* {
      box-sizing: border-box;
    }
    
    body {
      position: relative;
      overflow-x: hidden;
      margin: 0;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }
    
    #dynamic-background {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      z-index: -1;
      background: linear-gradient(135deg, #2e2e53, #8cac82, #0f3460, #533483, #4d1a06);
      background-size: 500% 500%;
      animation: gradientShift 20s ease infinite;
    }
    
    @keyframes gradientShift {
      0% { background-position: 0% 50%; }
      25% { background-position: 50% 0%; }
      50% { background-position: 100% 50%; }
      75% { background-position: 50% 100%; }
      100% { background-position: 0% 50%; }
    }
/* banner de promotion */
    .urgency-banner {
      background: linear-gradient(135deg, #ff6b6b, #ee5a24);
      color: white;
      padding: 1rem;
      text-align: center;
      font-weight: 700;
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
        0%, 100% { opacity: 1; }
        50% { opacity: 0.8; }
    }
    
    .floating-education-elements {
      position: absolute;
      width: 100%;
      height: 100%;
      pointer-events: none;
      overflow: hidden;
    }
    
    .edu-symbol {
      position: absolute;
      color: rgba(255, 255, 255, 0.1);
      font-size: 2rem;
      animation: floatEducation 15s ease-in-out infinite;
      transform-origin: center;
    }
    
    @keyframes floatEducation {
      0%, 100% { 
        transform: translateY(0px) rotate(0deg) scale(1); 
        opacity: 0.1; 
      }
      25% { 
        transform: translateY(-40px) rotate(15deg) scale(1.2); 
        opacity: 0.3; 
      }
      50% { 
        transform: translateY(-80px) rotate(-10deg) scale(0.8); 
        opacity: 0.2; 
      }
      75% { 
        transform: translateY(-60px) rotate(25deg) scale(1.1); 
        opacity: 0.25; 
      }
    }
    
    .knowledge-particle {
      position: absolute;
      width: 6px;
      height: 6px;
      background: linear-gradient(45deg, #00d4ff, #032250, #28a745);
      border-radius: 50%;
      animation: knowledgeFlow 8s linear infinite;
      opacity: 0;
    }
    
    @keyframes knowledgeFlow {
      0% {
        opacity: 0;
        transform: translateY(100vh) scale(0.5);
      }
      10% {
        opacity: 1;
        transform: translateY(90vh) scale(1);
      }
      90% {
        opacity: 1;
        transform: translateY(-10vh) scale(0.8);
      }
      100% {
        opacity: 0;
        transform: translateY(-20vh) scale(0.3);
      }
    }
    
    .brain-network {
      position: absolute;
      width: 200px;
      height: 200px;
      border: 2px solid rgba(0, 212, 255, 0.3);
      border-radius: 50%;
      animation: brainPulse 6s ease-in-out infinite;
    }
    
    @keyframes brainPulse {
      0%, 100% {
        transform: scale(1) rotate(0deg);
        border-color: rgba(0, 212, 255, 0.3);
      }
      50% {
        transform: scale(1.2) rotate(180deg);
        border-color: rgba(40, 167, 69, 0.4);
      }
    }
    
    .brain-network::before,
    .brain-network::after {
      content: '';
      position: absolute;
      width: 100%;
      height: 100%;
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 50%;
      top: 0;
      left: 0;
      animation: brainRipple 4s ease-out infinite;
    }
    
    .brain-network::after {
      animation-delay: 2s;
    }
    
    @keyframes brainRipple {
      0% {
        transform: scale(0.8);
        opacity: 1;
      }
      100% {
        transform: scale(2.5);
        opacity: 0;
      }
    }
    
    .data-stream {
      position: absolute;
      width: 2px;
      height: 100px;
      background: linear-gradient(to bottom,
        transparent 0%,
        rgba(0, 255, 255, 0.8) 20%,
        rgb(3, 35, 85) 50%,
        rgba(40, 167, 69, 0.8) 80%,
        transparent 100%
      );
      border-radius: 1px;
      animation: dataFlow 4s ease-in-out infinite;
    }
    
