/* ==========================================================================
   COMPONENT: NAVIGATION & FULLSCREEN MOBILE MENU
   Portfolio: Aylin Aslı Altınkılıç
   Framework: Antigravity Modular HTML/CSS Architecture
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. DESKTOP NAVIGATION
   -------------------------------------------------------------------------- */
.site-nav {
  justify-self: center;
}

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

.site-nav__link {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  padding: 0.35rem 0.5rem;
  position: relative;
  text-decoration: none;
  transition: color var(--transition-snappy);
  letter-spacing: var(--letter-spacing-wide);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
}

.site-nav__bracket {
  color: var(--color-text-muted);
  transition: color var(--transition-snappy);
  margin-inline: 0.1em;
}

/* Desktop Hover State */
.site-nav__link:hover {
  color: var(--color-text-primary);
}

.site-nav__link:hover .site-nav__bracket {
  color: var(--color-accent-purple);
}

/* Desktop Active / Selected State */
.site-nav__link--active {
  color: var(--color-accent-purple);
}

.site-nav__link--active .site-nav__bracket {
  color: var(--color-accent-pink);
}

/* --------------------------------------------------------------------------
   2. TACTILE HAMBURGER TOGGLE BUTTON
   -------------------------------------------------------------------------- */
.hamburger-btn {
  display: none; /* Hidden on desktop */
  align-items: center;
  gap: 0.45rem;
  background-color: var(--color-bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--color-text-primary);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  letter-spacing: var(--letter-spacing-mono);
  padding: 0.45rem 0.75rem;
  border-radius: 2px;
  cursor: pointer;
  box-shadow: 2px 2px 0px rgba(0, 0, 0, 0.6);
  transition: var(--transition-snappy);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  z-index: var(--z-sticky);
}

.hamburger-btn:hover {
  border-color: var(--color-accent-purple);
  box-shadow: 3px 3px 0px var(--color-accent-purple-dark);
  color: var(--color-text-primary);
}

.hamburger-btn:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0px transparent;
}

.hamburger-btn:focus-visible {
  outline: 2px solid var(--color-accent-pink);
  outline-offset: 2px;
}

.hamburger-btn__bracket {
  color: var(--color-accent-pink);
  font-weight: var(--weight-bold);
  transition: color var(--transition-snappy);
}

.hamburger-btn__icon {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 16px;
  height: 12px;
  position: relative;
}

.hamburger-btn__line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: 1px;
  transition: transform var(--transition-snappy), opacity var(--transition-snappy), background-color var(--transition-snappy);
  transform-origin: center;
}

.hamburger-btn__label {
  font-size: var(--font-size-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--letter-spacing-mono);
}

/* Hamburger Active / Open Morph State */
.hamburger-btn.is-active {
  border-color: var(--color-accent-pink);
  box-shadow: 3px 3px 0px var(--color-accent-pink-dark);
}

.hamburger-btn.is-active .hamburger-btn__line--top {
  transform: translateY(5px) rotate(45deg);
  background-color: var(--color-accent-pink);
}

.hamburger-btn.is-active .hamburger-btn__line--mid {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger-btn.is-active .hamburger-btn__line--bot {
  transform: translateY(-5px) rotate(-45deg);
  background-color: var(--color-accent-pink);
}

.hamburger-btn.is-active .hamburger-btn__bracket {
  color: var(--color-accent-purple);
}

/* --------------------------------------------------------------------------
   3. FULLSCREEN MOBILE NAVIGATION OVERLAY
   -------------------------------------------------------------------------- */
.mobile-nav {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  z-index: var(--z-modal);
  background-color: rgba(9, 9, 11, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  
  /* Initial hidden state */
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-10px);
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.25s cubic-bezier(0.16, 1, 0.3, 1),
              visibility 0.25s;
}

/* Cyber Blueprint Grid Background Overlay */
.mobile-nav::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(circle at 50% 40%, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.3) 100%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, rgba(0, 0, 0, 1) 0%, rgba(0, 0, 0, 0.3) 100%);
}

/* Ambient Cyber Glow Accents */
.mobile-nav::after {
  content: "";
  position: absolute;
  top: -150px;
  right: -100px;
  width: 400px;
  height: 400px;
  pointer-events: none;
  background: radial-gradient(circle, var(--color-accent-purple-glow) 0%, transparent 70%);
  filter: blur(70px);
  opacity: 0.5;
}

/* Open State */
.mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

/* Container Structure inside Fullscreen Menu */
.mobile-nav__overlay {
  position: relative;
  z-index: var(--z-base);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--space-md) var(--container-padding);
  box-sizing: border-box;
}

/* Topbar row inside fullscreen menu */
.mobile-nav__topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Close Button */
.mobile-nav__close-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--color-bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-text-primary);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  letter-spacing: var(--letter-spacing-mono);
  padding: 0.45rem 0.75rem;
  border-radius: 2px;
  cursor: pointer;
  box-shadow: 2px 2px 0px rgba(0, 0, 0, 0.6);
  transition: var(--transition-snappy);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.mobile-nav__close-btn:hover {
  border-color: var(--color-accent-pink);
  box-shadow: 3px 3px 0px var(--color-accent-pink-dark);
  color: var(--color-accent-pink);
}

