@charset "UTF-8";

:root {
	color-scheme: dark;
	font-size: 18px;
	--bg: #05060a;
	--panel: rgba(12, 15, 28, 0.92);
	--surface: rgba(15, 19, 36, 0.78);
	--surface-strong: rgba(22, 26, 44, 0.88);
	--primary: #8b5bff;
	--accent: #4ff3c6;
	--text-main: #f6f7ff;
	--text-muted: #98a3c4;
	--border: rgba(139, 91, 255, 0.26);
	--shadow: 0 28px 64px rgba(4, 6, 14, 0.55);
	scroll-behavior: smooth;
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	min-height: 100vh;
	font-family: "Pretendard", "Manrope", "SUIT", "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	color: var(--text-main);
	background:
		radial-gradient(circle at 15% 18%, rgba(79, 243, 198, 0.12), transparent 55%),
		radial-gradient(circle at 82% 75%, rgba(139, 91, 255, 0.18), transparent 52%),
		var(--bg);
	padding: clamp(1.5rem, 4vw, 4rem) clamp(1.25rem, 4vw, 3rem);
}

h1,
h2,
h3,
h4 {
	font-family: "Manrope", "Pretendard", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	margin: 0;
}

p {
	margin: 0;
}

a {
	color: inherit;
	text-decoration: none;
}

.sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

.page {
	width: min(1100px, 100%);
	margin: 0 auto;
	background:
		linear-gradient(155deg, rgba(139, 91, 255, 0.14), rgba(79, 243, 198, 0.08)),
		var(--panel);
	border-radius: 32px;
	border: 1px solid rgba(139, 91, 255, 0.22);
	box-shadow: var(--shadow);
	overflow: hidden;
	position: relative;
}

.page::before {
	content: "";
	position: absolute;
	inset: 0;
	background: radial-gradient(circle at 25% -10%, rgba(139, 91, 255, 0.22), transparent 60%);
	opacity: 0.7;
	pointer-events: none;
}

.page__header {
	position: relative;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1.5rem;
	padding: 1.6rem 2.4rem;
	background: rgba(8, 11, 22, 0.92);
	backdrop-filter: blur(16px);
	border-bottom: 1px solid rgba(139, 91, 255, 0.28);
	z-index: 1;
}

.page__header-left {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 1rem;
}

.page__brand {
	display: inline-flex;
	align-items: center;
	gap: 0.85rem;
	padding: 0.35rem 0.65rem;
	border-radius: 999px;
	background: linear-gradient(135deg, rgba(79, 243, 198, 0.18), rgba(139, 91, 255, 0.2));
	box-shadow: 0 18px 32px rgba(5, 6, 14, 0.45);
	transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.page__brand:hover,
.page__brand:focus-visible {
	transform: translateY(-1px);
	box-shadow: 0 24px 40px rgba(5, 6, 14, 0.58);
	filter: brightness(1.05);
}

.page__brand-logo {
	height: 30px;
	width: auto;
	filter: drop-shadow(0 4px 12px rgba(5, 6, 12, 0.5));
}

.page__brand-label {
	font-size: 0.95rem;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: rgba(246, 247, 255, 0.72);
}

.page__topic-nav {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.6rem;
	position: relative;
	z-index: 2;
}


.page__topic-nav a,
.page__topic-nav-group a {
	font-size: 0.85rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	padding: 0.35rem 0.8rem;
	border-radius: 999px;
	background: rgba(79, 243, 198, 0.12);
	color: rgba(243, 244, 255, 0.78);
	border: 1px solid rgba(79, 243, 198, 0.18);
	transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page__topic-nav a:hover,
.page__topic-nav a:focus-visible {
	background: rgba(139, 91, 255, 0.22);
	color: #ffffff;
	border-color: rgba(139, 91, 255, 0.4);
}

.page__topic-nav a.is-current,
.page__topic-nav-group a.is-current {
	background: linear-gradient(135deg, rgba(79, 243, 198, 0.38), rgba(139, 91, 255, 0.4));
	color: #ffffff;
	border-color: rgba(79, 243, 198, 0.6);
	box-shadow: 0 0 0 2px rgba(79, 243, 198, 0.35), 0 12px 24px rgba(10, 18, 32, 0.45);
	transform: translateY(-1px);
}

.page__topic-nav-group {
	display: flex;
	flex-direction: column;
	gap: 0.35rem;
	padding: 0.45rem 0.6rem 0.55rem;
	border-radius: 16px;
	background: rgba(10, 15, 28, 0.88);
	border: 1px solid rgba(139, 91, 255, 0.28);
	box-shadow: inset 0 0 0 1px rgba(79, 243, 198, 0.08);
}

.page__topic-nav-label {
	font-size: 0.7rem;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: rgba(152, 163, 196, 0.82);
	padding-left: 0.2rem;
}

.page__topic-nav-group a {
	width: 100%;
	font-size: 0.78rem;
	letter-spacing: 0.06em;
	padding: 0.35rem 0.65rem;
}

.page__topic-nav-group a[data-topic-role="parent"] {
	font-weight: 600;
	font-size: 0.82rem;
	background: rgba(79, 243, 198, 0.18);
	border-color: rgba(79, 243, 198, 0.32);
}

