/* ============================================================
   catto.ar — Desarrollo de temas de la Tecnicatura en Electrónica
   Hoja compartida por todas las páginas de /publicaciones/mapa-electronica/temas/
   Paleta heredada del sistema de diseño del sitio.
   ============================================================ */

:root{
  --bg:#0d1117; --panel:#161b22; --panel2:#1c2230; --line:#2a3140;
  --txt:#e6edf3; --muted:#9aa7b4; --soft:#7d8a99;
  --accent:#58a6ff; --accent2:#1f6feb;
  --ok:#3fb950; --warn:#d29922; --hot:#f85149; --violet:#a371f7;
  --r:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:78px}
html,body{margin:0;padding:0}
body{
  background:radial-gradient(1200px 600px at 80% -10%, #1b2740 0%, var(--bg) 55%);
  background-attachment:fixed;
  color:var(--txt); font-family:"Segoe UI",system-ui,Roboto,Arial,sans-serif;
  line-height:1.62; -webkit-font-smoothing:antialiased; min-height:100vh;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

/* ---- Fondo de estrellas ---- */
.starfield{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.starfield i{position:absolute;display:block;border-radius:50%}
.starfield .mw{position:absolute;inset:0;filter:blur(12px);opacity:.8;
  background:
    radial-gradient(24% 40% at 84% 70%, rgba(216,183,140,.18), transparent 62%),
    radial-gradient(14% 24% at 88% 74%, rgba(236,150,168,.12), transparent 60%),
    radial-gradient(32% 46% at 74% 52%, rgba(150,120,95,.10), transparent 68%),
    radial-gradient(40% 56% at 62% 38%, rgba(120,140,196,.09), transparent 70%),
    radial-gradient(30% 46% at 48% 22%, rgba(112,132,188,.07), transparent 72%)}
.starfield .mw-core{position:absolute;left:84%;top:70%;width:150px;height:90px;
  transform:translate(-50%,-50%);filter:blur(7px);border-radius:50%;
  background:radial-gradient(circle at 50% 55%, rgba(240,214,170,.22), rgba(230,160,150,.09) 45%, transparent 70%)}

/* ---- Barra superior ---- */
.tbar{
  position:sticky;top:0;z-index:60;backdrop-filter:blur(8px);
  background-color:rgba(13,17,23,.86);border-bottom:1px solid var(--line);
}
.tbar .in{max-width:1240px;margin:0 auto;padding:0 22px;height:56px;
  display:flex;align-items:center;gap:14px;flex-wrap:nowrap;overflow:hidden}
.tbar .brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:15px;color:var(--txt);flex:none}
.tbar .brand:hover{text-decoration:none}
.tbar .brand .logo{width:26px;height:26px;border-radius:7px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent2),var(--violet));font-size:14px}
.tbar .sep{color:var(--line);flex:none}
.tbar .up{color:var(--muted);font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tbar .up:hover{color:var(--accent);text-decoration:none}
.tbar .anio{margin-left:auto;flex:none;font-size:11px;letter-spacing:.6px;text-transform:uppercase;
  color:var(--accent);background:rgba(31,111,235,.14);border:1px solid rgba(88,166,255,.28);
  border-radius:20px;padding:4px 11px}

/* ---- Estructura ---- */
.shell{max-width:1240px;margin:0 auto;padding:0 22px 70px;
  display:grid;grid-template-columns:236px minmax(0,1fr);gap:34px;align-items:start}
@media(max-width:980px){.shell{grid-template-columns:1fr;gap:0}}

/* ---- Índice lateral ---- */
.toc{position:sticky;top:78px;padding:26px 0 0;font-size:13px}
@media(max-width:980px){
  .toc{position:static;padding:18px 0 0;border-bottom:1px solid var(--line);margin-bottom:8px}
  .toc ol{max-height:none}
}
.toc .tl{font-size:11px;text-transform:uppercase;letter-spacing:.8px;color:var(--soft);margin-bottom:10px}
.toc ol{list-style:none;margin:0;padding:0;border-left:1px solid var(--line)}
.toc li a{display:block;padding:6px 0 6px 14px;color:var(--muted);border-left:2px solid transparent;
  margin-left:-1px;line-height:1.35}
.toc li a:hover{color:var(--txt);text-decoration:none}
.toc li a.on{color:var(--accent);border-left-color:var(--accent);font-weight:600}

/* ---- Cabecera del tema ---- */
.doc{padding:30px 0 0;min-width:0}
.crumb{font-size:12.5px;color:var(--soft);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.crumb .mt{color:var(--muted);font-weight:600}
.doc h1{margin:10px 0 0;font-size:34px;letter-spacing:-.5px;line-height:1.18}
@media(max-width:640px){.doc h1{font-size:27px}}
.lead{margin:14px 0 0;font-size:17px;color:var(--muted);max-width:70ch}
.chips{display:flex;gap:7px;flex-wrap:wrap;margin:18px 0 0}
.chip{font-size:11px;padding:3px 10px;border-radius:20px;border:1px solid var(--line);
  color:var(--muted);background:var(--panel)}
.chip.hi{color:var(--accent);border-color:rgba(88,166,255,.35);background:rgba(31,111,235,.12)}
.rule{height:1px;background:var(--line);margin:26px 0 4px;border:0}

