/* ==========================================================================
   Neon Fantasia — Theme Stylesheet
   ========================================================================== */

:root {
	--nf-bg-void: #06070c;
	--nf-bg-deep: #0b0e16;
	--nf-bg-panel: rgba(20, 24, 38, 0.72);
	--nf-bg-panel-solid: #141626;

	--nf-magenta: #ff2ea6;
	--nf-cyan: #29e7ff;
	--nf-green: #6dffb0;
	--nf-amber: #ffb347;

	--nf-text-main: #eef0fb;
	--nf-text-dim: #8b93ad;

	--nf-border: rgba(41, 231, 255, 0.25);
	--nf-glow-cyan: 0 0 18px rgba(41, 231, 255, 0.55);
	--nf-glow-magenta: 0 0 18px rgba(255, 46, 166, 0.5);

	--nf-font-head: 'Zen Kaku Gothic New', 'Noto Sans JP', sans-serif;
	--nf-font-accent: 'Orbitron', sans-serif;
	--nf-font-body: 'Noto Sans JP', sans-serif;

	--nf-radius: 14px;
	--nf-max-width: 1180px;
}

/* ---- Reset & base ---- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
	margin: 0;
	background: var(--nf-bg-void);
	background-image:
		radial-gradient(ellipse 60% 40% at 15% 0%, rgba(255, 46, 166, 0.12), transparent 60%),
		radial-gradient(ellipse 50% 35% at 90% 15%, rgba(41, 231, 255, 0.12), transparent 60%),
		radial-gradient(ellipse 60% 40% at 50% 100%, rgba(109, 255, 176, 0.08), transparent 60%);
	color: var(--nf-text-main);
	font-family: var(--nf-font-body);
	line-height: 1.8;
	overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
	font-family: var(--nf-font-head);
	font-weight: 700;
	margin: 0 0 0.5em;
	letter-spacing: 0.02em;
}

.nf-main { position: relative; z-index: 1; }

/* ---- Root system background (scroll-grown) ---- */
.nf-roots-bg {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	z-index: 0;
	pointer-events: none;
	overflow: hidden;
}
.nf-roots-bg svg { display: block; opacity: 0.85; }

.nf-root-trunk {
	transition: stroke-dashoffset 0.25s linear;
	opacity: 0.65;
}
.nf-root-branch {
	transition: stroke-dashoffset 1.4s cubic-bezier(0.22, 1, 0.36, 1);
	opacity: 0.55;
}
.nf-root-branch.is-grown {
	stroke-dashoffset: 0 !important;
}
.nf-root-node {
	opacity: 0;
	transition: opacity 1.8s ease 0.6s;
}
.nf-root-branch.is-grown + .nf-root-node,
.nf-root-node.is-grown {
	opacity: 0.9;
	animation: nf-node-pulse 3.2s ease-in-out infinite;
}
@keyframes nf-node-pulse {
	0%, 100% { opacity: 0.55; }
	50% { opacity: 1; }
}

@media (max-width: 700px) {
	.nf-roots-bg svg { opacity: 0.55; }
}

/* ---- Floating particles (mossy sparks) ---- */
.nf-particles {
	position: fixed;
	inset: 0;
	pointer-events: none;
	z-index: 0;
	overflow: hidden;
}
.nf-particles span {
	position: absolute;
	bottom: -10px;
	width: 3px;
	height: 3px;
	border-radius: 50%;
	background: var(--nf-green);
	box-shadow: 0 0 6px 2px currentColor;
	opacity: 0.7;
	animation: nf-float 12s linear infinite;
}

@keyframes nf-float {
	0% { transform: translateY(0) translateX(0); opacity: 0; }
	10% { opacity: 0.8; }
	90% { opacity: 0.6; }
	100% { transform: translateY(-110vh) translateX(20px); opacity: 0; }
}

/* ---- Header ---- */
.nf-site-header {
	position: sticky;
	top: 0;
	z-index: 50;
	background: rgba(6, 7, 12, 0.75);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid var(--nf-border);
}
.nf-header-inner {
	max-width: var(--nf-max-width);
	margin: 0 auto;
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 14px 24px;
}
.nf-logo {
	display: flex;
	align-items: center;
}
.nf-logo-svg {
	display: inline-flex;
	align-items: center;
	line-height: 0;
	color: var(--nf-cyan);
	filter: drop-shadow(0 0 10px rgba(41, 231, 255, 0.55));
}
.nf-logo-svg svg {
	display: block;
	height: 22px;
	width: auto;
}
.screen-reader-text {
	position: absolute;
	width: 1px;
	height: 1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
}
.nf-menu {
	display: flex;
	gap: 28px;
	list-style: none;
	margin: 0;
	padding: 0;
}
.nf-menu a {
	font-size: 14px;
	letter-spacing: 0.08em;
	color: var(--nf-text-dim);
	transition: color 0.25s, text-shadow 0.25s;
	position: relative;
}
.nf-menu a:hover,
.nf-menu a:focus {
	color: var(--nf-cyan);
	text-shadow: var(--nf-glow-cyan);
}
.nf-nav-toggle {
	display: none;
	flex-direction: column;
	gap: 5px;
	background: none;
	border: none;
	cursor: pointer;
	padding: 8px;
}
.nf-nav-toggle span {
	width: 22px;
	height: 2px;
	background: var(--nf-cyan);
	box-shadow: var(--nf-glow-cyan);
}

