/* ==========================================================================
   TzdLang Official Website — Apple Developer & Vercel Design System (v2.0)
   Strictly engineered from scratch: Zero AI templates, authentic Liquid Glassmorphism.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens & CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
  --bg-base: #090A0F;
  --bg-panel: rgba(18, 20, 29, 0.6);
  --bg-panel-hover: rgba(255, 255, 255, 0.04);
  --bg-glass-card: rgba(255, 255, 255, 0.025);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glass: rgba(255, 255, 255, 0.10);
  --border-active: rgba(255, 255, 255, 0.15);
  --border-highlight: rgba(56, 189, 248, 0.35);

  --text-primary: #F5F5F7;
  --text-secondary: #86868B;
  --text-tertiary: #52525A;
  --text-accent: #38BDF8;
  --text-accent-glow: #00F2FE;

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, Monaco, monospace;

  --nav-height: 60px;
  --workbench-sidebar-w: 240px;
}

/* --------------------------------------------------------------------------
   2. Reset & Global Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

body {
  background-color: var(--bg-base);
  min-height: 100vh;
  position: relative;
  overflow-x: clip;
  width: 100%;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Lenis Physics Momentum Smooth Scrolling
   -------------------------------------------------------------------------- */
html.lenis, html.lenis body {
  height: auto;
}

.lenis.lenis-smooth {
  scroll-behavior: auto !important;
}

.lenis.lenis-smooth [data-lenis-prevent] {
  overscroll-behavior: contain;
}

.lenis.lenis-stopped {
  overflow: hidden;
}

.lenis.lenis-smooth iframe {
  pointer-events: none;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease, opacity 0.15s ease;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

/* --------------------------------------------------------------------------
   3. Ambient Depth Lights (Strictly 2 Low-Saturation Deep Glows)
   -------------------------------------------------------------------------- */
.ambient-glow-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-light-teal {
  position: absolute;
  top: -100px;
  right: -80px;
  width: 720px;
  height: 680px;
  background: radial-gradient(circle, #0F2A38 0%, rgba(15, 42, 56, 0) 70%);
  filter: blur(140px);
  opacity: 0.55;
}

.ambient-light-indigo {
  position: absolute;
  top: 45%;
  left: -120px;
  width: 760px;
  height: 720px;
  background: radial-gradient(circle, #1E1035 0%, rgba(30, 16, 53, 0) 70%);
  filter: blur(140px);
  opacity: 0.45;
}

/* --------------------------------------------------------------------------
   4. Top Fixed Navigation (Integrated Glassmorphism Header)
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(9, 10, 15, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.header-container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.brand-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: linear-gradient(135deg, #1E293B, #0F172A);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.brand-icon svg {
  width: 16px;
  height: 16px;
  color: #38BDF8;
}

.brand-name {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.version-badge {
  font-size: 0.68rem;
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  padding: 0.15rem 0.45rem;
  border-radius: 9999px;
  letter-spacing: 0.02em;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.85rem;
  font-weight: 450;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-primary-header {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: #000000;
  background: #ffffff;
  padding: 0.42rem 0.95rem;
  border-radius: 8px;
  text-decoration: none;
  transition: background-color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
}

.btn-primary-header:hover {
  background: #f5f5f7;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(255, 255, 255, 0.25);
}

.btn-github {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  padding: 0.42rem 0.85rem;
  border-radius: 9999px;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}

.btn-github:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.btn-github svg {
  width: 14px;
  height: 14px;
}

.mobile-menu-btn {
  display: none;
  padding: 0.4rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   5. Hero Section (Apple Keynote & Vercel Developer Style)
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  z-index: 10;
  padding-top: calc(var(--nav-height) + 5rem);
  padding-bottom: 4rem;
  text-align: center;
}

.hero-container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero-pill-announcement {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: 9999px;
  padding: 0.3rem 0.85rem;
  margin-bottom: 1.75rem;
  font-size: 0.78rem;
  color: var(--text-secondary);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.hero-pill-announcement .indicator-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #38BDF8;
  box-shadow: 0 0 8px #38BDF8;
}

