/* Reset & Core Styling */
html {
  margin: 0;
  padding: 0;
  overflow-y: auto;
  
  /* Hide scrollbar completely to replace with vertical textual HUD menu */
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE/Edge */
}

html::-webkit-scrollbar {
  display: none; /* Chrome, Safari, Opera */
}

body {
  margin: 0;
  padding: 0;
  background-color: #0b0b0d;
  min-height: 100vh;
}

.snap-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  will-change: transform, scroll-position;
}

/* GPU-Accelerated Scroll Snapping ONLY on Desktop Viewports to prevent Mobile address-bar stutters */
@media (min-width: 1024px) {
  html {
    scroll-snap-type: y mandatory;
    height: 100%;
  }
  body {
    min-height: 100%;
  }
  .snap-section {
    scroll-snap-align: start;
    scroll-snap-stop: normal;
    padding-top: 72px; /* Prevent sticky header from covering content while keeping full viewport height */
  }
}

/* Custom Floating HUD Text Navigation (Scrollbar replacement) */
.hud-nav-container {
  padding-left: 16px;
  padding-right: 0px !important;
}

.nav-title-item {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  color: #71717a; /* zinc-400 */
  opacity: 1; /* Keep button visible to render the dots */
  pointer-events: auto; /* Allow hover/click anywhere on the button bounding box */
  outline: none;
  padding-top: 14px; /* Generous vertical padding to expand the click target area */
  padding-bottom: 14px; /* Generous vertical padding to expand the click target area */
  padding-right: 32px; /* Pad right directly on button to extend hitbox to screen edge */
  cursor: pointer;
}

/* Animate only the text span inside the HUD items */
.nav-title-item span {
  opacity: 0;
  transform: translateX(10px);
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), color 0.3s ease;
  
  /* Localized dark glow behind each line to prevent blending into page content */
  text-shadow: 
    0 0 10px #09090b,
    0 0 5px #09090b,
    0 0 2px #09090b;
}

/* Show text on hover or when expanded */
.hud-nav-container:hover .nav-title-item span,
.hud-nav-container.hud-nav-expanded .nav-title-item span {
  opacity: 0.6;
  transform: translateX(0);
  pointer-events: auto;
}

.hud-nav-container:hover .nav-title-item:hover span,
.hud-nav-container.hud-nav-expanded .nav-title-item:hover span {
  opacity: 1;
  color: #f4f4f5; /* zinc-100 */
}

.hud-nav-container:hover .nav-title-item.active-nav-title span,
.hud-nav-container.hud-nav-expanded .nav-title-item.active-nav-title span {
  opacity: 1;
  color: #3b82f6; /* brand-blue */
  font-weight: 600;
  
  /* Glowing blue text on a dark protective shadow background */
  text-shadow: 
    0 0 10px rgba(59, 130, 246, 0.6),
    0 0 5px rgba(59, 130, 246, 0.4),
    0 0 8px #09090b,
    0 0 4px #09090b;
}

/* --- Morphing HUD Scrollbar & Dot Navigation --- */

/* Default state: Collapsed (Continuous bar & active capsule segment) */
.nav-title-item::after {
  content: '';
  position: absolute;
  right: 19px; /* Align precisely with the scroll line position */
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 100%; /* Stretch to fill the parent height, forming a continuous line without gaps */
  border-radius: 0px;
  background-color: rgba(63, 63, 70, 0.2);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
  z-index: 1;
}

/* Active segment in collapsed state */
.nav-title-item.active-nav-title::after {
  width: 4px;
  height: 100%;
  background-color: #3b82f6; /* brand-blue */
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.6);
  border-radius: 99px;
  z-index: 2;
  right: 18px;
}

/* --- Expanded HUD State (Hovered or Expanded class) --- */

/* Morph lines back into separate individual dots */
.hud-nav-container:hover .nav-title-item::after,
.hud-nav-container.hud-nav-expanded .nav-title-item::after {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: #3f3f46; /* zinc-700 */
  box-shadow: none;
  right: 13px; /* Revert to standard alignment */
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