/* ---- Secciones ---- */
.doc section{padding:26px 0 4px;scroll-margin-top:78px}
.doc h2{font-size:23px;margin:0 0 4px;letter-spacing:-.3px;display:flex;gap:12px;align-items:baseline}
.doc h2 .n{font-size:13px;font-weight:700;color:var(--accent);flex:none;
  font-variant-numeric:tabular-nums;opacity:.85}
.doc h3{font-size:16.5px;margin:26px 0 6px;color:var(--txt)}
.doc h4{font-size:14.5px;margin:18px 0 5px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.doc p{margin:11px 0;max-width:76ch}
.doc ul,.doc ol{margin:11px 0;padding-left:22px;max-width:76ch}
.doc li{margin:5px 0}
.doc strong{color:#fff;font-weight:600}
.doc em{color:var(--txt)}
code{font-family:"Cascadia Code",Consolas,"Courier New",monospace;font-size:.9em;
  background:var(--panel2);border:1px solid var(--line);border-radius:5px;padding:1px 5px;color:#9fd0ee}

/* ---- Bloques de código ---- */
pre.code{background:#11161e;border:1px solid var(--line);border-left:3px solid var(--accent);
  border-radius:10px;padding:14px 17px;margin:16px 0;overflow-x:auto;
  font-family:"Cascadia Code",Consolas,"Courier New",monospace;font-size:13px;line-height:1.6;
  color:#c9d1d9;tab-size:2}
pre.code code{background:transparent;border:0;padding:0;color:inherit;font-size:inherit}
.box pre.code{margin:12px 0}
pre.code .cap{display:block;margin-top:10px;color:var(--soft);font-size:11.5px;font-family:inherit}
.c-com{color:#7d8a99;font-style:italic}
.c-kw{color:#ff7b72}
.c-str{color:#a5d6ff}
.c-num{color:#79c0ff}
.c-fn{color:#d2a8ff}
.c-ty{color:#7ee787}
.c-pp{color:#ffa657}
.codecap{margin:-8px 0 18px;font-size:12px;color:var(--soft)}

/* ---- Cajas ---- */
.box{border:1px solid var(--line);border-radius:12px;padding:14px 17px;margin:18px 0;background:var(--panel)}
.box > :first-child{margin-top:0}
.box > :last-child{margin-bottom:0}
.box .bt{font-size:12px;font-weight:700;letter-spacing:.6px;text-transform:uppercase;margin-bottom:7px;
  display:flex;align-items:center;gap:8px}
.box.key{border-left:3px solid var(--accent);background:linear-gradient(100deg,rgba(31,111,235,.10),rgba(22,27,34,.9) 60%)}
.box.key .bt{color:var(--accent)}
.box.ojo{border-left:3px solid var(--warn);background:linear-gradient(100deg,rgba(210,153,34,.10),rgba(22,27,34,.9) 60%)}
.box.ojo .bt{color:var(--warn)}
.box.peligro{border-left:3px solid var(--hot);background:linear-gradient(100deg,rgba(248,81,73,.10),rgba(22,27,34,.9) 60%)}
.box.peligro .bt{color:var(--hot)}
.box.lab{border-left:3px solid var(--ok);background:linear-gradient(100deg,rgba(63,185,80,.09),rgba(22,27,34,.9) 60%)}
.box.lab .bt{color:var(--ok)}
.box.ejem{border-left:3px solid var(--violet);background:linear-gradient(100deg,rgba(163,113,247,.10),rgba(22,27,34,.9) 60%)}
.box.ejem .bt{color:var(--violet)}

/* ---- Fórmulas ---- */
.form{margin:20px 0;padding:16px 18px;background:var(--panel2);border:1px solid var(--line);
  border-radius:12px;text-align:center;overflow-x:auto}
.form math{font-size:21px;color:#fff}
.form .cap{display:block;margin-top:9px;font-size:12px;color:var(--soft);text-align:center}
math{font-family:"Cambria Math","Latin Modern Math",STIX,serif}
.doc p math,.doc li math,.doc td math{font-size:1.03em;color:#e8f2ff}

/* ---- Tablas ---- */
.tw{overflow-x:auto;margin:18px 0;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
table.tab{border-collapse:collapse;width:100%;font-size:13.5px;min-width:min(100%,420px)}
table.tab th,table.tab td{border-bottom:1px solid var(--line);padding:8px 13px;text-align:left;vertical-align:top}
table.tab thead th{background:var(--panel2);color:var(--muted);font-size:11.5px;
  text-transform:uppercase;letter-spacing:.5px;font-weight:600;white-space:nowrap}
table.tab tbody tr:last-child td{border-bottom:0}
table.tab tbody tr:hover{background:rgba(88,166,255,.05)}
table.tab td.c,table.tab th.c{text-align:center}
table.tab .v0{color:var(--soft)}
table.tab .v1{color:var(--ok);font-weight:700}

