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

/* Base */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f4f6f8;
  color: #2d3748;
  text-align: center;
}

/* Header */
header {
  background: #ffffff;
  padding: 50px 20px;
  border-bottom: 1px solid #e2e8f0;
}

header h1 {
  font-size: 2.2rem;
  color: #2b6cb0; /* azul suave */
  margin-bottom: 10px;
}

header p {
  color: #718096;
}

/* Sección */
.proyectos {
  display: flex;
  justify-content: center;
  gap: 25px;
  padding: 40px 20px;
  flex-wrap: wrap;
}

/* Cards */
.card {
  background: #ffffff;
  padding: 25px;
  width: 260px;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.04);
  transition: all 0.25s ease;
  cursor: pointer;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.08);
  border-color: #cbd5e0;
}

/* Títulos */
.card h2 {
  color: #2b6cb0;
  margin-bottom: 10px;
}

/* Texto */
.card p {
  color: #4a5568;
  font-size: 0.95rem;
}

.card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

/* Footer */
footer {
  margin-top: 40px;
  padding: 25px;
  font-size: 0.85rem;
  color: #a0aec0;
}