@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ===== リセット & ベース ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --col: repeat(12, 1fr);
  --gap: 1rem;
  --u: 0.5rem;
  --c-black: #000000;
  --c-white: #ffffff;
  --c-gray-100: #f5f5f5;
  --c-gray-200: #e8e8e8;
  --c-gray-400: #999999;
  --c-gray-600: #555555;
  --c-accent: #000000;
  --font-head: 'Space Grotesk', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-body: 'DM Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --radius: 10px;
  --max-w: 1280px;
  --header-h: 64px;
  --transition: 0.2s ease;
}

html {
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--c-black);
  background: var(--c-white);
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* ===== 共通ユーティリティ ===== */
.site-wrap {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
}

/* ===== ヘッダー / ナビゲーション ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-black);
  color: var(--c-white);
  border-bottom: 1px solid #222;
  height: var(--header-h);
}

.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 calc(var(--gap) * 2);
  gap: var(--gap);
}

.header-left,
.header-right {
  display: flex;
  align-items: center;
  gap: var(--gap);
}

.header-right {
  justify-content: flex-end;
}

.header-center {
  display: flex;
  justify-content: center;
}

.nav-brand {
  display: flex;
  align-items: center;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  color: var(--c-white);
  white-space: nowrap;
}

.nav-logo-img {
  height: 36px;
  width: auto;
}

.nav-side p {
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.25rem;
  align-items: center;
}

.nav-side p a {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.625rem;
  min-height: 40px;
  font-size: 0.8125rem;
  font-family: var(--font-head);
  font-weight: 500;
  color: rgba(255,255,255,0.8);
  border-radius: 4px;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}

.nav-side p a:hover,
.nav-side p a[aria-current="page"] {
  color: var(--c-white);
  background: rgba(255,255,255,0.1);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  min-height: 40px;
  background: var(--c-white);
  color: var(--c-black);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.8125rem;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: opacity var(--transition);
}

.nav-cta:hover {
  opacity: 0.85;
}

/* モバイルメニュートグル */
.nav-toggle {
  display: none;
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 6px;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-white);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  background: #111;
  border-top: 1px solid #333;
  padding: 1rem;
}

.mobile-menu nav p {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-menu nav p a {
  display: block;
  padding: 0.625rem 1rem;
  min-height: 44px;
  color: rgba(255,255,255,0.85);
  font-family: var(--font-head);
  font-size: 0.9375rem;
  border-radius: 6px;
  transition: background var(--transition);
}

.mobile-menu nav p a:hover {
  background: rgba(255,255,255,0.08);
  color: var(--c-white);
}

/* ===== ヒーロー ===== */
.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 45vh;
  overflow: hidden;
  border-bottom: 2px solid var(--c-black);
}

.hero-text-block {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-end;
  text-align: right;
  padding: calc(var(--gap) * 3) calc(var(--gap) * 3) calc(var(--gap) * 2.5);
  background: var(--c-white);
}

.hero-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--c-black);
  color: var(--c-white);
  font-family: var(--font-head);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 4px;
  margin-bottom: 1rem;
}

.hero-h1 {
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 3.5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.hero-lead {
  font-size: 1rem;
  color: var(--c-gray-600);
  line-height: 1.7;
  max-width: 36ch;
}

.hero-media {
  position: relative;
  overflow: hidden;
  background: var(--c-gray-100);
}

.hero-media--placeholder {
  background: repeating-linear-gradient(
    45deg,
    var(--c-gray-100),
    var(--c-gray-100) 10px,
    var(--c-gray-200) 10px,
    var(--c-gray-200) 20px
  );
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== メインレイアウト ===== */
.layout-main {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: calc(var(--gap) * 2);
  max-width: var(--max-w);
  margin: 0 auto;
  padding: calc(var(--gap) * 2.5) calc(var(--gap) * 2);
  width: 100%;
}

.layout-main--home {
  grid-template-columns: 1fr 260px;
}

.layout-main--about,
.layout-main--privacy {
  grid-template-columns: 1fr 240px;
}

/* ===== コンテンツエリア ===== */
.content-article {
  min-width: 0;
}

.content-section {
  margin-bottom: calc(var(--gap) * 3);
}

.content-section:last-child {
  margin-bottom: 0;
}

.content-header {
  margin-bottom: calc(var(--gap) * 2);
  padding-bottom: calc(var(--gap) * 1.5);
  border-bottom: 2px solid var(--c-black);
}

.page-h1 {
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.article-date {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--c-gray-400);
  font-family: var(--font-head);
  margin-top: 0.5rem;
}

.article-updated {
  display: inline-block;
  font-size: 0.8125rem;
  color: var(--c-gray-400);
  margin-left: 1rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.75rem;
}

.article-hero-media {
  margin-bottom: 1.5rem;
  border-radius: var(--radius);
  overflow: hidden;
}

