.verticality-work {
	--verticality-depth: 0;
	--verticality-brightness: 1;
	--verticality-title-opacity: 1;
	--verticality-progress: 0%;
	--verticality-intro-opacity: 1;
	--verticality-rule: rgba(232, 242, 250, .34);
	background: #050608;
	color: #f1f6f9;
	font-family: Arial, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
}

.verticality-work *,
.verticality-work *::before,
.verticality-work *::after {
	box-sizing: border-box;
}

.verticality-track {
	position: relative;
	height: var(--verticality-scroll-height, 5000svh);
	background: #000;
}

.verticality-sticky {
	position: sticky;
	top: 0;
	display: grid;
	width: 100%;
	height: 100svh;
	overflow: hidden;
	isolation: isolate;
}

.verticality-field {
	position: absolute;
	z-index: -2;
	inset: 0;
	overflow: hidden;
	background-color: var(--verticality-color-start, #16528b);
	filter: brightness(var(--verticality-brightness));
	transform: translateZ(0);
}

.verticality-field::before,
.verticality-field::after {
	position: absolute;
	inset: 0;
	content: "";
	pointer-events: none;
}

.verticality-field::before {
	z-index: 1;
	opacity: calc(.42 - (var(--verticality-depth) * .34));
	background:
		radial-gradient(circle at 18% 20%, rgba(128, 201, 242, .48), transparent 34%),
		radial-gradient(circle at 76% 72%, rgba(6, 33, 69, .75), transparent 48%),
		linear-gradient(180deg, rgba(10, 51, 97, .1), rgba(0, 4, 10, .76));
	transform: scale(calc(1 + (var(--verticality-depth) * .12)));
	transform-origin: 50% 35%;
}

.verticality-field::after {
	z-index: 4;
	opacity: calc(.12 + (var(--verticality-depth) * .12));
	background-image: repeating-linear-gradient(0deg, rgba(255,255,255,.022) 0 1px, transparent 1px 4px);
	mix-blend-mode: soft-light;
}

.verticality-intro-gradient {
	position: absolute;
	z-index: 2;
	inset: 0;
	background:
		radial-gradient(circle at 14% 18%, rgba(43, 174, 103, .96) 0 10%, rgba(43, 174, 103, .7) 27%, transparent 51%),
		radial-gradient(circle at 82% 20%, rgba(244, 213, 73, .95) 0 9%, rgba(244, 213, 73, .72) 29%, transparent 55%),
		radial-gradient(circle at 55% 82%, rgba(94, 198, 239, .98) 0 13%, rgba(94, 198, 239, .68) 34%, transparent 61%),
		linear-gradient(135deg, #319a68 0%, #d8cb59 48%, #64c4eb 100%);
	opacity: var(--verticality-intro-opacity);
	pointer-events: none;
	will-change: opacity;
}

.verticality-field span {
	position: absolute;
	z-index: 3;
	width: min(54vw, 42rem);
	aspect-ratio: 1;
	border: 1px solid rgba(218, 240, 255, .12);
	border-radius: 50%;
	opacity: calc(.32 - (var(--verticality-depth) * .25));
	filter: blur(calc(1px + (var(--verticality-depth) * 18px)));
	transform: translate3d(0, calc(var(--verticality-depth) * 12vh), 0) scale(calc(1 + (var(--verticality-depth) * .7)));
}

.verticality-field span:nth-child(1) { top: -24%; left: -9%; }
.verticality-field span:nth-child(2) { right: -18%; bottom: -22%; width: min(72vw, 58rem); }
.verticality-field span:nth-child(3) { top: 22%; left: 42%; width: min(26vw, 22rem); }

.verticality-nav {
	position: absolute;
	z-index: 5;
	top: 0;
	left: 0;
	display: flex;
	width: 100%;
	min-height: 4rem;
	align-items: center;
	gap: 1.25rem;
	border-bottom: 1px solid var(--verticality-rule);
	padding: 0 clamp(1rem, 2.8vw, 3rem);
}

