/* ==========================================================================
   Site chrome : テーマ色、nav、scroll-guide、footer、reveal
   対象: #body_wrap.lk-art（home + contact）
   テーマ: .lk-theme-dark（黒背景）/ .lk-theme-light（紙色背景）
   ========================================================================== */

/* ---------- Theme base ---------- */
#body_wrap.lk-theme-dark {
	background: var(--ink) !important;
	color: var(--paper) !important;
}
#body_wrap.lk-theme-light {
	background: var(--paper) !important;
	color: var(--ink) !important;
}
#body_wrap.lk-theme-white {
	background: #ffffff !important;
	color: var(--ink) !important;
}
#body_wrap.lk-art a { color: inherit; text-decoration: none; }

/* ---------- Nav ---------- */
.lk-nav {
	position: fixed;
	top: 0; left: 0; right: 0;
	z-index: 100;
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 28px var(--gutter);
	background: transparent;
	font-family: var(--f-en);
}
/* テーマ別テキスト色 */
#body_wrap.lk-theme-dark .lk-nav { color: var(--paper); }
#body_wrap.lk-theme-light .lk-nav,
#body_wrap.lk-theme-white .lk-nav { color: var(--ink); }

.lk-nav__brand {
	font-size: clamp(15px, 1.3vw, 18px);
	letter-spacing: 0.3em;
	font-weight: 500;
}
.lk-nav__utils {
	display: flex;
	gap: clamp(20px, 2vw, 32px);
	font-size: clamp(13px, 1vw, 15px);
	letter-spacing: 0.22em;
	font-weight: 400;
}
.lk-nav__utils a::before { content: "+ "; color: currentColor; opacity: 0.5; }

/* ---------- Hamburger toggle (mobile only) ---------- */
.lk-nav__toggle {
	display: none;
	width: 36px;
	height: 28px;
	padding: 0;
	background: transparent;
	border: none;
	cursor: pointer;
	position: relative;
	z-index: 2;
}
.lk-nav__toggle-bar {
	display: block;
	width: 100%;
	height: 1px;
	background: currentColor;
	margin: 9px 0;
	transition: transform 0.3s, opacity 0.3s;
}

/* ---------- Tablet 〜 Mobile (≤1080px): hamburger drawer ----------
   6リンク（Home/Services/Cases/Work/Another Eye/Contact）が1行に収まる
   PC幅を確保するため、1080px 未満ではハンバーガーへ切り替える */
@media (max-width: 1080px) {
	.lk-nav__toggle { display: block; }

	.lk-nav__utils {
		position: fixed;
		inset: 0;
		background: var(--ink);
		color: var(--paper);
		flex-direction: column;
		align-items: center;
		justify-content: center;
		gap: 36px;
		font-size: 16px;
		letter-spacing: 0.24em;
		opacity: 0;
		visibility: hidden;
		pointer-events: none;
		transition: opacity 0.3s, visibility 0.3s;
		z-index: 1;
	}
	.lk-nav.is-open .lk-nav__utils {
		opacity: 1;
		visibility: visible;
		pointer-events: auto;
	}
	/* light/white テーマ時はドロワー色を反転 */
	#body_wrap.lk-theme-light .lk-nav__utils {
		background: var(--paper);
		color: var(--ink);
	}
	#body_wrap.lk-theme-white .lk-nav__utils {
		background: #fff;
		color: var(--ink);
	}

	/* + → × アニメ */
	.lk-nav.is-open .lk-nav__toggle-bar:first-child {
		transform: translateY(5px) rotate(45deg);
	}
	.lk-nav.is-open .lk-nav__toggle-bar:last-child {
		transform: translateY(-5px) rotate(-45deg);
	}
}

/* ---------- Mobile (≤720px): hide scroll guide ---------- */
@media (max-width: 720px) {
	.lk-scroll-guide { display: none; }
}

/* ---------- Scroll guide ---------- */
.lk-scroll-guide {
	position: fixed;
	right: 24px;
	bottom: 32px;
	z-index: 80;
	writing-mode: vertical-rl;
	font-family: var(--f-en);
	font-size: 10px;
	letter-spacing: 0.3em;
	color: var(--paper-dim);
	text-transform: uppercase;
}

/* ---------- Chapter markers (e.g. 「（一）」) ---------- */
.lk-chapter {
	font-family: var(--f-jp);
	font-weight: 500;
	letter-spacing: 0.1em;
	font-size: 12px;
	color: var(--paper-dim);
}
.lk-chapter em { font-style: normal; }

/* ---------- Footer (default: dark) ---------- */
.lk-foot {
	padding: 56px var(--gutter) 32px;
	border-top: 1px solid var(--line);
	display: grid;
	grid-template-columns: 1fr;
	gap: 24px;
	font-family: var(--f-en);
	font-size: 11px;
	letter-spacing: 0.16em;
	color: var(--mute);
	text-transform: uppercase;
	background: var(--ink);
}
@media (min-width: 720px) {
	.lk-foot { grid-template-columns: 1fr 1fr 1fr; }
}
.lk-foot__brand { color: var(--paper); letter-spacing: 0.3em; }
.lk-foot__nav { display: flex; gap: 24px; }
.lk-foot__note { text-align: right; color: var(--paper-dim); }

/* ---------- Footer (light theme override) ---------- */
#body_wrap.lk-theme-light .lk-foot {
	background: var(--paper);
	color: var(--mute);
	border-top-color: rgba(7,7,7,0.08);
}
#body_wrap.lk-theme-light .lk-foot__brand { color: var(--ink); }
#body_wrap.lk-theme-light .lk-foot__note { color: rgba(7,7,7,0.5); }

/* ---------- Footer (white theme override) ---------- */
#body_wrap.lk-theme-white .lk-foot {
	background: #ffffff;
	color: var(--mute);
	border-top-color: rgba(7,7,7,0.08);
}
#body_wrap.lk-theme-white .lk-foot__brand { color: var(--ink); }
#body_wrap.lk-theme-white .lk-foot__note { color: rgba(7,7,7,0.5); }

/* ---------- Reveal ---------- */
[data-reveal] {
	opacity: 0;
	transform: translateY(28px);
	transition: opacity 1s ease, transform 1s ease;
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }