:root {
      --color-primary: #1f1f1f;
      --color-secondary: #ffffff;
      --color-accent: #ffc444;
      --color-text: #4a4a4a;
      --color-background-light: #f9fafb;
      --font-body: 'Open Sans', sans-serif;
      --font-heading: 'Roboto Slab', serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-body);
      color: var(--color-text);
      line-height: 1.7;
      background-color: var(--color-secondary);
    }

    h1,
    h2,
    h3,
    h4,
    h5 {
      font-family: var(--font-heading);
      color: var(--color-primary);
      font-weight: 700;
      line-height: 1.2;
    }

    h4 {
      text-transform: uppercase;
    }

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

    a:hover {
      text-decoration: underline;
    }

    .container {
      max-width: 1100px;
      margin: 0 auto;
      padding: 0 20px;
    }

    section {
      padding: 70px 0;
      scroll-margin-top: 110px;
    }

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

    /* HEADER */
    .site-header {
      padding: 15px 0;
      background-color: var(--color-secondary);
      border-bottom: 1px solid #eee;
    }

    .site-header .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .logo img {
      max-height: 72px;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .language-switcher {
      display: flex;
      align-items: center;
      margin-left: 20px;
    }

    .language-switcher select {
      background-color: transparent;
      border: 1px solid #dcdcdc;
      border-radius: 4px;
      padding: 6px 10px;
      font-family: var(--font-body);
      font-size: 0.95rem;
      color: var(--color-text);
      cursor: pointer;
    }

    .language-switcher select:focus {
      outline: 2px solid var(--color-accent);
      outline-offset: 2px;
    }

    .main-nav ul {
      display: flex;
      list-style: none;
      gap: 30px;
    }

    .main-nav a {
      color: var(--color-text);
      text-decoration: none;
      font-weight: 700;
      transition: color 0.3s;
    }

    .main-nav a:hover,
    .main-nav .current a {
      color: var(--color-accent);
    }

    .button {
      background-color: var(--color-accent);
      color: var(--color-primary);
      padding: 12px 24px;
      border-radius: 5px;
      font-weight: 700;
      text-decoration: none;
      transition: background-color 0.3s, box-shadow 0.3s, transform 0.2s;
      border: 2px solid transparent;
      outline-offset: 2px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
    }

    .button:focus {
      outline: 2px solid var(--color-accent);
    }

    .button:hover {
      background-color: #e9b23e;
      text-decoration: none;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    }

    .button:active {
      transform: translateY(1px);
    }

    .button--ghost {
      background-color: transparent;
      color: var(--color-secondary);
      border-color: var(--color-secondary);
    }

    .button--ghost:hover,
    .button--ghost:focus {
      background-color: rgba(255, 255, 255, 0.15);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      outline-offset: 2px;
    }

    .menu-toggle:focus {
      outline: 2px solid var(--color-accent);
    }

    /* HERO CAROUSEL */
    .hero {
      position: relative;
      color: var(--color-secondary);
      text-align: left;
      padding: 120px 0;
      display: flex;
      align-items: center;
      overflow: hidden;
      height: 600px;
    }

    .carousel-container {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: 1;
    }

    .carousel-slide {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-size: cover;
      background-position: center;
      opacity: 0;
      transition: opacity 1.5s ease-in-out;
      z-index: 1;
    }

    .carousel-slide.active {
      opacity: 1;
      z-index: 2;
    }

    .hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-color: rgba(0, 0, 0, 0.4);
      z-index: 3;
    }

    .hero-content {
      position: relative;
      z-index: 4;
      max-width: 700px;
    }

    .hero h1 {
      color: var(--color-secondary);
      font-size: clamp(2.8rem, 6vw, 4rem);
      margin-bottom: 20px;
      text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.5);
    }

    .hero p {
      font-size: 1.25rem;
      font-weight: 500;
      background-color: rgba(0, 0, 0, 0.4);
      padding: 10px 15px;
      border-radius: 5px;
      display: inline-block;
      margin-top: 10px;
    }

    .hero a {
      color: var(--color-secondary);
      font-weight: 700;
    }

    .carousel-nav {
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      width: 100%;
      display: flex;
      justify-content: space-between;
      padding: 0 20px;
      z-index: 5;
    }

    .carousel-nav button {
      background-color: rgba(0, 0, 0, 0.3);
      border: none;
      color: white;
      font-size: 2rem;
      cursor: pointer;
      border-radius: 50%;
      width: 50px;
      height: 50px;
      display: flex;
      justify-content: center;
      align-items: center;
      transition: background-color 0.3s;
      outline-offset: 2px;
    }

    .carousel-nav button:focus {
      outline: 2px solid var(--color-accent);
    }

    .carousel-nav button:hover {
      background-color: rgba(0, 0, 0, 0.6);
    }

    .carousel-dots {
      position: absolute;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      display: flex;
      gap: 10px;
      z-index: 5;
    }

    .carousel-dot {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background-color: rgba(255, 255, 255, 0.5);
      cursor: pointer;
      transition: background-color 0.3s;
    }

