/* Header Variables */
:root {
  --header-height: 80px;
  --header-height-mobile: 70px;
  --header-padding: 1rem 2rem;
  --header-padding-mobile: 1rem 1.5rem;
  --nav-gap: 2rem;
  --nav-gap-mobile: 0.5rem;
  --logo-size: 1.8rem;
  --logo-size-mobile: 1.5rem;
  --nav-font-size: 1rem;
  --nav-font-size-mobile: 1.1rem;
  --hamburger-size: 1.8rem;
  --mobile-menu-padding: 2rem;
  --mobile-language-height: 100px;
}

/* Header Base Styles */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(20, 20, 20, 0.9);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  height: var(--header-height);
}

header.scrolled {
  background: rgba(20, 20, 20, 0.95);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
}

nav {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--header-padding);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

/* Logo */
.logo {
  font-size: var(--logo-size);
  font-weight: 700;
  color: var(--primary-foreground);
  transition: var(--transition);
  z-index: 1001;
}

.logo:hover {
  transform: scale(1.05);
  color: var(--primary);
}

.logo span {
  color: var(--primary);
}

/* Navigation Links */
.nav-links {
  display: flex;
  gap: var(--nav-gap);
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--primary-foreground);
  font-weight: 600;
  font-size: var(--nav-font-size);
  transition: var(--transition);
  position: relative;
  padding: 0.5rem 0;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
  border-radius: 2px;
}

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

.nav-links a:hover::after {
  width: 100%;
}

/* Active navigation link */
.nav-links a.active {
  color: var(--primary);
}

.nav-links a.active::after {
  width: 100%;
}

/* Language Switcher */
.language-switcher-desktop {
  display: flex;
  gap: 0.5rem;
  margin-left: 1.5rem;
}

.language-switcher-mobile {
  display: none;
}

.language-buttons {
  display: flex;
  gap: 0.5rem;
}

.lang-btn {
  background: transparent;
  color: var(--primary-foreground);
  border: 1.5px solid var(--primary-foreground);
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
  font-weight: 600;
  min-width: 50px;
  text-align: center;
}

.lang-btn:hover,
.lang-btn.active {
  background: var(--primary);
  color: var(--primary-foreground);
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--primary-foreground);
  font-size: var(--hamburger-size);
  padding: 0.5rem;
  transition: var(--transition);
  z-index: 1001;
  border-radius: 0.25rem;
}

.hamburger:hover {
  color: var(--primary);
  background: rgba(255, 255, 255, 0.1);
}

.hamburger.active {
  transform: rotate(90deg);
}

/* Mobile Styles */
@media (max-width: 992px) {
  header {
    height: var(--header-height-mobile);
  }
  
  nav {
    padding: var(--header-padding-mobile);
  }
  
  .logo {
    font-size: var(--logo-size-mobile);
  }
  
  .nav-links {
    display: none;
    flex-direction: column;
    position: fixed;
    top: var(--header-height-mobile);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(20, 20, 20, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 0;
    margin: 0;
    gap: 0;
    overflow: hidden;
  }

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

  .hamburger {
    display: block;
  }
  
  .language-switcher-desktop {
    display: none;
  }
  
  /* Mobile Menu Content Area */
  .nav-links__content {
    flex: 1;
    overflow-y: auto;
    padding: var(--mobile-menu-padding);
    padding-bottom: calc(var(--mobile-menu-padding) + var(--mobile-language-height));
    display: flex;
    flex-direction: column;
  }

  .nav-links ul {
    list-style: none;
    margin: 0;
    padding: 0;
    flex: 1;
  }

  .nav-links li {
    opacity: 0;
    transform: translateY(-10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.4s ease;
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav-links a {
    display: block;
    padding: 1.25rem 1rem;
    font-size: var(--nav-font-size-mobile);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-align: center;
    width: 100%;
  }

  .nav-links a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: left 0.5s ease;
  }

  .nav-links a:hover::before {
    left: 100%;
  }
  
  /* Mobile Language Switcher - Fixed at Bottom */
  .language-switcher-mobile {
    display: flex;
    flex-direction: column;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(20, 20, 20, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    margin: 0;
    padding: 1.5rem var(--mobile-menu-padding);
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    opacity: 0;
    transform: translateY(20px);
    min-height: var(--mobile-language-height);
    z-index: 1002;
    box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.3);
  }

