/* Página de presentación de Gestiona tu Investigación — misma paleta que la plataforma */
:root{
  --navy:#1E3A5F; --navy-dk:#152A45; --navy-dker:#0F1E33;
  --gold:#8A5E12; --gold-cta:#E9B949; --gold-lt:#F5EBD6;
  --green:#2A7466; --green-lt:#E1F0EC; --red:#B4543A; --red-lt:#F8E6E0;
  --bg:#F6F4EF; --card:#FFFFFF; --border:#E3DFD6; --text:#1B2B45; --muted:#5F6B7A;
  --sombra:0 1px 2px rgba(15,30,51,.06), 0 8px 24px rgba(15,30,51,.07);
  --radio:16px; --ancho:1120px;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root{
    --navy:#9CC0EA; --navy-dk:#0E1A2B; --navy-dker:#09121F;
    --gold:#E9C46A; --gold-lt:#2B2414; --green:#7CC7B6; --green-lt:#12261F; --red:#E39A85; --red-lt:#2B1813;
    --bg:#0F1724; --card:#16202F; --border:#263449; --text:#E6ECF3; --muted:#A3B0C2;
    --sombra:0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
    color-scheme:dark;
  }
}
*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; scroll-padding-top:76px; }
body{ margin:0; background:var(--bg); color:var(--text); font-family:"Atkinson Hyperlegible",-apple-system,"Segoe UI",system-ui,sans-serif; font-size:17px; line-height:1.6; -webkit-font-smoothing:antialiased; }
h1,h2,h3{ font-family:Fraunces,Georgia,"Times New Roman",serif; font-weight:600; line-height:1.15; color:var(--navy); margin:0 0 .5em; letter-spacing:-.01em; }
h1{ font-size:clamp(34px,5.4vw,58px); } h2{ font-size:clamp(28px,3.6vw,40px); } h3{ font-size:20px; }
p{ margin:0 0 1em; } a{ color:var(--navy); } a[href^="mailto"]{ overflow-wrap:anywhere; }
img{ max-width:100%; height:auto; }
.envoltura{ max-width:var(--ancho); margin:0 auto; padding:0 20px; }
.saltar{ position:absolute; left:-9999px; } .saltar:focus{ left:16px; top:12px; z-index:100; background:var(--card); padding:8px 12px; border-radius:8px; }
:focus-visible{ outline:3px solid var(--gold-cta); outline-offset:2px; border-radius:6px; }

/* encabezado */
.encabezado{ position:sticky; top:0; z-index:50; background:color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter:saturate(1.4) blur(10px); border-bottom:1px solid var(--border); }
.encabezado .envoltura{ display:flex; align-items:center; gap:18px; height:64px; }
.marca{ display:flex; align-items:center; gap:10px; text-decoration:none; color:var(--navy); font-family:Fraunces,Georgia,serif; font-weight:600; font-size:18px; white-space:nowrap; }
.marca img{ width:34px; height:34px; border-radius:9px; }
.navegacion{ display:flex; gap:20px; margin-left:auto; } .navegacion a{ text-decoration:none; color:var(--muted); font-size:15px; } .navegacion a:hover{ color:var(--navy); }
.boton{ display:inline-flex; align-items:center; justify-content:center; gap:8px; padding:12px 22px; border-radius:999px; font-weight:700; font-size:16px; text-decoration:none; border:1.5px solid transparent; cursor:pointer; transition:transform .15s ease, box-shadow .15s ease; }
.boton:hover{ transform:translateY(-1px); }
.boton.principal{ background:var(--gold-cta); color:#1B2B45; box-shadow:0 6px 18px rgba(233,185,73,.35); }
.boton.secundario{ border-color:var(--navy); color:var(--navy); background:transparent; }
.boton.chico{ padding:8px 16px; font-size:14.5px; }
@media (max-width:860px){ .navegacion{ display:none; } .encabezado .boton.chico{ margin-left:auto; } }
@media (max-width:440px){ .encabezado .envoltura{ gap:10px; padding:0 16px; } .marca{ font-size:15.5px; gap:8px; } .marca img{ width:30px; height:30px; } .envoltura{ padding:0 16px; } }

/* portada */
.portada{ padding:64px 0 40px; overflow:hidden; }
.portada .envoltura{ display:grid; grid-template-columns:1.05fr .95fr; gap:48px; align-items:center; }
.antetitulo{ display:inline-block; font-size:13px; letter-spacing:.12em; text-transform:uppercase; font-weight:700; color:var(--gold); margin-bottom:14px; }
.portada .bajada{ font-size:clamp(17px,1.6vw,20px); color:var(--muted); max-width:560px; }
.acciones{ display:flex; gap:12px; flex-wrap:wrap; margin:26px 0 14px; }
.letra-chica{ font-size:14px; color:var(--muted); }
@media (max-width:900px){ .portada .envoltura{ grid-template-columns:1fr; } .portada{ padding-top:36px; } }

