/* ============================================
   DENERTEK — Header v4.0 — FULLY FIXED
   ============================================ */

:root {
  --blue-dark:   #002C5B;
  --blue-mid:    #008ECF;
  --blue-navy:   #004383;
  --orange:      #F66A00;
  --yellow:      #FFB800;
  --white:       #FFFFFF;
  --gray-dark:   #505050;
  --gray-light:  #F0F0F0;
  --header-h:    70px;
  --topbar-h:    36px;
  --total-h:     106px; /* topbar + navbar */
  --transition:  0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ---- SITE HEADER — Fixed entire block ---- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  /* When scrolled, topbar collapses so header shrinks */
  transition: transform var(--transition);
}

/* Body offset to prevent content hiding under fixed header */
body {
  padding-top: var(--total-h);
}

/* ---- TOPBAR ---- */
.header-topbar {
  background: rgba(0,20,50,0.97);
  height: var(--topbar-h);
  
  overflow: hidden;
  transition: height var(--transition), opacity var(--transition);
}
.header-topbar.hidden {
  height: 0;
  opacity: 0;
  pointer-events: none;
}

.topbar-inner {
  max-width: 1280px; margin: 0 auto;
  padding: 0 clamp(20px,4vw,40px);
  height: 100%; display: flex; align-items: center;
  justify-content: space-between; gap: 16px;
}
.topbar-left { display: flex; align-items: center; gap: 20px; }
.topbar-link {
  display: flex; align-items: center; gap: 6px;
  color: rgba(255,255,255,0.72); font-size: 12px;
  font-family: 'Barlow', 'Century Gothic', sans-serif;
  letter-spacing: .03em; transition: color var(--transition);
}
.topbar-link:hover { color: var(--orange); }
.topbar-link svg { flex-shrink: 0; opacity: .7; }
.topbar-right { display: flex; align-items: center; gap: 8px; }
.topbar-location {
  display: flex; align-items: center; gap: 6px;
  color: rgba(255,255,255,.5); font-size: 11.5px;
  font-family: 'Barlow', 'Century Gothic', sans-serif;
  letter-spacing: .05em;
}
.topbar-location svg { opacity: .6; }

.topbar-social {
  display: flex; align-items: center; justify-content: center;
  width: 26px; height: 26px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 6px;
  color: rgba(255,255,255,.55);
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}
.topbar-social:hover {
  background: var(--orange);
  border-color: var(--orange);
  color: #fff;
  transform: translateY(-2px);
}

.topbar-divider {
  width: 1px; height: 14px;
  background: rgba(255,255,255,.15);
  margin: 0 4px;
  flex-shrink: 0;
}

/* Elementos solo para móvil — ocultos en desktop */
.nav-mobile-header,
.nav-mobile-footer,
.nav-link-icon { display: none; }
.navbar {
  height: var(--header-h);
  background: #ffffff;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: 1px solid rgba(0,44,91,0.1);
  transition: background var(--transition), box-shadow var(--transition), height var(--transition);
}

.navbar.scrolled {
  background: #ffffff;
  box-shadow: 0 4px 24px rgba(0,44,91,.12);
  height: 62px;
  border-bottom-color: rgba(0,44,91,.15);
}

.nav-inner {
  max-width: 1280px; margin: 0 auto;
  padding: 0 clamp(20px,4vw,40px);
  height: 100%; display: flex; align-items: center; gap: 28px;
}

/* Logo */
.nav-logo { display: flex; align-items: center; flex-shrink: 0; }
.logo-desktop { height: 44px; width: auto; }
.logo-mobile  { height: 38px; width: auto; display: none; }

/* Nav links */
.nav-links {
  display: flex; align-items: center;
  gap: 2px; list-style: none; margin-left: auto;
}
.nav-link {
  display: inline-flex; align-items: center;
  padding: 8px 13px; border-radius: 7px;
  color: var(--blue-dark);
  font-family: 'Barlow Condensed', 'Century Gothic', sans-serif;
  font-size: 14px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}
.nav-link:hover { color: var(--orange); background: rgba(246,106,0,.06); }
.nav-link.active { color: var(--orange); }

/* Quote CTA */
.nav-actions { display: flex; align-items: center; gap: 10px; margin-left: 8px; flex-shrink: 0; }
.btn-quote {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 22px;
  background: var(--orange); color: #fff;
  font-family: 'Barlow Condensed', 'Century Gothic', sans-serif;
  font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  border: none; border-radius: 8px; cursor: pointer;
  white-space: nowrap; text-decoration: none;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(246,106,0,.3);
}
.btn-quote:hover { background: #e05e00; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(246,106,0,.42); }
.btn-quote svg { width: 14px; height: 14px; }

