:root {--ink-950: #0B1D2E;--ink-900: #122A40;--ink-800: #1C3A55;--ink-700: #2D4E6B;--ink-600: #47637F;--ink-500: #647E98;--ink-400: #8CA2B7;--ink-300: #B5C6D5;--ink-200: #D7E1EA;--ink-100: #E9F0F5;--ink-50: #F4F8FA;--accent-700: #0A4FB5;--accent-600: #0B5FD0;--accent-500: #1F74E6;--accent-400: #549AF2;--accent-300: #8FC0F8;--accent-100: #D8E8FC;--accent-50: #EDF4FE;--green-700: #0B7A4B;--green-600: #0D9160;--green-50: #EFFBF5;--alert-600: #B42318;--alert-50: #FEF3F2;--paper: var(--ink-50);--font-display: 'Sora', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;--font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: 'JetBrains Mono', monospace;--header-height: 70px;--section-padding: 6rem 2rem;--container-max-width: 1200px;--shadow-card: 0 1px 2px rgba(11, 29, 46, 0.05);--shadow-card-hover: 0 8px 22px rgba(11, 29, 46, 0.09);--transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);}* {margin: 0;padding: 0;box-sizing: border-box;}html {scroll-behavior: smooth;scroll-padding-top: calc(var(--header-height) + 1rem);}body {font-family: var(--font-primary);line-height: 1.6;color: var(--ink-800);background: #FFFFFF;font-size: 16px;overflow-x: hidden;overflow-wrap: break-word;}::selection {background: var(--accent-100);color: var(--ink-900);}:focus-visible {outline: 3px solid var(--accent-500);outline-offset: 2px;border-radius: 4px;}img, video {max-width: 100%;}sup {line-height: 0;}html:not([lang="fr"]) .fr, html[lang="fr"] .en {display: none !important;}.overline {font-family: var(--font-mono);font-size: 0.74rem;font-weight: 500;letter-spacing: 0.07em;text-transform: uppercase;color: var(--ink-500);}.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;}.no-select {-webkit-user-select: none;-moz-user-select: none;-ms-user-select: none;user-select: none;}.container {width: 100%;max-width: var(--container-max-width);margin: 0 auto;padding: 0 2rem;}.skip-link {position: absolute;top: -100%;left: 1rem;padding: 0.75rem 1.25rem;background: var(--accent-600);color: white;font-weight: 600;text-decoration: none;border-radius: 0 0 8px 8px;z-index: 2000;transition: top 0.2s ease;}.skip-link:focus {top: 0;}header {position: fixed;top: 0;left: 0;right: 0;height: var(--header-height);display: flex;justify-content: center;align-items: center;background: rgba(255, 255, 255, 0.92);backdrop-filter: blur(16px);border-bottom: 1px solid var(--ink-200);z-index: 1000;transition: var(--transition-smooth);}.header-content {display: flex;align-items: center;justify-content: space-between;height: 100%;width: 100%;gap: 1rem;}.logo {padding: 0.25rem 0.5rem;border-radius: 10px;font-family: var(--font-display);font-size: 1.4rem;font-weight: 700;letter-spacing: -0.01em;color: var(--ink-900);text-decoration: none;user-select: none;transition: var(--transition-smooth);}.logo:hover {color: var(--accent-700);}.lang-selector {padding: 0.5rem 0.9rem;border: 1px solid var(--ink-300);border-radius: 8px;background: white;color: var(--ink-800);font-family: var(--font-primary);cursor: pointer;user-select: none;transition: var(--transition-smooth);}.lang-selector:hover {border-color: var(--accent-500);}@media (max-width: 480px) {.container {padding: 0 1rem;}}@media (prefers-reduced-motion: reduce) {*, *::before, *::after {animation-duration: 0.01ms !important;animation-iteration-count: 1 !important;transition-duration: 0.01ms !important;}html {scroll-behavior: auto;}}.back-to-top {position: fixed;right: 1.5rem;bottom: 1.5rem;z-index: 900;width: 44px;height: 44px;display: flex;align-items: center;justify-content: center;border-radius: 50%;border: 1px solid var(--ink-300);background: #FFFFFF;color: var(--ink-700);cursor: pointer;box-shadow: 0 6px 18px rgba(11, 29, 46, 0.14);opacity: 0;visibility: hidden;transform: translateY(8px);transition: var(--transition-smooth);}.back-to-top.visible {opacity: 1;visibility: visible;transform: none;}.back-to-top:hover {border-color: var(--accent-500);color: var(--accent-700);}.back-to-top svg {width: 20px;height: 20px;}.footer {background: var(--ink-950);color: var(--ink-300);padding: 3.5rem 2rem 2rem;}.footer-grid {display: grid;grid-template-columns: 2fr 1fr 1fr 1fr;gap: 2.5rem;margin-bottom: 2.5rem;}.footer-logo {font-family: var(--font-display);font-size: 1.3rem;font-weight: 700;color: #FFFFFF;margin-bottom: 0.75rem;}.footer-tagline {font-size: 0.9rem;line-height: 1.6;color: var(--ink-400);max-width: 30ch;}.footer-col {display: flex;flex-direction: column;gap: 0.65rem;align-items: flex-start;}.footer-col-title {font-family: var(--font-mono);font-size: 0.72rem;font-weight: 500;letter-spacing: 0.07em;text-transform: uppercase;color: var(--ink-400);margin-bottom: 0.35rem;}.footer-col a, .footer-link-button {background: none;border: none;padding: 0;font-family: var(--font-primary);font-size: 0.92rem;color: var(--ink-300);text-decoration: none;cursor: pointer;transition: var(--transition-smooth);}.footer-col a:hover, .footer-link-button:hover {color: #FFFFFF;}.footer-bottom {border-top: 1px solid rgba(255, 255, 255, 0.08);padding-top: 1.5rem;}.footer-copyright {font-size: 0.85rem;color: var(--ink-400);}@media (max-width: 768px) {.footer-grid {grid-template-columns: 1fr 1fr;}.footer-brand {grid-column: 1 / -1;}}@media (max-width: 480px) {.footer-grid {grid-template-columns: 1fr;}}