:root {
  --primary: #1c3d5a;         /* Azul oscuro para encabezado */
  --secondary: #3498db;       /* Azul claro para títulos */
  --bg: #f4f4f4;
  --text: #333;
  --white: #fff;
}

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

body {
  font-family: 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 20px;
}

header {
  background: var(--primary);
  color: var(--white);
  text-align: center;
  padding: 40px 20px;
}

.header-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.avatar {
  border-radius: 50%;
  width: 120px;
  height: 120px;
  object-fit: cover;
  margin-bottom: 15px;
}

h1 {
  font-size: 2rem;
}

.subtitle {
  font-size: 1.2rem;
  color: #ccc;
}

/* Títulos en azul claro */
h1, h2, h3 {
  color: var(--secondary);
  margin-bottom: 10px;
}

/* Dos columnas */
.two-columns {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
}

.left, .right {
  flex: 1;
  min-width: 300px;
}

/* Listas y trabajos */
ul {
  list-style-type: disc;
  padding-left: 20px;
  margin-bottom: 20px;
}

.job {
  margin-bottom: 20px;
}

/* Etiquetas técnicas */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  padding: 0;
}

.tags li {
  background: var(--secondary);
  color: white;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.9rem;
}

/* Botones */
.btn {
  display: inline-block;
  background: var(--secondary);
  color: white;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 5px;
  margin-right: 10px;
}

.btn.secondary {
  background: transparent;
  border: 2px solid var(--secondary);
  color: var(--secondary);
}

/* Footer */
footer {
  text-align: center;
  margin-top: 40px;
  padding: 20px;
  background: #ddd;
}

/* Responsive */
@media (max-width: 768px) {
  .two-columns {
    flex-direction: column;
  }

  .btn {
    display: block;
    width: 100%;
    text-align: center;
    margin: 10px 0;
  }
}