/* ===== プロース / 本文 ===== */
.prose {
  font-size: 1rem;
  line-height: 1.75;
  color: #111;
}

.prose h2 {
  font-family: var(--font-head);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 2rem 0 0.5rem;
  padding-bottom: 0.375rem;
  border-bottom: 1px solid var(--c-gray-200);
}

.prose h3 {
  font-family: var(--font-head);
  font-size: 1.125rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
}

.prose p {
  margin-bottom: 1rem;
}

.prose ul, .prose ol {
  list-style: disc;
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.prose ol {
  list-style: decimal;
}

.prose li {
  margin-bottom: 0.375rem;
}

.prose a {
  color: var(--c-black);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.prose a:hover {
  opacity: 0.7;
}

.prose strong {
  font-weight: 700;
}

.prose em {
  font-style: italic;
}

.prose blockquote {
  border-left: 3px solid var(--c-black);
  padding-left: 1.25rem;
  margin: 1.5rem 0;
  color: var(--c-gray-600);
  font-style: italic;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9375rem;
}

.prose th, .prose td {
  border: 1px solid var(--c-gray-200);
  padding: 0.625rem 0.875rem;
  text-align: left;
}

.prose th {
  background: var(--c-gray-100);
  font-weight: 700;
  font-family: var(--font-head);
}

/* ===== セクション見出し ===== */
.section-heading {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

p.subtitle {
  font-size: 0.9rem;
  color: var(--c-gray-600);
  margin-bottom: 1.5rem;
}

/* ===== カードグリッド ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: calc(var(--gap) * 1.5);
}

.work-card {
  border: 1px solid var(--c-gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
  background: var(--c-white);
}

.work-card:hover {
  border-color: var(--c-black);
}

.card-media {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--c-gray-100);
}

.card-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.work-card:hover .card-thumb {
  transform: scale(1.02);
}

.card-body {
  padding: 1rem;
}

.card-title {
  font-family: var(--font-head);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 0.5rem;
}

.card-title a {
  text-decoration: none;
}

.card-title a:hover {
  text-decoration: underline;
}

.card-desc {
  font-size: 0.8125rem;
  color: var(--c-gray-600);
  line-height: 1.5;
  margin-bottom: 0.5rem;
}

.card-body time {
  display: block;
  font-size: 0.75rem;
  color: var(--c-gray-400);
  font-family: var(--font-head);
}

/* ===== ナビハイライトカード ===== */
.content-section--nav-highlights {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.nav-highlight-card {
  border-top: 1px solid var(--c-gray-200);
  padding: 1rem 0;
}

.nav-highlight-card:last-child {
  border-bottom: 1px solid var(--c-gray-200);
}

.nav-highlight-card h3 {
  font-family: var(--font-head);
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.nav-highlight-card p {
  font-size: 0.8125rem;
  color: var(--c-gray-600);
}

/* ===== 関連カード ===== */
.content-section--related {
  background: var(--c-gray-100);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.related-card {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--c-gray-200);
}

.related-card:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.related-card h3 {
  font-family: var(--font-head);
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.related-card p {
  font-size: 0.8125rem;
  color: var(--c-gray-600);
}

/* ===== サイドバー ===== */
.content-aside {
  min-width: 0;
  position: sticky;
  top: calc(var(--header-h) + 1.5rem);
  align-self: start;
}

.aside-block {
  border: 1px solid var(--c-gray-200);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.aside-title {
  font-family: var(--font-head);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 1rem;
}

.aside-links li {
  border-bottom: 1px solid var(--c-gray-100);
}

.aside-links li:last-child {
  border-bottom: none;
}

.aside-links a {
  display: block;
  padding: 0.5rem 0;
  font-size: 0.875rem;
  color: var(--c-gray-600);
  transition: color var(--transition);
}

.aside-links a:hover {
  color: var(--c-black);
}

.aside-notice {
  margin-top: 1rem;
  font-size: 0.75rem;
  color: var(--c-gray-400);
  line-height: 1.5;
  border-top: 1px solid var(--c-gray-200);
  padding-top: 0.75rem;
}

/* ===== About 固有 ===== */
.about-label,
.privacy-label {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--c-black);
  color: var(--c-white);
  padding: 0.2rem 0.625rem;
  border-radius: 3px;
  margin-bottom: 1rem;
}

.content-header--about {
  text-align: center;
  border-bottom: 2px solid var(--c-black);
  padding-bottom: 2rem;
  margin-bottom: 2rem;
}

.about-lead {
  font-size: 1.0625rem;
  color: var(--c-gray-600);
  line-height: 1.7;
  max-width: 56ch;
  margin: 0.75rem auto 0;
}

.about-sitemap {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.5rem;
}

.about-sitemap li {
  border: 1px solid var(--c-gray-200);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.about-sitemap li:hover {
  border-color: var(--c-black);
}

.about-sitemap a {
  display: block;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-family: var(--font-head);
  font-weight: 500;
  min-height: 44px;
}

