:root {
      --primary-color: #ff3c00;
      --secondary-color: #ff0000;
      --bg-gradient: radial-gradient(circle at top left, #1a0000, #000000);
      --modal-bg: #0e0e0e;
      --modal-border: #ff2a2a;
      --text-color: #ffffff;
      --button-shadow: 0 0 10px #ff3c00, 0 0 20px #ff0000;
      --button-hover-shadow: 0 0 15px #ff3c00, 0 0 30px #ff0000;
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    body {
      margin: 0;
      font-family: 'Poppins', sans-serif;
      background: var(--bg-gradient);
      color: var(--text-color);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      line-height: 1.6;
    }
    
    .modal {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.85);
      overflow-y: auto;
      display: flex;
      align-items: center;
      justify-content: center;
      animation: fadeIn 0.6s ease-in-out;
      padding: 20px;
      z-index: 1000;
    }
    
    .modal-content {
      background: var(--modal-bg);
      border: 1px solid var(--modal-border);
      padding: 2rem;
      border-radius: 20px;
      text-align: center;
      width: 100%;
      max-width: 500px;
      box-shadow: 0 0 20px rgba(255, 60, 0, 0.7);
      animation: slideIn 0.6s ease-out;
      margin: auto;
    }
    
    .modal-content img {
      max-width: 100%;
      height: auto;
      border-radius: 12px;
      margin-bottom: 1.5rem;
      border: none;
      background: linear-gradient(90deg, #222, #333, #222);
      background-size: 200% 100%;
      animation: shimmer 1.5s infinite linear;
    }
    
    h1 {
      font-size: clamp(1.3rem, 4vw, 1.8rem);
      margin-bottom: 1.5rem;
      font-weight: 600;
      line-height: 1.3;
    }
    
    .buttons-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 1rem;
      width: 100%;
    }
    
    .modal-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 100%;
      max-width: 280px;
      height: 50px;
      margin: 0;
      background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
      color: white;
      border: none;
      border-radius: 25px;
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      box-shadow: var(--button-shadow);
      transition: all 0.3s ease;
      text-decoration: none;
    }
    
    .modal-btn i {
      margin-right: 10px;
      font-size: 1.1rem;
    }
    
    .modal-btn:hover, .modal-btn:focus {
      transform: scale(1.05);
      box-shadow: var(--button-hover-shadow);
      outline: 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-width: 0;
    }
    
    @keyframes fadeIn {
      from { opacity: 0; }
      to { opacity: 1; }
    }
    
    @keyframes slideIn {
      from { transform: scale(0.95) translateY(-20px); opacity: 0; }
      to { transform: scale(1) translateY(0); opacity: 1; }
    }
    
    @keyframes shimmer {
      0% { background-position: 200% 0; }
      100% { background-position: -200% 0; }
    }
    
    @media (prefers-reduced-motion: reduce) {
      * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
      }
    }
    
    /* Estilos para pantallas pequeñas (hasta 480px) */
    @media (max-width: 480px) {
      .modal {
        padding: 10px;
      }
      
      .modal-content {
        padding: 1.5rem;
        border-radius: 15px;
      }
      
      h1 {
        font-size: 1.3rem;
        margin-bottom: 1.2rem;
      }
      
      .modal-btn {
        height: 45px;
        font-size: 0.9rem;
      }
    }
    
    /* Estilos para pantallas medianas (481px a 768px) */
    @media (min-width: 481px) and (max-width: 768px) {
      .modal-content {
        max-width: 400px;
      }
    }
    
    /* Estilos para pantallas grandes (769px en adelante) */
    @media (min-width: 769px) {
      .modal-content {
        padding: 2.5rem;
      }
      
      .buttons-container {
        gap: 1.2rem;
      }
      
      .modal-btn {
        max-width: 300px;
        height: 55px;
        font-size: 1.1rem;
      }
    }