.btn_cen_screen{
    height: 100vh;          /* hoặc 100dvh nếu muốn chuẩn mobile mới */
    min-height: 100vh;
    display: flex;
    align-items: center;     /* center dọc */
    justify-content: center; /* center ngang */
    padding: 0 !important;
    margin: 0 !important;
}

/* ===============================
   FLOAT SOUND BUTTON
================================ */
.float-sound-btn{
  position: fixed;
  right: 25px;
  bottom: 90px;
  z-index: 9999999;

  width: 46px;
  height: 46px;
  border-radius: 999px;
  border: 0;

  display: none;                 /* JS toggle */
  align-items: center;
  justify-content: center;

  background: rgba(0,0,0,.6);
  backdrop-filter: blur(3px);
  color: #fff;
  cursor: pointer;

  transition: transform .15s ease, background .15s ease;
}

/* show button */
.float-sound-btn.is-show{
  display: flex;
}

/* touch feedback */
.float-sound-btn:active{
  transform: scale(.9);
}

/* ===============================
   ICON BASE (FA4)
================================ */
.float-sound-btn i{
  font-size: 22px;
  color: #fff;
  line-height: 1;
  text-shadow:
    0 1px 3px rgba(0,0,0,.9),
    0 0 6px rgba(0,0,0,.6);
}

/* ===============================
   MUTE ICON (loa + gạch chéo đỏ)
================================ */
.mute-slash-wrap{
  position: relative;
  display: inline-block;
}

/* gạch chéo đỏ */
.mute-slash-wrap::after{
  content: "";
  position: absolute;
  left: -6px;
  top: 50%;
  width: 34px;
  height: 4px;

  background: #ff2d2d;
  border-radius: 3px;

  transform: translateY(-50%) rotate(-35deg);
  box-shadow: 0 0 6px rgba(0,0,0,.6);
}

/* ===============================
   TOGGLE STATE
================================ */
.float-sound-btn .icon-on{
  display: none;
}
.float-sound-btn.on .icon-on{
  display: inline-block;
}
.float-sound-btn.on .icon-off{
  display: none;
}

/* ===============================
   MOBILE OPTIMIZE
================================ */
@media (max-width: 768px){
  .float-sound-btn i{
    font-size: 26px;
  }
  .mute-slash-wrap::after{
    width: 38px;
    height: 4px;
  }
}



 
  
 .livideo .thumb{
	 background: #000;		 
 }
 
.thumb {
  position: relative;
  width: 100%;
  height: 700px;  /* Đảm bảo chiều cao của video đủ lớn */
  background-color: #fff;
}

.thumb_video {
  width: 100%;
  height: 100%;
  background-position: center center;
  background-size: cover;
}

.bigVideoIndicator {
  z-index: -1;
}

.info_overlay {
    position: absolute;
    /* bottom: 70px; */
    left: 0px;
    right: 50px;
    color: white;
    display: flex;
    justify-content: center;
    align-items: normal;
    flex-direction: column;
    top: 115px;
    z-index: 99;
}

.buttons {
	display: flex;
	flex-direction: column;
	align-items: flex-end;
	bottom: 350px;
	position: absolute;
	right: 0px;
}

.buttons button {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
  font-size: 18px;
  margin: 5px;
  border-radius: 50%;
  width: 50px;
  height: 50px;
}

.buttons button:hover {
  background: rgba(255, 255, 255, 0.3);
}

.item_flex_user_left__textname {
    font-size: 9pt;  
    color: #f5f5f5;; 
}
.item_flex_user_left__texttime { 
    color: #e3e3e3; 
}
.tpointclick { 
    margin-right: 10px;
}
.mtop{
	background: #080808;
    margin-top: 100px;
}
.hide_infoyt{
    width: 100%;
    height: 114px;
    background: #000000;
    position: absolute;
    top: calc(0vh - -0px);
    z-index: 99;	
}

/* Dành cho màn hình nhỏ hơn 576px (Mobile) */
@media (max-width: 400px) {
.video-container iframe, .video-container object, .video-container embed {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 78%;
}	
	.thumb {
	  position: relative;
	  width: 100%;
	  height: 700px;  /* Đảm bảo chiều cao của video đủ lớn */
	}
	
	.info_overlay {
		position: absolute;
		/* bottom: 70px; */
		left: 0px;
		right: 50px;
		color: white;
		display: flex;
		justify-content: center;
		align-items: normal;
		flex-direction: column;
		top: 50px;
		z-index: 99;
	}

	.buttons {
		display: flex;
		flex-direction: column;
		align-items: flex-end;
		bottom: 290px;
		position: absolute;
		right: 0px;
	}

	.buttons button {
	  background: rgba(255, 255, 255, 0.1);
	  border: none;
	  color: white;
	  font-size: 18px;
	  margin: 5px;
	  border-radius: 50%;
	  width: 50px;
	  height: 50px;
	}

	.buttons button:hover {
	  background: rgba(255, 255, 255, 0.3);
	}

	.item_flex_user_left__textname {
		font-size: 9pt;  
		color: #f5f5f5;; 
	}
	.item_flex_user_left__texttime { 
		color: #e3e3e3; 
	}
	.tpointclick { 
		margin-right: 10px;
	}
	.mtop{
		background: #080808;
		margin-top: 50px;
	}
	.hide_infoyt{
		width: 100%;
		height: 114px;
		background: #000000;
		position: absolute;
		top: calc(0vh - -0px);
		z-index: 99;	
	}
}

/* Dành cho màn hình từ 576px đến 768px (Tablet) */
@media (min-width: 410px) and (max-width: 768px) {
	.info_overlay {
        position: absolute;
        /* bottom: 70px; */
        left: 0px;
        right: 50px;
        color: white;
        display: flex
;
        justify-content: center;
        align-items: normal;
        flex-direction: column;
        top: 75px;
        z-index: 99;
	}

	.buttons {
		display: flex;
		flex-direction: column;
		align-items: flex-end;
		bottom: 350px;
		position: absolute;
		right: 0px;
	}

	.buttons button {
	  background: rgba(255, 255, 255, 0.1);
	  border: none;
	  color: white;
	  font-size: 18px;
	  margin: 5px;
	  border-radius: 50%;
	  width: 50px;
	  height: 50px;
	}

	.buttons button:hover {
	  background: rgba(255, 255, 255, 0.3);
	}

	.item_flex_user_left__textname {
		font-size: 9pt;  
		color: #f5f5f5;; 
	}
	.item_flex_user_left__texttime { 
		color: #e3e3e3; 
	}
	.tpointclick { 
		margin-right: 10px;
	}
	.mtop{
		background: #080808;
		margin-top: 70px;
	}
    .hide_infoyt {
        width: 100%;
        height: 114px;
        background: #000000;
        position: absolute;
        top: calc(0vh - -0px);
        z-index: 99;
    }
}

/* Dành cho màn hình lớn hơn 768px (Desktop) */
@media (min-width: 769px) {
    .responsive-class {
        background-color: #ccccff;
        font-size: 18px;
    }
}