/* =====================================================================
   Métodos Expertos — Hoja de estilos
   Paleta: granate oficial #9D0300 + gris #B2B2B2 + acento teal moderno
   Enfoque: mobile-first, variables CSS, accesible
   ===================================================================== */

/* ---------- 1. Variables de marca (de docs/paleta-colores.md) ---------- */
:root {
  /* Marca */
  --color-primary:        #9D0300;
  --color-primary-dark:   #6E0200;
  --color-primary-light:  #C62828;

  /* Acento teal */
  --color-accent:         #0E7C7B;
  --color-accent-light:   #14A3A1;

  /* Neutros */
  --color-ink:            #1F2328;
  --color-gray-700:       #4A4F55;
  --color-gray:           #B2B2B2;
  --color-gray-100:       #F4F5F7;
  --color-white:          #FFFFFF;

  /* Alias de uso */
  --bg-page:              var(--color-white);
  --bg-alt:               var(--color-gray-100);
  --text-base:            var(--color-ink);
  --text-muted:           var(--color-gray-700);
  --border:               var(--color-gray);

  /* Tipografía */
  --font-head: 'Montserrat', system-ui, sans-serif;
  --font-body: 'Source Sans 3', system-ui, sans-serif;

  /* Medidas */
  --maxw: 1140px;
  --radius: 12px;
  --shadow: 0 6px 24px rgba(31, 35, 40, 0.08);
  --shadow-hover: 0 12px 32px rgba(157, 3, 0, 0.14);
  --header-h: 76px;
}

/* ---------- 2. Reset básico ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  font-family: var(--font-body);
  color: var(--text-base);
  background: var(--bg-page);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; height: auto; }
a { color: var(--color-primary); text-decoration: none; }
h1, h2, h3 { font-family: var(--font-head); line-height: 1.2; color: var(--color-ink); }

/* ---------- 3. Utilidades ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 20px;
}

.section { padding: 72px 0; }
.section--alt { background: var(--bg-alt); }

.section__head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.section__title { font-size: clamp(1.7rem, 4vw, 2.4rem); color: var(--color-primary); }
.section__title--light { color: var(--color-white); }
.section__subtitle { margin-top: 12px; color: var(--text-muted); font-size: 1.1rem; }

/* ---------- 4. Botones ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  padding: 13px 26px;
  border-radius: 50px;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
  border: 2px solid transparent;
}
.btn:hover { transform: translateY(-2px); }
.btn:focus-visible { outline: 3px solid var(--color-accent-light); outline-offset: 2px; }

.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-dark); box-shadow: var(--shadow-hover); }

.btn--ghost { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn--ghost:hover { background: var(--color-primary); color: #fff; }

.btn--light { background: #fff; color: var(--color-primary); }
.btn--light:hover { background: var(--color-gray-100); }

.btn--outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }
.btn--outline-light:hover { background: rgba(255,255,255,.12); }

/* ---------- 5. Header / Navegación ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
}
.header__logo img { width: 200px; height: auto; }

.nav__list {
  list-style: none;
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 0;
}
.nav__link {
  font-family: var(--font-head);
  font-weight: 600;
  color: var(--color-ink);
  padding: 10px 14px;
  border-radius: 8px;
  transition: color .15s, background .15s;
}
.nav__link:hover { color: var(--color-primary); }
.nav__link--cta {
  background: var(--color-primary);
  color: #fff;
  margin-left: 6px;
}
.nav__link--cta:hover { background: var(--color-primary-dark); color: #fff; }

/* Botón hamburguesa (oculto en escritorio) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle__bar {
  width: 26px; height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
}

/* ---------- 6. Hero ---------- */
.hero {
  background:
    linear-gradient(135deg, rgba(157,3,0,.92), rgba(110,2,0,.92)),
    radial-gradient(circle at 80% 20%, rgba(14,124,123,.5), transparent 60%);
  color: #fff;
  padding: clamp(64px, 12vw, 128px) 0;
}
.hero__eyebrow {
  text-transform: uppercase;
  letter-spacing: 3px;
  font-weight: 700;
  font-family: var(--font-head);
  color: rgba(255,255,255,.75);
  font-size: .85rem;
  margin-bottom: 14px;
}
.hero__title {
  color: #fff;
  font-size: clamp(2rem, 5.5vw, 3.4rem);
  font-weight: 800;
  max-width: 15ch;
}
.hero__text {
  margin: 22px 0 32px;
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  max-width: 52ch;
  color: rgba(255,255,255,.92);
}
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero .btn--ghost { color: #fff; border-color: rgba(255,255,255,.7); }
.hero .btn--ghost:hover { background: #fff; color: var(--color-primary); }

/* ---------- 7. Grids y tarjetas ---------- */
.grid { display: grid; gap: 24px; }
.grid--4 { grid-template-columns: 1fr; }