    .carousel-dot.active {
      background-color: var(--color-secondary);
    }

    /* SECTIONS */
    .services {
      background-color: var(--color-background-light);
    }

    #about {
      background-color: var(--color-secondary);
    }

    section h2 {
      text-align: center;
      font-size: 2.8rem;
      margin-bottom: 50px;
    }

    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
      gap: 30px;
    }

    .service-item {
      display: flex;
      align-items: flex-start;
      gap: 20px;
    }

    .service-item .icon {
      font-size: 2rem;
      color: var(--color-accent);
      margin-top: 5px;
      width: 40px;
      text-align: center;
    }

    .service-item-content h3 {
      font-size: 1.3rem;
      margin-bottom: 5px;
      color: var(--color-primary);
      font-family: var(--font-body);
      font-weight: 700;
      text-transform: none;
    }

    .service-item-content p {
      font-size: 1rem;
      line-height: 1.6;
    }

    .about-content {
      max-width: 800px;
      margin: 0 auto;
      text-align: center;
    }

    .about-content h4 {
      font-size: 1.5rem;
      margin-top: 40px;
      margin-bottom: 10px;
    }

    .about-content p {
      font-size: 1.1rem;
      line-height: 1.8;
    }

    .about-content a {
      font-weight: 700;
    }

    /* FOOTER */
    .site-footer {
      background-color: var(--color-primary);
      color: rgba(255, 255, 255, 0.8);
      padding: 50px 0;
      font-size: 0.9rem;
    }

    .footer-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 30px;
    }

    .footer-column {
      flex: 1;
      min-width: 220px;
    }

    .footer-column h5 {
      color: var(--color-secondary);
      margin-bottom: 15px;
      font-size: 1.2rem;
      font-family: var(--font-body);
      font-weight: 700;
      text-transform: uppercase;
    }

    .footer-column ul {
      list-style: none;
    }

    .footer-column li {
      margin-bottom: 10px;
    }

    .footer-column a {
      color: rgba(255, 255, 255, 0.8);
    }

    .footer-column a:hover {
      color: var(--color-secondary);
    }

    .social-links a {
      font-size: 1.5rem;
      margin-right: 15px;
    }

    .footer-bottom {
      text-align: center;
      margin-top: 40px;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      font-size: 0.85rem;
      color: rgba(255, 255, 255, 0.7);
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    #load-time {
      margin-left: 10px;
      font-size: 0.75rem;
      color: rgba(255, 255, 255, 0.5);
      font-style: italic;
    }

    #load-time::before {
      content: '|';
      margin-right: 10px;
      color: rgba(255, 255, 255, 0.35);
    }

    /* RESPONSIVE */
    @media (max-width: 768px) {
      h1 {
        font-size: 2.5rem;
      }

      h2 {
        font-size: 2rem;
      }

      .menu-toggle {
        display: block;
        z-index: 1001;
      }

      .language-switcher {
        margin-left: 0;
        margin-right: 10px;
      }

      .main-nav {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: var(--color-secondary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        z-index: 1000;
      }

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

      .main-nav ul {
        flex-direction: column;
        text-align: center;
        gap: 20px;
      }

      .main-nav ul li a {
        font-size: 1.5rem;
      }

      .main-nav .button {
        margin-top: 20px;
        font-size: 1.2rem;
      }

      .hero {
        text-align: center;
      }

      .hero-content {
        padding: 0 15px;
      }

      .carousel-nav button {
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
      }

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

      .footer-grid {
        flex-direction: column;
        text-align: center;
      }
    }

    /* BONUS : Ultra-optimisé Mobile (<600px) */
    @media (max-width: 600px) {
      .hero {
        height: auto;
        min-height: 65vh;
        padding: 60px 0 32px 0;
        text-align: center;
        display: flex;
        align-items: flex-end;
      }

      .hero-content {
        padding: 0 10px;
      }

      .hero h1 {
        font-size: 1.3rem;
        margin-bottom: 0.8rem;
        line-height: 1.1;
      }

      .hero p {
        font-size: 1rem;
        margin-bottom: 0.6rem;
        padding: 7px 10px;
      }

      .carousel-nav button {
        width: 34px;
        height: 34px;
        font-size: 1.3rem;
      }

      .carousel-dots {
        bottom: 12px;
      }

      section {
        padding: 28px 0;
        scroll-margin-top: 70px;
      }

      h2 {
        font-size: 1.3rem !important;
        margin-bottom: 18px !important;
      }

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

      .service-item .icon {
        font-size: 1.5rem;
        width: 32px;
      }

      .about-content h4 {
        font-size: 1.1rem;
        margin-top: 18px;
        margin-bottom: 8px;
      }

      .about-content p {
        font-size: 0.98rem;
      }

      .site-footer {
        padding: 24px 0;
        font-size: 1rem;
      }

      .footer-grid {
        flex-direction: column;
        gap: 8px;
        text-align: center;
      }

      .footer-column {
        min-width: unset;
        margin-bottom: 10px;
      }

      .footer-bottom {
        margin-top: 20px;
        padding-top: 10px;
      }
    }