:root {
	--bg: #070b14;
	--bg-elevated: #0f1626;
	--bg-card: rgba(18, 28, 48, 0.88);
	--border: rgba(148, 163, 184, 0.16);
	--text: #e8eefc;
	--muted: #93a4bd;
	--accent: #a78bfa;
	--accent-2: #22d3ee;
	--radius: 18px;
	--shadow: 0 18px 50px rgba(0, 0, 0, 0.42);
	--font: "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
	--header-bg: rgba(7, 11, 20, 0.78);
	--impl-bg: rgba(167, 139, 250, 0.12);
	--impl-border: rgba(167, 139, 250, 0.45);
	--impl-code: #f5e8ff;
	--note-bg: rgba(251, 191, 36, 0.08);
	--note-border: rgba(251, 191, 36, 0.28);
	--note-text: #fde68a;
	color-scheme: dark;
}

:root[data-theme="light"] {
	--bg: #f4f6fb;
	--bg-elevated: #ffffff;
	--bg-card: rgba(255, 255, 255, 0.94);
	--border: rgba(30, 41, 59, 0.12);
	--text: #1a2233;
	--muted: #5b6b85;
	--accent: #7c3aed;
	--accent-2: #0e7490;
	--shadow: 0 18px 40px rgba(30, 41, 59, 0.12);
	--header-bg: rgba(255, 255, 255, 0.82);
	--impl-bg: rgba(124, 58, 237, 0.08);
	--impl-border: rgba(124, 58, 237, 0.35);
	--impl-code: #5b21b6;
	--note-bg: rgba(245, 158, 11, 0.1);
	--note-border: rgba(180, 83, 9, 0.25);
	--note-text: #92400e;
	color-scheme: light;
}

* { box-sizing: border-box; }
html, body {
	margin: 0; min-height: 100%;
	background: var(--bg); color: var(--text);
	font-family: var(--font); line-height: 1.65;
}
body { position: relative; overflow-x: hidden; }
.bg-orb { position: fixed; border-radius: 50%; filter: blur(60px); pointer-events: none; z-index: 0; opacity: .5; }
.bg-orb-a { width: 420px; height: 420px; top: -120px; left: -80px; background: rgba(167,139,250,.35); }
.bg-orb-b { width: 360px; height: 360px; top: 30%; right: -100px; background: rgba(34,211,238,.15); }
:root[data-theme="light"] .bg-orb-a { background: rgba(124, 58, 237, 0.18); }
:root[data-theme="light"] .bg-orb-b { background: rgba(14, 116, 144, 0.12); }

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: min(1100px, calc(100% - 2rem)); margin: 0 auto; position: relative; z-index: 1; }

.site-header {
	position: sticky; top: 0; z-index: 20;
	backdrop-filter: blur(14px);
	background: var(--header-bg);
	border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .75rem 0; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--text); text-decoration: none; }
.brand-mark {
	width: 36px; height: 36px; display: grid; place-items: center;
	border-radius: 12px; color: var(--accent);
	background: rgba(167,139,250,.15); border: 1px solid rgba(167,139,250,.3);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-title { font-weight: 800; }
.brand-sub { font-size: .72rem; color: var(--muted); font-weight: 600; letter-spacing: .04em; text-transform: uppercase; }
.nav { display: flex; flex-wrap: wrap; gap: .35rem .55rem; align-items: center; }
.nav a { color: var(--muted); font-size: .88rem; font-weight: 600; padding: .35rem .6rem; border-radius: 999px; }
.nav a:hover { color: var(--text); background: rgba(148,163,184,.08); text-decoration: none; }
.nav-external { border: 1px solid var(--border) !important; }

#theme-toggle {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 34px;
	height: 34px;
	margin-left: 0.15rem;
	border-radius: 999px;
	border: 1px solid var(--border);
	background: transparent;
	color: var(--muted);
	cursor: pointer;
	transition: color 0.15s ease, background 0.15s ease;
}
#theme-toggle:hover {
	color: var(--text);
	background: rgba(148, 163, 184, 0.08);
}
#theme-toggle .icon-moon { display: none; }
:root[data-theme="light"] #theme-toggle .icon-sun { display: none; }
:root[data-theme="light"] #theme-toggle .icon-moon { display: block; }

.main { padding: 2rem 0 3.5rem; min-height: calc(100vh - 160px); }
.site-footer { border-top: 1px solid var(--border); padding: 1.5rem 0 2.5rem; color: var(--muted); font-size: .9rem; }
.footer-inner { display: flex; flex-direction: column; gap: .25rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }

.hero, .page-head { margin-bottom: 1.5rem; }
.eyebrow { color: var(--accent-2); text-transform: uppercase; letter-spacing: .1em; font-size: .75rem; font-weight: 800; margin: 0 0 .4rem; }
h1 { font-size: clamp(1.7rem, 3vw, 2.4rem); margin: 0 0 .55rem; font-weight: 800; }
h2 { font-size: 1.15rem; margin: 0 0 .65rem; }
.lede { color: var(--muted); max-width: 48rem; margin: 0 0 .75rem; }
.result-desc { color: var(--muted); margin: 0 0 1rem; }

