/* ==========================================================================
   PAINT3D.IO - MODERN FLUENT & SPATIAL DESIGN SYSTEM (REFACTORED)
   Strict Alignment Grid & Color Language Extracted from Paint 3D Logo
   ========================================================================== */

:root {
  /* Official Paint 3D Logo Color Spectrum */
  --p3d-cyan: #00a2ed;
  --p3d-cyan-hover: #008ecc;
  --p3d-cyan-light: rgba(0, 162, 237, 0.12);
  
  --p3d-blue: #0078d7;
  --p3d-blue-hover: #0063b1;
  --p3d-blue-light: rgba(0, 120, 215, 0.12);
  
  --p3d-purple: #773dbd;
  --p3d-purple-hover: #672fa6;
  --p3d-purple-light: rgba(119, 61, 189, 0.12);
  
  --p3d-magenta: #e3008c;
  --p3d-magenta-hover: #c40079;
  --p3d-magenta-light: rgba(227, 0, 140, 0.12);
  
  --p3d-orange: #ff5722;
  --p3d-orange-hover: #e64a19;
  --p3d-orange-light: rgba(255, 87, 34, 0.12);
  
  --p3d-amber: #ffb900;
  --p3d-amber-light: rgba(255, 185, 0, 0.15);

  /* Spectrum Gradients */
  --p3d-ribbon-h: linear-gradient(90deg, #00a2ed 0%, #773dbd 25%, #e3008c 50%, #ff5722 75%, #ffb900 100%);
  --p3d-ribbon-angle: linear-gradient(135deg, #00a2ed 0%, #773dbd 32%, #e3008c 68%, #ff5722 100%);
  --p3d-ribbon-glow: linear-gradient(135deg, rgba(0, 162, 237, 0.25), rgba(119, 61, 189, 0.25), rgba(227, 0, 140, 0.25), rgba(255, 87, 34, 0.25));

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-display: 'Plus Jakarta Sans', var(--font-sans);
  --font-mono: 'JetBrains Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Layout Standards */
  --container-max: 1200px;
  --container-padding: 32px;
  --header-height: 74px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Variables */
body.theme-light {
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-alt: #f1f5f9;
  --bg-surface-elevated: #ffffff;
  --bg-card: #ffffff;
  --bg-input: #f8fafc;
  
  --border-color: rgba(15, 23, 42, 0.09);
  --border-subtle: rgba(15, 23, 42, 0.05);
  --border-hover: rgba(0, 120, 215, 0.4);

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --acrylic-bg: rgba(255, 255, 255, 0.92);
  --acrylic-border: rgba(255, 255, 255, 0.8);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 6px 18px rgba(15, 23, 42, 0.06), 0 2px 6px rgba(15, 23, 42, 0.03);
  --shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.04);
  --shadow-window: 0 24px 60px -12px rgba(15, 23, 42, 0.16), 0 6px 16px rgba(15, 23, 42, 0.06);

  --grid-color: rgba(148, 163, 184, 0.25);
  --table-head-bg: #f1f5f9;
}

/* Dark Theme Variables */
body.theme-dark {
  --bg-page: #080d1a;
  --bg-surface: #101726;
  --bg-surface-alt: #161f33;
  --bg-surface-elevated: #1a253d;
  --bg-card: #101726;
  --bg-input: #0b1120;

  --border-color: rgba(255, 255, 255, 0.12);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(0, 162, 237, 0.5);

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-inverse: #0f172a;

  --acrylic-bg: rgba(16, 23, 38, 0.92);
  --acrylic-border: rgba(255, 255, 255, 0.12);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.6);
  --shadow-window: 0 24px 60px -8px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(255, 255, 255, 0.12);

  --grid-color: rgba(255, 255, 255, 0.1);
  --table-head-bg: #161f33;
}

/* Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 17px;
  scroll-padding-top: 90px;
  overflow-x: hidden;
  max-width: 100vw;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
  position: relative;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.card-text a,
.data-table a,
.dossier-text a,
.section-subtitle a,
.reason-text a,
.wrapping-text a,
.install-card-desc a,
.inline-link {
  color: var(--primary-accent);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

.card-text a:hover,
.data-table a:hover,
.dossier-text a:hover,
.section-subtitle a:hover,
.reason-text a:hover,
.wrapping-text a:hover,
.install-card-desc a:hover,
.inline-link:hover {
  color: var(--primary-accent-hover);
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

code, .code-inline {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.2em 0.45em;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  color: var(--p3d-blue);
  word-break: break-all;
  overflow-wrap: anywhere;
}

body.theme-dark code, body.theme-dark .code-inline {
  color: var(--p3d-cyan);
}

.font-mono {
  font-family: var(--font-mono);
}

.material-symbols-outlined {
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-feature-settings: 'liga';
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'liga';
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
  width: 1em;
  height: 1em;
  overflow: hidden;
  flex-shrink: 0;
  user-select: none;
}

/* Top Accent Ribbon Bar */
.top-accent-bar {
  height: 4px;
  width: 100%;
  background: var(--p3d-ribbon-h);
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
}

/* ==========================================================================
   HEADER & ALIGNED NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  height: var(--header-height);
  background: var(--acrylic-bg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-color);
  transform: translateZ(0);
  transition: background var(--transition-base), border-color var(--transition-base);
}

.header-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  user-select: none;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.brand-link:hover {
  opacity: 0.92;
}

.brand-icon {
  height: 44px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 2px 6px rgba(0, 162, 237, 0.3));
  transition: transform var(--transition-fast);
}

.brand-link:hover .brand-icon {
  transform: scale(1.05);
}

.brand-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.55rem;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1;
}

.brand-dot {
  color: var(--p3d-cyan);
  font-weight: 800;
}

/* Desktop Navigation */
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 1;
}

.nav-link {
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--p3d-blue);
  background-color: var(--p3d-blue-light);
}

body.theme-dark .nav-link:hover {
  color: var(--p3d-cyan);
  background-color: var(--p3d-cyan-light);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header-cta {
  white-space: nowrap;
  flex-shrink: 0;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 14px rgba(0, 120, 215, 0.35);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 120, 215, 0.45);
}

.header-cta .material-symbols-outlined {
  font-size: 1.15rem;
  width: 1.15rem;
  height: 1.15rem;
  overflow: hidden;
  flex-shrink: 0;
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  line-height: 1;
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.7);
}

.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--text-primary);
  border-color: var(--p3d-cyan);
}

.theme-toggle-btn .icon-moon {
  display: none;
}

body.theme-dark .theme-toggle-btn .icon-sun {
  display: none;
}

body.theme-dark .theme-toggle-btn .icon-moon {
  display: block;
  color: var(--p3d-amber);
}

.mobile-toggle-btn {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

/* Mobile Drawer */
.mobile-drawer {
  display: none;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 24px;
}

.mobile-drawer.active {
  display: block;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-nav-link {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
}

.mobile-nav-link:hover {
  background: var(--bg-surface-alt);
  color: var(--text-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  line-height: 1;
  white-space: nowrap;
}

.btn .material-symbols-outlined {
  width: 1em;
  height: 1em;
  font-size: 1.25em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}

.btn-sm {
  padding: 9px 16px;
  font-size: 0.88rem;
}

.btn-sm .material-symbols-outlined {
  font-size: 1.15rem;
  width: 1.15rem;
  height: 1.15rem;
}

.btn-md {
  padding: 12px 20px;
  font-size: 1rem;
}

.btn-md .material-symbols-outlined {
  font-size: 1.25rem;
  width: 1.25rem;
  height: 1.25rem;
}

.btn-lg {
  padding: 14px 26px;
  font-size: 1.05rem;
}

.btn-lg .material-symbols-outlined {
  font-size: 1.35rem;
  width: 1.35rem;
  height: 1.35rem;
}

.btn-primary {
  background: var(--p3d-blue);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 120, 215, 0.3);
}

.btn-primary:hover {
  background: var(--p3d-blue-hover);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(0, 120, 215, 0.45);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--bg-surface-alt);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--bg-surface-alt);
}