.page__topic-nav-group a[data-topic-role="child"] {
	background: rgba(42, 50, 82, 0.72);
	border-color: rgba(139, 91, 255, 0.26);
}

.page__topic-nav-group a[data-topic-role="parent"].is-current {
	background: linear-gradient(135deg, rgba(79, 243, 198, 0.42), rgba(139, 91, 255, 0.48));
	border-color: rgba(79, 243, 198, 0.64);
}

.page__topic-nav-group a[data-topic-role="child"].is-current {
	background: linear-gradient(135deg, rgba(90, 108, 178, 0.78), rgba(139, 91, 255, 0.54));
	border-color: rgba(139, 91, 255, 0.58);
}

@media (max-width: 768px) {
	.page__header {
		flex-direction: column;
		align-items: stretch;
	}

	.page__header-left {
		flex-direction: column;
		align-items: stretch;
		gap: 1rem;
	}

	.page__topic-nav {
		display: flex;
		flex-direction: column;
		align-items: stretch;
		gap: 0.7rem;
	}

	.page__topic-nav > * {
		width: 100%;
	}

	.page__topic-nav > a,
	.page__topic-nav-group a {
		display: block;
		text-align: center;
	}

	.page__topic-nav-group {
		padding: 0.55rem 0.75rem 0.65rem;
	}

	.page__nav {
		width: 100%;
		flex-direction: column;
		align-items: stretch;
		gap: 0.7rem;
	}

	.page__nav a {
		width: 100%;
		display: block;
		text-align: center;
	}

	.language-switch {
		width: 100%;
		order: -1;
	}

	.language-switch select {
		width: 100%;
		text-align-last: center;
	}
}

.page__nav {
	display: flex;
	gap: 1.1rem;
	align-items: center;
}

.page__nav a {
	font-size: 0.95rem;
	letter-spacing: 0.01em;
	color: rgba(235, 237, 255, 0.78);
	padding: 0.45rem 0.75rem;
	border-radius: 999px;
	transition: background 0.2s ease, color 0.2s ease;
}

.language-switch {
	position: relative;
	display: inline-flex;
	align-items: center;
}

.language-switch select {
	appearance: none;
	background: rgba(17, 22, 40, 0.88);
	color: rgba(245, 247, 255, 0.96);
	border: 1px solid rgba(79, 243, 198, 0.25);
	border-radius: 999px;
	font-size: 0.9rem;
	letter-spacing: 0.02em;
	padding: 0.45rem 2.2rem 0.45rem 0.85rem;
	cursor: pointer;
	transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.language-switch select option {
	background-color: #f4f6ff;
	color: #0d1326;
}

.language-switch select option:checked,
.language-switch select option:hover {
	background-color: rgba(139, 91, 255, 0.9);
	color: #ffffff;
}

.language-switch select:focus-visible,
.language-switch select:hover {
	border-color: rgba(139, 91, 255, 0.5);
	background: rgba(139, 91, 255, 0.18);
	color: #ffffff;
	outline: none;
}

.language-switch::after {
	content: "";
	position: absolute;
	width: 0.45rem;
	height: 0.45rem;
	border-right: 2px solid rgba(235, 237, 255, 0.7);
	border-bottom: 2px solid rgba(235, 237, 255, 0.7);
	transform: rotate(45deg);
	right: 1rem;
	pointer-events: none;
}

.page__nav a.is-active {
	background: rgba(79, 243, 198, 0.18);
	color: #ffffff;
}

.page__nav a:hover,
.page__nav a:focus-visible {
	background: rgba(139, 91, 255, 0.22);
	color: #ffffff;
}

.page__main {
	position: relative;
	z-index: 1;
}

.page__main > section {
	padding: clamp(2.8rem, 6vw, 4rem) clamp(2.8rem, 6vw, 4.5rem);
}

.page__main > section + section {
	border-top: 1px solid rgba(139, 91, 255, 0.18);
}

.home-hero {
	display: grid;
	grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
	gap: clamp(2rem, 6vw, 3.5rem);
	padding: clamp(3rem, 6vw, 4rem) clamp(3rem, 7vw, 5rem);
	background:
		radial-gradient(circle at 12% 18%, rgba(79, 243, 198, 0.16), transparent 55%),
		radial-gradient(circle at 88% 20%, rgba(139, 91, 255, 0.25), transparent 55%),
		rgba(8, 11, 22, 0.92);
	border-radius: 24px;
	box-shadow: var(--shadow);
	position: relative;
}

.home-hero__content {
	max-width: 640px;
	display: flex;
	flex-direction: column;
	gap: 1.25rem;
}

.home-hero__title {
	font-size: clamp(2.1rem, 6vw, 3.15rem);
	line-height: 1.22;
}

.home-hero__lede {
	color: rgba(226, 229, 250, 0.86);
	line-height: 1.6;
}

.home-hero__actions {
	display: flex;
	flex-wrap: wrap;
	gap: 0.85rem;
	margin-top: 0.5rem;
}