/* ---- Figuras ---- */
figure{margin:22px 0;padding:16px 14px 10px;background:var(--panel);border:1px solid var(--line);border-radius:12px}
figure svg{display:block;margin:0 auto;max-width:100%;height:auto}
figcaption{margin-top:11px;font-size:12.5px;color:var(--soft);text-align:center;line-height:1.5}
figcaption b{color:var(--muted)}
.svg-t{font-family:"Segoe UI",system-ui,sans-serif}

/* ---- Rejilla de dos columnas ---- */
.g2{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:18px 0}
.g3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:18px 0}
@media(max-width:760px){.g2,.g3{grid-template-columns:1fr}}
.g2 > .box,.g3 > .box{margin:0}

/* ---- Enlace en el texto hacia una herramienta interactiva del sitio ---- */
a.ref{color:var(--accent);text-decoration:none;border-bottom:1px dashed rgba(88,166,255,.5);
  padding-bottom:1px;white-space:normal}
a.ref:hover{border-bottom-style:solid;background:rgba(31,111,235,.12)}
a.ref::after{content:"↗";font-size:.78em;margin-left:2px;vertical-align:super;opacity:.75}
/* dentro de una figura SVG el bloque entero puede ser enlace */
a.figref{cursor:pointer}
a.figref rect{transition:stroke .15s,fill .15s}
a.figref:hover rect{stroke:#3fb950}
a.figref:hover text{fill:#3fb950}

/* ---- Tarjeta hacia una publicación del sitio ---- */
.pub{display:flex;gap:14px;align-items:flex-start;border:1px solid var(--line);border-radius:12px;
  padding:14px 16px;background:var(--panel);margin:18px 0;transition:border-color .15s,transform .15s}
.pub:hover{border-color:var(--accent);text-decoration:none;transform:translateY(-2px)}
.pub .ic{width:40px;height:40px;border-radius:10px;flex:none;display:grid;place-items:center;font-size:20px;
  background:linear-gradient(135deg,rgba(31,111,235,.35),rgba(163,113,247,.3));border:1px solid var(--line)}
.pub .pn{font-size:14.5px;font-weight:600;color:var(--txt)}
.pub .pd{font-size:12.5px;color:var(--muted);margin-top:3px}
.pub .go{margin-left:auto;color:var(--accent);font-size:20px;align-self:center;flex:none}

/* ---- Autoevaluación ---- */
.check{margin-top:10px}
details.q{border:1px solid var(--line);border-radius:11px;background:var(--panel);margin:10px 0;overflow:hidden}
details.q summary{cursor:pointer;padding:12px 16px;font-size:14px;font-weight:600;list-style:none;
  display:flex;gap:11px;align-items:flex-start}
details.q summary::-webkit-details-marker{display:none}
details.q summary::before{content:"?";flex:none;width:20px;height:20px;border-radius:6px;font-size:12px;
  background:var(--panel2);border:1px solid var(--line);color:var(--accent);display:grid;place-items:center;
  margin-top:1px;font-weight:700}
details.q[open] summary::before{content:"✓";color:var(--ok);border-color:rgba(63,185,80,.4)}
details.q summary:hover{background:var(--panel2)}
details.q .a{padding:2px 16px 14px 47px;font-size:13.5px;color:var(--muted);border-top:1px solid var(--line)}
details.q .a > :first-child{margin-top:11px}
details.q .a math{color:#e8f2ff}

/* ---- Navegación entre temas ---- */
.nav2{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:38px 0 0;padding-top:24px;border-top:1px solid var(--line)}
@media(max-width:640px){.nav2{grid-template-columns:1fr}}
.nav2 a{border:1px solid var(--line);border-radius:12px;padding:12px 16px;background:var(--panel);
  display:block;transition:border-color .15s}
.nav2 a:hover{border-color:var(--accent);text-decoration:none}
.nav2 .dir{font-size:11px;text-transform:uppercase;letter-spacing:.7px;color:var(--soft)}
.nav2 .tt{font-size:14px;font-weight:600;color:var(--txt);margin-top:3px}
.nav2 a.r{text-align:right}
.nav2 a.ph{visibility:hidden}

/* ---- Pie ---- */
.tfoot{max-width:1240px;margin:0 auto;padding:22px;border-top:1px solid var(--line);
  color:var(--soft);font-size:12px;line-height:1.6}
.tfoot a{color:var(--muted)}

::-webkit-scrollbar{height:11px;width:11px}
::-webkit-scrollbar-thumb{background:#30363d;border-radius:8px}
::-webkit-scrollbar-track{background:transparent}