/* Reset e Fonte */
body {
  margin: 0;
  padding: 0;
  font-family: 'Open Sans', sans-serif;
  /* Fundo moderno com imagem ou gradiente rico */
  background: url('https://images.unsplash.com/photo-1625246333195-5848c428218e?ixlib=rb-1.2.1&auto=format&fit=crop&w=1950&q=80') center/cover no-repeat fixed;
  height: 100vh;
  overflow: hidden;
  /* Evita barras de rolagem desnecessárias */
}

/* Camada escura sobre a imagem para dar leitura */
.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(20, 80, 40, 0.85), rgba(33, 150, 243, 0.75));
  z-index: 0;
}

/* Container Principal que centraliza o formulário */
.login-wrapper {
  position: relative;
  /* Importante para o z-index */
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

/* Botão de Voltar Flutuante */
.btn-back-floating {
  position: absolute;
  top: 30px;
  left: 30px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  padding: 10px 20px;
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  z-index: 10;
}

.btn-back-floating:hover {
  background: white;
  color: #2d8a4e;
  /* Verde Embrapa */
  text-decoration: none;
  transform: translateX(-5px);
  /* Efeitinho de movimento */
}

/* Caixa de Login (Glassmorphism) */
.login-box {
  background: rgba(255, 255, 255, 0.95);
  /* Quase sólido para legibilidade */
  padding: 40px;
  border-radius: 20px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
  width: 100%;
  max-width: 420px;
  position: relative;
  border-top: 5px solid #4CAF50;
  /* Detalhe verde no topo */
}

/* Logo */
.logo {
  display: block;
  max-width: 200px;
  margin: 0 auto 30px;
  height: auto;
}

/* Inputs */
.form-control {
  background-color: #f8f9fa;
  border: 2px solid #e9ecef;
  border-radius: 10px;
  padding: 20px 15px;
  /* Mais altura para toque */
  height: auto;
  font-size: 0.95rem;
}

.form-control:focus {
  background-color: white;
  border-color: #4CAF50;
  box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
}

/* Botões */
.btn-primary {
  background-color: #4CAF50;
  border: none;
  border-radius: 50px;
  padding: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  transition: transform 0.2s;
}

.btn-primary:hover {
  background-color: #43a047;
  transform: translateY(-2px);
}

/* Links */
a {
  color: #2196F3;
  font-weight: 600;
}

a:hover {
  color: #1976D2;
  text-decoration: none;
}