    @keyframes dataFlow {
      0% {
        height: 20px;
        opacity: 0;
        transform: translateY(0) scaleY(1);
      }
      30% {
        height: 120px;
        opacity: 1;
        transform: translateY(-60px) scaleY(1.2);
      }
      70% {
        height: 80px;
        opacity: 0.8;
        transform: translateY(-120px) scaleY(0.9);
      }
      100% {
        height: 20px;
        opacity: 0;
        transform: translateY(-180px) scaleY(0.5);
      }
    }
    
    .digital-book {
      position: absolute;
      width: 60px;
      height: 40px;
      background: linear-gradient(45deg, rgba(13, 110, 253, 0.6), rgba(0, 212, 255, 0.4));
      border-radius: 5px;
      animation: bookFloat 10s ease-in-out infinite;
      transform-origin: center;
    }
    
    @keyframes bookFloat {
      0%, 100% {
        transform: translateY(0px) rotateX(0deg) rotateY(0deg);
        opacity: 0.6;
      }
      25% {
        transform: translateY(-30px) rotateX(15deg) rotateY(-10deg);
        opacity: 0.8;
      }
      50% {
        transform: translateY(-60px) rotateX(-10deg) rotateY(20deg);
        opacity: 0.4;
      }
      75% {
        transform: translateY(-40px) rotateX(20deg) rotateY(-15deg);
        opacity: 0.7;
      }
    }
    
    .digital-book::before {
      content: '';
      position: absolute;
      top: 5px;
      left: 8px;
      right: 8px;
      height: 2px;
      background: rgba(255, 255, 255, 0.8);
      border-radius: 1px;
      box-shadow: 0 8px 0 rgba(255, 255, 255, 0.6),
                  0 16px 0 rgba(255, 255, 255, 0.4),
                  0 24px 0 rgba(255, 255, 255, 0.3);
    }
    
    .hero-section {
      position: relative;
      background: rgba(0, 0, 0, 0.4);
      backdrop-filter: blur(15px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      overflow: hidden;
      min-height: 100vh;
      display: flex;
      align-items: center;
    }
    
    .hero-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="educational-grid" width="30" height="30" patternUnits="userSpaceOnUse"><circle cx="15" cy="15" r="1" fill="rgba(255,255,255,0.1)"/><rect x="10" y="10" width="10" height="10" fill="none" stroke="rgba(0,212,255,0.05)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23educational-grid)"/></svg>');
      opacity: 0.4;
      animation: gridMove 25s linear infinite;
    }
    
    @keyframes gridMove {
      0% { transform: translateX(0) translateY(0); }
      100% { transform: translateX(30px) translateY(30px); }
    }
    
    .hero-content {
      position: relative;
      z-index: 2;
    }
    
    .hero-title {
      background: linear-gradient(135deg, #fff, #00d4ff, #0066ff, #28a745);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      animation: titleGlow 4s ease-in-out infinite alternate;
      text-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
      background-size: 300% 300%;
    }
    
    @keyframes titleGlow {
      0% { 
        filter: brightness(1); 
        background-position: 0% 50%;
      }
      100% { 
        filter: brightness(1.3); 
        background-position: 100% 50%;
      }
    }
    
    .interactive-card {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(15px);
      border: 1px solid rgba(255, 255, 255, 0.3);
      transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
      position: relative;
      overflow: hidden;
    }
    
    .interactive-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(13, 110, 253, 0.15), transparent);
      transition: left 0.8s;
    }
    
    .interactive-card:hover::before {
      left: 100%;
    }
    
    .interactive-card:hover {
      transform: translateY(-20px) scale(1.03);
      box-shadow: 0 30px 60px rgba(13, 110, 253, 0.4);
      border-color: rgba(13, 110, 253, 0.6);
    }
    