.w-full {
  width: 100%;
}

.mt-4 {
  margin-top: 1rem;
}

/* Section Containers & Headers */
.section-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  box-sizing: border-box;
}

.content-section {
  padding: 100px 0;
  border-bottom: 1px solid var(--border-color);
  position: relative;
  scroll-margin-top: var(--header-height, 70px);
}

/* Distinct Alternating Section Backgrounds (Ending "Just White") */
.section-what-is {
  background-color: var(--bg-surface);
}

.section-features {
  background: #f1f5f9;
  position: relative;
}

body.theme-dark .section-features {
  background: #0b1120;
}

/* Clean Unified Light Theme Sections (Aligned with Paint 3D Features) */
.section-download {
  padding-top: 50px;
  background-color: var(--bg-surface-alt);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-download .section-header {
  margin-bottom: 34px;
}

.section-why-use {
  background-color: var(--bg-surface);
}

.section-reviews {
  background-color: var(--bg-surface-alt);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-how-it-works {
  background: #f8fafc;
}

body.theme-dark .section-how-it-works {
  background: #0e1628;
}

.section-in-action {
  background-color: var(--bg-surface-alt);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-faqs {
  background-color: var(--bg-surface);
}

.section-wrapping-up {
  background-color: var(--bg-surface-alt);
  position: relative;
  border-top: 1px solid var(--border-color);
}

.section-header {
  max-width: 820px;
  margin: 0 auto 56px auto;
  text-align: center;
}

.section-kicker {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--p3d-blue);
  margin-bottom: 12px;
}

body.theme-dark .section-kicker {
  color: #38bdf8;
}

.section-title {
  font-family: var(--font-display);
  font-size: 2.65rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-top: 16px;
  line-height: 1.7;
}

/* ==========================================================================
   HERO SECTION (ATMOSPHERIC GLOWS & ALIGNMENT)
   ========================================================================== */
.hero-section {
  padding: 80px 0 100px 0;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.hero-ambient-glows {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
  clip-path: inset(0);
  z-index: 0;
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.15;
}

.glow-cyan {
  width: 500px;
  height: 500px;
  background: var(--p3d-cyan);
  top: -100px;
  right: -50px;
}

.glow-purple {
  width: 450px;
  height: 450px;
  background: var(--p3d-purple);
  bottom: -50px;
  left: -50px;
}

.glow-magenta {
  width: 400px;
  height: 400px;
  background: var(--p3d-magenta);
  top: 40%;
  left: 45%;
}

.hero-header-box {
  max-width: 920px;
  margin: 0 auto 50px auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
}

.pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--p3d-ribbon-h);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 5.5vw, 4.25rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.08;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.hero-lead {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 760px;
  margin: 0 auto 32px auto;
  text-align: center;
  text-wrap: balance;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 36px;
}

.hero-specs-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.spec-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
}

.spec-icon {
  font-size: 1.2rem;
  width: 1.2rem;
  height: 1.2rem;
  overflow: hidden;
  flex-shrink: 0;
  color: var(--p3d-blue);
}

body.theme-dark .spec-icon {
  color: var(--p3d-cyan);
}

/* Hero 3D Window Mockup */
.hero-window-wrapper {
  position: relative;
  z-index: 1;
}

.paint-window {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-window);
  overflow: hidden;
  transition: border-color var(--transition-base);
}

.window-ribbon {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 8px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  overflow-x: auto;
}

.ribbon-tabs {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ribbon-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  gap: 2px;
  transition: all var(--transition-fast);
}

.ribbon-tab .material-symbols-outlined {
  font-size: 1.3rem;
}

.ribbon-tab:hover {
  background: var(--bg-surface-alt);
  color: var(--text-primary);
}

.ribbon-tab.active {
  color: var(--p3d-blue);
  background: var(--p3d-blue-light);
  box-shadow: 0 0 0 1px rgba(0, 120, 215, 0.25);
}

body.theme-dark .ribbon-tab.active {
  color: var(--p3d-cyan);
  background: var(--p3d-cyan-light);
}

.ribbon-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.tool-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.tool-chip:hover {
  border-color: var(--p3d-cyan);
  color: var(--text-primary);
}

.active-chip {
  background: var(--p3d-blue);
  color: #ffffff;
  border-color: var(--p3d-blue);
}

.active-chip:hover {
  color: #ffffff;
}

/* Window Workspace - Hero Authentic Screenshot Showcase */
.window-workspace.hero-screenshot-workspace {
  display: block;
  min-height: auto;
  background: #18191c;
  position: relative;
  overflow: hidden;
}

.hero-screenshot-container {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: #18191c;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-screenshot-display {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  transition: opacity 0.25s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.screenshot-stage-overlay {
  position: absolute;
  bottom: 18px;
  left: 20px;
  right: 20px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  pointer-events: none;
}

.screenshot-zoom-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: rgba(0, 120, 215, 0.95);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-full);
  color: #ffffff;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  pointer-events: auto;
  box-shadow: 0 4px 14px rgba(0, 120, 215, 0.4);
  transition: all var(--transition-fast);
}

.screenshot-zoom-btn:hover {
  background: var(--p3d-blue);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 120, 215, 0.6);
}

/* ==========================================================================
   SECTION 2: WHAT IS PAINT 3D?
   ========================================================================== */
/* ==========================================================================
   SECTION 2: WHAT IS PAINT 3D? (THE 3 PILLARS: WHAT IT IS, WHAT IT DOES, WHO IT IS FOR)
   ========================================================================== */
.what-is-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 56px;
}

.what-is-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 34px 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.what-is-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.card-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  margin-bottom: 18px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.card-icon-wrapper .material-symbols-outlined {
  font-size: 1.6rem;
  width: 1.6rem;
  height: 1.6rem;
}

.bg-gradient-cyan {
  background: linear-gradient(135deg, var(--p3d-cyan), var(--p3d-blue));
}

.bg-gradient-purple {
  background: linear-gradient(135deg, var(--p3d-purple), var(--p3d-magenta));
}

.bg-gradient-magenta {
  background: linear-gradient(135deg, var(--p3d-magenta), #f43f5e);
}

.what-is-tag {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.text-cyan {
  color: var(--p3d-blue);
}

body.theme-dark .text-cyan {
  color: var(--p3d-cyan);
}

.text-purple {
  color: var(--p3d-purple);
}

body.theme-dark .text-purple {
  color: #c084fc;
}

.text-magenta {
  color: var(--p3d-magenta);
}

body.theme-dark .text-magenta {
  color: #f472b6;
}

.what-is-card .card-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.what-is-card .card-text {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 22px;
}

.what-is-divider {
  height: 1px;
  background: var(--border-color);
  width: 100%;
  margin-bottom: 20px;
}

.what-is-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: auto;
}

.what-is-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.what-is-list .check-icon {
  font-size: 1.1rem;
  width: 1.1rem;
  height: 1.1rem;
  color: #10b981;
  flex-shrink: 0;
  margin-top: 2px;
}

.what-is-list strong {
  color: var(--text-primary);
  font-weight: 700;
}

/* Comparison Table */
.comparison-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.comparison-header {
  padding: 24px 32px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}

.comparison-title {
  font-size: 1.25rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
}

.comparison-badge {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  background: var(--p3d-blue-light);
  color: var(--p3d-blue);
  font-weight: 600;
}

body.theme-dark .comparison-badge {
  background: var(--p3d-cyan-light);
  color: var(--p3d-cyan);
}

.table-responsive {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.data-table th, .data-table td {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  background: #0f172a;
  color: #ffffff;
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 18px 24px;
  border-bottom: 2px solid var(--p3d-blue);
}

body.theme-dark .data-table th {
  background: #111827;
  border-bottom-color: var(--p3d-cyan);
}

.data-table td {
  color: var(--text-secondary);
}

.data-table tbody tr:hover {
  background: var(--bg-surface-alt);
}

.comparison-footer {
  padding: 18px 24px;
  background: var(--bg-surface-alt);
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.6;
}