/* Hamburger button */
.hamburger {
  display: none; flex-direction: column; justify-content: center; align-items: center;
  gap: 5px; width: 40px; height: 40px;
  background: transparent; border: 1.5px solid rgba(0,44,91,.25);
  border-radius: 8px; cursor: pointer; padding: 6px;
  transition: border-color var(--transition);
  margin-left: auto;
}
.hamburger:hover { border-color: var(--orange); }
.hamburger span {
  display: block; width: 20px; height: 2px;
  background: var(--blue-dark); border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 1060px) {
  .logo-desktop { display: none; }
  .logo-mobile  { display: block; }
  .hamburger { display: flex; }

  .nav-inner { justify-content: space-between; }

  .nav-links {
    position: fixed;
    top: 0; right: -100%;
    width: min(320px, 88vw); height: 100vh;
    background: #ffffff;
    flex-direction: column; align-items: stretch;
    padding: 0; gap: 0;
    border-left: 1px solid rgba(0,44,91,.1);
    box-shadow: none;
    transition: right .4s cubic-bezier(.4,0,.2,1);
    z-index: 999; list-style: none;
    margin-left: 0;
    overflow-y: auto;
  }
  .nav-links.open { right: 0; box-shadow: -20px 0 60px rgba(0,0,0,.18); }

  /* Ocultar logo cuando menú abierto */
  .nav-logo--hidden { opacity: 0; pointer-events: none; transition: opacity .3s ease; }
  .nav-logo { transition: opacity .3s ease; }

  /* Overlay oscuro */
  .nav-overlay {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 998;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    transition: opacity .4s ease;
    opacity: 0;
  }
  .nav-overlay.active { display: block; opacity: 1; }

  /* Mobile header inside menu */
  .nav-mobile-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 20px;
    background: var(--blue-dark);
    border-bottom: 1px solid rgba(255,255,255,.08);
    flex-shrink: 0;
    position: sticky; top: 0; z-index: 2;
  }
  .nav-mobile-logo img { height: 36px; width: auto; }
  .nav-mobile-close {
    width: 36px; height: 36px;
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.15);
    border-radius: 8px; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    color: #fff; transition: background .2s;
  }
  .nav-mobile-close:hover { background: rgba(255,255,255,.2); }

  /* Nav items */
  .nav-links li { border-bottom: 1px solid rgba(0,44,91,.06); }
  .nav-links li:not(.nav-mobile-header):not(.nav-mobile-footer) { padding: 0 8px; }
  .nav-link {
    width: 100%; padding: 14px 12px;
    font-size: 15px; color: var(--blue-dark);
    display: flex; align-items: center; gap: 12px;
    border-radius: 8px;
    transition: background .2s, color .2s;
  }
  .nav-link:hover { background: rgba(0,44,91,.04); color: var(--orange); }
  .nav-link.active { color: var(--orange); background: rgba(246,106,0,.06); }

  /* Icon */
  .nav-link-icon {
    display: flex;
    width: 34px; height: 34px; flex-shrink: 0;
    background: rgba(0,44,91,.06);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    color: var(--blue-dark);
    transition: background .2s, color .2s;
  }
  .nav-link:hover .nav-link-icon,
  .nav-link.active .nav-link-icon {
    background: rgba(246,106,0,.12);
    color: var(--orange);
  }

  /* Mobile footer */
  .nav-mobile-footer {
    display: flex;
    margin-top: auto;
    padding: 14px 20px 18px;
    border-top: 1px solid rgba(0,44,91,.08);
    display: flex; flex-direction: column; gap: 8px;
    border-bottom: none !important;
    position: sticky; bottom: 0; z-index: 2;
    background: #ffffff;
  }
  .nav-mobile-contact-item {
    display: flex; align-items: center; gap: 10px;
    font-size: 13.5px; color: var(--gray-dark);
    padding: 10px 14px;
    background: #f7f9fc;
    border-radius: 8px;
    text-decoration: none;
    transition: background .2s, color .2s;
  }
  .nav-mobile-contact-item svg { color: var(--blue-mid); flex-shrink: 0; }
  .nav-mobile-contact-item:hover { background: #eef2f8; color: var(--blue-dark); }
  .nav-mobile-cta { display: none; }
  .nav-mobile-social {
    display: flex; gap: 10px; margin-top: 4px;
  }
  .nav-mobile-social-icon {
    width: 38px; height: 38px;
    background: rgba(0,44,91,.06);
    border: 1px solid rgba(0,44,91,.1);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    color: var(--blue-dark);
    transition: background .25s, color .25s, border-color .25s;
    text-decoration: none;
  }
  .nav-mobile-social-icon:hover {
    background: var(--orange);
    border-color: var(--orange);
    color: #fff;
  }
  .nav-legal-icon-btn {
    background: rgba(0,140,207,.08);
    border-color: rgba(0,140,207,.2);
    color: var(--blue-mid);
  }
  .nav-legal-icon-btn:hover {
    background: var(--blue-mid);
    border-color: var(--blue-mid);
    color: #fff;
  }

  .btn-quote { display: none; }
}

@media (max-width: 480px) {
  :root { --topbar-h: 0px; --total-h: var(--header-h); }
  .header-topbar { display: none; }
}