/* Variables pour thème */
    :root {
      --primary-bg: #4c1d95;
      --secondary-bg: #6b21a8;
      --glow-color: #7c3aed;
      --text-color: #ffffff;
      --button-bg: #2563eb;
      --button-hover: #3b82f6;
      --alert-bg: #ef4444;
      --circle-bg: #87CEEB;
      --circle-hover: #ADD8E6;
    }

    /* Style général */
    body, html {
      margin: 0;
      padding: 0;
      height: 100vh;
      width: 100vw;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      background-image: url('https://i.ibb.co/Jwh6jc8y/20250520-121247.png');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      font-family: 'Inter', sans-serif;
      overflow: hidden;
      position: relative;
    }

    /* Écran de chargement */
    #loading, #prediction-loading {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.85);
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      z-index: 1000;
      transition: opacity 0.5s ease;
    }

    .loader {
      display: flex;
      gap: 1.2vmin;
      margin-bottom: 2vmin;
    }

    .loader-bar {
      width: 1vmin;
      height: 4vmin;
      background: var(--text-color);
      border-radius: 0.5vmin;
      animation: scale 1.2s ease-in-out infinite;
    }

    .loader-bar:nth-child(2) { animation-delay: 0.2s; }
    .loader-bar:nth-child(3) { animation-delay: 0.4s; }

    @keyframes scale {
      0%, 100% { transform: scaleY(1); }
      50% { transform: scaleY(1.8); }
    }

    .loading-text {
      color: var(--text-color);
      font-size: 2.5vmin;
      font-weight: 500;
      letter-spacing: 0.1vmin;
    }

    /* Contenu principal */
    #content {
      display: none;
      text-align: center;
      position: relative;
      z-index: 1;
      width: 100%;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      opacity: 0;
      transition: opacity 0.5s ease;
    }

    #content.visible {
      display: flex;
      opacity: 1;
    }

    /* Logo */
    .logo {
      position: absolute;
      top: 5vmin;
      left: 50%;
      transform: translateX(-50%);
      width: 48vmin;
      max-width: 360px;
      height: auto;
      filter: drop-shadow(0 0.2vmin 0.5vmin rgba(0, 0, 0, 0.4));
      z-index: 10;
    }

    .logo--ios {
      width: 54vmin;
      max-width: 420px;
      top: 6vmin;
    }

    /* Alerte */
    #alertBox {
      position: fixed;
      top: 16vmin;
      left: 50%;
      transform: translateX(-50%);
      background: linear-gradient(135deg, var(--alert-bg), #b91c1c);
      color: var(--text-color);
      padding: 2vmin 4vmin;
      border-radius: 1vmin;
      box-shadow: 0 0.4vmin 1.2vmin rgba(0, 0, 0, 0.3);
      font-size: 2.8vmin;
      font-weight: 600;
      display: none;
      animation: slideIn 0.5s ease;
      z-index: 999;
      max-width: 80%;
      text-align: center;
    }

    @keyframes slideIn {
      from { transform: translate(-50%, -2vmin); opacity: 0; }
      to { transform: translate(-50%, 0); opacity: 1; }
    }

    /* Conteneur des carrés */
    .circle-container {
      display: flex;
      flex-direction: column;
      gap: 2vmin;
      margin-top: 20vmin;
      max-height: 58vh;
      overflow-y: auto;
      padding: 2vmin;
      scrollbar-width: none;
      width: 90%;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 1.5vmin;
      box-shadow: 0 0.5vmin 1vmin rgba(0, 0, 0, 0.2), 0 0 2vmin var(--glow-color);
    }

    .circle-container::-webkit-scrollbar {
      display: none;
    }

    .circle-row {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 1.8vmin;
      position: relative;
      animation: fadeInRow 0.5s ease;
    }

    @keyframes fadeInRow {
      from { opacity: 0; transform: translateY(1vmin); }
      to { opacity: 1; transform: translateY(0); }
    }