/* ==========================================================================
   SECTION 3: PAINT 3D FEATURES (8 DISTINCTIVE BLOCKS)
   ========================================================================== */
.features-master-layout {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.feature-block {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 44px;
  box-shadow: var(--shadow-sm);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  position: relative;
  overflow: hidden;
}

/* Authentic Spectrum Top Accents for Feature Cards */
.feature-block:nth-child(1) { border-top: 5px solid var(--p3d-cyan); }
.feature-block:nth-child(2) { border-top: 5px solid var(--p3d-purple); }
.feature-block:nth-child(3) { border-top: 5px solid var(--p3d-magenta); }
.feature-block:nth-child(4) { border-top: 5px solid var(--p3d-blue); }
.feature-block:nth-child(5) { border-top: 5px solid var(--p3d-orange); }
.feature-block:nth-child(6) { border-top: 5px solid var(--p3d-amber); }
.feature-block:nth-child(7) { border-top: 5px solid #0d9488; }
.feature-block:nth-child(8) { border-top: 5px solid #8b5cf6; }

.feature-block:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.feature-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.feature-tag .material-symbols-outlined {
  font-size: 1.15rem;
}

.bg-cyan-subtle { background: var(--p3d-cyan-light); color: var(--p3d-cyan); }
.bg-purple-subtle { background: var(--p3d-purple-light); color: var(--p3d-purple); }
.bg-magenta-subtle { background: var(--p3d-magenta-light); color: var(--p3d-magenta); }
.bg-blue-subtle { background: var(--p3d-blue-light); color: var(--p3d-blue); }
.bg-orange-subtle { background: var(--p3d-orange-light); color: var(--p3d-orange); }
.bg-amber-subtle { background: var(--p3d-amber-light); color: #d97706; }
.bg-teal-subtle { background: rgba(13, 148, 136, 0.12); color: #0d9488; }
.bg-indigo-subtle { background: rgba(139, 92, 246, 0.12); color: #8b5cf6; }

.feature-heading {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.25;
}

.feature-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.68;
  margin-bottom: 20px;
}

/* Balanced 2x2 Feature Highlights Grid */
.feature-highlights-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 14px;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 9px 12px;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}

.highlight-item:hover {
  border-color: var(--border-hover);
  background: var(--bg-surface-elevated);
  transform: translateY(-2px);
}

.hl-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.feature-block:nth-child(1) .hl-icon { color: var(--p3d-cyan); }
.feature-block:nth-child(2) .hl-icon { color: var(--p3d-purple); }
.feature-block:nth-child(3) .hl-icon { color: var(--p3d-magenta); }
.feature-block:nth-child(4) .hl-icon { color: var(--p3d-blue); }
.feature-block:nth-child(5) .hl-icon { color: var(--p3d-orange); }
.feature-block:nth-child(6) .hl-icon { color: #d97706; }
.feature-block:nth-child(7) .hl-icon { color: #0d9488; }
.feature-block:nth-child(8) .hl-icon { color: #8b5cf6; }

.hl-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.hl-title {
  color: var(--text-primary);
  font-weight: 700;
  font-size: 0.84rem;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hl-text {
  color: var(--text-muted);
  font-size: 0.74rem;
  line-height: 1.25;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==========================================================================
   AUTHENTIC FEATURE SCREENSHOT CARDS (CLEAN CHROME-FREE FRAME)
   ========================================================================== */
.feature-screenshot-container {
  width: 100%;
  display: flex;
  flex-direction: column;
}

.feature-screenshot-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 10px 25px -10px rgba(0, 0, 0, 0.18);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer;
  display: block;
}

.feature-screenshot-card:hover {
  transform: translateY(-4px);
  border-color: var(--p3d-cyan);
  box-shadow: 0 16px 36px -10px rgba(0, 162, 237, 0.25);
}

.screenshot-img-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 1920 / 1040;
  overflow: hidden;
  background: #000000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-app-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.feature-screenshot-card:hover .feature-app-img {
  transform: scale(1.02);
}

.screenshot-hover-zoom {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #ffffff;
  font-size: 0.88rem;
  font-weight: 600;
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.feature-screenshot-card:hover .screenshot-hover-zoom {
  opacity: 1;
}

.screenshot-hover-zoom .material-symbols-outlined {
  font-size: 1.4rem;
  color: var(--p3d-cyan);
}

/* Sub-features and bullet points */
.sub-features-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sub-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.sf-icon {
  font-size: 1.4rem;
  color: var(--p3d-purple);
  margin-top: 2px;
  flex-shrink: 0;
}

.feature-bullet-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.bullet-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.bullet-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-top: 10px;
  flex-shrink: 0;
}

.bg-magenta { background-color: var(--p3d-magenta); }
.bg-cyan { background-color: var(--p3d-cyan); }
.bg-blue { background-color: var(--p3d-blue); }

/* Magic Select workflow steps */
.magic-workflow-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
}

.mw-step {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mw-num {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--p3d-orange);
}

.mw-step strong {
  font-size: 0.92rem;
  color: var(--text-primary);
}

.mw-step span {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* Callout Box */
.callout-box {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  margin-top: 24px;
}

.callout-warning {
  border-left: 5px solid var(--p3d-orange);
}

.callout-header {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--p3d-orange);
  font-size: 0.98rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.callout-body {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.export-rule-callout {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  background: var(--bg-surface);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.export-rule-callout .material-symbols-outlined {
  color: var(--p3d-blue);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Transparency Steps */
.transparency-steps {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.t-step {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.t-num {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--p3d-blue);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}

.t-info {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   SECTION 4: DOWNLOAD & SPECS (CLEAN WORKSTATION ALIGNMENT)
   ========================================================================== */
.status-dossier-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 44px 48px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 44px;
  border-left: 6px solid #f59e0b;
}

.dossier-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.dossier-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #d97706;
  background: rgba(245, 158, 11, 0.1);
  padding: 6px 14px;
  border-radius: var(--radius-full);
}

.badge-dot-amber {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #f59e0b;
}

.dossier-date {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 500;
}

.dossier-title {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
  line-height: 1.3;
}

.dossier-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.72;
  margin-bottom: 28px;
}

.dossier-facts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.df-card {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px 26px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.65;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

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

.df-card strong {
  display: block;
  color: var(--text-primary);
  margin-bottom: 8px;
  font-size: 1.02rem;
}

.df-card .material-symbols-outlined {
  margin-top: 2px;
  flex-shrink: 0;
  font-size: 1.4rem;
}

.text-success { color: #10b981; }
.text-warning { color: #f59e0b; }
/* Direct Download Action Banner */
.download-action-banner {
  background: linear-gradient(135deg, rgba(0, 120, 215, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
  border: 1px solid rgba(0, 120, 215, 0.28);
  border-radius: var(--radius-xl);
  padding: 36px 44px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 28px;
  margin-bottom: 44px;
  box-shadow: 0 4px 20px -2px rgba(0, 120, 215, 0.08);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

body.theme-dark .download-action-banner {
  background: linear-gradient(135deg, rgba(0, 210, 255, 0.07) 0%, rgba(168, 85, 247, 0.07) 100%);
  border-color: rgba(0, 210, 255, 0.28);
  box-shadow: 0 4px 24px -2px rgba(0, 0, 0, 0.4);
}

.download-action-banner:hover {
  border-color: var(--p3d-blue);
  box-shadow: 0 8px 30px -4px rgba(0, 120, 215, 0.16);
  transform: translateY(-2px);
}

body.theme-dark .download-action-banner:hover {
  border-color: var(--p3d-cyan);
  box-shadow: 0 8px 32px -4px rgba(0, 210, 255, 0.18);
}

.dab-content {
  flex: 1;
  min-width: 280px;
}

.dab-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  color: #10b981;
  background: rgba(16, 185, 129, 0.1);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.dab-badge .material-symbols-outlined {
  font-size: 1.15rem;
}

.dab-title {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.dab-text {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.dab-cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  flex-shrink: 0;
}

