/*
 * QUOREA Support — Stripe-inspired design system
 * Reference: stripe-DESIGN.md
 *
 * Typography: Inter (Latin) + Noto Sans JP (Japanese)
 *   - sohne-var requires commercial license, Inter is closest open-source match
 *   - ss01 OpenType feature emulated via font-feature-settings on Inter
 *
 * Color tokens: Stripe Purple (#533afd), Deep Navy (#061b31), Slate (#64748d)
 * Shadow philosophy: blue-tinted multi-layer
 * Radius: 4-8px conservative
 */

/* ============================================
 * CSS Reset / Foundation
 * ============================================ */
*,
*::before,
*::after {
	box-sizing: border-box;
}

html {
	font-size: 16px;
	-webkit-text-size-adjust: 100%;
	scroll-behavior: smooth;
}

body {
	margin: 0;
	background: var(--surface);
	color: var(--body);
	font-family: "Inter", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	font-weight: 300;
	font-size: 16px;
	line-height: 1.6;
	font-feature-settings: "ss01", "tnum";
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

img,
svg {
	max-width: 100%;
	height: auto;
	display: block;
}

a {
	color: var(--primary);
	text-decoration: none;
	transition: color 120ms ease;
}

a:hover {
	color: var(--primary-hover);
}

/* ============================================
 * Design Tokens
 * ============================================ */
:root {
	/* Primary */
	--primary: #533afd;
	--primary-hover: #4434d4;
	--primary-deep: #2e2b8c;
	--primary-light: #b9b9f9;
	--primary-soft: #d6d9fc;

	/* Surface */
	--surface: #ffffff;
	--surface-subtle: #f6f9fc;
	--surface-dark: #1c1e54;

	/* Text */
	--heading: #061b31;
	--label: #273951;
	--body: #64748d;
	--body-muted: #94a3b8;

	/* Borders */
	--border: #e5edf5;
	--border-strong: #061b31;

	/* Status */
	--success: #15be53;
	--success-text: #108c3d;
	--warning: #f5b800;
	--danger: #ea2261;
	--accent-magenta: #f96bee;
	--accent-magenta-light: #ffd7ef;

	/* Shadows (signature blue-tinted multi-layer) */
	--shadow-ambient: rgba(23, 23, 23, 0.06) 0 3px 6px;
	--shadow-card: rgba(23, 23, 23, 0.08) 0 15px 35px 0;
	--shadow-card-hover:
		rgba(50, 50, 93, 0.25) 0 30px 45px -30px,
		rgba(0, 0, 0, 0.1) 0 18px 36px -18px;
	--shadow-modal:
		rgba(3, 3, 39, 0.25) 0 14px 21px -14px,
		rgba(0, 0, 0, 0.1) 0 8px 17px -8px;
	--shadow-focus: 0 0 0 3px rgba(83, 58, 253, 0.2);

	/* Radius */
	--radius-sm: 4px;
	--radius-md: 6px;
	--radius-lg: 8px;
	--radius-pill: 999px;

	/* Spacing scale (8px base) */
	--space-1: 4px;
	--space-2: 8px;
	--space-3: 12px;
	--space-4: 16px;
	--space-5: 24px;
	--space-6: 32px;
	--space-8: 48px;
	--space-10: 64px;
	--space-12: 96px;
}

/* ============================================
 * Typography
 * ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
	color: var(--heading);
	font-weight: 300;
	letter-spacing: -0.02em;
	margin: 0 0 var(--space-4);
	line-height: 1.15;
}

h1 {
	font-size: 56px;
	letter-spacing: -1.4px;
	line-height: 1.15;
	/* Japanese chars need more vertical breathing room than Stripe's
	   Latin-only sohne-var. 1.03 clips JP glyphs at the top. */
}

.hero-title {
	padding-top: 0.1em; /* extra safety against ascender clipping */
}

h2 {
	font-size: 40px;
	letter-spacing: -0.96px;
	line-height: 1.1;
}

h3 {
	font-size: 28px;
	letter-spacing: -0.5px;
	line-height: 1.15;
}

h4 {
	font-size: 22px;
	letter-spacing: -0.22px;
	line-height: 1.2;
}

h5 {
	font-size: 18px;
	font-weight: 400;
	letter-spacing: normal;
	line-height: 1.3;
}

h6 {
	font-size: 14px;
	font-weight: 500;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: var(--label);
}

p {
	margin: 0 0 var(--space-4);
	color: var(--body);
}

.lead {
	font-size: 18px;
	color: var(--body);
	line-height: 1.5;
}

.eyebrow {
	font-size: 13px;
	font-weight: 500;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: var(--primary);
	margin-bottom: var(--space-2);
}

