/* ==========================================================================
   TÍNH NĂNG ÂM THANH / NHẠC NỀN (AUDIO BACKGROUND PLAYER)
   ========================================================================== */

/* 1. HIỆU ỨNG SÓNG ÂM KHI ĐANG PHÁT NHẠC */
.menu-phai-sub-btn.audio-playing {
	border-color: #10b981 !important;
	color: #10b981 !important;
	background: rgba(16, 185, 129, 0.2) !important;
	box-shadow: 0 0 16px rgba(16, 185, 129, 0.4) !important;
	animation: audioPulse 2s infinite ease-in-out;
}

@keyframes audioPulse {
	0% {
		box-shadow: 0 0 8px rgba(16, 185, 129, 0.3);
	}
	50% {
		box-shadow: 0 0 20px rgba(16, 185, 129, 0.65), 0 0 30px rgba(16, 185, 129, 0.3);
	}
	100% {
		box-shadow: 0 0 8px rgba(16, 185, 129, 0.3);
	}
}

/* Biểu tượng loa khi tắt */
.audio-muted svg {
	opacity: 0.7;
}

/* 2. THÔNG BÁO NHỎ KHI BẬT/TẮT NHẠC (AUDIO TOAST) */
.audio-toast-msg {
	position: fixed;
	bottom: 85px;
	right: 85px;
	background: rgba(15, 23, 42, 0.92);
	backdrop-filter: blur(10px);
	-webkit-backdrop-filter: blur(10px);
	border: 1px solid rgba(255, 255, 255, 0.15);
	color: #ffffff;
	padding: 8px 16px;
	border-radius: 20px;
	font-size: 13px;
	font-weight: 600;
	z-index: 10002;
	box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
	display: flex;
	align-items: center;
	gap: 8px;
	opacity: 0;
	transform: translateY(10px) scale(0.9);
	pointer-events: none;
	transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.audio-toast-msg.show {
	opacity: 1;
	transform: translateY(0) scale(1);
}

@media screen and (max-width: 768px) {
	.audio-toast-msg {
		bottom: calc(75px + env(safe-area-inset-bottom, 0px));
		right: calc(20px + env(safe-area-inset-right, 0px));
		font-size: 12px;
		padding: 6px 12px;
	}
}