/* === GLOBAL NAVIGATION === */

/* Navigation Base Styles */
.global-nav {
  position: relative;
  z-index: 10000;
}

/* Hamburger Button */
.hamburger-btn {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 9999;
  width: 48px;
  height: 48px;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.hamburger-line {
  width: 24px;
  height: 2px;
  background-color: currentColor;
  transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
  transform-origin: center;
}

.hamburger-btn:hover .hamburger-line {
  width: 30px;
}

.hamburger-btn:hover .hamburger-line:nth-child(1) {
  transform: translateX(-3px);
}

.hamburger-btn:hover .hamburger-line:nth-child(3) {
  transform: translateX(3px);
}

/* Overlay Styles */
.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.6s cubic-bezier(0.23, 1, 0.32, 1);
  pointer-events: none;
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
}

.nav-overlay-content {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem;
  position: relative;
}

/* Close Button */
.nav-close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 10001;
  width: 48px;
  height: 48px;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.nav-close-line {
  position: absolute;
  width: 24px;
  height: 2px;
  background-color: currentColor;
  transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.nav-close-line:nth-child(1) {
  transform: rotate(45deg);
}

.nav-close-line:nth-child(2) {
  transform: rotate(-45deg);
}

.nav-close-btn:hover .nav-close-line {
  width: 30px;
}

/* Navigation Links */
.nav-links {
  display: flex;
  flex-direction: column;
  gap: 3rem;
  text-align: center;
  overflow: visible;
}

.nav-link {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  position: relative;
  overflow: visible;
}

.nav-link-number {
  display: block;
  font-family: 'Courier New', 'Monaco', monospace;
  font-size: 1rem;
  font-weight: 700;
  opacity: 0.6;
  margin-bottom: 0.5rem;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

.nav-link-text {
  display: block;
  font-family: 'Anton', Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 900;
  line-height: 0.85;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

.nav-link-subtitle {
  display: block;
  font-family: 'Anybody', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 1.2rem;
  font-weight: 400;
  opacity: 0.8;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

/* Hover Effects */
.nav-link:hover .nav-link-number {
  opacity: 1;
  transform: translateY(-10px);
}

.nav-link:hover .nav-link-text {
  transform: translateY(-10px) scale(1.05);
}

.nav-link:hover .nav-link-subtitle {
  opacity: 1;
  transform: translateY(-10px);
}

/* Active Page Indicator */
.nav-link.active .nav-link-text {
  text-decoration: line-through;
  text-decoration-thickness: 3px;
}

/* Footer */
.nav-footer {
  position: absolute;
  bottom: 2rem;
  text-align: center;
}

.nav-footer-text {
  font-family: 'Courier New', 'Monaco', monospace;
  font-size: 1rem;
  opacity: 0.6;
  line-height: 1.4;
}

/* Page-specific colors */

/* Intro page (yellow accent) */
body[data-page="intro"] .nav-overlay {
  background: #FDC628;
  color: #0D0E0E;
}

body[data-page="intro"] .hamburger-btn {
  color: #0D0E0E;
}

/* Algorithm page (red accent) */
body[data-page="algorithm"] .nav-overlay {
  background: #EA4843;
  color: #FEFEFE;
}

body[data-page="algorithm"] .hamburger-btn {
  color: #0D0E0E;
}

/* Stoic Drama page (teal accent) */
body[data-page="stoic-drama"] .nav-overlay {
  background: #32929E;
  color: #FEFEFE;
}

body[data-page="stoic-drama"] .hamburger-btn {
  color: #FEFEFE;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
  .hamburger-btn,
  .nav-close-btn {
    width: 44px;
    height: 44px;
  }

  .hamburger-btn {
    position: absolute;
  }
  
  .nav-links {
    gap: 2rem;
  }
  
  .nav-link-text {
    font-size: clamp(2.5rem, 12vw, 4rem);
  }
  
  .nav-link-subtitle {
    font-size: 1rem;
  }
  
  .nav-overlay-content {
    padding: 1rem;
  }
}

/* Ultra-small screens */
@media (max-width: 480px) {
  .nav-links {
    gap: 1.5rem;
  }
  
  .nav-link-number {
    font-size: 0.9rem;
  }
  
  .nav-footer {
    bottom: 1rem;
  }
  
  .nav-footer-text {
    font-size: 0.9rem;
  }
}