.dab-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  padding-left: 2px;
}

/* Installation Methods */
.installation-methods-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 44px;
  min-width: 0;
  align-items: stretch;
}

.install-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 38px 40px;
  box-shadow: var(--shadow-sm);
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  box-sizing: border-box;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.install-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.install-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.install-card-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.install-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--p3d-blue-light);
  color: var(--p3d-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.install-card-icon .material-symbols-outlined {
  font-size: 1.5rem;
}

body.theme-dark .install-card-icon {
  background: var(--p3d-cyan-light);
  color: var(--p3d-cyan);
}

.install-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 5px 12px;
  border-radius: var(--radius-full);
}

.install-badge .material-symbols-outlined {
  font-size: 0.92rem;
}

.badge-recommended {
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

body.theme-dark .badge-recommended {
  background: rgba(16, 185, 129, 0.16);
  color: #34d399;
  border-color: rgba(52, 211, 153, 0.3);
}

.badge-gui {
  background: rgba(0, 120, 215, 0.08);
  color: var(--p3d-blue);
  border: 1px solid rgba(0, 120, 215, 0.2);
}

body.theme-dark .badge-gui {
  background: rgba(0, 210, 255, 0.1);
  color: var(--p3d-cyan);
  border-color: rgba(0, 210, 255, 0.25);
}

.install-card-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.3;
}

.install-card-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
}

.install-card-action {
  margin-top: auto;
}

.code-snippet-box {
  background: #0f172a;
  border: 1px solid #1e293b;
  border-radius: var(--radius-md);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-width: 0;
  height: 58px;
  box-sizing: border-box;
}

.code-snippet-box code {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  background: none;
  border: none;
  padding: 0;
  color: #38bdf8;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #ffffff;
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  border-color: #0284c7;
  background: #0284c7;
}

.app-installer-preview {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  height: 58px;
  box-sizing: border-box;
}

.aip-header {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.aip-icon {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex-shrink: 0;
}

.aip-meta {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}

.aip-app-name {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--text-primary);
  line-height: 1.2;
}

.aip-pub {
  font-size: 0.74rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.aip-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.76rem;
  font-weight: 600;
  color: #059669;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
  white-space: nowrap;
}

.aip-badge .material-symbols-outlined {
  font-size: 0.95rem;
}

/* Security Notice */
.security-warning-box {
  background: rgba(239, 68, 68, 0.05);
  border: 1px solid rgba(239, 68, 68, 0.25);
  border-left: 6px solid #ef4444;
  border-radius: var(--radius-xl);
  padding: 32px 36px;
  display: flex;
  gap: 24px;
  margin-bottom: 56px;
}

.sw-icon .material-symbols-outlined {
  font-size: 2.6rem;
  color: #ef4444;
  flex-shrink: 0;
  margin-top: 2px;
}

.sw-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #b91c1c;
  margin-bottom: 10px;
  line-height: 1.35;
}

.sw-body {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.sw-body:last-child {
  margin-bottom: 0;
}

body.theme-dark .security-warning-box {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.35);
}

body.theme-dark .sw-title {
  color: #f87171;
}

/* System Requirements Grid */
.specs-grid-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  margin-bottom: 56px;
}

.specs-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 44px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.specs-card .spec-notice {
  margin-top: auto;
}

.specs-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.specs-card-header {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.specs-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}

.badge-min {
  background: var(--bg-surface-alt);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.badge-rec {
  background: var(--p3d-blue-light);
  color: var(--p3d-blue);
  border: 1px solid rgba(0, 120, 215, 0.2);
}

body.theme-dark .badge-rec {
  background: var(--p3d-cyan-light);
  color: var(--p3d-cyan);
}

.specs-heading {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.25;
}

.specs-subtext {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.specs-list {
  display: flex;
  flex-direction: column;
}

.spec-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 15px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.96rem;
  gap: 24px;
}

.spec-row:last-child {
  border-bottom: none;
}

.spec-prop {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.92rem;
  flex: 0 0 170px;
  line-height: 1.45;
}

.spec-val {
  color: var(--text-primary);
  font-weight: 600;
  text-align: right;
  font-size: 0.96rem;
  line-height: 1.45;
  flex: 1;
}

.spec-notice {
  margin-top: 24px;
  padding: 16px 20px;
  background: var(--bg-surface-alt);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--p3d-blue);
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  gap: 12px;
  line-height: 1.65;
}

.spec-notice .material-symbols-outlined {
  flex-shrink: 0;
  margin-top: 2px;
}

/* OS Comparison */
.os-comparison-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 44px;
  box-shadow: var(--shadow-sm);
}

.os-heading {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.25;
}

.os-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
}

.os-cards-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.os-card {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

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

.os-card-badge {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--p3d-blue);
  margin-bottom: 10px;
}

body.theme-dark .os-card-badge {
  color: var(--p3d-cyan);
}

.os-card-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.os-card-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.68;
}

.os-card-list li strong {
  color: var(--text-primary);
}

/* ==========================================================================
   SECTION 5: WHY USE PAINT 3D?
   ========================================================================== */
.reasons-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.reason-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.reason-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
}

.reason-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--p3d-blue);
  opacity: 0.45;
  margin-bottom: 18px;
}

body.theme-dark .reason-number {
  color: var(--p3d-cyan);
  opacity: 0.65;
}

.reason-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.reason-text {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 28px;
}

.reason-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--p3d-blue);
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

body.theme-dark .reason-footer {
  color: var(--p3d-cyan);
}

.reason-card-featured {
  grid-column: span 2;
  background: linear-gradient(135deg, rgba(0, 162, 237, 0.06), rgba(119, 61, 189, 0.06)), var(--bg-surface);
  border-color: rgba(0, 120, 215, 0.3);
}

/* ==========================================================================
   EDITORIAL REVIEWS SECTION ("What Reviewers Are Saying")
   ========================================================================== */
.editorial-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  background: rgba(192, 38, 211, 0.08);
  color: #a21caf;
  border: 1px solid rgba(192, 38, 211, 0.22);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

body.theme-dark .editorial-pill {
  background: rgba(217, 70, 239, 0.12);
  color: #e879f9;
  border-color: rgba(217, 70, 239, 0.25);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.review-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  box-sizing: border-box;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.review-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
}

.review-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 6px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  box-sizing: border-box;
  overflow: hidden;
}

body.theme-dark .review-avatar {
  background: #1e293b;
  border-color: rgba(255, 255, 255, 0.14);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
}

.pcmag-avatar {
  border-color: rgba(220, 38, 38, 0.2);
  padding: 4px;
}

body.theme-dark .pcmag-avatar {
  border-color: rgba(248, 113, 113, 0.25);
}

.wc-avatar {
  border-color: rgba(2, 132, 199, 0.2);
}

body.theme-dark .wc-avatar {
  border-color: rgba(56, 189, 248, 0.25);
}

.tr-avatar {
  border-color: rgba(228, 7, 132, 0.2);
}

body.theme-dark .tr-avatar {
  border-color: rgba(244, 114, 182, 0.25);
}

.review-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.review-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.review-pub-name {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
}

.review-pub-category {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.review-divider {
  height: 1px;
  background: var(--border-color);
  margin: 20px 0 22px 0;
  width: 100%;
}

.review-body {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 26px;
}

.review-footer {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.review-verified-icon {
  font-size: 1.05rem;
  color: #10b981;
}

.review-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--p3d-purple);
  text-decoration: none;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

body.theme-dark .review-link {
  color: #c084fc;
}

.review-link .material-symbols-outlined {
  font-size: 1rem;
  transition: transform var(--transition-fast);
}

.review-link:hover {
  color: var(--p3d-blue);
  gap: 8px;
}

body.theme-dark .review-link:hover {
  color: var(--p3d-cyan);
}

.review-link:hover .material-symbols-outlined {
  transform: translateX(3px);
}

/* ==========================================================================
   SECTION 6: HOW DOES PAINT 3D WORK? (PIPELINE)
   ========================================================================== */
.pipeline-flow-container {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 900px;
  margin: 0 auto;
}

