/* TesisStat — estilos de la página de preventa */
[hidden] { display: none !important; }
:root {
  --azul: #0f304d;
  --azul-osc: #0a2236;
  --azul-claro: #e8eef4;
  --verde: #876740;
  --verde-claro: #f8efe1;
  --acento: #daaa6d;
  --acento-osc: #c9934f;
  --acero: #2b5a7d;
  --texto: #14243a;
  --texto-suave: #4f5b70;
  --borde: #dbe1ec;
  --fondo: #ffffff;
  --fondo-alt: #f5f7fb;
  --radio: 14px;
  --sombra: 0 10px 30px rgba(15, 48, 77, .12);
  --ancho: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--texto);
  background: var(--fondo);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--azul); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .6em; letter-spacing: -.01em; }
h1 { font-size: clamp(1.9rem, 4.6vw, 3.1rem); }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.2rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }

.contenedor { width: 100%; max-width: var(--ancho); margin: 0 auto; padding: 0 16px; }
.seccion { padding: 72px 0; }
.seccion.alt { background: var(--fondo-alt); }
.centro { text-align: center; }
.subtitulo-seccion { color: var(--texto-suave); max-width: 680px; margin: 0 auto 40px; }
.etiqueta {
  display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--verde); background: var(--verde-claro);
  padding: 4px 12px; border-radius: 999px; margin-bottom: 14px;
}

/* Barra superior */
.barra { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.94);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--borde); }
.barra .contenedor { display: flex; align-items: center; justify-content: space-between; height: 62px; gap: 12px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.2rem;
  color: var(--azul-osc); text-decoration: none; }
.logo-marca { width: 32px; height: 32px; border-radius: 9px; background: var(--azul);
  display: grid; place-items: center; }
.logo small { font-weight: 600; color: var(--texto-suave); font-size: .75rem; display: block; line-height: 1; }
.nav { display: flex; gap: 22px; align-items: center; }
.nav a { color: var(--texto-suave); text-decoration: none; font-size: .95rem; }
.nav a:hover { color: var(--azul); }
@media (max-width: 760px) { .nav a:not(.boton) { display: none; } }

/* Botones */
.boton {
  display: inline-block; background: var(--acento); color: #0f304d; font-weight: 700;
  text-decoration: none; padding: 15px 26px; border-radius: 12px; border: 0; cursor: pointer;
  font-size: 1.02rem; box-shadow: 0 6px 18px rgba(218,170,109,.40); transition: transform .15s, box-shadow .15s;
  text-align: center;
}
.boton:hover { transform: translateY(-1px); box-shadow: 0 10px 24px rgba(218,170,109,.55); }
.boton.secundario { background: #fff; color: var(--azul); border: 2px solid var(--azul); box-shadow: none; }
.boton.pequeno { padding: 9px 16px; font-size: .9rem; box-shadow: none; }
.boton.bloque { display: block; width: 100%; }

/* Hero */
.hero { padding: 64px 0 72px; background:
  radial-gradient(1000px 420px at 85% -10%, var(--azul-claro), transparent 70%),
  radial-gradient(700px 360px at -10% 110%, var(--verde-claro), transparent 70%); }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.hero p.lead { font-size: 1.15rem; color: var(--texto-suave); max-width: 560px; }
.hero .nota { font-size: .9rem; color: var(--texto-suave); margin-top: 12px; }
.hero .insignias { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 26px; font-size: .9rem; color: var(--texto-suave); }
.hero .insignias span::before { content: "✓ "; color: var(--verde); font-weight: 800; }
.precio-lanzamiento { display: inline-block; background: #f8efe1; color: #6e5232; font-weight: 700;
  font-size: .85rem; padding: 4px 12px; border-radius: 999px; margin-bottom: 16px; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; gap: 36px; } }

/* Tarjeta de demo en hero */
.panel { background: #fff; border: 1px solid var(--borde); border-radius: var(--radio); box-shadow: var(--sombra); overflow: hidden; }
.panel-cab { display: flex; gap: 6px; padding: 10px 14px; background: var(--fondo-alt); border-bottom: 1px solid var(--borde); align-items: center; }
.panel-cab i { width: 10px; height: 10px; border-radius: 50%; background: #d4dae6; display: block; }
.panel-cab b { margin-left: 8px; font-size: .8rem; color: var(--texto-suave); font-weight: 600; }
.panel-cuerpo { padding: 18px; }
.paso-demo { display: flex; gap: 12px; align-items: flex-start; padding: 10px 0; border-bottom: 1px dashed var(--borde); font-size: .93rem; }
.paso-demo:last-child { border-bottom: 0; }
.paso-demo .ico { flex: 0 0 30px; height: 30px; border-radius: 8px; display: grid; place-items: center;
  background: var(--azul-claro); color: var(--azul); font-weight: 800; font-size: .85rem; }
.paso-demo.ok .ico { background: var(--verde-claro); color: var(--verde); }
.paso-demo small { display: block; color: var(--texto-suave); }
.chip { display: inline-block; font-size: .75rem; padding: 2px 8px; border-radius: 6px; background: var(--azul-claro); color: var(--azul); margin: 4px 4px 0 0; font-weight: 600; }

