* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
	touch-action: none;
	-webkit-user-select: none;
	user-select: none;

	position: fixed;
	top: 0; left: 0; right: 0; bottom: 0;
	width: 100%;
	height: 100%;
	overflow: hidden;
	overscroll-behavior: none;
	-webkit-overflow-scrolling: auto;
}
body { background: #111; font-family: 'Montserrat', 'Helvetica Neue', Arial, sans-serif; }
canvas { display: block; width: 100vw; height: 100vh; }
#info {
	position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%);
	color: #666; font-family: 'Montserrat', sans-serif; font-weight: 400;
	font-size: 8px; letter-spacing: 1.8px;
	pointer-events: none;
	transition: opacity 0.4s ease;
	white-space: nowrap;
	text-align: center;
}
#info.hidden { opacity: 0; }
@media (max-width: 640px) {
	#info { font-size: 9px; letter-spacing: 1.1px; }
}

#audio-toggle {
	position: fixed; top: 20px; right: 20px;
	width: 40px; height: 40px;
	background: transparent;
	border: 1px solid rgba(255, 255, 255, 0.55);
	border-radius: 50%;
	cursor: pointer;
	z-index: 20000;
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 3px;
	padding: 0;
	transition: border-color 0.2s;
}
#audio-toggle:hover { border-color: #fff; }
#audio-toggle .bar {
	display: block;
	width: 2px;
	background: #fff;
	border-radius: 1px;
	height: 12px;
	transform-origin: center;
	transition: height 0.3s ease;
}

#audio-toggle.playing .bar { animation: audioBar 1s ease-in-out infinite; }
#audio-toggle.playing .bar:nth-child(1) { animation-delay: 0s; }
#audio-toggle.playing .bar:nth-child(2) { animation-delay: 0.2s; }
#audio-toggle.playing .bar:nth-child(3) { animation-delay: 0.4s; }
#audio-toggle.muted .bar { height: 4px; animation: none; }
@keyframes audioBar {
	0%, 100% { height: 4px; }
	50%      { height: 14px; }
}

#close-section-btn {
	position: fixed;
	bottom: 40px;
	left: 50%;
	transform: translateX(-50%);
	width: 40px; height: 40px;

	background: rgba(0, 0, 0, 0.4);
	backdrop-filter: blur(8px);
	-webkit-backdrop-filter: blur(8px);
	border: 1px solid rgba(255, 255, 255, 0.55);
	color: #fff;
	border-radius: 50%;
	cursor: pointer;
	z-index: 100;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 18px;
	line-height: 1;
	padding: 0;
	transition: border-color 0.2s, opacity 0.3s, visibility 0s linear 0.3s;
	opacity: 0;
	visibility: hidden;
	pointer-events: none;
}
#close-section-btn.active {
	opacity: 1;
	visibility: visible;
	pointer-events: auto;
	transition: border-color 0.2s, opacity 0.3s, visibility 0s linear 0s;
}
#close-section-btn:hover { border-color: #fff; }
#site-logo {
	position: fixed;
	top: 16px;
	left: 50%;
	transform: translateX(-50%);
	height: 55px;
	width: auto;
	z-index: 50;
	pointer-events: none;
	opacity: 0.5;
	transition: opacity 0.5s ease;
}
#site-logo.hidden { opacity: 0; }

#css3d-layer, #css3d-layer * { pointer-events: none; }

#preloader {
	position: fixed; inset: 0;
	background: #000;
	z-index: 99999;
	display: flex;
	align-items: center;
	justify-content: center;
	perspective: 400px;
	transition: opacity 0.6s ease, visibility 0s linear 0.6s;
}
#preloader.hidden {
	opacity: 0;
	visibility: hidden;
	pointer-events: none;
}
#preloader .cube {
	width: 40px;
	height: 40px;
	position: relative;
	transform-style: preserve-3d;
	animation: preloadCube 3s infinite linear;
}
#preloader .cube .face {
	position: absolute;
	width: 40px;
	height: 40px;
	background: transparent;
	border: 1px solid #7d090c;
}
#preloader .cube .face--front  { transform: translateZ(20px); }
#preloader .cube .face--back   { transform: rotateY(180deg) translateZ(20px); }
#preloader .cube .face--right  { transform: rotateY( 90deg) translateZ(20px); }
#preloader .cube .face--left   { transform: rotateY(-90deg) translateZ(20px); }
#preloader .cube .face--top    { transform: rotateX( 90deg) translateZ(20px); }
#preloader .cube .face--bottom { transform: rotateX(-90deg) translateZ(20px); }
@keyframes preloadCube {
	0%   { transform: rotateX(-20deg) rotateY(  0deg); }
	100% { transform: rotateX(-20deg) rotateY(360deg); }
}

#detail-overlay {
	position: fixed; inset: 0;

	z-index: 1000;
	opacity: 0;
	visibility: hidden;
	pointer-events: none;
	transition: opacity 0.5s ease, visibility 0s linear 0.5s;
}
#detail-overlay.visible {
	opacity: 1;
	visibility: visible;
	pointer-events: auto;
	transition: opacity 0.5s ease, visibility 0s linear 0s;
}