.home-cta {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.4rem;
	padding: 0.7rem 1.45rem;
	border-radius: 999px;
	background: linear-gradient(135deg, rgba(79, 243, 198, 0.28), rgba(139, 91, 255, 0.38));
	color: #0a0d1a;
	font-weight: 600;
	transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.home-cta:hover,
.home-cta:focus-visible {
	transform: translateY(-1px);
	box-shadow: 0 18px 32px rgba(8, 13, 28, 0.36);
}

.home-cta--ghost {
	background: rgba(11, 14, 24, 0.55);
	color: rgba(226, 229, 250, 0.92);
	border: 1px solid rgba(139, 91, 255, 0.4);
	box-shadow: none;
}

.home-cta--ghost:hover,
.home-cta--ghost:focus-visible {
	background: rgba(139, 91, 255, 0.24);
	color: #ffffff;
	box-shadow: 0 16px 28px rgba(10, 13, 25, 0.3);
}

.home-hero__highlights {
	margin: 0;
	padding: 0;
	list-style: none;
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 1.5rem;
	align-content: start;
}

.home-hero__highlights li {
	padding: 1.4rem;
	border-radius: 20px;
	background: rgba(13, 17, 30, 0.8);
	border: 1px solid rgba(139, 91, 255, 0.2);
	display: flex;
	flex-direction: column;
	gap: 0.5rem;
	color: rgba(218, 223, 247, 0.82);
}

.home-hero__highlights strong {
	font-size: 0.9rem;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: rgba(255, 255, 255, 0.82);
}

.home-topics {
	padding: clamp(2.8rem, 6vw, 4rem) clamp(2.6rem, 6vw, 4.5rem);
	background: rgba(8, 11, 22, 0.78);
	border-radius: 24px;
	box-shadow: inset 0 0 0 1px rgba(139, 91, 255, 0.16);
}

.home-topics__grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 1.6rem;
}

.topic-card {
	position: relative;
	padding: 1.9rem;
	display: flex;
	flex-direction: column;
	gap: 1rem;
	background: rgba(13, 16, 27, 0.92);
	border-radius: 20px;
	border: 1px solid rgba(139, 91, 255, 0.18);
	box-shadow: 0 24px 40px rgba(6, 8, 16, 0.35);
	min-height: 22rem;
}

.topic-card__title {
	font-size: 1.35rem;
	line-height: 1.3;
}

.topic-card__summary {
	color: rgba(218, 223, 247, 0.84);
	line-height: 1.58;
}

.topic-card__meta {
	margin: 0;
	padding: 0;
	list-style: none;
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
	color: rgba(152, 163, 196, 0.96);
	font-size: 0.85rem;
}

.topic-card__meta li {
	padding: 0.28rem 0.65rem;
	border-radius: 999px;
	background: rgba(33, 38, 62, 0.76);
	border: 1px solid rgba(139, 91, 255, 0.24);
}

.topic-card__link {
	margin-top: auto;
	align-self: flex-start;
	display: inline-flex;
	align-items: center;
	gap: 0.4rem;
	padding: 0.55rem 1.2rem;
	border-radius: 999px;
	background: rgba(79, 243, 198, 0.2);
	color: #ffffff;
	font-weight: 600;
	transition: background 0.2s ease, transform 0.2s ease;
}

.topic-card__link:hover,
.topic-card__link:focus-visible {
	background: rgba(79, 243, 198, 0.36);
	transform: translateY(-1px);
}

.topic-card--soon {
	opacity: 0.88;
	border-style: dashed;
	border-color: rgba(139, 91, 255, 0.4);
}

.topic-card__badge {
	position: absolute;
	top: 1.6rem;
	right: 1.6rem;
	padding: 0.25rem 0.75rem;
	border-radius: 999px;
	background: rgba(139, 91, 255, 0.24);
	font-size: 0.72rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: rgba(235, 237, 255, 0.82);
}

.home-roadmap {
	padding: clamp(2.6rem, 6vw, 3.8rem) clamp(2.6rem, 6vw, 4.2rem);
	background: rgba(11, 14, 25, 0.86);
	border-radius: 24px;
	box-shadow: inset 0 0 0 1px rgba(79, 243, 198, 0.16);
}

.roadmap-list {
	margin: 2rem 0 0;
	padding: 0;
	list-style: none;
	counter-reset: roadmap;
	display: grid;
	gap: 1.25rem;
}

.roadmap-list li {
	position: relative;
	padding: 1.4rem 1.4rem 1.4rem 3.4rem;
	border-radius: 18px;
	background: rgba(17, 20, 32, 0.92);
	border: 1px solid rgba(79, 243, 198, 0.18);
	color: rgba(214, 221, 245, 0.86);
}

.roadmap-list li::before {
	content: counter(roadmap, decimal-leading-zero);
	counter-increment: roadmap;
	position: absolute;
	left: 1.2rem;
	top: 50%;
	transform: translateY(-50%);
	font-family: "Space Grotesk", "Manrope", "Pretendard", sans-serif;
	font-weight: 700;
	font-size: 0.85rem;
	letter-spacing: 0.08em;
	color: rgba(79, 243, 198, 0.85);
}

