:root {
	--bg: #f4f6f8;
	--surface: #ffffff;
	--surface-strong: #ffffff;
	--text-main: #1f2d3d;
	--text-sub: #5a6778;
	--line: rgba(31, 45, 61, 0.16);
	--primary: #2f4763;
	--secondary: #8f9bad;
	--midnight: #1f2a38;
	--accent: #e28a4a;
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	color: var(--text-main);
	font-family: 'Inter', 'Noto Sans SC', sans-serif;
	background:
		radial-gradient(circle at 8% 10%, rgba(143, 155, 173, 0.2), transparent 30%),
		radial-gradient(circle at 90% 4%, rgba(47, 71, 99, 0.12), transparent 28%),
		linear-gradient(160deg, #fbfcfd 0%, var(--bg) 52%, #eef2f7 100%);
	min-height: 100vh;
}

.navbar {
	backdrop-filter: blur(8px);
	box-shadow: 0 8px 20px rgba(31, 45, 61, 0.16);
	background: linear-gradient(132deg, #22364d 0%, var(--primary) 56%, #3d5a79 100%) !important;
	border-bottom: 1px solid rgba(255, 255, 255, 0.25);
	padding: 0.86rem 0 0.78rem;
}

.navbar .container {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1.2rem;
}

.navbar-brand {
	letter-spacing: 0.01em;
	font-weight: 700;
	font-size: clamp(1.1rem, 2.2vw, 1.62rem);
	white-space: nowrap;
}

.navbar .nav-link {
	color: rgba(255, 255, 255, 0.92) !important;
	padding: 0.34rem 0.18rem 0.52rem !important;
	border-radius: 0;
	font-weight: 600;
	font-size: 0.96rem;
	line-height: 1;
	margin: 0 0.52rem;
	position: relative;
	transition: color 0.2s ease, transform 0.2s ease;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
	color: #ffffff !important;
	background: transparent;
	transform: translateY(-1px);
}

.navbar .navbar-nav {
	display: flex;
	align-items: center;
	gap: 0.25rem;
	padding: 0.08rem 0;
	background: transparent;
}

.navbar .nav-link.active {
	color: #ffffff !important;
	box-shadow: none;
}

.navbar .nav-link::after {
	content: '';
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	height: 2px;
	border-radius: 999px;
	background: transparent;
	transition: background-color 0.2s ease;
}

.navbar .nav-link:hover::after {
	background: rgba(255, 255, 255, 0.45);
}

.navbar .nav-link.active::after {
	background: var(--accent);
}

.homepage-main {
	width: min(1080px, calc(100% - 3.2rem));
	margin: 2.8rem auto 4.2rem;
	display: grid;
	gap: 1.6rem;
}

.balanced-layout {
	justify-items: center;
}

.content-block {
	background: var(--surface);
	border: 1px solid var(--line);
	border-radius: 20px;
	padding: 2rem 2.15rem;
	box-shadow: 0 14px 30px rgba(31, 45, 61, 0.08);
	position: relative;
	overflow: hidden;
	animation: rise-in 0.8s ease both;
	width: 100%;
}

.content-block::before {
	content: '';
	position: absolute;
	width: 220px;
	height: 220px;
	border-radius: 50%;
	right: -100px;
	top: -100px;
	background: radial-gradient(circle, rgba(143, 155, 173, 0.18), rgba(143, 155, 173, 0));
	pointer-events: none;
}

.content-block::after {
	content: '';
	position: absolute;
	inset: 0;
	background: linear-gradient(120deg, rgba(255, 255, 255, 0), rgba(47, 71, 99, 0.035) 62%, rgba(255, 255, 255, 0));
	pointer-events: none;
}

.section-notice {
	animation-delay: 0.12s;
}

.section-deadline {
	animation-delay: 0.24s;
}

.content-head {
	margin-bottom: 1rem;
	padding-bottom: 0.62rem;
	border-bottom: 1px solid rgba(143, 155, 173, 0.34);
}

h1,
h2,
h3 {
	margin: 0;
	color: var(--midnight);
}

h1 {
	font-size: clamp(1.35rem, 2vw, 1.7rem);
}

h2 {
	font-size: clamp(1.4rem, 2.2vw, 1.8rem);
}

h3 {
	font-size: 1.05rem;
}

p {
	color: var(--text-sub);
	line-height: 1.75;
	font-size: 1rem;
}

.section-note {
	margin-top: 0.35rem;
	font-size: 0.93rem;
	color: #677488;
}

.lead-text {
	font-size: 1.06rem;
	color: #364b63;
	margin-bottom: 0.7rem;
}

.intro-layout {
	display: grid;
	grid-template-columns: 1.5fr 1fr;
	gap: 1.25rem;
	align-items: start;
}

