/* ============================================
   マミークラウド合同会社 - Design System
   デザイン⑤: ボールド・クラフト（温かみ×大胆）
   ============================================ */

/* --- CSS Variables --- */
:root {
  --color-bg: #f5f0e8;
  --color-surface: #ffffff;
  --color-surface-raised: #ede8df;
  --color-border: rgba(90, 60, 30, 0.15);
  --color-text: #3d3228;
  --color-text-muted: #7a6e62;
  --color-heading: #1a1410;
  --color-primary: #b5542a;
  --color-primary-glow: rgba(181, 84, 42, 0.1);
  --color-accent: #2d6a4f;
  --color-success: #2d6a4f;
  --font-sans: 'Inter', 'Noto Sans JP', -apple-system, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(60, 40, 20, 0.1);
  --transition: 0.2s ease;
  --max-width: 1200px;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

img {
  max-width: 100%;
  display: block;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 240, 232, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 2px solid var(--color-heading);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-heading);
  letter-spacing: -0.02em;
}

.site-logo:hover {
  color: var(--color-primary);
}

.site-nav {
  display: flex;
  gap: 1.5rem;
}

.site-nav a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.site-nav a:hover {
  color: var(--color-heading);
}

/* --- Hero --- */
.hero {
  padding: 5rem 0 4rem;
  background: var(--color-bg);
  text-align: center;
}

.hero-title {
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  font-weight: 900;
  color: var(--color-heading);
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 2rem;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border: 2px solid var(--color-heading);
}

.btn-primary:hover {
  background: #9a4420;
  color: #fff;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-heading);
  border: 2px solid var(--color-heading);
}

.btn-secondary:hover {
  background: var(--color-heading);
  color: var(--color-surface);
}

/* --- Section --- */
.section-highlight,
.section-articles {
  padding: 4rem 0;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 2rem;
  letter-spacing: -0.02em;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.section-header .section-title {
  margin-bottom: 0;
}

.section-more {
  color: var(--color-primary);
  font-weight: 500;
  font-size: 0.9rem;
}

/* --- Product Grid & Cards --- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.product-card {
  display: flex;
  flex-direction: column;
  padding: 2rem;
  background: var(--color-surface);
  border: 3px solid var(--color-heading);
  border-radius: var(--radius);
  transition: all var(--transition);
  color: var(--color-text);
}

.product-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(60, 40, 20, 0.12);
  color: var(--color-text);
}

.product-card-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.product-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 0.5rem;
}

.product-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  flex: 1;
  margin-bottom: 1rem;
}

.product-card-link {
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 500;
}

/* --- Article Cards --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.card {
  display: block;
  padding: 1.5rem;
  background: var(--color-surface);
  border: 2px solid var(--color-heading);
  border-radius: var(--radius);
  transition: all var(--transition);
  color: var(--color-text);
}

.card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: var(--color-text);
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.8rem;
}

.card-category {
  background: var(--color-primary-glow);
  color: var(--color-primary);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-weight: 500;
}

.card-meta time {
  color: var(--color-text-muted);
}

.card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.card-excerpt {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  padding: 1.5rem 0 1rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem;
}

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

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

.breadcrumbs .separator {
  margin: 0 0.25rem;
}

.breadcrumbs .current {
  color: var(--color-heading);
}

/* --- Page Layout (sidebar + content) --- */
.page-layout,
.doc-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 2.5rem;
  padding-bottom: 4rem;
}

.page-sidebar,
.doc-sidebar {
  position: sticky;
  top: 80px;
  align-self: start;
}

.sidebar-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-nav {
  list-style: none;
}

.sidebar-nav li {
  margin-bottom: 0.25rem;
}

.sidebar-nav a {
  display: block;
  padding: 0.4rem 0.75rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.sidebar-nav a:hover {
  background: var(--color-surface-raised);
  color: var(--color-heading);
}

.sidebar-nav .active a {
  background: var(--color-primary-glow);
  color: var(--color-primary);
  font-weight: 500;
}

