/* ============================================================
   KATARAS EXCAVACIONES — header.css
   Paleta: Blanco #fff | Azul #1B3E96 | Amarillo #F5A800 | Negro #020202
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Barlow:wght@400;500;600;700&display=swap');

/* ── Variables globales (disponibles para todo el sitio) ── */
:root {
  --color-bg:       #ffffff;
  --color-dark:     #020202;
  --color-blue:     #1B3E96;
  --color-blue-dk:  #122b6b;
  --color-yellow:   #F5A800;
  --color-yellow-lt:#FFD166;

  --font-display:   'Bebas Neue', sans-serif;
  --font-body:      'Barlow', sans-serif;

  --header-h:       72px;
  --transition:     0.25s ease;
  --shadow-md:      0 4px 24px rgba(2,2,2,.14);
}

/* ── Reset base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-body);
  color: var(--color-dark);
  background: var(--color-bg);
  overflow-x: hidden;
}

/* Reservar espacio para el header fijo */
body::before {
  content: '';
  display: block;
  height: var(--header-h);
}

/* Evitar scroll cuando el menú móvil está abierto */
body.menu-open { overflow: hidden; }

/* Utilidad accesibilidad */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

/* ============================================================
   HEADER PRINCIPAL
   ============================================================ */
.main-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--color-bg);
  border-bottom: 3px solid var(--color-yellow);
  box-shadow: var(--shadow-md);
  z-index: 1000;

  /* Franja de acento superior */
  background-image: linear-gradient(
    to bottom,
    var(--color-blue) 4px,
    var(--color-bg)   4px
  );
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}

/* ============================================================
   LOGO
   ============================================================ */
.logo-container { flex-shrink: 0; }

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-img {
  height: 50px;
  width: auto;
  display: block;
  /* Si el logo tiene fondo, agregar filtro para adaptarlo */
  object-fit: contain;
  transition: opacity var(--transition);
}

.logo-link:hover .logo-img,
.logo-link:focus .logo-img {
  opacity: .85;
}

/* ============================================================
   NAVEGACIÓN PRINCIPAL
   ============================================================ */
.main-nav { margin-left: auto; }

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 2px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .875rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-dark);
  text-decoration: none;
  border-radius: 3px;
  position: relative;
  transition: color var(--transition), background var(--transition);
}

/* Línea inferior animada */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 14px; right: 14px;
  height: 2px;
  background: var(--color-yellow);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
  border-radius: 2px;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--color-blue);
  background: rgba(27,62,150,.06);
  outline: none;
}

.nav-link:hover::after,
.nav-link:focus::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-link.active {
  color: var(--color-blue);
}

.nav-link i {
  font-size: .85rem;
  opacity: .7;
  transition: opacity var(--transition);
}

.nav-link:hover i,
.nav-link.active i {
  opacity: 1;
}

/* ============================================================
   BOTÓN WHATSAPP (desktop)
   ============================================================ */
.header-whatsapp { flex-shrink: 0; }

.whatsapp-btn-header {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--color-yellow);
  color: var(--color-dark);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: .875rem;
  text-transform: uppercase;
  letter-spacing: .07em;
  text-decoration: none;
  border-radius: 3px;
  border: 2px solid var(--color-yellow);
  position: relative;
  overflow: hidden;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition),
              box-shadow var(--transition);
  white-space: nowrap;
}

/* Efecto de relleno al hover */
.whatsapp-btn-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--color-blue);
  transform: translateY(100%);
  transition: transform var(--transition);
  z-index: 0;
}

.whatsapp-btn-header > * { position: relative; z-index: 1; }

.whatsapp-btn-header:hover,
.whatsapp-btn-header:focus {
  color: #fff;
  border-color: var(--color-blue);
  box-shadow: 0 6px 20px rgba(27,62,150,.3);
  transform: translateY(-1px);
  outline: none;
}

.whatsapp-btn-header:hover::before,
.whatsapp-btn-header:focus::before {
  transform: translateY(0);
}

.whatsapp-btn-header i {
  font-size: 1.1rem;
}

/* ============================================================
   BOTÓN HAMBURGUESA (MÓVIL)
   ============================================================ */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  background: transparent;
  border: 2px solid var(--color-blue);
  border-radius: 3px;
  cursor: pointer;
  padding: 6px;
  margin-left: auto;
  transition: background var(--transition), border-color var(--transition);
}

.mobile-menu-toggle:hover,
.mobile-menu-toggle:focus {
  background: var(--color-blue);
  outline: none;
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-blue);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition),
              background var(--transition);
  transform-origin: center;
}

.mobile-menu-toggle:hover .hamburger-line,
.mobile-menu-toggle:focus .hamburger-line {
  background: var(--color-yellow);
}

/* Animación hamburguesa → X */
.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu-toggle.active {
  background: var(--color-blue);
  border-color: var(--color-blue);
}

.mobile-menu-toggle.active .hamburger-line {
  background: var(--color-yellow);
}

/* ============================================================
   RESPONSIVE — TABLET / MÓVIL
   ============================================================ */
@media (max-width: 1024px) {
  .nav-link {
    padding: 8px 10px;
    font-size: .8rem;
  }
}

@media (max-width: 860px) {
  .mobile-menu-toggle { display: flex; }

  .header-whatsapp { display: none; }

  .main-nav {
    /* Panel deslizante lateral */
    position: fixed;
    top: var(--header-h);
    right: 0;
    bottom: 0;
    width: min(320px, 85vw);
    background: var(--color-dark);
    padding: 32px 24px;
    transform: translateX(100%);
    transition: transform .35s cubic-bezier(.4,0,.2,1);
    overflow-y: auto;
    z-index: 999;

    /* Franja izquierda decorativa */
    border-left: 4px solid var(--color-yellow);
  }

  /* Overlay oscuro detrás del menú */
  .main-nav::before {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(2,2,2,.55);
    opacity: 0;
    transition: opacity .35s ease;
    pointer-events: none;
    z-index: -1;
  }

  .main-nav.active {
    transform: translateX(0);
    box-shadow: -8px 0 40px rgba(2,2,2,.4);
  }

  .main-nav.active::before {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .nav-item { width: 100%; }

  .nav-link {
    width: 100%;
    padding: 14px 16px;
    font-size: 1rem;
    color: #fff;
    border-radius: 4px;
    letter-spacing: .08em;
  }

  .nav-link::after {
    left: 16px; right: 16px;
    bottom: 8px;
  }

  .nav-link:hover,
  .nav-link:focus,
  .nav-link.active {
    color: var(--color-yellow);
    background: rgba(245,168,0,.1);
  }

  .nav-link i {
    color: var(--color-yellow);
    opacity: 1;
    font-size: .95rem;
  }

  /* Botón WhatsApp dentro del menú móvil */
  .nav-list::after {
    content: '';
    display: block;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,.1);
    width: 100%;
  }
}

@media (max-width: 480px) {
  .header-container { padding: 0 16px; gap: 16px; }
  .logo-img { height: 42px; }
}