/* Problema */
.problemas { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.problema { background: #fff; border: 1px solid var(--borde); border-radius: var(--radio); padding: 26px; }
.problema .emoji { font-size: 1.8rem; margin-bottom: 10px; }
.problema p { color: var(--texto-suave); margin: 0; font-size: .95rem; }
@media (max-width: 820px) { .problemas { grid-template-columns: 1fr; } }

/* Pasos */
.pasos { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; counter-reset: paso; }
.paso { position: relative; background: #fff; border-radius: var(--radio); padding: 28px 24px 24px; border: 1px solid var(--borde); }
.paso::before { counter-increment: paso; content: counter(paso); position: absolute; top: -18px; left: 24px;
  width: 38px; height: 38px; border-radius: 50%; background: var(--azul); color: #fff; font-weight: 800;
  display: grid; place-items: center; }
.paso p { color: var(--texto-suave); margin: 0; font-size: .95rem; }
@media (max-width: 820px) { .pasos { grid-template-columns: 1fr; gap: 34px; } }

/* Incluye */
.incluye { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.item { display: flex; gap: 14px; background: #fff; border: 1px solid var(--borde); border-radius: var(--radio); padding: 20px; }
.item .ico { flex: 0 0 42px; height: 42px; border-radius: 10px; background: var(--azul-claro); display: grid; place-items: center; font-size: 1.3rem; }
.item p { margin: 0; color: var(--texto-suave); font-size: .93rem; }
.item h3 { margin-bottom: 4px; }

/* Muestras */
.muestras { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.muestra { min-width: 0; }
.muestra h3 { font-size: 1rem; margin-bottom: 10px; color: var(--texto-suave); font-weight: 600; }
@media (max-width: 860px) { .muestras { grid-template-columns: 1fr; } }
.apa { font-family: "Times New Roman", Times, serif; font-size: .95rem; padding: 22px; }
.apa .num { font-weight: 700; }
.apa .tit { font-style: italic; margin-bottom: 8px; }
.apa table { width: 100%; border-collapse: collapse; }
.apa th, .apa td { padding: 5px 6px; text-align: center; }
.apa th:first-child, .apa td:first-child { text-align: left; }
.apa thead th { border-top: 1.5px solid #000; border-bottom: 1px solid #000; font-weight: 400; }
.apa tbody tr:last-child td { border-bottom: 1.5px solid #000; }
.apa .nota-apa { font-size: .85rem; margin-top: 8px; }
.tabla-scroll { overflow-x: auto; }
.excel { font-family: Calibri, Arial, sans-serif; font-size: .82rem; }
.excel table { border-collapse: collapse; width: 100%; min-width: 420px; }
.excel td, .excel th { border: 1px solid #d6d6d6; padding: 4px 8px; white-space: nowrap; }
.excel th { background: #f2f2f2; color: #555; font-weight: 400; }
.excel .cab td { background: #1d6f42; color: #fff; font-weight: 700; }
.excel .pestanas { display: flex; gap: 2px; background: #f2f2f2; padding: 6px 6px 0; overflow-x: auto; }
.excel .pestanas span { padding: 5px 12px; background: #e3e3e3; border-radius: 4px 4px 0 0; white-space: nowrap; color: #444; }
.excel .pestanas span.activa { background: #fff; color: #1d6f42; font-weight: 700; border-bottom: 2px solid #1d6f42; }
.spss { font-family: Arial, sans-serif; font-size: .8rem; }
.spss table { border-collapse: collapse; width: 100%; min-width: 460px; }
.spss th { background: #e9eef7; font-weight: 600; color: #333; }
.spss td, .spss th { border: 1px solid #c9d2e3; padding: 4px 8px; white-space: nowrap; text-align: left; }
.spss .barra-spss { background: #c51f2b; color: #fff; padding: 6px 12px; font-weight: 700; font-size: .8rem; }
.resumen-simple { background: var(--verde-claro); border: 1px solid #ead7b8; border-radius: var(--radio); padding: 22px 24px; margin-top: 22px; }
.resumen-simple h3 { color: var(--verde); }
.resumen-simple ul { margin: 0; padding-left: 20px; }
.resumen-simple li { margin-bottom: 6px; }

/* Confianza */
.confianza { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.confianza .item { flex-direction: column; }
@media (max-width: 860px) { .confianza { grid-template-columns: 1fr; } }

