.texto-que-mexe {
	width: 100%;
	overflow: hidden;
	background-color: #000;
	border: 1px solid #ccc;
	box-sizing: border-box;
}

.texto-que-rola {
	display: inline-block;
	white-space: nowrap;
	padding:10px 0;

	animation: scroll-left 190s linear infinite;

}

@keyframes scroll-left {
  0% {
    transform: translateX(100vw);
  }
  100% {
    transform: translateX(-100%);
  }
}

.caixadevideo {
	position: relative;
	width: 100%;
	max-width: 800px;
	margin: 10px;
	padding-bottom: 56.25%;
	height: 0;
	overflow: hidden;
}

.caixadevideo iframe {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;

}

.letra {
	max-width: 800px;
	margin: 15px;
	padding: 20px;
	line-height: 1.7;
	font-family: sans-serif;
	color: #ddd;
}

.letra h3 {
	border-bottom: 1px solid #555;
	padding-bottom: 10px;
	margin-bottom: 20px;
}

.botao-voltar {
  display: inline-block;
  padding: 10px 15px;      
  margin: 20px 0;          
  background-color: #333;  
  color: white;            
  font-family: sans-serif;
  transition: background-color 0.3s; 
}

.botao-voltar:hover {
  background-color: #555;
}

.botao-musica {
  display: inline-block;
  padding: 10px 15px;      
  margin: 20px 0;          
  background-color: #333;  
  color: white;            
  font-family: sans-serif;
  transition: background-color 0.3s; 
}

.botao-musica:hover {
  background-color: #555;
}