/* ==========================================================================
   ARCHIPOLY STUDIO — DESIGN SYSTEM & FEUILLE DE STYLE PRINCIPALE
   Charte graphique : Architectural Sombre (Local-First Desktop App Aesthetic)
   ========================================================================== */

/* --------------------------------------------------------------------------
   01. VARIABLES & DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Couleurs Fondamentales */
  --bg-primary: #0e0f11;
  --bg-surface: #16171a;
  --bg-surface-translucent: rgba(22, 23, 26, 0.78);
  --bg-surface-elevated: #1c1d22;
  --bg-surface-hover: #202228;

  /* Bordures Techniques */
  --border-technical: #2b2c32;
  --border-subtle: rgba(43, 44, 50, 0.6);
  --border-focus: #2e66e6;

  /* Accentuation Bleu Électrique */
  --accent-blue: #2e66e6;
  --accent-blue-hover: #457df5;
  --accent-blue-active: #204db5;
  --accent-blue-glow: rgba(46, 102, 230, 0.22);
  --accent-blue-subtle: rgba(46, 102, 230, 0.08);

  /* Typographie & Couleurs de Texte */
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, Consolas, monospace;

  --text-primary: #f0f2f5;
  --text-secondary: #9da3af;
  --text-muted: #6b7280;
  --text-light-dim: #cfd3dc;

  /* Géométrie & Espacements */
  --header-height: 72px;
  --max-content-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Transitions douces */
  --transition-fast: 160ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 260ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   02. RESET & BASE GLOBALE
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  color-scheme: dark;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Sélection de texte */
::selection {
  background-color: var(--accent-blue);
  color: #ffffff;
}

/* Barre de défilement discrète */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #23252b;
  border-radius: 4px;
  border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
  background: #343740;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   03. FOND ARCHITECTURAL (CAD GRID & AMBIENT GLOW)
   -------------------------------------------------------------------------- */
.cad-grid-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  background-image: 
    radial-gradient(rgba(43, 44, 50, 0.45) 1px, transparent 1px),
    linear-gradient(to right, rgba(43, 44, 50, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(43, 44, 50, 0.08) 1px, transparent 1px);
  background-size: 32px 32px, 64px 64px, 64px 64px;
  opacity: 0.7;
}

.ambient-glow {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(ellipse at 50% 0%, rgba(46, 102, 230, 0.15) 0%, rgba(14, 15, 17, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

/* --------------------------------------------------------------------------
   04. NAVBAR FIXE & ENTÊTE
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--bg-surface-translucent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-technical);
  z-index: 1000;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-container {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  transition: opacity var(--transition-fast);
}

.brand-logo:hover {
  opacity: 0.9;
}

.brand-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  object-fit: contain;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--accent-blue);
  background: rgba(46, 102, 230, 0.12);
  border: 1px solid rgba(46, 102, 230, 0.3);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
}

/* Navigation Links */
.main-nav {
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 0;
  position: relative;
}

.nav-mono {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-blue);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-blue);
  transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Actions Navbar */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.language-switch {
  display: inline-flex;
  align-items: center;
  padding: 3px;
  border: 1px solid var(--border-technical);
  border-radius: var(--radius-md);
  background-color: rgba(22, 23, 26, 0.5);
}

.language-button {
  padding: 5px 7px;
  border-radius: calc(var(--radius-md) - 2px);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  line-height: 1;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.language-button:hover {
  color: var(--text-primary);
}

.language-button.active {
  background-color: var(--accent-blue);
  color: #ffffff;
}

.btn-ghost-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-technical);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  background-color: rgba(22, 23, 26, 0.5);
}

.btn-ghost-nav:hover {
  color: var(--text-primary);
  border-color: var(--accent-blue);
  background-color: var(--bg-surface-elevated);
}

.nav-icon {
  width: 18px;
  height: 18px;
}

.btn-primary-nav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--accent-blue);
  color: #ffffff;
  padding: 8px 18px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-fast);
  box-shadow: 0 2px 10px rgba(46, 102, 230, 0.3);
}

