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

body {
  font-family: Arial, sans-serif;
  background: linear-gradient(to bottom, #000 70%, #222);
  color: #fff;
  line-height: 1.6;
}

/* Menú principal */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: rgba(0, 0, 0, 0.8);
  position: sticky;
  top: 0;
  z-index: 1000;
}

nav .logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: #0f0;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  transition: color 0.3s;
}

nav ul li a:hover {
  color: #0f0;
}

/* Hero */
.hero {
  text-align: center;
  padding: 5rem 2rem;
}

.hero h1 {
  font-size: 2.5rem;
  color: #0f0;
  margin-bottom: 1rem;
}

/* Secciones */
section {
  padding: 3rem 2rem;
}

section h2 {
  text-align: center;
  margin-bottom: 2rem;
  color: #0f0;
}

/* Tarjetas de proyectos */
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.card {
  background: #111;
  border-radius: 20px;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(0,255,0,0.4);
}

.card h3 {
  margin-bottom: 1rem;
  color: #0f0;
}