/* ========================================
   HEADER STYLES
   ======================================== */

.site-header {
  background-color: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(71, 85, 105, 0.3);
  position: relative;
  z-index: 100;
  transition: all 200ms ease-in-out;
}

.site-header.sticky-header {
  position: sticky;
  top: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ========================================
   SITE BRANDING
   ======================================== */

.site-branding {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

.custom-logo {
  max-width: 50px;
  height: auto;
  display: block;
  border-radius: 0.5rem;
}

.site-branding-text {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.site-title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
}

.site-title a {
  background: linear-gradient(135deg, #818cf8 0%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  transition: all 200ms ease-in-out;
}

.site-title a:hover {
  filter: brightness(1.2);
}

.site-description {
  margin: 0;
  font-size: 0.75rem;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

/* ========================================
   MAIN NAVIGATION
   ======================================== */

.main-navigation {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-grow: 1;
  justify-content: flex-end;
}

.main-navigation ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 1rem;
}

.main-navigation li {
  margin: 0;
}

.main-navigation a {
  display: block;
  padding: 0.5rem 1rem;
  color: #cbd5e1;
  text-decoration: none;
  font-weight: 500;
  transition: all 200ms ease-in-out;
  border-radius: 0.5rem;
  position: relative;
}

.main-navigation a:hover {
  color: #818cf8;
  background-color: rgba(129, 140, 248, 0.1);
}

.main-navigation a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 1rem;
  right: 1rem;
  height: 2px;
  background-color: #818cf8;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 200ms ease-in-out;
}

.main-navigation a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.main-navigation .current_page_item > a,
.main-navigation .current-menu-item > a {
  color: #818cf8;
}

.main-navigation .current_page_item > a::after,
.main-navigation .current-menu-item > a::after {
  transform: scaleX(1);
}

/* ========================================
   MENU TOGGLE (HAMBURGER)
   ======================================== */

.menu-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  gap: 0.375rem;
}

.menu-toggle .hamburger {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.menu-toggle .hamburger span {
  width: 24px;
  height: 2px;
  background-color: #e2e8f0;
  border-radius: 2px;
  transition: all 200ms ease-in-out;
}

.menu-toggle[aria-expanded="true"] .hamburger span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle[aria-expanded="true"] .hamburger span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] .hamburger span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

.menu-label {
  display: none;
  margin-left: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
}

/* ========================================
   RESPONSIVE NAVIGATION
   ======================================== */

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .menu-label {
    display: inline-block;
  }

  .main-navigation {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(71, 85, 105, 0.3);
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 300ms ease-in-out;
  }

  .main-navigation[aria-expanded="true"] {
    max-height: 500px;
  }

  .main-navigation ul {
    flex-direction: column;
    width: 100%;
    gap: 0;
  }

  .main-navigation li {
    border-bottom: 1px solid rgba(71, 85, 105, 0.2);
  }

  .main-navigation a {
    padding: 1rem 1.5rem;
    border-radius: 0;
  }

  .main-navigation a::after {
    display: none;
  }

  .main-navigation a:hover {
    background-color: rgba(129, 140, 248, 0.15);
  }

  .header-container {
    flex-wrap: wrap;
    padding: 1rem;
  }

  .site-branding {
    flex-basis: 100%;
  }

  .main-navigation {
    flex-basis: 100%;
  }
}

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

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #818cf8;
  color: white;
  padding: 8px;
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

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

@keyframes headerSlideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.site-header {
  animation: headerSlideDown 0.5s ease-in-out;
}