/* Modern Fixed Header - Enhanced Accessibility & Design */

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-yellow);
  color: #1a1a1a;
  padding: 8px;
  text-decoration: none;
  border-radius: 4px;
  font-weight: 600;
  z-index: 10000;
  transition: top 0.3s ease;
}

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

/* Modern Fixed Header */
.site-header.modern-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  transition: all 0.3s ease;
}

.site-header.modern-header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

.header-container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-6);
  min-height: 70px;
}

/* Modern Brand Section */
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: transform 0.2s ease;
}

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

.site-logo {
  height: 45px;
  width: auto;
  display: block;
}

.site-title {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.site-title .name {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-text-strong);
  letter-spacing: 0.5px;
}

.site-title .subtitle {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

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

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

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: var(--radius-s);
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 215, 0, 0.1), transparent);
  transition: left 0.5s ease;
}

.nav-link:hover::before {
  left: 100%;
}

.nav-link:hover {
  color: var(--color-yellow-600);
  background: rgba(255, 215, 0, 0.1);
  transform: translateY(-1px);
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-yellow);
  outline-offset: 2px;
}

.nav-icon {
  font-size: 1rem;
  transition: transform 0.2s ease;
}

.nav-link:hover .nav-icon {
  transform: scale(1.1);
}

.nav-text {
  font-weight: 500;
}

/* Special Donate Button */
.nav-donate {
  background: var(--color-yellow);
  color: #1a1a1a !important;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(255, 215, 0, 0.3);
}

.nav-donate:hover {
  background: var(--color-yellow-600);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
}

/* Mobile Controls */
.mobile-controls {
  display: flex;
  align-items: center;
}

/* Responsive Design */
@media (min-width: 768px) {
  .main-nav {
    display: block;
  }
  
  .mobile-controls {
    display: none;
  }
  
  .site-title .name {
    font-size: 1.2rem;
  }
  
  .site-title .subtitle {
    font-size: 0.8rem;
  }
}

@media (min-width: 1024px) {
  .header-container {
    padding: var(--space-4) var(--space-8);
  }
  
  .nav-list {
    gap: var(--space-4);
  }
  
  .nav-link {
    padding: var(--space-3) var(--space-4);
    font-size: 1rem;
  }
}

/* Main content spacing for fixed header */
body {
  padding-top: 70px; /* Account for fixed header height */
}

/* Accessibility and motion preferences */
@media (prefers-reduced-motion: reduce) {
  .nav-link,
  .logo-link,
  .site-header.modern-header {
    transition: none;
  }
}

/* Admin Navigation Button */
.nav-admin {
  background: linear-gradient(135deg, #dc2626 0%, #ef4444 100%) !important;
  color: white !important;
  border: 1px solid #dc2626 !important;
  position: relative;
  overflow: hidden;
}

.nav-admin::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.nav-admin:hover::before {
  left: 100%;
}

.nav-admin:hover {
  background: linear-gradient(135deg, #b91c1c 0%, #dc2626 100%) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
}

.nav-admin .nav-icon {
  filter: brightness(0) invert(1);
}

/* Mobile Admin Button */
.mobile-admin {
  background: linear-gradient(135deg, #dc2626 0%, #ef4444 100%) !important;
  color: white !important;
  border: 1px solid #dc2626 !important;
  margin-top: 0.5rem;
}

.mobile-admin:hover {
  background: linear-gradient(135deg, #b91c1c 0%, #dc2626 100%) !important;
}

.mobile-admin .mobile-nav-icon {
  filter: brightness(0) invert(1);
}

/* Statistics Link Styling */
.nav-link[href*="statistics"] {
  position: relative;
}

.nav-link[href*="statistics"]:hover {
  color: #3b82f6;
}

.nav-link[href*="statistics"] .nav-icon {
  transition: transform 0.2s ease;
}

.nav-link[href*="statistics"]:hover .nav-icon {
  transform: scale(1.1);
}