body {
	margin: 0;
	padding: 0;
	background-color: #2c2c2c;
	color: #eaeaea;
	font-family:
		-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
	overflow: hidden;
	width: 100vw;
	height: 100vh;
	height: 100dvh;
	touch-action: none;
	user-select: none;
	-webkit-user-select: none;
}
#play-screen {
	position: relative;
	width: 100%;
	height: 100%;
	background-color: #333;
	cursor: crosshair;
}

#guides-container {
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	transition: all 0.3s ease;
	pointer-events: none;
}

.slide-marker {
	position: absolute;
	width: 1px;
	height: 100%;
	background: rgba(255, 255, 255, 0.15);
	pointer-events: none;
}
.harmonic-marker {
	position: absolute;
	width: 100%;
	height: 1px;
	background: rgba(255, 255, 255, 0.08);
	pointer-events: none;
}

#lip-zone {
	position: absolute;
	top: 0;
	left: 0;
	width: calc(100% / 7);
	height: 100%;
	background: rgba(255, 255, 255, 0.05);
	border-right: 1px dashed rgba(255, 255, 255, 0.3);
	display: none;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	z-index: 10;
	pointer-events: none;
}

#status-bar {
	position: absolute;
	bottom: 0;
	left: 0;
	width: 100%;
	background: #222;
	padding: 8px 15px;
	font-size: 13px;
	color: #aaa;
	box-sizing: border-box;
	display: flex;
	justify-content: space-between;
	pointer-events: none;
	z-index: 15;
}
#status-note {
	font-weight: bold;
	color: #fff;
}
#status-engine {
	margin-left: 10px;
	color: #4fc3f7;
}

#open-settings-btn {
	position: absolute;
	top: 15px;
	right: 15px;
	width: 44px;
	height: 44px;
	background: rgba(0, 0, 0, 0.5);
	border: 1px solid #555;
	border-radius: 6px;
	color: white;
	font-size: 20px;
	cursor: pointer;
	z-index: 10000;
	display: flex;
	justify-content: center;
	align-items: center;
	box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}
#open-settings-btn:active {
	background: #555;
}

/* --- 録音ボタン --- */
#record-btn {
	position: absolute;
	top: 15px;
	right: 65px;
	width: 44px;
	height: 44px;
	background: rgba(0, 0, 0, 0.5);
	border: 1px solid #555;
	border-radius: 6px;
	cursor: pointer;
	z-index: 10000;
	display: flex;
	justify-content: center;
	align-items: center;
	box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
	transition: background 0.3s;
	color: transparent;
}
#record-btn::after {
	content: '';
	position: absolute;
	width: 16px;
	height: 16px;
	background-color: #ff4757;
	border-radius: 50%;
	transition: background-color 0.3s;
}
#record-btn:active {
	background: #555;
}
#record-btn.recording::after {
	animation: rec-dot-pulse 0.8s infinite alternate;
}
@keyframes rec-dot-pulse {
	0% {
		opacity: 1;
		transform: scale(1);
	}
	100% {
		opacity: 0.3;
		transform: scale(0.9);
	}
}

#start-overlay {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: rgba(0, 0, 0, 0.7);
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	z-index: 5000;
	color: white;
	font-size: 18px;
}
.pulse-text {
	animation: pulse 1.5s infinite;
}
@keyframes pulse {
	0% {
		opacity: 0.5;
	}
	50% {
		opacity: 1;
	}
	100% {
		opacity: 0.5;
	}
}

.overlay {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: rgba(0, 0, 0, 0.8);
	display: none;
	justify-content: center;
	align-items: center;
	z-index: 15000;
}
.modal-box {
	background: #333;
	width: 90%;
	max-width: 400px;
	border-radius: 8px;
	box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
	display: flex;
	flex-direction: column;
	max-height: 90vh;
}
.tabs {
	display: flex;
	background: #222;
	border-radius: 8px 8px 0 0;
	overflow: hidden;
	flex-shrink: 0;
}
.tab-btn {
	flex: 1;
	padding: 12px 0;
	background: transparent;
	border: none;
	color: #888;
	font-size: 14px;
	cursor: pointer;
}
.tab-btn.active {
	background: #333;
	color: #fff;
	font-weight: bold;
	border-bottom: 2px solid #007aff;
}
.tab-content {
	padding: 20px;
	overflow-y: auto;
	flex: 1;
	min-height: 0;
}
.tab-pane {
	display: none;
}
.tab-pane.active {
	display: block;
}
.setting-group {
	margin-bottom: 20px;
}
.setting-group label {
	display: block;
	margin-bottom: 8px;
	font-size: 13px;
	color: #ccc;
}
select,
input[type='range'] {
	width: 100%;
	padding: 8px;
	background: #222;
	color: #fff;
	border: 1px solid #555;
	border-radius: 4px;
	box-sizing: border-box;
}
.modal-footer {
	padding: 15px 20px;
	background: #2a2a2a;
	border-top: 1px solid #444;
	border-radius: 0 0 8px 8px;
	display: flex;
	gap: 10px;
	flex-shrink: 0;
}
.btn {
	flex: 1;
	padding: 10px;
	background: #007aff;
	border: none;
	border-radius: 4px;
	color: white;
	font-size: 14px;
	cursor: pointer;
}
.btn:active {
	background: #005bb5;
}
.btn-secondary {
	background: #555;
}
.btn-secondary:active {
	background: #444;
}

.sub-settings {
	border-left: 2px solid #555;
	padding-left: 15px;
	margin-top: 10px;
	transition: opacity 0.3s;
}