:root {
  --primary-color: #2c3e50;
  --secondary-color: #3498db;
  --text-color: #333;
  --background-color: #ecf0f1;
  --accent-color: #e74c3c;
  --card-bg: #fff;
  --header-bg: #34495e;
  --freelancer-color: #f39c12;
  --fulltime-color: #27ae60;
}

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

body {
  font-family: 'Roboto', 'Arial', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background-color);
  transition: background-color 0.3s ease;
}

header {
  background-color: var(--header-bg);
  color: #fff;
  padding: 1rem 0;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

nav ul {
  list-style-type: none;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

nav ul li {
  margin: 0 15px;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s ease;
  font-size: 1rem;
}

nav ul li a:hover {
  color: var(--secondary-color);
}

main {
  max-width: 1200px;
  margin: 80px auto 0;
  padding: 20px;
}

section {
  margin-bottom: 60px;
  background-color: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  padding: 30px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

section:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

h1, h2 {
  color: var(--primary-color);
}

h1 {
  font-size: 2.5em;
  margin-bottom: 20px;
  border-bottom: 3px solid var(--secondary-color);
  padding-bottom: 10px;
}

h2 {
  font-size: 2em;
  border-bottom: 2px solid var(--secondary-color);
  padding-bottom: 10px;
  margin-top: 0;
  margin-bottom: 20px;
}

.job {
  margin-bottom: 30px;
  padding: 20px;
  background-color: #f8f9fa;
  border-radius: 8px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border-left: 4px solid var(--secondary-color);
}

.job:hover {
  transform: translateX(5px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.job h3 {
  color: var(--secondary-color);
  margin-bottom: 10px;
}

.job-type {
  display: inline-block;
  padding: 3px 8px;
  color: #fff;
  border-radius: 4px;
  font-size: 0.8em;
  margin-bottom: 5px;
}

.job-type.freelancer {
  background-color: var(--freelancer-color);
}

.job-type.fulltime {
  background-color: var(--fulltime-color);
}

.job-period {
  font-style: italic;
  color: #666;
  margin-bottom: 10px;
}

#habilidades {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

#habilidades h2 {
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  text-align: center;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.skill-category {
  background-color: var(--secondary-color);
  padding: 1rem;
  border-radius: 8px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-category:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.skill-category h3 {
  color: #fff;
  margin-bottom: 0.5rem;
  font-size: 1.1em;
  border-bottom: 2px solid rgba(255, 255, 255, 0.3);
  padding-bottom: 0.3rem;
}

.skill-category ul {
  list-style-type: none;
  padding: 0;
}

.skill-category li {
  color: #fff;
  margin-bottom: 0.3rem;
  font-size: 0.9em;
}

.education {
  background-color: #f8f9fa;
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 15px;
  border-left: 4px solid var(--accent-color);
}

.education h3 {
  color: var(--primary-color);
  margin-bottom: 10px;
}

#contato {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
}

#contato p {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
  background-color: #f8f9fa;
  padding: 10px 15px;
  border-radius: 8px;
  transition: all 0.3s ease;
}

#contato p:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

#contato i {
  margin-right: 10px;
  color: var(--secondary-color);
  font-size: 1.2em;
}

#contato a {
  color: var(--text-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

#contato a:hover {
  color: var(--secondary-color);
}

footer {
  text-align: center;
  padding: 20px;
  background-color: var(--primary-color);
  color: #fff;
  margin-top: 40px;
}

@media (max-width: 768px) {
  header {
    position: relative;
  }

  main {
    margin-top: 20px;
  }

  nav ul {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
  }

  nav ul li {
    margin: 5px 10px;
  }

  nav ul li a {
    font-size: 0.9rem;
  }

  h1 {
    font-size: 2em;
  }

  h2 {
    font-size: 1.5em;
  }

  .job, .education {
    padding: 15px;
  }

  #contato {
    flex-direction: column;
  }

  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

section {
  animation: fadeIn 1s ease-out;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --text-color: #ecf0f1;
    --background-color: #2c3e50;
    --card-bg: #34495e;
    --header-bg: #2c3e50;
    --job-bg: #2c3e50;
    --education-bg: #2c3e50;
    --contact-bg: #34495e;
  }

  body {
    background-color: var(--background-color);
    color: var(--text-color);
  }

  .job, .education {
    background-color: var(--job-bg);
    border-left-color: var(--secondary-color);
  }

  #contato p {
    background-color: var(--contact-bg);
  }

  h1, h2, h3 {
    color: var(--primary-color);
  }

  .job h3 {
    color: var(--secondary-color);
  }

  .skill-category {
    background-color: var(--card-bg);
  }

  .skill-category h3, .skill-category li {
    color: var(--text-color);
  }

  #contato a {
    color: var(--text-color);
  }

  #contato a:hover {
    color: var(--secondary-color);
  }

  #contato i {
    color: var(--secondary-color);
  }

  #contato p:hover {
    background-color: var(--primary-color);
  }

  .job-period, p {
    color: #bdc3c7;
  }

  nav ul li a {
    color: #ecf0f1;
  }

  nav ul li a:hover {
    color: var(--secondary-color);
  }
}