.pipeline-step-item {
  display: flex;
  gap: 28px;
  position: relative;
}

.step-badge-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 52px;
}

.step-counter {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 2px solid var(--p3d-blue);
  color: var(--p3d-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  box-shadow: var(--shadow-sm);
  z-index: 2;
}

body.theme-dark .step-counter {
  border-color: var(--p3d-cyan);
  color: var(--p3d-cyan);
}

.step-connector {
  width: 3px;
  flex: 1;
  background: var(--border-color);
  margin: 10px 0;
}

.step-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 28px;
  flex: 1;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.step-card:hover {
  transform: translateX(6px);
  border-color: var(--border-hover);
}

.step-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.step-icon {
  color: var(--p3d-blue);
  font-size: 1.45rem;
}

body.theme-dark .step-icon {
  color: var(--p3d-cyan);
}

.step-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.step-body {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.step-card-split {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 24px;
  align-items: center;
}

.step-card-text {
  display: flex;
  flex-direction: column;
}

.step-visual-preview {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #18191c;
  border: 1px solid var(--border-color);
  max-height: 155px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.step-visual-preview:hover {
  transform: translateY(-2px);
  border-color: var(--p3d-cyan);
}

.step-preview-thumb {
  width: 100%;
  height: 155px;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-fast);
}

.step-visual-preview:hover .step-preview-thumb {
  transform: scale(1.04);
}

.step-visual-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 600;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.step-visual-preview:hover .step-visual-overlay {
  opacity: 1;
}

.step-visual-overlay .material-symbols-outlined {
  font-size: 1.1rem;
  color: var(--p3d-cyan);
}

.step-card-final {
  background: linear-gradient(135deg, rgba(0, 162, 237, 0.06), rgba(119, 61, 189, 0.06)), var(--bg-surface);
  border-color: rgba(0, 120, 215, 0.35);
}

.format-chips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.format-chip {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  flex-direction: column;
}

.fmt-ext {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--p3d-blue);
}

body.theme-dark .fmt-ext {
  color: var(--p3d-cyan);
}

.fmt-use {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ==========================================================================
   SECTION: 3D ECOSYSTEM & CROSS-APP INTEROPERABILITY
   ========================================================================== */
.section-ecosystem {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 88px 0;
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 36px;
  align-items: stretch;
}

.ecosystem-features-col {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.ecosystem-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.ecosystem-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
}

.ecosystem-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.eco-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  flex-shrink: 0;
}

.eco-icon-office {
  background: rgba(0, 120, 215, 0.12);
  color: var(--p3d-blue);
}

.eco-icon-maya {
  background: rgba(119, 61, 189, 0.12);
  color: var(--p3d-purple);
}

.eco-icon-surface {
  background: rgba(227, 0, 140, 0.12);
  color: var(--p3d-magenta);
}

.ecosystem-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.ecosystem-card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.ecosystem-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.eco-pill {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

/* Screenshot Request & Showcase Card */
.ecosystem-screenshot-col {
  display: flex;
  flex-direction: column;
}

.screenshot-request-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.request-card-header {
  padding: 16px 20px;
  background: var(--bg-surface-alt);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.request-meta-left {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
}

.request-img-wrapper {
  position: relative;
  overflow: hidden;
  background: #0f172a;
  aspect-ratio: 16 / 9;
  cursor: pointer;
  border-bottom: 1px solid var(--border-color);
}

.request-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-smooth);
}

.request-img-wrapper:hover .request-img {
  transform: scale(1.02);
}

.request-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.88) 0%, rgba(15, 23, 42, 0.25) 55%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 16px 20px;
  color: #ffffff;
}

.request-overlay-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  background: rgba(0, 162, 237, 0.92);
  backdrop-filter: blur(8px);
  padding: 4px 11px;
  border-radius: var(--radius-full);
  margin-bottom: 6px;
  width: fit-content;
}

.request-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  flex: 1;
}

.request-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
}

.request-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.request-divider {
  height: 1px;
  background: var(--border-color);
  width: 100%;
  margin: 2px 0;
}

.interop-matrix-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.matrix-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
}

.matrix-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.matrix-card {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

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

.matrix-ext {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  padding: 3px 7px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.fbx-ext {
  background: rgba(0, 120, 215, 0.12);
  color: var(--p3d-blue);
  border: 1px solid rgba(0, 120, 215, 0.25);
}

.glb-ext {
  background: rgba(119, 61, 189, 0.12);
  color: var(--p3d-purple);
  border: 1px solid rgba(119, 61, 189, 0.25);
}

.mf-ext {
  background: rgba(227, 0, 140, 0.12);
  color: var(--p3d-magenta);
  border: 1px solid rgba(227, 0, 140, 0.25);
}

.obj-ext {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.matrix-details {
  display: flex;
  flex-direction: column;
  min-width: 0;
  gap: 1px;
}

.matrix-name {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.matrix-desc {
  font-size: 0.7rem;
  color: var(--text-secondary);
  line-height: 1.3;
}

.interop-highlights-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 2px;
}

.interop-highlight-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.interop-check-icon {
  font-size: 1.05rem;
  color: #10b981;
  flex-shrink: 0;
}

@media (max-width: 992px) {
  .ecosystem-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   SECTION 7: PAINT 3D IN ACTION (OFFICIAL VIDEO & TUTORIAL SHOWCASE)
   ========================================================================== */
.action-grid {
  max-width: 1040px;
  margin: 0 auto;
}

.action-video-showcase-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: auto;
}

.video-showcase-header {
  padding: 18px 28px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
}

.vsh-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.vsh-title .material-symbols-outlined {
  color: var(--p3d-blue);
  font-size: 1.4rem;
}

body.theme-dark .vsh-title .material-symbols-outlined {
  color: var(--p3d-cyan);
}

.vsh-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.video-quality-badge {
  padding: 4px 10px;
  background: #10b981;
  color: #ffffff;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.meta-divider {
  opacity: 0.4;
}

.video-player-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
  background: #000000;
  overflow: hidden;
}

.embedded-tutorial-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-chapters-container {
  padding: 20px 28px;
  background: var(--bg-surface-alt);
  border-top: 1px solid var(--border-color);
}

.chapters-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.chapters-header .material-symbols-outlined {
  font-size: 1.15rem;
  color: var(--p3d-blue);
}

body.theme-dark .chapters-header .material-symbols-outlined {
  color: var(--p3d-cyan);
}

.chapters-chips-scroll {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.chapter-chip {
  flex-shrink: 0;
  padding: 7px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.chapter-chip:hover {
  border-color: var(--p3d-blue);
  color: var(--p3d-blue);
  background: var(--p3d-blue-light);
}

.chapter-chip.active {
  background: var(--p3d-blue);
  color: #ffffff;
  border-color: var(--p3d-blue);
  box-shadow: 0 2px 10px rgba(0, 120, 215, 0.3);
}

/* ==========================================================================
   SECTION 8: PAINT 3D FAQS (ACCORDION)
   ========================================================================== */
.faq-accordion-container {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.faq-item.open {
  border-color: rgba(0, 120, 215, 0.45);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
}

body.theme-dark .faq-item.open {
  border-color: rgba(0, 216, 255, 0.45);
  box-shadow: 0 4px 22px rgba(0, 0, 0, 0.35);
}

.faq-heading {
  margin: 0;
  padding: 0;
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
}

.faq-trigger {
  width: 100%;
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  text-align: left;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  background: none;
  transition: background-color var(--transition-fast);
}

.faq-trigger:hover {
  background-color: var(--bg-surface-alt);
}

.faq-chevron {
  font-size: 1.5rem;
  color: var(--text-muted);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.faq-item.open .faq-chevron {
  transform: rotate(180deg);
  color: var(--p3d-blue);
}

body.theme-dark .faq-item.open .faq-chevron {
  color: var(--p3d-cyan);
}

.faq-answer-panel {
  display: none;
  padding: 0 28px 28px 28px;
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.75;
  border-top: 1px solid var(--border-subtle);
  margin-top: 4px;
}