/* Precios */
.precios { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; align-items: stretch; }
.plan { background: #fff; border: 1px solid var(--borde); border-radius: var(--radio); padding: 24px 20px; display: flex; flex-direction: column; position: relative; }
.plan.destacado { border: 2px solid var(--azul); box-shadow: var(--sombra); }
.plan .cinta { position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--azul); color: #fff;
  font-size: .75rem; font-weight: 700; padding: 3px 12px; border-radius: 999px; white-space: nowrap; }
.plan h3 { margin-bottom: 4px; }
.plan .para { color: var(--texto-suave); font-size: .88rem; min-height: 3.2em; }
.plan .precio { font-size: 2rem; font-weight: 800; color: var(--azul-osc); line-height: 1.1; margin: 10px 0 2px; }
.plan .precio small { font-size: .9rem; font-weight: 600; color: var(--texto-suave); }
.plan .antes { font-size: .85rem; color: var(--texto-suave); min-height: 1.4em; }
.plan .antes s { color: #9aa3b5; }
.plan ul { list-style: none; padding: 0; margin: 14px 0 20px; font-size: .9rem; flex: 1; }
.plan li { padding: 4px 0 4px 22px; position: relative; }
.plan li::before { content: "✓"; position: absolute; left: 0; color: var(--verde); font-weight: 800; }
.plan .boton { font-size: .92rem; padding: 12px 14px; }
.aviso-precios { text-align: center; color: var(--texto-suave); font-size: .9rem; margin-top: 24px; }
@media (max-width: 1080px) { .precios { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 720px) { .precios { grid-template-columns: 1fr; } .plan .para { min-height: 0; } }

/* FAQ */
.faq { max-width: 780px; margin: 0 auto; }
.faq details { background: #fff; border: 1px solid var(--borde); border-radius: 12px; margin-bottom: 12px; padding: 0 20px; }
.faq summary { cursor: pointer; font-weight: 700; padding: 18px 0; list-style: none; position: relative; padding-right: 28px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 14px; font-size: 1.4rem; color: var(--azul); }
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--texto-suave); margin-bottom: 18px; }

/* Cierre */
.cierre { background: linear-gradient(135deg, var(--azul-osc), var(--acero)); color: #fff; }
.cierre h2 { color: #fff; }
.cierre p { color: #dbe5ef; }
.lista-espera { display: flex; gap: 10px; max-width: 520px; margin: 26px auto 0; flex-wrap: wrap; }
.lista-espera input[type=email] { flex: 1 1 240px; padding: 14px 16px; border-radius: 12px; border: 0; font-size: 1rem; min-width: 0; }
.lista-espera button { flex: 0 0 auto; }
.lista-espera .boton.secundario { background: transparent; color: #fff; border-color: #fff; }
.consentimiento { font-size: .8rem; color: #b7c7d8; margin-top: 10px; }
.consentimiento a { color: #fff; }
.mensaje-form { margin-top: 12px; font-weight: 600; min-height: 1.4em; }
@media (max-width: 520px) { .lista-espera button { width: 100%; } }

/* Pie */
.pie { background: #0a2236; color: #9fb0d6; font-size: .88rem; padding: 34px 0; }
.pie .contenedor { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.pie a { color: #dbe5ef; text-decoration: none; margin-right: 16px; }

/* Barra fija en móvil */
.cta-movil { display: none; }
@media (max-width: 720px) {
  .cta-movil { display: block; position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; padding: 10px 16px;
    background: rgba(255,255,255,.96); border-top: 1px solid var(--borde); }
  body { padding-bottom: 76px; }
}

/* Páginas legales */
.legal { max-width: 780px; margin: 0 auto; padding: 48px 16px 72px; }
.legal h2 { font-size: 1.3rem; margin-top: 2em; }
.legal li { margin-bottom: 6px; }

/* Marca Research Assessor */
.logo-ra { height: 34px; width: auto; }
.marca-par { display: flex; align-items: center; gap: 14px; }
.marca-par .sep { width: 1px; height: 30px; background: var(--borde); }
@media (max-width: 520px) { .marca-par .sep, .marca-par .logo-ra { display: none; } }
.pie .logo-chip { background: #fff; border-radius: 8px; padding: 4px 8px; display: inline-block; vertical-align: middle; margin-right: 10px; }
.pie .logo-chip img { height: 28px; width: auto; display: block; }
.respaldo { display: flex; align-items: center; gap: 12px; margin-top: 10px; }
.respaldo img { height: 38px; width: auto; }

/* Logo TesisStat */
.logo { gap: 10px; }
.logo-icono { height: 40px; width: auto; display: block; }
.logo-texto { font-family: "Comfortaa", "Inter", -apple-system, sans-serif; font-weight: 700; font-size: 1.45rem; line-height: 1; letter-spacing: 0; display: block; }
.logo-texto .lt { color: var(--azul); } .logo-texto .ls { color: #c9934f; }
.logo-texto small { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif; font-weight: 600; font-size: .72rem; color: var(--texto-suave); display: block; margin-top: 4px; letter-spacing: .01em; }