.grid { display: grid; gap: 1rem; }
.pattern-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.card {
	background: linear-gradient(180deg, rgba(255,255,255,.03), transparent 40%), var(--bg-card);
	border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden;
}
.card-body { padding: 1.15rem 1.25rem 1.3rem; }
.pattern-card { color: inherit; text-decoration: none; transition: transform .15s ease, border-color .15s ease; }
.pattern-card:hover { transform: translateY(-3px); border-color: rgba(167,139,250,.5); text-decoration: none; color: inherit; }
.pattern-card h2 { font-size: 1.15rem; }
.pattern-card .takeaway {
	margin: 0.35rem 0 0.5rem;
	font-size: 0.98rem;
	font-weight: 700;
	color: var(--text);
	line-height: 1.45;
}
.pattern-card .card-summary { margin: 0 0 0.75rem; font-size: .9rem; }
.takeaway-inline {
	margin: 0 0 0.75rem;
	font-size: 0.95rem;
	font-weight: 600;
	color: var(--text);
}
.card-link { font-size: .88rem; font-weight: 700; color: var(--accent-2); }

/* 操作 → クラスの軌跡 */
.call-trace {
	margin-top: 1rem;
	padding: 0.85rem 1rem;
	border-radius: 12px;
	background: var(--bg-elevated);
	border: 1px dashed var(--border);
}
.call-trace-label {
	margin: 0 0 0.5rem;
	font-size: 0.75rem;
	font-weight: 800;
	letter-spacing: 0.05em;
	text-transform: uppercase;
	color: var(--accent-2);
}
.call-trace-list {
	margin: 0;
	padding-left: 1.15rem;
	font-size: 0.9rem;
	line-height: 1.55;
}
.call-trace-list li { margin: 0.25rem 0; }

/* パターンなし比較 */
.compare-panel { margin: 0 0 1.25rem; }
.compare-title { font-size: 1.05rem; margin: 0 0 0.35rem; }
.compare-lead { margin: 0 0 0.85rem; }
.compare-grid {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 0.85rem;
}
.compare-col-label {
	margin: 0 0 0.4rem;
	font-size: 0.78rem;
	font-weight: 800;
	text-transform: uppercase;
	letter-spacing: 0.04em;
}
.compare-bad .compare-col-label { color: #f87171; }
.compare-good .compare-col-label { color: #34d399; }
:root[data-theme="light"] .compare-bad .compare-col-label { color: #b91c1c; }
:root[data-theme="light"] .compare-good .compare-col-label { color: #047857; }
.compare-code {
	font-size: 0.78rem;
	min-height: 6rem;
	margin: 0;
}

/* ページ下部ナビ */
.pattern-footer-nav {
	margin-top: 2rem;
	padding-top: 1.25rem;
	border-top: 1px solid var(--border);
}
.pattern-footer-row {
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 0.75rem;
	flex-wrap: wrap;
}
.nav-placeholder { min-width: 6rem; }
.pattern-footer-links {
	margin: 0.9rem 0 0;
	font-size: 0.9rem;
	color: var(--muted);
	text-align: center;
}
.pattern-footer-links .sep { margin: 0 0.4rem; opacity: 0.6; }
.pattern-chips {
	display: flex;
	flex-wrap: wrap;
	gap: 0.45rem;
	align-items: center;
	justify-content: center;
	margin-top: 1rem;
}
.pattern-chips-label {
	font-size: 0.78rem;
	font-weight: 700;
	color: var(--muted);
	margin-right: 0.25rem;
}
.pattern-chip {
	display: inline-flex;
	padding: 0.35rem 0.7rem;
	border-radius: 999px;
	border: 1px solid var(--border);
	font-size: 0.85rem;
	font-weight: 700;
	color: var(--muted);
	text-decoration: none;
	background: var(--bg-elevated);
}
.pattern-chip:hover {
	color: var(--text);
	border-color: var(--accent);
	text-decoration: none;
}
.pattern-chip.is-current {
	color: #fff;
	background: linear-gradient(135deg, #c4b5fd, #7c3aed);
	border-color: transparent;
}
:root[data-theme="light"] .pattern-chip.is-current {
	color: #fff;
}
.result-card .stat-value { font-size: 2rem; font-weight: 800; margin: .5rem 0; }

/* 実装クラスを目立たせるパネル */
.impl-panel {
	margin-top: 1rem;
	padding: 1rem 1.1rem;
	border-radius: 14px;
	background: var(--impl-bg);
	border: 1px solid var(--impl-border);
	box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}
.impl-panel-label {
	margin: 0 0 0.4rem;
	font-size: 0.78rem;
	font-weight: 800;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--accent);
}
.impl-panel-class {
	margin: 0 0 0.45rem;
	line-height: 1.4;
}
.impl-panel-class code {
	display: inline-block;
	font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
	font-size: 1.2rem;
	font-weight: 800;
	color: var(--impl-code);
	background: rgba(0, 0, 0, 0.2);
	padding: 0.35rem 0.65rem;
	border-radius: 10px;
	border: 1px solid var(--impl-border);
}
:root[data-theme="light"] .impl-panel-class code {
	background: rgba(124, 58, 237, 0.08);
}
.impl-panel-hint {
	margin: 0;
	font-size: 0.88rem;
	color: var(--muted);
}

