/* RUTA DIAN 2027 · estilos de la app de estudio.
   Estructura de componentes de Ruta al Nombramiento (resumen, caso, analogía, chequeo, opciones, explicación);
   paleta propia (D85). Contraste AA verificado con docs/contraste.py. */
:root{
  --petrol:#0f3b47; --petrol-2:#15505f; --petrol-3:#1d6676;
  --amber:#f2b441; --amber-dim:#9a6408;
  --sand:#f5f2ea; --paper:#ffffff; --ink:#15262e;
  --green:#236b43; --green-bg:#e9f6ee; --red:#a8322a; --red-bg:#fbeceb;
  --line:#dcd6c8; --muted-text:#4f5b5c; --focus:#b45309;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--sand);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;overflow-x:clip;overflow-y:visible}
a{color:var(--petrol-3);text-underline-offset:3px}
button{font:inherit}
:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
.skip{position:absolute;left:-9999px}.skip:focus{left:8px;top:8px;z-index:10;background:#fff;padding:10px}
header.top{background:var(--petrol);color:#fff;position:sticky;top:0;z-index:5;border-bottom:4px solid var(--amber)}
header.top .in{max-width:880px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
header.top .marca{font-weight:800;letter-spacing:.02em;color:#fff;text-decoration:none;margin-right:auto}
header.top nav{display:flex;gap:2px;overflow-x:auto;max-width:100%}
header.top nav a{color:#fff;text-decoration:none;padding:8px 9px;border-radius:8px;display:inline-block;min-height:44px;line-height:28px;white-space:nowrap}
header.top nav a[aria-current="page"],header.top nav a:hover{background:var(--petrol-3)}
.badge{display:inline-block;background:var(--amber);color:var(--petrol);border-radius:999px;padding:0 8px;font-size:13px;font-weight:700;margin-left:4px}
main{max-width:880px;margin:0 auto;padding:18px 16px 60px}
main:focus{outline:none}
h1{font-size:clamp(24px,5vw,32px);line-height:1.2;margin:8px 0 12px;color:var(--petrol)}
h2{font-size:21px;color:var(--petrol);margin:26px 0 10px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:16px;margin:12px 0}
.muted{color:var(--muted-text)}
.small{font-size:14px}
.grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.grid>.card{margin:0}
.btn{display:inline-block;background:var(--petrol);color:#fff;border:0;border-radius:10px;padding:11px 16px;min-height:44px;cursor:pointer;text-decoration:none;font-weight:600}
.btn.sec{background:#fff;color:var(--petrol);border:1.5px solid var(--petrol)}
.btn.block{display:block;width:100%;text-align:center}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.estado{font-size:13px;font-weight:700;border-radius:999px;padding:2px 10px;display:inline-block}
.estado.nueva{background:#eceae3;color:var(--muted-text)}
.estado.leida{background:#e6eef1;color:var(--petrol-2)}
.estado.en_practica{background:#fdf1d8;color:#6b4705}
.estado.dominada{background:var(--green-bg);color:var(--green)}
.bar{height:8px;background:#e6e1d4;border-radius:99px;overflow:hidden}.bar>i{display:block;height:100%;background:var(--petrol-3)}
.aviso{background:#fff7e3;border-left:4px solid var(--amber-dim);border-radius:6px;padding:10px 12px;margin:10px 0}
.error-msg{background:var(--red-bg);color:var(--red);border-radius:8px;padding:10px 12px}

/* Bloques pedagógicos (estructura de Magisterio; nunca h3 dentro del resumen oscuro) */
.lesson p{font-size:16px;line-height:1.7;margin:0 0 12px}
.lesson h3{font-size:17px;color:var(--petrol);margin:22px 0 8px}
.lesson h3:first-child{margin-top:0}
.exec-summary{background:linear-gradient(135deg,var(--petrol),var(--petrol-2));color:#fff;border-radius:10px;padding:14px 16px;margin-bottom:6px;font-size:15.5px;line-height:1.65}
.exec-summary b{color:var(--amber)}
.exec-summary p{margin:6px 0 0}
.case-box{background:#eaf2f4;border-left:4px solid var(--petrol);border-radius:6px;padding:11px 13px;margin:10px 0;font-size:15px;line-height:1.6}
