:root {
  /* ===== Tokens Crypto Forensics Europe v2 ===== */
  --color-primary: #0D1B2E;
  --color-primary-soft: #16283F;
  --color-on-primary: #FFFFFF;
  --color-accent: #B99A5B;
  --color-accent-dark: #A58748;
  --color-on-accent: #0D1B2E;
  --color-accent-soft: #F6EFDF;
  --color-bg: #EEF1F5;
  --color-surface: #FFFFFF;
  --color-text: #232F45;
  --color-text-secondary: #5A6A82;
  --color-text-muted: #7B8799;
  --color-border: #DDE3EC;
  --color-border-strong: #B5C1D3;
  --color-error: #B3261E;
  --color-success: #0E7250;
  --color-focus: #2563EB;
  --color-link: #8A6D2F;
  --color-link-hover: #71571F;
  --color-warning-bg: #FFFDF6;
  --color-warning-border: #EAD9AE;
  --color-warning-text: #5E5030;

  /* Hero / overlay */
  --hero-overlay-light: rgba(13, 27, 46, 0.82);
  --hero-overlay-dark: rgba(13, 27, 46, 0.94);
  --hero-text: #F4F6FA;

  --font-sans: Arial, Helvetica, sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-xs: 0 1px 2px rgba(13, 27, 46, .05);
  --shadow-sm: 0 2px 6px rgba(13, 27, 46, .06);
  --shadow-md: 0 8px 24px rgba(13, 27, 46, .10);
  --shadow-lg: 0 20px 48px rgba(13, 27, 46, .14);
  --focus-ring: 0 0 0 3px rgba(37, 99, 235, 0.45);
  --transition: 200ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-link);
  text-decoration: none;
}

a:hover {
  color: var(--color-link-hover);
}

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: 4px;
}

/* ===== Accessibilité : lien d'évitement ===== */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--color-primary);
  color: var(--color-on-primary);
  padding: 12px 20px;
  font-weight: bold;
  border-radius: 0 0 8px 0;
}

.skip-link:focus {
  left: 0;
  color: var(--color-on-primary);
}

/* ===== NAVIGATION ===== */
.site-nav {
  background-color: var(--color-primary);
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-brand {
  font-family: var(--font-serif);
  color: var(--color-on-primary);
  font-size: 24px;
  letter-spacing: 1.5px;
  line-height: 1.2;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-label {
  color: #D9DFEA;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.nav-cta {
  background-color: var(--color-accent);
  color: var(--color-on-accent);
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: bold;
  letter-spacing: 0.5px;
  transition: background-color var(--transition);
  cursor: pointer;
}

.nav-cta:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-on-accent);
}

/* ===== HERO ===== */
.landing-hero {
  background-color: var(--color-primary);
  background-image: linear-gradient(var(--hero-overlay-light), var(--hero-overlay-dark)), url('/images/hero-network.webp');
  background-size: cover;
  background-position: center;
  padding: 110px 40px 96px;
  border-bottom: 1px solid var(--color-border);
}

.hero-container {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  animation: hero-in 600ms ease-out both;
}

@keyframes hero-in {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-eyebrow {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--color-accent);
  font-weight: bold;
  margin-bottom: 20px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 44px;
  line-height: 1.25;
  color: var(--hero-text);
  font-weight: normal;
  margin-bottom: 24px;
  text-wrap: balance;
}

.hero-subtitle {
  font-size: 18px;
  line-height: 1.7;
  color: #D9DFEA;
  margin-bottom: 36px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: inline-block;
  background-color: var(--color-accent);
  color: var(--color-on-accent);
  padding: 20px 48px;
  border-radius: var(--radius-md);
  font-size: 17px;
  font-weight: bold;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
  transition: background-color var(--transition), transform var(--transition);
  cursor: pointer;
}

.hero-cta:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-on-accent);
  transform: translateY(-1px);
}

.hero-mention {
  font-size: 13px;
  color: #94A3B8;
}

/* Badges de garantie sous le CTA */
.hero-badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px 32px;
  margin-top: 28px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #E5E9F1;
  font-size: 14px;
}