/* Responsive heading scale */
@media (max-width: 768px) {
	h1 {
		font-size: 36px;
		letter-spacing: -0.8px;
	}

	h2 {
		font-size: 28px;
		letter-spacing: -0.5px;
	}

	h3 {
		font-size: 22px;
	}
}

/* ============================================
 * Layout primitives
 * ============================================ */
.container {
	max-width: 1080px;
	margin: 0 auto;
	padding: 0 var(--space-5);
}

.container-narrow {
	max-width: 720px;
	margin: 0 auto;
	padding: 0 var(--space-5);
}

.section {
	padding: var(--space-12) 0;
}

@media (max-width: 768px) {
	.section {
		padding: var(--space-8) 0;
	}
}

.section-dark {
	background: var(--surface-dark);
	color: rgba(255, 255, 255, 0.85);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4,
.section-dark h5,
.section-dark h6 {
	color: #ffffff;
}

.grid {
	display: grid;
	gap: var(--space-5);
}

.grid-2 {
	grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
	grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
	grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 900px) {
	.grid-3,
	.grid-4 {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

@media (max-width: 600px) {
	.grid-2,
	.grid-3,
	.grid-4 {
		grid-template-columns: 1fr;
	}
}

/* ============================================
 * Navbar
 * ============================================ */
.navbar {
	position: sticky;
	top: 0;
	z-index: 100;
	background: rgba(255, 255, 255, 0.92);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border-bottom: 1px solid var(--border);
}

.navbar-inner {
	max-width: 1080px;
	margin: 0 auto;
	padding: var(--space-3) var(--space-5);
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-5);
}

.navbar-brand {
	display: inline-flex;
	align-items: center;
	gap: var(--space-3);
	color: var(--heading);
	font-size: 18px;
	font-weight: 500;
	letter-spacing: -0.02em;
	text-decoration: none;
}

.navbar-brand:hover {
	color: var(--heading);
}

/* QUOREA wordmark — Q がブランド紫、残りが Deep Navy */
.brand-logo {
	font-family: "Inter", "Noto Sans JP", -apple-system, BlinkMacSystemFont, sans-serif;
	font-weight: 600;
	font-size: 20px;
	letter-spacing: -0.04em;
	color: var(--heading);
	line-height: 1;
	display: inline-flex;
	align-items: baseline;
}

.brand-logo-q {
	color: var(--primary);
}

.navbar-brand-text {
	font-family: "Inter", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	color: var(--body);
	font-size: 14px;
	font-weight: 400;
	border-left: 1px solid var(--border);
	padding-left: var(--space-3);
	letter-spacing: 0;
}

.navbar-nav {
	display: flex;
	align-items: center;
	gap: var(--space-5);
}

.navbar-link {
	font-family: "Inter", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	font-size: 14px;
	letter-spacing: 0;
}

@media (max-width: 640px) {
	.navbar-brand-text {
		display: none;
	}

	.navbar-nav {
		gap: var(--space-3);
	}
}

/* ============================================
 * Buttons
 * ============================================ */
.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: var(--space-2);
	padding: 10px 18px;
	border-radius: var(--radius-sm);
	font-size: 16px;
	font-weight: 400;
	line-height: 1;
	cursor: pointer;
	border: 1px solid transparent;
	transition: background 120ms ease, color 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
	text-decoration: none;
}

.btn-primary {
	background: var(--primary);
	color: #ffffff;
}

.btn-primary:hover {
	background: var(--primary-hover);
	color: #ffffff;
}

.btn-ghost {
	background: transparent;
	color: var(--primary);
	border-color: var(--primary-light);
}

.btn-ghost:hover {
	background: rgba(83, 58, 253, 0.05);
}

.btn-sm {
	padding: 6px 12px;
	font-size: 14px;
}

.btn:focus-visible {
	outline: none;
	box-shadow: var(--shadow-focus);
}

/* ============================================
 * Article actions (back-to-top / category links)
 * ============================================ */
.article-actions {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-3);
	margin-top: var(--space-8);
	padding-top: var(--space-6);
	border-top: 1px solid var(--border);
}