.intro-copy {
	max-width: 64ch;
}

.intro-copy p {
	margin-bottom: 0.62rem;
}

.home-links {
	margin-top: 0.85rem;
	display: flex;
	flex-wrap: wrap;
	gap: 0.55rem;
}

.home-link-item {
	display: inline-block;
	padding: 0.42rem 0.8rem;
	border-radius: 999px;
	border: 1px solid rgba(47, 71, 99, 0.32);
	background: rgba(255, 255, 255, 0.78);
	font-size: 0.9rem;
	font-weight: 600;
	color: #334d67;
	text-decoration: none;
	transition: all 0.2s ease;
}

.home-link-item:hover {
	color: #1f2a38;
	border-color: rgba(47, 71, 99, 0.52);
	background: rgba(255, 255, 255, 0.95);
	transform: translateY(-1px);
}

.primary-link-item {
	background: linear-gradient(140deg, #d9742b, #e28a4a);
	color: #ffffff;
	border-color: rgba(217, 116, 43, 0.88);
	box-shadow: 0 8px 16px rgba(217, 116, 43, 0.28);
}

.primary-link-item:hover {
	color: #ffffff;
	background: linear-gradient(140deg, #c7641f, #d87a39);
	border-color: rgba(199, 100, 31, 0.92);
	box-shadow: 0 10px 18px rgba(199, 100, 31, 0.34);
}

.intro-side {
	background: linear-gradient(135deg, rgba(47, 71, 99, 0.08), rgba(143, 155, 173, 0.08));
	border: 1px solid rgba(47, 71, 99, 0.2);
	border-radius: 16px;
	padding: 1rem 1rem 0.9rem;
}

.intro-side h3 {
	font-size: 1rem;
	margin-bottom: 0.65rem;
}

.intro-side ul {
	margin: 0;
	padding: 0;
	list-style: none;
	display: grid;
	gap: 0.45rem;
}

.intro-side li {
	font-size: 0.95rem;
	color: #445569;
	padding: 0.55rem 0.65rem;
	background: rgba(255, 255, 255, 0.66);
	border-radius: 10px;
}

.intro-side li span {
	font-weight: 700;
	color: var(--midnight);
	margin-right: 0.3rem;
}

.highlight-grid {
	margin-top: 1.2rem;
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 0.95rem;
}

.highlight-card {
	background: var(--surface-strong);
	border: 1px solid rgba(143, 155, 173, 0.35);
	border-radius: 14px;
	padding: 0.92rem 1rem;
	transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.highlight-card:hover {
	transform: translateY(-3px);
	box-shadow: 0 10px 16px rgba(31, 45, 61, 0.14);
}

.highlight-card h3 {
	color: #35506a;
}

.highlight-card p {
	margin-top: 0.45rem;
	font-size: 0.93rem;
}

.notice-list {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 0.95rem;
}

.notice-item {
	background: linear-gradient(130deg, #ffffff, rgba(244, 247, 251, 0.96));
	border-left: 4px solid var(--secondary);
	border-radius: 12px;
	padding: 0.95rem 0.95rem 0.95rem 1rem;
}

.notice-item h3 {
	color: #3d5166;
}

.notice-item p {
	margin: 0.48rem 0 0;
	font-size: 0.93rem;
}

.notice-rules {
	counter-reset: rule-count;
	gap: 1rem;
}

.notice-rule-item {
	position: relative;
	padding: 1.05rem 1rem 1rem 1.08rem;
	border-left: 0;
	border-top: 4px solid rgba(47, 71, 99, 0.62);
	background: linear-gradient(142deg, #ffffff 0%, rgba(242, 246, 251, 0.96) 100%);
	box-shadow: 0 8px 16px rgba(31, 45, 61, 0.08);
	transition: transform 0.2s ease, box-shadow 0.2s ease;
	counter-increment: rule-count;
}

.notice-rule-item::before {
	content: counter(rule-count);
	position: absolute;
	top: -11px;
	right: 12px;
	width: 26px;
	height: 26px;
	border-radius: 50%;
	display: grid;
	place-items: center;
	font-size: 0.78rem;
	font-weight: 800;
	color: #ffffff;
	background: linear-gradient(140deg, #304b68, #5a7594);
	box-shadow: 0 5px 10px rgba(47, 71, 99, 0.3);
}

