/* CAD Gallery — 静的サイトのスタイル。ライト／ダークはOS設定に追従する。 */

:root {
	--bg: #f7f8fa;
	--surface: #ffffff;
	--surface-2: #eef1f5;
	--text: #171b21;
	--text-muted: #5c6672;
	--border: #dde2e9;
	--accent: #2f6df6;
	--accent-soft: #e7eefe;
	--shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .06);
	--radius: 14px;
	--wrap: 1120px;

	/* ソースコードの配色 */
	--code-bg: #fbfcfe;
	--code-keyword: #a238a0;
	--code-string: #3f8c3f;
	--code-comment: #8b95a3;
	--code-number: #b4670a;
	--code-builtin: #0a7fa8;
	--code-def: #3563d6;
}

@media (prefers-color-scheme: dark) {
	:root {
		--bg: #0f1216;
		--surface: #161a20;
		--surface-2: #1d222a;
		--text: #e8ecf1;
		--text-muted: #99a3b0;
		--border: #2a313b;
		--accent: #7ba4ff;
		--accent-soft: #1b2740;
		--shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 30px rgba(0, 0, 0, .35);

		--code-bg: #12161c;
		--code-keyword: #c98bdd;
		--code-string: #96c882;
		--code-comment: #79838f;
		--code-number: #d7a06a;
		--code-builtin: #5fb8c8;
		--code-def: #7aa8f5;
	}
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
	margin: 0;
	background: var(--bg);
	color: var(--text);
	font-family: system-ui, -apple-system, "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", sans-serif;
	line-height: 1.75;
	font-size: 16px;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { line-height: 1.3; letter-spacing: .01em; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em; background: var(--surface-2); padding: .1em .35em; border-radius: 5px; }
.muted { color: var(--text-muted); }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: 20px; }

.skip-link {
	position: absolute; left: -9999px;
	background: var(--surface); padding: 10px 16px; border-radius: 8px; z-index: 10;
}
.skip-link:focus { left: 16px; top: 12px; }

/* ---- header / footer ---- */

.site-header {
	position: sticky; top: 0; z-index: 5;
	background: color-mix(in srgb, var(--bg) 88%, transparent);
	backdrop-filter: blur(8px);
	border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 650; color: var(--text); text-decoration: none; }
.brand-mark {
	width: 18px; height: 18px; border-radius: 4px;
	background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 40%, #9b6bff));
	box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .25);
}
.site-nav { display: flex; gap: 18px; font-size: .94rem; }
.site-nav a { color: var(--text-muted); text-decoration: none; }
.site-nav a:hover { color: var(--text); }

.site-footer {
	margin-top: 72px; padding: 32px 0 48px;
	border-top: 1px solid var(--border); color: var(--text-muted); font-size: .9rem;
}
.site-footer p { margin: 2px 0; }

/* ---- index ---- */

.hero { padding: 56px 0 28px; }
.hero h1 { margin: 0 0 8px; font-size: clamp(1.9rem, 4vw, 2.6rem); }
.lead { margin: 0; color: var(--text-muted); font-size: 1.05rem; }
.hero-meta { margin: 14px 0 0; color: var(--text-muted); font-size: .88rem; letter-spacing: .04em; }

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 26px; }
.chip {
	font: inherit; font-size: .86rem; line-height: 1.4;
	padding: 5px 13px; border-radius: 999px;
	border: 1px solid var(--border); background: var(--surface); color: var(--text-muted);
	cursor: pointer;
}
.chip:hover { color: var(--text); }
.chip.is-active { background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 40%, transparent); color: var(--text); }

.grid {
	list-style: none; margin: 0; padding: 0;
	display: grid; gap: 22px;
	grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.card {
	background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
	overflow: hidden; box-shadow: var(--shadow);
	transition: transform .16s ease, box-shadow .16s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 2px 4px rgba(16, 24, 40, .08), 0 14px 32px rgba(16, 24, 40, .12); }
.card-link { display: block; color: inherit; text-decoration: none; }
/* SVG 図面は濃い線色なので、ダークテーマでも下地は明るいままにする */
.card-thumb { display: block; background: #f8fafc; border-bottom: 1px solid var(--border); }
.card-thumb img { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; padding: 10px; }
.card-body { display: block; padding: 14px 16px 4px; }
.card-title { display: block; font-weight: 640; }
.card-summary { display: block; margin-top: 4px; color: var(--text-muted); font-size: .92rem; }
.card-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; color: var(--text-muted); font-size: .82rem; }

.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0 16px 14px; }
.tags li {
	font-size: .76rem; color: var(--text-muted);
	border: 1px solid var(--border); border-radius: 999px; padding: 1px 9px;
}

