/* ============================================================
   smartxcl — sistema visual compartido
   Paleta clara (blanco/gris + verde Excel como acento), tipografía
   editorial sobria, esquinas rectas. Referencia: PwC, McKinsey.
   ============================================================ */

:root {
  --verde: #217346;
  --verde-vivo: #2f9159;
  --verde-oscuro: #16512f;
  --verde-claro: #eaf6ef;
  --negro: #14181d;
  --gris-700: #4b5563;
  --gris-400: #9aa4b2;
  --gris-200: #e2e6ea;
  --gris-100: #f6f7f9;
  --blanco: #ffffff;

  --fuente-titulo: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --fuente-texto: 'Public Sans', -apple-system, Segoe UI, Roboto, Arial, sans-serif;

  --max-ancho: 1180px;
}

* { box-sizing: border-box; border-radius: 0 !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--fuente-texto);
  color: var(--negro);
  background: var(--blanco);
  line-height: 1.6;
}

img { max-width: 100%; display: block; }

a { color: inherit; }

.contenedor {
  max-width: var(--max-ancho);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  font-family: var(--fuente-titulo);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 .5em;
  color: var(--negro);
}

h1 { font-size: clamp(2.2rem, 4vw, 3.4rem); }
h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1em; color: var(--gris-700); }

.eyebrow {
  display: inline-block;
  font-family: var(--fuente-texto);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--verde);
  margin-bottom: 14px;
}

/* ---------- Botones ---------- */
.boton {
  display: inline-block;
  padding: 14px 28px;
  font-weight: 600;
  font-size: .95rem;
  text-decoration: none;
  transition: all .15s ease;
  border: 1px solid transparent;
}
.boton-primario {
  background: var(--verde);
  color: var(--blanco);
}
.boton-primario:hover { background: var(--verde-oscuro); }
.boton-claro {
  background: var(--blanco);
  color: var(--verde-oscuro);
}
.boton-claro:hover { background: var(--verde-claro); }
.boton-secundario {
  background: transparent;
  color: inherit;
  border-color: currentColor;
}
.boton-secundario:hover { background: rgba(255,255,255,.12); }
.boton-oscuro {
  background: var(--negro);
  color: var(--blanco);
}
.boton-oscuro:hover { background: #000; }

/* ---------- Header ---------- */
.encabezado {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--blanco);
  border-bottom: 1px solid var(--gris-200);
}
.encabezado .contenedor {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.logo {
  font-family: var(--fuente-titulo);
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--negro);
  letter-spacing: -.01em;
}
.logo span { color: var(--verde); }

.nav-principal { display: flex; align-items: center; gap: 30px; }
.nav-principal a:not(.boton) {
  text-decoration: none;
  color: var(--gris-700);
  font-size: .95rem;
  font-weight: 500;
  padding-bottom: 5px;
  border-bottom: 2px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
.nav-principal a:not(.boton):hover { color: var(--verde); border-bottom-color: var(--verde); }
.nav-principal a.activo:not(.boton) { color: var(--verde); font-weight: 700; border-bottom-color: var(--verde); }
.nav-cta { margin-left: 8px; }

.nav-toggle { display: none; }

@media (max-width: 860px) {
  .nav-principal {
    position: fixed;
    inset: 76px 0 0 0;
    background: var(--blanco);
    flex-direction: column;
    align-items: flex-start;
    padding: 28px 24px;
    gap: 20px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: all .18s ease;
    border-top: 1px solid var(--gris-200);
  }
  .nav-principal.abierto { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-toggle {
    display: block;
    background: none;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
  }
}

/* ---------- Layout a dos columnas ---------- */
.dos-columnas {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 900px) {
  .dos-columnas { grid-template-columns: 1fr; }
}

.foto-placeholder {
  background: var(--gris-100);
  border: 1px solid var(--gris-200);
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
}
.foto-placeholder.vertical { aspect-ratio: 3 / 4; }
.foto-placeholder span {
  font-size: .78rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--gris-400);
}

/* ---------- Hero ---------- */
.hero {
  background: var(--blanco);
  padding: 96px 0 88px;
  border-bottom: 1px solid var(--gris-200);
}
.hero h1 { color: var(--negro); }
.hero .subrayado { color: var(--verde); }
.hero p.lead {
  color: var(--gris-700);
  font-size: 1.15rem;
  max-width: 560px;
}
.hero .acciones { display: flex; gap: 16px; margin-top: 32px; flex-wrap: wrap; }

.hero-nivel {
  background: var(--verde-claro);
  padding: 88px 0 76px;
  border-bottom: 1px solid var(--gris-200);
}
.hero-nivel h1 { color: var(--negro); }
.hero-nivel p.lead { color: var(--gris-700); max-width: 560px; font-size: 1.1rem; }

