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

    body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      background: linear-gradient(135deg, #66eac9 0%, #042c25 100%);
      min-height: 100vh;
      color: #fff;
      overflow-x: hidden;
    }

    /* Partículas de fondo animadas */
    .particles {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      z-index: 1;
    }

    .particle {
      position: absolute;
      width: 4px;
      height: 4px;
      background: rgba(255, 255, 255, 0.5);
      border-radius: 50%;
      animation: float 6s ease-in-out infinite;
    }

    .particle:nth-child(1) { left: 10%; animation-delay: 0s; }
    .particle:nth-child(2) { left: 20%; animation-delay: 1s; }
    .particle:nth-child(3) { left: 30%; animation-delay: 2s; }
    .particle:nth-child(4) { left: 40%; animation-delay: 3s; }
    .particle:nth-child(5) { left: 50%; animation-delay: 4s; }
    .particle:nth-child(6) { left: 60%; animation-delay: 5s; }
    .particle:nth-child(7) { left: 70%; animation-delay: 0.5s; }
    .particle:nth-child(8) { left: 80%; animation-delay: 1.5s; }
    .particle:nth-child(9) { left: 90%; animation-delay: 2.5s; }

    @keyframes float {
      0%, 100% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
      10% { opacity: 1; }
      90% { opacity: 1; }
      100% { transform: translateY(-100px) rotate(360deg); opacity: 0; }
    }

    /* Contenedor principal */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 2rem;
      position: relative;
      z-index: 2;
    }

    /* Hero Section */
    #hero {
      text-align: center;
      padding: 4rem 1rem 3rem;
      position: relative;
    }

    .hero-content {
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(20px);
      border-radius: 20px;
      padding: 4rem 2rem;
      border: 1px solid rgba(255, 255, 255, 0.2);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
      transform: translateY(20px);
      opacity: 0;
      animation: slideUp 1s ease-out forwards;
    }

    #hero h1 {
      font-size: 4rem;
      margin-bottom: 1rem;
      background: linear-gradient(45deg, #fff, #f0f8ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      font-weight: 700;
      text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    }

    .version {
      font-size: 1.3rem;
      margin-bottom: 1rem;
      color: rgba(255, 255, 255, 0.9);
      font-weight: 400;
    }

    .description {
      font-size: 1.1rem;
      margin-bottom: 2.5rem;
      color: rgba(255, 255, 255, 0.8);
      max-width: 500px;
      margin-left: auto;
      margin-right: auto;
      line-height: 1.6;
    }

    .btn-download {
      font-size: 1.3rem;
      padding: 1.2rem 3.5rem;
      background: linear-gradient(45deg, #ff6b6b, #ffa726);
      color: #fff;
      border: none;
      border-radius: 50px;
      cursor: pointer;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 1px;
      position: relative;
      overflow: hidden;
      transition: all 0.3s ease;
      box-shadow: 0 10px 30px rgba(255, 107, 107, 0.4);
    }

    .btn-download::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
      transition: left 0.5s;
    }

    .btn-download:hover::before {
      left: 100%;
    }

    .btn-download:hover {
      transform: translateY(-3px);
      box-shadow: 0 15px 40px rgba(255, 107, 107, 0.6);
    }

    .btn-download:active {
      transform: translateY(-1px);
    }

    /* Features Section */
    #features {
      padding: 3rem 1rem;
      position: relative;
    }

    .features-container {
      background: rgba(255, 255, 255, 0.05);
      backdrop-filter: blur(20px);
      border-radius: 20px;
      padding: 3rem 2rem;
      border: 1px solid rgba(255, 255, 255, 0.1);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    }

    #features h2 {
      text-align: center;
      font-size: 2.5rem;
      margin-bottom: 3rem;
      background: linear-gradient(45deg, #fff, #e1f5fe);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      font-weight: 600;
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1.5rem;
      max-width: 800px;
      margin: 0 auto 3rem;
    }