  .language-switcher-mobile .language-buttons {
    justify-content: center;
    gap: 1rem;
  }

  .language-switcher-mobile .lang-btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: 0.5rem;
    min-width: 70px;
    flex: 1;
    max-width: 140px;
  }
}

/* Tablet Styles */
@media (max-width: 768px) and (min-width: 481px) {
  :root {
    --header-height-mobile: 65px;
    --mobile-menu-padding: 1.5rem;
    --mobile-language-height: 110px;
  }
  
  .nav-links a {
    padding: 1rem 0.75rem;
    font-size: 1rem;
  }
  
  .language-switcher-mobile {
    padding: 1.25rem var(--mobile-menu-padding);
  }
}

/* Small Mobile Styles */
@media (max-width: 480px) {
  :root {
    --header-height-mobile: 60px;
    --header-padding-mobile: 1rem;
    --mobile-menu-padding: 1rem;
    --mobile-language-height: 100px;
  }
  
  .nav-links a {
    padding: 0.875rem 0.5rem;
    font-size: 0.95rem;
  }
  
  .language-switcher-mobile {
    padding: 1rem var(--mobile-menu-padding);
  }
  
  .language-switcher-mobile .lang-btn {
    padding: 0.625rem 1rem;
    font-size: 0.9rem;
    min-width: 60px;
    max-width: 120px;
  }
  
  .language-switcher-mobile .language-buttons {
    gap: 0.75rem;
  }
}

/* Body scroll lock */
body.menu-open {
  overflow: hidden;
  position: fixed;
  width: 100%;
  height: 100%;
}

html.menu-open {
  overflow: hidden;
}

/* Enhanced Animations */
@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Custom Scrollbar for Mobile Menu */
.nav-links__content::-webkit-scrollbar {
  width: 4px;
}

.nav-links__content::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}

.nav-links__content::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 2px;
}

.nav-links__content::-webkit-scrollbar-thumb:hover {
  background: var(--primary-hover);
}

/* Ensure language switcher is always visible and animated */
@media (max-width: 992px) {
  .language-switcher-mobile.active {
    opacity: 1;
    transform: translateY(0);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  /* Make sure language switcher doesn't overlap with content */
  .nav-links__content {
    scroll-padding-bottom: var(--mobile-language-height);
    -webkit-overflow-scrolling: touch;
  }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
  .nav-links a {
    padding: 1.5rem 1rem;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .hamburger {
    padding: 1rem;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .lang-btn {
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .nav-links li,
  .hamburger,
  header,
  .lang-btn {
    transition: none;
    animation: none;
  }
  
  .nav-links.active li {
    opacity: 1;
    transform: none;
  }
  
  .language-switcher-mobile {
    transition: none;
  }
}

/* High contrast support */
@media (prefers-contrast: high) {
  header {
    background: rgba(0, 0, 0, 0.95);
    border-bottom: 2px solid var(--primary);
  }
  
  .nav-links a::after {
    height: 3px;
  }
}
/* Add these to your existing header.css */

/* General Responsive Styles */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Sections */
section {
    padding: 5rem 1rem;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1a202c;
}

.section-title p {
    color: #64748b;
    font-size: 1.1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 0.5rem;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: #3b82f6;
    color: white;
}

.btn-primary:hover {
    background: #2563eb;
    transform: translateY(-2px);
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    align-items: center;
}

.about-img img {
    width: 100%;
    max-width: 350px;
    border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.about-text h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #1a202c;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: #64748b;
    line-height: 1.7;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.skill-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: all 0.3s ease;
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* Footer */
footer {
    background: #1a202c;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Mobile Responsive for Content */
@media (max-width: 768px) {
    section {
        padding: 4rem 1rem;
    }

    .section-title h2 {
        font-size: 2rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    section {
        padding: 3rem 1rem;
    }

    .section-title h2 {
        font-size: 1.75rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }

    .skill-card {
        padding: 1.5rem;
    }
}