.roadmap-list strong {
	display: block;
	font-size: 1rem;
	margin-bottom: 0.55rem;
	color: rgba(255, 255, 255, 0.9);
}

.home-about {
	display: grid;
	grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
	gap: clamp(1.8rem, 5vw, 3.2rem);
	padding: clamp(2.8rem, 6vw, 4rem) clamp(2.6rem, 6vw, 4rem);
	background: rgba(8, 11, 22, 0.82);
	border-radius: 24px;
	box-shadow: inset 0 0 0 1px rgba(139, 91, 255, 0.12);
}

.home-about__content {
	display: flex;
	flex-direction: column;
	gap: 1.1rem;
	color: rgba(222, 227, 250, 0.86);
	line-height: 1.62;
}

.home-about__notes {
	background: rgba(15, 19, 33, 0.92);
	border-radius: 20px;
	border: 1px solid rgba(79, 243, 198, 0.18);
	padding: 1.6rem 1.8rem;
}

.home-about__notes ul {
	margin: 0;
	padding: 0;
	list-style: none;
	display: flex;
	flex-direction: column;
	gap: 1rem;
}

.home-about__notes li {
	display: grid;
	grid-template-columns: minmax(0, 0.35fr) minmax(0, 1fr);
	gap: 0.75rem;
	font-size: 0.92rem;
	color: rgba(210, 218, 244, 0.86);
}

.home-about__notes strong {
	font-size: 0.8rem;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: rgba(79, 243, 198, 0.85);
}

.hero {
	background:
		radial-gradient(circle at 30% 20%, rgba(79, 243, 198, 0.18), transparent 55%),
		radial-gradient(circle at 70% 20%, rgba(139, 91, 255, 0.22), transparent 60%),
		transparent;
	display: grid;
	gap: 2rem;
}

.hero__eyebrow {
	font-size: 0.9rem;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: rgba(79, 243, 198, 0.8);
}

.hero__title {
	font-size: clamp(2.1rem, 4vw, 3.1rem);
	line-height: 1.2;
	font-weight: 700;
}

.hero__lede {
	font-size: clamp(1.05rem, 2vw, 1.2rem);
	line-height: 1.7;
	color: rgba(243, 244, 255, 0.82);
	max-width: 46ch;
}

.hero__meta {
	display: flex;
	flex-wrap: wrap;
	gap: 0.6rem;
}

.hero__tag {
	display: inline-flex;
	align-items: center;
	gap: 0.4rem;
	padding: 0.45rem 0.85rem;
	border-radius: 999px;
	font-size: 0.85rem;
	letter-spacing: 0.03em;
	background: rgba(22, 26, 44, 0.65);
	border: 1px solid rgba(139, 91, 255, 0.28);
	color: rgba(235, 237, 255, 0.85);
	transition: background 0.2s ease, color 0.2s ease;
}

.hero__tag--link:hover,
.hero__tag--link:focus-visible {
	background: rgba(79, 243, 198, 0.2);
	color: #ffffff;
}

.story-intro {
	display: grid;
	grid-template-columns: minmax(0, 2.2fr) minmax(0, 1.2fr);
	gap: clamp(2rem, 5vw, 3rem);
}

.story-intro__content {
	display: grid;
	gap: 1.6rem;
	font-size: 1.05rem;
	line-height: 1.75;
}

.story-intro__content h2 {
	font-size: 1.45rem;
	font-weight: 700;
	color: #ffffff;
}

.story-intro__note {
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: 22px;
	padding: 1.8rem;
	box-shadow: 0 18px 36px rgba(5, 6, 14, 0.45);
	display: grid;
	gap: 1.2rem;
}

.story-intro__note-title {
	font-size: 1.05rem;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: rgba(79, 243, 198, 0.85);
}

.fact-list {
	margin: 0;
	display: grid;
	gap: 1rem;
}

.fact-list__item {
	background: rgba(18, 22, 38, 0.85);
	border-radius: 16px;
	padding: 1rem 1.2rem;
	border: 1px solid rgba(139, 91, 255, 0.18);
	display: grid;
	gap: 0.35rem;
}

.fact-list__item dt {
	font-size: 0.82rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: rgba(155, 164, 198, 0.72);
}

.fact-list__item dd {
	margin: 0;
	font-size: 0.95rem;
	color: rgba(243, 244, 255, 0.9);
}

.section__head {
	display: grid;
	gap: 0.75rem;
	margin-bottom: clamp(2rem, 3.5vw, 3rem);
}

.section__head h2 {
	font-size: 1.65rem;
	font-weight: 700;
}

.section__head p {
	font-size: 1rem;
	line-height: 1.7;
	color: rgba(223, 226, 247, 0.78);
}


.is-visually-hidden {
	position: absolute !important;
	width: 1px;
	height: 1px;
	margin: -1px;
	padding: 0;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	clip-path: inset(50%);
	white-space: nowrap;
	border: 0;
}

.timeline-hero {
	background:
		radial-gradient(circle at 22% 18%, rgba(79, 243, 198, 0.18), transparent 55%),
		radial-gradient(circle at 78% 12%, rgba(139, 91, 255, 0.22), transparent 60%),
		transparent;
	display: grid;
	gap: clamp(2rem, 4vw, 2.8rem);
}