.notice-rule-item:hover {
	transform: translateY(-2px);
	box-shadow: 0 12px 18px rgba(31, 45, 61, 0.12);
}

.notice-rule-item h3 {
	font-size: 1.02rem;
	color: #2f4763;
	letter-spacing: 0.01em;
}

.notice-rule-item p {
	line-height: 1.78;
	font-size: 0.94rem;
	color: #4b5f74;
}

.deadline-wrapper {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 0.95rem;
}

.leaderboard-main {
	width: min(980px, calc(100% - 3rem));
	margin: 2.5rem auto 4rem;
	display: grid;
	gap: 1.2rem;
}

.faq-main {
	width: min(980px, calc(100% - 3rem));
	margin: 2.5rem auto 4rem;
	display: grid;
	gap: 1.2rem;
}

.faq-hero {
	text-align: center;
}

.faq-quick-links {
	justify-content: center;
}

.faq-list {
	display: grid;
	gap: 0.72rem;
}

.faq-item {
	border: 1px solid rgba(143, 155, 173, 0.38);
	border-radius: 12px;
	padding: 0.78rem 0.9rem;
	background: linear-gradient(130deg, #ffffff, rgba(244, 247, 251, 0.95));
}

.faq-item summary {
	list-style: none;
	font-weight: 700;
	font-size: 0.98rem;
	color: #334d67;
	cursor: pointer;
	position: relative;
	padding-right: 1.2rem;
}

.faq-item summary::-webkit-details-marker {
	display: none;
}

.faq-item summary::after {
	content: '+';
	position: absolute;
	right: 0;
	top: 0;
	font-weight: 700;
	color: #5f738a;
}

.faq-item[open] summary::after {
	content: '-';
}

.faq-item p {
	margin: 0.62rem 0 0;
	font-size: 0.94rem;
	color: #4a5e73;
	line-height: 1.72;
}

.leaderboard-hero {
	text-align: center;
}

.leaderboard-stats {
	margin-top: 0.8rem;
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 0.8rem;
}

.stat-item {
	border: 1px solid rgba(143, 155, 173, 0.34);
	border-radius: 12px;
	padding: 0.8rem;
	background: linear-gradient(135deg, #ffffff, rgba(244, 247, 251, 0.95));
}

.stat-item strong {
	display: block;
	font-size: 1.15rem;
	color: var(--midnight);
	margin-top: 0.2rem;
}

.stat-label {
	font-size: 0.86rem;
	color: #617086;
}

.leaderboard-podium .content-head {
	margin-bottom: 0.8rem;
}

.podium-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 0.8rem;
	align-items: end;
}

.podium-card {
	border: 1px solid rgba(143, 155, 173, 0.3);
	border-radius: 14px;
	padding: 0.85rem 0.9rem;
	background: #ffffff;
	text-align: center;
}

.podium-rank {
	font-size: 0.85rem;
	font-weight: 700;
	color: #5f6f83;
	margin-bottom: 0.25rem;
}

.podium-card h3 {
	font-size: 1.02rem;
	margin-bottom: 0.25rem;
}

.podium-card p {
	margin: 0;
	font-size: 0.92rem;
}

.rank-1-card {
	transform: translateY(-5px);
	border-color: rgba(226, 138, 74, 0.45);
	box-shadow: 0 0 0 1px rgba(226, 138, 74, 0.25), 0 0 16px rgba(255, 215, 0, 0.35);
	background: linear-gradient(160deg, rgba(255, 255, 255, 1), rgba(255, 236, 208, 0.42));
}

.rank-2-card {
	background: linear-gradient(160deg, #ffffff, rgba(232, 237, 245, 0.52));
}

.rank-3-card {
	background: linear-gradient(160deg, #ffffff, rgba(244, 236, 230, 0.52));
}

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

.tracks-main {
	width: min(1080px, calc(100% - 3.2rem));
	margin: 2.8rem auto 4.2rem;
	display: grid;
	gap: 1.35rem;
}

.tracks-overview {
	text-align: center;
}

.tracks-overview .lead-text {
	max-width: 78ch;
	margin: 0.4rem auto 0;
}

.overview-tags {
	margin-top: 1rem;
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 0.6rem;
}

.overview-tags span {
	padding: 0.38rem 0.72rem;
	border: 1px solid rgba(143, 155, 173, 0.45);
	border-radius: 999px;
	font-size: 0.88rem;
	color: #4b5d70;
	background: rgba(255, 255, 255, 0.82);
}

