html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #14213d;
  color: #fdf6e3;
  font-family: Arial, Helvetica, sans-serif;
}

#inicio {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 16px;
  text-align: center;
  background: radial-gradient(circle at 50% 30%, #23366b, #14213d);
}

#inicio h1 { font-size: clamp(32px, 6vw, 72px); margin: 0; color: #fbc02d; }
#inicio .subtitulo { font-size: clamp(22px, 4vw, 44px); margin: 0; }
#inicio .ajuda { font-size: clamp(16px, 2vw, 24px); opacity: 0.85; }
#inicio .credito { font-size: 14px; opacity: 0.6; }
#inicio a { color: #fbc02d; }

#comecar, #entrar {
  font-size: clamp(24px, 4vw, 48px);
  padding: 16px 48px;
  border: 0;
  border-radius: 999px;
  background: #fbc02d;
  color: #14213d;
  font-weight: bold;
  cursor: pointer;
}

#comecar:disabled, #entrar:disabled { opacity: 0.6; cursor: wait; }

.modo-sala {
  display: inline-block;
  font-size: clamp(18px, 2.5vw, 28px);
  padding: 12px 28px;
  border: 3px solid #fbc02d;
  border-radius: 999px;
  text-decoration: none;
  font-weight: bold;
}

#erro {
  max-width: 640px;
  padding: 12px 16px;
  border-radius: 12px;
  background: #c62828;
  font-size: clamp(16px, 2vw, 22px);
}

#ar {
  /* z-index cria uma camada própria: o MindAR põe o vídeo da câmera com z-index negativo,
     e sem isto ele ficaria escondido atrás do fundo da página. */
  position: relative;
  z-index: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

#legenda {
  position: absolute;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  z-index: 5;
  width: min(92vw, 1100px);
  margin: 0;
  padding: 16px 24px;
  box-sizing: border-box;
  border-radius: 20px;
  background: rgba(20, 33, 61, 0.88);
  color: #fdf6e3;
  font-size: clamp(20px, 3.2vw, 44px);
  font-weight: bold;
  text-align: center;
  line-height: 1.25;
}

#sobreposicao {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

#dica {
  position: absolute;
  left: 50%;
  top: 16px;
  transform: translateX(-50%);
  width: 90vw;
  margin: 0;
  padding: 12px 16px;
  box-sizing: border-box;
  border-radius: 16px;
  background: rgba(20, 33, 61, 0.8);
  color: #fdf6e3;
  font-size: 20px;
  font-weight: bold;
  text-align: center;
}

#sair {
  position: absolute;
  right: 16px;
  bottom: 24px;
  padding: 12px 24px;
  border: 0;
  border-radius: 999px;
  background: #fdf6e3;
  color: #14213d;
  font-size: 18px;
  font-weight: bold;
  pointer-events: auto;
}

[hidden] { display: none !important; }