.hero-title {
  font-size: clamp(2.3rem, 5.5vw, 3.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.hero-title .text-gradient {
  background: linear-gradient(180deg, #FFFFFF 0%, rgba(255, 255, 255, 0.65) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: clamp(1rem, 2vw, 1.15rem);
  font-weight: 400;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 2.25rem auto;
  line-height: 1.65;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: #090A0F;
  background: #FFFFFF;
  padding: 0.65rem 1.4rem;
  border-radius: 9999px;
  transition: background 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 14px rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  background: #E2E8F0;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255, 255, 255, 0.25);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  padding: 0.65rem 1.4rem;
  border-radius: 9999px;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

/* Hero Metric Stats Grid */
.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  max-width: 900px;
  margin: 0 auto;
}

.stat-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1.15rem 1rem;
  text-align: left;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.stat-card:hover {
  border-color: var(--border-glass);
  transform: translateY(-2px);
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.stat-value span {
  color: #38BDF8;
  font-size: 1rem;
}

.stat-label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   6. Core Syntax Workbench (Xcode Desktop App Interface)
   -------------------------------------------------------------------------- */
.workbench-section {
  position: relative;
  z-index: 10;
  padding: 3rem 1.5rem 6rem;
  scroll-margin-top: calc(var(--nav-height) + 1.5rem);
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header-compact {
  text-align: center;
  margin-bottom: 2.25rem;
}

.section-badge-tiny {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #38BDF8;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  background: linear-gradient(180deg, #FFFFFF 0%, rgba(255, 255, 255, 0.7) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.65rem;
}

.section-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto;
}

/* Xcode Window Outer Shell */
.xcode-window {
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: var(--bg-panel);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Window Titlebar (macOS standard) */
.xcode-titlebar {
  height: 44px;
  background: rgba(14, 16, 23, 0.75);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
}

.traffic-lights {
  display: flex;
  align-items: center;
  gap: 7px;
  width: 60px;
}

.traffic-light {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.traffic-light.red { background-color: #FF5F56; }
.traffic-light.yellow { background-color: #FFBD2E; }
.traffic-light.green { background-color: #27C93F; }

.window-active-filename {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  padding: 0.2rem 0.65rem;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.window-active-filename svg {
  width: 12px;
  height: 12px;
  color: #38BDF8;
}

.titlebar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 80px;
  justify-content: flex-end;
}

.btn-copy-code {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  padding: 0.25rem 0.55rem;
  border-radius: 6px;
  transition: all 0.15s ease;
}

.btn-copy-code:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-glass);
}

.btn-copy-code svg {
  width: 12px;
  height: 12px;
}

/* Xcode Window Body Split (Sidebar + Editor) */
.xcode-body {
  display: flex;
  min-height: 540px;
}

/* Left Navigator Sidebar (width 240px) */
.xcode-navigator {
  width: var(--workbench-sidebar-w);
  flex-shrink: 0;
  background: rgba(12, 14, 20, 0.5);
  border-right: 1px solid var(--border-subtle);
  padding: 0.85rem 0.65rem;
  display: flex;
  flex-direction: column;
}

.navigator-group-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  padding: 0 0.5rem 0.5rem;
}

.navigator-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  list-style: none;
}

.nav-item-btn {
  width: 100%;
  height: 36px;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0 0.65rem;
  border-radius: 6px;
  font-size: 13px;
  font-family: var(--font-sans);
  color: var(--text-secondary);
  text-align: left;
  position: relative;
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-item-btn:hover {
  color: var(--text-primary);
  background: var(--bg-panel-hover);
}

.nav-item-btn svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  opacity: 0.7;
}

.nav-item-btn.active {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #FFFFFF;
}

.nav-item-btn.active svg {
  opacity: 1;
  color: #38BDF8;
}

/* 2px Bright Blue Vertical Indicator Bar */
.nav-item-btn.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 2px;
  border-radius: 2px;
  background-color: #38BDF8;
  box-shadow: 0 0 6px rgba(56, 189, 248, 0.8);
}

/* Right Editor Viewport */
.xcode-editor-viewport {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: rgba(14, 16, 24, 0.4);
}

/* Editor Top Spec Summary */
.editor-doc-header {
  padding: 1.25rem 1.75rem 0.85rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.editor-doc-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.editor-doc-tag {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  padding: 0.15rem 0.45rem;
  background: rgba(56, 189, 248, 0.12);
  color: #38BDF8;
  border-radius: 4px;
  border: 1px solid rgba(56, 189, 248, 0.25);
}