.faq-item.open .faq-answer-panel {
  display: block;
}

.faq-answer-panel p {
  margin-bottom: 14px;
}

.faq-answer-panel p:last-child {
  margin-bottom: 0;
}

.faq-answer-panel a {
  color: var(--primary-accent);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

.faq-answer-panel a:hover {
  color: var(--primary-accent-hover);
}

.faq-answer-panel ul {
  margin: 14px 0 14px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-answer-panel li {
  line-height: 1.6;
}

/* ==========================================================================
   SECTION 9: WRAPPING UP!
   ========================================================================== */
.wrapping-up-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 64px 56px;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.wrapping-up-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, #0078d7 0%, #00bcf2 30%, #773dbd 65%, #e3008c 100%);
}

.wrapping-title {
  font-family: var(--font-display);
  font-size: 2.85rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.wrapping-lead {
  font-size: 1.22rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 22px;
}

.wrapping-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 44px;
}

.release-cta-box {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.release-cta-box:hover {
  border-color: var(--border-hover);
}

.acb-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 28px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-color);
}

.acb-title-grp {
  display: flex;
  align-items: center;
  gap: 16px;
}

.acb-icon {
  font-size: 2.6rem;
  color: var(--p3d-blue);
  flex-shrink: 0;
}

body.theme-dark .acb-icon {
  color: var(--p3d-cyan);
}

.acb-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.acb-hash {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.acb-status-pill {
  font-size: 0.82rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.acb-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 28px;
}

.wrapping-up-card .btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.wrapping-up-card .btn-secondary:hover {
  border-color: var(--p3d-blue);
  color: var(--p3d-blue);
  background: var(--bg-surface-alt);
}

body.theme-dark .wrapping-up-card .btn-secondary:hover {
  border-color: var(--p3d-cyan);
  color: var(--p3d-cyan);
}

.acb-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding-top: 18px;
  border-top: 1px solid var(--border-color);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 80px 0 36px 0;
}

.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.footer-logo {
  height: 38px;
  width: auto;
  object-fit: contain;
}

.footer-brand-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--text-primary);
}

.footer-brand-text .tld {
  color: var(--p3d-cyan);
}

.footer-tagline {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
}

.footer-col-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 0.92rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--p3d-blue);
}

body.theme-dark .footer-links a:hover {
  color: var(--p3d-cyan);
}

.footer-social-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer-social-link svg {
  flex-shrink: 0;
  transition: fill var(--transition-fast), transform var(--transition-fast);
}

.footer-social-link:hover {
  color: var(--p3d-blue);
  transform: translateX(2px);
}

body.theme-dark .footer-social-link:hover {
  color: var(--p3d-cyan);
}

.footer-bottom-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
  font-size: 0.88rem;
  color: var(--text-muted);
}

.bottom-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* Toast Popup */
.toast-popup {
  position: fixed;
  bottom: 28px;
  right: 28px;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  padding: 14px 22px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-base);
  z-index: 2000;
  pointer-events: none;
}

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

/* ==========================================================================
   HIGH-RESOLUTION SCREENSHOT INSPECTION LIGHTBOX
   ========================================================================== */
.screenshot-lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  padding: 24px;
}

.screenshot-lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 14, 23, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  cursor: pointer;
}

.lightbox-modal {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1200px;
  max-height: 90vh;
  background: var(--bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-xl);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.96);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.screenshot-lightbox.active .lightbox-modal {
  transform: scale(1);
}

.lightbox-header {
  padding: 16px 24px;
  background: var(--bg-surface-alt);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.lightbox-title-grp {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lightbox-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.lightbox-close-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lightbox-close-btn:hover {
  background: #ef4444;
  color: #ffffff;
  border-color: #ef4444;
}

.lightbox-body {
  padding: 0;
  background: #141517;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
  max-height: calc(90vh - 125px);
}

.lightbox-image {
  max-width: 100%;
  max-height: calc(90vh - 125px);
  object-fit: contain;
  display: block;
}

.lightbox-footer {
  padding: 14px 24px;
  background: var(--bg-surface-alt);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.lightbox-footer .material-symbols-outlined {
  color: var(--p3d-cyan);
  font-size: 1.2rem;
  flex-shrink: 0;
}

/* ==========================================================================
   BREADCRUMBS NAVIGATION (SEO & ACCESSIBILITY)
   ========================================================================== */
.breadcrumbs-trail {
  padding: 18px 0 0 0;
  margin-bottom: 8px;
}

.breadcrumbs-trail ol {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
}

.breadcrumbs-trail li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumbs-trail a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumbs-trail a:hover {
  color: var(--p3d-cyan);
}

.breadcrumbs-trail .breadcrumb-separator {
  color: var(--text-muted);
  opacity: 0.6;
  user-select: none;
  font-size: 0.8rem;
}

.breadcrumbs-trail [aria-current="page"] {
  color: var(--text-primary);
  font-weight: 600;
}

/* ==========================================================================
   ABOUT US PAGE STYLES
   ========================================================================== */
.about-hero-section {
  padding: 70px 0 50px 0;
  text-align: center;
  position: relative;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-surface);
}

.about-hero-box {
  max-width: 820px;
  margin: 0 auto;
}

.about-page-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin: 18px 0 16px 0;
  line-height: 1.15;
}

.about-page-lead {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 740px;
  margin: 0 auto;
  text-wrap: balance;
}

.about-article {
  max-width: 860px;
  margin: 0 auto;
  padding: 60px 24px 80px 24px;
}

.about-block {
  margin-bottom: 56px;
}

.about-block-kicker {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--p3d-blue);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

body.theme-dark .about-block-kicker {
  color: var(--p3d-cyan);
}

.about-block-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.3;
}

.about-prose {
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

.about-prose p {
  margin-bottom: 16px;
}

.about-prose p:last-child {
  margin-bottom: 0;
}

.about-callout-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  margin: 24px 0;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.about-callout-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 4px;
  background: var(--p3d-ribbon-h);
}

.about-callout-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.about-callout-text {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-secondary);
  margin: 0;
}

.about-grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 24px 0;
}

.about-card-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}

.about-card-item .item-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.about-card-item .item-desc {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--text-secondary);
  margin: 0;
}

.about-timeline-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 24px 0;
}

.timeline-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  box-shadow: var(--shadow-sm);
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--p3d-blue);
  background: var(--p3d-blue-light);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  flex: 0 0 150px;
  width: 150px;
  box-sizing: border-box;
  text-align: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

body.theme-dark .timeline-year {
  color: var(--p3d-cyan);
  background: var(--p3d-cyan-light);
}

.timeline-content {
  flex: 1;
}

.timeline-heading {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.timeline-text {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--text-secondary);
  margin: 0;
}

.about-cta-box {
  background: linear-gradient(135deg, rgba(0, 162, 237, 0.08), rgba(119, 61, 189, 0.08));
  border: 1px solid rgba(0, 120, 215, 0.25);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  text-align: center;
  margin-top: 48px;
}

.about-cta-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.about-cta-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 24px auto;
  line-height: 1.6;
}

.about-cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Meta date badge on document pages */
.page-meta-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 12px;
}

/* Contact Page Specific Styles */
.contact-hero-email-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  margin: 32px 0 44px 0;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.contact-hero-email-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--p3d-ribbon-h);
}

.contact-email-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--p3d-blue-light);
  color: var(--p3d-blue);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}

body.theme-dark .contact-email-badge {
  background: var(--p3d-cyan-light);
  color: var(--p3d-cyan);
}

.contact-email-address {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3.5vw, 1.9rem);
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  transition: color var(--transition-fast);
}

.contact-email-address:hover {
  color: var(--p3d-blue);
}

body.theme-dark .contact-email-address:hover {
  color: var(--p3d-cyan);
}

.contact-response-note {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin: 0;
}

.contact-checklist {
  list-style: none;
  padding: 0;
  margin: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.contact-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