.verticality-nav a {
	color: inherit;
	font-size: .64rem;
	font-weight: 700;
	letter-spacing: .1em;
	text-decoration: none;
}

.verticality-nav a:first-child { margin-right: auto; }

.verticality-nav a:focus-visible,
.verticality-reset:focus-visible,
.verticality-audio-toggle:focus-visible,
.verticality-controls input:focus-visible,
.verticality-controls label:has(input:focus-visible) {
	outline: 2px solid #fff;
	outline-offset: 4px;
}

.verticality-title {
	position: absolute;
	z-index: 2;
	top: clamp(6.2rem, 12vh, 9rem);
	left: clamp(1rem, 2.8vw, 3rem);
	width: min(64rem, calc(100% - 2rem));
	opacity: var(--verticality-title-opacity);
	pointer-events: none;
}

.verticality-title > p:first-child,
.verticality-title > p:last-child {
	font-size: clamp(.62rem, .85vw, .78rem);
	font-weight: 700;
	letter-spacing: .1em;
	line-height: 1.45;
	text-transform: uppercase;
}

.verticality-title h1 {
	max-width: 13ch;
	margin: .65rem 0 .8rem;
	font-size: clamp(3.1rem, 9vw, 10rem);
	font-weight: 400;
	letter-spacing: -.08em;
	line-height: .82;
	overflow-wrap: anywhere;
}

.verticality-state {
	position: absolute;
	z-index: 3;
	left: clamp(1rem, 2.8vw, 3rem);
	bottom: clamp(1rem, 2.8vw, 3rem);
	display: grid;
	grid-template-columns: auto auto;
	width: min(25rem, calc(100% - 2rem));
	align-items: center;
	gap: .55rem 1rem;
	font-size: .62rem;
	font-weight: 700;
	letter-spacing: .1em;
}

.verticality-state > span:nth-child(2) { justify-self: end; font-variant-numeric: tabular-nums; }

.verticality-state progress {
	grid-column: 1 / -1;
	width: 100%;
	height: 2px;
	border: 0;
	appearance: none;
	background: rgba(255,255,255,.24);
}

.verticality-state progress::-webkit-progress-bar { background: rgba(255,255,255,.24); }
.verticality-state progress::-webkit-progress-value { background: #f5f8fa; }
.verticality-state progress::-moz-progress-bar { background: #f5f8fa; }

.verticality-headphone {
	position: absolute;
	z-index: 3;
	top: 5.2rem;
	right: clamp(1rem, 2.8vw, 3rem);
	max-width: 25rem;
	margin: 0;
	font-size: .68rem;
	line-height: 1.45;
	text-align: right;
	transition: opacity .35s ease;
}

.verticality-headphone span { margin-right: .35rem; }
.verticality-work[data-audio-state="playing"] .verticality-headphone { opacity: .42; }

.verticality-controls {
	position: absolute;
	z-index: 4;
	right: clamp(1rem, 2.8vw, 3rem);
	bottom: clamp(1rem, 2.8vw, 3rem);
	display: grid;
	grid-template-columns: 7.5rem minmax(9rem, 16rem);
	width: min(27rem, calc(100% - 2rem));
	gap: .55rem .8rem;
	border: 1px solid var(--verticality-rule);
	padding: .9rem;
	background: rgba(0, 7, 15, .28);
	-webkit-backdrop-filter: blur(12px);
	backdrop-filter: blur(12px);
}

.verticality-audio-toggle {
	grid-column: 1 / -1;
	min-height: 2.25rem;
	border: 1px solid var(--verticality-rule);
	padding: .55rem .7rem;
	background: rgba(234, 245, 251, .92);
	color: #07111a;
	cursor: pointer;
	font: inherit;
	font-size: .64rem;
	font-weight: 700;
	letter-spacing: .08em;
}

.verticality-audio-toggle:hover { background: #fff; }
.verticality-audio-toggle:disabled { cursor: wait; opacity: .55; }