.btn-back,
.btn-back-secondary {
	display: inline-flex;
	align-items: center;
	gap: 4px;
	padding: 10px 18px;
	border-radius: 6px;
	font-size: 14px;
	font-weight: 500;
	line-height: 1;
	text-decoration: none;
	transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
}

.btn-back {
	background: var(--heading);
	color: #ffffff;
}

.btn-back:hover {
	background: #1a2a3f;
	color: #ffffff;
}

.btn-back-secondary {
	background: transparent;
	color: var(--heading);
	border: 1px solid var(--border);
}

.btn-back-secondary:hover {
	background: var(--surface-subtle);
	color: var(--heading);
	border-color: #cbd2db;
}

.article-contact-prompt {
	margin-top: var(--space-6);
	padding: var(--space-4) var(--space-5);
	background: var(--surface-subtle);
	border-radius: 8px;
	border: 1px solid var(--border);
}

.article-contact-prompt p {
	margin: 0;
	font-size: 14px;
	color: var(--body);
}

.article-contact-prompt a {
	color: var(--primary);
	font-weight: 500;
}

/* ============================================
 * Hero (homepage)
 * ============================================ */
.hero {
	padding: 96px 0 80px;
	position: relative;
	overflow: hidden;
	background:
		radial-gradient(ellipse 80% 50% at 50% 0%, rgba(83, 58, 253, 0.06), transparent 60%),
		radial-gradient(ellipse 60% 40% at 80% 10%, rgba(249, 107, 238, 0.04), transparent 70%),
		linear-gradient(180deg, #ffffff 0%, var(--surface-subtle) 100%);
}

.hero::after {
	content: "";
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	height: 1px;
	background: linear-gradient(90deg, transparent, var(--border) 30%, var(--border) 70%, transparent);
}

.hero-inner {
	max-width: 720px;
	margin: 0 auto;
	padding: 0 var(--space-5);
	text-align: center;
	position: relative;
}

.hero-title {
	margin-bottom: var(--space-3);
}

.hero-subtitle {
	font-size: 18px;
	color: var(--body);
	margin-bottom: var(--space-6);
	padding: 0 18px;
	text-align: left;
	line-height: 1.6;
}

/* ============================================
 * Cards
 * ============================================ */
.card {
	display: flex;
	flex-direction: column;
	gap: var(--space-3);
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: var(--radius-lg);
	padding: var(--space-5) var(--space-5);
	transition: box-shadow 200ms cubic-bezier(0.4, 0, 0.2, 1),
		transform 200ms cubic-bezier(0.4, 0, 0.2, 1),
		border-color 200ms ease;
	text-decoration: none;
	color: inherit;
	position: relative;
}

.card::after {
	content: "→";
	position: absolute;
	top: var(--space-5);
	right: var(--space-5);
	color: var(--primary);
	font-size: 18px;
	font-weight: 400;
	opacity: 0;
	transform: translateX(-6px);
	transition: opacity 200ms ease, transform 200ms ease;
}

.card:hover {
	box-shadow: var(--shadow-card-hover);
	border-color: var(--primary-soft);
	transform: translateY(-3px);
	color: inherit;
}

.card:hover::after {
	opacity: 1;
	transform: translateX(0);
}

.card:hover .card-title {
	color: var(--primary);
}

.card-title {
	transition: color 160ms ease;
}

.card-icon {
	width: 36px;
	height: 36px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	border-radius: var(--radius-md);
	background: rgba(83, 58, 253, 0.08);
	color: var(--primary);
	flex-shrink: 0;
}

.card-icon svg {
	width: 20px;
	height: 20px;
}

.card-title {
	font-size: 18px;
	font-weight: 500;
	color: var(--heading);
	margin: 0;
	line-height: 1.3;
}

.card-body {
	font-size: 14px;
	color: var(--body);
	margin: 0;
	line-height: 1.5;
}

.card-meta {
	font-size: 12px;
	color: var(--body-muted);
	margin-top: auto;
	padding-top: var(--space-3);
	border-top: 1px solid var(--border);
}

/* Compact card for FAQ links */
.card-compact {
	padding: var(--space-4) var(--space-5);
}

