/* === VARIÁVEIS DE CORES === */
:root {
  --background: #ebf5e9;
  --primary: #264624;
  --gold: #64B307;
  --spicy: #4a9006;
  --off-white: #f7f7f7;
  --white: #ffffff;
  --text-dark: #333333;
}

/* === RESET E AJUSTES GLOBAIS === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Open Sans', sans-serif;
  background-color: var(--background);
  color: var(--text-dark);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px; /* evita colar nas bordas em telas pequenas */
}

.login-wrapper {
  width: 100%;
  max-width: 400px;
}

.login-box {
  background-color: var(--off-white);
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  padding: 40px 30px;
  text-align: center;
}

.login-box h1 {
  font-family: 'Roboto Slab', serif;
  font-size: 1.8em;
  color: var(--primary);
  margin-bottom: 10px;
}

.login-box h1 span {
  color: var(--gold);
}

.login-box p {
  font-size: 1em;
  color: var(--spicy);
  margin-bottom: 25px;
}

.input-group {
  text-align: left;
  margin-bottom: 20px;
}

.input-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  color: var(--primary);
}

.input-group input {
  width: 100%;
  padding: 10px 12px;
  border: 2px solid var(--gold);
  border-radius: 6px;
  font-size: 1em;
  background-color: var(--white);
  color: var(--primary);
}

.input-group input:focus {
  outline: none;
  border-color: var(--primary);
}

.btn {
  display: block;
  width: 100%;
  background-color: var(--gold);
  color: var(--white);
  border: none;
  padding: 12px;
  border-radius: 6px;
  font-size: 1em;
  font-weight: bold;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.btn:hover {
  background-color: var(--spicy);
}

.error-message {
  display: none;
  margin-top: 15px;
  color: red;
  font-weight: bold;
}

/* === RESPONSIVIDADE === */

/* Celulares pequenos */
@media (max-width: 480px) {
  .login-box {
    padding: 25px 18px;
  }

  .login-box h1 {
    font-size: 1.5em;
  }

  .login-box p {
    font-size: 0.9em;
  }

  .btn {
    font-size: 0.9em;
    padding: 10px;
  }

  .back-button {
    top: 15px;
    left: 15px;
    padding: 8px 12px;
    font-size: 0.85em;
  }
}

/* Tablets médios */
@media (min-width: 481px) and (max-width: 768px) {
  .login-box {
    padding: 35px 25px;
  }

  .login-box h1 {
    font-size: 1.6em;
  }
}

/* Estilo para o botão de voltar */
.back-button {
  position: absolute;
  top: 20px;
  left: 20px;
  background-color: var(--gold);
  color: var(--white);
  text-decoration: none;
  padding: 10px 15px;
  border-radius: 8px;
  font-weight: 600;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.back-button:hover {
  background-color: var(--spicy);
  transform: translateY(-2px);
}