.timeline-hero__head {
	display: grid;
	gap: 1.2rem;
	max-width: 680px;
}

.timeline-hero__title {
	font-size: clamp(2.2rem, 4vw, 3.25rem);
	line-height: 1.18;
	font-weight: 700;
}

.timeline-hero__lede {
	font-size: clamp(1rem, 2vw, 1.18rem);
	line-height: 1.8;
	color: rgba(232, 234, 252, 0.86);
	max-width: 60ch;
}


.timeline-grid {
	display: grid;
	gap: clamp(1.4rem, 3vw, 1.8rem);
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.timeline-archive {
	margin-top: clamp(3rem, 6vw, 4.5rem);
	background: rgba(12, 16, 30, 0.82);
	border: 1px solid rgba(79, 243, 198, 0.18);
	border-radius: 26px;
	padding: clamp(1.8rem, 3vw, 2.4rem);
	display: grid;
	gap: 1.4rem;
	box-shadow: 0 32px 48px rgba(4, 6, 16, 0.52);
}

.timeline-archive__title {
	margin: 0;
	font-size: clamp(1.5rem, 3vw, 1.9rem);
	font-weight: 700;
	color: rgba(236, 239, 255, 0.94);
}

.timeline-archive__intro {
	margin: 0;
	font-size: 1rem;
	line-height: 1.7;
	color: rgba(206, 214, 240, 0.78);
}

.timeline-archive__list {
	display: grid;
	gap: 1rem;
}

.timeline-archive__item {
	background: rgba(14, 18, 34, 0.86);
	border: 1px solid rgba(139, 91, 255, 0.22);
	border-radius: 20px;
	padding: 1.1rem 1.3rem;
	color: rgba(228, 232, 252, 0.9);
	transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.timeline-archive__item[open] {
	border-color: rgba(79, 243, 198, 0.42);
	box-shadow: 0 18px 30px rgba(4, 6, 16, 0.45);
}

.timeline-archive__summary {
	margin: 0;
	font-size: 1.02rem;
	font-weight: 600;
	cursor: pointer;
	list-style: none;
}

.timeline-archive__summary::-webkit-details-marker {
	display: none;
}

.timeline-archive__summary::before {
	content: '+';
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 1.35rem;
	height: 1.35rem;
	margin-right: 0.55rem;
	border-radius: 8px;
	background: rgba(139, 91, 255, 0.28);
	color: #fff;
	font-size: 0.9rem;
	transition: transform 0.2s ease;
}


.timeline-archive__item[open] .timeline-archive__summary::before {
	content: '-';
	background: rgba(79, 243, 198, 0.35);
}

.timeline-archive__body {
	margin-top: 0.95rem;
	display: grid;
	gap: 1.1rem;
}

.timeline-archive__body .event-detail {
	background: rgba(10, 14, 28, 0.9);
	border-radius: 18px;
	padding: 1.2rem 1.4rem;
	border: 1px solid rgba(139, 91, 255, 0.2);
}

.timeline-archive__body .event-detail__summary {
	color: rgba(205, 212, 237, 0.82);
}

.timeline-archive__body .event-detail__body {
	display: grid;
	gap: 1rem;
}

.timeline-group {
	display: grid;
	gap: 1rem;
	background: rgba(14, 18, 32, 0.82);
	border: 1px solid rgba(139, 91, 255, 0.24);
	border-radius: 24px;
	padding: 1.6rem 1.5rem;
	box-shadow: 0 22px 44px rgba(5, 8, 18, 0.48);
}

.timeline-group__head {
	display: grid;
	gap: 0.5rem;
}

.timeline-group__decade {
	margin: 0;
	font-size: 0.82rem;
	letter-spacing: 0.18em;
	text-transform: uppercase;
	color: rgba(79, 243, 198, 0.78);
}

.timeline-group__topic {
	font-size: 1.05rem;
	font-weight: 600;
	color: rgba(233, 236, 255, 0.88);
}

.timeline-group__summary {
	margin: 0;
	font-size: 0.93rem;
	line-height: 1.6;
	color: rgba(206, 212, 238, 0.78);
}

.timeline-group__list {
	display: grid;
	gap: 0.75rem;
}

.timeline-event {
	position: relative;
	background: rgba(15, 20, 36, 0.78);
	border: 1px solid rgba(139, 91, 255, 0.22);
	border-radius: 22px;
	padding: 1.4rem 1.6rem;
	display: grid;
	justify-items: flex-start;
	gap: 0.55rem;
	width: 100%;
	color: rgba(230, 232, 248, 0.88);
	font-family: inherit;
	text-align: left;
	cursor: pointer;
	transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
	box-shadow: 0 18px 32px rgba(5, 6, 14, 0.4);
}

.timeline-event:focus-visible,
.timeline-event:hover {
	border-color: rgba(79, 243, 198, 0.48);
	box-shadow: 0 26px 42px rgba(4, 8, 18, 0.55);
	transform: translateY(-2px);
}

