body {
  background: #0d1117;
  color: #e6edf3;
  font-family: Arial, sans-serif;
  margin: 0;
}

.topo {
  background: #161b22;
  padding: 25px;
  text-align: center;
  border-bottom: 1px solid #30363d;
}

.topo h1 {
  margin: 0;
  font-size: 2rem;
  color: #58a6ff;
}

.container {
  max-width: 900px;
  margin: auto;
  padding: 20px;
}

.conversor, .tabela-cotacoes {
  background: #161b22;
  padding: 20px;
  border-radius: 10px;
  margin-bottom: 25px;
  border: 1px solid #30363d;
}

h2 {
  color: #58a6ff;
  margin-bottom: 15px;
}

.form-conversor {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

input, select, button {
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #30363d;
  background: #0d1117;
  color: #e6edf3;
}

button {
  grid-column: span 2;
  background: #238636;
  cursor: pointer;
  border: none;
}

button:hover {
  background: #2ea043;
}

.resultado {
  margin-top: 20px;
  background: #0d1117;
  padding: 15px;
  border-radius: 6px;
  border: 1px solid #30363d;
}

table {
  width: 100%;
  border-collapse: collapse;
}

table th, table td {
  padding: 12px;
  border: 1px solid #30363d;
}

table th {
  background: #21262d;
}

.rodape {
  text-align: center;
  padding: 20px;
  background: #161b22;
  border-top: 1px solid #30363d;
  margin-top: 20px;
}