/* ============================================================
   COMPONENTS — nav + botones (compartido por todas las páginas)
   ============================================================ */

/* --- NAV (hamburguesa fija; color adapta a fondo claro/oscuro) ------ */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: clamp(1.1rem, 3vw, 2rem) var(--gutter);
  pointer-events: none; /* deja pasar clicks salvo en logo/toggle */
}
.nav__logo,
.nav__toggle { pointer-events: auto; }

.nav__logo {
  font-family: var(--font-ui);
  font-weight: var(--fw-medium);
  font-size: 1.125rem;
  letter-spacing: -0.01em;
  color: var(--c-dark);
  transition: color 0.3s var(--ease-out);
}

/* botón hamburguesa (a la derecha) */
.nav__toggle {
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  background: none;
  border: 0;
  cursor: pointer;
}
.nav__toggle span {
  position: absolute;
  left: 50%;
  width: 1.6rem;
  height: 2px;
  background: var(--c-dark);
  transform: translateX(-50%);
  transition: transform 0.35s var(--ease-out), opacity 0.2s, background 0.3s var(--ease-out);
}
.nav__toggle span:nth-child(1) { top: calc(50% - 5px); }
.nav__toggle span:nth-child(2) { top: calc(50% + 5px); }
body.nav-open .nav__toggle span:nth-child(1) { top: 50%; transform: translateX(-50%) rotate(45deg); }
body.nav-open .nav__toggle span:nth-child(2) { top: 50%; transform: translateX(-50%) rotate(-45deg); }

/* Sobre secciones oscuras → logo y hamburguesa en blanco */
body.nav-dark-bg .nav__logo { color: #fff; }
body.nav-dark-bg .nav__toggle span { background: #fff; }
/* Menú abierto → el panel es claro, así que el header vuelve a oscuro */
body.nav-open .nav__logo { color: var(--c-dark); }
body.nav-open .nav__toggle span { background: var(--c-dark); }

/* panel overlay del menú (separado del nav para no heredar el blend) */
.nav__panel {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: clamp(2rem, 6vh, 3.5rem);
  padding: clamp(6rem, 12vh, 9rem) var(--gutter) var(--gutter);
  background: var(--c-ghost);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s var(--ease-out), visibility 0.4s;
}
body.nav-open .nav__panel { opacity: 1; visibility: visible; }

.nav__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: clamp(0.4rem, 1.5vh, 1rem);
}
.nav__list a {
  font-family: var(--font-display);
  font-weight: var(--fw-medium);
  font-size: var(--fs-h2);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--c-dark);
  transition: color 0.3s var(--ease-out);
}
.nav__list a:hover { color: var(--c-purple); }

/* fila de acciones del panel: idioma + tema (van ARRIBA del menú) */
.nav__actions {
  order: -1;            /* primero, encima de los enlaces */
  display: flex;
  align-items: center;
  gap: 1rem;
  align-self: flex-start;
  margin-bottom: 0.5rem;
}

.nav__lang {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 4rem;          /* mismo ancho que el switch */
  height: 2.3rem;
  font-family: var(--font-ui);
  font-size: var(--fs-h6);
  font-weight: var(--fw-medium);
  letter-spacing: 0.08em;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: var(--radius);
  color: var(--c-dark);
  transition: border-color 0.3s var(--ease-out), color 0.3s var(--ease-out);
}
.nav__lang:hover { border-color: var(--c-purple); color: var(--c-purple); }

/* --- Foco visible (WCAG 2.4.7) -----------------------------
   currentColor se adapta al texto de cada elemento, así contrasta
   sobre fondo claro y oscuro (p. ej. la hamburguesa en Mi Proceso). */
a:focus-visible,
button:focus-visible,
.nav__switch:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
  border-radius: 3px;
}

/* --- BOTONES (design system) ----------------------------- */
/* Button 1 (outline): transparente, borde negro, hover rellena de negro */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-ui);
  font-weight: var(--fw-medium);
  font-size: var(--fs-h6);
  letter-spacing: 0.02em;
  padding: 0.9rem 1.6rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.35s var(--ease-out), color 0.35s var(--ease-out),
    border-color 0.35s var(--ease-out);
}
.btn--outline {
  background: transparent;
  color: var(--c-black);
  border: 1px solid var(--c-black);
}
.btn--outline:hover {
  background: var(--c-black);
  color: var(--c-white);
}
/* Button 2 (filled): fondo oscuro, hover agrega borde púrpura */
.btn--filled {
  background: var(--c-dark);
  color: var(--c-white);
  border: 1px solid var(--c-dark);
}
.btn--filled:hover {
  border-color: var(--c-purple);
}