    .icon-container {
      position: relative;
      transition: all 0.6s ease;
    }
    
    .icon-container:hover {
      transform: rotateY(360deg) scale(1.1);
    }
    
    .pulse-btn {
      position: relative;
      overflow: hidden;
      background: linear-gradient(135deg, #0d6efd, #0066ff, #00d4ff, #28a745);
      background-size: 300% 300%;
      animation: gradientPulse 4s ease infinite;
      box-shadow: 0 0 40px rgba(13, 110, 253, 0.5);
    }
    
    @keyframes gradientPulse {
      0%, 100% { background-position: 0% 50%; }
      50% { background-position: 100% 50%; }
    }
    
    .pulse-btn::before {
      content: '';
      position: absolute;
      top: 50%;
      left: 50%;
      width: 0;
      height: 0;
      background: rgba(255, 255, 255, 0.4);
      border-radius: 50%;
      transform: translate(-50%, -50%);
      transition: width 0.8s, height 0.8s;
    }
    
    .pulse-btn:hover::before {
      width: 400px;
      height: 400px;
    }

    .brand-lock {
      width: 64px;
      height: 64px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #0d6efd, #28a745);
      color: #fff;
      border-radius: 16px;
      box-shadow: 0 10px 25px rgba(13, 110, 253, 0.3);
    }

    .navbar {
      background: rgba(255, 255, 255, 0.95) !important;
      backdrop-filter: blur(15px);
      border-bottom: 1px solid rgba(0, 0, 0, 0.1);
      position: fixed;
      top: 0;
      width: 100%;
      z-index: 1000;
    }
    
    .section-bg {
      background: rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(20px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }
    
    .cyber-text {
      position: relative;
      display: inline-block;
    }
    
    .cyber-text::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -2px;
      width: 0;
      height: 2px;
      background: linear-gradient(90deg, #0d6efd, #00d4ff, #28a745);
      transition: width 0.4s ease;
    }
    
    .cyber-text:hover::after {
      width: 100%;
    }
    
    .stats-card {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(15px);
      border: 1px solid rgba(255, 255, 255, 0.3);
      transition: all 0.4s ease;
    }

    .stats-card:hover {
      transform: translateY(-8px) scale(1.02);
      box-shadow: 0 20px 40px rgba(13, 110, 253, 0.3);
    }

    .stats-number {
      font-size: 2.5rem;
      font-weight: bold;
      background: linear-gradient(135deg, #0d6efd, #00d4ff, #28a745);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .image-3d {
      transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
      transition: all 0.8s ease;
      filter: drop-shadow(15px 15px 25px rgba(0, 0, 0, 0.3));
    }

    .image-3d:hover {
      transform: perspective(1000px) rotateY(0deg) rotateX(0deg) scale(1.05);
      filter: drop-shadow(20px 20px 35px rgba(0, 0, 0, 0.4));
    }

    body {
      padding-top: 76px;
    }
    
    .morphing-shape {
      position: absolute;
      background: rgba(13, 110, 253, 0.15);
      border-radius: 50%;
      animation: morph 10s ease-in-out infinite;
    }
    
    @keyframes morph {
      0%, 100% { 
        border-radius: 50%; 
        transform: rotate(0deg) scale(1); 
        background: rgba(13, 110, 253, 0.15);
      }
      25% { 
        border-radius: 25% 75% 75% 25%; 
        transform: rotate(90deg) scale(1.1); 
        background: rgba(0, 212, 255, 0.2);
      }
      50% { 
        border-radius: 10% 90% 10% 90%; 
        transform: rotate(180deg) scale(0.9); 
        background: rgba(40, 167, 69, 0.18);
      }
      75% { 
        border-radius: 75% 25% 25% 75%; 
        transform: rotate(270deg) scale(1.05); 
        background: rgba(0, 212, 255, 0.16);
      }
    }