* {
  box-sizing: border-box;
}


body {
  background-color: rgb(15, 13, 12);
  font-family: "Fira Sans", sans-serif;
}

.navbar {
  background-color: rgb(15, 13, 12);;
}

.navbar-brand {
  font-weight: 700;
  font-size: 2rem;
}

.nav-link {
  font-weight: 300;
  font-size: 1.3rem;
}

.nav-link:hover {
  background-color: #262626;
  color: #fff;
}

.nav-link.active {
  background-color: rgb(64, 64, 64);
  font-weight: 500;
}

.navbar-nav a {
  border-radius: 8px;
}

main {
  margin-top: 12rem;
}

#about {
  margin-bottom: 12rem;
}

.greetings, .about-me{
  font-size: 1.5rem;
  font-weight: 300;
}

.name {
  font-size: 5rem;
  font-weight: 600;
}

.about-me {
  margin-bottom: 3rem;
  line-height: 2.2rem;
}

.social a{
  transition: all 0.5s;
}

.social a:hover{
  background-color: rgb(48, 48, 48);;
} 

#tools {
  margin-bottom: 12rem;
}

#experience {
  margin-bottom: 12rem !important;
}

#project {
  margin-bottom: 6rem !important;
}

.tech-stack, .projects, .experience {
  font-weight: 700;
  font-size: 2.5rem;
  margin-bottom: 5rem !important; 
}

#project .card-body, #experience .card-body{
  background-color: rgb(31, 31, 31);
  color: #fff;
}

.card-title {
  font-weight: 700;
  font-size: 2rem;
  margin-bottom: 1rem;
}

.card-text {
  line-height: 1.5rem;
  margin-bottom: 1rem;
}

footer {
  padding: 3rem 0;
}


@media (max-width: 768px) {
  main {
    margin-top: 10rem;
    text-align: center;
  }

  .navbar-brand {
    font-size: 1.8rem;
  }

  .nav-link {
    font-size: 1.1rem;
    text-align: center;
  }

  #about {
    margin-bottom: 5rem;
  }

  .greetings, .about-me {
    font-size: 1.1rem;
  }

  .name {
    font-size: 3rem;
  }

  .about-me {
    line-height: 1.8;
    margin-bottom: 2.5rem;
  }

  .social {
    flex-direction: column;
    gap: 1.5rem !important;
    align-items: center;
    justify-content: center;
  }

  .social a {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }

  #tools {
    margin-bottom: 5rem;
  }

  .tech-stack, .experience, .projects {
    font-size: 2.2rem;
    margin-bottom: 2rem !important;
  }

  .col-4 {
    flex: 0 0 50%;
    max-width: 50%;
  }

  .col-4 img {
    height: 40px !important;
  }

  .col-4 p {
    font-size: 0.9rem;
  }

  .card-title {
    font-size: 1.6rem;
  }

  .card-text {
    font-size: 0.95rem;
    line-height: 1.4;
  }

  .card-body {
    padding: 2rem !important;
  }

  footer p {
    text-align: center;
  }
}