol.steps li{display:grid;grid-template-columns:22px minmax(0,1fr);gap:6px;padding:6px;border-radius:6px;font-size:.88rem}
ol.steps .m{width:18px;height:18px;border-radius:50%;border:2px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:.65rem;font-weight:700;margin-top:1px;color:var(--muted)}
ol.steps li.done .m{background:var(--ok);border-color:var(--ok);color:#fff}
ol.steps li.done .t{color:var(--muted)}
ol.steps li.cur{background:var(--accent-soft)}
ol.steps li.cur .m{border-color:var(--accent);color:var(--accent)}
ol.steps .where{font-size:.7rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-left:6px}
ol.steps .h{grid-column:2;font-size:.84rem;margin-top:4px}
ol.steps .h code,.hintbox code{font-family:var(--f-mono);font-size:.8rem;background:var(--panel);border:1px solid var(--line);border-radius:3px;padding:0 3px}
.hintbox{font-size:.85rem;border:1px dashed var(--accent);border-radius:6px;padding:8px 10px;margin-top:8px}
.log{list-style:none;margin:0;padding:0;max-height:260px;overflow:auto;font-size:.8rem;display:flex;flex-direction:column;gap:4px}
.log li{display:grid;grid-template-columns:42px 32px minmax(0,1fr);gap:4px;align-items:baseline}
.log .tt{font-family:var(--f-mono);color:var(--muted);font-variant-numeric:tabular-nums}
.log .mm{font-size:.68rem;font-weight:700;color:var(--muted)}
.log li.err .msg{color:var(--err)}.log li.ok .msg{color:var(--ok)}.log li.warn .msg{color:var(--warn)}
/* Sin acceso (código de clase) no se enseña ninguna práctica detrás de la pantalla de entrada */
body.gated header.top .ctrls,body.gated header.top .labinfo,body.gated #student,body.gated #sessClass,body.gated #btnLogout,body.gated .wrap>.data,body.gated .wrap>.grid{display:none!important}
body.gated .modal{background:var(--bg)}
.modal{position:fixed;inset:0;background:rgba(8,14,22,.55);display:flex;align-items:center;justify-content:center;padding:16px;z-index:50}
.modal[hidden]{display:none}
.modal .card{max-width:480px;width:100%;padding:20px;max-height:90%;overflow:auto}
.modal h3{margin:0 0 6px}
.modal pre{font-family:var(--f-mono);font-size:.82rem;background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:12px;white-space:pre-wrap;user-select:all}
.big{font-size:2.4rem;font-weight:700;font-family:var(--f-mono)}
.mbtns{display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap}


/* Ruta de prácticas */
header.top details.path{margin-top:8px;font-size:.9rem}
header.top details.path summary{cursor:pointer;color:var(--accent);font-weight:600}
header.top .path h4{margin:10px 0 4px;font-size:.78rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted)}
header.top .path ol{margin:0;padding-left:22px}
header.top .path li{margin:2px 0}
header.top .path li .st{margin-left:8px;font-size:.82rem;color:var(--muted)}
header.top .path li.done .st{color:var(--ok)}
header.top .path li.locked button{color:var(--muted);cursor:not-allowed;text-decoration:none}
header.top .path li.cur button{font-weight:700}
header.top .path .soon{margin:2px 0;color:var(--muted)}
header.top .path .unl{display:flex;gap:6px;align-items:center;margin-top:10px;color:var(--muted);font-size:.85rem}
header.top .path button.lnk{border:0;background:none;padding:0;color:var(--accent);text-align:left;cursor:pointer;text-decoration:underline;font:inherit}
a.btn{text-decoration:none;display:inline-block}
.ctrls input[type=checkbox]{width:auto;padding:0;margin:0}
/* panel del profesor encima de la web (sin cambiar de página) */
.adminov{position:fixed;inset:0;z-index:80;background:var(--bg);display:flex;flex-direction:column}
.adminov .adminbar{padding:8px 12px;border-bottom:1px solid var(--line);display:flex}
.adminov iframe{flex:1;border:0;width:100%}
.lnk{background:none;border:0;padding:0;color:var(--accent);cursor:pointer;text-decoration:underline;font:inherit}
/* acceso por código de clase */
header.top .who .sclass{font-size:.85rem;color:var(--muted);white-space:nowrap}
header.top .who input[readonly]{opacity:.9;cursor:default}
.modal .card.gate{max-width:440px}
.gate label{display:block;margin-bottom:6px;color:var(--muted);font-size:.9rem}
.gate .row{display:flex;gap:8px}
.gate input[type=text],.gate input[type=password]{flex:1;min-width:0;font:inherit;color:inherit;background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:9px 11px;letter-spacing:.12em}
.gate #gpin{letter-spacing:.4em;text-align:center;font-size:1.2rem}
.gate #gq{width:100%;box-sizing:border-box;margin-bottom:8px;letter-spacing:0;text-transform:none}
.gate .names{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:6px;max-height:300px;overflow:auto;margin-bottom:8px}
.gate .names .btn{text-align:left}
.gate .gmsg{min-height:1.3em;margin:8px 0 0;color:var(--err);font-size:.9rem}
.gate .gor{text-align:center;color:var(--muted);margin:10px 0}
.gate .ghint{margin:8px 0 0;color:var(--muted);font-size:.85rem}
/* Salir: color propio para no confundirlo con los botones de práctica */
.btn.out{background:var(--err);border-color:var(--err);color:#fff;font-weight:700}
.btn.out:hover{filter:brightness(1.12);border-color:var(--err)}
.btn.out[hidden]{display:none}
input[data-secret]{-webkit-text-security:disc}
input[type=password]::-ms-reveal,input[type=password]::-ms-clear{display:none}