.editor-doc-desc {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.editor-doc-rule {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: #94A3B8;
  background: rgba(255, 255, 255, 0.03);
  border-left: 2px solid #38BDF8;
  padding: 0.35rem 0.65rem;
  border-radius: 0 4px 4px 0;
}

/* Code Container (Line Numbers + Highlighting) */
.code-container {
  flex: 1;
  display: flex;
  overflow: auto;
  position: relative;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
}

.code-container::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

.code-container::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}

.code-container::-webkit-scrollbar-track {
  background: transparent;
}

.line-numbers-col {
  padding: 1.25rem 0.75rem 1.25rem 1rem;
  text-align: right;
  user-select: none;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-tertiary);
  min-width: 44px;
  border-right: 1px solid rgba(255, 255, 255, 0.04);
}

.code-pane-wrapper {
  flex: 1;
  min-width: 0;
  position: relative;
}

.code-pane {
  padding: 1.25rem 1.25rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.75;
  white-space: pre;
  color: #C9D1D9;
  opacity: 1;
  transition: opacity 0.2s cubic-bezier(0.16, 1, 0.3, 1), transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.code-pane.fade-out {
  opacity: 0;
  transform: translateY(4px);
}

/* Xcode Dark / GitHub Dark Muted Color Scheme */
.tzd-keyword   { color: #FF7AB2; font-weight: 500; } /* Soft Rose / Violet */
.tzd-type      { color: #79C0FF; }                   /* Sky Blue */
.tzd-string    { color: #7EE787; }                   /* Mint Green */
.tzd-number    { color: #E3B341; }                   /* Warm Amber */
.tzd-comment   { color: #8B949E; font-style: italic; } /* Neutral Muted Gray */
.tzd-fun       { color: #79C0FF; font-weight: 500; } /* Function Name */
.tzd-class     { color: #D2A8FF; font-weight: 500; } /* Pastel Lavender */
.tzd-annot     { color: #FFA657; }                   /* Orange Metadata */

/* --------------------------------------------------------------------------
   7. Architecture & Pipeline Section
   -------------------------------------------------------------------------- */
.arch-section {
  position: relative;
  z-index: 10;
  padding: 4rem 1.5rem 6rem;
  scroll-margin-top: calc(var(--nav-height) + 1.5rem);
}

.pipeline-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 2rem;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.5);
  margin-bottom: 2rem;
}

.pipeline-flow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

.pipeline-stage {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 1.25rem 1rem;
  position: relative;
}

.stage-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: #38BDF8;
  margin-bottom: 0.4rem;
}

.stage-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.stage-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.arch-duo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.feature-box {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 1.5rem;
}

.feature-box-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.feature-box-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   8. Benchmarks Section (Clean Apple Glass Table)
   -------------------------------------------------------------------------- */
.benchmarks-section {
  position: relative;
  z-index: 10;
  padding: 2rem 1.5rem 6rem;
  scroll-margin-top: calc(var(--nav-height) + 1.5rem);
}

.table-glass-wrapper {
  background: var(--bg-panel);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.6);
}

.apple-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.apple-table th {
  background: rgba(14, 16, 23, 0.7);
  padding: 0.95rem 1.25rem;
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.apple-table td {
  padding: 1rem 1.25rem;
  font-size: 0.86rem;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.apple-table tr:last-child td {
  border-bottom: none;
}

.apple-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.cell-highlight {
  color: #38BDF8;
  font-weight: 600;
  font-family: var(--font-mono);
}

.cell-ratio {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: #34D399;
  background: rgba(52, 211, 153, 0.1);
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  display: inline-block;
}

/* --------------------------------------------------------------------------
   9. Toolchain & Quickstart Terminal
   -------------------------------------------------------------------------- */
.toolchain-section {
  position: relative;
  z-index: 10;
  padding: 2rem 1.5rem 6rem;
  scroll-margin-top: calc(var(--nav-height) + 1.5rem);
}

.terminal-window {
  background: rgba(10, 12, 18, 0.85);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.7);
}

.terminal-titlebar {
  height: 38px;
  background: rgba(18, 20, 28, 0.8);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  padding: 0 1rem;
}