    .feature-item {
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(10px);
      border-radius: 15px;
      padding: 1.5rem 1rem;
      text-align: center;
      border: 1px solid rgba(255, 255, 255, 0.2);
      transition: all 0.3s ease;
      opacity: 0;
      transform: translateY(30px);
      animation: slideUp 0.8s ease-out forwards;
    }

    .feature-item:nth-child(1) { animation-delay: 0.2s; }
    .feature-item:nth-child(2) { animation-delay: 0.4s; }
    .feature-item:nth-child(3) { animation-delay: 0.6s; }
    .feature-item:nth-child(4) { animation-delay: 0.8s; }

    .feature-item:hover {
      transform: translateY(-10px);
      background: rgba(255, 255, 255, 0.15);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    }

    .feature-icon {
      font-size: 2.5rem;
      margin-bottom: 1rem;
      display: block;
      animation: bounce 2s infinite;
    }

    .feature-text {
      font-size: 1rem;
      color: rgba(255, 255, 255, 0.9);
      font-weight: 500;
    }

    /* Installation Section - NUEVA Y MEJORADA */
    #installation {
      padding: 4rem 1rem;
      position: relative;
    }

    .installation-container {
      background: rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(25px);
      border-radius: 25px;
      padding: 4rem 2rem;
      border: 1px solid rgba(255, 255, 255, 0.15);
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
      position: relative;
      overflow: hidden;
    }

    .installation-container::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, #ff6b6b, #ffa726, #4ecdc4, #45b7d1);
      background-size: 300% 100%;
      animation: gradientShift 3s ease-in-out infinite;
    }

    @keyframes gradientShift {
      0%, 100% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
    }

    #installation h2 {
      text-align: center;
      font-size: 2.8rem;
      margin-bottom: 2rem;
      background: linear-gradient(45deg, #fff, #4ecdc4);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      font-weight: 700;
      position: relative;
    }

    .installation-intro {
      text-align: center;
      font-size: 1.2rem;
      color: rgba(255, 255, 255, 0.85);
      max-width: 700px;
      margin: 0 auto 4rem;
      line-height: 1.7;
      background: rgba(255, 255, 255, 0.05);
      backdrop-filter: blur(10px);
      padding: 2rem;
      border-radius: 15px;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .installation-intro strong {
      color: #ffa726;
      font-weight: 600;
    }

    .installation-steps {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 2rem;
    }

    .step {
      background: rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(15px);
      border-radius: 20px;
      padding: 2.5rem;
      border: 1px solid rgba(255, 255, 255, 0.12);
      position: relative;
      transition: all 0.4s ease;
      opacity: 0;
      transform: translateX(-50px);
      animation: slideInLeft 0.8s ease-out forwards;
    }

    .step:nth-child(1) { animation-delay: 0.1s; }
    .step:nth-child(2) { animation-delay: 0.2s; }
    .step:nth-child(3) { animation-delay: 0.3s; }
    .step:nth-child(4) { animation-delay: 0.4s; }
    .step:nth-child(5) { animation-delay: 0.5s; }

    .step:hover {
      transform: translateX(10px);
      background: rgba(255, 255, 255, 0.12);
      box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
    }

    .step-number {
      position: absolute;
      top: -15px;
      left: 2rem;
      width: 50px;
      height: 50px;
      background: linear-gradient(45deg, #ff6b6b, #ffa726);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      font-weight: 700;
      color: white;
      box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
      border: 3px solid rgba(255, 255, 255, 0.2);
    }

    .step-title {
      font-size: 1.6rem;
      color: #fff;
      margin-bottom: 1rem;
      font-weight: 600;
      padding-left: 1rem;
      border-left: 4px solid #4ecdc4;
      background: linear-gradient(45deg, #fff, #4ecdc4);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .step-description {
      font-size: 1.1rem;
      color: rgba(255, 255, 255, 0.8);
      line-height: 1.6;
      margin-bottom: 1.5rem;
    }

