

  .video-player {
    width: 100%;
    max-width: 1000px;
  }
  .video {
    width: 100%;
  }
  .controls__button {
    background: none;
    border: 0;
    line-height: 1;
    color: white;
    text-align: center;
    outline: 0;
    padding: 0;
    cursor: pointer;
    max-width: 50px;
  }
  .controls__slider {
    width: 10px;
    height: 30px;
  }
  .controls {
    display: flex;
    position: absolute;
    bottom: 0;
    width: 100%;
    flex-wrap: wrap;
    background: rgba(0,0,0,0.1);
    transform: translateY(0);
  }
  .controls > * {
    flex: 1;
  }
  .progress {
    flex: 10;
    position: relative;
    display: flex;
    flex-basis: 100%;
    height: 5px;
    /* background: rgba(0,0,0,0.5); */
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    height: 10px;
  }
  
  .progress__filled {
    width: 0%;
    background: #00ff40;
    flex: 0;
    flex-basis: 0%;
  }
  
  input[type=range] {
    -webkit-appearance: none;
    background: transparent;
    width: 100%;
    margin: 0 5px;
  }
  input[type=range]:focus {
    outline: none;
  }
  input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 8.4px;
    cursor: pointer;
    background: rgba(255,255,255,0.8);
    border-radius: 4px;
  }
  input[type=range]::-webkit-slider-thumb {
    height: 0.9rem;
    width: 0.9rem;
    border-radius: 50px;
    background: #00ff40;
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -3.5px;
  }
  input[type=range]::-moz-range-track {
    width: 100%;
    height: 8.4px;
    cursor: pointer;
    background: rgba(255,255,255,0.8);
    border-radius: 4px;
  }
  input[type=range]::-moz-range-thumb {
    height: 0.9rem;
    width: 0.9rem;
    border-radius: 50px;
    background: #00ff40;
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -3.5px;
  }
  
  .btn-cauhoi{
	margin: 0.15em;
	margin-bottom: 0.3em;
	font-size: 1.2em;
	width: 3.1em;
  }
	
   .flag1 {
	   background: #E5E8E8;
	}
	
	.trong01 {
	   width: 0%;
	}
	
	.trong02 {
	   width: 0%;
	}
	
	.diem01 {
	   background: #E5E8E8;
	}	
	.diem02 {
	   background: #E5E8E8;
	}	
	.diem1 {
	   background: #E5E8E8;
	}
	.diem2 {
	   background: #E5E8E8;
	}
	.diem3 {
	   background: #E5E8E8;
	}
	.diem4 {
	   background: #E5E8E8;
	}
	.diem5 {
	   background: #E5E8E8;
	}
	