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

    body {
      font-family: 'Courier New', monospace;
      background: radial-gradient(circle at center, #0a0f0a 0%, #000 100%);
      color: #00ff88;
      overflow-x: hidden;
    }

    /* Fondo tipo Matrix */
    .particles {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: -1;
      background: repeating-linear-gradient(
        180deg,
        rgba(0, 255, 64, 0.05) 0px,
        rgba(0, 255, 64, 0.05) 2px,
        transparent 2px,
        transparent 4px
      );
      animation: matrixScroll 10s linear infinite;
    }

    @keyframes matrixScroll {
      from { background-position-y: 0; }
      to { background-position-y: 100%; }
    }

    /* Navbar */
    nav {
      position: fixed;
      top: 0;
      width: 100%;
      padding: 20px 50px;
      background: rgba(0, 0, 0, 0.6);
      backdrop-filter: blur(6px);
      border-bottom: 1px solid rgba(0, 255, 128, 0.3);
      z-index: 1000;
      transition: background 0.3s ease;
    }

    nav.scrolled {
      background: rgba(0, 0, 0, 0.9);
    }

    .logo {
      font-size: 22px;
      font-weight: bold;
      color: #00ff88;
      text-shadow: 0 0 10px #00ff88;
      letter-spacing: 1px;
    }

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

    .nav-links a {
      color: #00ff88;
      text-decoration: none;
      font-weight: bold;
      transition: all 0.3s ease;
      position: relative;
    }

    .nav-links a:hover {
      color: #baffc9;
      text-shadow: 0 0 10px #00ff88;
    }

    .nav-links a::after {
      content: "";
      position: absolute;
      bottom: -5px;
      left: 0;
      width: 0;
      height: 2px;
      background: #00ff88;
      transition: width 0.3s ease;
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    /* Hero */
    .hero {
      height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 0 20px;
      position: relative;
    }

    .hero h1 {
      font-size: 4rem;
      color: #00ff88;
      text-shadow: 0 0 20px #00ff88;
      margin-bottom: 15px;
      animation: glowPulse 2.5s infinite alternate;
    }

    @keyframes glowPulse {
      from { text-shadow: 0 0 10px #00ff88; }
      to { text-shadow: 0 0 25px #00ffcc; }
    }

    .hero h2 {
      color: #00cc66;
      font-size: 1.5rem;
      margin-bottom: 20px;
    }

    .hero p {
      color: #aaffcc;
      font-size: 1.1rem;
      line-height: 1.6;
      margin-bottom: 40px;
    }

    .cta-button {
      padding: 15px 40px;
      background: linear-gradient(90deg, #00ff88, #00cc66);
      color: #000;
      text-transform: uppercase;
      font-weight: bold;
      border-radius: 30px;
      box-shadow: 0 0 15px #00ff88;
      transition: all 0.3s ease;
    }

    .cta-button:hover {
      transform: scale(1.05);
      box-shadow: 0 0 25px #00ff88, 0 0 40px #00cc66;
    }

    /* Secciones */
    .section {
      padding: 100px 20px;
      max-width: 1200px;
      margin: auto;
    }

    .section-title {
      font-size: 2.5rem;
      text-align: center;
      color: #00ff88;
      text-shadow: 0 0 20px #00ff88;
      margin-bottom: 40px;
    }

    /* Tarjetas */
    .skill-category, .project-card, .contact-info, .timeline-content {
      background: rgba(0, 20, 0, 0.7);
      border: 1px solid rgba(0, 255, 128, 0.3);
      border-radius: 10px;
      padding: 25px;
      transition: all 0.3s ease;
    }

    .skill-category:hover, .project-card:hover, .timeline-content:hover {
      box-shadow: 0 0 20px rgba(0, 255, 128, 0.4);
      transform: translateY(-5px);
    }

    .skill-item, .contact-item {
      background: rgba(0, 255, 128, 0.05);
      border-radius: 8px;
      padding: 10px;
      margin-bottom: 10px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .skill-item:hover {
      background: rgba(0, 255, 128, 0.15);
    }
.timeline {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
  padding: 50px 0;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  width: 2px;
  height: 100%;
  background: #00ff88; /* Línea central tipo Matrix */
  transform: translateX(-50%);
}

/* Elementos de la línea de tiempo */
.timeline-item {
  position: relative;
  width: 50%;
  padding: 20px 40px;
  box-sizing: border-box;
}

/* Izquierda */
.timeline-item.time1 {
  left: 0;
  text-align: right;
}

/* Derecha */
.timeline-item.time2 {
  left: 50%;
  text-align: left;
}

/* Izquierda */
.timeline-item.time3 {
  left: 0;
  text-align: right;
}

/* Derecha */
.timeline-item.time4 {
  left: 50%;
  text-align: left;
}

/* Puntos de conexión */
.timeline-item::before {
  content: "";
  position: absolute;
  top: 25px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: #00ff88;
  box-shadow: 0 0 10px #00ff88;
  z-index: 1;
}

/* Punto del lado izquierdo */
.timeline-item.time1::before {
  right: -8px;
}

/* Punto del lado derecho */
.timeline-item.time2::before {
  left: -8px;
}

/* Punto del lado derecho */
.timeline-item.time3::before {
  right: -8px;
}

/* Punto del lado derecho */
.timeline-item.time4::before {
  left: -8px;
}
/* Contenido */
.timeline-content {
  background: rgba(0, 20, 0, 0.8);
  padding: 20px;
  border: 1px solid rgba(0, 255, 128, 0.3);
  border-radius: 10px;
  box-shadow: 0 0 20px rgba(0, 255, 128, 0.2);
  transition: all 0.3s ease;
}

.timeline-content:hover {
  box-shadow: 0 0 25px #00ff88;
  transform: translateY(-5px);
}

/* Responsivo */
@media (max-width: 768px) {
  .timeline::before {
    left: 8px;
  }
  .timeline-item {
    width: 100%;
    padding-left: 30px;
    padding-right: 15px;
  }
  .timeline-item.time1, .timeline-item.time2, .timeline-item.time3, .timeline-item.time4 {
    left: 0;
    text-align: left;
  }
  .timeline-item::before {
    left: 0;
  }
}


.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tech-one {
  margin: 0;
}

.tech-tag {
  background: rgba(0, 255, 128, 0.2);
  border: 1px solid #00ff88;
  border-radius: 15px;
  color: #00ff88;
  padding: 4px 10px;
  font-size: 0.8rem;
}


    .submit-btn {
      background: linear-gradient(90deg, #00ff88, #00cc66);
      color: #000;
      border: none;
      padding: 15px;
      border-radius: 10px;
      font-weight: bold;
      transition: all 0.3s ease;
    }

    .submit-btn:hover {
      box-shadow: 0 0 20px #00ff88;
      transform: translateY(-3px);
    }

    /* Efecto scroll */
    .fade-in {
      opacity: 0;
      transform: translateY(40px);
      transition: all 0.8s ease;
    }

    .fade-in.active {
      opacity: 1;
      transform: translateY(0);
    }

    /* Responsivo */
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hero h1 { font-size: 2.5rem; }
      .section { padding: 60px 20px; }
    }