/* ============================================================
   オーナーズノート / main.css
   帳票エディトリアル：罫線と余白で構造を示し、数字を主役にする
   ============================================================ */

:root {
  --ink: #16212c;
  --ink-70: #4a5561;
  --ink-50: #6b7480;
  --paper: #f7f5f0;
  --paper-2: #fffefb;
  --teal: #0c6b5d;
  --teal-dark: #095246;
  --teal-light: #dceae6;
  --verm: #c2452b;
  --verm-light: #f6e3de;
  --line: #d5cfc3;
  --line-strong: #b8b0a0;
  --sans: 'Noto Sans JP', system-ui, -apple-system, 'Hiragino Kaku Gothic ProN', sans-serif;
  --serif: 'Noto Serif JP', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  --shadow-none: none;
  --radius: 4px;
  --max: 1120px;
  --content: 760px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.95;
  color: var(--ink);
  background: var(--paper);
  font-feature-settings: 'palt' 1;
  letter-spacing: 0.01em;
}

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

a {
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  text-decoration-thickness: 1px;
}

a:hover {
  color: var(--teal-dark);
}

:focus-visible {
  outline: 2px solid var(--verm);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 10px 16px;
  z-index: 100;
}

.skip-link:focus {
  left: 8px;
  top: 8px;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- ヘッダー ---------- */

.site-header {
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 40;
}

.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.brand__mark {
  width: 30px;
  height: 30px;
  color: var(--teal);
  flex: none;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand__name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.04em;
}

.brand__en {
  font-size: 9.5px;
  letter-spacing: 0.26em;
  color: var(--ink-50);
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line-strong);
  background: var(--paper-2);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 13px;
  padding: 8px 14px;
  border-radius: var(--radius);
  cursor: pointer;
}

.site-nav ul {
  display: flex;
  gap: 22px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a[aria-current='page'] {
  border-bottom-color: var(--teal);
  color: var(--teal);
}

/* ---------- ヒーロー ---------- */

.hero {
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
}

.hero__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 56px 24px 48px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero__tagline {
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--teal);
  margin: 0 0 14px;
}

.hero__title {
  font-family: var(--serif);
  font-size: 38px;
  line-height: 1.5;
  margin: 0 0 20px;
  letter-spacing: 0.01em;
}

.hero__title em {
  font-style: normal;
  background: linear-gradient(transparent 62%, var(--teal-light) 62%);
  padding: 0 2px;
}

.hero__lead {
  font-size: 15.5px;
  color: var(--ink-70);
  margin: 0 0 28px;
  max-width: 34em;
}

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero__figure {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 10px;
}

.hero__figure img {
  width: 100%;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius);
  font-size: 14.5px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid var(--teal);
  background: var(--teal);
  color: #fff;
}

.btn:hover {
  background: var(--teal-dark);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--teal);
}

.btn--ghost:hover {
  background: var(--teal-light);
  color: var(--teal-dark);
}

/* ---------- 数字ストリップ ---------- */

.stats {
  border-bottom: 1px solid var(--line);
  background: var(--ink);
}

.stats__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.stats__item {
  padding: 26px 20px;
  border-left: 1px solid rgba(255, 255, 255, 0.16);
}

.stats__item:first-child {
  border-left: 0;
}

.stats__num {
  font-family: var(--sans);
  font-size: 27px;
  font-weight: 700;
  color: #fff;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.stats__num span {
  font-size: 14px;
  margin-left: 2px;
  font-weight: 500;
}

.stats__label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 6px;
}

/* ---------- セクション ---------- */

.section {
  padding: 60px 0;
}

.section--alt {
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section__head {
  margin-bottom: 30px;
}

.section__kicker {
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--teal);
  text-transform: uppercase;
  margin: 0 0 8px;
  font-weight: 700;
}

.section__title {
  font-family: var(--serif);
  font-size: 26px;
  margin: 0 0 10px;
  padding-top: 12px;
  border-top: 3px solid var(--teal);
  display: inline-block;
}