.timeline-event__year {
	font-size: 1.55rem;
	font-weight: 700;
	letter-spacing: 0.04em;
	color: #ffffff;
}

.timeline-event__label {
	font-size: 0.95rem;
	color: rgba(180, 190, 225, 0.88);
	line-height: 1.5;
}

.signals {
	display: grid;
	gap: clamp(2rem, 4vw, 3rem);
}

.signal-grid {
	display: grid;
	gap: clamp(1.4rem, 3vw, 1.8rem);
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.signal-card {
	background: rgba(17, 21, 36, 0.85);
	border: 1px solid rgba(139, 91, 255, 0.2);
	border-radius: 22px;
	padding: 1.6rem 1.9rem;
	display: grid;
	gap: 0.8rem;
	box-shadow: 0 24px 40px rgba(6, 8, 18, 0.48);
}

.signal-card h3 {
	font-size: 1.2rem;
	font-weight: 600;
}

.signal-card p {
	margin: 0;
	font-size: 0.98rem;
	line-height: 1.7;
	color: rgba(220, 224, 245, 0.82);
}

.sources {
	display: grid;
	gap: clamp(2rem, 4vw, 3rem);
}

.source-list {
	margin: 0;
	padding-left: 1.2rem;
	display: grid;
	gap: 0.8rem;
	font-size: 0.98rem;
	line-height: 1.65;
}

.source-list a {
	color: rgba(158, 208, 255, 0.92);
	text-decoration: none;
}

.source-list a:hover,
.source-list a:focus-visible {
	text-decoration: underline;
}

.modal {
	position: fixed;
	inset: 0;
	display: grid;
	align-items: center;
	justify-items: center;
	padding: 1.5rem;
	background: rgba(5, 6, 12, 0.45);
	z-index: 50;
}

.modal[hidden] {
	display: none;
}

.modal__overlay {
	position: absolute;
	inset: 0;
	background: rgba(5, 6, 12, 0.55);
}

.modal__window {
	position: relative;
	background: rgba(10, 12, 24, 0.96);
	border-radius: 28px;
	border: 1px solid rgba(139, 91, 255, 0.28);
	padding: clamp(2rem, 4vw, 2.4rem);
	max-width: min(720px, 100%);
	width: 100%;
	max-height: min(86vh, 820px);
	box-shadow: 0 36px 56px rgba(4, 6, 12, 0.65);
	outline: none;
	display: flex;
	flex-direction: column;
	overflow: hidden;
}

.modal__close {
	position: absolute;
	top: 1.1rem;
	right: 1.2rem;
	width: 40px;
	height: 40px;
	border-radius: 50%;
	border: 1px solid rgba(139, 91, 255, 0.35);
	background: rgba(16, 20, 34, 0.92);
	color: rgba(230, 232, 248, 0.9);
	font-size: 1.6rem;
	line-height: 1;
	cursor: pointer;
	transition: background 0.2s ease, transform 0.2s ease;
}

.modal__close:hover,
.modal__close:focus-visible {
	background: rgba(79, 243, 198, 0.18);
	transform: scale(1.05);
}

.modal__content {
	display: grid;
	gap: 1.6rem;
	overflow-y: auto;
	padding-right: 0.4rem;
}

.modal__content::-webkit-scrollbar {
	width: 0.6rem;
}

.modal__content::-webkit-scrollbar-track {
	background: rgba(10, 12, 24, 0.6);
	border-radius: 999px;
}

.modal__content::-webkit-scrollbar-thumb {
	background: rgba(79, 243, 198, 0.35);
	border-radius: 999px;
}

.event-detail {
	display: grid;
	gap: 1.4rem;
}

.event-detail__header {
	display: grid;
	gap: 0.6rem;
}

.event-detail__year {
	margin: 0;
	font-size: 0.85rem;
	letter-spacing: 0.18em;
	text-transform: uppercase;
	color: rgba(79, 243, 198, 0.8);
}

.event-detail__summary {
	margin: 0;
	font-size: 1rem;
	line-height: 1.65;
	color: rgba(220, 224, 245, 0.84);
}

.event-detail__story {
	display: grid;
	gap: 1rem;
	font-size: 0.98rem;
	line-height: 1.7;
	color: rgba(222, 228, 248, 0.85);
	padding: 1.2rem 1.1rem;
	border-radius: 20px;
	background: rgba(16, 20, 34, 0.72);
	border: 1px solid rgba(139, 91, 255, 0.18);
	box-shadow: 0 18px 34px rgba(5, 6, 14, 0.35);
}

.event-detail__story p {
	margin: 0;
}

/* notes: modal 하단 설명(공통) 가독성 개선 */
.event-detail__notes {
	display: grid;
	gap: 0.8rem;
	padding: 0.9rem 1rem;
 	border-radius: 14px;
 	background: linear-gradient(180deg, rgba(16,20,34,0.62), rgba(12,15,28,0.52));
 	border: 1px solid rgba(139, 91, 255, 0.10);
 	font-size: 0.98rem;
 	line-height: 1.66;
 	color: rgba(205, 212, 240, 0.95);
 	max-width: 64ch; /* 읽기용 최적 가로폭 */
}

