/**
 * Samurai Labs - New Navigation System
 * Ultra-clean design with subtle scroll activation and premium mobile experience
 */

/* ================================================
   CSS Custom Properties
   ================================================ */
:root {
  /* Colors */
  --nav-bg: rgba(255, 255, 255, 0.98);
  --nav-bg-dark: rgba(255, 255, 255, 0.98);
  --nav-text: #111827;
  --nav-text-dark: #111827;
  --nav-link-hover: #3b82f6;
  --nav-border: rgba(15, 23, 42, 0.1);
  --nav-border-dark: rgba(15, 23, 42, 0.1);
  
  /* CTA Colors */
  --nav-cta-bg: linear-gradient(135deg, #10b981 0%, #3b82f6 50%, #8b5cf6 100%);
  --nav-cta-hover: linear-gradient(135deg, #059669 0%, #2563eb 50%, #7c3aed 100%);
  
  /* Spacing & Layout */
  --nav-height: 72px;
  --nav-padding: 1rem 1.5rem;
  --nav-gap: 2rem;
  --nav-mobile-width: 320px;
  
  /* Animation */
  --nav-transition: all 0.2s ease;
  --nav-mobile-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-Index */
  --nav-z-index: 1000;
  --nav-mobile-z-index: 1100;
  --nav-backdrop-z-index: 1050;
  
  /* Shadows */
  --nav-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  --nav-shadow-scrolled: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* Dark theme adjustments */
@media (prefers-color-scheme: dark) {
  :root {
    --nav-bg: rgba(255, 255, 255, 0.98);
    --nav-text: #111827;
    --nav-border: rgba(15, 23, 42, 0.1);
  }
}

/* ================================================
   Navigation Loading & FOUC Prevention
   ================================================ */
.samurai-nav {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

body.nav-loaded .samurai-nav {
  opacity: 1;
  visibility: visible;
}

/* Fallback for when JavaScript is disabled */
.samurai-nav:not([style*="opacity"]) {
  opacity: 1;
  visibility: visible;
}

/* ================================================
   Base Navigation Styles
   ================================================ */
.samurai-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--nav-border);
  z-index: var(--nav-z-index);
  transition: var(--nav-transition);
}

.samurai-nav.scrolled {
  box-shadow: var(--nav-shadow-scrolled);
}

.samurai-nav.dark-surface {
  --nav-bg: rgba(255, 255, 255, 0.98);
  --nav-text: #111827;
  --nav-border: rgba(15, 23, 42, 0.1);
}

.samurai-nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--nav-padding);
  gap: var(--nav-gap);
}

/* ================================================
   Logo Styles
   ================================================ */
.samurai-nav__logo {
  flex-shrink: 0;
}

.samurai-nav__logo-link {
  display: block;
  line-height: 0;
  transition: var(--nav-transition);
}

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

.samurai-nav__logo-link:focus-visible {
  outline: 2px solid var(--nav-link-hover);
  outline-offset: 4px;
  border-radius: 4px;
}

.samurai-nav__logo-img {
  height: 32px;
  width: auto;
}

/* ================================================
   Desktop Navigation
   ================================================ */
.samurai-nav__desktop {
  display: none;
  flex: 1;
  justify-content: center;
}

.samurai-nav__list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  justify-content: center;
}

.samurai-nav__item {
  position: relative;
  white-space: nowrap;
  min-width: 0;
}

.samurai-nav__link {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--nav-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: 8px;
  transition: var(--nav-transition);
  position: relative;
  white-space: nowrap;
  text-align: center;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Ensure specific navigation items don't wrap */
.samurai-nav__link[data-page="case-studies"] {
  white-space: nowrap;
  min-width: max-content;
}

.samurai-nav__link:hover {
  color: var(--nav-link-hover);
  background: rgba(59, 130, 246, 0.05);
}

.samurai-nav__link:focus-visible {
  outline: 2px solid var(--nav-link-hover);
  outline-offset: 2px;
}

.samurai-nav__link.active {
  color: var(--nav-link-hover);
  background: rgba(59, 130, 246, 0.1);
}