/* ---- Buttons ---- */
.nf-btn {
	display: inline-block;
	padding: 13px 30px;
	border-radius: 999px;
	font-family: var(--nf-font-head);
	font-weight: 700;
	font-size: 14px;
	letter-spacing: 0.08em;
	transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
}
.nf-btn-primary {
	background: linear-gradient(120deg, var(--nf-magenta), var(--nf-cyan));
	color: #06070c;
	box-shadow: 0 0 24px rgba(41, 231, 255, 0.35);
}
.nf-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 34px rgba(41, 231, 255, 0.55); }
.nf-btn-ghost {
	border: 1px solid var(--nf-border);
	color: var(--nf-cyan);
	background: rgba(41, 231, 255, 0.05);
}
.nf-btn-ghost:hover { background: rgba(41, 231, 255, 0.15); box-shadow: var(--nf-glow-cyan); }

/* ---- Hero ---- */
.nf-hero {
	position: relative;
	min-height: 92vh;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	text-align: center;
	padding: 60px 24px;
	overflow: hidden;
	background-image: var(--nf-hero-bg, none);
	background-size: cover;
	background-position: center;
}
.nf-hero::before {
	content: "";
	position: absolute;
	inset: 0;
	background:
		radial-gradient(circle at 20% 20%, rgba(255, 46, 166, 0.25), transparent 45%),
		radial-gradient(circle at 80% 30%, rgba(41, 231, 255, 0.25), transparent 45%),
		radial-gradient(circle at 50% 90%, rgba(109, 255, 176, 0.18), transparent 50%);
	animation: nf-hero-pulse 10s ease-in-out infinite alternate;
}
@keyframes nf-hero-pulse {
	0% { opacity: 0.7; }
	100% { opacity: 1; }
}
.nf-hero-overlay {
	position: absolute;
	inset: 0;
	background: linear-gradient(180deg, rgba(6,7,12,0.55) 0%, rgba(6,7,12,0.85) 100%);
}
.nf-hero-content { position: relative; z-index: 2; max-width: 720px; }
.nf-hero-logo img { max-height: 90px; margin: 0 auto 24px; filter: drop-shadow(0 0 20px rgba(41,231,255,0.6)); }
.nf-hero-title {
	font-size: clamp(28px, 5vw, 48px);
	color: var(--nf-text-main);
	text-shadow: 0 0 24px rgba(41, 231, 255, 0.4);
	margin-bottom: 18px;
}
.nf-hero-desc { color: var(--nf-text-dim); margin-bottom: 32px; font-size: 15px; }
.nf-hero-scroll {
	position: absolute;
	bottom: 28px;
	left: 50%;
	transform: translateX(-50%);
	color: var(--nf-cyan);
	font-size: 22px;
	animation: nf-bounce 2s ease-in-out infinite;
	z-index: 2;
}
@keyframes nf-bounce {
	0%, 100% { transform: translate(-50%, 0); opacity: 0.6; }
	50% { transform: translate(-50%, 8px); opacity: 1; }
}

/* ---- Sections ---- */
.nf-section { max-width: var(--nf-max-width); margin: 0 auto; padding: 90px 24px; }
.nf-section-eyebrow {
	display: block;
	font-family: var(--nf-font-accent);
	font-size: 12px;
	letter-spacing: 0.3em;
	color: var(--nf-magenta);
	text-shadow: var(--nf-glow-magenta);
	margin-bottom: 10px;
}
.nf-section-title { font-size: clamp(22px, 3.4vw, 32px); margin-bottom: 44px; }
.nf-empty-state { color: var(--nf-text-dim); text-align: center; padding: 40px 0; }