    .step-highlight {
      background: linear-gradient(45deg, rgba(78, 205, 196, 0.2), rgba(69, 183, 209, 0.2));
      border: 1px solid rgba(78, 205, 196, 0.3);
      border-radius: 12px;
      padding: 1rem 1.5rem;
      color: #4ecdc4;
      font-weight: 500;
      font-size: 1rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .step-warning {
      background: linear-gradient(45deg, rgba(255, 193, 7, 0.15), rgba(255, 107, 107, 0.15));
      border: 1px solid rgba(255, 193, 7, 0.3);
      border-radius: 12px;
      padding: 1.5rem;
      display: flex;
      align-items: flex-start;
      gap: 1rem;
      margin-top: 1rem;
    }

    .warning-icon {
      font-size: 1.5rem;
      flex-shrink: 0;
      margin-top: 0.2rem;
    }

    .warning-text {
      color: rgba(255, 255, 255, 0.9);
      line-height: 1.5;
    }

    .warning-text strong {
      color: #ffc107;
      font-weight: 600;
    }

    /* CTA Section */
    .cta-section {
      text-align: center;
      margin-top: 3rem;
      padding: 2rem;
      background: rgba(255, 255, 255, 0.05);
      border-radius: 20px;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .btn-secondary {
      font-size: 1.2rem;
      padding: 1.2rem 3rem;
      background: linear-gradient(45deg, rgba(37, 211, 102, 0.2), rgba(18, 140, 126, 0.2));
      color: #fff;
      border: 2px solid #25d366;
      border-radius: 50px;
      cursor: pointer;
      font-weight: 600;
      transition: all 0.3s ease;
      backdrop-filter: blur(10px);
      text-decoration: none;
      display: inline-block;
      position: relative;
      overflow: hidden;
    }

    .btn-secondary::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(37, 211, 102, 0.3), transparent);
      transition: left 0.5s;
    }

    .btn-secondary:hover::before {
      left: 100%;
    }

    .btn-secondary:hover {
      background: linear-gradient(45deg, rgba(37, 211, 102, 0.3), rgba(18, 140, 126, 0.3));
      border-color: #25d366;
      transform: translateY(-3px);
      box-shadow: 0 15px 35px rgba(37, 211, 102, 0.4);
    }

    /* WhatsApp Float */
    .whatsapp-float {
      position: fixed;
      bottom: 2rem;
      right: 2rem;
      width: 60px;
      height: 60px;
      background: linear-gradient(45deg, #25d366, #128c7e);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
      z-index: 1000;
      transition: all 0.3s ease;
      animation: pulse 2s infinite;
    }

    .whatsapp-float:hover {
      transform: scale(1.1);
      box-shadow: 0 12px 35px rgba(37, 211, 102, 0.6);
    }

    .whatsapp-icon {
      width: 24px;
      height: 24px;
      color: white;
    }

    @keyframes pulse {
      0% { box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4); }
      50% { box-shadow: 0 8px 25px rgba(37, 211, 102, 0.8); }
      100% { box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4); }
    }

    /* Animaciones */
    @keyframes slideUp {
      from {
        transform: translateY(30px);
        opacity: 0;
      }
      to {
        transform: translateY(0);
        opacity: 1;
      }
    }

    @keyframes slideInLeft {
      from {
        transform: translateX(-50px);
        opacity: 0;
      }
      to {
        transform: translateX(0);
        opacity: 1;
      }
    }

    @keyframes bounce {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-10px); }
    }

    /* Responsive */
    @media (max-width: 768px) {
      .container {
        padding: 1rem;
        max-width: 100%;
      }

      #hero {
        padding: 2rem 0.5rem 1.5rem;
      }

      #hero h1 {
        font-size: 2.5rem;
        line-height: 1.2;
      }

      .hero-content {
        padding: 2.5rem 1.5rem;
        margin: 0 0.5rem;
      }

      .version {
        font-size: 1.1rem;
        margin-bottom: 0.8rem;
      }

      .description {
        font-size: 1rem;
        margin-bottom: 2rem;
        padding: 0 1rem;
      }