.btn-primary-nav:hover {
  background-color: var(--accent-blue-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(46, 102, 230, 0.45);
}

.arrow-icon {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.btn-primary-nav:hover .arrow-icon {
  transform: translateY(1px);
}

.donation-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border: 1px solid rgba(245, 158, 11, 0.45);
  border-radius: var(--radius-md);
  background-color: rgba(245, 158, 11, 0.1);
  color: #fbbf24;
  font-size: 0.84rem;
  font-weight: 600;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.donation-nav-link:hover {
  background-color: rgba(245, 158, 11, 0.2);
  border-color: #fbbf24;
}

.donation-nav-link .donation-icon {
  width: 17px;
  height: 17px;
}

/* Mobile Toggle Hamburger */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 38px;
  height: 38px;
  padding: 8px;
  border: 1px solid var(--border-technical);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  cursor: pointer;
}

.burger-bar {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-toggle[aria-expanded="true"] .burger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-toggle[aria-expanded="true"] .burger-bar:nth-child(2) {
  opacity: 0;
}
.mobile-toggle[aria-expanded="true"] .burger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   05. SECTION HERO
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  z-index: 1;
  padding-top: calc(var(--header-height) + 56px);
  padding-bottom: 72px;
  text-align: center;
}

.hero-container {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-technical);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 24px;
}

.status-indicator {
  width: 8px;
  height: 8px;
  background-color: var(--accent-blue);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-blue);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.badge-code {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  max-width: 960px;
  margin-bottom: 24px;
  text-wrap: balance;
}

.hero-description {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 800px;
  margin-bottom: 40px;
}

/* Groupe CTA Hero */
.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  width: 100%;
}

.btn-hero-download {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  background-color: var(--accent-blue);
  color: #ffffff;
  padding: 14px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 4px 20px rgba(46, 102, 230, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transition: all var(--transition-normal);
  text-align: left;
}

.btn-hero-download:hover {
  background-color: var(--accent-blue-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(46, 102, 230, 0.55);
}

.win-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.btn-text-wrap {
  display: flex;
  flex-direction: column;
}

.btn-label-action {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.btn-label-sub {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.8);
}

.download-arrow {
  width: 18px;
  height: 18px;
  margin-left: 4px;
  transition: transform var(--transition-fast);
}

.btn-hero-download:hover .download-arrow {
  transform: translateY(2px);
}

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background-color: var(--bg-surface);
  color: var(--text-primary);
  padding: 16px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-technical);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.btn-hero-secondary:hover {
  border-color: var(--accent-blue);
  background-color: var(--bg-surface-elevated);
  transform: translateY(-2px);
}

.windows-install-note {
  width: min(100%, 720px);
  margin: -10px auto 20px;
  padding: 2px 10px;
  color: var(--text-muted);
  border-left: 1px solid var(--border-technical);
  text-align: left;
  font-size: 0.72rem;
  line-height: 1.5;
}

.windows-install-note strong {
  color: var(--text-secondary);
  font-weight: 500;
}

.source-icon {
  width: 18px;
  height: 18px;
  color: var(--accent-blue);
}

/* Badge technique discret */
.hero-tech-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  background-color: rgba(22, 23, 26, 0.6);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-technical);
  margin-bottom: 56px;
}

.badge-item {
  display: inline-block;
}

.badge-sep {
  color: var(--accent-blue);
  opacity: 0.7;
}

/* --------------------------------------------------------------------------
   06. MOCKUP ARCHITECTURAL DU STUDIO (INTERFACE APPLICATION)
   -------------------------------------------------------------------------- */
.app-preview-frame {
  width: 100%;
  max-width: 1080px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-technical);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.03);
  overflow: hidden;
  position: relative;
  text-align: left;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.app-preview-image {
  display: block;
  width: 100%;
  height: auto;
}

.preview-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background-color: #121316;
  border-bottom: 1px solid var(--border-technical);
}