/* --- Page/Doc Content --- */
.page-content,
.doc-content {
  min-width: 0;
}

.page-content h1,
.doc-content h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 2rem;
  line-height: 1.3;
}

/* --- Product Hero --- */
.product-hero {
  padding: 3.5rem 0 3rem;
  background: var(--color-bg);
  text-align: center;
  border-bottom: 2px solid var(--color-heading);
}

.product-hero h1 {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--color-heading);
  margin-bottom: 0.75rem;
}

.product-hero .hero-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.product-body {
  padding: 3rem 0;
}

.product-catalog {
  padding: 2rem 0 4rem;
}

.product-catalog h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 1.5rem;
}

/* --- Doc Navigation (prev/next) --- */
.doc-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.doc-nav a {
  padding: 0.75rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  transition: all var(--transition);
}

.doc-nav a:hover {
  border-color: var(--color-primary);
}

/* --- Markdown Body --- */
.markdown-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
}

.markdown-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-heading);
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.markdown-body h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-heading);
  margin: 2rem 0 0.75rem;
}

.markdown-body p {
  margin-bottom: 1.25rem;
}

.markdown-body ul,
.markdown-body ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.markdown-body li {
  margin-bottom: 0.4rem;
}

.markdown-body code {
  font-family: 'SF Mono', monospace;
  background: var(--color-surface-raised);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}

.markdown-body pre {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  overflow-x: auto;
}

.markdown-body pre code {
  background: none;
  padding: 0;
}

.markdown-body blockquote {
  border-left: 3px solid var(--color-primary);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  background: var(--color-primary-glow);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.markdown-body img {
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  margin: 1.5rem 0;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
}

.markdown-body th,
.markdown-body td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.markdown-body th {
  font-weight: 600;
  color: var(--color-heading);
  background: var(--color-surface-raised);
}

/* --- Article Detail --- */
.article-header {
  padding: 3rem 0 2rem;
  text-align: center;
}

.article-header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-heading);
  max-width: 800px;
  margin: 0 auto;
}

.article-meta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.article-body {
  max-width: 800px;
  margin: 0 auto;
  padding-bottom: 4rem;
}

/* --- Article Content Readability + Craft Pattern B --- */
.article-content p {
  line-height: 1.9;
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}

.article-content li {
  line-height: 1.9;
  margin-bottom: 0.5rem;
}

/* Headings: craft card (案5 ベース) */
.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-heading);
  background: var(--color-surface);
  border: 2px solid var(--color-heading);
  padding: 0.9rem 1.25rem;
  margin: 3.5rem 0 1.5rem;
  border-radius: var(--radius-sm);
  box-shadow: 4px 4px 0 0 var(--color-primary);
  line-height: 1.45;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-heading);
  margin: 2.5rem 0 1rem;
  padding: 0.4rem 0 0.4rem 1rem;
  border-left: 4px solid var(--color-heading);
  line-height: 1.5;
}

.article-content h3::before {
  content: "▸";
  color: var(--color-primary);
  margin-right: 0.4rem;
  font-weight: 700;
}

.article-content h4 {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-heading);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  margin: 1.75rem 0 0.5rem;
  letter-spacing: 0.04em;
}

/* Lists: 四角マーカー（パターンB） */
.article-content ul {
  list-style: none;
  padding-left: 0;
  margin: 1.25rem 0;
}

.article-content ul li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.5rem;
}

.article-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 0.45rem;
  height: 0.45rem;
  background: var(--color-heading);
}

/* Inline emphasis: 細いオレンジ下線（パターンB） */
.article-content strong {
  font-weight: 700;
  color: var(--color-heading);
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: 0.05rem;
}

/* Images: 薄い枠線（パターンB） */
.article-content img {
  max-width: 55%;
  display: block;
  margin: 2rem auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

/* Inline links: ドット下線（パターンB） */
.article-content a {
  color: var(--color-primary);
  border-bottom: 1px dotted var(--color-primary);
}

/* Horizontal rule: 中央 60% の細線（パターンB） */
.article-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2.5rem auto;
  width: 60%;
}

