:root {
  --cor-primaria: #1976d2;
  --cor-fundo: #f4f6f8;
  --borda-radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: var(--cor-fundo);
  color: #333;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

main {
  width: 100%;
  max-width: 700px;
  padding: 20px;
  margin: 0 auto;
}

h1 {
  text-align: center;
  color: var(--cor-primaria);
  margin-bottom: 10px;
  font-size: 22px;
}

p {
  text-align: center;
  margin-bottom: 20px;
  color: #555;
  font-size: 16px;
}

form {
  background-color: #fff;
  padding: 20px;
  border-radius: var(--borda-radius);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.form-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 10px;
}

label {
  font-weight: 600;
  margin-bottom: 5px;
}

input {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: var(--borda-radius);
  width: 100%;
}

input:focus {
  border-color: var(--cor-primaria);
  outline: none;
}

button {
  align-self: center;
  padding: 12px 24px;
  font-size: 16px;
  background-color: var(--cor-primaria);
  color: #fff;
  border: none;
  border-radius: var(--borda-radius);
  cursor: pointer;
  transition: background-color 0.3s ease;
  margin-top: 10px;
}

button:hover {
  background-color: #135ba1;
}

#iniciarLeitura {
  margin: 0 auto;
  display: block;
  padding: 12px 25px;
  background-color: var(--cor-primaria);
  color: white;
  border: none;
  border-radius: var(--borda-radius);
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s;
}

#iniciarLeitura:hover {
  background-color: #135ba1;
}

.botao-centralizado {
  margin: 0 auto;
  display: block;
  padding: 12px 25px;
  background-color: var(--cor-primaria);
  color: white;
  border: none;
  border-radius: var(--borda-radius);
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.botao-centralizado:hover {
  background-color: #135ba1;
}


#video {
  width: 100%;
  max-width: 400px;
  height: auto;
  margin: 20px auto 0;
  border: 1px solid #ccc;
  border-radius: var(--borda-radius);
  display: none;
}

#readerStatus {
  text-align: center;
  font-weight: bold;
  margin-top: 10px;
  color: #007bff;
}

#cameraSelect {
  width: 100%;
  padding: 10px;
  margin-top: 10px;
  border: 1px solid #ccc;
  border-radius: var(--borda-radius);
  font-size: 15px;
  background-color: #fff;
  color: #333;
}

#cameraSelect:focus {
  border-color: var(--cor-primaria);
  outline: none;
}

.modal {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 999;
  background-color: rgba(0, 0, 0, 0.6);
  width: 100%;
  height: 100%;
}

.modal-content {
  background-color: #fff;
  width: 400px;
  max-width: 90%;
  padding: 20px;
  border-radius: 8px;
  position: relative;
  margin: auto;
}

.video {
  width: 100%;
  border-radius: var(--borda-radius);
  margin-top: 10px;
}

.close {
  float: right;
  font-size: 24px;
  font-weight: bold;
  color: #888;
  cursor: pointer;
}

footer {
  margin-top: 40px;
  font-size: 14px;
  text-align: center;
  color: #666;
}

footer a {
  color: #333;
  text-decoration: none;
}