.window-controls {
  display: flex;
  gap: 6px;
}

.control-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.control-dot.close { background-color: #ff5f56; }
.control-dot.min { background-color: #ffbd2e; }
.control-dot.max { background-color: #27c93f; }

.preview-filename {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.mono-label {
  color: var(--accent-blue);
  font-weight: 600;
}

.preview-status {
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-pill {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: #10b981;
  background-color: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.fps-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
}

.preview-viewport {
  position: relative;
  background-color: #0b0c0e;
  height: 380px;
  overflow: hidden;
  display: flex;
}

.viewport-canvas-container {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.wireframe-scene {
  width: 100%;
  height: 100%;
  max-height: 380px;
}

.arch-wireframe-lines line,
.arch-wireframe-lines polygon,
.arch-wireframe-lines path {
  transition: all var(--transition-normal);
}

.viewport-hud {
  position: absolute;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  background: rgba(14, 15, 17, 0.75);
  border: 1px solid var(--border-technical);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(8px);
}

.hud-top-left {
  top: 14px;
  left: 16px;
}

.hud-top-right {
  top: 14px;
  right: 16px;
}

.axis-x { color: #f87171; }
.axis-y { color: #34d399; }
.axis-z { color: #60a5fa; }
.hud-divider { color: var(--border-technical); }

.module-active-pill {
  color: var(--accent-blue);
  font-weight: 600;
  letter-spacing: 0.05em;
}

/* Panneau inspecteur flottant dans le viewport */
.viewport-inspector-panel {
  position: absolute;
  bottom: 16px;
  right: 16px;
  width: 220px;
  background: var(--bg-surface-translucent);
  border: 1px solid var(--border-technical);
  border-radius: var(--radius-md);
  padding: 12px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 10;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-technical);
}

.panel-tag {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.panel-badge {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--accent-blue);
  background: var(--accent-blue-subtle);
  padding: 2px 4px;
  border-radius: 2px;
}

.panel-rows {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.panel-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.p-key {
  color: var(--text-muted);
}

.p-val {
  color: var(--text-primary);
  font-weight: 500;
}

.text-blue { color: #60a5fa; }
.text-accent { color: var(--accent-blue); }

.preview-statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background-color: #121316;
  border-top: 1px solid var(--border-technical);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.status-seg {
  display: flex;
  align-items: center;
  gap: 6px;
}

.indicator-active {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-blue);
}

.mono-right {
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   07. SECTION MODULES (ÉCOSYSTÈME EN 5 MODULES)
   -------------------------------------------------------------------------- */
.modules-section {
  position: relative;
  z-index: 1;
  padding: 96px 0;
  background: linear-gradient(180deg, rgba(14, 15, 17, 0) 0%, rgba(22, 23, 26, 0.4) 50%, rgba(14, 15, 17, 0) 100%);
}

.section-container {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-heading {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 64px auto;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.kicker-line {
  width: 28px;
  height: 1px;
  background-color: var(--accent-blue);
}

.kicker-text {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-blue);
  letter-spacing: 0.1em;
  font-weight: 600;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Grille CSS des 5 cartes */
.modules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* Pour que les 5 modules soient harmonieux : 
   sur grand écran, les cartes 4 et 5 s'étirent ou occupent les colonnes 
   ou on peut avoir une composition 3 + 2 cartes élégante */
.module-card:nth-child(4) {
  grid-column: span 1;
}

.module-card:nth-child(5) {
  grid-column: span 2;
}

/* Style de base d'une carte module */
.module-card {
  position: relative;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-technical);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  overflow: hidden;
}

/* Spécification stricte demandée :
   Hover : la bordure devient bleue #2e66e6 et la carte remonte légèrement de -2px */
.module-card:hover {
  border-color: var(--accent-blue);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45), 0 0 20px var(--accent-blue-glow);
}

.card-edge-glow {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-blue), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.module-card:hover .card-edge-glow {
  opacity: 1;
}