/* maqueta de la plataforma (hecha con HTML, no es una captura) */
.maqueta{ background:var(--card); border:1px solid var(--border); border-radius:20px; box-shadow:var(--sombra); overflow:hidden; transform:rotate(-1deg); }
.maqueta-barra{ display:flex; gap:6px; padding:10px 14px; border-bottom:1px solid var(--border); background:color-mix(in srgb, var(--navy) 6%, var(--card)); }
.maqueta-barra i{ width:10px; height:10px; border-radius:50%; background:var(--border); display:block; }
.maqueta-cuerpo{ display:grid; grid-template-columns:150px 1fr; min-height:300px; }
.maqueta-lado{ border-right:1px solid var(--border); padding:14px 10px; font-size:12.5px; }
.maqueta-lado div{ padding:6px 8px; border-radius:8px; margin-bottom:4px; color:var(--muted); display:flex; gap:6px; align-items:center; }
.maqueta-lado .hecho::before{ content:"✓"; color:var(--green); font-weight:700; }
.maqueta-lado .actual{ background:var(--gold-lt); color:var(--text); font-weight:700; }
.maqueta-lado .actual::before{ content:"●"; color:var(--gold-cta); }
.maqueta-lado .pendiente::before{ content:"○"; }
.maqueta-principal{ padding:16px 18px; }
.maqueta-principal .paso{ font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--gold); font-weight:700; }
.maqueta-principal h4{ font-family:Fraunces,Georgia,serif; color:var(--navy); margin:4px 0 10px; font-size:18px; }
.maqueta-campo{ border:1px solid var(--border); border-radius:10px; padding:10px; font-size:12.5px; color:var(--muted); margin-bottom:8px; position:relative; }
.maqueta-campo .linea{ height:7px; border-radius:4px; background:var(--border); margin:6px 0; }
.maqueta-campo .contador{ position:absolute; right:8px; bottom:4px; font-size:10.5px; color:var(--green); }
.maqueta-tutor{ background:var(--green-lt); border-radius:10px; padding:10px; font-size:12px; color:var(--text); }
.maqueta-tutor b{ color:var(--green); }
.maqueta-avance{ height:8px; border-radius:6px; background:var(--border); margin-top:12px; overflow:hidden; } .maqueta-avance span{ display:block; height:100%; width:62%; background:var(--green); }
@media (max-width:520px){ .maqueta-cuerpo{ grid-template-columns:1fr; } .maqueta-lado{ display:none; } .maqueta{ transform:none; } }

/* franja de origen */
.origen{ border-top:1px solid var(--border); border-bottom:1px solid var(--border); background:var(--card); }
.origen .envoltura{ display:flex; gap:28px; flex-wrap:wrap; justify-content:space-between; padding-top:22px; padding-bottom:22px; }
.dato{ display:flex; flex-direction:column; } .dato b{ font-family:Fraunces,Georgia,serif; font-size:28px; color:var(--navy); line-height:1.1; } .dato span{ font-size:14px; color:var(--muted); }

/* secciones */
.seccion{ padding:80px 0; }
.seccion.alterna{ background:var(--card); border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.encabeza{ max-width:720px; margin-bottom:40px; } .encabeza p{ color:var(--muted); font-size:18px; }
.rejilla{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
@media (max-width:960px){ .rejilla{ grid-template-columns:repeat(2,1fr); } } @media (max-width:600px){ .rejilla{ grid-template-columns:1fr; } .seccion{ padding:56px 0; } }
.virtud{ background:var(--card); border:1px solid var(--border); border-radius:var(--radio); padding:24px; }
.seccion.alterna .virtud{ background:var(--bg); }
.virtud .icono{ width:44px; height:44px; border-radius:12px; display:grid; place-items:center; font-size:22px; background:var(--gold-lt); margin-bottom:14px; }
.virtud h3{ font-size:19px; } .virtud p{ font-size:15.5px; color:var(--muted); margin:0; }
.virtud.destacada{ grid-column:span 2; background:var(--navy-dk); border-color:var(--navy-dk); }
.virtud.destacada h3{ color:#F1F4F8; } .virtud.destacada p{ color:#C3CCD8; } .virtud.destacada .icono{ background:rgba(233,185,73,.18); }
@media (max-width:600px){ .virtud.destacada{ grid-column:auto; } }