.site-info-dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.375rem 1rem;
  font-size: 0.875rem;
  margin-top: 0.75rem;
}

.site-info-dl dt {
  font-weight: 700;
  color: var(--c-gray-600);
  font-family: var(--font-head);
}

/* ===== パンくずリスト ===== */
.breadcrumb {
  background: var(--c-gray-100);
  border-bottom: 1px solid var(--c-gray-200);
}

.breadcrumb p {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0.625rem calc(var(--gap) * 2);
  font-size: 0.8125rem;
  color: var(--c-gray-400);
}

.breadcrumb a {
  color: var(--c-gray-600);
  transition: color var(--transition);
}

.breadcrumb a:hover {
  color: var(--c-black);
}

.breadcrumb span {
  color: var(--c-gray-400);
}

/* ===== フッター ===== */
.footer-cta-block {
  background: var(--c-black);
  color: var(--c-white);
  text-align: center;
  padding: calc(var(--gap) * 3) var(--gap);
}

.footer-cta-text {
  font-family: var(--font-head);
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.footer-cta-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 2rem;
  min-height: 48px;
  background: var(--c-white);
  color: var(--c-black);
  font-family: var(--font-head);
  font-weight: 700;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  transition: opacity var(--transition);
}

.footer-cta-btn:hover {
  opacity: 0.85;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: calc(var(--gap) * 2);
  max-width: var(--max-w);
  margin: 0 auto;
  padding: calc(var(--gap) * 2.5) calc(var(--gap) * 2);
  border-bottom: 1px solid var(--c-gray-200);
}

.footer-brand-name {
  font-family: var(--font-head);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.footer-address {
  font-style: normal;
  font-size: 0.875rem;
  color: var(--c-gray-600);
  line-height: 1.7;
}

.footer-address a {
  color: var(--c-black);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-col--links ul {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.footer-col--links li {
  border-bottom: 1px solid var(--c-gray-100);
}

.footer-col--links li:first-child {
  border-top: 1px solid var(--c-gray-100);
}

.footer-col--links a {
  display: block;
  padding: 0.5rem 0;
  font-size: 0.875rem;
  min-height: 40px;
  display: flex;
  align-items: center;
  transition: color var(--transition);
}

.footer-col--links a:hover {
  color: var(--c-gray-600);
}

.footer-bottom {
  text-align: center;
  padding: 1.5rem var(--gap);
  background: var(--c-black);
  color: rgba(255,255,255,0.6);
}

.footer-bottom p {
  font-size: 0.8125rem;
  line-height: 1.6;
}

.footer-notice {
  margin-top: 0.375rem;
  font-size: 0.75rem !important;
  color: rgba(255,255,255,0.4) !important;
}

/* ===== スクロールアニメーション ===== */
@media (prefers-reduced-motion: no-preference) {
  .work-card,
  .nav-highlight-card,
  .related-card,
  .about-sitemap li {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.4s ease, transform 0.4s ease, border-color var(--transition);
  }

  .work-card.is-visible,
  .nav-highlight-card.is-visible,
  .related-card.is-visible,
  .about-sitemap li.is-visible {
    opacity: 1;
    transform: translateY(0);
  }

  .hero-text-block {
    opacity: 0;
    transform: translateX(12px);
    transition: opacity 0.5s ease 0.1s, transform 0.5s ease 0.1s;
  }

  .hero-text-block.is-visible {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ===== レスポンシブ ===== */
@media (max-width: 1024px) {
  .layout-main {
    grid-template-columns: 1fr 240px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-h: 56px;
  }

  .header-inner {
    display: flex;
    justify-content: center;
    padding: 0 3.5rem 0 1rem;
  }

  .header-left,
  .header-right,
  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-header {
    position: sticky;
    overflow: visible;
    height: auto;
    min-height: var(--header-h);
  }

  .mobile-menu[hidden] {
    display: none;
  }

  .mobile-menu {
    display: block;
  }

  .hero-section {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-text-block {
    align-items: flex-start;
    text-align: left;
    padding: 2rem 1.25rem 1.5rem;
    order: 1;
  }

  .hero-media {
    min-height: 200px;
    order: 2;
  }

  .layout-main {
    grid-template-columns: 1fr;
    padding: 1.5rem 1rem;
    gap: 2rem;
  }

  .content-aside {
    position: static;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    padding: 1.5rem 1rem;
  }

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

  .about-sitemap {
    grid-template-columns: 1fr;
  }

  .page-h1 {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .hero-h1 {
    font-size: 1.5rem;
  }

  .footer-cta-text {
    font-size: 1.125rem;
  }
}

/* ===== プリント ===== */
@media print {
  .site-header,
  .nav-toggle,
  .content-aside,
  .footer-cta-block,
  .breadcrumb {
    display: none;
  }

  .layout-main {
    grid-template-columns: 1fr;
  }

  body {
    font-size: 12pt;
  }
}