.terminal-body {
  padding: 1.25rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  color: #94A3B8;
}

.cmd-line {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.5rem;
}

.cmd-prompt {
  color: #38BDF8;
  user-select: none;
}

.cmd-text {
  color: #F8FAFC;
}

/* --------------------------------------------------------------------------
   10. Site Footer
   -------------------------------------------------------------------------- */
.site-footer {
  position: relative;
  z-index: 10;
  border-top: 1px solid var(--border-subtle);
  padding: 3rem 1.5rem 4rem;
  background: rgba(7, 8, 12, 0.9);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   11. Mobile & Tablet Responsiveness
   -------------------------------------------------------------------------- */
@media (max-width: 860px) {
  .header-nav {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  .mobile-nav-drawer {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(9, 10, 15, 0.95);
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    border-bottom: 1px solid var(--border-subtle);
    padding: 1.25rem 1.5rem;
    flex-direction: column;
    gap: 1rem;
    z-index: 999;
  }

  .mobile-nav-drawer.open {
    display: flex;
  }

  .hero-stats-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .pipeline-flow-grid {
    grid-template-columns: 1fr;
  }

  .arch-duo-grid {
    grid-template-columns: 1fr;
  }

  /* Workbench on Mobile: Horizontal Scrollable Segmented Track */
  .xcode-body {
    flex-direction: column;
  }

  .xcode-navigator {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
    padding: 0.5rem 0.75rem;
  }

  .navigator-group-label {
    display: none;
  }

  .navigator-list {
    flex-direction: row;
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    gap: 0.4rem;
    padding-bottom: 0.25rem;
  }

  .navigator-list::-webkit-scrollbar {
    display: none;
  }

  .nav-item-btn {
    flex: 0 0 auto;
    width: auto;
    padding: 0 0.85rem;
    border-radius: 9999px;
  }

  .nav-item-btn.active::before {
    display: none;
  }

  .nav-item-btn.active {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  }

  .table-glass-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .apple-table {
    min-width: 480px;
  }
}

@media (max-width: 480px) {
  .hero-stats-row {
    grid-template-columns: 1fr;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .footer-container {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* --------------------------------------------------------------------------
   8. Modern Effects: Canvas Background, Spotlight, Badges & Animations
   -------------------------------------------------------------------------- */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

.pulse-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.6);
  animation: pulse-glow 2.5s infinite;
  margin-right: 6px;
  vertical-align: middle;
}

@keyframes pulse-glow {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.5); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(255, 255, 255, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); }
}

/* --------------------------------------------------------------------------
   9. Dedicated Downloads Center Section (Apple Scroll-Driven Pinning 300vh Runway)
   -------------------------------------------------------------------------- */
.pin-download-runway {
  position: relative;
  height: 300vh;
  background-color: #080808;
  z-index: 20;
  overflow-x: clip;
}

.pin-viewport-stage {
  position: sticky;
  top: 0;
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
  padding: 1.5rem;
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
}

.stage-container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 10;
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
}

.pin-stage-header {
  text-align: center;
  margin-bottom: 2rem;
  will-change: transform, opacity;
  transform-origin: center center;
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.download-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.95rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 9999px;
  font-size: 0.78rem;
  color: #a1a1a6;
  font-weight: 500;
  margin-bottom: 0.85rem;
}

/* 3D Perspective Container (Apple Mac Pro / iPhone Keynote stage) */
.cards-perspective-container {
  perspective: 1000px;
  -webkit-perspective: 1000px;
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  will-change: transform, opacity;
  width: 100%;
  position: relative;
}

.download-cards-grid, .cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  width: 100%;
  position: relative;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

/* Motion Wrappers: controlled purely by GSAP ScrollTrigger timeline */
.card-motion-wrapper {
  will-change: transform, opacity, filter;
  position: relative;
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

.card-motion-wrapper.featured-wrapper {
  z-index: 5;
}

/* Inner Card: receives 3D mouse tilt & visual glass styling */
.card-tilt-inner, .dl-card {
  position: relative;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 2.35rem 2rem 2.15rem 2rem;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
  perspective: 1000px;
  -webkit-perspective: 1000px;
  will-change: transform, opacity;
  box-shadow: 0 16px 40px -15px rgba(0, 0, 0, 0.6);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.card-tilt-inner:hover, .dl-card:hover {
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: 0 24px 60px -15px rgba(0, 0, 0, 0.75), 0 0 1px 1px rgba(255, 255, 255, 0.1);
}