.section__desc {
  color: var(--ink-70);
  font-size: 14.5px;
  margin: 12px 0 0;
  max-width: 46em;
}

.section__more {
  margin-top: 28px;
  font-size: 14px;
}

/* ---------- カード ---------- */

.grid {
  display: grid;
  gap: 24px;
}

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

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

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

.cat-card {
  display: block;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid var(--line);
  background: var(--paper-2);
  padding: 0 0 22px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.cat-card:hover {
  border-color: var(--teal);
  transform: translateY(-2px);
}

.cat-card__thumb {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  aspect-ratio: 3 / 2;
  overflow: hidden;
}

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

.cat-card__body {
  padding: 18px 20px 0;
}

.cat-card__name {
  font-family: var(--serif);
  font-size: 18px;
  margin: 0 0 8px;
}

.cat-card__desc {
  font-size: 13.5px;
  color: var(--ink-70);
  margin: 0;
  line-height: 1.8;
}

.cat-card__count {
  display: inline-block;
  margin-top: 12px;
  font-size: 12px;
  color: var(--teal);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* 記事カード */

.card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  background: var(--paper-2);
  text-decoration: none;
  color: var(--ink);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
  border-color: var(--teal);
  transform: translateY(-2px);
}

.card__thumb {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

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

.card__body {
  padding: 18px 20px 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11.5px;
  color: var(--ink-50);
  margin-bottom: 10px;
}

.tag {
  display: inline-block;
  font-size: 11px;
  padding: 3px 9px;
  border: 1px solid var(--teal);
  color: var(--teal);
  border-radius: 999px;
  line-height: 1.6;
}

.card__title {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.65;
  margin: 0 0 10px;
}

.card__desc {
  font-size: 13.5px;
  color: var(--ink-70);
  margin: 0;
  line-height: 1.8;
}

.card__more {
  margin-top: auto;
  padding-top: 14px;
  font-size: 13px;
  color: var(--teal);
  font-weight: 700;
}

/* リスト表示（記事一覧） */

.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.post-list li {
  border-bottom: 1px solid var(--line);
}

.post-list a {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 20px;
  align-items: center;
  padding: 20px 0;
  text-decoration: none;
  color: var(--ink);
}

.post-list a:hover .post-list__title {
  color: var(--teal);
}

.post-list__thumb {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper-2);
}

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

.post-list__title {
  font-family: var(--serif);
  font-size: 16.5px;
  margin: 0 0 6px;
  line-height: 1.6;
}

.post-list__desc {
  font-size: 13px;
  color: var(--ink-70);
  margin: 0;
}

.post-list__date {
  font-size: 12px;
  color: var(--ink-50);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* カード内の要素は span で組んでいるため、ブロック表示にする */
.card__thumb,
.cat-card__thumb,
.cat-card__body,
.cat-card__name,
.cat-card__desc,
.post-list__thumb,
.post-list__title,
.post-list__desc {
  display: block;
}

/* ---------- パンくず ---------- */

.breadcrumb {
  padding: 16px 0 0;
  font-size: 12.5px;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--ink-50);
}

.breadcrumb li + li::before {
  content: '／';
  margin-right: 6px;
  color: var(--line-strong);
}

.breadcrumb a {
  color: var(--ink-70);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--teal);
  text-decoration: underline;
}

/* ---------- 記事ページ ---------- */

.article-layout {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 24px 72px;
  display: grid;
  grid-template-columns: minmax(0, var(--content)) 288px;
  gap: 56px;
  align-items: start;
}

.article-header {
  border-bottom: 1px solid var(--line);
  padding-bottom: 24px;
  margin-bottom: 28px;
}

.article-header__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-size: 12.5px;
  color: var(--ink-50);
  margin-bottom: 14px;
  font-variant-numeric: tabular-nums;
}