.hero-badge svg {
  width: 22px;
  height: 22px;
  color: var(--color-accent);
  flex-shrink: 0;
}

/* ===== SECTIONS ===== */
.landing-section {
  padding: 84px 40px;
}

.landing-section--alt {
  background-color: var(--color-surface);
}

.section-container {
  max-width: 1100px;
  margin: 0 auto;
}

.section-eyebrow {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--color-accent);
  font-weight: bold;
  margin-bottom: 16px;
  text-align: center;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 34px;
  line-height: 1.3;
  color: var(--color-primary);
  font-weight: normal;
  margin-bottom: 16px;
  text-align: center;
  text-wrap: balance;
}

.section-subtitle {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

/* ===== GRILLE MISSION / GARANTIES ===== */
.landing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.landing-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-xs);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

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

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent-soft);
  border-radius: var(--radius-sm);
  color: var(--color-accent-dark);
  margin-bottom: 24px;
}

.card-icon svg {
  width: 26px;
  height: 26px;
}

.card-title {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--color-primary);
  margin-bottom: 14px;
  font-weight: normal;
}

.card-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
}

/* ===== TYPES DE FRAUDES ===== */
.frauds-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 40px;
  max-width: 760px;
  margin: 0 auto;
}

.fraud-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--color-text);
}

.fraud-item svg {
  width: 20px;
  height: 20px;
  color: var(--color-success);
  flex-shrink: 0;
  margin-top: 2px;
}

.fraud-note {
  margin-top: 28px;
  text-align: center;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ===== TIMELINE ===== */
.landing-timeline {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
}

.landing-timeline::before {
  content: '';
  position: absolute;
  left: 28px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--color-border-strong);
}

.landing-step {
  position: relative;
  padding-left: 84px;
  padding-bottom: 48px;
}

.landing-step:last-child {
  padding-bottom: 0;
}

.step-number {
  position: absolute;
  left: 0;
  top: 0;
  width: 58px;
  height: 58px;
  background-color: var(--color-primary);
  color: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: bold;
  border: 4px solid var(--color-surface);
  box-shadow: 0 0 0 2px var(--color-border-strong);
}

.step-title {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--color-primary);
  margin-bottom: 10px;
  font-weight: normal;
}

.step-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
}

/* ===== GRILLE 2 COLONNES (méthodologie / à propos) ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
}

.about-grid--reversed .about-image-wrapper {
  order: 2;
}

.about-grid--reversed .about-content {
  order: 1;
}

.about-image-wrapper img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  display: block;
}

.about-content {
  text-align: left;
}

.about-content .section-eyebrow,
.about-content .about-title,
.about-content .about-text,
.about-content .section-title,
.about-content .section-subtitle {
  text-align: left;
  margin-left: 0;
  margin-right: 0;
}

.about-title {
  font-family: var(--font-serif);
  font-size: 30px;
  color: var(--color-primary);
  margin-bottom: 20px;
  font-weight: normal;
}

.about-text {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 28px;
}

.about-address {
  display: inline-block;
  background-color: var(--color-bg);
  padding: 24px 40px;
  border-radius: var(--radius-md);
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text);
  border-left: 4px solid var(--color-accent);
  text-align: left;
}

.about-address strong {
  color: var(--color-primary);
  display: block;
  margin-bottom: 6px;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 2px;
}

/* ===== RÉASSURANCE ===== */
.reassurance-box {
  max-width: 820px;
  margin: 0 auto;
  background-color: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-lg);
  padding: 40px 44px;
  text-align: center;
  box-shadow: var(--shadow-xs);
}

.reassurance-image {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--color-accent);
  margin: 0 auto 24px;
  display: block;
  box-shadow: var(--shadow-sm);
}

.reassurance-title {
  font-family: var(--font-serif);
  font-size: 24px;
  color: var(--color-warning-text);
  margin-bottom: 16px;
  font-weight: normal;
}

.reassurance-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-warning-text);
}

/* ===== CTA FINAL ===== */
.landing-cta-final {
  background-color: var(--color-primary);
  padding: 84px 40px;
  text-align: center;
  background-image: linear-gradient(var(--hero-overlay-light), var(--hero-overlay-dark)), url('/images/hero-network.webp');
  background-size: cover;
  background-position: center;
}

