body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  background: #1c1c1c;
  color: #f0f0f0;
}

header {
  background: #272727;
  text-align: center;
  padding: 2rem;
}

header h1 {
  margin: 0;
  font-size: 2.5rem;
}

header p {
  font-size: 1.2rem;
  color: #aaa;
}

section {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

h2 {
  border-bottom: 2px solid #555;
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
}

.proyecto {
  margin-bottom: 2rem;
}

.video-container {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  margin-top: 1rem;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

footer {
  background: #272727;
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
  color: #aaa;
}