.samurai-nav__link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 1rem;
  right: 1rem;
  height: 2px;
  background: var(--nav-cta-bg);
  border-radius: 1px;
}

/* ================================================
   CTA Button
   ================================================ */
.samurai-nav__cta {
  flex-shrink: 0;
  display: none;
}

.samurai-nav__cta-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.5rem;
  background: var(--nav-cta-bg);
  color: white;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 50px;
  transition: var(--nav-transition);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.2);
}

.samurai-nav__cta-btn:hover {
  background: var(--nav-cta-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.samurai-nav__cta-btn:focus-visible {
  outline: 2px solid rgba(59, 130, 246, 0.5);
  outline-offset: 2px;
}

.samurai-nav__cta-text {
  position: relative;
  z-index: 1;
}

/* ================================================
   Mobile Menu Button
   ================================================ */
.samurai-nav__mobile-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: 8px;
  transition: var(--nav-transition);
}

.samurai-nav__mobile-btn:hover {
  background: rgba(15, 23, 42, 0.05);
}

.samurai-nav__mobile-btn:focus-visible {
  outline: 2px solid var(--nav-link-hover);
  outline-offset: 2px;
}

.samurai-nav__mobile-icon {
  display: flex;
  flex-direction: column;
  width: 20px;
  height: 16px;
  justify-content: space-between;
}

.samurai-nav__mobile-line {
  width: 100%;
  height: 2px;
  background: var(--nav-text);
  border-radius: 1px;
  transition: var(--nav-transition);
  transform-origin: center;
}

/* Mobile button animation when menu is open */
.samurai-nav__mobile-btn[aria-expanded="true"] .samurai-nav__mobile-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.samurai-nav__mobile-btn[aria-expanded="true"] .samurai-nav__mobile-line:nth-child(2) {
  opacity: 0;
}

.samurai-nav__mobile-btn[aria-expanded="true"] .samurai-nav__mobile-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ================================================
   Mobile Menu
   ================================================ */
.samurai-nav__mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--nav-mobile-width);
  height: 100vh;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-left: 1px solid var(--nav-border);
  z-index: var(--nav-mobile-z-index);
  transform: translateX(100%);
  transition: var(--nav-mobile-transition);
  overflow-y: auto;
}

.samurai-nav__mobile-menu.open {
  transform: translateX(0);
}

.samurai-nav__mobile-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.samurai-nav__mobile-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--nav-border);
}

.samurai-nav__mobile-title {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--nav-text);
}

.samurai-nav__mobile-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: 6px;
  transition: var(--nav-transition);
}

.samurai-nav__mobile-close:hover {
  background: rgba(15, 23, 42, 0.05);
}

.samurai-nav__close-icon {
  font-size: 1.5rem;
  color: var(--nav-text);
  line-height: 1;
}

.samurai-nav__mobile-list {
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
}

.samurai-nav__mobile-item {
  margin-bottom: 0.5rem;
}

.samurai-nav__mobile-link {
  display: block;
  padding: 1rem;
  color: var(--nav-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 1.1rem;
  border-radius: 12px;
  transition: var(--nav-transition);
}

.samurai-nav__mobile-link:hover {
  background: rgba(59, 130, 246, 0.05);
  color: var(--nav-link-hover);
}

.samurai-nav__mobile-link.active {
  background: rgba(59, 130, 246, 0.1);
  color: var(--nav-link-hover);
}

.samurai-nav__mobile-cta {
  margin-top: auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--nav-border);
}

.samurai-nav__mobile-cta-btn {
  display: block;
  width: 100%;
  padding: 1rem;
  background: var(--nav-cta-bg);
  color: white;
  text-decoration: none;
  font-weight: 600;
  text-align: center;
  border-radius: 12px;
  transition: var(--nav-transition);
}

.samurai-nav__mobile-cta-btn:hover {
  background: var(--nav-cta-hover);
  transform: translateY(-1px);
}

