/* src/style.css */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  background: #f5f7fa;
  color: #333;
}

main {
  max-width: 400px;
  margin: 5% auto;
  background: #fff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

h1 {
  font-size: 1.8rem;
  text-align: center;
  margin-bottom: 1.5rem;
}

select, input[type="number"] {
  width: 100%;
  padding: 0.6rem;
  margin-bottom: 1rem;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 1rem;
}

#inputs-container input {
  margin-bottom: 0.8rem;
}

#btn-calcular {
  display: block;
  width: 100%;
  padding: 0.8rem;
  background: #4a90e2;
  color: #fff;
  font-size: 1rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s ease;
}

#btn-calcular:hover {
  background: #357abd;
}

/* botão 4ª prova */
#btn-calc-fourth {
  display: block;
  width: 100%;
  padding: 0.8rem;
  background: #4caf50;
  color: #fff;
  font-size: 1rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  margin-top: 0.5rem;
  transition: background 0.2s ease;
}

#btn-calc-fourth:hover {
  background: #388e3c;
}

.result-box {
  margin-top: 1.5rem;
  padding: 1rem;
  background: #f0f4ff;
  border-radius: 6px;
}

.result-box p {
  margin: 0.5rem 0;
  font-weight: bold;
}

footer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.9rem;
  color: #777;
}

footer kbd {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  margin: 0 0.2rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  background: #f5f5f5;
  font-size: 0.9rem;
  font-family: monospace;
}