.verticality-controls > label:not(.verticality-resistance) {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: .65rem;
	font-size: .64rem;
	line-height: 1.3;
}

.verticality-controls output { font-variant-numeric: tabular-nums; }

.verticality-controls input[type="range"] {
	width: 100%;
	margin: 0;
	accent-color: #eaf5fb;
}

.verticality-resistance {
	grid-column: 1 / -1;
	display: flex;
	align-items: center;
	gap: .55rem;
	border-top: 1px solid var(--verticality-rule);
	padding-top: .7rem;
	font-size: .64rem;
	cursor: pointer;
}

.verticality-resistance input { margin: 0; accent-color: #eaf5fb; }

.verticality-reset {
	position: absolute;
	z-index: 5;
	top: 5rem;
	left: clamp(1rem, 2.8vw, 3rem);
	border: 1px solid var(--verticality-rule);
	padding: .58rem .72rem;
	background: rgba(0, 7, 15, .18);
	color: inherit;
	cursor: pointer;
	font: inherit;
	font-size: .6rem;
	font-weight: 700;
	letter-spacing: .09em;
}

.verticality-reset[hidden] { display: none; }

.verticality-record {
	--micro-bg: #050608;
	--micro-fg: #f1f6f9;
	--micro-surface: #101820;
	--micro-muted: #9dabb5;
	--micro-rule: rgba(232, 242, 250, .24);
	position: relative;
	z-index: 2;
	background: var(--micro-bg);
	color: var(--micro-fg);
}

.verticality-record > .micro-metadata { padding-top: clamp(4rem, 9vw, 8rem); }

.verticality-credits { padding: clamp(5rem, 10vw, 9rem) 0; }
.verticality-credits > p:last-child { margin-top: 1rem; color: var(--micro-muted); }
.verticality-credits ul { margin: 0; padding: 0; list-style: none; }
.verticality-credits li {
	display: grid;
	grid-template-columns: minmax(5rem, .5fr) minmax(10rem, 1.5fr) minmax(12rem, 1fr);
	gap: 1rem;
	border-bottom: 1px solid var(--micro-rule);
	padding: 1rem 0;
}

.verticality-credits li > span,
.verticality-credits small,
.verticality-credits li > div:last-child { color: var(--micro-muted); font-size: .68rem; }
.verticality-credits li > div { display: flex; flex-direction: column; gap: .3rem; }
.verticality-credits strong { font-size: .9rem; font-weight: 400; }
.verticality-credits a { color: inherit; text-underline-offset: .22em; }

.verticality-work > .micro-footer {
	background: #050608;
	color: #f1f6f9;
}

@media (max-width: 760px) {
	.verticality-nav { min-height: 3.5rem; }
	.verticality-title { top: 7.2rem; }
	.verticality-title h1 { font-size: clamp(3rem, 16vw, 6.5rem); }
	.verticality-headphone { top: auto; right: 1rem; bottom: 15.5rem; max-width: calc(100% - 2rem); font-size: .62rem; }
	.verticality-controls {
		right: 1rem;
		bottom: 1rem;
		grid-template-columns: 6.5rem minmax(0, 1fr);
		width: calc(100% - 2rem);
	}
	.verticality-state { bottom: 12.4rem; width: calc(100% - 2rem); }
	.verticality-reset { top: 4.35rem; }
	.verticality-credits li { grid-template-columns: 4.5rem 1fr; }
	.verticality-credits li > div:last-child { grid-column: 2; }
}

@media (max-height: 620px) and (orientation: landscape) {
	.verticality-title h1 { font-size: clamp(2.8rem, 8vw, 5.5rem); }
	.verticality-headphone { display: none; }
	.verticality-state { bottom: 1rem; }
	.verticality-controls { grid-template-columns: 6rem minmax(8rem, 12rem); }
}

@media (prefers-reduced-motion: reduce) {
	.verticality-field,
	.verticality-field::before,
	.verticality-intro-gradient,
	.verticality-field span,
	.verticality-headphone { transition: none !important; }
	.verticality-field span { transform: none; }
}