.event-detail__notes p {
	margin: 0;
}

.event-detail__notes strong {
	color: var(--accent);
	font-weight: 700;
}

/* glossary abbr 스타일: 눈에 띄게 하고 포인터/터치 대응 */
.glossary-abbr {
	text-decoration: underline dotted rgba(255,255,255,0.16);
	cursor: help;
	color: var(--text-main);
	border-bottom: 1px dotted rgba(79,243,198,0.28);
	position: relative;
	white-space: nowrap;
}

/* 커스텀 툴팁 */
.glossary-tooltip {
	position: absolute;
	background: rgba(16,20,34,0.98);
	color: var(--text-main);
	padding: 0.6rem 0.9rem;
	border-radius: 10px;
	box-shadow: 0 10px 28px rgba(4,6,14,0.6);
	font-size: 0.9rem;
	line-height: 1.4;
	max-width: 26rem;
	z-index: 2000;
	pointer-events: auto; /* 모바일에서 터치로 닫기/복사 가능하도록 허용 */
	display: none;
	transition: opacity 0.18s ease;
}

@media (max-width: 520px) {
    .glossary-tooltip { pointer-events: auto; }
}

@media (max-width: 520px) {
    .event-detail__notes {
        max-width: none;
        font-size: 0.98rem;
    }
}

.event-detail__body ul {
	margin: 0;
	padding-left: 1.1rem;
	display: grid;
	gap: 0.65rem;
	font-size: 0.98rem;
	line-height: 1.6;
	color: rgba(205, 212, 240, 0.9);
}

body.is-modal-open {
	overflow: hidden;
}

body.is-modal-open .timeline-event {
	pointer-events: none;
	transition: none;
}

body.is-modal-open .timeline-event:hover,
body.is-modal-open .timeline-event:focus,
body.is-modal-open .timeline-event:focus-visible {
	border-color: rgba(139, 91, 255, 0.22);
	box-shadow: 0 18px 32px rgba(5, 6, 14, 0.4);
	transform: none;
	outline: none;
}

.insights {
	display: grid;
	gap: clamp(2.2rem, 5vw, 3rem);
}

.insight-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
	gap: 1.8rem;
}

.insight-card {
	background: rgba(18, 22, 40, 0.82);
	border-radius: 20px;
	border: 1px solid rgba(139, 91, 255, 0.2);
	padding: 1.6rem 1.8rem;
	display: grid;
	gap: 0.85rem;
	box-shadow: 0 20px 34px rgba(5, 6, 14, 0.45);
}

.insight-card h3 {
	font-size: 1.15rem;
	color: #ffffff;
}

.insight-card p,
.insight-card ul {
	font-size: 0.98rem;
	line-height: 1.7;
	color: rgba(216, 220, 242, 0.82);
}

.insight-card ul {
	margin: 0;
	padding-left: 1.1rem;
}

.story-outro {
	display: grid;
	grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
	gap: clamp(2rem, 5vw, 3rem);
}

.story-outro__body {
	display: grid;
	gap: 1.4rem;
	font-size: 1.05rem;
	line-height: 1.75;
}

.story-outro__body h2 {
	font-size: 1.5rem;
	font-weight: 700;
}

.story-outro__sources {
	background: rgba(16, 20, 36, 0.9);
	border-radius: 22px;
	border: 1px solid rgba(139, 91, 255, 0.22);
	padding: 1.8rem;
	display: grid;
	gap: 1rem;
	box-shadow: 0 20px 36px rgba(5, 6, 14, 0.45);
}

.story-outro__sources h3 {
	font-size: 1.05rem;
	letter-spacing: 0.05em;
	text-transform: uppercase;
	color: rgba(79, 243, 198, 0.8);
}

.story-outro__sources ul {
	margin: 0;
	padding-left: 1.1rem;
	display: grid;
	gap: 0.65rem;
}

.story-outro__sources a {
	color: rgba(220, 232, 255, 0.82);
	text-decoration: underline;
	text-decoration-color: rgba(79, 243, 198, 0.55);
}

.page__footer {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	gap: 1rem;
	padding: 1.6rem 2.4rem;
	background: rgba(8, 11, 22, 0.9);
	border-top: 1px solid rgba(139, 91, 255, 0.24);
	font-size: 0.85rem;
	color: rgba(198, 205, 232, 0.7);
	position: relative;
	z-index: 1;
}

.page__footer-link {
	color: rgba(79, 243, 198, 0.8);
	text-decoration: underline;
}

.scroll-top {
	position: fixed;
	right: clamp(1.1rem, 4vw, 2.6rem);
	bottom: clamp(1.4rem, 5vw, 3rem);
	width: 3.1rem;
	height: 3.1rem;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	border-radius: 999px;
	border: 1px solid rgba(79, 243, 198, 0.32);
	background: rgba(8, 11, 22, 0.92);
	color: var(--accent);
	font-size: 1.35rem;
	font-weight: 700;
	box-shadow: 0 22px 48px rgba(5, 6, 14, 0.45);
	backdrop-filter: blur(12px);
	cursor: pointer;
	transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, color 0.2s ease;
	z-index: 1200;
}