/* ---- Release grid & cards ---- */
.nf-release-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
	gap: 28px;
}
.nf-release-card {
	background: var(--nf-bg-panel);
	border: 1px solid var(--nf-border);
	border-radius: var(--nf-radius);
	overflow: hidden;
	transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.nf-release-card:hover {
	transform: translateY(-6px);
	border-color: var(--nf-cyan);
	box-shadow: 0 12px 30px rgba(41, 231, 255, 0.18);
}
.nf-release-card-link { display: block; }
.nf-release-cover {
	position: relative;
	aspect-ratio: 1 / 1;
	background: linear-gradient(145deg, #1a1d2e, #0b0e16);
	overflow: hidden;
}
.nf-release-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.nf-release-card:hover .nf-release-cover img { transform: scale(1.06); }
.nf-release-cover-fallback {
	width: 100%; height: 100%;
	background: repeating-linear-gradient(45deg, rgba(41,231,255,0.08) 0 2px, transparent 2px 12px);
}
.nf-release-play {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 34px;
	color: #fff;
	background: rgba(6,7,12,0.35);
	opacity: 0;
	transition: opacity 0.25s;
	text-shadow: var(--nf-glow-cyan);
}
.nf-release-card:hover .nf-release-play { opacity: 1; }
.nf-release-info { padding: 18px 18px 22px; }
.nf-release-title { font-size: 17px; margin-bottom: 8px; color: var(--nf-text-main); }
.nf-release-flavor { font-size: 12.5px; color: var(--nf-text-dim); font-style: italic; margin: 0 0 10px; }
.nf-release-date {
	display: inline-block;
	font-family: var(--nf-font-accent);
	font-size: 11px;
	letter-spacing: 0.08em;
	color: var(--nf-green);
}
.nf-view-all { text-align: center; margin-top: 48px; }

/* ---- About section ---- */
.nf-about { text-align: center; }
.nf-about-inner { max-width: 680px; margin: 0 auto; color: var(--nf-text-dim); }

/* ---- Single release ---- */
.nf-single-hero {
	position: relative;
	min-height: 52vh;
	display: flex;
	align-items: flex-end;
	padding: 60px 24px 48px;
	overflow: hidden;
}
.nf-single-hero-bg {
	position: absolute;
	inset: 0;
	background-size: cover;
	background-position: center;
	filter: blur(2px) brightness(0.55) saturate(1.2);
	transform: scale(1.05);
}
.nf-single-hero-overlay {
	position: absolute;
	inset: 0;
	background: linear-gradient(180deg, rgba(6,7,12,0.2) 0%, rgba(6,7,12,0.95) 100%);
}
.nf-single-hero-content { position: relative; z-index: 2; max-width: var(--nf-max-width); margin: 0 auto; width: 100%; }
.nf-single-title { font-size: clamp(26px, 4.5vw, 42px); margin: 6px 0 12px; text-shadow: var(--nf-glow-magenta); }
.nf-single-flavor { color: var(--nf-text-dim); font-style: italic; font-size: 15px; }

.nf-single-body {
	max-width: var(--nf-max-width);
	margin: 0 auto;
	padding: 56px 24px;
	display: grid;
	grid-template-columns: 1.2fr 1fr;
	gap: 48px;
	align-items: start;
}
.nf-video-frame { position: relative; width: 100%; aspect-ratio: 16 / 9; border-radius: var(--nf-radius); overflow: hidden; border: 1px solid var(--nf-border); box-shadow: 0 0 40px rgba(41,231,255,0.15); }
.nf-video-frame iframe { width: 100%; height: 100%; border: 0; }
.nf-single-description { margin-top: 26px; color: var(--nf-text-dim); }

/* ---- Lyrics scroll panel ---- */
.nf-lyrics-toggle {
	width: 100%;
	display: flex;
	align-items: center;
	gap: 12px;
	padding: 16px 22px;
	background: var(--nf-bg-panel);
	border: 1px solid var(--nf-border);
	border-radius: var(--nf-radius);
	color: var(--nf-text-main);
	font-family: var(--nf-font-head);
	font-size: 15px;
	letter-spacing: 0.05em;
	cursor: pointer;
	transition: box-shadow 0.25s, border-color 0.25s;
}
.nf-lyrics-toggle:hover { border-color: var(--nf-amber); box-shadow: 0 0 20px rgba(255, 179, 71, 0.2); }
.nf-lyrics-toggle-icon { display: inline-flex; align-items: center; transition: transform 0.4s ease; }
.nf-lyrics-toggle-icon svg {
	width: 26px;
	height: 16px;
	display: block;
	color: var(--nf-amber);
	filter: drop-shadow(0 0 4px rgba(255, 179, 71, 0.55));
	transition: color 0.3s, filter 0.3s;
}
.nf-lyrics-toggle.is-open .nf-lyrics-toggle-icon { transform: scale(1.08); }
.nf-lyrics-toggle.is-open .nf-lyrics-toggle-icon svg {
	color: var(--nf-cyan);
	filter: drop-shadow(0 0 7px rgba(41, 231, 255, 0.65));
}
.nf-lyrics-toggle.is-open { border-color: var(--nf-amber); box-shadow: 0 0 20px rgba(255, 179, 71, 0.25); }

