/* =====================================================
   header.css — System Bar / Glassmorphism
   Sticky · Mobile-first · HUD (clock + status)
   ===================================================== */

.header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  width: 100%;
  height: var(--header-height-sm);
  background: rgba(11, 15, 25, 0.35);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid transparent;
  transition:
    background var(--dur-base) var(--ease-smooth),
    border-color var(--dur-base) var(--ease-smooth),
    box-shadow var(--dur-base) var(--ease-smooth),
    height var(--dur-base) var(--ease-smooth);
}

/* Estado tras scroll: fondo más opaco, glow verde en el borde inferior */
.header.is-scrolled {
  background: rgba(11, 15, 25, 0.78);
  border-bottom-color: var(--accent-border-strong);
  box-shadow:
    0 1px 0 0 var(--accent-border-strong),
    0 8px 28px -8px rgba(0, 0, 0, 0.5),
    0 0 20px -8px var(--accent-glow);
  height: var(--header-height);
}

/* ---------- Container interno del header ---------- */
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding-inline: var(--container-pad);
  max-width: var(--container-max);
  margin: 0 auto;
  gap: var(--space-3);
}

/* ---------- Logo ---------- */
.header__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity var(--dur-fast) var(--ease-smooth);
}

.header__logo:hover { opacity: 0.85; color: inherit; }

.header__logo-img {
  height: 36px;
  width: auto;
  display: block;
}

/* ---------- Nav wrapper ---------- */
.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  flex: 1;
  justify-content: flex-end;
}

.header__menu {
  display: none; /* hidden on mobile */
  align-items: center;
  gap: var(--space-5);
}

.header__menu a {
  position: relative;
  display: inline-block;
  padding: var(--space-2) 0;
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--text-main);
  transition: color var(--dur-fast) var(--ease-smooth);
}

/* underline glow effect */
.header__menu a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  box-shadow: 0 0 8px var(--accent-glow);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width var(--dur-base) var(--ease-out-expo);
}

.header__menu a:hover,
.header__menu a:focus-visible,
.header__menu a.is-current {
  color: var(--accent-color);
}

.header__menu a:hover::after,
.header__menu a:focus-visible::after,
.header__menu a.is-current::after {
  width: 100%;
}

/* ---------- Language switcher (ES | EN) ---------- */
.header__lang {
  display: none; /* shown on tablet+ */
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
}

.header__lang-btn {
  padding: var(--space-1) var(--space-2);
  color: var(--text-dim);
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  transition: color var(--dur-fast) var(--ease-smooth),
              text-shadow var(--dur-fast) var(--ease-smooth);
}

.header__lang-btn:hover { color: var(--text-main); }

.header__lang-btn.is-active {
  color: var(--accent-color);
  text-shadow: 0 0 8px var(--accent-glow);
  font-weight: 600;
}

.header__lang-sep {
  color: var(--accent-border-strong);
  user-select: none;
}

/* ---------- CTA Hablemos ---------- */
.header__cta {
  display: none; /* hidden on mobile */
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: transparent;
  border: 1px solid var(--accent-color);
  border-radius: var(--radius-pill);
  color: var(--accent-color);
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition:
    background var(--dur-base) var(--ease-smooth),
    color var(--dur-base) var(--ease-smooth),
    box-shadow var(--dur-base) var(--ease-smooth),
    transform var(--dur-fast) var(--ease-spring);
}

.header__cta:hover {
  background: var(--accent-color);
  color: var(--bg-primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.header__cta-arrow {
  display: inline-block;
  transition: transform var(--dur-base) var(--ease-out-expo);
}

.header__cta:hover .header__cta-arrow {
  transform: translateX(4px);
}

/* ---------- Hamburger (mobile only) ---------- */
.header__hamburger {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background: transparent;
  border-radius: var(--radius-sm);
  z-index: var(--z-mobile-menu);
}

.header__hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-main);
  border-radius: 2px;
  transition:
    transform var(--dur-base) var(--ease-spring),
    opacity var(--dur-fast) var(--ease-smooth),
    background var(--dur-fast) var(--ease-smooth);
}

.header__hamburger:hover span { background: var(--accent-color); }

.header__hamburger.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--accent-color);
}
.header__hamburger.is-active span:nth-child(2) {
  opacity: 0;
}
.header__hamburger.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--accent-color);
}

/* =====================================================
   Mobile menu (fullscreen overlay)
   ===================================================== */

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-mobile-menu);
  background: rgba(11, 15, 25, 0.94);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-9) var(--container-pad);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition:
    opacity var(--dur-base) var(--ease-smooth),
    transform var(--dur-base) var(--ease-out-expo),
    visibility 0s linear var(--dur-base);
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition-delay: 0s;
}

.mobile-menu__menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
}

.mobile-menu__menu a {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  color: var(--text-main);
  font-weight: 700;
  letter-spacing: 0.01em;
  position: relative;
  padding: var(--space-2) var(--space-3);
}

.mobile-menu__menu a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--accent-color);
  box-shadow: 0 0 8px var(--accent-glow);
  transform: translateX(-50%);
  transition: width var(--dur-base) var(--ease-out-expo);
}

.mobile-menu__menu a:hover,
.mobile-menu__menu a:focus-visible,
.mobile-menu__menu a.is-current {
  color: var(--accent-color);
}

.mobile-menu__menu a:hover::after,
.mobile-menu__menu a:focus-visible::after,
.mobile-menu__menu a.is-current::after {
  width: 60%;
}

.mobile-menu__lang {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-body);
  color: var(--text-muted);
}

.mobile-menu__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--accent-color);
  color: var(--bg-primary);
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: var(--fs-body);
  box-shadow: var(--shadow-glow);
  transition: transform var(--dur-fast) var(--ease-spring),
              box-shadow var(--dur-base) var(--ease-smooth);
}

.mobile-menu__cta:hover {
  color: var(--bg-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-strong);
}

/* =====================================================
   TABLET (≥ 768px)
   ===================================================== */
@media (min-width: 768px) {
  .header {
    height: var(--header-height);
  }
  .header.is-scrolled {
    height: var(--header-height);
  }

  .header__menu {
    display: flex; /* menú inline */
  }

  .header__cta {
    display: inline-flex;
  }

  .header__hamburger {
    display: none; /* hamburguesa oculta en tablet+ */
  }

  .mobile-menu {
    display: none;
  }
}

/* =====================================================
   DESKTOP (≥ 1024px) — refinamientos
   ===================================================== */
@media (min-width: 1024px) {
  .header__inner {
    gap: var(--space-5);
  }

  .header__menu {
    gap: var(--space-6);
  }

  .header__lang {
    display: inline-flex;
  }

  .header__logo-img {
    height: 40px;
  }
}