/* Hovering items in expanded state increases brightness */
.hud-nav-container:hover .nav-title-item:hover::after {
  background-color: #f4f4f5; /* zinc-100 */
}

/* Active dot/capsule in expanded state */
.hud-nav-container:hover .nav-title-item.active-nav-title::after,
.hud-nav-container.hud-nav-expanded .nav-title-item.active-nav-title::after {
  width: 5px;
  height: 12px;
  border-radius: 2px;
  background-color: #3b82f6; /* brand-blue */
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.6);
  right: 13px;
  top: 50%;
  transform: translateY(-50%);
}

/* Premium visual effects */
.glow-bg {
  background: radial-gradient(circle 800px at 50% -100px, rgba(59, 130, 246, 0.08), transparent 80%);
}
.glow-btn:hover {
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.35);
}

/* Scrollbar styling for code terminal & containment of scroll events to prevent page snapping */
.terminal-scroll {
  overscroll-behavior: contain;
}
.terminal-scroll::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
.terminal-scroll::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
}
.terminal-scroll::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}
.terminal-scroll::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Custom range slider styling */
#custom-slider-track {
  background: #18181b; /* zinc-900 */
  border: 1px solid #27272a; /* zinc-800 */
}
#custom-slider-handle {
  transform: translate(-50%, -50%);
  transform-origin: center center;
  transition: transform 0.15s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.3s ease, box-shadow 0.3s ease;
}
#custom-slider-handle:hover {
  transform: translate(-50%, -50%) scale(1.2);
}
#custom-slider-handle:active {
  transform: translate(-50%, -50%) scale(1.1);
  cursor: grabbing;
}

/* Active Keyboard key glow effect */
.key-active-glow {
  background-color: rgba(168, 85, 247, 0.15) !important;
  border-color: #a855f7 !important;
  color: #c084fc !important;
  box-shadow: 0 0 15px rgba(168, 85, 247, 0.3) !important;
  transform: scale(1.05);
}

/* Interactive UI Sandbox Styles */
#mock-browser-canvas [data-hs-component] {
  position: relative;
  transition: background-color 0.20s ease, border-color 0.20s ease;
}

/* In Cursor Tracking Mode, show a subtle border around hovered element */
.hs-cursor-track-hover {
  outline: 1px dashed rgba(59, 130, 246, 0.5);
  background-color: rgba(59, 130, 246, 0.03);
}

/* Interactive Hover Border Highlight for scrollable mock containers */
#mock-browser-canvas,
#mock-terminal-container {
  transition: border-color 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

#mock-browser-canvas:hover,
#mock-terminal-container:hover {
  border-color: rgba(59, 130, 246, 0.4) !important; /* Brand blue border glow */
  box-shadow: 0 0 25px rgba(59, 130, 246, 0.06), 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* Hover onboarding hint fade out */
.hud-hover-hint {
  transition: opacity 0.4s ease, transform 0.4s ease, visibility 0.4s ease;
}

#mock-browser-canvas:hover ~ .hud-hover-hint {
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px) rotate(5deg);
}

/* Compact Spec Card layout on Mobile/Tablet viewports */
@media (max-width: 1023px) {
  #hoversource-spec-card {
    padding: 10px !important;
    font-size: 9px !important;
    line-height: 1.25 !important;
    max-width: 320px !important; /* Prevent spec card from becoming overly wide */
  }

  /* Hide secondary sections (Parent Styles, Stack, Shortcut Hint) to keep it compact */
  #hoversource-spec-card .spec-mobile-hide {
    display: none !important;
  }
}

/* CLI Ticker Mask Fade Effect */
.cli-mask-fade {
  mask-image: linear-gradient(to bottom, transparent 0%, #000 30%, #000 70%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, #000 30%, #000 70%, transparent 100%);
}