    .circle {
      width: 9vmin;
      height: 9vmin;
      min-width: 54px;
      min-height: 54px;
      background: var(--circle-bg);
      border: 0.4vmin solid var(--text-color);
      border-radius: 0;
      box-shadow: 0 0.3vmin 0.8vmin rgba(0, 0, 0, 0.2);
      display: flex;
      justify-content: center;
      align-items: center;
      overflow: hidden;
      transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
    }

    .circle--ios {
      width: 10.5vmin;
      height: 10.5vmin;
      min-width: 60px;
      min-height: 60px;
    }

    .circle:hover {
      transform: scale(1.15);
      border-color: #60a5fa;
      background: var(--circle-hover);
      box-shadow: 0 0 1vmin var(--glow-color);
    }

    .circle img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: none;
    }

    .row-number {
      font-size: 2.5vmin;
      font-weight: 600;
      color: var(--text-color);
      position: absolute;
      right: -25vmin;
      top: 50%;
      transform: translateY(-50%);
      background: rgba(0, 0, 0, 0.6);
      padding: 0.5vmin 1vmin;
      border-radius: 1vmin;
    }

    /* Boutons */
    .buttons {
      position: fixed;
      bottom: 12vmin;
      display: flex;
      justify-content: center;
      gap: 2.5vmin;
      z-index: 10;
      width: 100%;
      padding: 0 2vmin;
      box-sizing: border-box;
    }

    .button {
      padding: 2vmin 5.5vmin;
      font-size: 2.6vmin;
      font-weight: 600;
      color: var(--text-color);
      background: var(--button-bg);
      border: none;
      border-radius: 0.8vmin;
      box-shadow: 0 0.2vmin 0.6vmin rgba(0, 0, 0, 0.2), 0 0 1vmin var(--glow-color);
      cursor: pointer;
      transition: background 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 1vmin;
      max-width: 35%;
      flex: 1;
      letter-spacing: 0.05vmin;
    }

    .button:hover {
      background: var(--button-hover);
      transform: translateY(-0.2vmin);
      box-shadow: 0 0.4vmin 0.8vmin rgba(0, 0, 0, 0.3), 0 0 1.5vmin var(--glow-color);
    }

    .button:disabled {
      background: #6b7280;
      color: #d1d5db;
      cursor: not-allowed;
      transform: none;
      box-shadow: none;
      opacity: 0.7;
    }

    .button-icon {
      width: 4vmin;
      height: 4vmin;
    }

    /* Bouton Retour */
    .back-button {
      position: fixed;
      bottom: 4vmin;
      left: 2vmin;
      padding: 2vmin 4vmin;
      font-size: 2.6vmin;
      font-weight: 600;
      color: var(--text-color);
      background: #dc2626;
      border: none;
      border-radius: 0.8vmin;
      box-shadow: 0 0.2vmin 0.6vmin rgba(0, 0, 0, 0.2);
      cursor: pointer;
      transition: background 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 1vmin;
      z-index: 10;
    }

    .back-button:hover {
      background: #ef4444;
      transform: translateY(-0.2vmin);
      box-shadow: 0 0.4vmin 0.8vmin rgba(0, 0, 0, 0.3);
    }

    /* Sélecteur de langue */
    .language-toggle {
      position: fixed;
      top: 3vmin;
      right: 2vmin;
      z-index: 10;
    }

    .language-toggle select {
      padding: 1vmin;
      font-size: 2vmin;
      background: rgba(255, 255, 255, 0.1);
      color: var(--text-color);
      border: 0.2vmin solid var(--text-color);
      border-radius: 0.5vmin;
      cursor: pointer;
      transition: border-color 0.3s ease;
    }

    .language-toggle select:focus {
      outline: none;
      border-color: #60a5fa;
    }

