/* Navigation */
nav {
  background: var(--light);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  padding-top: 10px;
  top: 0;
  z-index: 1000;
}

body.is-page-transitioning {
  overflow: hidden;
}

.page-transition-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  background: rgba(255, 255, 255, 0.2);
  box-shadow: 0 18px 50px rgba(31, 42, 68, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transform: translateY(-100%);
  transition: transform 0.7s cubic-bezier(0.2, 0.9, 0.2, 1);
  will-change: transform;
  overflow: hidden;
}

.page-transition-frame {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  background: var(--light);
  opacity: 0.98;
}

.page-transition-overlay.is-active {
  transform: translateY(0);
}

.page-transition-overlay.is-loaded {
  transform: translateY(-100%);
}

@media (prefers-reduced-motion: reduce) {
  .page-transition-overlay {
    transition: none;
  }
}

.nav-scroll-track {
  width: 100%;
  height: 3px;
  background: rgba(244, 124, 32, 0.18);
}

.nav-scroll-fill {
  width: 0;
  height: 100%;
  background: var(--orange);
  transition: width 0.08s linear;
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  opacity: 1;
  animation: slideInLeft 0.5s forwards;
}

.nav-logo img {
  height: 100px;
  width: auto;
}

.nav-logo-text {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--dark);
}

.nav-links {
  display: none;
  gap: 2rem;
  align-items: center;
  opacity: 1;
  animation: slideInDown 0.5s 0.2s forwards;
}

.nav-links a {
  text-decoration: none;
  color: var(--dark);
  transition: color 0.3s;
}

.nav-links a:hover {
  color: var(--orange);
}

.nav-links .btn-contact {
  background: var(--orange);
  color: var(--light);
  padding: 0.5rem 1.5rem;
  border-radius: 8px;
  transition: background 0.3s, transform 0.3s, box-shadow 0.3s;
}

.nav-links .btn-contact:hover {
  background: #e56d10;
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(244, 124, 32, 0.18);
}

.mobile-menu-btn {
  display: block;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--dark);
  font-size: 1.5rem;
}

.mobile-nav {
  display: none;
  padding: 1rem;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-nav.active {
  display: flex;
}

.mobile-nav a {
  text-decoration: none;
  color: var(--dark);
  padding: 0.5rem 0;
  transition: color 0.3s;
}

.mobile-nav a:hover {
  color: var(--orange);
}

.mobile-nav .btn-contact {
  background: var(--orange);
  color: var(--light);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-align: center;
  margin-top: 1rem;
  transition: background 0.3s, transform 0.3s, box-shadow 0.3s;
}

.mobile-nav .btn-contact:hover {
  background: #e56d10;
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(244, 124, 32, 0.18);
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }

  .mobile-menu-btn {
    display: none;
  }
}

/* mobile adjustments */
@media (max-width: 767px) {
  .nav-logo img { height: 44px; }
  .nav-logo-text { font-size: 1rem; }
  nav { padding-top: 6px; }
  .nav-scroll-track { height: 2px; }
}