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

body {
  font-family: "Segoe UI", Arial, sans-serif;
  background: #f4f6fa;
  color: #333;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

/* ===== CABEÇALHO ===== */
header {
  text-align: center;
  padding: 40px 20px;
  background: linear-gradient(135deg, #2c3e50, #4a69bd);
  color: #fff;
  position: relative;
  height: 250px;}

header img {
  position: relative;
  width: 200px;
  height: 190px;
  border-radius: 50%;
  float: right;
  margin: 20px;
  margin-top: -140px;

}

header h1 {
  margin-top: 50px;
  font-size: 2.5rem;
  margin-bottom: 10px;
}

header h2 {
  font-size: 1.2rem;
  font-weight: normal;
  color: #e1e1e1;
}


/* ===== SEÇÕES ===== */
main {
  flex: 1;
  max-width: 1200px;
  width: 90%;
  margin: 40px auto;
}

main h1 {
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: #2c3e50;
  border-left: 6px solid #4a69bd;
  padding-left: 10px;
}

/* ===== ATIVIDADES ===== */
section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.atividade {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s, box-shadow 0.2s, background 0.3s;
}

.atividade:hover {
  transform: translateY(-6px);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.15);
}

#caixa_titulo p {
  font-weight: bold;
  font-size: 1.1rem;
  color: #2c3e50;
  margin-bottom: 12px;
}

#caixa_links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#caixa_links a {
  text-decoration: none;
  color: #4a69bd;
  font-weight: 500;
  border: 1px solid #4a69bd;
  padding: 8px 10px;
  border-radius: 8px;
  text-align: center;
  transition: all 0.2s;
}

#caixa_links a:hover {
  background: #4a69bd;
  color: #fff;
}