.scroll-top:is(:hover, :focus-visible) {
	transform: translateY(-2px);
	box-shadow: 0 28px 60px rgba(5, 6, 14, 0.58);
	border-color: rgba(139, 91, 255, 0.44);
	color: #ffffff;
}

.scroll-top:active {
	transform: translateY(0);
	box-shadow: 0 16px 32px rgba(5, 6, 14, 0.52);
}

body.is-modal-open .scroll-top {
	display: none !important;
}

.modal-scroll-top {
	position: absolute;
	right: clamp(0.9rem, 3vw, 1.4rem);
	bottom: clamp(0.9rem, 3vw, 1.4rem);
	width: 2.6rem;
	height: 2.6rem;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	border-radius: 999px;
	border: 1px solid rgba(139, 91, 255, 0.4);
	background: rgba(16, 20, 34, 0.92);
	color: rgba(230, 232, 248, 0.94);
	font-size: 1.2rem;
	font-weight: 700;
	box-shadow: 0 18px 36px rgba(4, 6, 12, 0.5);
	cursor: pointer;
	transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.modal-scroll-top:is(:hover, :focus-visible) {
	transform: translateY(-2px);
	box-shadow: 0 24px 44px rgba(4, 6, 12, 0.62);
	border-color: rgba(79, 243, 198, 0.5);
	color: #ffffff;
}

.modal-scroll-top:active {
	transform: translateY(0);
	box-shadow: 0 16px 28px rgba(4, 6, 12, 0.55);
}

@media (max-width: 960px) {
	.home-hero {
		grid-template-columns: 1fr;
	}

	.home-hero__highlights {
		grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
	}

	.home-topics__grid {
		grid-template-columns: 1fr;
	}

	.home-about {
		grid-template-columns: 1fr;
	}

	.home-about__notes li {
		grid-template-columns: minmax(0, 1fr);
	}

	.story-intro,
	.story-outro {
		grid-template-columns: 1fr;
	}

	.story-intro__note,
	.story-outro__sources {
		order: -1;
	}

	.timeline__item {
		padding-left: 5.4rem;
	}

	.timeline__year {
		width: 4.6rem;
		height: 4.6rem;
	}

	.timeline__list::before,
	.timeline__item::before {
		left: 2.1rem;
	}
}

@media (max-width: 720px) {
	body {
		padding: clamp(1rem, 6vw, 2rem);
	}

	.home-hero {
		gap: 1.8rem;
		padding: clamp(2.4rem, 7vw, 3.2rem);
	}

	.home-hero__actions {
		justify-content: flex-start;
	}

	.home-hero__highlights {
		grid-template-columns: 1fr;
	}

	.home-topics {
		padding: clamp(2.2rem, 7vw, 3.2rem);
	}

	.topic-card {
		padding: 1.6rem;
	}

	.home-roadmap {
		padding: clamp(2.2rem, 7vw, 3.2rem);
	}

	.roadmap-list li {
		padding: 1.2rem 1.2rem 1.2rem 3.1rem;
	}

	.home-about {
		gap: 1.6rem;
		padding: clamp(2.2rem, 7vw, 3rem);
	}

	.page__header {
		flex-direction: column;
		align-items: stretch;
		gap: 1rem;
		padding: 1.4rem 1.8rem;
	}

	.page__header-left {
		width: 100%;
		flex-direction: column;
		align-items: stretch;
		gap: 0.8rem;
	}

	.page__topic-nav {
		width: 100%;
		display: flex;
		flex-direction: column;
		align-items: stretch;
		gap: 0.75rem;
	}

	.page__topic-nav > * {
		width: 100%;
	}

	.page__topic-nav > a,
	.page__topic-nav-group a {
		display: block;
		text-align: center;
	}

	.page__topic-nav-group {
		width: 100%;
		padding: 0.6rem 0.85rem 0.75rem;
	}

	.page__nav {
		justify-content: center;
		flex-wrap: wrap;
	}

	.page__main > section {
		padding: clamp(2.2rem, 7vw, 3rem) clamp(1.8rem, 6vw, 3rem);
	}

	.hero__title {
		font-size: clamp(1.8rem, 7vw, 2.6rem);
	}

	.timeline__item {
		padding-left: 4.6rem;
	}

	.timeline__year {
		width: 4.1rem;
		height: 4.1rem;
		font-size: 1.05rem;
	}

	.timeline__list::before,
	.timeline__item::before {
		left: 1.8rem;
	}
}

@media (max-width: 520px) {
	.page {
		border-radius: 24px;
	}

	.home-cta,
	.home-cta--ghost {
		width: 100%;
		justify-content: center;
	}

	.topic-card__meta li {
		width: 100%;
		text-align: center;
	}

	.timeline__card,
	.story-intro__note,
	.insight-card,
	.story-outro__sources {
		padding: 1.4rem 1.5rem;
	}
}

/* 스토리 보드와 노트 보드 사이에만 추가 여백을 둬서 두 패널이 붙어보이지 않게 함 */
.event-detail__story + .event-detail__notes {
	margin-top: 1rem;
}