.header-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
}

header {
  background: rgba(15, 45, 66, 0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s;
}

header.scrolled {
  box-shadow: 0 4px 20px rgba(15, 45, 66, 0.5);
}

.header-nav {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header.scrolled .header-nav {
  padding: 0.7rem 5%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  transition: transform 0.2s;
}

.nav-logo:hover {
  transform: translateY(-1px);
}

.nav-logo-img {
  width: 100px;
  height: 100px;
  transition: all 0.3s;
}

header.scrolled .nav-logo-img {
  width: 80px;
  height: 80px;
}

.nav-logo-text {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.01em;
}

.nav-logo-text span {
  color: var(--orange);
}

.nav-main {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

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

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0;
  cursor: pointer;
}

.nav-link:hover,
.nav-item:hover > .nav-link {
  color: var(--white);
}

.dropdown-arrow {
  width: 12px;
  height: 12px;
  stroke: currentColor;
  transition: transform 0.2s;
}

.nav-item:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.mega-menu {
  position: absolute;
  top: 100%;
  left: 0;
  transform: translateY(-10px);
  background: rgba(15, 45, 66, 0.98);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-sky);
  border-radius: 12px;
  padding: 2rem;
  margin-top: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  width: auto;
  min-width: 520px;
  max-width: 760px;
}

.nav-item:nth-child(1) .mega-menu {
  min-width: 460px;
  max-width: 520px;
}

.nav-item:nth-child(2) .mega-menu {
  min-width: 620px;
  max-width: 760px;
}

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

.mega-menu-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

/* Frameworks menu - 2 columns layout */
.frameworks-grid {
  grid-template-columns: 1fr 1fr;
}

.mega-menu-col {
  display: flex;
  flex-direction: column;
}

.mega-menu-title {
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--sky);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mega-menu-title::before {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--orange);
}

.mega-menu-links {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.mega-menu-item {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  padding: 0.8rem;
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.mega-menu-item:hover {
  background: var(--sky-glow);
  border-left-color: var(--orange);
  transform: translateX(4px);
}

.mega-menu-icon {
  width: 40px;
  height: 40px;
  background: var(--orange-glow);
  border: 1px solid var(--border-orange);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mega-menu-icon svg {
  width: 18px;
  height: 18px;
  stroke: var(--orange);
}

.mega-menu-content h4 {
  font-family: var(--font-head);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.2rem;
}

.mega-menu-content p {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.nav-actions {
  display: flex;
  gap: 0.8rem;
  align-items: center;
}

.nav-cta {
  background: var(--orange);
  color: var(--white);
  padding: 0.65rem 1.5rem;
  border-radius: 7px;
  font-weight: 600;
  font-size: 0.88rem;
  text-decoration: none;
  font-family: var(--font-head);
  transition: all 0.2s;
  box-shadow: 0 3px 12px rgba(240, 122, 48, 0.3);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-cta:hover {
  background: var(--orange-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(240, 122, 48, 0.45);
}

.nav-cta svg {
  width: 14px;
  height: 14px;
}

.mobile-toggle {
  display: none;
}

@media (max-width: 1024px) {
  .mega-menu {
    width: auto;
    min-width: 100%;
    max-width: calc(100vw - 2rem);
    padding: 1.5rem;
  }
  .mega-menu-grid {
    gap: 1.5rem;
  }
  .nav-item:nth-child(1) .mega-menu {
    min-width: 100%;
    max-width: calc(100vw - 2rem);
  }
  .nav-item:nth-child(2) .mega-menu {
    min-width: 100%;
    max-width: calc(100vw - 2rem);
  }
  .nav-item:nth-child(2) .mega-menu-grid:not(.frameworks-grid) {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
  }
  .mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--white);
    transition: all 0.3s;
    border-radius: 2px;
  }
  .nav-main {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(15, 45, 66, 0.98);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--border);
    padding: 2rem 5%;
    gap: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    transition: all 0.3s;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
    width: 100%;
    box-sizing: border-box;
  }
  .nav-main.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .header-nav {
    padding: 1rem 3%;
  }
  .nav-logo-img {
    width: 80px;
    height: 80px;
  }
  .nav-logo-text {
    font-size: 1.1rem;
  }
  .nav-link {
    font-size: 0.95rem;
    justify-content: space-between;
  }
  .mega-menu {
    position: static;
    transform: none !important;
    opacity: 0;
    visibility: hidden;
    min-width: 0;
    max-width: 100%;
    width: 100%;
    margin-top: 0.5rem;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, opacity 0.3s, visibility 0.3s, padding 0.3s;
    box-sizing: border-box;
    box-shadow: none;
    border-radius: 8px;
    left: auto !important;
  }
  .nav-item.dropdown-open .mega-menu {
    opacity: 1;
    visibility: visible;
    max-height: 1200px;
    padding: 1rem;
  }
  .mega-menu-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
    width: 100%;
  }
  .nav-menu {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }
  .nav-item {
    width: 100%;
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
  }
  .mega-menu-col,
  .mega-menu-links {
    width: 100%;
  }
  .mega-menu-item {
    flex-direction: row;
    align-items: flex-start;
    width: 100%;
    transform: none !important;
  }
  .mega-menu-item:hover {
    transform: none !important;
  }
  .nav-actions {
    flex-direction: column;
    width: 100%;
    gap: 1rem;
  }
  .nav-cta {
    width: 100%;
    justify-content: center;
  }
}

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

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

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