.contact-checklist .check-icon {
  font-size: 1.1rem;
  color: #10b981;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES (MOBILE, TABLET, DESKTOP)
   ========================================================================== */
@media (max-width: 1080px) {
  .hero-title {
    font-size: 3.2rem;
  }
  .hero-specs-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .window-workspace {
    grid-template-columns: 1fr;
  }
  .viewport-stage {
    min-height: 400px;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  .contextual-panel {
    display: none;
  }
  .feature-block {
    grid-template-columns: 1fr;
    padding: 32px 24px;
    gap: 32px;
  }
  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
  }
  .reasons-grid {
    grid-template-columns: 1fr 1fr;
  }
  .reason-card-featured {
    grid-column: span 2;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 22px;
  }
}

@media (max-width: 768px) {
  :root {
    --container-padding: 16px;
  }
  html {
    font-size: 15px;
  }
  html, body {
    overflow-x: hidden !important;
    max-width: 100vw;
  }
  .section-container {
    padding: 0 16px;
    max-width: 100%;
    box-sizing: border-box;
  }
  .content-section {
    padding: 48px 0;
  }
  .section-header {
    margin-bottom: 28px;
  }
  .section-kicker {
    font-size: 0.76rem;
    margin-bottom: 8px;
  }
  .section-title {
    font-size: 1.85rem;
    line-height: 1.25;
    margin-bottom: 10px;
    word-break: break-word;
  }
  .section-subtitle {
    font-size: 0.95rem;
    line-height: 1.55;
  }

  /* Header */
  .brand-icon {
    height: 36px;
    width: auto;
  }
  .brand-title {
    font-size: 1.35rem;
  }
  .header-cta {
    padding: 8px 14px;
    font-size: 0.85rem;
  }
  .desktop-nav, .hide-mobile {
    display: none;
  }
  .mobile-toggle-btn {
    display: flex;
  }
  .btn {
    white-space: normal;
    text-align: center;
    max-width: 100%;
    word-break: break-word;
    box-sizing: border-box;
  }

  /* Hero Section (Immediate Mobile Access to Download CTA) */
  .hero-section {
    padding: 32px 0 44px 0;
  }
  .hero-header-box {
    margin: 0 auto 24px auto;
  }
  .pill-badge {
    padding: 5px 14px;
    font-size: 0.78rem;
    margin-bottom: 14px;
  }
  .hero-title {
    font-size: 2.35rem;
    line-height: 1.1;
    margin-bottom: 12px;
  }
  .hero-lead {
    font-size: 0.95rem;
    line-height: 1.55;
    margin: 0 auto 20px auto;
  }
  .hero-actions {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 100%;
    margin: 0 auto 22px auto;
    gap: 10px;
  }
  .hero-actions .btn {
    width: 100%;
    justify-content: center;
    padding: 13px 20px;
    font-size: 0.98rem;
  }
  .hero-specs-row {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding-top: 16px;
  }
  .spec-item {
    font-size: 0.76rem;
    padding: 8px 6px;
    white-space: normal;
    text-align: center;
    line-height: 1.25;
  }

  /* Ribbon in Hero Showcase */
  .paint-window {
    border-radius: var(--radius-md);
    max-width: 100%;
    overflow: hidden;
  }
  .window-ribbon {
    padding: 6px 10px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: 6px;
  }
  .ribbon-tabs {
    flex-shrink: 0;
    gap: 4px;
  }
  .ribbon-tab {
    padding: 6px 8px;
    font-size: 0.68rem;
    flex-shrink: 0;
  }
  .ribbon-tab .material-symbols-outlined {
    font-size: 1.15rem;
  }
  .ribbon-actions {
    display: none;
  }
  .screenshot-stage-overlay {
    bottom: 8px;
    left: 8px;
    right: 8px;
  }
  .screenshot-zoom-btn {
    padding: 5px 12px;
    font-size: 0.72rem;
  }

  /* Section 2: What is Paint 3D */
  .what-is-grid,
  .blueprint-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 32px;
  }
  .what-is-card {
    padding: 24px 18px;
    border-radius: var(--radius-lg);
  }
  .card-title {
    font-size: 1.3rem;
    line-height: 1.3;
    margin-bottom: 8px;
  }
  .card-text {
    font-size: 0.92rem;
    line-height: 1.55;
  }

  /* Comparison Table */
  .comparison-header {
    padding: 16px 16px;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .comparison-title {
    font-size: 1.15rem;
  }
  .table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .data-table {
    min-width: 580px;
  }
  .data-table th, .data-table td {
    padding: 12px 14px;
    font-size: 0.85rem;
  }

  /* Section 3: Feature Blocks */
  .features-master-layout {
    gap: 20px;
  }
  .feature-block {
    grid-template-columns: 1fr;
    padding: 22px 16px;
    gap: 18px;
    border-radius: var(--radius-lg);
    width: 100%;
    box-sizing: border-box;
    overflow: hidden;
  }
  .feature-tag {
    font-size: 0.74rem;
    padding: 4px 10px;
    margin-bottom: 10px;
  }
  .feature-heading {
    font-size: 1.5rem;
    line-height: 1.25;
    margin-bottom: 10px;
    word-break: break-word;
  }
  .feature-description {
    font-size: 0.92rem;
    line-height: 1.55;
    margin-bottom: 14px;
    word-break: break-word;
  }
  .feature-highlights-list {
    grid-template-columns: 1fr !important;
    gap: 8px;
    margin-top: 10px;
    width: 100%;
  }
  .highlight-item {
    padding: 10px 12px;
    gap: 10px;
    width: 100%;
    box-sizing: border-box;
    min-width: 0;
  }
  .hl-content {
    min-width: 0;
    flex: 1;
  }
  .hl-title {
    white-space: normal !important;
    font-size: 0.86rem;
    word-break: break-word;
  }
  .hl-text {
    white-space: normal !important;
    font-size: 0.78rem;
    word-break: break-word;
  }
  .feature-screenshot-container {
    width: 100%;
    overflow: hidden;
  }
  .screenshot-img-wrapper {
    border-radius: var(--radius-md);
  }

  /* Section 4: Download Action Banner */
  .download-action-banner {
    padding: 22px 16px;
    border-radius: var(--radius-lg);
    flex-direction: column;
    align-items: stretch;
    gap: 18px;
    width: 100%;
    box-sizing: border-box;
    margin-bottom: 24px;
  }
  .dab-content {
    min-width: 0;
    width: 100%;
  }
  .dab-badge {
    max-width: 100%;
    white-space: normal;
    word-break: break-word;
    font-size: 0.75rem;
    padding: 5px 10px;
    line-height: 1.35;
    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 10px;
  }
  .dab-title {
    font-size: 1.35rem;
    line-height: 1.25;
    word-break: break-word;
    margin-bottom: 8px;
  }
  .dab-text {
    font-size: 0.9rem;
    line-height: 1.55;
    word-break: break-word;
    overflow-wrap: anywhere;
  }
  .dab-cta {
    width: 100%;
    align-items: stretch;
  }
  .dab-cta .btn {
    width: 100%;
    justify-content: center;
    padding: 13px 18px;
    font-size: 0.98rem;
  }
  .dab-meta {
    text-align: center;
    width: 100%;
    font-size: 0.74rem;
    word-break: break-word;
  }

  /* Status Dossier Card */
  .status-dossier-card {
    padding: 20px 14px;
    border-left-width: 4px;
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
    width: 100%;
    box-sizing: border-box;
  }
  .dossier-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding-bottom: 12px;
    margin-bottom: 12px;
  }
  .dossier-badge {
    font-size: 0.74rem;
    padding: 4px 10px;
  }
  .dossier-date {
    font-size: 0.8rem;
  }
  .dossier-title {
    font-size: 1.25rem;
    line-height: 1.25;
    margin-bottom: 8px;
  }
  .dossier-text {
    font-size: 0.9rem;
    line-height: 1.55;
    margin-bottom: 16px;
  }
  .dossier-facts-grid {
    grid-template-columns: 1fr;
    gap: 10px;
    width: 100%;
  }
  .df-card {
    padding: 14px 12px;
    gap: 10px;
    font-size: 0.88rem;
    line-height: 1.5;
    border-radius: var(--radius-md);
    width: 100%;
    box-sizing: border-box;
  }
  .df-card strong {
    font-size: 0.92rem;
    margin-bottom: 4px;
  }