/* ---------- Barra de cifras ---------- */
.cifras {
  background: var(--verde);
  color: var(--blanco);
  padding: 40px 0;
}
.cifras .grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.cifras .num {
  font-family: var(--fuente-titulo);
  font-size: 2.1rem;
  font-weight: 700;
  display: block;
}
.cifras .etiqueta { font-size: .85rem; color: var(--verde-claro); }
@media (max-width: 700px) {
  .cifras .grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Secciones genéricas ---------- */
.seccion { padding: 96px 0; }
.seccion-alt { background: var(--gris-100); }
.seccion-encabezado { max-width: 680px; margin-bottom: 56px; }

/* ---------- Grid de servicios / niveles ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
}
.tarjeta {
  background: var(--blanco);
  border: 1px solid var(--gris-200);
  padding: 36px 30px;
  transition: box-shadow .15s ease, border-color .15s ease;
  text-decoration: none;
  display: block;
}
.tarjeta:hover { box-shadow: 0 12px 24px rgba(20,24,29,.06); border-color: var(--verde); }
.tarjeta .marca-nivel {
  width: 44px; height: 4px; background: var(--verde); margin-bottom: 20px;
}
.tarjeta h3 { margin-bottom: 10px; }
.tarjeta ul { padding-left: 18px; margin: 16px 0 0; color: var(--gris-700); font-size: .93rem; }
.tarjeta ul li { margin-bottom: 6px; }

/* ---------- Lista de temas (páginas de nivel) ---------- */
.lista-temas {
  display: grid;
  gap: 20px;
}
.tema {
  display: flex;
  gap: 18px;
  padding: 24px;
  background: var(--blanco);
  border: 1px solid var(--gris-200);
}
.tema .indice {
  font-family: var(--fuente-titulo);
  font-size: 1.4rem;
  color: var(--verde);
  font-weight: 700;
  flex-shrink: 0;
  width: 36px;
}

/* ---------- Blog ---------- */
.grid-blog {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
@media (max-width: 900px) { .grid-blog { grid-template-columns: 1fr; } }
.tarjeta-post { border: 1px solid var(--gris-200); overflow: hidden; text-decoration: none; display: block; background: var(--blanco); transition: border-color .15s ease; }
.tarjeta-post:hover { border-color: var(--verde); }
.tarjeta-post .cuerpo { padding: 22px; }
.tarjeta-post .cinta {
  height: 4px;
  background: var(--verde);
}
.tarjeta-post .categoria { font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--verde); }
.tarjeta-post h3 { margin: 10px 0; }
.tarjeta-post .meta { font-size: .82rem; color: var(--gris-400); }

.grid-videos {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
@media (max-width: 800px) { .grid-videos { grid-template-columns: 1fr; } }
.video-embed { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; background: var(--negro); border: 1px solid var(--gris-200); }
.video-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

article.post { max-width: 760px; margin: 0 auto; }
article.post .meta { color: var(--gris-400); font-size: .9rem; margin-bottom: 24px; }
article.post h2 { margin-top: 1.6em; }

/* ---------- Formulario de contacto ---------- */
.formulario { max-width: 620px; }
.campo { margin-bottom: 20px; }
.campo label { display: block; font-weight: 600; margin-bottom: 6px; font-size: .92rem; }
.campo input, .campo textarea, .campo select {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--gris-200);
  font-family: var(--fuente-texto);
  font-size: 1rem;
  background: var(--blanco);
}
.campo input:focus, .campo textarea:focus, .campo select:focus {
  outline: none;
  border-color: var(--verde);
}
.campo textarea { resize: vertical; min-height: 130px; }

/* ---------- CTA final ---------- */
.cta-final {
  background: var(--verde);
  color: var(--blanco);
  padding: 84px 0;
  text-align: center;
}
.cta-final h2 { color: var(--blanco); }
.cta-final p { color: var(--verde-claro); max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-final .acciones { display: flex; justify-content: center; gap: 16px; margin-top: 28px; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.pie {
  background: var(--gris-100);
  color: var(--gris-700);
  border-top: 1px solid var(--gris-200);
  padding: 56px 0 28px;
}
.pie .grid-pie {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}
@media (max-width: 800px) { .pie .grid-pie { grid-template-columns: 1fr 1fr; } }
.pie h4 { color: var(--negro); font-family: var(--fuente-texto); font-size: .85rem; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 16px; }
.pie a { text-decoration: none; color: var(--gris-700); font-size: .92rem; }
.pie a:hover { color: var(--verde); }
.pie ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.pie .logo { color: var(--negro); }
.pie .marca-desc { max-width: 320px; font-size: .92rem; margin-top: 12px; }
.pie .linea-final {
  border-top: 1px solid var(--gris-200);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  font-size: .82rem;
  color: var(--gris-400);
  flex-wrap: wrap;
  gap: 12px;
}