.dl-card-featured {
  background: rgba(255, 255, 255, 0.045);
  border-color: rgba(255, 255, 255, 0.12);
}

/* Pointer-events-none Cold-White Spotlight Shine Layer */
.card-spotlight-shine {
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1;
}

/* Neutral Gray Capsule Badge */
.dl-badge-neutral {
  align-self: flex-start;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: #a1a1a6;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 4px 11px;
  border-radius: 9999px;
  margin-bottom: 1.25rem;
  position: relative;
  z-index: 2;
}

/* Minimal Vector Icon */
.dl-icon-minimal {
  width: 36px;
  height: 36px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  position: relative;
  z-index: 2;
}

.dl-icon-minimal svg {
  width: 26px;
  height: 26px;
  stroke-width: 1.5px;
}

.dl-title-wrap {
  margin-bottom: 0.4rem;
  position: relative;
  z-index: 2;
}

.dl-card-title {
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #f5f5f7;
  line-height: 1.25;
  margin-bottom: 0.25rem;
}

.dl-card-subtitle {
  font-size: 0.82rem;
  color: #86868b;
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.dl-meta-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.35rem;
  padding-bottom: 1.15rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  position: relative;
  z-index: 2;
}

.dl-file-size {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.dl-file-badge {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  color: #86868b;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.dl-feature-list {
  list-style: none;
  margin-bottom: 1.85rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  position: relative;
  z-index: 2;
}

.dl-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.83rem;
  color: #9aa1b0;
  line-height: 1.55;
}

.dl-feature-item svg {
  color: #636b7b;
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.dl-feature-item strong {
  color: #e5e5e7;
  font-weight: 500;
}

/* Action Buttons (Primary High-Contrast White & Secondary Ghost) */
.dl-btn {
  width: 100%;
  padding: 0.8rem 1.4rem;
  border-radius: 9999px;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  position: relative;
  z-index: 2;
  transition: background-color 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

/* Magnetic Button Wrapper */
.magnetic-btn {
  position: relative;
  will-change: transform;
}

.dl-btn-white {
  background: #EDEDED;
  color: #000000;
  border: 1px solid #EDEDED;
  box-shadow: 0 2px 8px rgba(255, 255, 255, 0.15);
}

.dl-btn-white:hover {
  background: #FFFFFF;
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.35);
}

.dl-btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  color: #EDEDED;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.dl-btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.28);
}

.dl-hint-row {
  margin-top: 0.75rem;
  text-align: center;
  font-size: 0.73rem;
  color: #636b7b;
  position: relative;
  z-index: 2;
}

/* Quick Installation Command Strip */
.install-cmd-strip {
  margin-top: 2.5rem;
  background: rgba(18, 20, 29, 0.8);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  padding: 1.25rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.install-cmd-left {
  display: flex;
  align-items: center;
  gap: 1rem;
  overflow: hidden;
}

.install-cmd-icon {
  color: #38BDF8;
  flex-shrink: 0;
}

.install-cmd-text {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: #E2E8F0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-cmd-copy {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 500;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.btn-cmd-copy:hover {
  background: rgba(56, 189, 248, 0.2);
  color: #38BDF8;
}

/* --------------------------------------------------------------------------
   10. Wiki Portal Section (From Beginner to Master)
   -------------------------------------------------------------------------- */
.wiki-portal-section {
  position: relative;
  padding: 6rem 0;
  z-index: 1;
}

.wiki-portal-banner {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.6) 0%, rgba(15, 23, 42, 0.8) 100%);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 24px;
  padding: 3rem;
  position: relative;
  overflow: hidden;
}

.wiki-portal-banner::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.wiki-portal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.wiki-portal-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: #fff;
}

.wiki-portal-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 0.35rem;
  max-width: 650px;
}

.btn-enter-wiki {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.9rem 1.8rem;
  border-radius: 12px;
  background: linear-gradient(135deg, #0284C7 0%, #0369A1 100%);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: 0 4px 20px rgba(2, 132, 199, 0.4);
  transition: all 0.2s ease;
}