/* --- Article Navigation (prev/next cards + back link) --- */
.article-nav-back {
  text-align: center;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.article-nav-back a {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  transition: color var(--transition);
}

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

.article-nav-cards {
  display: flex;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.nav-card {
  flex: 1;
  padding: 1.5rem;
  background: var(--color-surface);
  border: 2px solid var(--color-heading);
  border-radius: var(--radius);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.nav-card--next {
  text-align: right;
}

.nav-card:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-glow);
  transform: translateY(-2px);
}

.nav-card-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.nav-card-title {
  color: var(--color-heading);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.nav-card-spacer {
  flex: 1;
}

@media (max-width: 768px) {
  .article-nav-cards {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-card--next {
    text-align: left;
  }
}


/* --- Child Pages --- */
.child-pages {
  margin-top: 3rem;
}

.child-pages h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 1.25rem;
}

/* --- Footer --- */
.site-footer {
  background: #3d3228;
  border-top: 3px solid var(--color-heading);
  padding: 3rem 0 1.5rem;
  margin-top: 2rem;
  color: #d4cbc0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: #f5f0e8;
  margin-bottom: 1rem;
}

.footer-col p {
  font-size: 0.85rem;
  color: #b5aa9e;
  line-height: 1.6;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.4rem;
}

.footer-col a {
  font-size: 0.85rem;
  color: #d4cbc0;
}

.footer-col a:hover {
  color: #f5f0e8;
}

.footer-copy {
  font-size: 0.8rem;
  color: #b5aa9e;
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* --- Articles Hero --- */
.articles-hero {
  padding: 3.5rem 0 2.5rem;
  background: var(--color-bg);
  text-align: center;
  border-bottom: 2px solid var(--color-heading);
}

.articles-hero h1 {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--color-heading);
  margin-bottom: 0.75rem;
}

.articles-hero p {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* --- Tag Filter --- */
.tag-filter-section {
  padding: 1.5rem 0;
  background: rgba(245, 240, 232, 0.95);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 64px;
  z-index: 50;
  backdrop-filter: blur(12px);
}

.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.tag-btn {
  padding: 0.4rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: transparent;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition);
}

.tag-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-glow);
}

.tag-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* --- Article List Section --- */
.articles-list-section {
  padding: 2.5rem 0 4rem;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.article-card {
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}

.article-card-link {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 2px solid var(--color-heading);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
  color: var(--color-text);
  height: 100%;
}

.article-card-link:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(60, 40, 20, 0.12);
  color: var(--color-text);
}

.article-card-image {
  height: 180px;
  overflow: hidden;
  background: var(--color-surface-raised);
}

.article-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

.article-card-link:hover .article-card-image img {
  transform: scale(1.05);
}

.article-card-image--placeholder {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-raised);
  position: relative;
  overflow: hidden;
}

.article-card-image--placeholder .card-icon {
  font-size: 3rem;
  opacity: 0.8;
  z-index: 1;
}

.article-card-image--placeholder .card-cat-label {
  position: absolute;
  bottom: 0.75rem;
  right: 0.75rem;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-surface);
  background: rgba(60, 40, 20, 0.6);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  backdrop-filter: blur(4px);
}

.article-card-body {
  padding: 1.25rem 1.5rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.8rem;
}

.article-card-category {
  background: var(--color-primary-glow);
  color: var(--color-primary);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.75rem;
}

.article-card-date {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.article-card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 0.5rem;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-excerpt {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.75rem;
}

.article-tag {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-weight: 500;
}

/* Active nav */
.site-nav a.active {
  color: var(--color-primary);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .hero {
    padding: 3rem 0 2.5rem;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .hero-subtitle br {
    display: none;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }

  .tag-filter {
    gap: 0.35rem;
  }

  .tag-btn {
    font-size: 0.75rem;
    padding: 0.3rem 0.7rem;
  }

  .page-layout,
  .doc-layout {
    grid-template-columns: 1fr;
  }

  .page-sidebar,
  .doc-sidebar {
    position: static;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .site-nav {
    gap: 0.75rem;
  }

  .site-nav a {
    font-size: 0.8rem;
  }
}