.card-compact .card-title {
	font-size: 16px;
}

.card-compact .card-body {
	font-size: 14px;
}

/* ============================================
 * Search (Pagefind override)
 * ============================================ */
:root {
	--pagefind-ui-scale: 1;
	--pagefind-ui-primary: var(--primary);
	--pagefind-ui-text: var(--heading);
	--pagefind-ui-background: var(--surface);
	--pagefind-ui-border: var(--border);
	--pagefind-ui-tag: var(--surface-subtle);
	--pagefind-ui-border-width: 1px;
	--pagefind-ui-border-radius: var(--radius-lg);
	--pagefind-ui-image-border-radius: var(--radius-sm);
	--pagefind-ui-image-box-ratio: 3 / 2;
	--pagefind-ui-font: inherit;
}

.pagefind-ui {
	width: 100%;
}

.pagefind-ui form input {
	padding: 14px 18px !important;
	font-size: 17px !important;
	border: 1px solid var(--border) !important;
	border-radius: var(--radius-lg) !important;
	box-shadow: var(--shadow-card) !important;
	background: var(--surface) !important;
	color: var(--heading) !important;
}

.pagefind-ui form input:focus {
	outline: none !important;
	border-color: var(--primary) !important;
	box-shadow: var(--shadow-focus) !important;
}

.pagefind-ui__result-title a {
	color: var(--heading) !important;
	font-weight: 500 !important;
}

.pagefind-ui__result-excerpt {
	color: var(--body) !important;
}

/* ============================================
 * Article (FAQ page body)
 * ============================================ */
.article {
	max-width: 720px;
	margin: 0 auto;
	padding: var(--space-8) var(--space-5);
}

.article-breadcrumb {
	font-size: 13px;
	color: var(--body-muted);
	margin-bottom: var(--space-4);
}

.article-breadcrumb a {
	color: var(--body-muted);
}

.article-breadcrumb a:hover {
	color: var(--primary);
}

.article-breadcrumb-separator {
	margin: 0 var(--space-2);
	color: var(--body-muted);
}

.article-title {
	margin-bottom: var(--space-5);
}

.article-body {
	color: var(--body);
	font-size: 16px;
	line-height: 1.7;
}

.article-body h2 {
	font-size: 24px;
	margin-top: var(--space-8);
	margin-bottom: var(--space-3);
}

.article-body h3 {
	font-size: 20px;
	margin-top: var(--space-6);
	margin-bottom: var(--space-3);
}

.article-body p {
	margin-bottom: var(--space-4);
}

.article-body ul,
.article-body ol {
	margin: 0 0 var(--space-4);
	padding-left: var(--space-5);
}

.article-body li {
	margin-bottom: var(--space-2);
}

.article-body img {
	margin: var(--space-5) 0;
	border-radius: var(--radius-md);
	box-shadow: var(--shadow-ambient);
}

.article-body code {
	background: var(--surface-subtle);
	padding: 2px 6px;
	border-radius: var(--radius-sm);
	font-family: "SF Mono", "Monaco", "Cascadia Code", monospace;
	font-size: 0.9em;
	color: var(--heading);
}

.article-body pre {
	background: var(--surface-subtle);
	padding: var(--space-4);
	border-radius: var(--radius-md);
	overflow-x: auto;
	border: 1px solid var(--border);
}

.article-body blockquote {
	border-left: 3px solid var(--primary);
	padding-left: var(--space-4);
	margin: var(--space-5) 0;
	color: var(--label);
}

.article-body a {
	color: var(--primary);
	border-bottom: 1px solid transparent;
}

.article-body a:hover {
	border-bottom-color: var(--primary);
}

/* ============================================
 * Footer
 * ============================================ */
.site-footer {
	background: var(--surface-dark);
	color: rgba(255, 255, 255, 0.7);
	padding: var(--space-10) 0 var(--space-6);
	margin-top: var(--space-12);
}

.site-footer .container {
	max-width: 1080px;
}

.footer-links {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-3) var(--space-5);
	margin-bottom: var(--space-6);
}

.footer-links a {
	color: rgba(255, 255, 255, 0.7);
	font-size: 14px;
}

.footer-links a:hover {
	color: #ffffff;
}

.footer-legal {
	font-size: 12px;
	color: rgba(255, 255, 255, 0.5);
	line-height: 1.6;
	padding-top: var(--space-5);
	border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ============================================
 * Utility
 * ============================================ */
.text-center {
	text-align: center;
}

.text-muted {
	color: var(--body-muted);
}

.mt-4 {
	margin-top: var(--space-4);
}

.mt-6 {
	margin-top: var(--space-6);
}

.mt-8 {
	margin-top: var(--space-8);
}

.hide {
	display: none;
}

.section-tight {
	padding: var(--space-8) 0;
}