.btn-enter-wiki:hover {
  background: linear-gradient(135deg, #38BDF8 0%, #0284C7 100%);
  box-shadow: 0 6px 26px rgba(56, 189, 248, 0.5);
  transform: translateY(-2px);
}

.wiki-chapters-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.wiki-ch-card {
  padding: 1.5rem;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

.wiki-ch-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(56, 189, 248, 0.35);
  transform: translateY(-3px);
}

.wiki-ch-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #38BDF8;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.wiki-ch-name {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.4rem;
}

.wiki-ch-summary {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
  flex: 1;
}

/* --------------------------------------------------------------------------
   11. Toast Notification Floating System
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 99999;
  pointer-events: none;
}

.toast-item {
  pointer-events: auto;
  background: rgba(18, 20, 29, 0.95);
  border: 1px solid rgba(56, 189, 248, 0.35);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  color: #fff;
  padding: 0.85rem 1.25rem;
  border-radius: 12px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.6), 0 0 20px rgba(56, 189, 248, 0.15);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  min-width: 260px;
  max-width: 420px;
  transform: translateY(20px);
  opacity: 0;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
}

.toast-item.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-item.hide {
  transform: translateY(10px);
  opacity: 0;
}

.toast-icon {
  flex-shrink: 0;
  color: #38BDF8;
}

.toast-icon.success {
  color: #34D399;
}

/* Responsive Overrides for Downloads & Wiki */
@media (max-width: 1024px) {
  .download-cards-grid {
    grid-template-columns: 1fr;
  }
  .wiki-chapters-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .wiki-chapters-grid {
    grid-template-columns: 1fr;
  }
  .wiki-portal-banner {
    padding: 1.75rem;
  }
  .install-cmd-strip {
    flex-direction: column;
    align-items: stretch;
  }
  .toast-container {
    left: 1rem;
    right: 1rem;
    bottom: 1rem;
  }
  .toast-item {
    min-width: unset;
    width: 100%;
  }
}

/* --------------------------------------------------------------------------
   12. Accessibility & Cross-Browser Graceful Fallback (prefers-reduced-motion / No-GSAP)
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .pin-download-runway {
    height: auto !important;
    min-height: auto !important;
    padding: 5rem 0 !important;
  }

  .pin-viewport-stage {
    position: static !important;
    height: auto !important;
    overflow: visible !important;
    padding: 0 1.5rem !important;
    transform: none !important;
    -webkit-transform: none !important;
  }

  .card-motion-wrapper,
  .card-motion-left,
  .card-motion-center,
  .card-motion-right,
  .pin-stage-header {
    transform: none !important;
    -webkit-transform: none !important;
    opacity: 1 !important;
    filter: none !important;
    will-change: auto !important;
  }

  .card-tilt-inner,
  .dl-card {
    transform: none !important;
    -webkit-transform: none !important;
    transition: none !important;
  }
}

/* Safe fallback state when GSAP / ScrollTrigger fails to initialize or is offline */
.motion-fallback .pin-download-runway,
html.no-gsap .pin-download-runway {
  height: auto !important;
  min-height: auto !important;
  padding: 5rem 0 !important;
}

.motion-fallback .pin-viewport-stage,
html.no-gsap .pin-viewport-stage {
  position: static !important;
  height: auto !important;
  overflow: visible !important;
  padding: 0 1.5rem !important;
  transform: none !important;
  -webkit-transform: none !important;
}

.motion-fallback .card-motion-wrapper,
.motion-fallback .card-motion-left,
.motion-fallback .card-motion-center,
.motion-fallback .card-motion-right,
.motion-fallback .pin-stage-header,
html.no-gsap .card-motion-wrapper,
html.no-gsap .card-motion-left,
html.no-gsap .card-motion-center,
html.no-gsap .card-motion-right,
html.no-gsap .pin-stage-header {
  transform: none !important;
  -webkit-transform: none !important;
  opacity: 1 !important;
  filter: none !important;
  will-change: auto !important;
}

.motion-fallback .card-tilt-inner,
.motion-fallback .dl-card,
html.no-gsap .card-tilt-inner,
html.no-gsap .dl-card {
  transform: none !important;
  -webkit-transform: none !important;
  transition: none !important;
}