/* =================================================================
   NAVIGATION COMPONENTS - VELTECHLAB
   ================================================================= */

/* =================================================================
   HEADER NAVIGATION
   ================================================================= */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1020;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.header.scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(30px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
  height: 70px;
}

@media (min-width: 640px) {
  .header-container {
    padding: 0 1.5rem;
  }
}

@media (min-width: 1024px) {
  .header-container {
    padding: 0 2rem;
  }
}

/* Logo Section */
.logo-section {
  display: flex;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: #1a202c;
  font-weight: 700;
  font-size: 1.25rem;
  transition: all 0.3s ease;
}

.logo:hover {
  color: #3b82f6;
  transform: scale(1.02);
}

.logo-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.logo:hover .logo-img {
  transform: rotate(5deg);
}

.logo-text {
  font-family: 'Inter', sans-serif;
  font-weight: 800;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Main Navigation */
.main-nav {
  display: none;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  color: #4a5568;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  border-radius: 0.5rem;
  transition: all 0.3s ease;
  position: relative;
}

.nav-link i {
  font-size: 0.75rem;
  opacity: 0.7;
}

.nav-link:hover {
  color: #3b82f6;
  background-color: rgba(59, 130, 246, 0.1);
  transform: translateY(-1px);
}

.nav-link.active {
  color: #3b82f6;
  background-color: rgba(59, 130, 246, 0.1);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background-color: #3b82f6;
  border-radius: 50%;
}

/* Dropdown Navigation */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: white;
  border-radius: 0.75rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(226, 232, 240, 0.8);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  z-index: 1000;
  padding: 0.5rem 0;
}

.nav-item.active .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 0.75rem 1rem;
  color: #4a5568;
  text-decoration: none;
  font-size: 0.875rem;
  transition: all 0.2s ease;
}

.dropdown-menu a:hover {
  background-color: #f7fafc;
  color: #3b82f6;
}

/* Auth Buttons */
.auth-buttons {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-outline {
  background: transparent;
  color: #3b82f6;
  border: 2px solid #3b82f6;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn-outline:hover {
  background: #3b82f6;
  color: white;
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 30px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1030;
}

@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }
}

.mobile-menu-toggle span {
  width: 100%;
  height: 3px;
  background: #4a5568;
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* =================================================================
   MOBILE NAVIGATION
   ================================================================= */

.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: 400px;
  height: 100vh;
  background: white;
  z-index: 1020;
  transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
  overflow-y: auto;
}

.mobile-nav.active {
  right: 0;
}

.mobile-nav-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1010;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.mobile-nav-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem;
  border-bottom: 1px solid #e2e8f0;
  background: #f8fafc;
}

.mobile-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mobile-logo-img {
  width: 32px;
  height: 32px;
}

.mobile-logo-text {
  font-weight: 700;
  font-size: 1.125rem;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mobile-nav-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: #4a5568;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
}

.mobile-nav-close:hover {
  background: #f1f5f9;
  color: #1a202c;
}

.mobile-nav-menu {
  list-style: none;
  margin: 0;
  padding: 1rem 0;
}

.mobile-nav-item {
  border-bottom: 1px solid #f1f5f9;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  color: #4a5568;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s ease;
}

.mobile-nav-link i {
  width: 20px;
  text-align: center;
  opacity: 0.7;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background: #f8fafc;
  color: #3b82f6;
}

.mobile-nav-link.active {
  font-weight: 600;
  border-right: 3px solid #3b82f6;
}

.mobile-auth-buttons {
  padding: 1.5rem;
  border-top: 1px solid #e2e8f0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* =================================================================
   BACK TO TOP BUTTON
   ================================================================= */

.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: 0 8px 32px rgba(59, 130, 246, 0.3);
  transition: all 0.3s ease;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  z-index: 1000;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(59, 130, 246, 0.4);
}

.back-to-top:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

/* =================================================================
   RESPONSIVE DESIGN
   ================================================================= */

@media (max-width: 767px) {
  .header-container {
    padding: 0 1rem;
  }
  
  .logo-text {
    display: none;
  }
  
  .mobile-nav {
    max-width: 100%;
  }
  
  .back-to-top {
    bottom: 1rem;
    right: 1rem;
    width: 45px;
    height: 45px;
    font-size: 1.125rem;
  }
}

@media (max-width: 480px) {
  .header-container {
    padding: 0 0.75rem;
  }
  
  .logo-img {
    width: 32px;
    height: 32px;
  }
  
  .mobile-nav-header {
    padding: 1rem;
  }
  
  .mobile-nav-link {
    padding: 0.875rem 1rem;
  }
  
  .mobile-auth-buttons {
    padding: 1rem;
  }
}

/* =================================================================
   ANIMATIONS
   ================================================================= */

@keyframes slideInRight {
  from {
    transform: translateX(100%);
  }
  to {
    transform: translateX(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* =================================================================
   ACCESSIBILITY
   ================================================================= */

.nav-link:focus,
.mobile-nav-link:focus,
.btn:focus {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

/* Skip navigation for screen readers */
.skip-nav {
  position: absolute;
  top: -40px;
  left: 6px;
  background: #3b82f6;
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  border-radius: 4px;
  z-index: 1030;
  transition: top 0.3s ease;
}

.skip-nav:focus {
  top: 6px;
}

/* =================================================================
   HIGH CONTRAST MODE
   ================================================================= */

@media (prefers-contrast: high) {
  .header {
    border-bottom: 2px solid #000;
  }
  
  .nav-link,
  .mobile-nav-link {
    border: 1px solid transparent;
  }
  
  .nav-link:hover,
  .mobile-nav-link:hover {
    border-color: #000;
  }
}

/* =================================================================
   REDUCED MOTION
   ================================================================= */

@media (prefers-reduced-motion: reduce) {
  .header,
  .mobile-nav,
  .back-to-top,
  .nav-link,
  .mobile-nav-link,
  .btn {
    transition: none;
  }
  
  .mobile-nav {
    right: 0;
  }
  
  .back-to-top {
    transform: none;
  }
}