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  display: flex;
  flex-direction: column;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--color-primary-light); }
.card__icon {
  font-size: 2rem;
  width: 60px; height: 60px;
  display: grid; place-items: center;
  background: var(--color-gray-100);
  border-radius: 14px;
  margin-bottom: 16px;
}
.card__title { font-size: 1.2rem; color: var(--color-primary); margin-bottom: 10px; }
.card__text { color: var(--text-muted); margin-bottom: 14px; }
.card__list { padding-left: 18px; margin-bottom: 18px; color: var(--text-base); }
.card__list li { margin-bottom: 6px; }
.card__link {
  margin-top: auto;
  font-family: var(--font-head);
  font-weight: 600;
  color: var(--color-accent);
  transition: color .15s, gap .15s;
}
.card__link:hover { color: var(--color-accent-light); }

/* Minicards (servicios adicionales) */
.minicard {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  border-top: 4px solid var(--color-accent);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}
.minicard__title { color: var(--color-primary); font-size: 1.1rem; margin-bottom: 10px; }
.minicard p { color: var(--text-muted); margin-bottom: 14px; }
.minicard .card__link { margin-top: auto; }

/* Tarjetas de artículo (sección Artículos) */
.articulo-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.articulo-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--color-accent); }
.articulo-card__tag {
  align-self: flex-start;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: .72rem;
  letter-spacing: .5px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 50px;
  margin-bottom: 14px;
}
.articulo-card__title { font-size: 1.15rem; color: var(--color-primary); margin-bottom: 10px; }
.articulo-card p { color: var(--text-muted); margin-bottom: 16px; }
.articulo-card .card__link { margin-top: auto; }

/* ---------- 8. Nosotros ---------- */
.nosotros { display: grid; gap: 40px; grid-template-columns: 1fr; align-items: center; }
.nosotros__text p { margin-bottom: 16px; color: var(--text-base); }
.nosotros__stats { display: grid; gap: 18px; grid-template-columns: repeat(2, 1fr); }
.stat {
  text-align: center;
  background: var(--color-gray-100);
  border-radius: var(--radius);
  padding: 24px 12px;
}
.stat__number {
  display: block;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 2rem;
  color: var(--color-primary);
}
.stat__label { font-size: .9rem; color: var(--text-muted); }

/* ---------- 9. Formación ---------- */
.curso {
  background: #fff;
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  border-top: 5px solid var(--color-primary);
}
.curso__badge {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: .8rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 50px;
  margin-bottom: 16px;
}
.curso__title { font-size: clamp(1.3rem, 3vw, 1.8rem); color: var(--color-primary); margin-bottom: 14px; }
.curso p { color: var(--text-muted); margin-bottom: 14px; }
.curso__note { font-weight: 600; color: var(--color-accent); }
.curso .btn { margin-top: 10px; }

/* ---------- 10. Aliados ---------- */
.aliados {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: center;
  align-items: center;
}
.aliado {
  filter: grayscale(100%);
  opacity: .7;
  transition: filter .25s, opacity .25s, transform .25s;
}
.aliado:hover { filter: grayscale(0); opacity: 1; transform: scale(1.05); }
.aliado img { max-height: 72px; width: auto; }

/* ---------- 11. Contacto ---------- */
.section--contacto {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  text-align: center;
}
.contacto__text { color: rgba(255,255,255,.9); font-size: 1.15rem; margin: 12px 0 28px; }
.contacto__actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- 12. Footer ---------- */
.footer { background: var(--color-ink); color: rgba(255,255,255,.8); padding-top: 48px; }
.footer__inner {
  display: grid;
  gap: 28px;
  grid-template-columns: 1fr;
  padding-bottom: 32px;
}
.footer__brand img { background: #fff; padding: 8px 12px; border-radius: 8px; margin-bottom: 12px; }
.footer__brand p { color: rgba(255,255,255,.65); font-size: .95rem; }
.footer__nav { display: flex; flex-direction: column; gap: 8px; }
.footer__nav a, .footer__contact a { color: rgba(255,255,255,.8); transition: color .15s; }
.footer__nav a:hover, .footer__contact a:hover { color: #fff; }
.footer__contact p { margin-bottom: 6px; }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.12);
  padding: 20px;
  text-align: center;
  font-size: .85rem;
  color: rgba(255,255,255,.6);
}
.footer__legal { color: rgba(255,255,255,.75); }
.footer__legal:hover { color: #fff; }

/* ---------- 13. Animación de aparición (reveal) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- 14. Responsive (tablet y escritorio) ---------- */
@media (min-width: 640px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
  .nosotros { grid-template-columns: 1.4fr 1fr; }
  .footer__inner { grid-template-columns: 1.5fr 1fr 1.2fr; }
}

/* Menú móvil: por debajo de 860px */
@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .nav__list {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 10px 20px 20px;
    box-shadow: var(--shadow);
    transform: translateY(-120%);
    transition: transform .3s ease;
  }
  .nav__list.is-open { transform: translateY(0); }
  .nav__link { display: block; width: 100%; padding: 14px 10px; }
  .nav__link--cta { margin: 8px 0 0; text-align: center; }

  /* Hamburguesa -> X cuando está abierto */
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
}

/* ---------- 15. Respeto a preferencias de movimiento ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .card:hover, .aliado:hover { transform: none; }
}