.track-card {
	gap: 0.9rem;
}

.track-head p {
	margin-top: 0.42rem;
	margin-bottom: 0;
	font-size: 0.95rem;
}

.track-grid {
	margin-top: 1rem;
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 0.95rem;
}

.track-panel {
	background: linear-gradient(130deg, #ffffff, rgba(244, 247, 251, 0.95));
	border: 1px solid rgba(143, 155, 173, 0.34);
	border-radius: 14px;
	padding: 0.95rem 1rem;
}

.track-panel p {
	margin: 0.5rem 0 0;
	font-size: 0.94rem;
}

.sample-block {
	margin: 0.55rem 0 0;
	padding: 0.8rem;
	border-radius: 10px;
	border: 1px solid rgba(47, 71, 99, 0.24);
	background: #f7f9fc;
	font-size: 0.86rem;
	line-height: 1.55;
	color: #2f4257;
	overflow-x: auto;
}

.track-metrics {
	margin-top: 0.95rem;
	padding-top: 0.85rem;
	border-top: 1px dashed rgba(143, 155, 173, 0.45);
}

.track-metrics ul {
	margin: 0.55rem 0 0;
	padding-left: 1.1rem;
	line-height: 1.72;
	color: var(--text-sub);
	font-size: 0.95rem;
}

.leaderboard-card {
	background: #ffffff;
	border: 1px solid var(--line);
	border-radius: 18px;
	padding: 1.3rem;
	box-shadow: 0 12px 24px rgba(31, 45, 61, 0.08);
}

.leaderboard-card table {
	margin: 0;
}

.leaderboard-table thead th {
	font-size: 0.9rem;
	font-weight: 700;
	color: #465971;
	border-bottom-color: rgba(143, 155, 173, 0.35);
}

.leaderboard-table tbody td {
	font-size: 0.93rem;
	color: #445569;
	vertical-align: middle;
}

.leaderboard-card .rank-1 {
	position: relative;
	box-shadow: 0 0 0 1px rgba(255, 127, 80, 0.25), 0 0 16px rgba(255, 215, 0, 0.4);
	background: linear-gradient(90deg, rgba(255, 215, 0, 0.14), rgba(255, 255, 255, 0));
}

.leaderboard-note ul {
	margin: 0.55rem 0 0;
	padding-left: 1.2rem;
	line-height: 1.7;
	font-size: 0.95rem;
	color: var(--text-sub);
}

.deadline-panel {
	background: linear-gradient(150deg, #ffffff 0%, rgba(247, 250, 253, 0.96) 100%);
	border: 1px solid rgba(143, 155, 173, 0.3);
	border-radius: 16px;
	padding: 1.08rem 1.05rem;
	box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65), 0 8px 18px rgba(31, 45, 61, 0.07);
}

.deadline-panel h3 {
	position: relative;
	padding-left: 0.82rem;
	margin-bottom: 0.72rem;
}

.deadline-panel h3::before {
	content: '';
	position: absolute;
	left: 0;
	top: 0.4em;
	width: 0.42rem;
	height: 0.42rem;
	border-radius: 50%;
	background: var(--accent);
}

.deadline-panel ul {
	margin: 0.72rem 0 0;
	padding-left: 1.2rem;
	color: var(--text-sub);
	line-height: 1.72;
	font-size: 0.95rem;
}

.deadline-panel li span {
	color: #3f586f;
	font-weight: 700;
	margin-right: 0.3rem;
}

.schedule-list {
	list-style: none;
	padding: 0 !important;
	margin: 0.4rem 0 0 !important;
	display: grid;
	gap: 0.64rem;
	position: relative;
}

.schedule-list::before {
	content: '';
	position: absolute;
	left: 0.58rem;
	top: 0.45rem;
	bottom: 0.45rem;
	width: 2px;
	background: linear-gradient(180deg, rgba(226, 138, 74, 0.78), rgba(47, 71, 99, 0.22));
}

.schedule-list li {
	position: relative;
	padding: 0.62rem 0.7rem 0.62rem 1.5rem;
	border: 1px solid rgba(143, 155, 173, 0.24);
	border-radius: 12px;
	background: rgba(255, 255, 255, 0.88);
	transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.schedule-list li::before {
	content: '';
	position: absolute;
	left: 0.32rem;
	top: 1rem;
	width: 0.54rem;
	height: 0.54rem;
	border-radius: 50%;
	background: #ffffff;
	border: 2px solid var(--accent);
	box-shadow: 0 0 0 3px rgba(226, 138, 74, 0.15);
}

