* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: #f4f1ec;
  color: #1e1e1e;
  font-family: Arial, Helvetica, sans-serif;
}

header {
  max-width: 1200px;
  margin: auto;
  padding: 3rem 3rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav a {
  background-color: #c72812;
  color: white;
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: bold;
  letter-spacing: 0.15rem;
  padding: 1rem 1.4rem;
  margin-right: 0.4rem;
  display: inline-block;
}

main {
  max-width: 1200px;
  margin: auto;
  padding: 0 3rem;
}

.presentacion {
  margin-top: 2rem;
}

h1 {
  color: #c72812;
  font-size: 8rem;
  line-height: 0.78;
  letter-spacing: -0.4rem;
  margin: 0 0 2rem;
  font-weight: 900;
}

.avatar {
  width: 520px;
  max-width: 100%;
  display: block;
  filter: grayscale(100%);
}

.sobre-mi,
.intereses {
  border-top: 1px solid #c72812;
  margin-top: 3rem;
  padding-top: 2rem;
}

h2 {
  color: #c72812;
  font-size: 2.2rem;
  margin: 0 0 1.5rem;
  font-weight: 900;
}

p {
  font-size: 1rem;
  line-height: 1.5;
  max-width: 430px;
}

.contenedor-intereses {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  text-align: center;
}

article {
  padding: 1rem;
  border-right: 1px solid #c72812;
}

article:last-child {
  border-right: none;
}

h3 {
  color: #c72812;
  letter-spacing: 0.2rem;
  font-size: 1rem;
}

footer {
  max-width: 1200px;
  margin: 3rem auto 0;
  padding: 2rem 3rem;
  border-top: 1px solid #c72812;
  display: flex;
  justify-content: center;
  gap: 3rem;
  color: #1e1e1e;
  font-size: 0.7rem;
  letter-spacing: 0.3rem;
}

@media (max-width: 768px) {

  header {
    padding: 2rem 1.5rem 1rem;
    align-items: flex-start;
  }

  nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
  }

  nav a {
    font-size: 0.65rem;
    padding: 0.8rem 1rem;
    margin: 0;
  }

  main {
    padding: 0 1.5rem;
  }

  h1 {
    font-size: 4.2rem;
    letter-spacing: -0.2rem;
    line-height: 0.82;
  }

  .avatar {
    width: 100%;
  }

  h2 {
    font-size: 1.8rem;
  }

  .contenedor-intereses {
    grid-template-columns: 1fr;
    text-align: left;
    gap: 0;
  }

  article {
    border-right: none;
    border-bottom: 1px solid #c72812;
    padding: 1.5rem 0;
  }

  article:last-child {
    border-bottom: none;
  }

  footer {
    padding: 2rem 1.5rem;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
    text-align: center;
  }
}