.cta-final-container {
  max-width: 720px;
  margin: 0 auto;
}

.cta-final-title {
  font-family: var(--font-serif);
  font-size: 34px;
  color: #FFFFFF;
  margin-bottom: 20px;
  font-weight: normal;
  line-height: 1.3;
  text-wrap: balance;
}

.cta-final-text {
  font-size: 17px;
  line-height: 1.7;
  color: #D9DFEA;
  margin-bottom: 36px;
}

.cta-final-button {
  display: inline-block;
  background-color: #FFFFFF;
  color: var(--color-primary);
  padding: 20px 48px;
  border-radius: var(--radius-md);
  font-size: 17px;
  font-weight: bold;
  letter-spacing: 0.5px;
  transition: background-color var(--transition), transform var(--transition);
  cursor: pointer;
}

.cta-final-button:hover {
  background-color: #F2F4F8;
  color: var(--color-primary);
  transform: translateY(-2px);
}

.cta-final-mention {
  margin-top: 20px;
  font-size: 13px;
  color: #94A3B8;
}

/* ===== FOOTER ===== */
.landing-footer {
  background-color: #F7F9FB;
  padding: 48px 40px 32px;
  border-top: 1px solid var(--color-border);
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
}

.footer-brand {
  font-family: var(--font-serif);
  font-size: 20px;
  color: var(--color-primary);
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.footer-description {
  font-size: 13px;
  line-height: 22px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  max-width: 620px;
}

.footer-divider {
  border-top: 1px solid var(--color-border);
  margin: 24px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 24px;
}

.footer-block-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-primary);
  font-weight: bold;
  margin-bottom: 8px;
}

.footer-block-text {
  font-size: 13px;
  line-height: 20px;
  color: var(--color-text-muted);
}

.footer-block-text a {
  color: var(--color-link);
  text-decoration: underline;
}

.footer-legal {
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links {
  font-size: 12px;
  color: var(--color-text-muted);
}

.footer-links a {
  color: var(--color-link);
  text-decoration: underline;
  margin-right: 16px;
}

.footer-copyright {
  font-size: 11px;
  color: #94A3B8;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .landing-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about-grid--reversed .about-image-wrapper,
  .about-grid--reversed .about-content {
    order: 0;
  }

  .about-content {
    text-align: center;
  }

  .about-content .section-eyebrow,
  .about-content .about-title,
  .about-content .about-text,
  .about-content .section-title,
  .about-content .section-subtitle {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
  }

  .about-address {
    text-align: left;
  }
}

@media (max-width: 640px) {
  .site-nav {
    padding: 16px 20px;
  }

  .nav-brand {
    font-size: 20px;
  }

  .nav-label {
    display: none;
  }

  .landing-hero,
  .landing-section,
  .landing-cta-final,
  .landing-footer {
    padding-left: 20px;
    padding-right: 20px;
  }

  .landing-hero {
    padding-top: 72px;
    padding-bottom: 64px;
  }

  .hero-title {
    font-size: 30px;
    line-height: 1.3;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .hero-cta,
  .cta-final-button {
    padding: 18px 32px;
    font-size: 15px;
    width: 100%;
  }

  .hero-badges {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }

  .section-title,
  .cta-final-title {
    font-size: 26px;
  }

  .about-title {
    font-size: 24px;
  }

  .landing-timeline::before {
    left: 20px;
  }

  .landing-step {
    padding-left: 58px;
  }

  .step-number {
    width: 44px;
    height: 44px;
    font-size: 18px;
  }

  .step-title {
    font-size: 19px;
  }

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

  .reassurance-box {
    padding: 28px 20px;
  }

  .reassurance-image {
    width: 110px;
    height: 110px;
  }

  .reassurance-title {
    font-size: 20px;
  }

  .about-address {
    padding: 20px 24px;
    width: 100%;
  }

  .landing-footer {
    padding: 36px 20px 24px;
  }

  .footer-legal {
    flex-direction: column;
    gap: 12px;
  }
}

/* Respect du mouvement réduit */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}