/* cómo funciona */
.pasos{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; counter-reset:paso; }
@media (max-width:900px){ .pasos{ grid-template-columns:repeat(2,1fr); } } @media (max-width:560px){ .pasos{ grid-template-columns:1fr; } }
.paso-item{ position:relative; padding-top:52px; }
.paso-item::before{ counter-increment:paso; content:counter(paso); position:absolute; top:0; left:0; width:40px; height:40px; border-radius:50%; background:var(--navy); color:var(--bg); display:grid; place-items:center; font-weight:700; font-family:Fraunces,Georgia,serif; font-size:18px; }
.paso-item p{ color:var(--muted); font-size:15.5px; }

/* notas de metodología */
.notas{ display:grid; grid-template-columns:repeat(2,1fr); gap:20px; }
@media (max-width:760px){ .notas{ grid-template-columns:1fr; } }
.nota{ background:var(--card); border:1px solid var(--border); border-left:4px solid var(--gold-cta); border-radius:12px; padding:22px 24px; }
.seccion.alterna .nota{ background:var(--bg); }
.nota h3{ font-size:19px; } .nota p{ font-size:15.5px; margin-bottom:.6em; }
.nota .fuente{ font-size:13.5px; color:var(--muted); font-style:italic; margin:0; }
.referencias{ margin-top:36px; font-size:14.5px; color:var(--muted); }
.referencias p{ padding-left:2em; text-indent:-2em; margin-bottom:.5em; }
.aclaracion{ font-size:14px; color:var(--muted); margin-top:18px; }

/* precio */
.precio-env{ display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); gap:28px; align-items:stretch; }
@media (max-width:860px){ .precio-env{ grid-template-columns:minmax(0,1fr); } }
.tarjeta-precio{ background:var(--card); border:2px solid var(--gold-cta); border-radius:20px; padding:32px; box-shadow:var(--sombra); }
.tarjeta-precio .monto{ font-family:Fraunces,Georgia,serif; font-size:56px; color:var(--navy); line-height:1; }
.tarjeta-precio .monto small{ font-size:18px; font-family:"Atkinson Hyperlegible",sans-serif; color:var(--muted); }
.lista-check{ list-style:none; padding:0; margin:20px 0 24px; } .lista-check li{ padding-left:28px; position:relative; margin-bottom:8px; font-size:15.5px; }
.lista-check li::before{ content:"✓"; position:absolute; left:0; color:var(--green); font-weight:700; }
.tarjeta-docente{ background:var(--navy-dk); color:#E6ECF3; border-radius:20px; padding:32px; }
.tarjeta-docente h3{ color:#F1F4F8; } .tarjeta-docente p{ color:#C3CCD8; } .tarjeta-docente a{ color:var(--gold-cta); }
.tarjeta-docente .boton.secundario{ border-color:#C3CCD8; color:#F1F4F8; }

/* preguntas frecuentes */
.preguntas{ max-width:820px; }
.preguntas details{ background:var(--card); border:1px solid var(--border); border-radius:12px; margin-bottom:10px; }
.seccion.alterna .preguntas details{ background:var(--bg); }
.preguntas summary{ cursor:pointer; padding:18px 52px 18px 20px; font-weight:700; color:var(--navy); list-style:none; position:relative; }
.preguntas summary::-webkit-details-marker{ display:none; }
.preguntas summary::after{ content:"+"; position:absolute; right:20px; top:50%; transform:translateY(-50%); font-size:24px; font-weight:400; color:var(--gold); }
.preguntas details[open] summary::after{ content:"–"; }
.preguntas details > div{ padding:0 20px 18px; color:var(--text); font-size:16px; } .preguntas details > div p:last-child{ margin:0; }

/* cierre y pie */
.cierre{ text-align:center; padding:80px 0; background:linear-gradient(160deg,var(--navy-dk),var(--navy-dker)); color:#E6ECF3; }
.cierre h2{ color:#F1F4F8; } .cierre p{ color:#C3CCD8; max-width:620px; margin:0 auto 26px; font-size:18px; }
.pie{ padding:40px 0; font-size:14.5px; color:var(--muted); }
.pie .envoltura{ display:grid; grid-template-columns:2fr 1fr 1fr; gap:28px; }
@media (max-width:760px){ .pie .envoltura{ grid-template-columns:1fr; } }
.pie h4{ margin:0 0 8px; color:var(--text); font-size:15px; } .pie a{ color:var(--muted); display:block; margin-bottom:6px; } .pie a:hover{ color:var(--navy); }

/* páginas legales */
.legal{ max-width:820px; padding:48px 20px 72px; margin:0 auto; }
.legal h1{ font-size:clamp(30px,4vw,42px); } .legal h2{ font-size:22px; margin-top:1.8em; }
.legal .actualizado{ color:var(--muted); font-size:14.5px; }
.legal li{ margin-bottom:.4em; }

@media (prefers-reduced-motion: reduce){ html{ scroll-behavior:auto; } .boton, .maqueta{ transition:none; transform:none; } }