.case-box b{color:var(--petrol)}
.analogy-box{background:#f3f0e6;border-left:4px solid var(--amber-dim);border-radius:6px;padding:11px 13px;margin:10px 0;font-size:15px;line-height:1.6;color:#443f31}
.worked{background:#f7f5ef;border:1px solid var(--line);border-radius:8px;padding:12px 14px;margin:10px 0}
.check-details{margin:12px 0;border:1.5px dashed var(--line);border-radius:8px;padding:10px 13px;font-size:15px;background:#fff}
.check-details summary{cursor:pointer;font-weight:600;color:var(--petrol);list-style:revert;min-height:22px;background:#fdf6e6;padding:8px 10px;border-radius:6px;margin:-2px}
.check-details summary:hover{background:#fbedcc}
.check-details[open] summary{margin-bottom:4px}
.check-details summary::marker{color:var(--amber-dim)}
.check-details .answer{margin-top:8px;padding-top:8px;border-top:1px solid var(--line);color:var(--muted-text)}
.tap-icon{display:inline-block;animation:tap-bounce 1.6s ease-in-out infinite}
@keyframes tap-bounce{0%,60%,100%{transform:translateY(0)}30%{transform:translateY(-3px)}}
.check-details[open] .tap-icon{animation:none}
@media (prefers-reduced-motion:reduce){.tap-icon{animation:none}}
table{border-collapse:collapse;width:100%;font-size:14px;margin:10px 0;display:block;overflow-x:auto}
th,td{border:1px solid var(--line);padding:6px 8px;text-align:left;vertical-align:top}
caption{text-align:left;font-weight:700;margin-bottom:6px}

/* Ejercicios */
.ej{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:16px 0}
.ej .etapa{font-size:12px;letter-spacing:.08em;text-transform:uppercase;font-weight:800;color:var(--petrol-3)}
.q-text{font-size:16.5px;font-weight:600;margin:6px 0 10px;color:var(--ink);line-height:1.5}
.opt{display:block;width:100%;text-align:left;background:#fff;border:1.5px solid var(--line);border-radius:10px;padding:13px;margin-bottom:8px;font-size:15px;cursor:pointer;font-family:inherit;color:var(--ink);min-height:44px}
.opt:hover{border-color:var(--petrol-3)}
.opt[aria-pressed="true"]{border-color:var(--petrol);background:#eef4f6;font-weight:600}
.opt .l{font-weight:800;margin-right:6px;color:var(--petrol)}
.opt.correct{border-color:var(--green);background:var(--green-bg);color:#17502f;font-weight:600}
.opt.wrong{border-color:var(--red);background:var(--red-bg);color:#7e231c;font-weight:600}
.opt[disabled]{cursor:default}
.conf{margin:10px 0}
.conf legend{font-weight:600;font-size:15px;margin-bottom:6px}
.conf fieldset{border:0;padding:0;margin:0}
.chip{border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;min-height:44px;cursor:pointer;margin:0 6px 6px 0}
.chip[aria-pressed="true"]{border-color:var(--petrol);background:var(--petrol);color:#fff}
.explain{font-size:14.5px;background:#f3f0e6;border-radius:8px;padding:10px 12px;margin-top:6px;color:#393528;line-height:1.6}
.explain b{color:var(--petrol)}
.explain.ok{background:var(--green-bg)}
.explain.no{background:var(--red-bg)}
textarea{width:100%;min-height:120px;border:1.5px solid var(--line);border-radius:10px;padding:10px;font:inherit}
.crit label{display:flex;gap:10px;align-items:flex-start;padding:8px 0;border-bottom:1px solid #eee;cursor:pointer}
.crit input{width:22px;height:22px;margin-top:2px;flex:none}
.bloqueo{background:#eef2f3;border-radius:8px;padding:10px 12px;color:var(--petrol-2)}
.timer{position:sticky;top:64px;background:var(--amber);color:var(--petrol);font-weight:800;border-radius:10px;padding:8px 12px;display:inline-block;z-index:4}
.fuentes li{margin-bottom:6px;font-size:14px}
footer.pie{max-width:880px;margin:0 auto;padding:0 16px 30px;font-size:13px;color:var(--muted-text)}
@media (max-width:420px){main{padding:14px 12px 50px}.ej,.card{padding:12px}header.top .in{padding:6px 10px;gap:4px}header.top nav a{padding:8px 7px;font-size:15px}}