:root {
  --azul: #0d6efd;
  --preto: #0f172a;
  --branco: #ffffff;
  --cinza: #e5e7eb;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background: var(--branco);
  color: var(--preto);
  line-height: 1.6;
}


header {
  background: linear-gradient(135deg, var(--preto), var(--azul));
  color: var(--branco);
  padding: 3rem 1rem;
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
}

header p {
  margin-top: 0.5rem;
  font-size: 1.2rem;
  opacity: 0.9;
}


nav {
  background: var(--preto);
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  padding: 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

nav a {
  color: var(--branco);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

nav a:hover {
  color: var(--azul);
}


section {
  max-width: 1100px;
  margin: auto;
  padding: 4rem 1.5rem;
}

section h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--azul);
}


.skills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.skill-card {
  background: var(--cinza);
  padding: 1.5rem;
  border-radius: 12px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}

.skill-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}


.projetos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.projeto {
  border: 1px solid var(--cinza);
  border-radius: 12px;
  padding: 1.5rem;
  transition: transform 0.3s;
}

.projeto:hover {
  transform: scale(1.02);
}


footer {
  background: var(--preto);
  color: var(--branco);
  text-align: center;
  padding: 2rem 1rem;
}

footer p {
  opacity: 0.8;
}


@media (max-width: 600px) {
  header h1 {
    font-size: 2rem;
  }

  nav {
    flex-wrap: wrap;
    gap: 1rem;
  }
}