  /* Installation Methods & Specs */
  .installation-methods-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 24px;
  }
  .install-card {
    padding: 20px 16px;
    border-radius: var(--radius-lg);
    width: 100%;
    box-sizing: border-box;
  }
  .install-card-title {
    font-size: 1.2rem;
    line-height: 1.3;
  }
  .install-card-desc {
    font-size: 0.88rem;
    line-height: 1.55;
    margin-bottom: 14px;
  }
  .code-snippet-box {
    padding: 8px 12px;
    gap: 8px;
    height: auto;
    min-height: 46px;
    width: 100%;
    box-sizing: border-box;
  }
  .code-snippet-box code {
    font-size: 0.72rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .copy-btn {
    padding: 5px 10px;
    font-size: 0.74rem;
  }
  .specs-grid-wrapper {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .specs-card {
    padding: 24px 18px;
    border-radius: var(--radius-lg);
  }
  .specs-heading {
    font-size: 1.35rem;
    line-height: 1.3;
  }
  .specs-subtext {
    font-size: 0.88rem;
    margin-bottom: 8px;
  }
  .spec-row {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 0;
    gap: 3px;
    border-bottom: 1px solid var(--border-color);
  }
  .spec-row:last-child {
    border-bottom: none;
  }
  .spec-prop {
    flex: none;
    width: 100%;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
    text-align: left;
    line-height: 1.35;
  }
  .spec-val {
    flex: none;
    width: 100%;
    font-size: 0.94rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    line-height: 1.45;
  }
  .os-cards-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .os-card {
    padding: 18px 14px;
    border-radius: var(--radius-md);
  }

  /* Section 5: Reasons Grid */
  .reasons-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .reason-card-featured {
    grid-column: span 1;
  }
  .reason-card {
    padding: 20px 16px;
    border-radius: var(--radius-md);
  }
  .reason-number {
    font-size: 1.5rem;
    margin-bottom: 10px;
  }
  .reason-title {
    font-size: 1.15rem;
    line-height: 1.3;
    margin-bottom: 8px;
  }
  .reason-text {
    font-size: 0.88rem;
    line-height: 1.55;
    margin-bottom: 16px;
  }

  /* Section 6: Pipeline Stepper */
  .pipeline-step-item {
    gap: 10px;
    width: 100%;
  }
  .step-badge-col {
    width: 32px;
    flex-shrink: 0;
  }
  .step-counter {
    width: 32px;
    height: 32px;
    font-size: 0.78rem;
    border-width: 2px;
  }
  .step-connector {
    width: 2px;
  }
  .step-card {
    padding: 16px 14px;
    margin-bottom: 14px;
    border-radius: var(--radius-md);
    min-width: 0;
    width: 100%;
    box-sizing: border-box;
  }
  .step-card-split {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .step-card-header {
    gap: 8px;
    margin-bottom: 6px;
  }
  .step-icon {
    font-size: 1.25rem;
  }
  .step-title {
    font-size: 1.08rem;
    line-height: 1.25;
  }
  .step-body {
    font-size: 0.88rem;
    line-height: 1.5;
  }
  .step-visual-preview {
    max-height: 140px;
    margin-top: 10px;
    width: 100%;
  }
  .step-preview-thumb {
    height: 140px;
    width: 100%;
  }
  .format-chips-grid {
    grid-template-columns: 1fr;
    gap: 8px;
    margin-top: 10px;
  }
  .format-chip {
    padding: 9px 12px;
  }

  /* Section 7: Video Showcase */
  .video-showcase-header {
    padding: 12px 14px;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .vsh-title {
    font-size: 0.95rem;
  }
  .vsh-meta {
    font-size: 0.78rem;
  }

  /* Section 8: Reviews */
  .reviews-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .review-card {
    padding: 20px 16px;
    border-radius: var(--radius-md);
  }
  .review-quote {
    font-size: 0.92rem;
    line-height: 1.55;
    margin-bottom: 14px;
  }

  /* Section 8: FAQs */
  .faq-accordion-container {
    gap: 10px;
  }
  .faq-trigger {
    padding: 14px 14px;
    font-size: 0.96rem;
    gap: 10px;
  }
  .faq-chevron {
    font-size: 1.25rem;
  }
  .faq-content {
    padding: 0 14px 16px 14px;
    font-size: 0.88rem;
    line-height: 1.55;
  }

  /* Section 9: Wrapping Up & Release CTA Box */
  .wrapping-up-card {
    padding: 24px 14px;
    border-radius: var(--radius-lg);
    width: 100%;
    box-sizing: border-box;
    overflow: hidden;
  }
  .wrapping-title {
    font-size: 1.7rem;
    line-height: 1.2;
    margin-bottom: 12px;
    word-break: break-word;
  }
  .wrapping-lead {
    font-size: 0.94rem;
    line-height: 1.55;
    margin-bottom: 14px;
    word-break: break-word;
  }
  .wrapping-text {
    font-size: 0.9rem;
    line-height: 1.55;
    margin-bottom: 22px;
    word-break: break-word;
  }
  .release-cta-box {
    padding: 20px 14px;
    border-radius: var(--radius-md);
    width: 100%;
    box-sizing: border-box;
    overflow: hidden;
  }
  .acb-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 18px;
    padding-bottom: 16px;
  }
  .acb-title-grp {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    width: 100%;
  }
  .acb-icon {
    font-size: 2.2rem;
  }
  .acb-name {
    font-size: 1.15rem;
    line-height: 1.3;
    word-break: break-word;
    margin-bottom: 4px;
  }
  .acb-hash {
    font-size: 0.78rem;
  }
  .acb-status-pill {
    font-size: 0.75rem;
    padding: 4px 12px;
    align-self: flex-start;
  }
  .acb-actions {
    flex-direction: column;
    width: 100%;
    gap: 12px;
    margin-bottom: 18px;
  }
  .acb-actions .btn {
    width: 100%;
    justify-content: center;
    padding: 12px 14px;
    font-size: 0.88rem;
    line-height: 1.3;
    white-space: normal;
    text-align: center;
    word-break: break-word;
    box-sizing: border-box;
  }
  .acb-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    font-size: 0.76rem;
  }

  /* Footer */
  .site-footer {
    padding: 40px 0 24px 0;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom-bar {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
    padding-top: 18px;
  }
  .footer-meta {
    flex-direction: column;
    gap: 6px;
  }

  /* Secondary Pages */
  .about-article {
    padding: 28px 14px 44px 14px;
  }
  .about-grid-2col {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .timeline-item {
    flex-direction: column;
    gap: 6px;
  }
  .timeline-year {
    flex: 0 0 auto;
    width: auto;
  }
  .about-cta-box {
    padding: 22px 16px;
  }
  .acb-actions {
    flex-direction: column;
    width: 100%;
    gap: 10px;
  }
  .acb-actions .btn {
    width: 100%;
    justify-content: center;
  }
  .matrix-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --container-padding: 12px;
  }
  .section-container {
    padding: 0 12px;
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .hero-specs-row {
    grid-template-columns: 1fr;
  }
  .brand-title {
    font-size: 1.25rem;
  }
  .header-cta {
    padding: 7px 12px;
    font-size: 0.8rem;
  }
  .feature-block {
    padding: 18px 12px;
  }
  .feature-heading {
    font-size: 1.35rem;
  }
  .download-action-banner {
    padding: 18px 12px;
  }
  .status-dossier-card {
    padding: 16px 12px;
  }
  .step-card {
    padding: 14px 12px;
  }
  .wrapping-up-card {
    padding: 24px 14px;
  }
}