      .btn-download {
        font-size: 1rem;
        padding: 1rem 2rem;
        width: auto;
        max-width: 280px;
      }

      #features {
        padding: 2rem 0.5rem;
      }

      .features-container {
        padding: 2rem 1rem;
        margin: 0 0.5rem;
      }

      #features h2 {
        font-size: 1.8rem;
        margin-bottom: 2rem;
      }

      .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        margin-bottom: 2rem;
      }

      .feature-item {
        padding: 1.2rem 0.8rem;
      }

      .feature-icon {
        font-size: 2rem;
        margin-bottom: 0.8rem;
      }

      .feature-text {
        font-size: 0.9rem;
      }

      /* Installation Section Mobile */
      #installation {
        padding: 2rem 0.5rem;
      }

      .installation-container {
        padding: 2rem 1rem;
        margin: 0 0.5rem;
        border-radius: 20px;
      }

      #installation h2 {
        font-size: 2rem;
        margin-bottom: 1.5rem;
      }

      .installation-intro {
        font-size: 1rem;
        padding: 1.5rem;
        margin-bottom: 2rem;
      }

      .step {
        padding: 2rem 1.5rem;
        margin: 0 0.5rem 1.5rem;
      }

      .step:hover {
        transform: translateX(0);
      }

      .step-number {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
        left: 1.5rem;
      }

      .step-title {
        font-size: 1.3rem;
        margin-bottom: 0.8rem;
      }

      .step-description {
        font-size: 1rem;
        margin-bottom: 1rem;
      }

      .step-highlight {
        font-size: 0.9rem;
        padding: 0.8rem 1rem;
      }

      .step-warning {
        padding: 1rem;
        flex-direction: column;
        text-align: center;
      }

      .warning-icon {
        font-size: 1.2rem;
        margin-bottom: 0.5rem;
      }

      .btn-secondary {
        font-size: 1rem;
        padding: 1rem 2rem;
      }

      .whatsapp-float {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 50px;
        height: 50px;
      }

      .whatsapp-icon {
        width: 20px;
        height: 20px;
      }
    }

    @media (max-width: 480px) {
      body {
        font-size: 14px;
      }

      .container {
        padding: 0.5rem;
      }

      #hero {
        padding: 1.5rem 0.25rem 1rem;
      }

      #hero h1 {
        font-size: 2rem;
        line-height: 1.1;
        margin-bottom: 0.8rem;
      }

      .hero-content {
        padding: 2rem 1rem;
        margin: 0 0.25rem;
        border-radius: 15px;
      }

      .version {
        font-size: 1rem;
        margin-bottom: 0.5rem;
      }

      .description {
        font-size: 0.9rem;
        margin-bottom: 1.5rem;
        padding: 0 0.5rem;
        line-height: 1.5;
      }

      .btn-download {
        font-size: 0.9rem;
        padding: 0.9rem 1.5rem;
        width: 100%;
        max-width: 250px;
      }

      #features {
        padding: 1.5rem 0.25rem;
      }

      .features-container {
        padding: 1.5rem 0.8rem;
        margin: 0 0.25rem;
        border-radius: 15px;
      }

      #features h2 {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
        line-height: 1.2;
      }

      .features-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-bottom: 1.5rem;
      }

      .feature-item {
        padding: 1rem 0.8rem;
        border-radius: 12px;
      }

      .feature-icon {
        font-size: 1.8rem;
        margin-bottom: 0.5rem;
      }

      .feature-text {
        font-size: 0.85rem;
        line-height: 1.3;
      }

      /* Installation Mobile Ultra Small */
      #installation {
        padding: 1.5rem 0.25rem;
      }

      .installation-container {
        padding: 1.5rem 0.8rem;
        margin: 0 0.25rem;
        border-radius: 15px;
      }

      #installation h2 {
        font-size: 1.6rem;
        margin-bottom: 1rem;
      }

      .installation-intro {
        font-size: 0.9rem;
        padding: 1rem;
        margin-bottom: 1.5rem;
        border-radius: 12px;
      }