.article-title {
  font-family: var(--serif);
  font-size: 32px;
  line-height: 1.5;
  margin: 0 0 16px;
  letter-spacing: 0.01em;
}

.article-lead {
  font-size: 15.5px;
  color: var(--ink-70);
  margin: 0;
}

.article-figure {
  margin: 0 0 32px;
  border: 1px solid var(--line);
  background: var(--paper-2);
}

.article-figure img {
  width: 100%;
}

.article-figure figcaption {
  font-size: 12px;
  color: var(--ink-50);
  padding: 10px 16px;
  border-top: 1px solid var(--line);
}

.pr-badge {
  display: inline-block;
  background: var(--verm);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 2px;
  line-height: 1.7;
}

.pr-notice {
  border: 1px solid var(--line-strong);
  background: var(--paper-2);
  padding: 14px 18px;
  font-size: 13px;
  color: var(--ink-70);
  margin: 0 0 28px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.pr-notice p {
  margin: 0;
}

/* 本文 */

.article-body {
  font-size: 16px;
  line-height: 2.05;
}

.article-body > * + * {
  margin-top: 1.35em;
}

.article-body h2 {
  font-family: var(--serif);
  font-size: 23px;
  line-height: 1.55;
  margin: 2.6em 0 1em;
  padding-top: 14px;
  border-top: 3px solid var(--teal);
  letter-spacing: 0.01em;
}

.article-body h3 {
  font-family: var(--serif);
  font-size: 18.5px;
  line-height: 1.6;
  margin: 2.2em 0 0.9em;
  padding-left: 14px;
  border-left: 4px solid var(--teal-light);
}

.article-body ul,
.article-body ol {
  padding-left: 1.4em;
}

.article-body li + li {
  margin-top: 0.5em;
}

.article-body strong {
  background: linear-gradient(transparent 62%, var(--teal-light) 62%);
  font-weight: 700;
}

.article-body blockquote {
  margin: 1.6em 0;
  padding: 18px 22px;
  border-left: 4px solid var(--teal);
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  color: var(--ink-70);
}

.article-body blockquote p {
  margin: 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  line-height: 1.75;
  margin: 1.6em 0;
  background: var(--paper-2);
}

.article-body th,
.article-body td {
  border: 1px solid var(--line);
  padding: 11px 13px;
  text-align: left;
  vertical-align: top;
}

.article-body thead th {
  background: var(--ink);
  color: #fff;
  font-weight: 700;
  white-space: nowrap;
}

.article-body tbody tr:nth-child(even) {
  background: #fbfaf6;
}

.table-scroll {
  overflow-x: auto;
  margin: 1.6em 0;
  border: 1px solid var(--line);
  background: var(--paper-2);
}

.table-scroll table {
  margin: 0;
  min-width: 620px;
  border: 0;
}

.table-scroll th:first-child,
.table-scroll td:first-child {
  border-left: 0;
}

.article-body code {
  background: var(--paper-2);
  border: 1px solid var(--line);
  padding: 1px 6px;
  font-size: 0.9em;
  border-radius: 2px;
}

/* ---------- 図解 ---------- */

.fig {
  margin: 2.2em 0;
  border: 1px solid var(--line);
  background: var(--paper-2);
  padding: 20px 20px 16px;
}

.fig__title {
  font-family: var(--serif);
  font-size: 15.5px;
  font-weight: 700;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.fig__svg {
  width: 100%;
  height: auto;
  display: block;
}

.fig__svg text {
  font-family: var(--sans);
}

.fig__caption {
  font-size: 12.5px;
  color: var(--ink-50);
  margin: 12px 0 0;
  line-height: 1.75;
}

/* ---------- 目次 ---------- */

.toc {
  border: 1px solid var(--line);
  background: var(--paper-2);
  padding: 20px 22px;
  margin-bottom: 28px;
}

.toc__title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--teal);
  margin: 0 0 12px;
}

.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: toc;
  font-size: 13.5px;
  line-height: 1.7;
}