.mobile-nav__close-btn:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0px transparent;
}

.mobile-nav__close-btn:focus-visible {
  outline: 2px solid var(--color-accent-pink);
  outline-offset: 2px;
}

.mobile-nav__close-bracket {
  color: var(--color-accent-pink);
  font-weight: var(--weight-bold);
}

.mobile-nav__close-icon {
  font-size: 1.1rem;
  line-height: 1;
}

/* Main Content Area */
.mobile-nav__content {
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-xl);
  padding-block: var(--space-xl);
}

.mobile-nav__section-header {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-xs);
}

.mobile-nav__section-tag {
  font-family: var(--font-mono);
  font-size: var(--font-size-2xs);
  letter-spacing: var(--letter-spacing-mono);
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.mobile-nav__section-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.15), transparent);
}

/* Navigation List */
.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 5vw, 1.6rem);
  font-weight: var(--weight-bold);
  letter-spacing: var(--letter-spacing-mono);
  color: var(--color-text-secondary);
  padding: 0.85rem 1rem;
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  background-color: rgba(24, 24, 27, 0.5);
  text-decoration: none;
  transition: all var(--transition-snappy);
  position: relative;
  box-shadow: 2px 2px 0px rgba(0, 0, 0, 0.4);
  -webkit-tap-highlight-color: transparent;
}

.mobile-nav__link-bracket {
  color: var(--color-text-muted);
  transition: color var(--transition-snappy);
  font-weight: var(--weight-bold);
}

.mobile-nav__link-code {
  color: var(--color-accent-purple);
  font-size: 0.85em;
  opacity: 0.85;
  transition: color var(--transition-snappy), opacity var(--transition-snappy);
}

.mobile-nav__link-title {
  color: inherit;
  transition: color var(--transition-snappy);
}

.mobile-nav__arrow {
  margin-left: auto;
  font-size: 1.25rem;
  color: var(--color-text-muted);
  opacity: 0;
  transform: translateX(-6px);
  transition: all var(--transition-snappy);
}

/* Hover State in Mobile Menu */
.mobile-nav__link:hover {
  color: var(--color-text-primary);
  background-color: rgba(255, 255, 255, 0.05);
  border-color: rgba(167, 139, 250, 0.4);
}

.mobile-nav__link:hover .mobile-nav__link-bracket {
  color: var(--color-accent-purple);
}

.mobile-nav__link:hover .mobile-nav__arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--color-accent-purple);
}

/* ==========================================================================
   SELECTED / ACTIVE STATE (Mirrors Desktop Breakpoint Colors)
   Desktop: .site-nav__link--active has purple text (#A78BFA) & pink brackets (#F472B6)
   ========================================================================== */
.mobile-nav__link.site-nav__link--active {
  color: var(--color-accent-purple);
  background-color: rgba(167, 139, 250, 0.12);
  border-color: var(--color-accent-purple);
  box-shadow: 4px 4px 0px var(--color-accent-purple-dark);
}

.mobile-nav__link.site-nav__link--active .mobile-nav__link-bracket {
  color: var(--color-accent-pink);
}

.mobile-nav__link.site-nav__link--active .mobile-nav__link-code {
  color: var(--color-accent-pink);
  opacity: 1;
}

.mobile-nav__link.site-nav__link--active .mobile-nav__arrow {
  opacity: 1;
  transform: translateX(2px);
  color: var(--color-accent-pink);
}

.mobile-nav__link:focus-visible {
  outline: 2px solid var(--color-accent-pink);
  outline-offset: 3px;
}

/* Action Buttons Slot in Mobile Menu */
.mobile-nav__actions-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.mobile-nav__actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

@media (max-width: 400px) {
  .mobile-nav__actions {
    grid-template-columns: 1fr;
  }
}

.mobile-nav__action-btn {
  width: 100%;
  justify-content: center;
  padding-block: 0.75rem;
  font-size: var(--font-size-xs);
}

/* Footer Telemetry inside Mobile Menu */
.mobile-nav__footer {
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.mobile-nav__protocol {
  font-family: var(--font-mono);
  font-size: var(--font-size-2xs);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
}

/* --------------------------------------------------------------------------
   4. RESPONSIVE BREAKPOINT RULES
   -------------------------------------------------------------------------- */
/* Mobile Breakpoint: <= 768px */
@media (max-width: 768px) {
  .site-header__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  /* Hide desktop navigation items and actions on mobile navbar */
  .site-header .site-nav {
    display: none !important;
  }

  .site-header .site-header__actions {
    display: none !important;
  }

  /* Show tactile hamburger button on mobile navbar */
  .hamburger-btn {
    display: inline-flex !important;
  }
}

/* Desktop Breakpoint: >= 769px */
@media (min-width: 769px) {
  .hamburger-btn {
    display: none !important;
  }

  .mobile-nav {
    display: none !important;
  }
}