.card-top-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.module-number {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-blue);
  background: var(--accent-blue-subtle);
  border: 1px solid rgba(46, 102, 230, 0.25);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
}

.module-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.module-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background-color: #121316;
  border: 1px solid var(--border-technical);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--text-primary);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.module-card:hover .module-icon-wrapper {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

.module-image-icon {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.module-name {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.module-lead {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-blue);
  margin-bottom: 12px;
}

.module-description {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 28px;
  flex-grow: 1;
}

.card-footer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid rgba(43, 44, 50, 0.5);
}

.tech-pill {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  background-color: #121316;
  border: 1px solid var(--border-technical);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

/* Mise en avant spécifique de la carte 5 */
.module-card.card-highlighted {
  background: linear-gradient(135deg, rgba(22, 23, 26, 0.95) 0%, rgba(28, 29, 34, 0.85) 100%);
}

/* --------------------------------------------------------------------------
   08. SECTION TRANSPARENCE & OPEN-SOURCE
   -------------------------------------------------------------------------- */
.opensource-section {
  position: relative;
  z-index: 1;
  padding: 80px 0 100px 0;
}

.transparency-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-technical);
  border-radius: var(--radius-xl);
  padding: 56px 48px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.transparency-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-blue), #60a5fa, transparent);
}

.transparency-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-blue);
  background: var(--accent-blue-subtle);
  border: 1px solid rgba(46, 102, 230, 0.3);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}

.badge-icon {
  width: 15px;
  height: 15px;
}

.transparency-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3.2vw, 2.5rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 24px;
  max-width: 900px;
}

.transparency-content {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 960px;
  margin-bottom: 40px;
}

.transparency-content p {
  margin-bottom: 16px;
}

.transparency-content strong {
  color: var(--text-primary);
}

.highlight-callout {
  padding: 16px 20px;
  background-color: rgba(46, 102, 230, 0.05);
  border-left: 3px solid var(--accent-blue);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-light-dim);
}

/* Grille des engagements éthiques */
.commitments-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border-technical);
}

.commitment-item {
  display: flex;
  gap: 16px;
}

.c-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: #121316;
  border: 1px solid var(--border-technical);
  display: flex;
  align-items: center;
  justify-content: center;
}

.c-icon svg {
  width: 22px;
  height: 22px;
}

.c-text h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.c-text p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Boutons d'action finaux */
.transparency-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 32px;
  border-top: 1px solid var(--border-technical);
}

.btn-primary-action {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  background-color: var(--accent-blue);
  color: #ffffff;
  padding: 16px 32px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 4px 24px rgba(46, 102, 230, 0.45);
  transition: all var(--transition-normal);
  flex: 1 1 300px;
}

.btn-primary-action:hover {
  background-color: var(--accent-blue-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(46, 102, 230, 0.6);
}

.btn-secondary-action {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  background-color: #121316;
  color: var(--text-primary);
  padding: 16px 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-technical);
  transition: all var(--transition-fast);
  flex: 1 1 300px;
}

.btn-secondary-action:hover {
  border-color: var(--accent-blue);
  background-color: var(--bg-surface-elevated);
  transform: translateY(-2px);
}

.btn-svg {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
}

.btn-lines {
  display: flex;
  flex-direction: column;
}

.btn-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
}

.btn-sub {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.btn-primary-action .btn-sub {
  color: rgba(255, 255, 255, 0.8);
}

/* Toast de notification */
.download-toast {
  display: none;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
  padding: 16px 20px;
  background-color: #121316;
  border: 1px solid var(--accent-blue);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  animation: slide-up 0.3s ease-out forwards;
}

.download-toast.show {
  display: flex;
}

@keyframes slide-up {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.toast-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.toast-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-grow: 1;
  font-size: 0.88rem;
}

.toast-text strong {
  color: var(--text-primary);
}

.toast-text span {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.toast-close {
  color: var(--text-muted);
  font-size: 1.4rem;
  line-height: 1;
  padding: 4px;
  transition: color var(--transition-fast);
}