/* ================================================
   Mobile Menu Backdrop
   ================================================ */
.samurai-nav__backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--nav-backdrop-z-index);
  opacity: 0;
  visibility: hidden;
  transition: var(--nav-mobile-transition);
}

.samurai-nav__backdrop.open {
  opacity: 1;
  visibility: visible;
}

/* ================================================
   Responsive Design
   ================================================ */

/* Tablet and up */
@media (min-width: 768px) {
  .samurai-nav__mobile-menu {
    width: 400px;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .samurai-nav__desktop {
    display: flex;
  }
  
  .samurai-nav__cta {
    display: block;
  }
  
  .samurai-nav__mobile-btn {
    display: none;
  }
  
  /* Ensure balanced padding on desktop */
  .samurai-nav__container {
    padding: 1rem 2rem;
  }
}

/* Large desktop */
@media (min-width: 1200px) {
  :root {
    --nav-gap: 3rem;
  }
  
  .samurai-nav__container {
    padding: 1rem 2rem;
  }
}

/* Extra large desktop */
@media (min-width: 1400px) {
  .samurai-nav__container {
    padding: 1rem 3rem;
  }
}

/* ================================================
   Body Scroll Lock (when mobile menu is open)
   ================================================ */
body.nav-menu-open {
  overflow: hidden;
  height: 100vh;
}

/* ================================================
   Page Spacing (to prevent content overlap)
   ================================================ */
body {
  margin-top: var(--nav-height);
}

/* ================================================
   Animation Stagger for Mobile Menu Items
   ================================================ */
.samurai-nav__mobile-item {
  opacity: 0;
  transform: translateY(20px);
  transition: var(--nav-mobile-transition);
}

.samurai-nav__mobile-menu.open .samurai-nav__mobile-item {
  opacity: 1;
  transform: translateY(0);
}

.samurai-nav__mobile-menu.open .samurai-nav__mobile-item:nth-child(1) { transition-delay: 0.1s; }
.samurai-nav__mobile-menu.open .samurai-nav__mobile-item:nth-child(2) { transition-delay: 0.15s; }
.samurai-nav__mobile-menu.open .samurai-nav__mobile-item:nth-child(3) { transition-delay: 0.2s; }
.samurai-nav__mobile-menu.open .samurai-nav__mobile-item:nth-child(4) { transition-delay: 0.25s; }
.samurai-nav__mobile-menu.open .samurai-nav__mobile-item:nth-child(5) { transition-delay: 0.3s; }
.samurai-nav__mobile-item:nth-child(6) { transition-delay: 0.35s; }
.samurai-nav__mobile-item:nth-child(7) { transition-delay: 0.4s; }
.samurai-nav__mobile-item:nth-child(8) { transition-delay: 0.45s; }

/* ================================================
   Reduced Motion Preferences
   ================================================ */
@media (prefers-reduced-motion: reduce) {
  .samurai-nav,
  .samurai-nav__logo-link,
  .samurai-nav__link,
  .samurai-nav__cta-btn,
  .samurai-nav__mobile-btn,
  .samurai-nav__mobile-line,
  .samurai-nav__mobile-menu,
  .samurai-nav__backdrop,
  .samurai-nav__mobile-link,
  .samurai-nav__mobile-cta-btn,
  .samurai-nav__mobile-item {
    transition: none;
    animation: none;
  }
  
  .samurai-nav__mobile-item {
    opacity: 1;
    transform: none;
  }
  
  .samurai-nav__mobile-menu.open .samurai-nav__mobile-item {
    transition-delay: 0s;
  }
}

/* ================================================
   Focus Management
   ================================================ */
.samurai-nav__mobile-menu:not(.open) {
  visibility: hidden;
}

.samurai-nav__mobile-menu.open {
  visibility: visible;
}

/* ================================================
   High Contrast Mode Support
   ================================================ */
@media (prefers-contrast: high) {
  .samurai-nav {
    border-bottom-width: 2px;
  }
  
  .samurai-nav__link:focus-visible,
  .samurai-nav__cta-btn:focus-visible,
  .samurai-nav__mobile-btn:focus-visible {
    outline-width: 3px;
  }
}