    /* Animation des particules */
    .particle {
      position: absolute;
      width: 0.3vmin;
      height: 0.3vmin;
      background: rgba(255, 255, 255, 0.7);
      border-radius: 50%;
      z-index: 5;
      animation: float 6s ease-in-out forwards;
      opacity: 0.8;
    }

    @keyframes float {
      0% {
        transform: translateY(100vh) translateX(0);
        opacity: 0.8;
      }
      20% { opacity: 1; }
      80% { opacity: 1; }
      100% {
        transform: translateY(-20vh) translateX(calc(5vw * var(--direction)));
        opacity: 0;
      }
    }

    /* Media Queries pour responsivité */
    @media (max-width: 480px) {
      .circle {
        width: 10vmin;
        height: 10vmin;
        min-width: 50px;
        min-height: 50px;
      }
      .circle--ios {
        width: 11vmin;
        height: 11vmin;
        min-width: 62px;
        min-height: 62px;
      }
      .button {
        padding: 2.2vmin 4vmin;
        font-size: 3.2vmin;
      }
      .back-button {
        padding: 2.2vmin 3.5vmin;
        font-size: 3.2vmin;
        left: 1vmin;
        bottom: 2vmin;
      }
      .buttons {
        bottom: 20vmin;
      }
      .logo {
        width: 42vmin;
        max-width: 300px;
        top: 4vmin;
      }
      .logo--ios {
        width: 48vmin;
        max-width: 360px;
        top: 5vmin;
      }
      .circle-container {
        max-height: 55vh;
        margin-top: 18vmin;
      }
      #alertBox {
        font-size: 3.5vmin;
        padding: 2vmin 3.5vmin;
        top: 14vmin;
      }
      .row-number {
        font-size: 3vmin;
        right: 0vmin;
      }
      .button-icon {
        width: 4.5vmin;
        height: 4.5vmin;
      }
      .language-toggle select {
        font-size: 2.5vmin;
        padding: 1.2vmin;
      }
    }

    @media (min-width: 481px) and (max-width: 768px) {
      .circle {
        width: 9.5vmin;
        height: 9.5vmin;
        min-width: 52px;
        min-height: 52px;
      }
      .circle--ios {
        width: 10.5vmin;
        height: 10.5vmin;
        min-width: 60px;
        min-height: 60px;
      }
      .button {
        padding: 2vmin 4.5vmin;
        font-size: 2.8vmin;
      }
      .buttons {
        bottom: 11vmin;
      }
      .back-button {
        bottom: 3vmin;
      }
      .logo {
        width: 45vmin;
        max-width: 330px;
        top: 4.5vmin;
      }
      .logo--ios {
        width: 51vmin;
        max-width: 390px;
        top: 5.5vmin;
      }
      .circle-container {
        max-height: 60vh;
        margin-top: 19vmin;
      }
      .language-toggle select {
        font-size: 2.2vmin;
      }
    }

    @media (min-width: 769px) {
      .circle {
        width: 8.5vmin;
        height: 8.5vmin;
        min-width: 54px;
        min-height: 54px;
      }
      .circle--ios {
        width: 10.5vmin;
        height: 10.5vmin;
        min-width: 60px;
        min-height: 60px;
      }
      .button {
        padding: 1.8vmin 5vmin;
        font-size: 2.3vmin;
        max-width: 220px;
      }
      .logo {
        width: 48vmin;
        max-width: 360px;
      }
      .logo--ios {
        width: 54vmin;
        max-width: 420px;
      }
    }

    @media (orientation: landscape) and (max-height: 500px) {
      .circle-container {
        max-height: 45vh;
        margin-top: 14vmin;
      }
      .logo {
        top: 3vmin;
      }
      .logo--ios {
        top: 4vmin;
      }
      .buttons {
        bottom: 9vmin;
      }
      .back-button {
        bottom: 2vmin;
      }
      #alertBox {
        top: 12vmin;
      }
    }