/* このデモでパターンを使う理由（デモ操作より上に置く） */
.why-panel {
	margin: 0 0 1rem;
}
.page-head {
	margin-bottom: 1rem;
}
.why-panel-title {
	font-size: 1.05rem;
	margin: 0 0 0.75rem;
}
.why-panel-name {
	color: var(--accent);
}
.why-list {
	margin: 0 0 0.85rem;
	padding-left: 1.2rem;
	color: var(--text);
}
.why-list li {
	margin: 0.4rem 0;
	line-height: 1.55;
}
.why-panel-footer {
	margin: 0;
	padding-top: 0.65rem;
	border-top: 1px solid var(--border);
}

/* 記事リンクの注記（デモ ≠ 記事ソース） */
.article-note {
	margin: 0.75rem 0 0;
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	gap: 0.55rem;
}
.article-note-text {
	margin: 0;
	max-width: 40rem;
	padding: 0.7rem 0.9rem;
	border-radius: 12px;
	font-size: 0.9rem;
	line-height: 1.55;
	color: var(--note-text);
	background: var(--note-bg);
	border: 1px solid var(--note-border);
}
.article-note-text strong {
	font-weight: 800;
}

.chip {
	display: inline-flex; padding: .15rem .55rem; border-radius: 999px;
	font-size: .72rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase;
	color: #ddd6fe; background: rgba(167,139,250,.18); border: 1px solid rgba(167,139,250,.3);
}
:root[data-theme="light"] .chip {
	color: #5b21b6;
	background: rgba(124, 58, 237, 0.1);
	border-color: rgba(124, 58, 237, 0.25);
}

.btn {
	display: inline-flex; align-items: center; justify-content: center;
	padding: .65rem 1.1rem; border-radius: 999px; border: none;
	background: linear-gradient(135deg, #c4b5fd, #7c3aed); color: #fff;
	font-weight: 800; cursor: pointer; text-decoration: none; font-size: .92rem;
}
.btn:hover { filter: brightness(1.08); text-decoration: none; color: #fff; }
.btn-secondary { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-ghost { background: transparent; border: none; color: var(--muted); box-shadow: none; padding: .35rem .6rem; }

.demo-form { display: flex; flex-direction: column; gap: .75rem; margin-top: .5rem; }
.demo-form label, label { display: flex; flex-direction: column; gap: .35rem; font-size: .85rem; color: var(--muted); font-weight: 600; }
.demo-form label.check { flex-direction: row; align-items: center; color: var(--text); }
input, select {
	width: 100%; padding: .65rem .75rem; border-radius: 12px;
	border: 1px solid var(--border); background: var(--bg-elevated); color: var(--text); font: inherit;
}
.inline-form { display: inline-flex; margin: .25rem .35rem .25rem 0; }

.flash { padding: .85rem 1rem; border-radius: 14px; margin-bottom: 1rem; border: 1px solid var(--border); }
.flash-success { background: rgba(52,211,153,.12); color: #047857; }
:root:not([data-theme="light"]) .flash-success { color: #a7f3d0; }
.flash-error { background: rgba(248,113,113,.12); color: #b91c1c; }
:root:not([data-theme="light"]) .flash-error { color: #fecaca; }

.breadcrumb { color: var(--muted); font-size: .9rem; margin: 0 0 1rem; }
.block { margin: 1rem 0; }
.section-head.tight { display: flex; justify-content: space-between; align-items: center; margin-bottom: .5rem; }
.section-head.tight h2 { margin: 0; }
.code-block {
	background: var(--bg-elevated); border: 1px solid var(--border); border-radius: 12px;
	padding: 1rem; overflow: auto; font-size: .84rem; color: var(--text); white-space: pre-wrap;
}
.simple-table { width: 100%; border-collapse: collapse; }
.simple-table th, .simple-table td { text-align: left; padding: .65rem .4rem; border-bottom: 1px solid var(--border); }
.simple-table th { color: var(--muted); font-size: .8rem; text-transform: uppercase; }
.plain-list { list-style: none; padding: 0; margin: 0 0 1rem; }
.plain-list li { display: flex; align-items: center; justify-content: space-between; padding: .4rem 0; border-bottom: 1px solid var(--border); }
hr.soft { border: none; border-top: 1px solid var(--border); margin: 1rem 0; }
code { font-family: ui-monospace, Menlo, monospace; font-size: .88em; background: rgba(148,163,184,.12); padding: .1rem .35rem; border-radius: 6px; }

@media (max-width: 800px) {
	.detail-grid { grid-template-columns: 1fr; }
	.compare-grid { grid-template-columns: 1fr; }
	.nav a:nth-child(n+3):nth-child(-n+7) { display: none; }
	.pattern-footer-row { justify-content: center; }
}