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

/* ------------------------------
   ESTILOS GENERALES
------------------------------ */

body {
  font-family: 'Poppins', sans-serif;
  background: #f7f7f7;
  color: #333;
  line-height: 1.7;
}

/* Fuente Poppins */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

/* ------------------------------
   HEADER
------------------------------ */

header {
  background: white;
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

header h2 {
  font-weight: 700;
  margin: 0;
}

header nav a {
  margin-left: 20px;
  text-decoration: none;
  color: #333;
  font-weight: 500;
  transition: 0.3s;
}

header nav a:hover {
  color: #0d6efd; /* color primario de Bootstrap */
}

/* ------------------------------
   SECCIÓN SOBRE MÍ
------------------------------ */

#sobre-mi h1 {
  font-weight: 700;
  letter-spacing: -1px;
}

#sobre-mi .card {
  border: none;
  border-radius: 20px;
  background: white;
}

#sobre-mi img {
  border: 4px solid #0d6efd;
}

/* ------------------------------
   CARDS DE PROYECTOS
------------------------------ */

.card {
  border: none;
  border-radius: 18px;
  overflow: hidden;
  transition: 0.3s;
}

.card img {
  height: 200px;
  object-fit: cover;
}

.card:hover {
  transform: translateY(-7px);
  box-shadow: 0 15px 28px rgba(0,0,0,0.15);
}

/* Títulos de card */
.card-title {
  font-weight: 600;
}

/* Botones */
.btn-primary {
  border-radius: 30px;
  padding: 8px 18px;
  font-weight: 500;
}

/* ------------------------------
   CONTACTO
------------------------------ */

#contacto {
  padding: 70px 0;
  text-align: center;
  background: #fff;
  margin-top: 40px;
  border-top: 1px solid #e3e3e3;
}

#contacto h2 {
  font-weight: 700;
  margin-bottom: 20px;
}

/* ------------------------------
   FOOTER
------------------------------ */

footer {
  background: #0d6efd;
  color: white;
  padding: 20px;
  text-align: center;
  margin-top: 40px;
  font-weight: 400;
}

/* ------------------------------
   RESPONSIVE
------------------------------ */

@media (max-width: 768px) {
  header {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }

  header nav a {
    margin-left: 10px;
  }

  .card img {
    height: 170px;
  }
}