.schedule-list li:hover {
	transform: translateX(2px);
	border-color: rgba(47, 71, 99, 0.36);
	box-shadow: 0 8px 14px rgba(31, 45, 61, 0.1);
}

.schedule-date {
	display: inline-block;
	font-size: 0.88rem;
	font-weight: 700;
	color: #35506a;
	margin-right: 0;
	background: rgba(47, 71, 99, 0.1);
	border-radius: 999px;
	padding: 0.16rem 0.56rem;
	margin: 0 0 0.3rem;
}

.schedule-list li p {
	margin: 0;
	line-height: 1.56;
	font-size: 0.93rem;
	color: #42576d;
}

.final-checklist {
	list-style: none;
	padding: 0 !important;
	margin: 0.4rem 0 0 !important;
	display: grid;
	gap: 0.62rem;
}

.final-checklist li {
	display: grid;
	grid-template-columns: 2.2rem 1fr;
	gap: 0.65rem;
	align-items: start;
	padding: 0.66rem 0.72rem;
	border-radius: 12px;
	background: linear-gradient(150deg, rgba(47, 71, 99, 0.08), rgba(143, 155, 173, 0.08));
	border: 1px solid rgba(143, 155, 173, 0.3);
}

.check-index {
	display: inline-grid;
	place-items: center;
	margin-right: 0;
	width: 2rem;
	height: 2rem;
	border-radius: 50%;
	font-size: 0.8rem;
	font-weight: 800;
	letter-spacing: 0.02em;
	color: #ffffff;
	background: linear-gradient(140deg, #2f4763, #5f7c9a);
	box-shadow: 0 6px 12px rgba(47, 71, 99, 0.24);
}

.final-checklist li p {
	margin: 0.08rem 0 0;
	line-height: 1.58;
	font-size: 0.93rem;
	color: #42576d;
}

.contact-mail {
	margin-top: 1rem;
	margin-bottom: 0;
	text-align: center;
	font-size: 0.94rem;
	color: #5b6b7e;
}

.contact-mail a {
	color: var(--primary);
	font-weight: 600;
	text-decoration: none;
	border-bottom: 1px dashed rgba(47, 71, 99, 0.52);
}

.contact-mail a:hover {
	color: var(--midnight);
	border-bottom-color: rgba(44, 62, 80, 0.65);
}

footer {
	background: rgba(255, 255, 255, 0.65) !important;
	border-top: 1px solid rgba(143, 155, 173, 0.28);
	color: #5d6f80;
	font-size: 0.92rem;
}

@keyframes rise-in {
	from {
		opacity: 0;
		transform: translateY(20px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

@media (max-width: 900px) {
	.navbar {
		padding: 0.64rem 0;
	}

	.navbar .container {
		flex-direction: column;
		align-items: flex-start;
		gap: 0.5rem;
	}

	.navbar .navbar-nav {
		flex-wrap: wrap;
		row-gap: 0.35rem;
	}

	.navbar .nav-link {
		font-size: 0.9rem;
		margin: 0 0.38rem;
	}

	.intro-layout,
	.notice-list,
	.highlight-grid,
	.deadline-wrapper {
		grid-template-columns: 1fr;
	}

	.schedule-list::before {
		left: 0.54rem;
	}

	.schedule-list li {
		padding-left: 1.42rem;
	}

	.schedule-list li::before {
		left: 0.29rem;
	}

	.final-checklist li {
		grid-template-columns: 2rem 1fr;
		gap: 0.58rem;
	}

	.check-index {
		width: 1.86rem;
		height: 1.86rem;
	}

	.notice-rule-item::before {
		top: -10px;
		right: 10px;
	}

	.intro-copy {
		max-width: none;
	}

	.content-block {
		padding: 1.32rem;
		border-radius: 16px;
	}

	.homepage-main {
		width: min(1080px, calc(100% - 1rem));
		margin-top: 1.2rem;
	}

	.leaderboard-main {
		width: min(980px, calc(100% - 1rem));
		margin-top: 1.3rem;
	}

	.faq-main {
		width: min(980px, calc(100% - 1rem));
		margin-top: 1.3rem;
	}

	.leaderboard-stats,
	.podium-grid,
	.leaderboard-track-grid {
		grid-template-columns: 1fr;
	}

	.rank-1-card {
		transform: none;
	}

	.tracks-main {
		width: min(1080px, calc(100% - 1rem));
		margin-top: 1.3rem;
		gap: 1rem;
	}

	.track-grid {
		grid-template-columns: 1fr;
	}
}