body {
  margin: 0;
  font-family: Arial, sans-serif;
}

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem;
  box-sizing: border-box;
}


.card {
  margin-top: 2rem;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.input {
  width: 100%;
  padding: 0.6rem;
  border: 1px solid #ccc;
  border-radius: 6px;
}

.actions {
  display: flex;
  justify-content: flex-end;
}

.btn {
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  cursor: pointer;
}

.btn-primary {
  background: #3880ff;
  color: #fff;
  border: none;
}

.msg-retorno {
  margin-top: 1rem;
  text-align: center;
  font-size: 0.95rem;
  font-weight: 500;
}

.msg-retorno.success {
  color: #2ecc71;
}

.msg-retorno.error {
  color: #e74c3c;
}

/* Responsividade */
@media (max-width: 768px) {
  .container {
    padding: 0.5rem;
  }

  .card {
    padding: 1rem;
  }

  .actions {
    flex-direction: column;
    gap: 0.5rem;
  }

  .btn {
    width: 100%;
  }
}

/* Ajuste para telas muito pequenas */
@media (max-width: 480px) {
  h2 {
    font-size: 1.4rem;
    text-align: center;
  }

  .help {
    font-size: 0.9rem;
    text-align: center;
  }

  .card {
    padding: 0.8rem;
    gap: 0.8rem;
  }

  .input {
    font-size: 0.9rem;
  }

  .btn {
    font-size: 0.95rem;
    padding: 0.5rem;
  }
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

@media (max-width: 768px) {
  header .nav {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .logo img {
    max-width: 180px;
  }
}

@media (max-width: 480px) {
  h2 {
    font-size: 1.2rem;
  }

  .card {
    padding: 0.8rem;
  }

  .input {
    font-size: 0.9rem;
  }

  .btn {
    width: 100%;
    font-size: 1rem;
  }
}