/* Global Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  background-color: #000;
  /* Fondo negro global fallback */
}

body {
  font-family: 'Roboto', sans-serif;
  background-color: transparent;
  /* Permitir ver el fondo fijo */
  color: #fff;
  overflow-x: hidden;
  min-height: 100vh;
  /* Prevenir scroll horizontal accidental */
}

/* Navbar styles */
.main-nav {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  background: rgba(0, 0, 0, 0.6);
  /* Fondo semitransparente para legibilidad */
  border-radius: 30px;
  display: flex;
  gap: 15px;
  backdrop-filter: blur(5px);
  /* New requested dimensions */
  /* New requested dimensions */
  width: 95%;
  max-width: 400px;
  height: 50px;
  justify-content: center;
  align-items: center;
}

.nav-btn {
  background: transparent;
  border: 2px solid transparent;
  color: #fff;
  padding: 8px 20px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border-radius: 20px;
  text-transform: uppercase;
  font-weight: bold;
}

.nav-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

.nav-btn.active {
  background: #fff;
  color: #000;
}

/* Main Content Area */
.content-area {
  padding: 110px 2rem 2rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  min-height: 60vh;
  /* Altura mínima para contenido */
}

/* Sections visibility logic */
.section {
  display: none;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
}

.section.active {
  display: block;
  opacity: 1;
  animation: fadeIn 0.5s ease-in;
}

#global-bg {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  /* width: 100vw; height: 100vh; removed for better mobile support */
  z-index: -10;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: background-image 0.5s ease-in-out;
  opacity: 0.6;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Proyectos Section --- */
.project-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.project-item {
  position: relative;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 10px;
  overflow: hidden;
  background-color: #111;
  min-height: 250px;
  width: 60vw;
  display: flex;
  align-items: center;
}

.project-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0.4;
  /* Fondo oscurecido para resaltar contenido */
  z-index: 1;
}

.project-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: row;
  /* Imagen izq, texto der */
  width: 100%;
  padding: 2rem;
  align-items: center;
  gap: 2rem;
}

.project-visual img {
  max-width: 300px;
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.project-info {
  flex: 1;
}

.project-info h3 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: #00bcd4;
  /* Color de acento */
}

.project-info p {
  font-size: 1.1rem;
  line-height: 1.6;
  color: #e0e0e0;
}

/* --- Bio Section --- */
.bio-container {
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 4rem 2rem;
}

.bio-text {
  max-width: 800px;
  background: rgba(255, 255, 255, 0.05);
  /* Fondo sutil */
  padding: 3rem;
  border-radius: 15px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.bio-text h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  color: #21211f;
}

.bio-text p {
  font-size: 1.2rem;
  line-height: 1.8;
}

/* --- Certificados Section --- */
.certificates-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  /* 4 columnas fijas */
  gap: 20px;
  padding: 1rem 0;
}

.cert-item {
  background: #111;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.3s ease;
  border: 1px solid #333;
}

.cert-item:hover {
  transform: scale(1.05);
  z-index: 2;
  border-color: #00bcd4;
}

.cert-item img {
  width: 100%;
  height: 100%;
  /* O 'auto' si quieres mantener el aspect ratio estricto */
  object-fit: cover;
  display: block;
}

/* --- Responsive Design --- */
@media (max-width: 1024px) {
  .certificates-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .project-content {
    flex-direction: column;
    text-align: center;
  }

  .project-visual img {
    max-width: 100%;
  }

  .certificates-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .main-nav {
    transform: translateX(-50%) scale(0.9);
  }
}

@media (max-width: 480px) {
  .certificates-grid {
    grid-template-columns: 1fr;
  }

  .bio-text {
    padding: 1.5rem;
  }
}