      .step {
        padding: 1.5rem 1rem;
        margin: 0 0.25rem 1rem;
        border-radius: 15px;
      }

      .step-number {
        width: 35px;
        height: 35px;
        font-size: 1rem;
        left: 1rem;
        top: -12px;
      }

      .step-title {
        font-size: 1.1rem;
        margin-bottom: 0.6rem;
        padding-left: 0.5rem;
      }

      .step-description {
        font-size: 0.9rem;
        margin-bottom: 0.8rem;
        line-height: 1.4;
      }

      .step-highlight {
        font-size: 0.8rem;
        padding: 0.6rem 0.8rem;
        border-radius: 8px;
      }

      .step-warning {
        padding: 0.8rem;
        border-radius: 8px;
      }

      .warning-text {
        font-size: 0.8rem;
        line-height: 1.3;
      }

      .btn-secondary {
        font-size: 0.9rem;
        padding: 0.8rem 1.5rem;
        width: 100%;
        max-width: 200px;
      }

      .cta-section {
        padding: 1.5rem 1rem;
        margin-top: 2rem;
      }

      .whatsapp-float {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
      }

      .whatsapp-icon {
        width: 18px;
        height: 18px;
      }

      /* Ajustes para partículas en móvil */
      .particles {
        display: none;
      }
    }

    @media (max-width: 360px) {
      #hero h1 {
        font-size: 1.8rem;
      }

      .hero-content {
        padding: 1.5rem 0.8rem;
      }

      .btn-download {
        font-size: 0.85rem;
        padding: 0.8rem 1.2rem;
      }

      .features-container {
        padding: 1.2rem 0.6rem;
      }

      #features h2 {
        font-size: 1.3rem;
      }

      .installation-container {
        padding: 1.2rem 0.6rem;
      }

      #installation h2 {
        font-size: 1.4rem;
      }

      .step {
        padding: 1.2rem 0.8rem;
      }
    }

    /* ===== SECCIÓN DE DESCARGA MEJORADA ===== */
.download-section {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 40px;
  margin: 40px 0;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.download-title {
  text-align: center;
  color: white;
  font-size: 2rem;
  margin-bottom: 30px;
  font-weight: 600;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.download-card {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 15px;
  padding: 25px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.download-card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.2);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.download-card.recommended {
  border: 2px solid #4CAF50;
  background: rgba(76, 175, 80, 0.1);
}

.recommended-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  background: #4CAF50;
  color: white;
  padding: 5px 10px;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 600;
}

.architecture-icon {
  font-size: 3rem;
  margin-bottom: 15px;
  display: block;
}

.architecture-title {
  color: white;
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.architecture-subtitle {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  margin-bottom: 15px;
  font-weight: 500;
}

.compatible-devices {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 15px;
  margin: 15px 0;
  text-align: left;
}

.compatible-devices h4 {
  color: white;
  font-size: 0.9rem;
  margin-bottom: 8px;
  font-weight: 600;
}

.devices-list {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.8rem;
  line-height: 1.4;
}

.file-info {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.8rem;
  margin: 10px 0;
}

.btn-universal {
  background: linear-gradient(45deg, #667eea, #764ba2);
  padding: 15px 35px;
  font-size: 1.1rem;
  margin: 20px auto;
  display: block;
  width: fit-content;
}

.universal-section {
  text-align: center;
  margin-top: 30px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.universal-title {
  color: white;
  font-size: 1.5rem;
  margin-bottom: 15px;
  font-weight: 600;
}

.universal-description {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 20px;
  font-size: 0.9rem;
}

/* ===== RESPONSIVE PARA NUEVAS SECCIONES ===== */
@media (max-width: 768px) {
  .download-grid {
    grid-template-columns: 1fr;
  }

  .download-section {
    padding: 20px;
  }

  .download-title {
    font-size: 1.5rem;
  }

  .architecture-title {
    font-size: 1.1rem;
  }

  .universal-title {
    font-size: 1.3rem;
  }
}