/* Header Styles - Navigation Bar */

/* Navigation Bar Container */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: var(--navbar-height);
  background: rgba(79, 172, 254, 0.4);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  z-index: 1000;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
}

/* Navigation Container - Flex Wrapper */
.nav-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(12px, 4%, 20px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

/* Logo Styles */
.nav-logo {
  display: flex;
  align-items: center;
}

.nav-logo .logo-link {
  display: flex;
  align-items: center;
  gap: clamp(8px, 2vw, 12px);
  color: var(--primary-color);
  text-decoration: none;
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  font-weight: 700;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  white-space: nowrap;
  overflow: hidden;
  transition: transform 0.3s ease;
}

.nav-logo .logo-link:hover {
  transform: scale(1.05);
}

.nav-logo svg {
  color: var(--secondary-color);
  flex-shrink: 0;
  width: clamp(24px, 5vw, 32px);
  height: clamp(24px, 5vw, 32px);
  transition: color 0.3s ease;
}

.nav-logo .logo-image {
  height: clamp(40px, 8vw, 60px);
  width: auto;
  max-width: 250px;
  object-fit: contain;
  flex-shrink: 0;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: clamp(1.5rem, 3vw, 2rem);
  margin: 0;
  padding: 0;
  align-items: center;
}

.nav-menu a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  font-size: clamp(0.9rem, 1.5vw, 1rem);
  transition: all 0.3s ease;
  position: relative;
  padding: 8px 0;
  white-space: nowrap;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary-color);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  inline-size: 0;
  block-size: 2px;
  inset-block-end: 0;
  inset-inline-start: 0;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transition: width 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  inline-size: 100%;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-light);
  cursor: pointer;
  padding: 8px;
  flex-shrink: 0;
  inline-size: 40px;
  block-size: 40px;
  align-items: center;
  justify-content: center;
}

.mobile-menu-btn:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.mobile-menu {
  /* slide-in panel from the right on mobile devices */
  position: fixed;
  /* cover the entire viewport so menu overlays all pages */
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100vw;
  height: 100vh;
  background: #4facfe;
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  padding: 1rem;
  gap: 0.5rem;
  border-block-start: 1px solid rgba(0, 0, 0, 0.1);
  /* start off-screen to the right */
  /* start fully off-screen to the right */
  transform: translateX(100%);
  transition: transform 300ms cubic-bezier(.2,.8,.2,1), opacity 200ms ease;
  opacity: 0;
  /* allow scrolling if items overflow */
  overflow-y: auto;
  box-shadow: -8px 0 24px rgba(0, 0, 0, 0.12);
  z-index: 1100; /* sit above navbar and content when open */
}

.mobile-menu.active {
  transform: translateX(0);
  opacity: 1;
}

/* adjust top offset for smaller nav height on narrow screens */
@media (max-width: 480px) {
  .mobile-menu {
    top: var(--navbar-height-mobile);
  }
}

.mobile-menu a {
  padding: 1rem;
  border-radius: 8px;
  transition: background 0.3s ease;
  color: var(--text-light);
  text-decoration: none;
}

.mobile-menu a:hover,
.mobile-menu a.active {
  background: rgba(255, 255, 255, 0.1);
  color: var(--primary-color);
}

/* Responsive */
@media (max-width: 480px) {
  .navbar {
    block-size: var(--navbar-height-mobile);
  }

  .nav-container {
    padding: 0 10px;
    block-size: var(--navbar-height-mobile);
  }

  .nav-logo .logo-link {
    font-size: 1.1rem;
    gap: 8px;
  }

  .nav-logo svg {
    inline-size: 24px;
    block-size: 24px;
  }

  .nav-menu.desktop-menu {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .mobile-menu {
    padding: 0.75rem;
    gap: 0.25rem;
  }

  .mobile-menu a {
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
  }

  main {
    /* keep content visible below the shorter navbar */
    padding-block-start: var(--navbar-height-mobile);
  }
}

@media (min-width: 481px) and (max-width: 768px) {
  .nav-menu.desktop-menu {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .nav-container {
    padding: 0 15px;
  }

  .nav-logo .logo-link {
    font-size: 1.3rem;
  }
}

@media (min-width: 769px) {
  .nav-menu.desktop-menu {
    display: flex !important;
  }

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

  .mobile-menu {
    display: none;
  }
}