.empty { color: var(--text-muted); padding: 24px 0 40px; }

/* ---- work page ---- */

.work { padding: 28px 0 0; }
.breadcrumb { color: var(--text-muted); font-size: .88rem; margin: 0 0 18px; }
.breadcrumb a { color: var(--text-muted); }
.work-head h1 { margin: 0 0 8px; font-size: clamp(1.6rem, 3.4vw, 2.2rem); }
.work-meta { display: flex; flex-wrap: wrap; gap: 8px 14px; margin: 14px 0 0; color: var(--text-muted); font-size: .88rem; }
.work-meta .tag { border: 1px solid var(--border); border-radius: 999px; padding: 0 10px; }

.viewer-block { margin: 24px 0 40px; }
.viewer {
	position: relative;
	aspect-ratio: 16 / 10;
	min-height: 320px;
	border: 1px solid var(--border); border-radius: var(--radius);
	background: var(--surface-2);
	overflow: hidden;
	display: grid; place-items: center;
}
.viewer-canvas { display: block; width: 100%; height: 100%; touch-action: none; cursor: grab; }
.viewer-canvas:active { cursor: grabbing; }
.viewer.is-fallback { background: #f8fafc; }
.viewer.is-fallback img { max-height: 100%; object-fit: contain; padding: 16px; }
.viewer-status { position: absolute; margin: 0; color: var(--text-muted); font-size: .9rem; }

.viewer-bar {
	display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center;
	margin-top: 12px;
}
.viewer-controls, .downloads { display: flex; flex-wrap: wrap; gap: 8px; }
.viewer-controls button, .button {
	font: inherit; font-size: .88rem; line-height: 1.5;
	padding: 6px 14px; border-radius: 9px; cursor: pointer;
	border: 1px solid var(--border); background: var(--surface); color: var(--text);
	text-decoration: none;
}
.viewer-controls button:hover, .button:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.viewer-controls button.is-active { background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 40%, transparent); }
.button.ghost { background: transparent; color: var(--text-muted); }

.columns { display: grid; gap: 36px; grid-template-columns: minmax(0, 1fr) 280px; align-items: start; }
@media (max-width: 820px) { .columns { grid-template-columns: 1fr; } }

.prose h2, .sources h2, .col-side h2 { font-size: 1.05rem; letter-spacing: .02em; margin: 0 0 12px; }
.prose :is(p, ul, ol) { margin: 0 0 1em; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose pre { background: var(--surface-2); padding: 14px 16px; border-radius: 10px; overflow-x: auto; }
.prose pre code { background: none; padding: 0; }

.sources { margin-top: 36px; }
.source-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.source-grid figure { margin: 0; }
.source-grid img { border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.source-grid figcaption { margin-top: 6px; color: var(--text-muted); font-size: .82rem; }

/* ---- source code ---- */

.source-code { margin-top: 36px; }
.code-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px 16px; }
.code-head h2 { font-size: 1.05rem; letter-spacing: .02em; margin: 0 0 12px; }
.code-meta { display: flex; align-items: center; gap: 12px; margin: 0 0 12px; font-size: .85rem; }

.code {
	margin: 0;
	max-height: 60vh;
	min-height: 0;
	overflow: auto;
	overscroll-behavior: contain;
	background: var(--code-bg);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	padding: 14px 16px 14px 0;
	font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
	font-size: .82rem;
	line-height: 1.7;
	tab-size: 4;
	counter-reset: line;
}
.code:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.code code { background: none; padding: 0; font-size: inherit; }

/* 行番号は CSS の生成内容。コピーや選択には入らない。 */
.code-line::before {
	counter-increment: line;
	content: counter(line);
	display: inline-block;
	width: 4ch;
	margin-right: 1.5ch;
	text-align: right;
	color: var(--text-muted);
	opacity: .55;
	user-select: none;
	-webkit-user-select: none;
}

.tok-k { color: var(--code-keyword); }
.tok-s { color: var(--code-string); }
.tok-c { color: var(--code-comment); font-style: italic; }
.tok-num { color: var(--code-number); }
.tok-b { color: var(--code-builtin); }
.tok-d { color: var(--code-def); font-weight: 620; }
.tok-o { color: var(--text-muted); }

.col-side {
	background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
	padding: 18px 20px; box-shadow: var(--shadow);
}
.spec { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; margin: 0; font-size: .92rem; }
.spec dt { color: var(--text-muted); }
.spec dd { margin: 0; font-variant-numeric: tabular-nums; }
.side-link { margin: 16px 0 0; font-size: .9rem; }

.pager {
	display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
	margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--border); font-size: .92rem;
}
.pager-next { margin-left: auto; text-align: right; }

@media (prefers-reduced-motion: reduce) {
	* { transition: none !important; animation: none !important; }
}