/* Anchors & Algorithms - Modern Navigation Styles */

/* CSS Variables for Brand Colors */
:root {
  --primary-color: #14b8a6; /* Teal - matches existing brand */
  --primary-hover: #0d9488;
  --primary-light: #5eead4;
  --secondary-color: #1f2937; /* Dark gray */
  --background-dark: #0f172a; /* Deep navy */
  --background-light: #1e293b; /* Lighter navy */
  --text-primary: #f8fafc; /* Near white */
  --text-secondary: #cbd5e1; /* Light gray */
  --text-muted: #64748b; /* Medium gray */
  --border-color: #334155; /* Subtle border */
  --shadow-color: rgba(0, 0, 0, 0.3);
  --transition-speed: 0.3s;
  --border-radius: 8px;
  --max-width: 1200px;
}

/* Navigation Base Styles */
.main-navigation {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: rgba(15, 23, 42, 0.98);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--primary-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
  transition: all var(--transition-speed) ease;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

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

.brand-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
  transition: color var(--transition-speed) ease;
}

.brand-link:hover {
  color: var(--primary-color);
}

.brand-icon {
  font-size: 1.5rem;
  margin-right: 0.5rem;
  color: var(--primary-color);
}

.brand-text {
  white-space: nowrap;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  margin-left: auto;
}

.hamburger-line {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 3px 0;
  transition: all var(--transition-speed) ease;
  border-radius: 1px;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Navigation Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 1.5rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  transition: all var(--transition-speed) ease;
  position: relative;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--primary-color);
  outline: none;
}

.nav-link[aria-current="page"] {
  color: var(--primary-color);
}

/* Dropdown Styles */
.dropdown-toggle {
  padding-right: 1rem;
}

.dropdown-icon {
  transition: transform var(--transition-speed) ease;
}

.dropdown-toggle[aria-expanded="true"] .dropdown-icon {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--background-light);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: 0 10px 25px var(--shadow-color);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-speed) ease;
  z-index: 1001;
  list-style: none;
  margin: 0.5rem 0 0 0;
  padding: 0.5rem 0;
}

.dropdown-toggle[aria-expanded="true"] + .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-link {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  transition: all var(--transition-speed) ease;
  border-radius: 4px;
  margin: 0 0.5rem;
}

.dropdown-link:hover,
.dropdown-link:focus {
  color: var(--primary-color);
  background: rgba(20, 184, 166, 0.1);
  outline: none;
}

/* CTA Button */
.nav-cta {
  margin-left: 1rem;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary-color);
  color: white;
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-speed) ease;
  border: 2px solid transparent;
}

.cta-button:hover,
.cta-button:focus {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(20, 184, 166, 0.3);
  outline: none;
}

.cta-icon {
  transition: transform var(--transition-speed) ease;
}

.cta-button:hover .cta-icon {
  transform: translateX(2px);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-container {
    height: 60px;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--background-dark);
    border-top: 1px solid var(--border-color);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.5rem;
    gap: 0;
    transform: translateX(-100%);
    transition: transform var(--transition-speed) ease;
    max-height: calc(100vh - 60px);
    overflow-y: auto;
  }
  
  .nav-menu.active {
    transform: translateX(0);
  }
  
  .nav-list {
    flex-direction: column;
    width: 100%;
    gap: 0;
  }
  
  .nav-item {
    width: 100%;
    border-bottom: 1px solid var(--border-color);
  }
  
  .nav-link {
    width: 100%;
    padding: 1rem 0;
    font-size: 1rem;
  }
  
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: transparent;
    margin: 0;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-speed) ease;
  }
  
  .dropdown-toggle[aria-expanded="true"] + .dropdown-menu {
    max-height: 500px;
  }
  
  .dropdown-link {
    padding-left: 1.5rem;
    margin: 0;
    border-radius: 0;
  }
  
  .nav-cta {
    margin: 1.5rem 0 1rem 0;
    width: 100%;
  }
  
  .cta-button {
    width: 100%;
    justify-content: center;
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --border-color: #ffffff;
    --text-secondary: #ffffff;
  }
  
  .nav-link {
    border-bottom: 1px solid transparent;
  }
  
  .nav-link:hover,
  .nav-link:focus {
    border-bottom-color: var(--primary-color);
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus Indicators for Keyboard Navigation */
.nav-link:focus-visible,
.cta-button:focus-visible,
.dropdown-link:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Scroll behavior for navigation */
html {
  scroll-padding-top: 70px;
}

@media (max-width: 768px) {
  html {
    scroll-padding-top: 60px;
  }
}