.toast-close:hover {
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   09. PIED DE PAGE TECHNIQUE ARCHITECTURAL
   -------------------------------------------------------------------------- */
.site-footer {
  position: relative;
  z-index: 1;
  background-color: #0b0c0e;
  border-top: 1px solid var(--border-technical);
  padding: 64px 0 32px 0;
}

.footer-container {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: 0 24px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border-technical);
  flex-wrap: wrap;
}

.footer-brand {
  max-width: 380px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.f-icon {
  width: 24px;
  height: 24px;
  object-fit: contain;
}

.f-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-primary);
}

.f-tagline {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer-links-group {
  display: flex;
  gap: 64px;
  flex-wrap: wrap;
}

.f-col {
  display: flex;
  flex-direction: column;
}

.f-col-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-blue);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.f-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.f-col a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.f-col a:hover {
  color: var(--text-primary);
}

.donation-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.donation-icon {
  width: 16px;
  height: 16px;
  color: var(--accent-blue);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

.system-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.meta-tag {
  letter-spacing: 0.05em;
}

.meta-sep {
  color: var(--border-technical);
}

/* --------------------------------------------------------------------------
   10. EFFET DE RÉVÉLATION AU DÉFILEMENT (DATA-REVEAL)
   -------------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   11. RESPONSIVE DESIGN (TABLETTES & MOBILES)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .modules-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .module-card:nth-child(4),
  .module-card:nth-child(5) {
    grid-column: span 1;
  }

  .commitments-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .mobile-toggle {
    display: flex;
  }

  /* Menu Mobile Déroulant */
  .main-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-technical);
    padding: 24px;
    flex-direction: column;
    align-items: flex-start;
    display: none;
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.6);
  }

  .main-nav.open {
    display: flex;
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    width: 100%;
  }

  .nav-link {
    font-size: 1.05rem;
    width: 100%;
    padding: 8px 0;
  }

  .btn-primary-nav,
  .donation-nav-link {
    padding: 6px 12px;
    font-size: 0.8rem;
  }

  .hero-section {
    padding-top: calc(var(--header-height) + 36px);
    padding-bottom: 48px;
  }

  @media (max-width: 480px) {
    .header-container {
      padding: 0 8px;
    }

    .brand-logo {
      gap: 4px;
    }

    .brand-icon {
      width: 22px;
      height: 22px;
    }

    .brand-name {
      font-size: 0.72rem;
      gap: 3px;
      letter-spacing: 0.04em;
    }

    .brand-sub {
      display: none;
    }

    .nav-actions {
      gap: 4px;
    }

    .language-button {
      padding: 4px;
      font-size: 0.62rem;
    }

    .btn-ghost-nav {
      display: none;
    }

    .btn-primary-nav,
    .donation-nav-link {
      padding: 5px 6px;
      font-size: 0.72rem;
    }

    .donation-nav-link {
      gap: 4px;
    }

    .donation-nav-link .donation-icon {
      width: 15px;
      height: 15px;
    }

    .mobile-toggle {
      width: 34px;
      height: 34px;
    }
  }

  @media (max-width: 360px) {
    .brand-icon {
      display: none;
    }

    .donation-nav-link span {
      display: none;
    }
  }

  .hero-cta-group {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-hero-download,
  .btn-hero-secondary {
    justify-content: center;
  }

  .modules-grid {
    grid-template-columns: 1fr;
  }

  .module-card:nth-child(4),
  .module-card:nth-child(5) {
    grid-column: span 1;
  }

  .transparency-card {
    padding: 32px 20px;
  }

  .transparency-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .footer-top {
    flex-direction: column;
    gap: 36px;
  }

  .footer-links-group {
    gap: 40px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .viewport-inspector-panel {
    display: none; /* Simplifier sur petits écrans pour laisser respirer la scène 3D */
  }

  .viewport-hud {
    font-size: 0.62rem;
    padding: 3px 6px;
  }
}