.toc li {
  counter-increment: toc;
  border-top: 1px dashed var(--line);
  padding: 8px 0;
}

.toc li:first-child {
  border-top: 0;
}

.toc li::before {
  content: counter(toc, decimal-leading-zero);
  font-variant-numeric: tabular-nums;
  color: var(--teal);
  font-weight: 700;
  margin-right: 10px;
  font-size: 12px;
}

.toc a {
  text-decoration: none;
  color: var(--ink);
}

.toc a:hover {
  color: var(--teal);
  text-decoration: underline;
}

.toc li.toc--h3 {
  padding-left: 22px;
  font-size: 13px;
}

.toc li.toc--h3::before {
  content: '—';
  color: var(--line-strong);
}

/* ---------- サイドバー ---------- */

.sidebar {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 24px;
}

.sidebar__box {
  border: 1px solid var(--line);
  background: var(--paper-2);
  padding: 20px;
}

.sidebar__title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--teal);
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.sidebar__list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  line-height: 1.7;
}

.sidebar__list li + li {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.sidebar__list a {
  text-decoration: none;
  color: var(--ink);
}

.sidebar__list a:hover {
  color: var(--teal);
  text-decoration: underline;
}

.sidebar__list .date {
  display: block;
  font-size: 11.5px;
  color: var(--ink-50);
  font-variant-numeric: tabular-nums;
  margin-top: 2px;
}

.sidebar__cta {
  border: 1px solid var(--teal);
  background: var(--teal-light);
  padding: 20px;
}

.sidebar__cta p {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.8;
}

/* ---------- 広告枠 ---------- */

.affiliate-slot {
  margin: 2.4em 0;
  border: 1px solid var(--line-strong);
  background: var(--paper-2);
  padding: 20px 22px;
}

.affiliate-slot__head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.affiliate-slot__title {
  font-family: var(--serif);
  font-size: 15.5px;
  font-weight: 700;
  margin: 0;
}

.affiliate-slot__note {
  font-size: 12px;
  color: var(--ink-50);
  margin: 0 0 14px;
}

.affiliate-slot__items {
  display: grid;
  gap: 12px;
}

.affiliate-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid var(--line);
  padding: 14px 16px;
  text-decoration: none;
  color: var(--ink);
  background: var(--paper);
}

.affiliate-item:hover {
  border-color: var(--teal);
}

.affiliate-item__name {
  font-weight: 700;
  font-size: 14px;
}

.affiliate-item__note {
  font-size: 12.5px;
  color: var(--ink-50);
  margin: 4px 0 0;
}

.affiliate-item__cta {
  flex: none;
  font-size: 12.5px;
  color: var(--teal);
  font-weight: 700;
}

/* ---------- 固定ページ ---------- */

.page-header {
  border-bottom: 1px solid var(--line);
  padding: 8px 0 26px;
  margin-bottom: 34px;
}

.page-header h1 {
  font-family: var(--serif);
  font-size: 30px;
  line-height: 1.5;
  margin: 0 0 12px;
}

.page-header p {
  color: var(--ink-70);
  font-size: 15px;
  margin: 0;
}

.page-body {
  max-width: 820px;
}

.page-body h2 {
  font-family: var(--serif);
  font-size: 21px;
  margin: 2.2em 0 0.9em;
  padding-top: 12px;
  border-top: 2px solid var(--teal);
}

.page-body h3 {
  font-family: var(--serif);
  font-size: 17.5px;
  margin: 1.8em 0 0.7em;
}

.page-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 1.4em 0;
  background: var(--paper-2);
}

.page-body th,
.page-body td {
  border: 1px solid var(--line);
  padding: 11px 13px;
  text-align: left;
  vertical-align: top;
}

.page-body thead th {
  background: var(--ink);
  color: #fff;
  white-space: nowrap;
}

.page-body dl {
  margin: 1.4em 0;
  border-top: 1px solid var(--line);
}

.page-body dt {
  font-weight: 700;
  padding: 14px 0 4px;
  border-top: 1px solid var(--line);
}