.nf-lyrics-panel {
	overflow: hidden;
	max-height: 0;
	opacity: 0;
	transform: scaleY(0.85);
	transform-origin: top;
	transition: max-height 0.6s cubic-bezier(0.65,0,0.35,1), opacity 0.5s ease, transform 0.6s cubic-bezier(0.65,0,0.35,1);
	margin-top: 14px;
	border-radius: var(--nf-radius);
	background:
		radial-gradient(circle at 0% 0%, rgba(255, 179, 71, 0.08), transparent 50%),
		var(--nf-bg-panel-solid);
	border: 1px solid rgba(255, 179, 71, 0.25);
}
.nf-lyrics-panel.is-open { opacity: 1; transform: scaleY(1); }
.nf-lyrics-panel-inner { padding: 28px 26px; max-height: 560px; overflow-y: auto; }
.nf-lyrics-lines { font-size: 15.5px; }
.nf-lyric-line {
	margin: 0 0 10px;
	color: var(--nf-text-dim);
	transition: color 0.3s, text-shadow 0.3s;
}
.nf-lyric-line.is-active {
	color: var(--nf-amber);
	text-shadow: 0 0 12px rgba(255,179,71,0.5);
}
.nf-lyric-break { height: 12px; }
.nf-lyrics-empty { color: var(--nf-text-dim); font-style: italic; }

.nf-single-tags { max-width: var(--nf-max-width); margin: 0 auto; padding: 0 24px 40px; display: flex; gap: 10px; flex-wrap: wrap; }
.nf-tag {
	font-size: 12px;
	padding: 6px 14px;
	border-radius: 999px;
	border: 1px solid var(--nf-border);
	color: var(--nf-cyan);
}

.nf-single-nav {
	max-width: var(--nf-max-width);
	margin: 0 auto;
	padding: 30px 24px 80px;
	display: flex;
	justify-content: space-between;
	gap: 16px;
	border-top: 1px solid var(--nf-border);
	font-size: 13px;
	color: var(--nf-text-dim);
	flex-wrap: wrap;
}
.nf-single-nav-link:hover { color: var(--nf-cyan); }
.nf-single-nav-link.nf-all { font-family: var(--nf-font-head); color: var(--nf-magenta); }

/* ---- Generic page/post ---- */
.nf-page, .nf-post-list { max-width: 860px; margin: 0 auto; padding: 80px 24px; }
.nf-page-title { font-size: clamp(26px, 4vw, 38px); }
.nf-page-thumb { margin: 24px 0; border-radius: var(--nf-radius); overflow: hidden; }
.nf-page-content, .nf-page-content p { color: var(--nf-text-dim); }
.nf-post-item { padding: 26px 0; border-bottom: 1px solid var(--nf-border); }
.nf-post-item-title a:hover { color: var(--nf-cyan); }

.nf-pagination { display: flex; justify-content: center; gap: 16px; margin-top: 40px; }
.nf-pagination .page-numbers { color: var(--nf-text-dim); padding: 8px 14px; }
.nf-pagination .page-numbers.current { color: var(--nf-cyan); text-shadow: var(--nf-glow-cyan); }

/* ---- Footer ---- */
.nf-site-footer {
	border-top: 1px solid var(--nf-border);
	margin-top: 60px;
	padding: 60px 24px 36px;
	text-align: center;
	background: linear-gradient(180deg, transparent, rgba(41,231,255,0.04));
}
.nf-footer-inner { max-width: var(--nf-max-width); margin: 0 auto; }
.nf-footer-tagline { color: var(--nf-text-dim); font-size: 13px; margin-top: 10px; }
.nf-footer-sns { display: flex; justify-content: center; gap: 22px; margin: 26px 0; }
.nf-sns-link { font-family: var(--nf-font-accent); font-size: 12px; letter-spacing: 0.1em; color: var(--nf-text-dim); }
.nf-sns-link:hover { color: var(--nf-cyan); text-shadow: var(--nf-glow-cyan); }
.nf-footer-copy { color: var(--nf-text-dim); font-size: 12px; margin-top: 20px; opacity: 0.7; }

/* ---- Responsive ---- */
@media (max-width: 860px) {
	.nf-single-body { grid-template-columns: 1fr; }
	.nf-primary-nav { display: none; }
	.nf-nav-toggle { display: flex; }
	.nf-primary-nav.is-open { display: block; position: absolute; top: 100%; left: 0; right: 0; background: rgba(6,7,12,0.97); padding: 20px 24px; }
	.nf-primary-nav.is-open .nf-menu { flex-direction: column; gap: 18px; }
}