.page-body dt:first-of-type {
  border-top: 0;
}

.page-body dd {
  margin: 0 0 14px;
  color: var(--ink-70);
  font-size: 14.5px;
}

.notice-box {
  border: 1px solid var(--verm);
  background: var(--verm-light);
  padding: 18px 22px;
  margin: 1.6em 0;
  font-size: 14.5px;
}

.notice-box strong {
  background: none;
}

.fill-in {
  background: #fff;
  border: 1px dashed var(--verm);
  padding: 0 6px;
  color: var(--verm);
  font-weight: 700;
}

/* ---------- フッター ---------- */

.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.78);
  margin-top: 20px;
}

.site-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 40px;
}

.brand--footer .brand__name {
  color: #fff;
}

.brand--footer .brand__en {
  color: rgba(255, 255, 255, 0.5);
}

.brand--footer .brand__mark {
  color: #6fc0b0;
}

.site-footer__tagline {
  font-family: var(--serif);
  font-size: 15px;
  color: #fff;
  margin: 16px 0 8px;
}

.site-footer__desc {
  font-size: 12.5px;
  line-height: 1.9;
  margin: 0;
  color: rgba(255, 255, 255, 0.6);
}

.site-footer__head {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: #6fc0b0;
  margin: 0 0 14px;
  font-weight: 700;
}

.site-footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13.5px;
  line-height: 2.1;
}

.site-footer__links a {
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
}

.site-footer__links a:hover {
  color: #fff;
  text-decoration: underline;
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 24px 28px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
}

.site-footer__bottom p {
  margin: 0;
}

/* ---------- 404 ---------- */

.error-page {
  text-align: center;
  padding: 90px 24px 110px;
}

.error-page__code {
  font-family: var(--serif);
  font-size: 64px;
  color: var(--teal);
  margin: 0;
  line-height: 1;
}

.error-page h1 {
  font-family: var(--serif);
  font-size: 24px;
  margin: 20px 0 12px;
}

.error-page p {
  color: var(--ink-70);
  margin: 0 0 26px;
}

/* ---------- アニメーション ---------- */

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}

/* ---------- レスポンシブ ---------- */

@media (max-width: 1024px) {
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .article-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
  }

  .sidebar {
    position: static;
  }
}

@media (max-width: 820px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 24px 36px;
  }

  .hero__title {
    font-size: 29px;
  }

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

  .stats__item:nth-child(3) {
    border-left: 0;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 720px) {
  body {
    font-size: 15.5px;
  }

  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--paper-2);
    border-bottom: 1px solid var(--line);
    padding: 10px 24px 18px;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .site-nav li {
    border-top: 1px solid var(--line);
  }

  .site-nav a {
    display: block;
    padding: 12px 0;
    border-bottom: 0;
  }

  .grid--3,
  .grid--4,
  .grid--2 {
    grid-template-columns: 1fr;
  }

  .article-title {
    font-size: 25px;
  }

  .article-body h2 {
    font-size: 20.5px;
  }

  .article-body h3 {
    font-size: 17.5px;
  }

  .article-body {
    font-size: 15.5px;
    line-height: 1.95;
  }

  .post-list a {
    grid-template-columns: 96px 1fr;
    gap: 14px;
  }

  .post-list__date {
    grid-column: 2;
  }

  .fig {
    padding: 16px 12px 12px;
  }

  .section {
    padding: 44px 0;
  }

  .wrap,
  .site-header__inner,
  .hero__inner,
  .stats__inner,
  .article-layout,
  .site-footer__inner,
  .site-footer__bottom {
    padding-left: 18px;
    padding-right: 18px;
  }

  .site-footer__bottom {
    flex-direction: column;
    gap: 6px;
  }
}

@media (max-width: 420px) {
  .hero__title {
    font-size: 25px;
  }

  .stats__num {
    font-size: 23px;
  }
}